There's one "sport" in which neither the spectators nor the participants know the score or the leader until the contest ends.

What is it?

How can you make number one disappear by adding something to it?

How many triangles do you see in the picture puzzle below?

What is the best name for Gambler Girl Friend?

Can you find out the number that should replace the question mark with a valid reason?

Can you think of a smallest +ve number such that if we shuffle the digits of the number, the new number becomes double the original number?

A rain drop fell from one leaf to another leaf and lost 1/4th of its volume. It then fell to another leaf and lost 1/5th of the volume. It again fell on another leaf and lost 1/5th of the volume.



This process kept repeating till it fell on the last leaf losing 1/75th of its volume.



Can you calculate the total percentage of loss from the initial volume when the drop has fallen to the last leaf accurate up to two decimal places?

What is the next number in the series?

15 29 56 108 208 ?

What is black when you buy it, red when you use it, and gray when you throw it away?

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