What is common among 11, 69, and 88?

What does below pictogram mean?

What word is pronounced the same if you take away four of its five letters?

Find the number of squares in the below-given picture.

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?

Can you name some countries which do not have the alphabet 'A' in them?

A girl has as many brothers as sisters, but each brother has only half as many brothers as sisters. How many brothers and sisters are there in the family?

There are 20 people in an empty, square room. Each person has full sight of the entire room and everyone in it without turning his head or body, or moving in any way (other than the eyes). Where can you place an apple so that all but one person can see it?

Can you think of a smallest +ve number such that if we shuffle the digits of the number, the new number becomes double the original number?

Which alphabet letter is a question?