On rolling two dices (six-sided normal dice) together, what is the probability that the first one comes up with a 2 and the second one comes up with a 5?

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

Name a key which is hardest to turn.

The measurement of time, That can't be found on a clock, But can be looked upon on a map.

Who is He ?

You Throw The Outside, Cook The Inside
Eat The Outside, Throw The Inside.

What Is It?

You are presented with three boxes. One of them has a red ball inside and the other two have a black ball inside each of them. You are asked to pick up the one with red ball and you pick one. Now, one of the other boxes is opened and it is found to have a black ball.

You are presented with a chance to change your box with the one that is left closed. Will you change your box? Why or why not?

There are 20 people in an empty, square room. Each person has full sight of the entire room and everyone in it without turning his head or body, or moving in any way (other than the eyes). Where can you place an apple so that all but one person can see it?

Take away my first letter, then take away my second letter. Then take away the rest of my letters, yet I remain the same. What am I?

Can you make the below equation true by using any three numbers from "1, 3, 5, 7, 9, 11, 13 and 15"?

( ) + ( ) + ( ) = 30

They are the five precious gems of an everyday sort and all can be found on a Tennis Court. Who are they?