brain teasers problem solving questions

14 challenging brainteasers and riddles only smart people can solve

• Insider compiled a list of challenging logic problems, riddles, and word puzzles.
• We've also included the answers below each picture, so don't scroll too quickly.
• Some are a play on words, while others need multiple steps to figure out.

Get ready for a challenge. 

The 14 puzzles below are a mix of riddles, logic problems, and word games, but they all have one thing in common: They'll take brainpower to solve.

Keep reading to see if you can figure out the answers — and to see how smart you really are.

1. If you have me, you want to share me. If you share me, you don't have me. What am I?

Answer : A secret.

Source: RhinoBarbarian, Reddit

2. You're escaping a labyrinth, and there are three doors in front of you. The door on the left leads to a raging inferno. The door in the center leads to a deadly assassin. The door on the right leads to a lion that hasn't eaten in three months. Which door do you choose?

Answer: The door on the right.

Explanation:  The lion would be dead after not eating for three months.

Source:  AntmanIV, Reddit

3. If I am holding a bee, what do I have in my eye?

Answer: Beauty.

Explanation:  This riddle is a play on the proverb, "Beauty is in the eye of the beholder." In this case, you are the "bee-holder." Thus, beauty is in your eye.

Source: lipwiggler, Reddit

4. An old man dies, leaving behind two sons. In his will, he orders his sons to race with their horses, and the one with the slower horse will receive his inheritance. The two sons race, but since they're both holding their horses back, they go to a wise man and ask him what they should do. After that, the brothers race again — this time at full speed. What did the wise man tell them?

Answer: To switch horses.

Explanation:  After they switch horses, whoever wins the race will get the inheritance because they still technically own the losing (i.e., slower) horse.

Source:  qweiopasd, Reddit

5. Turn me on my side and I am everything. Cut me in half and I am nothing. What am I?

Answer: The number 8.

Explanation:  On its side, the number 8 looks like an infinity symbol. Cut in half, the number 8 becomes two zeros.

Source: romz7, Reddit

6. A farmer needs to take a fox, a chicken, and a sack of grain across a river. The only way across the river is by a small boat, which can only hold the farmer and one of the three items. Left unsupervised, the chicken will eat the grain, and the fox will eat the chicken. However, the fox won't try to eat the grain, and neither the fox nor the chicken will wander off. How does the farmer get everything across the river?

Answer: The farmer must follow these steps.

1. Take the chicken across the river. 2. Come back with an empty boat. 3. Take the grain across the river. 4. Bring the chicken back. 5. Take the fox across the river. 6. Come back with an empty boat. 7. Take the chicken across the river.

Source: someguyinworld, Reddit

7. If you have a 7-minute hourglass and an 11-minute hourglass, how can you boil an egg in exactly 15 minutes?

Answer: To boil the egg in exactly 15 minutes, follow these steps.

1. Start both hourglasses as you start boiling the egg. 2. After the 7-minute hourglass runs out, turn it to start it again. 3. Four minutes later, when the 11-minute hourglass runs out, turn the 7-minute hourglass again. 4. Wait for the 7-minute hourglass to run out, which will take another four minutes and get you to exactly 15 minutes of boiling time.

Source:  DarylHannahMontana, Reddit

8. You are walking down a road and come to a fork. One path leads to certain death; the other leads to eternal happiness. You don't know which is which. In the middle of the fork, you come across two brothers who know which road is which. One brother always tells the truth and the other always lies. You can only ask them one question. How would you determine which road to take?

Answer: Ask each brother, "If you were your brother, which road would you say leads to eternal happiness?"

Explanation:  Let's say the path on the right leads to eternal happiness. After you ask your question, both brothers will tell you the exact same thing: "He would say the left path leads to eternal happiness."

As Reddit user OnscreenForecaster explained, "In either case ... you would pick the opposite of what they both say because one is telling the truth about it being a lie, and one is lying about it being the truth."

Source:  SneeKeeFahk, Reddit

9. What is next in this sequence of numbers: 1, 11, 21, 1211, 111221, 312211, ______?

Answer: 13112221.

Explanation:  Each sequence of numbers is a verbal representation of the sequence before it. Thus, starting with 1, the next sequence would be "one one," or "11." That sequence is followed by "two one," or "21," and so on and so forth.

Still confused? Here's a good explanation by Reddit user hankthetank921 :

The first number is just ONE (amount) "1" (0-9 numeral). So if you say there's ONE "1" (seriously just say it aloud) the next number would be an 11. Then there are TWO "1's", creating 21. Then ONE "2" and ONE "1" which creates 1,211. Then ONE "1", ONE "2", and TWO "1's" creating 111,221 ... and so on.

Source: arsenal7777, Reddit

10. Four people arrive at a river with a narrow bridge that can only hold two people at a time. It's nighttime and they have one torch that has to be used when crossing the bridge. Person A can cross the bridge in one minute, B in two minutes, C in five minutes, and D in eight minutes. When two people cross the bridge together, they must move at the slower person's pace. Can they all get across the bridge in 15 minutes or less?

Answer: Yes, they can cross in exactly 15 minutes.

Explanation:  The group of four must follow these steps.

1. First, A and B cross the bridge and A brings the light back. This takes 3 minutes. 2. Next, C and D cross and B brings the light back. This takes another 10 minutes. 3. Finally, A and B cross again. This takes another 2 minutes.

Source:  bananaslayer100, Reddit

11. A rebus is a pictogram that represents a word, phrase, or saying. For example, "Ci ii" represents "See eye to eye." What word or phrase does the following rebus represent: O_ER_T_O_?

Answer: Painless operation.

Explanation :  The letters missing in O_ER _T _O_ (OPERATION) spell out PAIN. Thus, "pain-less" operation.

Source:  kjivxx, Reddit

12. During a recent census, a man told the census taker that he had three children. When asked their ages, he replied, "The product of their ages is 72. The sum of their ages is the same as my house number." The census taker ran to the man's front door and looked at the house number. "I still can't tell," she complained. The man replied, "Oh that's right, I forgot to tell you that the oldest one likes chocolate pudding." The census taker then promptly wrote down the ages of the three children. How old are they?

Answer: 3, 3, and 8.

Explanation:  As Reddit users  TT1103 and RedditRage explained, the key to this brain teaser is that the census taker looks at the house number. In other words, she knows the sum of the children's ages.

However, at that point of the riddle, she still can't tell how old the man's children are. Therefore, she has to be stuck between multiple possibilities. To narrow it down further, only two sets of numbers that multiply to 72 share the same sum: (2,6,6) and (3,3,8).

After the man reveals that his oldest   child likes chocolate pudding, however, the census taker can differentiate between the two options. That is, only the latter of those two sets has a distinct "oldest" child.

Source: mikebrown_pelican, Reddit

13. You're in a dark room with a candle, a wood stove, and a gas lamp. You only have one match, so what do you light first?

Answer: The match.

Source: notarobot45, Reddit

14. There are five bags of gold that all look identical, and each has 10 gold pieces in it. One of the five bags has fake gold in it. The real gold, fake gold, and all five bags are identical in every way, except the pieces of fake gold each weigh 1.1 grams, and the real gold pieces each weigh 1 gram. You have a perfectly accurate digital gram scale and can use it only once. How do you determine which bag has the fake gold?

Answer: Take one gold piece from the first bag, two from the second bag, three from the third bag, four from the fourth bag, and five from the fifth bag. If the weight on the scale ends in .1, then you know the first bag has the fake gold. If the weight on the scale ends in .2, then the second bag has the fake gold, and so on and so forth.

Source: dankability, Reddit

• Main content

22 Logic Puzzle Questions To Challenge Your Mind!

Public Events

Jane Ng • 31 Aug 2023 • 6 min read

Looking for Logic puzzle questions to challenge your logic skills without breaking a sweat? You’re in the right place! In this blog post, we’ll provide a list of 22 delightful logic puzzle questions that will make you think, and ponder as you find their right answers. So, gather ’round, get comfy, and let’s embark on a journey into the world of riddles and brain teasers!

Table Of Contents

Level #1 – easy logic puzzle questions.

• Level #2 – Logic Puzzle Questions In Math 

Level #3 – Logic Puzzle Questions For Adults

Key takeaways.

1/ Question: If an electric train is moving north at 100 mph and the wind is blowing to the west at 10 mph, which way does the smoke from the train go? Answer: Electric trains don’t produce smoke.

2/ Question: Three friends – Alex, Phil Dunphy, and Claire Pritchett – went to a movie. Alex sat next to Phil, but not next to Claire. Who sat next to Claire? Answer: Phil sat next to Claire.

3/ Question: There are six glasses in a row. The first three are filled with milk, and the next three are empty. Can you rearrange six glasses so that the full and empty glasses are in alternating order by moving only one glass?

Answer: Yes, pour milk from the second glass into the fifth glass.

4/ Question: A man stands on one side of a river, his dog on the other. A man calls his dog, who immediately traverses the river without getting wet. How did the dog do it? Answer: The river was frozen, so the dog walked across the ice.

5/ Question: Sara is twice as old as Mike. If Mike is 8 years old, how old is Sara? Answer: Sara is 16 years old.

6/ Question: Four people need to cross a rickety bridge at night. They have only one flashlight and the bridge can only hold two people at a time. The four people walk at different speeds: one can cross the bridge in 1 minute, another in 2 minutes, the third in 5 minutes, and the slowest in 10 minutes. When two people cross the bridge together, they must go at the slower person’s pace. The speed of two people crossing a bridge together is limited by the speed of the slower person. 

Answer: 17 minutes. First, the two fastest cross together (2 minutes). Then, the fastest returns with the flashlight (1 minute). The two slowest cross together (10 minutes). Finally, the second fastest returns with the flashlight (2 minutes).

Level #2 – Logic Puzzle Questions In Math 

7/ Question: A man gave one son 10 cents and another son was given 15 cents. What time is it? Answer: The time is 1:25 (a quarter past one).

8/ Question: If you multiply my age by 2, add 10, and then divide by 2, you’ll get my age. How old am I? Answer: You are 10 years old.

9/ Question: What is the weight of the three animals in the photo?

Answer: 27kg

10/ Question: If a snail climbs up a 10-foot pole during the day and then slips down 6 feet during the night, how many days will it take for the snail to reach the top?

Answer: 4 days. (On the first day, the snail climbs 10 feet during the day and then slips 6 feet during the night, leaving it at 4 feet. On the second day, it climbs another 10 feet, reaching 14 feet. On the third day, it climbs another 10 feet, reaching 24 feet. Finally, on the fourth day, it climbs the remaining 6 feet to reach the top.)

11/ Question: If you have 8 red balls, 5 blue balls, and 3 green balls in a bag, what is the probability of drawing a blue ball on the first try? Answer: The probability is 5/16. (There are a total of 8 + 5 + 3 = 16 balls. There are 5 blue balls, so the probability of drawing a blue ball is 5/16.)

12/ Question: A farmer has chickens and goats. There are 22 heads and 56 legs. What is the number of each animal that the farmer has? Answer: The farmer has 10 chickens and 12 goats.

13/ Question: How many times can you subtract 5 from 25? Answer : Once. (After subtracting 5 once, you’d be left with 20, and you can’t subtract 5 from 20 without going into negative numbers.)

14/ Question: What three positive numbers give the same answer when multiplied and added together? Answer: 1, 2, and 3. (1 * 2 * 3 = 6, and 1 + 2 + 3 = 6.)

15/ Question: If a pizza is cut into 8 slices and you eat 3, what percentage of the pizza have you consumed? Answer: You have consumed 37.5% of the pizza. (To calculate the percentage, divide the number of slices you’ve eaten by the total number of slices and multiply by 100: (3 / 8) * 100 = 37.5%.)

16/ Question: Which of the four pictures a, b, c, d, is the correct answer?

Answer: Picture b

17/ Question: If three people check into a hotel room that costs $30, they each contribute $10. Later, the hotel manager realized there was a mistake and the room should have cost $25. The manager gives $5 to the bellboy and asks him to return it to the guests. The bellboy, however, keeps $2 and gives each guest $1. Now, each guest has paid $9 (totaling $27) and the bellboy has $2, which makes $29. What became of the $1 that was missing?

Answer: The missing dollar riddle is a trick question. The $27 that the guests paid includes the $25 for the room and the $2 that the bellboy kept.

18/ Question: A man is pushing his car along a road when he comes to a hotel. He shouts, “I’m bankrupt!” Why? Answer: He’s playing a game of Monopoly.

19/ Question: If a man buys a shirt for $20 and sells it for $25, is this a 25% profit?

Answer: No. (The cost price of the shirt is $20, and the selling price is $25. The profit is $25 – $20 = $5. To calculate the profit percentage, you divide the profit by the cost price and then multiply by 100: (5 / 20) * 100 = 25%. The profit percentage is 25%, not the profit amount.)

20/ Question: If a car’s speed increases from 30 mph to 60 mph, how much does the speed increase in terms of a percentage? Answer: The speed increases by 100%.

21/ Question: If you have a rectangular garden that is 4 feet long and 5 feet wide, what is the perimeter? Answer: The perimeter is 18 feet. (The formula for the perimeter of a rectangle is P = 2 * (length + width). In this case, P = 2 * (4 + 5) = 2 * 9 = 18 feet.)

22/ Question: If two hours ago, it was as long after one o’clock as it was before one o’clock, what time is it now? Answer: It’s 2 o’clock.

In the world of logic puzzles, every twist and turn unveils a new challenge for our minds to conquer. To elevate your puzzle experience and add an interactive touch, check out AhaSlide’s features . With AhaSlides, you can turn these puzzles into shared adventures, sparking friendly competitions and lively discussions. Ready to dive in? Visit our templates and bring an extra layer of fun to your logic puzzle journey!

What is an example of a logic puzzle?

Example of a Logic Puzzle: If two hours ago, it was as long after one o’clock as it was before one o’clock, what time is it now? Answer: It’s 2 o’clock.

Where can I find logic puzzles?

You can find logic puzzles in books, puzzle magazines, online puzzle websites, mobile apps, and AhaSlides dedicated to puzzles and brain teasers.

What is a logic puzzle meaning?

A logic puzzle is a type of game or activity that challenges your reasoning and problem-solving skills. It involves using logical deductions to analyze given information and arrive at a correct solution.

Ref: Parade | Buzzfeed  

A writer who wants to create practical and valuable content for the audience

More from AhaSlides

20 Tough Riddles for Adults That Will Have You Scratching Your Head

Put your logic and math skills to the test. No cheating!

So go grab a pencil and a piece of scratch paper and prepare to rip your hair out (and we really do mean that in the best way possible). When you think you’ve got the right answer, click the link at the bottom of each riddle to find the solution. Got it wrong? No worries, you have 19 other riddles to test out.

Navigate Through Our Riddles:

Puzzmo / The King’s Orders / How Many Eggs? / The Gold Chain / Pickleball / Circuit Breaker / Two Trains, Two Grandmas / Ant Math / Peppermint Patty / Great American Rail Trail / A Cruel SAT Problem / Movie Stars Cross a River / Tribute to a Math Genius / One Belt, One Earth / Elbow Tapping / Whiskey Problem / Doodle Problem / Stumping Scientists / What ’ s On Her Forehead? / Keanu for President / Who Opened the Lockers?

Riddle No. 1: The King’s Orders Make for One Hell of a Brain Teaser

Difficulty: easy.

King Nupe of the kingdom Catan dotes on his two daughters so much that he decides the kingdom would be better off with more girls than boys, and he makes the following decree: All child-bearing couples must continue to bear children until they have a daughter!

But to avoid overpopulation, he makes an additional decree: All child-bearing couples will stop having children once they have a daughter! His subjects immediately begin following his orders.

After many years, what’s the expected ratio of girls to boys in Catan?

The likelihood of each baby born being a girl is, of course, 50 percent.

Ready for the solution? Click here to see if you’re right .

Riddle No. 2: How Many Eggs Does This Hen Lay?

This problem is in honor of my dad, Harold Feiveson. It’s due to him that I love math puzzles, and this is one of the first problems (of many) that he gave me when I was growing up.

A hen and a half lays an egg and a half in a day and a half. How many eggs does one hen lay in one day?

Riddle No. 3: The Gold Chain Math Problem Is Deceptively Simple

Difficulty: moderate.

You’re rummaging around your great grandmother’s attic when you find five short chains each made of four gold links. It occurs to you that if you combined them all into one big loop of 20 links, you’d have an incredible necklace. So you bring it into a jeweler, who tells you the cost of making the necklace will be $10 for each gold link that she has to break and then reseal.

How much will it cost?

Riddle No. 4: Try to Solve This Pickleball Puzzle

Difficulty: 🚨hard🚨.

Kenny, Abby, and Ned got together for a round-robin pickleball tournament, where, as usual, the winner stays on after each game to play the person who sat out that game. At the end of their pickleball afternoon, Abby is exhausted, having played the last seven straight games. Kenny, who is less winded, tallies up the games played:

Kenny played eight games

Abby played 12 games

Ned played 14 games

Who won the fourth game against whom?

How many total games were played?

Riddle No. 5: Our Circuit Breaker Riddle Is Pure Evil. Sorry.

The circuit breaker box in your new house is in an inconvenient corner of your basement. To your chagrin, you discover none of the 100 circuit breakers is labeled, and you face the daunting prospect of matching each circuit breaker to its respective light. (Suppose each circuit breaker maps to only one light.)

To start with, you switch all 100 lights in the house to “on,” and then you head down to your basement to begin the onerous mapping process. On every trip to your basement, you can switch any number of circuit breakers on or off. You can then roam the hallways of your house to discover which lights are on and which are off.

What is the minimum number of trips you need to make to the basement to map every circuit breaker to every light?

The solution does not involve either switching on or off the light switches in your house or feeling how hot the lightbulbs are. You might want to try solving for the case of 10 unlabeled circuit breakers first.

Riddle No. 6: Two Trains. Two Grandmas. Can You Solve This Tricky Math Riddle?

Jesse’s two grandmothers want to see him every weekend, but they live on opposite sides of town. As a compromise, he tells them that every Sunday, he’ll head to the subway station nearest to his apartment at a random time of the day and will hop on the next train that arrives.

If it happens to be the train traveling north, he’ll visit his Grandma Erica uptown, and if it happens to be the train traveling south, he’ll visit his Grandma Cara downtown. Both of his grandmothers are okay with this plan, since they know both the northbound and southbound trains run every 20 minutes.

But after a few months of doing this, Grandma Cara complains that she sees him only one out of five Sundays. Jesse promises he’s indeed heading to the station at a random time each day. How can this be?

The trains always arrive at their scheduled times.

Riddle No. 7: Here’s a Really F@*#ing Hard Math Problem About Ants

Max and Rose are ant siblings. They love to race each other, but always tie, since they actually crawl at the exact same speed. So they decide to create a race where one of them (hopefully) will win.

For this race, each of them will start at the bottom corner of a cuboid, and then crawl as fast as they can to reach a crumb at the opposite corner. The measurements of their cuboids are as pictured:

If they both take the shortest possible route to reach their crumb, who will reach their crumb first? (Don’t forget they’re ants, so of course they can climb anywhere on the edges or surface of the cuboid.)

Remember: Think outside the box.

Riddle No. 8: This Peppermint Patty Riddle Is Practically Impossible

You’re facing your friend, Caryn, in a “candy-off,” which works as follows: There’s a pile of 100 caramels and one peppermint patty. You and Caryn will go back and forth taking at least one and no more than five caramels from the candy pile in each turn. The person who removes the last caramel will also get the peppermint patty. And you love peppermint patties.

Suppose Caryn lets you decide who goes first. Who should you choose in order to make sure you win the peppermint patty?

First, solve for a pile of 10 caramels.

Riddle No. 9: Can You Solve the Great American Rail-Trail Riddle?

This problem was suggested by the physicist P. Jeffrey Ungar.

Finally, the Great American Rail-Trail across the whole country is complete! Go ahead, pat yourself on the back—you’ve just installed the longest handrail in the history of the world, with 4,000 miles from beginning to end. But just after the opening ceremony, your assistant reminds you that the metal you used for the handrail expands slightly in summer, so that its length will increase by one inch in total.

“Ha!” you say, “One inch in a 4,000 mile handrail? That’s nothing!” But … are you right?

Let’s suppose when the handrail expands, it buckles upward at its weakest point, which is in the center. How much higher will pedestrians in the middle of the country have to reach in summer to grab the handrail? That is, in the figure below, what is h ? (For the purposes of this question, ignore the curvature of the Earth and assume the trail is a straight line.)

Pythagoras is a fascinating historical figure.

Riddle No. 10: This Riddle Is Like an Especially Cruel SAT Problem. Can You Find the Answer?

Amanda lives with her teenage son, Matt, in the countryside—a car ride away from Matt’s school. Every afternoon, Amanda leaves the house at the same time, drives to the school at a constant speed, picks Matt up exactly when his chess club ends at 5 p.m., and then they immediately return home together at the same constant speed. But one day, Matt isn’t feeling well, so he leaves chess practice early and starts to head home on his portable scooter.

After Matt has been scooting for an hour, Amanda comes across him in her car (on her usual route to pick him up), and they return together, arriving home 40 minutes earlier than they usually do. How much chess practice did Matt miss?

Consider the case where Amanda meets Matt exactly as she’s leaving their house.

Riddle No. 11: Can You Get These 3 Movie Stars Across the River?

Three movie stars, Chloe, Lexa, and Jon, are filming a movie in the Amazon. They’re very famous and very high-maintenance, so their agents are always with them. One day, after filming a scene deep in the rainforest, the three actors and their agents decide to head back to home base by foot. Suddenly, they come to a large river.

On the riverbank, they find a small rowboat, but it’s only big enough to hold two of them at one time. The catch? None of the agents are comfortable leaving their movie star with any other agents if they’re not there as well. They don’t trust that the other agents won’t try to poach their star.

For example, Chloe’s agent is okay if Chloe and Lexa are alone in the boat or on one of the riverbanks, but definitely not okay if Lexa’s agent is also with them. So how can they all get across the river?

There isn’t just one way to solve this problem.

Riddle No. 12: This Ludicrously Hard Riddle Is Our Tribute to a Late Math Genius. Can You Figure It Out?

On April 11, John Horton Conway , a brilliant mathematician who had an intense and playful love of puzzles and games, died of complications from COVID-19. Conway is the inventor of one of my favorite legendary problems (not for the faint of heart) and, famously, the Game of Life . I created this problem in his honor.

Carol was creating a family tree, but had trouble tracking down her mother’s birthdate. The only clue she found was a letter written from her grandfather to her grandmother on the day her mother was born. Unfortunately, some of the characters were smudged out, represented here with a “___” . (The length of the line does not reflect the number of smudged characters.)

“Dear Virginia,

Little did I know when I headed to work this Monday morning, that by evening we would have a beautiful baby girl. And on our wedding anniversary, no less! It makes me think back to that incredible weekend day, J___ 27th, 19___ , when we first shared our vow to create a family together, and, well, here we are! Happy eighth anniversary, my love.

Love, Edwin”

The question: When was Carol’s mother born?

This problem is inspired by Conway’s Doomsday Rule .

Riddle No. 13: To Solve This Twisty Math Riddle, You Just Need One Belt and One Earth

Imagine you have a very long belt. Well, extremely long, really … in fact, it’s just long enough that it can wrap snugly around the circumference of our entire planet. (For the sake of simplicity, let’s suppose Earth is perfectly round, with no mountains, oceans, or other barriers in the way of the belt.)

Naturally, you’re very proud of your belt. But then your brother, Peter, shows up—and to your disgruntlement, he produces a belt that’s just a bit longer than yours. He brags his belt is longer by exactly his height: 6 feet.

If Peter were also to wrap his belt around the circumference of Earth, how far above the surface could he suspend the belt if he pulled it tautly and uniformly?

Earth’s circumference is about 25,000 miles, or 130 million feet … but you don’t need to know that to solve this problem.

Riddle No. 14: This Elbow Tapping Riddle Is Diabolical. Good Luck Solving It.

In some future time, when the shelter-in-place bans are lifted, a married couple, Florian and Julia, head over to a bar to celebrate their newfound freedom.

They find four other couples there who had the same idea.

Eager for social contact, every person in the five couples enthusiastically taps elbows (the new handshake) with each person they haven’t yet met .

It actually turns out many of the people had known each other prior, so when Julia asks everyone how many elbows they each tapped, she remarkably gets nine different answers!

The question: How many elbows did Florian tap?

What nine answers did Julia hear?

Riddle No. 15: You’ll Need a Drink After Trying to Solve This Whisky Riddle

Alan and Claire live by the old Scottish saying, “Never have whisky without water, nor water without whisky!” So one day, when Alan has in front of him a glass of whisky, and Claire has in front of her a same-sized glass of water, Alan takes a spoonful of his whisky and puts it in Claire’s water. Claire stirs her whisky-tinted water, and then puts a spoonful of this mixture back into Alan’s whisky to make sure they have exactly the same amount to drink.

So: Is there more water in Alan’s whisky, or more whisky in Claire’s water? And does it matter how well Claire stirred?

The size of the spoon does not matter.

Riddle No. 16: The Doodle Problem Is a Lot Harder Than It Looks. Can You Solve It?

This week’s riddle is relatively simple—but sinister all the same.

The question: Can you make 100 by interspersing any number of pluses and minuses within the string of digits 9 8 7 6 5 4 3 2 1? You can’t change the order of the digits! So what’s the least number of pluses and minuses needed to make 100?

For instance, 98 - 7 - 6 + 54 - 32 shows one way of interspersing pluses and minuses, but since it equals 107, it’s not a solution.

I call this a “doodle problem”: one that’s best worked on during meetings where you might be doodling otherwise.

You might want to start looking for solutions that use a total of seven pluses and minuses (although there are ways to use fewer).

Ready for the solution? Click here to see if you’re right.

Riddle No. 17: This Math Puzzle Stumped Every Scientist but One. Think You Can Crack It?

Difficulty: hard.

In honor of Freeman Dyson, the renowned physicist who died last month , here’s a legendary tale demonstrating his quick wit and incredible brain power.

One day, in a gathering of top scientists, one of them wondered out loud whether there exists an integer that you could exactly double by moving its last digit to its front. For instance, 265 would satisfy this if 526 were its exact double—which it isn’t.

After apparently just five seconds , Dyson responded, “Of course there is, but the smallest such number has 18 digits.”

This left some of the smartest scientists in the world puzzling over how he could have figured this out so quickly.

So given Dyson’s hint, what is the smallest such number?

My second grader has recently learned how to add a 3-digit number to itself using the classic vertical method:

18-digit numbers, of course, can be added in the same way.

Riddle No. 18: Figure Out What’s on Her Forehead

Cecilia loves testing the logic of her very logical friends Jaya, Julian, and Levi, so she announces:

“I’ll write a positive number on each of your foreheads. None of the numbers are the same, and two of the numbers add up to the third.”

She scribbles the numbers on their heads, then turns to Jaya and asks her what her number is. Jaya sees Julian has 20 on his forehead, and Levi has 30 on his. She thinks for a moment and then says, “I don’t know what my number is.” Julian pipes in, “I also don’t know my number,” and then Levi exclaims, “Me neither!” Cecilia gleefully says, “I’ve finally stumped you guys!”

“Not so fast!” Jaya says. “Now I know my number!”

What is Jaya’s number?

Jaya could be one of two numbers, but only one of those numbers would lead to Julian and Levi both not knowing their numbers. Why?

Riddle No. 19: Can You Get Keanu Reeves Elected As President?

It’s 2024, and there are five candidates running in the democratic primary: Taylor Swift, Oprah Winfrey, Mark Cuban, Keanu Reeves, and Dwayne Johnson. (Hey, it could happen.) As usual, the first primary is in Iowa.

In an effort to overcome its embarrassment after the 2020 caucus debacle , the Iowa Democratic Party has just announced a new, foolproof way of finding the best candidate: there will be four consecutive elections.

First, candidate 1 will run against candidate 2. Next, the winner of that will run against candidate 3, then that winner will run against candidate 4, and finally the winner of that election will run against the final candidate. By the transitive property, the winner of this last election must be the best candidate ... so says the Iowa Democratic Party.

Candidate Keanu has been feeling pretty low, as he knows he is ranked near the bottom by most voters, and at the top by none. In fact, he knows the Iowa population is divided into five equal groups, and that their preferences are as follows:

Keanu is childhood friends with Bill S. Preston, Esq., the new head of the Iowa Democratic Party. Preston, confident that the order of the candidates doesn’t matter for the outcome, tells Keanu he can choose the voting order of the candidates.

So what order should Keanu choose?

How would Keanu fare in one-to-one races against each candidate?

Riddle No. 20: Who Opened All These Damn Lockers?

There are 100 lockers that line the main hallway of Chelm High School. Every night, the school principal makes sure all the lockers are closed so that there will be an orderly start to the next day. One day, 100 mischievous students decide that they will play a prank.

The students all meet before school starts and line up. The first student then walks down the hallway, and opens every locker. The next student follows by closing every other locker (starting at the second locker). Student 3 then goes to every third locker (starting with the third) and opens it if it’s closed, and closes it if it’s open. Student 4 follows by opening every fourth locker if it’s closed and closing it if it’s open. This goes on and on until Student 100 finally goes to the hundredth locker. When the principal arrives later in the morning, which lockers does she find open?

Make sure you pay attention to all of the factors.

Laura Feiveson is an economist for the government, a storyteller, and a lifelong enthusiast of math puzzles.  She lives in Washington, DC with her husband and two daughters. 

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100+ BRAIN TEASERS FOR KIDS AND ADULTS (WITH ANSWERS)

Brain teasers that require thought, intellect, and a dab of creativity. Moreover, teasing your brain will require you to think hard and sometimes think outside the box.

• Brain Teasers

Brain Teasers to Solve

A brain teaser is a type of puzzle that requires thinking outside of the box and using logic, creativity, and problem-solving skills to solve. It is designed to challenge and stimulate the brain, often requiring a combination of math, language, and visual skills. Brain teasers can come in many different forms, such as riddles , puzzles, and games. They can range in difficulty from easy to extremely challenging and can be solved individually or as a group. The goal of a brain teaser is often to find a hidden solution or pattern that is not immediately obvious and to use critical thinking and reasoning to arrive at the answer. Solving brain teasers can improve cognitive function, memory, and creativity, and can also be a fun and entertaining way to pass the time.

In addition, parents introduce their children to riddles for many reasons.  Solving riddles for kids can significantly accelerate brain development.

You Live In A One Story House Made Entirely Of Redwood

Carnival Trick Riddle

The mustard family riddle.

Six Faces 21 Eyes

A woman shoots her husband riddle.

There Are 10 People In A Room

Always In You, Sometimes On You; If I Surround You I Can Kill You

Strange subtraction, i have a little house in which i live all alone. it has no doors, i am a word of six; my first three letters refer to an automobile, two girls have the same parents and were born at the same hour, a time when they are green a time when they're brown, when can you add two to eleven and get one, sometimes i am born in silence, other times no i am unseen, a pregnant lady named her children, the death of romeo and juliet, i'm not clothes but i cover your body, three playing cards in a row, building riddle, search riddles, follow riddles, share riddles.

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45 Fun and Clever Brain Teasers for Kids with Answers!

Written by Laney Kennedy

Reviewed by Sarah Tino, M.Ed.

Engage and motivate your students with our adaptive, game-based learning platform!

• Game-Based Learning
• What brain teasers are
• The benefits of brain teasers for kids

Math brain teasers for kids

Sometimes keeping your students engaged during a (long) school day feels like a losing battle. How do you gain their full attention while teaching the skills they need to succeed? How do you turn tough and intimidating concepts into fun, entertaining lessons that actually spark life in the classroom? 

Brain teasers for kids are a great form of game-based learning that not only entertain children but also inspire some creative thought in the classroom. People of all ages can indulge in these playful — yet challenging — activities.

And some examples of when teachers might want to use brain teasers are on a bulletin board in the classroom, as a partnered activity to start a new concept or lesson, or during a rainy day indoor recess box.

We’ve gathered 45 examples of brain teasers for kids with answers, organized by category:

Table of Contents

Language brain teasers for kids :

Riddles ; Language associations ; Lateral thinking problems.

Math brain teasers for kids :

Math riddles ;  Pattern problems ;  Prodigy.

Visual brain teasers for kids :

Spot the difference ;  Rebus puzzles ;  Optical illusions ;  Stroop effect test.

Use the list below to find the perfect brain teaser for your class!

What are brain teasers?

Before you explore our examples, you might be wondering what brain teasers actually are.

Cambridge Dictionary defines a brain teaser as “a problem for which it is hard to find the answer, especially one which people enjoy trying to solve as a game.”

Brain teasers are a type of puzzle — and as the list below reveals, they come in many different forms. Often presented as a riddle, question or activity, brain teasers require a little extra brainpower to solve.

It's important to note that if you have any English language learners in your class, brain teasers for kids might pose a challenge for them. If that's the case, they might need you to walk them through the brain teaser more closely, or you can find ones that better suit their language level.

Brain teasers for kids differ from other complex or abstract problems because they’re usually done for fun. Although you can use them to analyze problem-solving and critical thinking skills, they’re often used as an amusing activity to encourage logical and lateral thinking , or thinking “outside the box.”

45 Brain teasers for kids

We’ve compiled a list of language, math and visual brain teasers to get your students thinking. Get inspired by the examples below — including answers!

Language brain teasers for kids

When you hear the term “brain teaser,” a riddle is likely the first thing that comes to mind. Riddles are perplexing — sometimes misleading — questions or statements that require creative thought to solve.

Riddles are usually fun, and plenty of them can add some humour to your classroom.

Enjoy our list of riddles for kids below!

a) Billy’s mother had five children. The first was named Lala, the second was named Lele, the third was named Lili, the fourth was named Lolo. What was the fifth child named?

b) Choose the correct sentence: “The yolk of the egg is white” or “the yolk of the egg is white.”

c) It’s as light as a feather, but the strongest person can’t hold it for more than five minutes. What is it?

d) The more there is, the less you see. What is it?

e) What gets more wet while it dries?

f) You can find it in Mercury, Earth, Mars, Jupiter and Saturn, but not in Venus or Neptune. What is it?

g) It likes food, but water kills it. What is it?

h) What’s full of holes but can still hold water?

i) Which is heavier, a pound of feathers or a pound of rocks?

j) How far can a dog run into the woods?

k) You’re driving a city bus. At the first stop, three women get on. At the second stop, one woman gets off and a man gets on. At the third stop, two children get on. The bus is blue and it’s raining outside in December. What colour is the bus driver’s hair?

l) There are three houses. One is red, one is blue and one is white. If the red house is to the left of the house in the middle, and the blue house is to the right of the house in the middle, where’s the white house?

m) It’s at the center of gravity and you can find it in Venus, but not Mars. What is it?

n) What goes on four feet in the morning, two in the afternoon and three in the evening?  (This is from the classic myth,  Oedipus and the Riddle of the Sphinx )

o) What travels faster: heat or cold?

p) A man was walking in the rain in the middle of nowhere without a coat or an umbrella. He got soaked, but not a single hair on his head was wet. How can this be?

q) A cowboy rode into town on Friday. He stayed in town for three days and rode back out on Friday. How is this possible?

b) Neither. Egg yolks are yellow, not white!

f) The letter “R”

h) A sponge

i) Neither. Both weigh a pound!

j) Halfway. Once it reaches halfway, it’s running  out  of the woods.

k) Whatever colour your hair is. Remember, you’re driving the bus!

l) In Washington, D.C.

m) The letter “V”

n) A human. The times of day represent stages of human life. At the beginning of life, a baby crawls on four “feet.” As a person gets older, they walk on two feet. Later in life, a person will walk on three “feet” (two feet, plus a cane to help them walk).

o) Heat travels faster because you can catch a cold!

p) He was bald.

q) The horse’s name was Friday.

As a bonus, use these riddles to challenge preconceived notions and get students thinking about natural bias .

a) Two boxers are in a match scheduled for 12 rounds. (Pure boxing only - no kicking, UFC takedowns, or anything else). One of the boxers gets knocked out after only six rounds, yet no man throws a punch. How is this possible?

b) A father and son have a car accident and both are very injured. They are taken to separate hospitals for treatment. When the boy is taken in for an operation, the surgeon says, “I can’t do this surgery…. this boy is my son!” How is this possible?

a) The two boxers are women.

b) The surgeon is the boy’s mother.

2. Language associations

These brain teasers for kids explore the complexities of the English language. Use them to boost student knowledge of sounds, words, spelling, categorization and more.a)  Word association : find a word that associates with the following sets of words.

• Cake, swiss, cottage
• Glasses, screen, day
• Cream, cube, cap
• Knife, fly, cup

b) Find the mystery word . Replace the third letter of each word with a new letter to create a different word. When read vertically, the new letters will reveal the mystery word.

For example, the word MA K E could become MA R E, MA L E, MA T E and so on. It’s your job to figure out which one works to create the mystery word. 

Hint: It’s something you’ll find outside.

c) Find rhyming pairs . Unscramble the words below so that each pair of words rhymes.

• RBAE & HREAS
• WNROED & UTRHNDE
• TUGHAT & HBTUGO
• ODULC & ODOG

Mystery word: FLOWER

• BEAR (or BARE) & SHARE
• WONDER & THUNDER
• TAUGHT & BOUGHT
• COULD & GOOD

You can also use printable brain teasers for kids like this one:

Image source: Spelling Words Well

Answer: The “happy word” is SMILE.

3. Lateral thinking problems

Lateral thinking problems require creative thinking with an indirect approach.

These questions require logic and careful thought to solve. The most notable example of a lateral thinking problem is the classic Monty Hall problem .

Here are two examples of lateral thinking problems kids can try to solve.

a) The river crossing problem

Image source: Popular Mechanics

A farmer is travelling with a fox, a goose, and a bag of beans. During his journey, he comes across a river with a boat to cross it.

The farmer can only fit one thing in the boat with him at a time. If left alone together, the fox will eat the goose or the goose will eat the beans. How does the farmer get everything across the river safely?

b) The light bulb problem

There are three light switches outside of a room-- labeled number one, number two, and number three. The door to the room is closed and you can’t see in. All three switches are off.

You need to figure out which switch belongs to which bulb. You can use the switches however you want to, but can only enter the room once. How do you do it?

a) Here’s the step-by-step solution:

• The farmer brings the goose across the river first (if he leaves the goose alone, it will either eat the beans or be eaten by the fox).
• The farmer brings either the fox or the beans across and leaves the other one alone.
• Now the farmer has two items on the other side of the river, including the goose. If he leaves the goose again, the same problem will occur. So, the farmer must bring the goose back to the other side.
• The farmer brings the other item back (either the fox or the beans) and leaves the goose alone again. The fox and the beans are now on the other side of the river.
• The farmer returns and brings the goose across the river again.

b) Turn on the first switch and leave it on. Turn on the second switch for a few minutes, and then turn it off again. When you enter the room, one light bulb will be on. You’ll know it goes with switch one because you turned it on. Another bulb will be hot. You’ll know that goes with switch two because it was on for a little while. The bulb that’s off and cold goes with switch three because you didn’t touch it.

Like math puzzles , these brain teasers for kids can increase engagement with math content and inspire your students to work on math concepts and problems outside of regular lessons.

1. Math riddles

These riddles are just as amusing as the ones above, but they’re math-focused . Use them to give students some extra math practice and encourage resourceful thinking.

Math riddles

a) Divide 30 by ½ and add 10. What’s the answer?

b) A clerk at the butcher shop is six feet tall and wears size 10 shoes. What does he weigh?

c) A farmer has 19 sheep on his land. One day, a big storm hits and all but seven run away. How many sheep does the farmer have left?

d) Your sock drawer only contains 18 white socks and 18 blue socks. How many times do you need to reach inside the drawer and take out a sock to guarantee a matching pair?

e) You planted sunflower seeds in your back garden. Every day, the number of flowers doubles. If it takes 52 days for the flowers to fill the garden, how many days would it take for them to fill half the garden?

f) Using only addition, how can you use eight eights to get the number 1,000?

g) When Ashley was 15, her mother was 37. Now, her mother is twice her age. How old is Ashley?

a) It's 70. You’re dividing 30 by ½, not by two. Thirty divided by ½ is the same thing as multiplying it by two, which is 60. Plus 10 makes 70!

b) Meat. He works at the butcher shop, so he weighs meat for a living.

c) Seven. The riddle says  all but seven  run away, meaning there are seven left who didn’t.

d) Three times. On the third time, you’ll get either a white or a blue sock to match with one of the other two you’ve already grabbed.

e) It would take 51 days. If the number of flowers doubles every day, half the garden would be full the day before, on the 51st day.

f) 888 +88 +8 +8 +8

g) Ashley is 22. Her mother is 22 years older, so when Ashley is 22, she’s now half her mother’s age.

2. Pattern problems

These questions require students to identify a pattern before they can answer a particular question. Kids must use creative and logical thinking to find the answers.

4 + 4 = 168

5 + 5 = 2510.

b) What makes this number unique: 8,549,176,320?

c) Solve the pattern puzzle below. Find the missing number to replace the question mark.

Image source: Genius Puzzles

d) Solve the following:

Image source: AOL

a) The missing number is 3612. The answer is the number multiplied by itself and then the number added to itself. Six multiplied by six is 36, and six plus six is 12.

b) It contains each one-digit number, zero through nine, listed in alphabetical order.

c) The missing number is 17. Each number in the circle is the sum of the numbers in the opposite quadrant. In this case, the numbers are eight and nine — added together makes 17.

d) The answer is 14 (or 16), if you’re on the other side of the debate .

3. Prodigy Math Game

This math activity is a bit different from others on the list. It’s not a traditional brain teaser, but it can also be used as a fun, skill-building alternative to traditional math class.

Prodigy is a game-based learning platform that takes your students on an online fantasy adventure while they answer standards-aligned math questions. It’s engaging and effective at teaching necessary skills. 

Prodigy's free teacher tools help you differentiate learning, send assessments in-game and even collect student insights!

Visual brain teasers for kids

1. spot the difference.

This ever-popular activity might remind you of your own childhood — and kids still love it! Spot the difference puzzles require lots of deduction and attention to detail.

Here’s an example of a printable spot the difference activity.

Image source: Tim’s Printables

2. Rebus puzzles

A rebus is a visual word puzzle that uses lateral thinking to find its intended meaning. The word or phrase is depicted with a visual illustration, including letters and words. Students must think creatively to figure out the meaning from the clues they’re given. 

Image source: Wikipedia

Image source: Stack Exchange

a) Top secret

b) Think outside the box

Visit the link below if you want more fun rebus puzzles for your students:

3. Optical illusions

Get tricky with your students! Optical illusions use visual tricks that alter the perception of what you’re really seeing. Students will love trying to figure out what’s really going on in these examples.

a) How many legs does the elephant have?

Image source: Optics For Kids

b) Are the two squares different colours?

Image source: Brain Den

b) They’re exactly the same colour. If you place your finger over the spot where the squares meet, you can see they’re the same. Try this impossible paper puzzle if you want a more hands-on optical illusion. You can make one to show your class, then have students make their own as a fun brain teaser to show friends and family.

4. Stroop effect test

The Stroop effect was discovered in the 1930s by John Ridley Stroop. During the test, you’re given a list of colour names, with each word being a different colour than what they describe.

The test involves saying the colour of a word, rather than reading the word itself. Your mind must process the two conflicting pieces of information, which slows down reaction speed and requires careful thought to get through.

Image source: The Crafty Classroom

Benefits of brain teasers for kids

You know your students enjoy them, but did you know there are plenty of additional reasons to make brain teasers a regular activity in the classroom?

A study on the attention spans of six-year-olds found children who were given brain teasers were more attentive than those who were not — showing brain teasers were effective at boosting children’s attention spans.   

Brain teasers for kids can also:

• Strengthen problem solving and critical thinking skills
• Encourage lateral thinking and build new perspectives
• Improve cognitive abilities like memory and processing speed
• Inspire teamwork and communication
• Engage students and motivate them to learn
• Provide necessary breaks from traditional class work

How to use brain teasers in the classroom

In addition to their many learning advantages, brain teasers are a great way to break up the day and engage your students. Here are just a few ways you can use brain teasers for kids as a teaching strategy and maximize the benefits in your classroom:

• Engagement-boosting activity before or after lessons
• Bonus questions in assignments and tests
• Optional “free time” activity
• Encourage team building — split students into groups to solve them together
• Supplement lessons — choose brain teasers about the subject you’re teaching

Final thoughts on brain teasers for kids

No matter what subject or skill you want to focus on, a brain teaser is a great addition to traditional teaching methods. Plus, it’s something students will actually be excited to do.

Remember that brain teaser are designed to be fun for kids. it’s not about finding the right answer, but the mental exercise they get from trying to find the solution.

Use any of the brain teasers in this list whenever you need a boost of energy in your classroom. Bonus points if you can stump any adults!

Create or log in to your free teacher account on Prodigy – a game-based learning platform for math that’s easy to use for educators and students alike. Aligned with standards across the English-speaking world, it’s used by more than a million teachers and 90 million students.

• Our Mission

10 Brilliant Math Brain Teasers

Tap into rigorous problem-solving and critical thinking with these playful math brain teasers for middle and high school students.  

To break the ice during the first few awkward moments of class in the new school year, high school math teacher Lorenzo Robinson uses an unusual strategy: He reads his students’ minds.

Here’s how the mystical feat unfolds: Each student picks a number between 1 and 100. Next, they use calculators to add, subtract, multiply, and divide their way through a set of predetermined numbers. At the end, everyone ends up with the same answer: 427. Robinson isn’t psychic, of course, but because the mechanics of the teaser are always the same, regardless of which initial numbers his students select, he’s able to correctly “guess” their final result—much to their amazement. 

Starting off the lesson with a math brain teaser sets a playful tone and lowers the stakes for kids, “generating a buzz around my class,” Robinson says. “It makes students feel as though this class is not going to be scary, it’s going to be interesting. ‘We’re going to be learning, but we’re also going to have some fun.’” 

Robinson thinks of math brain teasers as a variation on brain breaks —a brief respite from dense curricular material that gives kids time to pause and process. They can also provide an opportunity to build relationships and community as kids put their heads together to find solutions. Good brain teasers can be sneaky: They get kids developing problem-solving and critical thinking skills. 

Meanwhile, before introducing a new one, Robinson works through the problem himself, identifying questions that students might have along the way and making sure his class has the background knowledge to understand how the teaser works. It’s important, he says, to provide a few minutes for kids to examine and discuss the teaser. Ask them to observe, highlight, and share things that stand out. 

“The most powerful reaction is when a kid doesn’t get the correct answer,” Robinson says, and they ask to try the problem again. “They want to feel what the other kids are feeling, that educational euphoria. They want to do it again because they want to be right.” That organic intellectual curiosity is hugely helpful in high school math, Robinson says, because it can be “parlayed into the other stuff that we do.”

We combed through dozens of math brain teasers to find 10 good ones—including several of Robinson’s tried-and-true favorites.  

Number Magic: I’ll Bet Your Number is… 427

• Start by having students pick any number between 1 and 100. 
• Add 28. 
• Multiply that number by 6. 
• Subtract 3. 
• Divide that number by 3. 
• Subtract 3 more than your original number. 
• Add 8. 
• Subtract 1 less than your original number. 
• Multiply that number by 7. 

And voilà, you’ll correctly identify each student’s final result as 427. Courtesy of: Lorenzo Robinson  

Can Your Shoe Size Tell Your Age? 

• Start with your shoe size. If you are a half size—for example, size 8.5—round up to 9.
• Multiply your shoe size by 5. 
• Add 50. 
• Multiply that number by 20. 
• Subtract the year you were born—for example, 1991. Add 1 if you already had your birthday this year. 

The first digit(s) are your shoe size, and the last two digits are your age.  Courtesy of: Lorenzo Robinson.  

Cutting Across a Cross

Ask students to draw a cross on a sheet of paper. Drawing one on the board as a point of reference is helpful. Next, ask students to draw two straight lines that will segment or cut the cross into pieces. The goal is to produce the most pieces.

The solution can be found here .  Sourced from: MathisFun.com .

Number Magic: I’ll Bet Your Final Number is… 5  

• Start with a positive number. Students shouldn’t say the number out loud.
• Square that number. 
• Add 10x the original number to what you have now. 
• Add 25 to the result of the previous step. 
• Now take the square root of that number, rounding to the nearest whole number. 
• Subtract your original number.
• Before students share their final figure, reveal that you guess their collective result is 5. 

Courtesy of: Lorenzo Robinson.

Birthday Math 

Have students work in pairs and share the following instructions with their partner:

• Start with the number 7.
• Multiply that by the month of your birth. For example, if you were born in September, you’d use the number 9 to represent your birth month. 
• Subtract 1. 
• Multiply that number by 13. 
• Add the day of your birth. 
• Add 3. 
• Multiply that number by 11. 
• Subtract the month of your birth. 
• Subtract the day of your birth. 
• Divide by 10.
• Add 11 to that number. 
• Divide by 100. 

The result on the calculator screen should be their partner’s birthday.  Sourced from: Dr. Mike’s Math Games for Kids .

Coin Conundrum

Ask students to imagine that they have two coins that total 30 cents in value. Have them try to figure out what the two coins are, only providing them with a singular piece of information: One of the coins is not a nickel. The answer: A quarter and a nickel. (Only one of the coins is not a nickel.)

Sourced from: WeAreTeachers .

The Phone Number Trick  

• Ignoring your area code, type the first three digits of your phone number into a calculator.
• Multiply that number by 80. 
• Add 1. 
• Multiply that number by 250. 
• Add the last four digits of your phone number. 
• Add the last four digits of your phone number again. 
• Subtract 250. 
• Divide this number by 2. Do you recognize your phone number?

Courtesy of: Lorenzo Robinson. 

A Number Challenge

For a slightly more independent teaser, challenge students to produce a math equation that works using these four numbers—2, 3, 4, and 5—as well as a plus (+) and equal sign (=). Students can work individually, in pairs, or in small groups as they try to create a valid equation. The answer: 2 + 5 = 3 + 4.

Sourced from: WeAreTeachers .  

Math Mind Reader 

Students can work in pairs with this teaser. One person will start off by holding the calculator so their partner cannot see it; the other person can read the steps aloud to the partner with the calculator. 

• The student with the calculator starts by choosing a whole number from 1 to 20 and writing it down on a piece of paper without letting their partner see it. 
• Next, the student with the calculator enters their secret number into the calculator. 
• Multiply that number by 3. 
• Add the secret number, then subtract 5. 
• Multiply by 3, then multiply by 3 again. 
• Add the secret number, then subtract the number of their favorite month (you don’t have to know what month it is). For example, 9 represents the ninth month of the year, September. 
• Multiply by 3, then multiply by 3 again, and then again a third time. 
• Add the secret number, then subtract their favorite day of the month (again, you don’t have to know what it is on your end). 
• Ask them to show the non-calculator partner the result. At this stage, the non-calculator partner can guess the original secret number, even though what appears on the screen may be a very large number. 

If the result is negative, their secret number is 1.

If the result has only three digits, their secret number is 2.

In all other cases, ignore the last three digits, and then add 2 to get the secret number! 

Sourced from: Dr. Mike’s Math Games for Kids .

What’s Unique About This Number?

After writing the number 8,549,176,320 on the board, ask students to observe the number and tell you everything they think is unique about the number.

Answer: It is the digits 0 to 9 in alphabetical order (eight, five, four, nine, one, seven, six, three, two, zero), but it’s surprising and fun to see what students come up with. This number can also be evenly divided by the digits 1 through 9 except for the number 7, for example. 

Sourced from: MathisFun.com . 

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Puzzles Questions

What are puzzles.

Puzzle in simple terms is defined as a problem designed to test ingenuity or knowledge. They have become an integral part of few competitive exams and entrance tests. They are devised with intent to test the knowledge of to-be-solver.

What are different types of puzzles?

There are different types, which are devised with a specific intent to test a person’s ability to interpret and solve the problem. Different type of puzzles are :

• Missing letter

What exams have puzzles?

Almost every competitive exams have puzzles. They are most commonly found in competitive exams like : CAT, MAT, XAT, Bank P.O.s, AIEEE, GATE, TOEFL, GRE, and GATE etc. In these exams, mostly arithmetic, math, number, and logic puzzles.

How to solve puzzles?

To solve, one needs to interpret the questions properly and understand the sequence in the problem Is designed. By understanding the sequence, it becomes easier to solve a problem. Understanding the sequence of a puzzle requires strong logical ability and a creative thought pattern. The key is to solve as many different puzzles as possible to improve the thought process and gain expertise over different ways of solving a problem.

Clock puzzles

Logic puzzles, math puzzles, missing letters puzzles, number puzzles, word puzzles.

How many times in a day, are the hands of a clock in straight line but opposite in direction?

The Hardest Logic Puzzle Ever?

If a giraffe has two eyes, a monkey has two eyes, and an elephant has two eyes, how many eyes do we have?

Here in the question, it is asked how many Eyes We have so that means here the person who has asked the question is also including the person who is suppose to give the answer. In a clear understanding, the Conversation is happening between 2 people 1st who asked the question and 2nd to whom it has been asked, which means there are 4 eyes.

View Answer Report Error Discuss Filed Under: Logic Puzzles Exam Prep: AIEEE , Bank Exams , CAT , GATE , GRE Job Role: Analyst , Bank Clerk , Bank PO , Database Administration , IT Trainer

Crack the code & Unlock the Key ?

From all the hints given, 

only 042 satisfies and it unlocks the key.

View Answer Report Error Discuss Filed Under: Number Puzzles Exam Prep: AIEEE , Bank Exams , CAT , GATE Job Role: Bank Clerk , Bank PO

Find the missing Number?

7*6 = 4 2 9*9 = 8 1 5*3 = 1 5 6*2 = 1 2

View answer Workspace Report Error Discuss Subject: Number Puzzles

The hands of a clock point in opposite directions (in the same straight line) 11 times in every 12 hours. (Because between 5 and 7 they point in opposite directions at 6 o'clcok only).

So, in a day, the hands point in the opposite directions 22 times.

View Answer Report Error Discuss Filed Under: Clock puzzles

Solve the Logical Puzzle ?

View Answer Report Error Discuss Filed Under: Logic Puzzles Exam Prep: AIEEE , Bank Exams , CAT , GATE , GRE Job Role: Bank Clerk , Bank PO

How many squares do you see?

Number of squares in the given figure is

16 + 9 + 19 + 1 = 45.

View Answer Report Error Discuss Filed Under: Math Puzzles Exam Prep: AIEEE , Bank Exams , CAT , GRE , TOEFL Job Role: Analyst , Bank Clerk , Bank PO , Database Administration , IT Trainer , Network Engineer , Project Manager

A clock is started at noon. By 10 minutes past 5, the hour hand has turned through:

Angle traced by hour hand in 12 hrs = 360º.

Angle traced by hour hand in 5 hrs 10 min.   i.e., 31/6 hrs  =  360 12 * 31 6 ° = 155º

90 D in a R A

90 D in a R A => 90 degrees in a Right Angle.  

This is similar to 

26 L of the A =  26 Letters of the Alphabet

12 S of the Z .

View answer Workspace Report Error Discuss Subject: Logic Puzzles Exam Prep: GRE , GATE , CAT , Bank Exams , AIEEE Job Role: Network Engineer , IT Trainer , Database Administration , Bank PO , Bank Clerk , Analyst

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40 riddles and brain teasers to test your general knowledge

Try out some of the best riddle quiz questions around, as well as some tricky brain teasers

• 15:58, 12 MAY 2020
• Updated 09:00, 25 JAN 2023

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Think you are a bit of a genius problem solver? Then have a go at our challenging riddles and tricky brain teasers.

You may already think you're a know-it-all when it comes to quizzes but this is a whole different ball (or mind) game. So if you are up to the test why not get your brain in action with our 40 questions and answers below.

We have put together a hefty list of some of the best and hardest riddles and teasers around, just for you to try out. Some of them may seem simple but don't be fooled, they will leave you pulling your hair out until you know the answers.

So, whether you’re a riddle wizard or fancy trying something new we have all the top teasers and answers all in one place. Scroll down below to put your mind’s puzzle power to the test.

1. What is always in front of you but can’t be seen?

2. What can you break, even if you never pick it up or touch it?

3. I have branches, but no fruit, trunk or leaves. What am I?

4. What can you catch, but not throw?

5. What has to be broken before you can use it?

6. I’m tall when I’m young, and I’m short when I’m old. What am I?

7. What goes up but never comes down?

8. The more of this there is, the less you see. What is it?

9. What can travel all around the world without leaving its corner?

10. What question can you never answer yes to?

11. What is so fragile that saying its name breaks it?

12. What has 13 hearts, but no other organs?

13. What can run but never walks, has a mouth but never talks, has a head but never weeps, has a bed but never sleeps?

14. What can fill a room but takes up no space?

15. What has one eye, but can’t see?

16. If you drop me I’m sure to crack, but give me a smile and I’ll always smile back. What am I?

17. The more you take, the more you leave behind. What are they?

18. What breaks yet never falls, and what falls yet never breaks?

19. I am always hungry and will die if not fed, but whatever I touch will soon turn red. What am I?

20. What has one head, one foot and four legs?

21. The person who makes it has no need of it; the person who buys it has no use for it. The person who uses it can neither see nor feel it. What is it?

22. I have lakes with no water, mountains with no stone and cities with no buildings. What am I?

23. What has a head, a tail, is brown, and has no legs?

24. Can you name three consecutive days without using the words Monday, Tuesday, Wednesday, Thursday, Friday, Saturday, or Sunday?

25. What begins with an “e” and only contains one letter?

26. What belongs to you, but other people use it more than you?

27. What can point in every direction but can't reach the destination by itself.

28. What has many keys, but can't even open a single door?

29. A man rode out of town on Sunday, he stayed a whole night at a hotel and rode back to town the next day on Sunday. How is this possible?

30. What has six faces, but does not wear makeup, has twenty-one eyes, but cannot see? What is it?

31. This is as light as a feather, yet no man can hold it for long. What am I?

32. What runs around the whole yard without moving?

33. The more you take away, the more I become. What am I?

34. I have two hands, but I can not scratch myself. What am I?

35. Poor people have it. Rich people need it. If you eat it you die. what is it?

36. What goes up when the rain comes down?

37. I have no feet, no hands, no wings, but I climb to the sky. What am I?

38. If you have me, you want to share me. If you share me, you haven't got me. What am I?

39. I am full of holes but I can still hold water. What am I?

40. I can be cracked, I can be made. I can be told, I can be played. What am I?

1. The future

2. A promise

6. A candle

7. Your age

8. Darkness

10. Are you asleep yet?

11. Silence

12. A deck of cards

13. A river

15. A needle

16. A mirror

17. Footsteps

18. Day, and night

21. A coffin

23. A Penny

24. Yesterday, Today, and Tomorrow

25. An envelope

26. Your name

27. Your finger

28. A piano

29. His horse was called Sunday

31. Your breath

32. A fence

34. A clock

35. Nothing

36. An umbrella

38. A secret

39. A sponge

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Puzzle Up Minds: Brain Teaser Questions for Kids and Adults

Rebekah Pierce

Are you on the lookout for an enjoyable and beneficial way to stimulate your child’s mind? Incorporating brain teaser questions into their playtime is not only fun but also enhances critical thinking and problem-solving skills.

This compilation of brain teasers for children does more than keep them engaged—it prepares them for life’s bigger puzzles. From easy math riddles to the casual word puzzle, there are all kinds of games people can play to enjoy life’s greatest mysteries.

Let’s have fun with it!

50 Brain Teaser Questions for Kids

Funny brain challenging questions for adults.

Here’s a curated selection of teasers that are perfect for kids. Whether in the classroom or at home, these quirky and clever quiz questions will leave your little ones feeling both perplexed and enlightened!

• I’m tall when I’m young, and I’m short when I’m old. What am I? A candle.
• What has keys but can’t open locks? A piano.
• What can you catch, but not throw? A cold.
• Which month has 28 days? All of them, of course!
• If you have me, you want to share me. If you share me, you haven’t got me. What am I? A secret.
• I come down, but I never go up. What am I? Rain.
• What has a head and a tail, but no body? A coin.
• You see a boat filled with people. It has not sunk, but when you look again you don’t see a single person on the boat. Why? All the people were married!
• What is full of holes but still holds water? A sponge.
• What begins with T, finishes with T, and has T in it? A teapot!
• If two’s company and three’s a crowd, what do you call four? A party!
• What has keys but can’t open locks? A piano!
• What has wheels and flies, but is not an aircraft? A garbage truck!
• I speak without a mouth and hear without ears. I have no body, but I come alive with the wind. What am I? An echo!
• What comes once in a minute, twice in a moment, but never in a thousand years? The letter “M”!
• What gets wetter as it dries? A towel!
• What has a neck but no head? A bottle!
• What has hands but cannot clap? A clock!
• The more you take, the more you leave behind. What am I? Footsteps!
• What has many keys but can’t open a single lock? A computer keyboard!
• What has cities but no houses, forests but no trees, and rivers but no water? A map!
• What has one eye but can’t see? A needle!
• What has branches and leaves but no bark? A library!
• What has keys that open no locks, space but no room, and allows you to enter but not to go in? A keyboard!
• I am taken from a mine and shut up in a wooden case, from which I am never released, and yet I am used by almost every person. What am I? Pencil lead!
• I’m tall when I’m young and short when I’m old. What am I? A candle.
• What has a neck but no head, and two arms but no hands? A shirt!
• What has a thumb and four fingers but is not alive? A glove!
• I begin and end with the letter ‘E’ but only contain one letter. What am I? An envelope. 
• You see me once in June, twice in November, but not at all in May. What am I? The letter ‘E.’
• The more you take away from me, the bigger I get. What am I? A hole.
• What can travel around the world while staying in a corner? A stamp.
• A man who was outside in the rain without an umbrella or hat didn’t get a single hair on his head wet. Why? The man was bald.
• It belongs to you, but other people use it more than you do. What is it? Your name.
• You’ll find me in Mercury, Earth, Mars, and Jupiter but not in Venus or Neptune. What am I? The letter ‘R.’
• You walk into a room with a match, a kerosene lamp, a candle, and a fireplace. Which do you light first? The match.
• What breaks yet never falls, and what falls yet never breaks? Day breaks and night falls.
• I am not alive, but I can grow; I don’t have lungs, but I need air; I don’t have a mouth, but water kills me. What am I? Fire.
• What goes through cities and fields, but never moves? A road.
• A man dies of old age on his 25 birthday. How is this possible? He was born on February 29th.
• What has a bottom at the top? Your legs.
• There’s a one-story house where everything is yellow. Yellow walls, yellow doors, yellow furniture. What color are the stairs? There aren’t any—it’s a one-story house.
• What invention lets you look right through a wall? A window.
• What five-letter word becomes shorter when you add two letters to it? Short (+ ‘er’).
• What has many teeth but can’t bite? A comb.
• If you throw a blue stone into the red sea, what will it become? Wet.
• What four-letter word can be written forward, backward, or upside down, and can still be read from left to right? NOON.
• They fill me up—but you empty me almost every day. If I raise my arm, I work the opposite way. What am I? A mailbox. 
• I have a big mouth and I’m really loud. I’m not a gossip, but I like to get involved in everyone’s dirty business. What am I? A vacuum cleaner. 
• What’s harder to catch the faster you run? Your breath. 

Are you looking for even more fun brain teasers and riddles for kids? Check this blog section !

Even adults can get in on the brain-teasing fun! Get ready for an uproarious and thought-provoking journey with these funny brain challenging questions designed specifically for adults.

Whether you’re at a social gathering, on a long road trip, or just looking for a mental workout, these brain teasers will entertain and challenge you in equal measure.

Here are some riddles that are a bit more advanced, perfect for parents who want to challenge themselves alongside their kids.

• What has a heart that doesn’t beat? An artichoke.
• What three numbers, none of which is zero, give the same result when added and multiplied together? One, two, and three. (1 + 2 + 3 = 6 and 1 x 2 x 3 = 6)
• If you’re running a race and you pass the person in second place, what place are you in? Second place.
• I am an odd number. Take away one letter, and I become even. What number am I? Seven (remove the ‘s’ to make ‘even’).
• Using only addition, how can you add eight 8’s to get the number 1,000? 888 + 88 + 8 + 8 + 8 = 1,000.
• What is so fragile that saying its name breaks it? Silence.
• Forward I am heavy, but backward I am not. What am I? The word ‘ton’.
• A man looks at a painting in a museum and says, “Brothers and sisters, I have none. But that man’s father is my father’s son.” Who is in the painting? The man’s son.
• What is 3/7 chicken, 2/3 cat, and 2/4 goat? Chicago.
• A woman shoots her husband, then holds him underwater for five minutes. Next, she hangs him. Right after, they enjoy a lovely dinner. How? The woman took a picture of her husband (shot), developed it (in liquid), and then hung it up to dry.
• You will buy me to eat but never eat me. What am I? Plates or cutlery.
• I fly without wings. I cry without eyes. Whenever I go, darkness flies. What am I? Clouds.
• Which letter of the alphabet has the most water? The ‘C’.
• A doctor and a bus driver are in love with the same woman. The bus driver has to go on a week-long trip and before he left, he gave her seven apples. Why? An apple a day keeps the doctor away!
• What is special about these words: herb, polish, job? They are pronounced differently when the first letter is capitalized. 
• I can’t be purchased, but I can easily be stolen with just a glance. I’m worthless to one person, but priceless to two. What am I? Love.
• No matter how little or how much you use me, you have to change me every month. What am I? A calendar. 
• Shoot me a thousand times, and I might still survive. But one scratch and your prospects will take a dive. What am I? An eight ball. 
• In 1990, a man was 15 years old. In 1995, that same person was 10 years old. How could this possibly be? The man was born in 2005 B.C.
• For parents seeking a mental challenge in ensuring their kids’ safety, what app do they often consider? The Findmykids app !

As we conclude our exploration of brain teaser questions for kids, it’s important for all of us, for parents and educators alike, to recognize the power these cognitive exercises possess.

They’re more than just riddles—they’re teaching tools that promote creative thinking, build concentration, and foster a love for learning.

By presenting these brain teasers in a fun and approachable manner (not as a tough interview!), we can encourage our children to embrace challenges and enjoy the thrill of finding solutions.

So share these brain teasers, laugh at the quirky answers, and watch your child’s intellectual curiosity and abilities grow!

What are some good brain questions?

Good brain questions are typically ones that challenge thinking, require logic, and provoke creativity. Examples include logic puzzles, pattern recognition exercises, and lateral thinking questions.

What is an example of a brain teaser question?

An example of a brain teaser question is: “What has to be broken before you can use it?” The answer is an egg.

What’s a trick question to ask someone?

A trick question might have an unexpected answer that plays on words, such as: “If a plane crashes on the border of the United States and Canada, where do they bury the survivors?” Trick questions usually hinge on people not listening carefully—of course, survivors aren’t buried!

What are big brain questions?

Big brain questions often involve complex problem-solving or deep philosophical queries like, “Why does anything exist?” or “What is the nature of consciousness?” These questions are designed to push the boundaries of understanding and encourage profound thinking.

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Challenging brain teasers with solutions: long list.

This is a rather long list of challenging brain teasers with solutions. The brain teasers are hand-picked and solutions focus on systematic problem solving.

Know how to solve difficult problems easily without wasting time on random attempts

Our ebook on puzzle solutions by innovative methods will show you just that.

Puzzles for Adults: 50 Brain Teasers with Step-by-Step Solutions: Boost Your Power of Problem Solving

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BUY the never before eBook Amazon Kindle version here , from Google Play here and Paperback here .

We are happy to announce on early morning 15th July, 2022 (IST) that the book has been labeled as number 1 new release in puzzles category in Amazon Kindle store in USA marketplace on its 14th day of release.

Second book on Innovative Solutions to Matchstick Puzzles from Suresolv

BUY Creative Matchstick Puzzles Innovative Solutions eBook Amazon Kindle version

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Puzzles and Riddles That You Will Find Interesting

It is a growing list of puzzles and riddles that I felt attracted to and solved. The puzzles belong to all major categories. Each puzzle is divided into two parts - the puzzle and its solution.

A solution focuses on each little step of thought that leads to the solution. And it relies heavily on problem solving strategies and techniques as well as reasoning . Reasoning is my favorite topic - there is so many types and forms of reasoning!

Problem solving techniques are merrily used. But these days, that is during last part of 2021, I favor Question, answer and analysis technique to crack many hard nuts.

Enough of monologue. Go ahead. Taste for yourself. Who is not fond of challenging brain teasers!

Quick jump links to the categories are,

Mathematical puzzles

Logic puzzles, river crossing puzzles, ball weighing puzzles.

• Matchstick puzzles.

Just click on any of the above links to go through the particular category chosen and to return click on your browser back button.

These are the puzzles that I couldn't categorize comfortably. Usually a riddle is small having a small number of key mysteries to unravel. But you will find some of the riddles not easy to conquer.

Two jugs riddle

The tramcar reunion riddle

Riddle of 4 persons crossing a bridge over a river at night

Three boxes riddle

Can You Solve the PROBLEMSOLVING Repetition Riddle?

Airplane riddle of flying around the world

Riddle of lying and truth-telling twins

Two jugs riddle of delivering 1 quart of milk each

How could Sonia sell half a poodle riddle

Transfer a pile of 15 numbered discs riddle

Two burning ropes timer riddle

Riddle of four coins touching

Pick up in turns riddle

Devotee and three temples riddle

Big game hunting riddle: How many animals were bagged?

Knight and calculator keypad riddle

Riddle of all around handshakes in a dinner party

Open the lock riddle with 682 in clues

Connect the nine dots riddle: step by step solution

Open the lock riddle with 154 in clues

Number lock puzzle: Can you crack the code?

Two circles and a line riddle: can you traverse?

The ten barrel face number puzzle

Stepping stone crossing riddle step by step solution

Odd numbered and even numbered piles riddle

Make a circular chain riddle

Catch the cat hiding in 5 boxes riddle

4 digit number lock riddle: Can you crack the code

Remove discs from 10 touching discs riddle

Sharpen Your Thinking: Solve Day Before Two Days After Riddle

Matching Socks Puzzle: Pick Minimum Number of Socks

Four Persons Bridge and Torch River Crossing in 15 minutes Puzzle

Each of these puzzles is predominantly math heavy. Some amount of math you would surely need to solve a puzzle of this category.

But I have taken special care to keep the math simple (simply because I don't know complex math). Even such a hard one like Monkey and coconuts I have solved using Class ten level math that should be understood by most if not all.

Reverse cheque puzzle

Reverse cheque puzzle solution

Counting eggs puzzles based on Euclid's division lemma

Monkey and the coconuts puzzle with solutions

10 digit Conway number puzzle with solution

World's Hardest Easy Geometry Puzzle Solved with Techniques Explained Step by Step

Hard Algebra Puzzles Solved by Basic Exponent Concepts and Reasoning

Three squares in a triangle puzzle

3 digit number math puzzle

9 squares in a rectangle math puzzle

How many addition signs needed to make sum of 99

Solve 3 puzzles by solving only one: Domain mapping

Minimum number of heads with same number of hairs riddle

Playing card math puzzle

Change money math puzzle

Sharing a bicycle puzzle step by step solution

Ship carpenter's problem of plugging a square hole puzzle

Half and half money math puzzle

What is the weight of the fish?

The archery match math puzzle

The cat and mouse game with advisor dog

The puzzle of a purchase in the local market

Math Olympiad Question: Can You Solve in 5 minutes?

Cracking the Code: Solving the Changing Length Repetition Riddle

Just like math puzzles, these are logic heavy. I mean heavily dependent on formal logic that involves truth, falsity, implications and so on.

Though logic is a part of math only, in puzzles, logic demands a separate category. These are especially interesting.

Method based solution to Einstein's logic analysis puzzle, whose fish

How to solve Einstein's puzzle whose fish confidently, improved method based solution

Logic puzzle, When is Cheryl's birthday

Liar and truth-teller riddle with step by step easy solution

4 Prisoners and Hats Puzzle

Liar, Truth-teller, Random-answerer riddle

Flipping coins to heads or tails logic puzzle

Six wrong labeled bottles logic puzzle

Riddle of Name of the Engineer

Who wears which shirt color logic puzzle

Whose birthday on which day logic puzzle

4 logicians and 11 fish fries logic puzzle

Can You Solve the Tricky 3-letter Words Logic Puzzle? (3 Clues)

Sharpen Your Logic: Exercise Your Brain with These Fun Puzzles

Can you Crack the Lying and Truth-telling Lion and Unicorn Puzzle

Solutions to a Liar, Truth-teller Puzzle: Many Ways of Reasoning

This category has a small number of puzzles but these are highly popular and engaging ones.

Farmer with fox, goose and bag of corn crossing the river puzzle

Two pigs and two hens crossing river puzzle

3 monkeys and 3 humans crossing river puzzle

King queen minister washerman river crossing puzzle

Four friends river crossing puzzle in a 100 kg capacity boat

This is also a small category with only a few puzzles. But again these are of a kind as the saying goes.

None of these are easy to solve, but again not too hard to understand the solution also.

Find the heavier among 8 identical balls in 2 weighing puzzle

Find the fake ball among 8 identical balls in 3 weighing puzzle

Find the fake ball among 9 identical balls in 3 weighing puzzle

Find the fake ball among 12 identical balls in 3 weighing hard puzzle with solution

Matchstick puzzles

This is my favorite category and I always keep a large box of matchsticks within reach to play with when I feel the need.

It is a wonder how many engaging creations can be made with these innocuous little sticks!

Solution to 6 triangles to 5 triangles in 2 moves, first matchstick puzzle

Matchstick puzzle 5 squares to 4 squares in 2 moves

Matchstick puzzle 5 squares to 4 squares in 3 moves

Matchstick puzzle, Turn around the fish in 3 moves

Fifth Matchstick puzzle, Move 3 sticks in tic-tac-toe figure to form 3 perfect squares

Hexagonal wheel to 3 triangles by removing 4 sticks

Convert 5 squares to 4 squares in 3 stick moves, third 5 square matchstick puzzle

Matchstick Puzzle - Make the kite nose-dive in 5 stick moves

Make 5 squares from 6 in 2 stick moves - 6 square matchstick puzzle

Move 3 sticks and convert 5 squares to 4 squares in 4th 5 square matchstick puzzle

Move 3 sticks and convert 4 squares to 3 squares matchstick puzzle

Move 8 sticks and convert 5 squares to 2 squares matchstick puzzle

First Move 3 sticks and make 2 squares matchstick puzzle

Second Move 3 sticks and make 2 squares matchstick puzzle

Remove 2 matchsticks to leave 6 triangles puzzle

Add 3 matchsticks to make 4 triangles - lateral thinking stick puzzle

Move 1 stick to make 4 closed shapes each with 3 or 4 sides

Move 2 sticks to make 5 closed shapes matchstick puzzle

Move 2 to make 7 squares matchstick puzzle - solution based on problem solving and innovation model

Move 4 to turn the tower upside down Matchstick puzzle

Move 2 matches to make 6 squares and move 8 matches to make 6 squares - a pair of matchstick puzzles

Move 3 matches to take the cherry out of wine glass and move 2 matches to take the cherry out - a pair of matchstick puzzles

Move 6 matches to make 5 squares

Move 2 matches and add 1 to make 2 diamonds puzzle

Move 4 matches to make 5 triangles matchstick puzzle

Remove 4 matches to leave 4 equal triangles puzzle

Transfer 1 match in two matchstick groups puzzle

Move 3 matches to make 5 equal squares puzzle

Matchstick puzzle move 4 to make 10 squares

Matchstick puzzle Move 2 for form 11 squares

Move 2 matches to make 3 triangles

Remove 3 matches to leave 3 triangles

Add 9 matches to make 8 nodes

Move 3 matches to make 7 squares matchstick puzzle

Move 4 to make 6 squares matchstick puzzle

Move 4 matches to form 3 square area

Move 4 matches to make 4 squares matchstick puzzle

Move 2 matches to form 4 equal squares matchstick puzzle

Move 3 matches to create 3 squares of different sizes

Matchstick star puzzle - Move 2 matches to form 6 triangles

Move 2 matches to form 5 triangles from 6 triangles puzzle

Remove 3 and move 2 matches to form 3 squares puzzle

Enclose maximum number of triangles by 9 matchsticks

Remove 4 matches to leave 6 diamonds matchstick puzzle

Turn around the face of the pig in 2 moves puzzle

Add 10 matches to create 5 diamonds matchstick puzzle

Move 3 matches of 6 squares to create 5 squares puzzle

Turn the Westerly fish to Southerly swimming fish in 2 moves

Remove 5 matches to leave 5 squares matchstick puzzle

Move 4 matches to make 6 triangles matchstick puzzle

Remove 6 matches to leave exactly 2 squares puzzle

Move 3 matches to form 6 squares matchstick puzzle

Move 3 Matches to Form Exactly 3 Rectangles Puzzle

Move 4 matches to leave 2 triangles matchstick puzzle

Move 3 sticks to form six squares matchstick puzzle

Move 3 matches to form 2 large and 1 small triangle puzzle

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Critical Thinking and Decision-Making  - Using Brain Teasers to Build Critical Thinking Skills

Critical thinking and decision-making  -, using brain teasers to build critical thinking skills, critical thinking and decision-making using brain teasers to build critical thinking skills.

Critical Thinking and Decision-Making: Using Brain Teasers to Build Critical Thinking Skills

Lesson 4: using brain teasers to build critical thinking skills.

/en/problem-solving-and-decision-making/decisionmaking-strategies/content/

Using brain teasers to build critical thinking skills

Here's a brain teaser: A rooster is on the roof of a barn facing east. The wind is blowing to the west at 10 miles per hour. The rooster lays an egg. Which direction does the egg roll?

The answer appears below the image.

Answer: There is no egg. The rooster didn't lay one because roosters are male. Did you get it right? Let's pick this apart and see why so many people have difficulty with this brain teaser, and so many others.

Watch the video below to learn more about how you can use brain teasers to improve your critical thinking.

The answer is in the details

It's easy to overlook details or accept them without questioning. In the brain teaser above, the answer could be found in the second word: r ooster .

In hindsight, we realize it's impossible for roosters to lay eggs. But it's easy to overlook this when it's casually mentioned in the brain teaser.

Misdirection

Another process at work in this brain teaser is misdirection . There were several details included that we may have paid too much attention to: The fact that the rooster was facing east, and that the wind was blowing west at 10 miles per hour.

In the end, these details had nothing to do with the actual answer. However, they seemed important in the context of the brain teaser! This directed us away from the relevant information.

Applying these ideas to the real world

The same techniques we use to solve brain teasers can also be applied to real-world situations . When you're trying to figure something out, it's important to analyze the information that's available to you and ask the following questions:

• Are there any key details I may be missing?
• Am I being misled by something?
• Could I be thinking about this in another way?

Brain teasers not only help to keep your mind sharp, but can help improve your critical thinking skills as well.

Let's finish things off with another brain teaser...

You are in a dark room with a single match. The only objects available to you are a candle, an oil lamp, and a gas stove. Which item do you light first?

Answer: The match!

/en/problem-solving-and-decision-making/navigating-todays-health-crazes/content/

55 Fun Riddles for Kids of All Ages (and the Answers)

Including easy and hard riddles about animals, numbers, and food.

While some of the harder riddles on our list take a bit of thinking through, others opt for a humorous play on words that will leave kids giggling. Don’t be surprised if you find your little one reciting a riddle to their friends at school. Puzzle solving carries great street cred on the playground!

Riddle-solving is the perfect kids' activity for summer , spring, or winter break, too. It’ll help keep their mind sharp while out of school, and of course, bring a great deal of fun to their day. This is also a good activity for babysitters to do with kids. See how many answers they can guess. If it’s more than five, consider pushing back their bedtime by 15 minutes. A mini genius deserves to stay up an extra few minutes.

For more riddles and family games , check out our stories on riddles for adults , scavenger hunt riddles for kids , charades ideas , and two-player board games .

Animal Riddles for Kids

Hard riddles for big kids, funny riddles for young kids, food riddles for kids, clever riddles for kids, easy riddles for kids.

• Question : Why are teddy bears never hungry? Answer : Because they are always stuffed.
• Question : The more of me there is, the less you see. What am I? Answer : The dark.
• Question : What is a bunny’s favorite type of music? Answer : Hip-hop.
• Question : What is a turkey’s least favorite holiday? Answer : Thanksgiving.
• Question : What is a monster’s favorite dessert? Answer : I-Scream.
• Question : I have many keys but cannot open any doors. What am I? Answer : A piano.
• Question : What has hands but can’t clap? Answer : A clock.
• Question : How do you fix a cracked pumpkin? Answer : With a pumpkin patch.
• Question : I follow you all the time and copy your every move, but you can’t touch or catch me. What am I? Answer : Your shadow.
• Question : I have wings. I am able to fly. I'm not a bird, yet I soar high in the sky. What am I? Answer : An airplane.

• Question : How do you catch a school of fish? Answer : With a bookworm.
• Question : What is a frog’s favorite game? Answer : Leapfrog.
• Question : What is a rabbit’s favorite dance? Answer : The bunny hop.
• Question : What kind of lion never roars? Answer : A sea lion.
• Question : What is the funniest species of fish in the sea? Answer : The clownfish.
• Question : Why are bees great secret keepers? Answer : Because they mind their beeswax.
• Question : What type of dog is the most athletic? Answer : Boxers.
• Question : What animal can you never trust? Answer : A lion.
• Question : What fish costs the most? Answer . A goldfish!
• Question : What animal is the best at landscaping? Answer : Hedgehogs.

• Question : The more of me you take, the more you leave behind. What am I? Answer : Footsteps.
• Question : What element is not on the periodic table? Answer : The element of surprise.
• Question : Why are swimmers so great at school projects? Answer : Because they dive right in.
• Question : What belongs to you but is mostly used by others? Answer : Your name.
• Question : What kind of tree can you hold in your hand? Answer : A palm tree.
• Question : Why are ghosts so good at sports? Answer : Because they have team spirit.
• Question : You buy me to eat, but I am never eaten. What am I? Answer : A plate.
• Question : Four legs up, four legs down, soft in the middle, and hard all around. What am I? Answer : A bed.
• Question : I have no legs. I will never walk but always run. What am I? Answer : A river.

• Question : When things go wrong, what can you always count on? Answer : Your fingers.
• Question : Which letter of the alphabet is the worst to travel with? Answer : P, because they are always stopping to use the restroom.
• Question : What is a vampire’s favorite fruit? Answer : A blood orange.
• Question : What do you call a chihuahua in the summer? Answer : A hot dog!
• Question : What do you get when you cross a snowman with a vampire? Answer : Frostbite.
• Question : Why did the tortilla chip start dancing? Answer : Because they put on the salsa.
• Question : What did the mom tomato say to the dawdling baby tomato? Answer : “Ketchup.”
• Question : Why was the math book sad? Answer : Because it had a lot of unanswered problems.

• Question : What two things can you never eat for breakfast? Answer : Lunch and dinner.
• Question : What is a tree’s favorite drink? Answer : Root beer.
• Question : What kind of cake does a mouse eat on its birthday? Answer : Cheesecake.
• Question : Why do lemons never get invited to parties? Answer : Because they are always in a sour mood.
• Question : What can you buy from a grocery store for under $2 that will make you rich? Answer : A 100 Grand candy car.
• Question : What is a reptile's favorite drink? Answer : Gator-ade.
• Question : What is orange in color, green on top, and sounds like a parrot? Answer : A carrot!
• Question : What fruit can you never cheer up? Answer : A blueberry.

• Question : I am an odd number. Take away a letter, and I become even. What number am I? Answer : Seven.
• Question : If Mr. Red lives in the red house, and Mr. Blue lives in the blue house. Who lives in the White House? Answer : The president.
• Question : How many months have 28 days? Answer : All of them.
• Question : What building has the most stories? Answer : A library.
• Question : Which letter of the alphabet has the best eyesight? Answer : C.
• Question : What has a head and tail but no body? Answer : A coin.
• Question : What is at the end of a rainbow? Answer : The letter "w."
• Question : What word is spelled wrong in the dictionary? Answer : 'Wrong.'
• Question : What did the triangle say to the circle? Answer : You are pointless.
• Question : You see me once in June, twice in November, and not at all in May. What am I? Answer : The letter “e.”

Elizabeth Berry (she/her) is the Updates Editor at the Good Housekeeping Institute where she optimizes lifestyle content across verticals. Prior to this role, she was an Editorial Assistant for Woman’s Day where she covered everything from gift guides to recipes. She also has experience fact checking commerce articles and holds a B.A. in English and Italian Studies from Connecticut College.

Kate Franke (she/her) is the editorial assistant at Woman’s Day . She loves all things lifestyle, home, and market related. Kate has a BAJMC in Magazine Media and BA in Writing from Drake University. She is a proud ASME alum whose work has appeared in Food Network Magazine , The Pioneer Woman Magazine , Better Homes & Gardens , Modern Farmhouse Style , Beautiful Kitchens & Baths , and more. Next to writing, Kate’s two favorite things are chai lattes and pumpkin bread!

.css-2lr79s:before{top:1.4rem;left:calc(-50vw + 50%);width:100vw;height:0.0625rem;z-index:-1;content:'';position:absolute;border-top:0.0625rem solid #CDCDCD;} Puzzles and Brain Teasers

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30 Brain Teaser Interview Questions & Detailed Answers

If you have learned about consulting interviews, the term "Brain Teasers" is certainly familiar to you at some stage, however, are recruiters really using it in interviews or is this just a myth? According to a senior consultant/interviewer of McK and BCG, the use of brainteasers differs across the tiers:

• Not used in MBB
• Sometimes used in Tier 2 firms (Roland Berger, Oliver Wyman, etc.)
• Frequently used in Tier 3 firms (Arthur D. Little, etc.)

Brain Teasers are now being used less in interviews by consultants since they have recognized the limitations of brain teasers as an assessment tool and have shifted their focus to more practical case interviews that reflect the actual work of a consultant. 

However, not all consulting businesses share the same opinion. In fact, many consulting firms still utilize brainteasers to seek out candidates who are capable of thinking rationally and creatively under pressure. Hence, to best prepare for the interviews, you should learn something about this subject.

Table of Contents

What are Brain Teasers in Consulting Interviews?

Brain teasers are “trick questions”.

Brain teasers are puzzles or problems that require a candidate to use logic, creativity, and critical thinking to arrive at a solution . These quizzes come in various forms, such as math problems, logic puzzles, or situational challenges and also can be applied in a wide range of cases in different fields. 

Brain teasers aim to test the ability of people to think outside the box, analyze complex situations, and solve problems under pressure.

Brain teasers used to be important

According to former consultant of Accenture , brain teasers were used to be an important part of consulting interviews as they are not placed in a business setting so it can provide the company with insights regarding how applicants apply logic and creative thinking to solve problems outside of expertise areas. 

This can be necessary when assessing freshmen without much work experience, hence, it also allowed the employer to see how the candidates responded under pressure when confronted with a novel problem

Another reason is they provide a means of testing a candidate's analytical and problem-solving skills which is a critical skill for a consultant as they are often called upon to solve difficult business problems for their clients. They often involve a complex scenario or ambiguous problem that requires candidates to think outside the box or use data to make informed decisions. 

Additionally, brain teasers can also provide insights into a candidate's communication skills . Consulting firms tend to look for candidates who can not only solve complex problems but also communicate their thought process and reasoning successfully. 

As consultants must be able to convey their ideas to customers, coworkers, and stakeholders so the capacity to explain a solution succinctly and clearly is a requirement.

Examples of brain teasers used in consulting interviews

Examples of brain teasers used in consulting interviews vary in complexity and can range from simple math problems to more intricate logic puzzles. 

One example of a brain teaser is the "Three Light Bulbs Problem." In this scenario, a candidate is presented with a room containing three light bulbs and a single switch outside the room. 

The challenge is to determine which light bulb corresponds to which switch, using only one entry into the room.

Consulting firms may also present situational challenges as brain teasers.

For example, the "Airline Seating Problem" involves an airline flight with 100 seats and 100 passengers. The first passenger has lost their boarding pass and decides to sit in a random seat. Each subsequent passenger will either sit in their assigned seat or take a random unoccupied seat. 

The candidate must determine the probability that the last passenger will sit in their assigned seat.

Types of brain teasers you might face in consulting interviews  

There are seven common types of brain teasers that consulting firms may use in interviews.

Illusion question : 

Generating false impressions and focusing your attention on unimportant details and can lead you to miss the crucial information

Question 1:

Is it possible for a man in California to marry his widow's sister?

Question 2:

A farmer has 17 sheep and all but 9 die. How many are left?

Question 3:

How many two-cent stamps are there in a dozen?

Question 4:

If a doctor gives you three pills, telling you to take one every half hour, how many minutes will pass from taking the first pill to the last pill?

Question 5:

Two U.S. coins add up to 30 cents. If one of them is not a nickel, what are the two coins?

No. The word “his widow” signifies that the man has died.

9 sheeps. The question tries to lure you into calculating “17-9=8” when the answer is right there.

12 stamps. You didn't try to multiply 12 with 2, did you?

60 minutes. There are only 2 30-minute intervals, not 3.

A nickel (5 cents), and a quarter (25 cents). This question tricks you into thinking neither coin is a nickel.

Draw-explanation question : 

Providing you with a peculiar and improbable situation, and you have to develop an answer that fully explains the circumstances

A doctor's son's father was not a doctor. How is this possible?

A woman and daughter walked into a restaurant. A man walked past and the women both said “Hello, Father”. How is this possible?

Donald brought his wife to the hospital because she was suffering from appendicitis. The doctors removed her appendix. Five years later, the very same Donald brings his wife in, again for appendicitis. How is this possible?

A horse jumps over a castle, then lands on a man. The man disappears. What's happening?

A man was born in 1945, but he's only 30 years old now. How is this possible?

The doctor is the mother.

The man is a priest, or his name is Father.

Donald divorced and remarried.

1945 was the number of the hospital room.

Wording question : 

Including at least one word that can be interpreted into multiple meanings as well as misleadingly suggested by the context, usually different from the default interpretation in your mind, makes the question inexplicable 

What two words, when combined, hold the most letters?

People who smoke are much more likely to develop lung cancer than those who do not smoke. What research would possibly show that cigarette smoking does not cause cancer?

Make one word from all the following jumbled letters: R E O D N O W

What kind of cheese is made backwards?

What has four legs but only one foot?

“Post” and “office”.

One that shows an indirect relationship between smoking and lung cancer, i.e “smoking causes X, X causes lung cancer”. The key here is to look at “cause” as a direct relationship.

“One word”.

Edam cheese.

Pattern/trend questions : 

Involve a series of numbers or letters with a certain pattern or trend and your task is to either identify the following thing or fill in the gap.

What is the next number in the following sequence: 0 0 1 2 2 4 3 6 4 8 5 ?

What is the next letter in the following series: Y Z V W S T P Q ?

Which verb does not belong with the others in this set?

BRING BUY CATCH DRAW FIGHT SEEK TEACH THINK

MUSIC : VIOLIN is similar to:

(a) notes : composer / (b) sound : musical instrument / (c) crayon : drawing / (d) furniture : carpentry tools / (e) symphony : piano

What is the next number in the following sequence: 125, 64, 27, 8?

Number “10”

The sequence alternates between two different patterns:

Pattern 1: Incrementing by 1 (0, 1, 2, 3, 4, 5) 

Pattern 2:  Incrementing by 2 (0, 2, 4, 6, 8)

Letter “R”

The series alternates between two different patterns:

Pattern 1: Moving two letters forward in the alphabet (Y, V, S, P ...) Pattern 2: Moving one letter forward in the alphabet (Z, W, T, Q ...)

“THINK” is a mental process rather than a physical action

(b) sound : musical instrument

The next number in the sequence is 1=3^1.

125 = 5^3 

64 = 4^3 

27 = 3^3 

Logical questions : 

The least mind-bending format of them all, these questions typically don't include any creativity, illusions, or tricks, so you can solve them with just your pure math skills and logical reasoning.

A boy and a girl are sitting on a bench. “I’m a girl,” says the child with brown hair. “I’m a boy,” says the child with blond hair. If at least one of them is lying, which one is lying?

An explorer found a silver coin marked 7 BC. He was told it was a forgery. Why?

A bus can hold x people. It was half full from the start, and at the first stop, y people got off. How many people can now get on the bus?

What day follows the day before yesterday if two days from now will be Sunday?

During lunch hour a group of boys from Mr. Bryant’s homeroom visited a nearby grocery store. One of the five took an apple.

Jim said, “It was Hank or Tom”.

Hank said, “Neither Eddie nor I did it.”

Tom said, “Both of you are lying.”

Don said, “No, one of them is lying, the other is speaking the truth.”

Eddie said, “No, Don, that is not true.”

When Mr. Bryant was consulted, he said, “Three of these boys are always truthful but two will lie every time.”

Who took the apple?

Both are lying. If any of them told the truth, they would deliver one same answer.

At the start, the number of vacant seats on the bus was x/2. After the first bus stop it becomes x/2 + y.

Thursday. Today is Friday because “two days from now will be Sunday”. “day follows the day before yesterday” is just yesterday, so it’s Thursday.

Tom took the apple

Jim Hank, and Eddie were telling the truth

Tom and Don were lying

Letter-trick question:

These questions are twisted which plays with the organization demonstration and composition of letters, forcing us to consider them from a variety of perspectives.

What does this mean? “GGES EGSG SEGG ESGG”

What does this mean? “ROFORKAD”

What does this mean? “CCCCCCC”

What does this mean? “F AST”

What does this mean? “GR 12” AVE”?

Scrambled eggs.

Fork in the road.

Seven seas.

One foot in the grave.

Market-sizing and guesstimate questions : 

Guesswork questions that require respondents to make predictions about a topic in a given area using data to make informed decisions, and  effectively convey their thought process. 

This is one of the most popular types of brain teaser questions and is still widely used by recruiters. To gain a better understanding of this particular queries, you might read the article: Market-sizing & estimate questions.

→ You can also learn more about these 7 types of questions and how to solve them in the video: Solving ANY Brain Teasers After This Video. For Real!

Why Consulting Firms rarely use Brain Teasers in Interviews now?

Unfortunately, a lot of consulting firms have shifted away from using brain teasers in their interview processes for a number of reasons. Firstly, brain teasers may test a candidate's analytical and problem-solving abilities, they do not necessarily reflect the types of problems that consultants face in their day-to-day work .

Secondly, brain teasers can be intimidating for candidates and may not provide an accurate representation of their abilities . Candidates who are perfectly capable of solving complex business problems may struggle with brain teasers simply due to the pressure of the interview environment. This can result in an inaccurate assessment of a candidate's abilities and potential, leading to missed opportunities for both the candidate and the consulting firm.

Lastly, consulting firms have recognized the importance of diversity and inclusivity in their recruitment processes. Brain teasers may disadvantage candidates who have not had the opportunity to develop specific skills or who come from non-traditional backgrounds. 

By focusing on case interviews, which present candidates with real-world business problems that they may encounter as a consultant, consulting firms can provide a more level playing field for all candidates, regardless of their background or previous experience. This type of assessment is more reflective of the skills and abilities required for success as a consultant.

How to succeed in Consulting Interviews' Brain Teasers section?

Five ways to practice for brain teasers in consulting interviews.

Preparing for brain teasers in consulting interviews can be challenging, as they require a unique set of skills and abilities. However, with the right approach and practice, candidates can improve their performance and increase their chances of success. Below are some ways to practice for brain teasers in consulting interviews:

• Start with basic brain teasers: Before tackling more complex brain teasers, it's essential to start with basic puzzles and problems. This will help you develop your problem-solving skills and build confidence in your abilities.
• Focus on different types of brain teasers : There are many various types of brainteasers, such as word-based challenges, logical inquiries, and mathematics puzzles. Working on a number of different brainteasers to prepare yourself for the types of problems you may encounter in a consulting interview.
• Practice online resources: There are many online resources available that offer practice brain teasers and puzzles. Websites like  BrainDen and Mentalup offer a variety of riddles and mental challenges, practicing in conjunction with Case Interview Programs will help you to be more equipped to handle a great situation during the interview.
• Time management: In a consulting interview, time is often a factor, and candidates are expected to solve problems quickly and efficiently. Practice timing yourself when solving brain teasers to improve your speed and accuracy.
• Practice under pressure: Consulting interviews can be high-pressure situations, and candidates may feel anxious or stressed during the interview process. Practice solving brain teasers under pressure to simulate the interview environment and prepare yourself for the real thing.

Five tips for solving brain teasers in consulting interviews

Similar to other tests and examinations, the brain teaser in consulting interviews also has some helpful tips to use. Some resharpers that may improve candidates' performance include:

• Read the problem carefully:  The key to solving brain teasers is to understand the problem fully. Read the problem carefully, and make sure you understand what is being asked before attempting to solve the problem.
• Break the problem down: Brain teasers can be complex and challenging, but breaking the problem down into smaller parts can help make it more manageable. Identify the key elements of the problem and work on solving each element individually before putting them together.
• Use logic and reasoning: Try to use reasoning and creativity as you go through the brainteaser to come up with solutions. This may involve attempting different approaches, speculating, or using your understanding of science, math, or other disciplines to assist in solving the issue.
• Draw diagrams and visualize the problem: Drawing diagrams and visualizing the problem can help you understand the problem better and find a solution. Use it in a way that helps you see the problem from different angles and perspectives.
• Think outside the box: Brain teasers are designed to be challenging and require creative thinking to solve. Don't be afraid to think outside the box and explore unconventional solutions to the problem.

Four common mistakes when solving brain teasers during interviews

Nevertheless, there are some common mistakes that inexperienced candidates often have, preventing them from performing to their full potential. Here are a few things to steer clear of during the interview:

• Making assumptions : Brain teasers often require candidates to make assumptions, but it's essential to make only necessary assumptions and not make assumptions that are not supported by the problem.
• Explaining your thought unclearly: In a consulting interview, showing your thought is just as important as getting the right answer. Show your work and explain your thought process to demonstrate your problem-solving skills.
• Rushing to a solution: Time is often a factor in consulting interviews, but rushing to a solution without fully understanding the problem can lead to mistakes and errors.
• Overcomplicating the problem: Don't overcomplicate the problem by adding unnecessary complexity. Stick to the basics and use common sense to arrive at a solution.

Scoring in the McKinsey PSG/Digital Assessment

The scoring mechanism in the McKinsey Digital Assessment

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There are some questions or rather some principles about what candidates should and should not ask in an case interview to gain interviewer's approval

• Career Blog

8 Tough Brain Teaser Interview Questions and Answers in 2024

Brain teaser interview questions, also known as puzzle or logic questions, are designed to challenge candidates and evaluate their problem-solving, critical thinking, and creativity skills. They are usually asked in job interviews for positions that require analytical thinking or problem-solving abilities. Companies use these questions to assess a candidate’s ability to respond to unexpected and challenging situations, which can indicate their potential to excel in the role.

The importance of brain teaser questions lies in their ability to go beyond a candidate’s resume or credentials. Unlike traditional interview questions, which may have a predetermined answer or are related to a candidate’s job experience, brain teasers can reveal how a candidate thinks and approaches complex problems. They can also demonstrate a candidate’s ability to think quickly, be creative, and demonstrate their character and personality under pressure.

Common Types of Brain Teaser Interview Questions

Brain teasers can take many different forms, but they all have one common feature: they are designed to challenge you to think creatively and logically. Some of the common types of brain teaser interview questions include:

• Logic puzzles: These questions involve various scenarios or situations designed to test your logical reasoning skills.
• Numerical puzzles: These questions involve mathematical problems or puzzles that require you to use your math skills to solve.
• Lateral thinking puzzles: These are puzzles that can be solved through creative or unorthodox thinking.
• Competency-based questions: These questions are often hypothetical and ask you to demonstrate how you would respond in a specific situation.

The Purpose of Brain Teaser Interview Questions

The purpose of brain teaser questions is to assess how a candidate thinks and approaches complex problems. They are often used by companies to evaluate a candidate’s potential rather than their specific skills or experience. Brain teaser questions may also be used to evaluate a candidate’s ability to work under pressure, think creatively, be adaptable, and tackle complex problems. By asking these questions, employers can gain insights into how candidates solve problems and make decisions, which can be valuable in assessing their potential for the job.

Brain teaser interview questions are designed to challenge candidates and evaluate their problem-solving, critical thinking, and creativity skills. They are an important tool for hiring managers to assess the potential of candidates and provide insights into how they approach complex problems. It is essential for candidates to prepare for these questions to demonstrate their potential to excel in the role.

How to Prepare for Brain Teaser Interview Questions

When preparing for a brain teaser interview, it’s important to keep in mind that these types of questions are designed to test your problem-solving and critical thinking skills. With a few tips and best practices, you can feel more confident and prepared to tackle these challenging interview questions.

A. Tips for Answering Brain Teaser Interview Questions

Take your time: Brain teaser questions are meant to be challenging and require careful thought. Take a moment to gather your thoughts and ask clarifying questions before jumping into an answer.

Break down the problem: Often, brain teasers are presented as complex problems that can seem overwhelming. Break the problem down into smaller parts to identify patterns and possible solutions.

Use logic and reasoning: Brain teasers often involve patterns, sequences, or logic puzzles. Use your analytical skills to identify commonalities and solve the problem logically.

Show your work: As you work through a brain teaser, be sure to share your thought process with the interviewer. This can demonstrate your problem-solving skills and give insight into how you approach difficult situations.

B. Best Practices for Preparing for Brain Teaser Interview Questions

Research common brain teasers: There are many brain teasers that are commonly asked during interviews. Familiarize yourself with these questions and practice solving them ahead of time.

Practice under pressure: In addition to researching and solving brain teasers, try practicing with time constraints. This can simulate the pressure of an interview and prepare you for thinking on your feet.

Challenge yourself: As you prepare for brain teaser questions, don’t shy away from difficult problems. Push yourself to solve more complex challenges to build your problem-solving skills.

Get feedback: Practice solving brain teasers with a friend or colleague and ask for feedback on your performance. This can help you identify areas for improvement and refine your approach.

C. The Benefits of Preparing for Brain Teaser Interview Questions

Preparing for brain teaser interview questions can have numerous benefits for your career. Not only does it demonstrate your analytical and problem-solving skills, but it can also improve your overall critical thinking abilities. Additionally, practicing under pressure can help you feel more comfortable in high-stress situations, which can be beneficial in any work environment. By taking the time to prepare for brain teaser questions, you can feel more confident and prepared to tackle any challenge that comes your way during an interview.

The 8 Tough Brain Teaser Interview Questions and Answers

As a job seeker, it’s important to be prepared for any questions that may come your way during an interview, including tough brain teasers. These questions are designed to assess your problem-solving abilities and critical thinking skills. Here are eight examples of tough brain teaser interview questions and answers that you can use to help you prepare for your next job interview:

Question 1: Example Question and Answer

Q: How many golf balls can fit in a school bus?

A: To answer this question, you need to make some assumptions. Let’s assume the school bus is 40 feet long, 8 feet wide, and 6 feet high. That means it has a volume of 1,920 cubic feet. Now, let’s assume a golf ball is 1.68 inches in diameter. That means each golf ball has a volume of about 2.65 cubic inches. To fill the entire school bus with golf balls, we need to convert the volume of the school bus to cubic inches and then divide by the volume of a single golf ball.

• Convert school bus volume to cubic inches:

40 ft x 12 in/ft = 480 in (length) 8 ft x 12 in/ft = 96 in (width) 6 ft x 12 in/ft = 72 in (height) 480 in x 96 in x 72 in = 331,776 cubic inches

• Divide school bus volume by golf ball volume:

331,776 cubic inches ÷ 2.65 cubic inches per golf ball = 125,233 golf balls

So, the answer is approximately 125,233 golf balls can fit in a school bus.

Question 2: Example Question and Answer

Q: How would you design a spice rack for blind people?

A: This question is designed to assess your creativity and problem-solving abilities. A possible answer might include:

• Use different textures or shapes on each spice bottle to allow for easy differentiation by touch.
• Label the spices using braille or embossed letters.
• Make the spice rack adjustable or modular to accommodate different types and sizes of spice bottles.
• Include a simple guide or key to help users easily locate the desired spice.

Question 3: Example Question and Answer

Q: You are standing in front of three light switches. One of them controls a light bulb inside a closed room. You cannot see into the room. You can only open the door once, and after that, you cannot touch the switches. How do you figure out which switch controls the light bulb?

A: To solve this brain teaser, you need to follow a specific set of steps:

• Turn on one of the switches and leave it on for a few minutes.
• Turn off that switch and turn on another switch.
• If the light bulb is on, then you know that the switch you just turned on controls the light bulb. If the light bulb is off but warm to the touch, then you know that the switch you initially turned on and then turned off controls the light bulb. Finally, if the light bulb is off and cool to the touch, then the remaining switch controls the light bulb.

Question 4: Example Question and Answer

Q: You have a 3-gallon jug and a 5-gallon jug. How can you measure exactly 4 gallons of water using only these two jugs?

A: Here’s a step-by-step solution:

Fill the 5-gallon jug to its maximum capacity. Pour the 5 gallons of water from the 5-gallon jug into the 3-gallon jug, which will leave 2 gallons of water in the 5-gallon jug. Empty the 3-gallon jug. Pour the 2 gallons of water from the 5-gallon jug into the empty 3-gallon jug. Fill the 5-gallon jug to its maximum capacity again. Pour enough water from the 5-gallon jug into the 3-gallon jug until the 3-gallon jug is full. This will leave 4 gallons of water in the 5-gallon jug.

Now you have exactly 4 gallons of water in the 5-gallon jug.

Question 5: Example Question and Answer

Q: How many trailing zeros are there in the number 100 factorial (100!)?

A: To determine the number of trailing zeros in 100!, you need to identify the number of factors of 5 since multiples of 10 (which have one trailing zero) are created by the combination of factors of 2 and 5.

Counting the number of multiples of 5 less than or equal to 100 gives you 20. However, there are multiples of 5 squared (25), multiples of 5 cubed (125), and so on. So, you need to consider the additional multiples of 5^2, 5^3, and so on that divide 100.

Dividing 100 by 5^2 gives you 4, and there are no multiples of 5^3 or higher within the range of 1 to 100. Therefore, the total number of trailing zeros in 100! is 20 + 4 = 24.

Question 6: Example Question and Answer

Q: How many squares are there on a chessboard?

A: To count the number of squares on a chessboard, you need to consider squares of different sizes. Start by counting the 64 individual squares (1×1). Then, count the 49 squares that are formed by combining four individual squares (2×2). Continue this process for squares of size 3×3, 4×4, and so on until you reach the largest square, which is the entire chessboard (8×8).

The total number of squares on a chessboard is the sum of all these counts:

1×1 squares: 64 2×2 squares: 49 3×3 squares: 36 4×4 squares: 25 5×5 squares: 16 6×6 squares: 9 7×7 squares: 4 8×8 squares: 1

Adding these counts together, you get a total of 204 squares on a chessboard.

Behavioral Questions vs. Brain Teaser Questions

A. definition and differences between behavioral and brain teaser questions.

During job interviews, employers often ask job seekers a variety of questions to assess their problem-solving, critical thinking, and communication skills. Two types of questions that you may encounter during a job interview are behavioral and brain teaser questions.

Behavioral Questions:  Behavioral questions inquire about how you have handled previous work situations or challenges. These questions are designed to allow the interviewer to understand your past work experiences, your response to various situations, and your attitude towards work. Behavioral questions require you to provide specific examples of how you have handled specific work scenarios in the past.

Brain Teaser Questions:  Brain teaser questions are designed to assess your thought process, problem-solving capabilities, and creativity. These types of questions do not necessarily have a right or wrong answer. Typically, brain teaser questions are seemingly unrelated to the job or industry and may be puzzles, riddles, or other types of mind-bending challenges that rely on logic and critical thinking to solve.

The fundamental difference between behavioral and brain teaser questions is that behavioral questions look at how you have responded to situations in the past, while brain teaser questions assess your ability to think on your feet and solve unfamiliar problems quickly.

B. How to Prepare for Behavioral and Brain Teaser Questions

The best way to prepare for behavioral and brain teaser questions is to practice. Try to anticipate which types of questions may be asked and prepare specific examples to share during the interview.

For behavioral questions, review the job description and requirements before the interview. Then, think of specific examples that demonstrate how you have handled similar situations in the past. Make sure to use the STAR technique (Situation, Task, Action, Result) when answering behavioral questions to showcase your problem-solving skills effectively.

When it comes to brain teaser questions, the best way to prepare is by working on logic puzzles, brainteasers, and riddles. You can find plenty of resources online or in books to help you practice. Work on puzzles that stretch your mind and challenge you to expand your thinking.

C. Tips for Answering Behavioral and Brain Teaser Questions

Here are some tips to keep in mind when answering behavioral and brain teaser questions:

Behavioral Questions:

Be specific: Use concrete examples to illustrate your answer. Provide clear details of what you did and why you did it.

Focus on your actions: Highlight the actions you took and the decisions you made in response to the situation.

Use the STAR technique: The STAR technique is Situation, Task, Action, and Result. Use this framework to structure your answers and showcase your problem-solving abilities effectively.

Brain Teaser Questions:

Clarify the question: Ask the interviewer to repeat or explain the question if you don’t understand it fully.

Take your time: Don’t rush to answer the question.

The Role of Brain Teaser Questions in the Hiring Process

When it comes to the hiring process, many companies are turning to brain teaser questions as a way to assess a candidate’s critical thinking and problem-solving abilities. Here, we will explore how hiring managers use brain teaser questions, the benefits of using them, and the limitations that should be considered.

A. How Hiring Managers Use Brain Teaser Questions

Hiring managers use brain teaser questions to get a sense of a candidate’s ability to think on their feet, approach problems creatively, and work through challenging situations. These types of questions often require the candidate to use logic, reasoning, and unconventional thinking to come up with a solution.

Some hiring managers use brain teasers as a way to gauge a candidate’s personality and how they handle pressure. These questions can reveal a lot about how a candidate works under stress, their communication skills, and how they adapt to change.

B. The Benefits of Using Brain Teaser Questions

There are several benefits to using brain teaser questions in the hiring process. First and foremost, they allow hiring managers to quickly assess a candidate’s critical thinking skills, which are essential for success in many roles.

Brain teasers also help hiring managers get a sense of a candidate’s personality and how well they may fit into the company culture. By asking questions that require unconventional thinking and problem-solving, hiring managers can get a sense of how a candidate approaches challenges and whether they are a good fit for the team.

C. The Limitations of Brain Teaser Questions

While brain teaser questions can be a useful tool in the hiring process, it is important to recognize their limitations. First and foremost, they should not be the sole criteria on which a candidate is evaluated.

It is also important to recognize that brain teaser questions may not accurately reflect a candidate’s ability to perform the specific job they are applying for. While these questions can be useful in assessing critical thinking and problem-solving skills, they may not be relevant to the day-to-day tasks of the job.

Finally, it is important to ensure that brain teaser questions are fair and not biased against certain candidates. Questions should be designed to challenge all candidates equally, regardless of their background or experience.

Brain teaser questions can be a useful tool in the hiring process, allowing hiring managers to quickly assess a candidate’s critical thinking skills and personality. However, it is important to recognize their limitations and ensure they are used fairly and effectively.

The Impact of Brain Teaser Questions on Job Performance

Incorporating brain teaser questions during the hiring process has become increasingly popular as hiring managers aim to assess a candidate’s ability to think critically under pressure. However, there is a debate on whether brain teasers accurately predict job performance.

A. The Relationship between Brain Teaser Performance and Job Performance

Some studies suggest that there is a positive correlation between brain teaser performance and job performance. Candidates who score well on brain teasers tend to perform better on the job. This is because brain teasers test a candidate’s ability to think logically, creatively and make sound decisions when faced with complex problems.

B. How Hiring Managers Evaluate Brain Teaser Performance

Hiring managers evaluate brain teaser performance in different ways. Some use it as a primary factor in deciding whether to hire a candidate, while others use it as one of many factors to evaluate a candidate. They assess a candidate’s performance by examining how quickly and efficiently they answer the questions, their thought processes, and the accuracy of their answers.

C. The Potential Risks of Overemphasizing Brain Teaser Performance

While brain teasers can be an effective tool for evaluating candidates, they also come with potential risks. Overemphasizing brain teaser performance may lead to the exclusion of highly qualified candidates who may not perform well under pressure. It may also place undue stress on candidates, leading to anxiety and nervousness that can negatively impact their performance.

Furthermore, brain teasers may only assess an individual’s problem-solving ability, whereas other important job-specific skills may not be evaluated. Thus, it is essential to use brain teasers as part of a more comprehensive evaluation process.

While brain teasers can provide valuable insights into a candidate’s critical thinking ability, it should not be the sole criterion for evaluating job performance. It is important to use a combination of various assessment tools to ensure a fair and accurate evaluation of a candidate’s suitability for the role.

The Future of Brain Teaser Questions in the Hiring Process

A. trends in the use of brain teaser questions.

As the job market becomes increasingly competitive, hiring managers are looking for new ways to identify the top candidates for their open positions. One trend that has emerged in recent years is the use of brain teaser questions during the hiring process.

Brain teaser questions are designed to test a candidate’s problem-solving skills, creativity, and ability to think on their feet. They can be used in a variety of industries and job roles, from finance and accounting to marketing and technology.

Some companies use pre-designed brain teaser questions, while others prefer to create their own based on the specific job requirements. As the use of brain teaser questions becomes more widespread, it’s important for hiring managers to ensure that the questions are relevant to the job and provide a true measure of a candidate’s abilities.

B. The Benefits and Risks of Using Brain Teaser Questions

The use of brain teaser questions in the hiring process has both benefits and risks. On the one hand, they can help managers identify candidates who are able to think critically and creatively, which may be particularly important for roles that require problem-solving skills.

Brain teasers can also be a good way to differentiate between candidates who may have similar qualifications and experience. Additionally, they can give candidates a chance to showcase their skills in a way that traditional interview questions may not.

However, there are also risks associated with using brain teaser questions in the hiring process. For one, they may not be a fair indicator of a candidate’s overall abilities or potential for success in a role. Additionally, some candidates may find them intimidating, which could create a negative impression of the company.

To mitigate these risks, it’s important for hiring managers to use brain teaser questions in conjunction with other types of interview questions and assessments. Additionally, they should be transparent about the use of brain teasers and provide candidates with adequate preparation time before the interview.

C. Future Innovations in Brain Teaser Interviews

As technology continues to evolve and change the way we work, it’s likely that we’ll continue to see innovations in the use of brain teasers during the hiring process. One trend that may emerge is the use of virtual reality or augmented reality to provide candidates with more dynamic and engaging brain teaser experiences.

Another potential innovation is the use of machine learning algorithms to analyze a candidate’s responses to brain teaser questions and provide more nuanced insights into their problem-solving abilities.

Ultimately, the future of brain teaser questions in the hiring process will be shaped by a variety of factors, including advances in technology, changes in the job market, and evolving attitudes toward hiring practices. As hiring managers continue to explore the use of brain teasers, it will be important to strike a balance between their potential benefits and risks.

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"Embrace the Challenge: Unleash Your Logic with Sudoku Mind Puzzle: Math Games !" "Are You Ready to Sharpen Your Brain? Step into the World of Classic Sudoku & Brain Games Now !" Welcome to a world where logic and fun merge seamlessly in "Sudoku Mind Puzzle: Math Games", the ultimate destination for sudoku puzzle enthusiasts and brain game lovers. If you're eager to challenge your brain, improve your logical thinking, and enjoy hours of mind-engaging puzzles, you've come to the right place. Our game is a celebration of classic Sudoku, designed to test your mental agility and entertain your brain. Sudoku is more than just a game ; it's a mind workout that enhances your problem-solving skills and boosts brain power. In "Sudoku Mind Puzzle : Math Games" you'll find a vast array of Sudoku puzzles that cater to all skill levels, from beginners to seasoned pros. Each puzzle invites you into a captivating world of numbers, where each row, column, and a grid holds the key to victory. With our intuitive interface and a variety of puzzles, getting your daily dose of brain exercise has never been more enjoyable. Dive into the Heart of Sudoku with 'Sudoku Mind Puzzle: Math Games,' where every puzzle is a thrilling brain-teaser designed to sharpen your logic and delight your mind. Our game boasts a rich array of features tailored to enhance your Sudoku journey: Diverse Difficulty Levels: Choose from Easy, Medium, Hard, and Expert modes to match your Sudoku skill level and challenge your brain in just the right way. Seamless Game Continuation: Pause and resume your Sudoku puzzles anytime, ensuring your brain-picking logic game awaits exactly where you left it. Time Tracking: Keep an eye on your puzzle-solving speed with our time recorder feature, perfect for those looking to boost their brain's efficiency. Endless Levels of Sudoku Puzzles: Explore countless levels packed with mind-bending Sudoku puzzles, offering endless hours of classic brain game enjoyment. Progress Tracking: View your Sudoku stats to monitor your evolving puzzle-solving prowess and keep your motivation sky-high. Hints and Solutions: Stuck on a tricky puzzle? Use hints or view the solution to learn and improve your Sudoku strategy. Notes: Jot down your Sudoku strategies with customizable note options, enhancing your logical puzzle-solving approach. Unlimited Undo and Erase: Perfect your Sudoku technique with the freedom to undo or erase moves, ensuring each puzzle reflects your best logic and mind power. Premium Features: Jump into our starting level puzzles for free and elevate your game to further levels with a simple in-app purchase when you're ready for more challenges. Get started with complimentary hints, and if you find yourself craving additional assistance, more are available for purchase. For uninterrupted access to all features and puzzles, we offer flexible subscription options—weekly, monthly, or yearly—or you can choose to purchase the whole difficulty level only once for the whole lifetime, and one-time access to premium content of a specific level. Terms of Use: Unleash the power of our platform while protecting your rights. https://docs.google.com/document/d/10WqX4d6hqIFWXX68P1pgKP6LirttDs5E7VQwWg6-eA/edit Privacy Policy: Your privacy matters - explore our commitment to keeping your information safe. https://docs.google.com/document/d/1_NOrRelvir5amqvibJjnvR2DSI9b9GPEGhaxH8z2sMU/edit?usp=sharing If you have any questions or suggestions on how we can improve the application, please do not hesitate to contact us at [email protected]

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Brain Teaser: Can You Guess the Vegetable? This Emoji Puzzle is Stumping 99%

Brain Teaser: Test your brainpower with this emoji vegetable guessing game. Can you identify the vegetable from the emojis and join the top 1%?

Brain teasers are more than just riddles or puzzles; they're a mental workout disguised as entertainment. These mind-benders challenge our thinking patterns, pushing us beyond the obvious to find creative solutions.

There are many types of brain teasers available online that pose different challenges and help you improve your cognitive abilities. 

One such brain teaser is baffling people's minds in this puzzle you need to find out the name of the vegetable with the help of emojis displayed in the image. 

This brain teaser is a fun way to test your observation skills and ability to think creatively. It also demonstrates the potential of emojis to be used beyond simple communication, adding a layer of playful challenge.

So, can you determine the name of the vegetable in this amazing challenge? But be aware that you have a time limit! 

You need to find the name of the hidden vegetable in 12 seconds. 

Start the timer and put your brain to the test. 

Brain Teaser: Guess the Name of the Vegetable in 12 Seconds

Source: Planetworm Riddles and Tests 

So, were you able to spot the name of the vegetable? 

Is your emoji game strong enough to decode the name of this vegetable? 

Hurry up the time is running out. 

Do you need a hint? 

Well here is one for you: This vegetable grows underground. 

Now try to guess the name of the vegetable. 

Whether you're looking for a quick mental break or a sustained intellectual challenge, brain teasers offer a unique way to engage your mind and boost your cognitive abilities. 

So, did you guess the name of the vegetable? 

3... 2... and 1! 

Oh no! The time limit has finished. 

If you found the name then congratulations. Your skills have paid off really well. 

It is alright if you didn't figure out the name of the vegetable. You can try to guess it without any time limit. 

Guess the Vegetable Name - Solution

See, wasn't this brain teaser easy? Keep trying your hands on these puzzles and share them with your loved ones. 

READ| This Math Brain Teaser Is So Hard, Only 1% Of People Can Solve It. Can You Be One of Them?

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