There was a man he lives in a hotel each morning he presses the first floor button each evening if there is a person in the elevator he asks him to press the 10 floor button if there is no one in the elevator he takes the stairs why.

What is the centre of gravity?

What time is it when an elephant sits on a fence?

A rubber ball keeps on bouncing back to 2/3 of the height from which it is dropped. Can you calculate the fraction of its original height that the ball will bounce after it is dropped and it has bounced four times without any hindrance ?

There is a square of a particular number which when doubled, becomes 7 more than its quarter.

Can you find the number?

How can you spell "White of an egg" in one word?
Hint: I know you can spell coke, poke, and joke.

Complete the series by replacing "?" with the correct number.

ST ND RD TH '?'

If a wheel has 54 spokes, how many spaces are there between the spokes?

My thunder comes before the lightning; my lightning comes before clouds; my rain dries all the land it touches. What am I?

How much will a 38° angle measure when looked at under a microscope that magnifies ten times?