If two's company, and three's a crowd, then whats four and five ?

A girl is twice as old as her brother and half as old as her father. In 50 years, her brother will be half as old as his father. How old is the daughter now?

I am a number I am not an odd number I am higher than 90 I am not higher than 100 If you subtract me from 100, you get nothing. What number am I?

What can you hold in your right hand, but never in your left hand?

You find yourself in a strange place guarded by two guards.One of the guard always say truth while other always lies.You don't know the identity of the two.You can ask only one question to go out from there. What should you ask?

Prove that twice of ten is the same as twice of eleven.

What have one eye but still cannot see?

Outside a tattoo artist's shop, there was a signboard which read 'I make tattoos on only them who do not tattoo themselves'.

Reading it what do you think, does the tattoo artist tattoo himself?

Two batsman each on 94 runs. Seven runs needed to win in last 3 balls. Both make 100*. How?

How can a man go eight days without sleep?