What work can one never finish?

If you drop me I’m sure to crack, but give me a smile and I’ll always smile back. What am I?

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

Do you know of a place where the wind blows south and then suddenly shifts direction towards the north?

French Police inspects a room where there are no windows, no doors, no tables and is almost empty expect there is just a puddle of water. They found a dead man who obviously hung herself from the ceiling, but they are not able to figure out how this had happened.

John and Jacob entered the crime scene and easily able to solve the case.

How did the man die?

On a bus, there is a 26-year-old pregnant lady.
A 30-year-old policeman.
A 52-year-old random woman.
And the 65-year-old driver.

Who is the youngest?

A mules travels the same distance daily.
I noticed that two of his legs travels 10km and the remaining two travels 12km.
Obviously two mules legs cannot be a 2km ahead of the other 2.

The mules is perfectly normal. So how come this be true ?

What does below rebus means ?

Can you decipher the below rebus?

PBLUESAISNUERSES

As we know that white starts the game of chess. Can you find the scenario shown in the picture below is possible when all the white pieces are at the original place while the black pawn is not as in the below picture?