(1) John was 40 when his son was 20. Now John is 80, what is the age of his son?

(2) A burning  candle reduces to half of its length in 10 minutes. When will the candle finish completely?

(3) While going towards a river, a tiger saw 8 elephants, on the back of each, there were two monkeys sat, each monkey carries two parrots. How many ANIMALS were going toward the river?

(4) Names of a God,a planet and a metal are same. What is that?

(5) What is the thing when bought,it is black, red when used and gray when had been used?

(6) What does a scientist say when he see two atoms of Helium?

True/False Questions:

(7) A coin and a feather were released simultaneously from the same height. Feather which reach the ground first if the experiment is performed in vacuum. (True/False)

(8) A real number when divided by a real number will always give a real number.(True/ False)

(9) There are only three colours in mobile screen display.(True/False)

(10) If you start saving money from first day of month from $1. Each day you save double the money of the previous day\\\\\\\'s saving. In a month you would have saved enough money to buy a luxury car.

(True /False)