A rubber ball keeps on bouncing back to 2/3 of the height from which it is dropped. Can you calculate the fraction of its original height that the ball will bounce after it is dropped and it has bounced four times without any hindrance ?

John named his first son Alpha, second Beta, third Charlie and fourth Delta. What is the fifth son's name?

How can a man go eight days without sleep?

Can you solve the rebus below?

Using eight eights and addition only, can you make 1000?

How many people must be gathered together in a room, before you can be certain that there is a greater than 50/50 chance that at least two of them have the same birthday?

I was born in a small house and I live in it all alone. No windows and no doors have been assigned to my house. The only way I can go out is by breaking through the walls of my house.

Who am I?

I have feet, but no legs. Which animal Am I?

I have no life, but I can die. What am I?

Can you arrange four 9's and use at most 2 math symbols, to make the total 100?