What is the below Rebus indicate?

If there are fifteen crows on a fence and the farmer shoots a third of them, how many crows are left?

A boy collects white seashells from the sea and brings them home every night. When he has enough of them, he decides to sell them to a trader.

The trader is ready to buy the shells and he asks the boy about the quantity. At this, the boy starts calculating. He has a giant box that contains 3 mini boxes. Two of them have another mini box inside. If the giant box can hold 50 shells, how many brown shells can he sell to the trader?

What has to be broken before you can use it?

Double it and multiply it by 4. Then divide it by 8 and you’ll have it once more. What number is it?

Which country gets ill every time?

By removing one matchstick and adding one matchstick, can you convert the word "ZOO" to an animal name?

Rectify the following equality 101 - 102 = 1 by moving just one digit.

You knock a Table over in the library, and suddenly 20 eyes are looking at you.

I am quite hot but become too cold if you remove the first two letters. What am I?