• Brain Teasers & Puzzles

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    • A river. Shepherd wolf goat and a cabbage on one bank. Wolf wants to eat the goat wants the cabbage. Into the shepherd can take only one animal or a cabbage in the boat. Two animals or an animal and a cabbage can’t fit in the boat together with the shepherd. Surprisingly neither wolf nor goat can paddle.

      How does the shepherd get wolf goat and cabbage to the other side so that goat never stays with wolf or cabbage without shepherds’ supervision?

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    • Prison guards are bored so during dinner they announce the prisoners that they will play a game:

      In the morning they will stand in a line so that every prisoner will see all standing in front of him but no one behind him. Guards will randomly paint red or white stripe on their back.

      They will ask prisoners one by one from the last to the first. They will be allowed to say just one word “red” or “white”. If the prisoner says the color he has on his back he may go home in opposite case he will be executed without delay.

      The prisoners are in one cell during the night and they can discuss the tactics.

      Which is the best? How many will survive?

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    • There is father and son in a car. As it happens on the roads from time to time the have a terrible accident. They are both seriously injured and ambulances carry them to two different hospitals.

      The son is on a surgery table while the surgeon walks in and says: „I can’t do the surgery on him he is my son!”

      How is it possible?

      (assume relations are blood – no stepfather involved)

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    • There are 13 exactly same looking coins. One of them has slightly different weight than the others – we don’t know if it is heavier or lighter. Can you tell in 3 scalings which one it is using even arm balance?

      If this riddle by any chance seemed too easy for you, try 40 coins in 4 scalings – the principal is the same.

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    • You were given nine same looking coins of which one is fake – weighs less. You can use even arm balance. How do you find out which coin is fake in two scalings?

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    • Five pirates stole a treasure – exactly hundred gold coins.

      Pirates have a special way of dividing their loot:

      • The oldest one suggests how he would split up the loot.
      • Everyone votes.
      • If he gets more than half votes they split the loot according to his proposal.
      • If he doesn’t the others kill him and the process starts all over again – without the dead pirate.

      All pirates are very used to this way of dividing and they never break the rules. Everyone’s top priority is his life. Second is money. And if there is no money or life involved in his decision he likes to harm the others.

      How will they split the loot?

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      • 1,422.0K views
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    • As it often happens in life evil warlock imprisoned a wise man. Surprisingly he gave him a chance to save himself if he fulfils one task.

      There is a round tray on the table which can be turned around freely. There are four coins on the tray placed as corners of a square.

      Wiseman has his eyes covered so he doesn’t see anything. His task is to turn the coins so that they are all heads up.

      He is not in easy situation. He may turn some coins and than the warlock will turn the tray around. He turns some coins again warlock turns the tray again. It goes on until all coins are turned correctly. At that moment evil warlock ends the game.

      Wiseman can’t recognize one side from the other by touching it. He has to leave the coins where they were in the corners of a square. And mainly – because of the evil magic – he has the worst luck so if he relies just on chance he will never fulfill the task.

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    • Imagine you want to send a valuable item to your friend. You have big enough box on which you can place several padlocks. You both have enough padlocks but the problem is that you don’t have keys to padlocks of the other one.

      How do you send the valuable item so that it doesn’t go unlocked? Sending just a key doesn’t help because someone could replicate it.

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      • 1,421.9K views
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    • Group of friends is trapped in a burning house. The house is going to collapse in 12 minutes so they desperately want to get out. They have to run through a hallway which is in flames. If someone wants to pass through he has to have a fire extinguisher to hold the flames back at least a little. Problem is that the friends have only one.

      Only two people can go at once. Than somebody has to return with the extinguisher and other two can go.

      There is one fireman among the friends who moves through flames with ease and he can ran through the hallway in one minute. His best friend who is in great shape can run through in 2 minutes. There is an older man who needs four minutes and a drunken guy who will need 5 minutes to pass through. If two people go together they move at speed of the slower one.

      How will they do it so that they all get out before the house collapses?

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    • You have two ropes.

      Each of them burns for one hour. They burn unevenly in different parts though – it means that one half can burn for 20 minutes and other half for 40 minutes. In addition you have a box of matches.

      Measure 15 minutes!

      rope and burning match stick puzzle

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      • 3 answers
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