What word begins and ends with an E, but has only one letter?

One fine day, an intellectual man came to the emperor's court with the aim of testing Birbal's wittiness. In order to do this, he challenged Birbal to answer his question and hence prove that he was as intelligent and witty as he was said to be.
He asked Birbal, Do you want me to ask one difficult question or a hundred easy ones?
Since both Akbar and Birbal had had a tough day and were eager to leave, Birbal hastily told the intellectual to ask him a single difficult question.
Intellectual: OK. Tell me what came first into the world, the egg or the chicken?
Of course, the chicken, Birbal replied with a smile.
This time with a note of victory in his voice, the intellectual asked Birbal, How will you demonstrate that?
What did Birbal say?

What number comes next in the series?

5 15 5 18 5 24 14 20 _

What Adam and Eve do not have but the rest of the people have?

It belongs to you, but other people use it more than you do. What is it?

A man dies of old age on his 25 birthday. How is this possible?

A father's child, a mother's child, yet no one's son.

Who am I?

A cat had three kittens: Snophy, Topsy and Jorden. What was the mother's name?

A wealthy man lives alone in a small cottage. Being partially handicapped he had everything delivered to his cottage. The mailman was delivering a letter one Thursday when he noticed that the front door was ajar. Through the opening he could see the man's body lying in a pool of dried blood. When a police officer arrived he surveyed the scene. On the porch were two bottles of warm milk, Monday's newspaper, a catalog, flyers, and unopened mail. The police officer suspects it was foul play. Who does he suspect and why?

In the below-given picture of a pretty girl, there is something wrong. Can you find out what it is?