what does the below rebus means?

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

Can you solve this amazing hard number series problem?
7, 8, 10, 12, 16, 18 ?

The day after tomorrow will be three days before Tuesday. Can you find out what is today?

At a party, there are five people and a whole round cake lying at the centre of the table. Only four people will make a cut and take their piece and the last one will get the remaining piece on the table. How can they make sure that everyone gets a 1/5th of the piece?

Count the number of triangles in the below picture?

In 1990, a person is 15 years old. In 1995, that same person is 10 years old. How can this be?

As easy as you can get into me, it is as hard to get out of me.

Do you know what I am?

What does this rebus mean?

O
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TIME

What does this rebus means ?