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Get Ready for Brainteasers of Any Kind

Secret language
Brainteaser: Secret language
What does this say? Yyuryyubicuryy4me
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The cradle
Brainteaser: The cradle
Which weighs less, a pound of feathers or a pound of rocks?
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Math test
Brainteaser: Math test
Can you combine the numbers 3 and 7, using each one exactly twice, with any arithmetic operators, resulting in 24?
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The smuggler
Brainteaser: The smuggler
Every day, a cyclist crosses the border between Spain and France carrying a bag. No matter how much custom officials investigate him, they do not know what he is smuggling. Do you?
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Brainteasers are a helpful exercise to train your logical thinking.
Can you solve our brain teasers? Try it out!
The spirit
Brainteaser: The spirit
You are an expert on paranormal activity and have been hired to locate a spirit haunting in an old resort hotel. Strong signs indicate that the spirit lies behind one of four doors. The inscriptions on each door read as follows: Door A: It's behind B or C Door B: It's behind A or D Door C: It's in here Door D: It's not in here Your psychic powers have told you three of the inscriptions are false, and one is true. Behind which door will you find the spirit?
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Ticket number
Brainteaser: Ticket number
4 fathers, 2 grandfathers and 4 sons go to the cinema to watch the movie. What is the minimum number of the tickets they need to buy?
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Age question
Brainteaser: Age question
When asked how old he was, Mayank replied, 'In 2 years I will be twice as old as I was five years ago.' How old is he?
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Decode the picture
Brainteaser: Decode the picture
Can you decode this picture and tell me what it says ?
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Deaf and Dumb
Brainteaser: Deaf and Dumb
A London cab driver picked up a lady who was a notorious chatterbox. He did not want to engage in conversation, so he pretended to be deaf and dumb. He pointed to his mouth and ears to indicate that he could neither speak nor hear. After she alighted, he pointed to the meter so that she could see how much she owed. She paid him and walked off. Then she realized that he could not have been a deaf mute. How did she know?
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Sahara desert
Brainteaser: Sahara desert
In Sahara desert , 3 men found a big 24l jar full of water. Since there is shortage of water, they decided to distribute the water among themselves such that they all have equal amounts of it. But they only have a 13l, a 5l and an 11l jar. How do they do it?
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The burning island
Brainteaser: The burning island
Alexander is stranded on an island covered in forest. One day, when the wind is blowing from the West, lightning strikes the west end of the island and sets fire to the forest. The fire is very violent, burning everything in its path, and without intervention the fire will burn the whole island, killing the man in the process. There are cliffs around the island, so he cannot jump off. How can Alexander survive the fire? (There are no buckets or any other means to put out the fire)
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Bounce the ball
Brainteaser: Bounce the ball
During an experiment, a guy throws a bouncy ball from a 90 feet tall building. The ball has a specific characteristic. Every time it hits the ground, it bounces up half way. How many bounces do you think the ball will make before it comes to a stop?
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What did you eat?
Brainteaser: What did you eat?
You throw away the outside and cook the inside. You eat the outside and throw away the inside. What did you eat?
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Break and fall
Brainteaser: Break and fall
What falls but never breaks? What breaks but never falls? They are closely related but never there at the same time.
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Math Wiz
Brainteaser: Math Wiz
Replace all 'x' with digits 1, 2, 3, 4, 5 and 6 to make the statement below true. xx * x = xxx
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Math quiz
Brainteaser: Math quiz
How can you make the following equation true by drawing only one straight line 5 + 5 + 5 = 550? Can you figure it out?
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Choose your way
Brainteaser: Choose your way
You're in a mansion and the power's out, but the moon is bright enough for you to see. You are in front of a green door and a red door. Pick one (it doesn't matter which one). Now you see a purple door and an orange door. Pick one (again, it doesn't matter which one you pick.) Now you see a door with a golden handle and a door with a silver handle. Pick one. You finally come to some signs on three doors. One says "Death from downing," another one says "Death from machine guns", and the last one says "Death from electric chair." Then you see a big sign off to the side that says "Or stay in the mansion and starve to death." What do you choose and still live?
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Lockers
Brainteaser: Lockers
Suppose you are in a hallway lined with 100 closed lockers. You begin by opening every locker. Then you close every second locker. Then you go to every third locker and open it (if it is closed) or close it (if it is open). Let us call this action toggling a locker. Continue toggling every nth locker on pass number n. After 100 passes, where you toggle only locker #100, how many lockers are open?
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The fourth price
Brainteaser: The fourth price
When I went to the store, I purchased four items. The following shows the cost of three of the items: $1.50 $3.00 $4.00 The line to the checkout was pretty long, so to quench my boredom I started playing with my pocket calculator while waiting. I found out, to my surprise, that the four prices of the four items I purchased added to the same number as I got when I multiplied the four prices together. What was the price of the fourth item?
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Diophantus
Brainteaser: Diophantus
Diophantus was a Greek mathematician who lived in the third century. He was one of the first mathematicians to use algebraic symbols. Most of what is known about Diophantus's life comes from an algebraic riddle from around the early sixth century. The riddle states: Diophantus's youth lasted one sixth of his life. He grew a beard after one twelfth more. After one seventh more of his life, he married. 5 years later, he and his wife had a son. The son lived exactly one half as long as his father, and Diophantus died four years after his son. How many years did Diophantus live?
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Sum-day
Brainteaser: Sum-day
Some people believe that January 1, 2000 is the first day of the 21st century. Other people believe that the honor belongs to January 1, 2001. But everyone should agree that January 1, 2002 is the first "sum-day" of the new century- when you write out that date in standard notation, it becomes 01/01/02, and 1+1=2. More generally, a sum-day is a date in which the day and month add up to the year. With that in mind: A) What is the last sum-day of the 21st century? B) How many sum-days are there in the 21st century?
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1 4 7 8 9 12 15
1 4 6 7 8 9 10 12 15

Questions

Frequently Asked Questions
We are happy to answer the most frequently asked questions.

Brain teasers in the form of math problems and logic puzzles can still appear in interviews, but they are quite rare. More common now are market sizing guesstimates, such as “How many tennis balls can fit into a smart car?” These questions may also be referred to as brain teasers. In general, brain teasers test your creativity and ability to think outside the box.

Brain teasers are uncommon in interviews, and there is no specific rule regarding when an interviewer may choose to use one. However, they are more typical in final rounds and can be asked either before or after the main case discussion.

Market sizing guesstimates are often referred to as brain teasers as well. They are more common in interviews and consist of questions that ask you to determine a specific quantity, such as “How many golf balls can you fit into a passenger Boeing 747?” These questions test your ability to define a problem, break it down into assumptions, and use math to solve it.

Always prioritize case studies and the personal fit portion in your interview preparation, as these are the crucial aspects of your interview! Once you feel more comfortable with those, you can integrate some brain teaser practice into your preparation. This may give you the advantage you need to stand out among other candidates! You can use our brain teaser library to challenge your creative thinking. Have fun!

Brain Teaser – Challenge Your Logical and Numerical Thinking

A brain teaser is a riddle or puzzle designed to challenge your logical thinking. In interviews, interviewers may use them to gain insights into your logical and creative thinking skills, which are valuable in various careers. The most important aspect here is not just the answer but how you approach the problem. Practice our brain teasers to prepare yourself for any interview situation!

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