Take away the whole and some still remain. What is it?

Can you convert the number zero(0) into a positive number using just one mathematical operator ?

Yesterday I fell from 30 feet high ladder but I don't get hurt. Why?

Usually, a boxing match consists of twelve rounds. In a particular friendly match between two heavyweights, the match was finished in the ninth round itself as one of the boxers knocked out the other one.

But, in that fight, no man threw even a single punch.

How can this be possible?

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

You are trapped in a room with two doors. One leads to certain death and the other leads to freedom. You don't know which is which.
There are two robots guarding the doors. They will let you choose one door but upon doing so you must go through it.
You can, however, ask one robot one question. The problem is one robot always tells the truth, the other always lies and you don't know which is which.
What is the question you ask?

Take 9 from 6, 10 from 9, 50 from 40, and leave 6.

How Come ??

"That Restaurant always remains crowded. This is the reason why nobody goes there".

Can you find a flaw in this statement?

How could a baby fall out of a twenty-story building onto the ground and live?

By moving just one matchstick, you need to make the below statement true. Can you do it?