Critical Thinking Puzzles

You are making an opaque cube (ie you cannot see through its sides). It can be any size that you want it to be. Where do you place the c...

Three boxes are all labeled incorrectly, and you must get the labels right. The labels on the boxes read as given below. To gain the inf...

This is a story about three people (A, B and C) crossing a desert. A hated C and decided to kill him - he poisoned the water in his sack...

A 120 wire cable has been laid firmly underground between two telephone exchanges located 10km apart. Unfortunately after the cabl...

One absentminded ancient philosopher forgot to wind up his only clock in the house. He had no radio, TV, telephone, internet, or any othe...

A merchant had a 40 kg measuring weight that broke into four pieces as the result of a fall. When the pieces were subsequently weighed, i...

The Hilton Hotel reserves all its 101 rooms for travelers and each guest is assigned a room in advance. The first guest arrives but has f...