• # Brain Teasers & Puzzles

Questions Per Page:
• There are three boxes. One is labeled “APPLES” another is labeled “ORANGES”. The last one is labeled “APPLES AND ORANGES”. You know that each is labeled incorrectly. You may ask me to pick one fruit from one box which you choose.

How can you label the boxes correctly?

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ravi Expert
• 3991 views

• Three men in a cafe order a meal the total cost of which is \$15. They each contribute \$5. The waiter takes the money to the chef who recognizes the three as friends and asks the waiter to return \$5 to the men.

The waiter is not only poor at mathematics but dishonest and instead of going to the trouble of splitting the \$5 between the three he simply gives them \$1 each and pockets the remaining \$2 for himself.

Now, each of the men effectively paid \$4, the total paid is therefore \$12. Add the \$2 in the waiters pocket and this comes to \$14…..where has the other \$1 gone from the original \$15?

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ravi Expert
• 5348 views

• There are twenty coins sitting on the table, ten are currently heads and tens are currently tails. You are sitting at the table with a blindfold and gloves on. You are able to feel where the coins are, but are unable to see or feel if they heads or tails. You must create two sets of coins. Each set must have the same number of heads and tails as the other group. You can only move or flip the coins, you are unable to determine their current state. How do you create two even groups of coins with the same number of heads and tails in each group?

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ravi Expert
• 5399 views

• An Arab sheikh tells his two sons to race their camels to a distant city to see who will inherit his fortune. The one whose camel is slower wins. After wandering aimlessly for days, the brothers ask a wise man for guidance. Upon receiving the advice, they jump on the camels and race to the city as fast as they can.
What did the wise man say to them?

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ravi Expert
• 7557 views

• A Petri dish hosts a healthy colony of bacteria. Once a minute every bacterium divides into two. The colony was founded by a single cell at noon. At exactly 12:43 (43 minutes later) the Petri dish was half full.
At what time will the dish be full?

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ravi Expert
• 4558 views

• This logic puzzle was published in Martin Gardner’s column in the Scientific American. You are in a room with no metal objects except for two iron rods. Only one of them is a magnet.
How can you identify which one is a magnet?

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ravi Expert
• 3496 views

• How can you throw a ball as hard as you can and have it come back to you, even if it doesn’t bounce off anything? There is nothing attached to it, and no one else catches or throws it back to you.

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ravi Expert
• 3828 views

• A man who lives on the tenth floor takes the elevator down to the first floor every morning and goes to work. In the evening, when he comes back; on a rainy day, or if there are other people in the elevator, he goes to his floor directly. Otherwise, he goes to the seventh floor and walks up three flights of stairs to his apartment.
Can you explain why?
(This is one of the more popular and most celebrated of all lateral thinking logic puzzles. It is a true classic. Although there are many possible solutions that fit the conditions, only the canonical answer is truly satisfying.)

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ravi Expert
• 3475 views

• Your last good ping-pong ball fell down into a narrow metal pipe imbedded in concrete one foot deep.
How can you get it out undamaged, if all the tools you have are your tennis paddle, your shoe-laces, and your plastic water bottle, which does not fit into the pipe?

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ravi Expert
• 4553 views

• One day three Greek philosophers settled under the shade of an olive tree, opened a bottle of Retsina, and began a lengthy discussion of the Fundamental Ontological Question: Why does anything exist?

After a while, they began to ramble. Then, one by one, they fell asleep.

While the men slept, three owls, one above each philosopher, completed their digestive process, dropped a present on each philosopher’s forehead, the flew off with a noisy “hoot.”

Perhaps the hoot awakened the philosophers. As soon as they looked at each other, all three began, simultaneously, to laugh. Then, one of them abruptly stopped laughing. Why?

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ravi Expert
• 4899 views

• ## More puzzles to try-

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• ### Finding secret number puzzle

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• ### What color are the stairs?

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• ### Making Dollar riddle

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• ### Arrange the queens

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• ### The Mathematics Class

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• ### GALILEO’S PARADOX OF THE INFINITE

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• ### What am I?

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• ### How many members are there in Mr. Sparrow’s family?

In Mr. Sparrow’s family, there are one grandfather, one grandmother, two fathers, two mothers, one father-in-law, one mother-in-law, four children, three grandchildren, ...Read More »
• ### Sherlock two pills riddle

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• ### Theives and police get across river puzzle

Three Theives (Aldo, Baldo and Caldo) are arrested by three different policemen (Xiao, Yiao and Ziao) standing on the shore. No ...Read More »
• ### Bank cashier mistake puzzle

You went to a bank to cash out your cheque. By mistake the bank cashier gives you- Dollar amount in ...Read More »
• ### Which will make the water level higher?

There is a brick of gold and a brick of iron in a boat (both 10 inch blocks), if they ...Read More »
• ### How did the man win the bet?

A boy at a carnival went to a booth ran by a man who said “If I can write your ...Read More »