What's the only room from which no one can enter or leave

A woman lives in a skyscraper thirty-six floors high and is 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?

A boy purchased a book from a bookkeeper and gave him $100.
The cost of the book is $50 but the bookkeeper has no change, so he gets the change from the next shop and returns the boy his $50.

After some time the next shopkeeper came with the $100 note and told the bookkeeper that the note was a fraud, so he took the money back.

How much loss did the bookkeeper face?

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

Divide 110 into two parts so that one will be 150 per cent of the other. What are the 2 numbers?

In this image, you can see three almost identical Doraemon images. Can you spot the odd one out from them?

What does man love more than life, and hate more than death or mortal strife; that which satisfied men want; the poor have, and the rich require; the miser spends, the spendthrift saves, and all men carry to their graves?

Who has married many women but was never married?

Can you find out a way through which you can make five squares out of the given figure by moving just six match sticks?

Which is faster, Heat or Cold ? Explain.