You see a boat filled with people, yet there isn’t a single person on board. How is that possible?

When my father was 31 I was 8. Now he is twice as old as me. How old am I?

If you're 8 feet away from a door and with each move you advance half the distance to the door. How many moves will it take to reach the door?

This is a famous paradox which has caused a great deal of argument and disbelief from many who cannot accept the correct answer. Four balls are placed in a hat. One is white, one is blue and the other two are red. The bag is shaken and someone draws two balls from the hat. He looks at the two balls and announces that at least one of them is red. What are the chances that the other ball he has drawn out is also red?

What has many keys but can’t open a single lock?

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

I’m tall when I’m young, and I’m short when I’m old. What am I?

Can you count the number of triangles in the given picture?

We know that the number 7 is the prime followed by a cube. Which next number is also a prime followed by a cube?

I am an odd number. Take away a letter and I become even. What number am I?