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

What work can one never finish?

One day, all the courtiers from Akbar's court were gathered in the assembly hall when one of them told the Emperor that all his valuables had been stolen by a thief the previous night.
This shocked the Emperor to his core as the place where that courter stayed was the most secured in the kingdom. The Emperor thought that it is not at all possible for an outsider to enter into the courtier's house and steal the valuables. Only another courtier could commit this crime. He quickly called Birbal to identify the thief.
Birbal thought for a while and successfully solved the mystery by identifying the thief in just one statement.
What did Birbal say?

Spelt forwards I’m what you do every day, spelled backwards I’m something you hate. What am I?

There are 3 apples in the basket and you take away 2. How many apples do you have now?

How will you measure 15 minutes using two hourglasses of 7 minutes and 11 minutes respectively?

Can you make numbers like 24, using numbers 3,3,7 & 7 with any arithmetic operator?

What does below rebus means ?

In the figure, you can see nine stars. What you have to do is connect all of them by using just four line and without lifting your hand i.e. in a continuous flow.

A woman lives in a Tall building thirty-six floors high and served by several elevators which stop at each floor going up and down. Each morning she leaves her apartment and goes to one of the elevators. Whichever one she takes is three times more likely to be going up than down. Why?