What is the fastest way to double your money?

Two in a corner, one in a room, zero in a house, but one in a shelter. What is it?

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?

I make a loud sound when I’m changing. When I do change, I get bigger but weigh less. What am I?

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

Can you find the missing letter in the sequence?
S - T - I - L - ? - T - F - Y - C

I live in a bowl. I can swim. I have a tail. I also have fins and big eyes. What am I?

What can go through glass without breaking it?

What number comes next in the series?

5 15 5 18 5 24 14 20 _

What time is it when an elephant sits on a fence?