The Candle Problem by Karl Duncker, 1945

You are in a room with a table pushed against the wall. On it is a box of thumbtacks, matches, and a candle. You must fix...

Resourceful postman

When the postman arrived at the Smith home to deliver mail through a slot in the front door, he was surprised to find the...

Simple password

A man wanted to enter an exclusive club but did not know the password that was required. He waited by the door and listened. A...

Measuring Water puzzle

You had an infinite supply of water and a 3 and a 5 - liter bottles You would to measure exactly 4 liters of water. How...

Detective’s find

Once a detective found a pipe, top hat, a scarf, a carrot and five pieces of coal lying together in the middle of a field. What is...

Smart policemans

A homicide team enters a crime scene where a dead body of a fat old man lies there on the floor with blood oozing...

Time measurement task

A man has two ropes of varying thickness (Those two ropes are not identical, they aren’t the same density nor the same length nor...

Vigilant woman

A woman is sitting in her hotel room when there is a knock at the door. She opened the door to see a man...

Funny idea to escape prisons

Two convicts are locked in a cell. There is an unbarred window high up in the cell. No matter if they stand on the bed,...

Resourceful detective

A man murders his wife with a knife in their car. He throws her out of the car being careful not to leave any...

Life-saving decision for the ship and crew

A Navy sailor on the deck of a cruiser noticed an naval mine in the water directly in the path of the ship. With...

Creative solution to personal problem

A Marine was in the service. One day he received a letter from his girlfriend back home: Dear Ricky, I can no longer continue our relationship....