The Importance of a Good Problem Statement

A metal rod stirred the liquid molten metal. However, at the same time it was collapsing and polluting the metal. The solution to the problem...

Emperor’s bold decision

At the beginning of our era, the Japanese had a custom: when the military commander passed away, all his servants were buried alive along...

Snakebite

On an exotic island you were bitten by a venomous snake. Fortunately, in the nearest settlement there was a doctor. He examined the wound and...

The Million Dollar Simple solution

In the States there were two large firms engaged in the publication of yellow pages every month. Many office workers bought two directories at...

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...