How can you write nineteen in a manner that if we take out one, it becomes twenty?

Which alphabet letter is a question?

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

A man was just doing his job when his suit was torn. Why did he die three minutes later?

Can you count the number of matches in the picture below ?

Solve the equation by replacing the alphabet with numbers.

MOM + MOM + NO = BOOK=

This is a most unusual paragraph. How quickly can you find out what is so unusual about it? It looks so ordinary, you'd think nothing was wrong with it. Actually, nothing IS wrong with it. But it is not as ordinary as you might think. If you think about it for a bit, you will find out why it is truly so unusual. So what is it? What is so unordinary about this paragraph?

How can a man go eight days without sleep?

Why do we preferably have round manhole covers and not square ones?

Forwards I am heavy, backward I am not. What am I?