How can a man go eight days without sleep?

Replace the 'X' with any mathematical symbol to make the expression equal to 111.

18 X 12 X 2 X 3 = 111

A finger goes in me. You fiddle with me when you're bored. The best man always has me first. What am I?

What is in seasons, seconds, centuries and minutes but not in decades, years or days?

You are given with the following sum. Each of the letters can be decoded as a digit. If we tell you that D = 5, then can you solve it entirely?

DONALD
+GERALD
=ROBERT

Count the squares in the matchstick puzzle below?

John was so frustrated to be the suspect of being a sleeper terrorist that he shoot himself right between the eyes with a revolver in his toilet. The revolver and the bullets were accurate. Minutes later John walks out of the toilet unharmed.
How can this be possible?

Look at the picture and find out which square is not linked with any of the other squares.

Before Mount Everest was discovered, what was the highest mountain in the world?

In a stable, there are men and horses. In all, there are 22 heads and 72 feet. How many men and how many horses are in the stable