It walks on 4 when its young, walks on 2 when it's older, and walks on 3 when its very old?

The horse jumps over the king.
Strangely there is absolutely no scratch on him.

Can anyone explain, how is this possible?

Make eight squares by moving only two matchsticks.
Note- Square can be of different sizes.

Here is what you have to do. You have to throw a ball as hard as you can but it must return back to you even if it does not bounce at anything. Also, you have nothing attached to the ball. There is no one on the other end to catch that ball and throw it back at you.

How will you do it?

Decode the movie name from the below picture?

How can a man go eight days without sleep?

What has many teeth, but cannot bite?

Can you find a five letter word that is left with only two letters if one is removed?

A boy purchased a book from a bookkeeper and gave him $100.
The cost of the book is $50 but the bookkeeper has no change, so he gets the change from the next shop and returns the boy his $50.

After some time the next shopkeeper came with the $100 note and told the bookkeeper that the note was a fraud, so he took the money back.

How much loss did the bookkeeper face?

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