No one wants to have it, but if one got it, he does not want to lose it. What is It?

This puzzle is for Harry Potter fans. Do you know why Tom Riddle is called Lord Voldemort?

What seven-letter word has hundreds of letters in it?

What am I?

What does below rebus means ?

Replace the question mark with the correct number in the below-given picture?

A train full of passengers goes through a tunnel. When the train comes out from the other end, there is no single person on the train.

How did it happen?

If 21x = 79x, what is the value of x?

What can go through glass without breaking it?

Birbal was jester, counsellor, and fool to the great Moghul emperor, Akbar.
The villagers loved to talk of Birbal's wisdom and cleverness,
and the emperor loved to try to outsmart him.
One day Akbar (emperor) drew a line across the floor.
"Birbal," he ordered, "you must make this line shorter, but you cannot erase any bit of it."
Everyone present thought the emperor had finally outsmarted Birbal.
It was clearly an impossible task.
Yet within moments the emperor and everyone else present had to agree that Birbal had made the line shorter without erasing any of it.
How could this be?