Critical Thinking Puzzles

A blindfolded man is asked to sit in the front of a carrom board. The holes of the board are shut with lids in random order, i.e. any number...

What are the chances that at least two out of a group of fifty people share the same birthday?

Find sum of digits of D. Let A= 1999 1999 B = sum of digits of A, C = sum of digits of B, D = sum of digits of C.

If you take a marker and start from a corner on a cube, what is the maximum number of edges you can trace across if you never trace across t...

In a hotel, rooms are numbered from 101 to 550. A room is chosen at random. What is the probability that room number starts with 1, 2 or 3 a...

Many years from now, two classmates met in a street. The following is part of their discussion. Student 1: Yes, I'm married and have thr...

A soldier has been captured by the enemy and is sentenced to die. His captors say: "You may make a statement. If you tell a lie, you wi...