If you say my name, I will no longer exist. What am I?

Aman has 1.15 rupees in his pocket. There are a total of 6 coins in his pocket.

When his friend asked him for a change, he could not give change for a rupee and five paisa.

Can you tell which coins he has?

Below toothpicks/matchsticks indicate the group of fishes moving from west to east direction. Can you make them move from east to west by just moving three toothpicks/matchsticks?

You can see it everyday, But cannot touch it at will. What is it?

The more you take me, the more you leave me behind.
Who Am I?

Can you write down eight eights so that they add up to one thousand?

You are playing as white and given four rooks to checkmate the black king in four moves with the following rules 1. You can place one rook every move and ensure the black king should be in check position.2. After four moves the black king should be in the checkmate position.

Replace the question mark with the correct number in the below-given picture?

Different lights make me strange by changing me into different sizes. What am I?

I am the fastest animal but cannot climb the tree. What am I?