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...

King Akbar’s Line

One day the Great Akbar drew a line on the floor and asked his sage Birbal to shorten it without touching and ...
Cheops pyramid height 139 m

Measuring the Great Pyramid

While the famous Greek philosopher Thales of Miletus was in Egypt, he was asked to find out the height of the Great Cheops pyramid. How could...
Ошибка выжившего. Творческое решение проблем

Survivorship bias and the flip side of things

During World War II, the Hungarian mathematician Abraham Wald, who worked in the SRG laboratory in New York, considered how to minimize bomber losses...
Ancient gold coin. Creative Puzzle

Egyptian coin. Mindfulness Challenge

An archeologist claims he found a Roman coin dated 46 B.C. in Egypt.  Note: Roman coins can really be found in Egypt How much should...

Ship Ladder Puzzle

A ship is at anchor. Over its side hangs a rope ladder with rungs a foot apart. The tide rises at the...

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...

A cup of tea

A man called to a waiter in a restaurant, "There's a fly in my tea!" The waiter replied, "I will bring you a fresh...
Vladimir Rumyantsev. Cats

A challenge for the fisherman – solution of practical problem

One fisherman bought himself a new fishing rod with 5 feet long. He has to commute home by public transport, where it is forbidden to...
Dzhonatan Uolstenholm. Creative Puzzles

Don’t Rush To Change The World

  Once upon a time, there was a king who ruled a prosperous country. One day, he went for a trip to some distant areas...

Successful interview

Interviewer at a reputed business school said to the student "I shall either ask you ten easy questions or one really...

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...