What number do you get when you multiply all of the numbers on a telephone's number pad?

Find the next number in the series below

21 32 54 87 131 ?

Different lights make me strange by changing me into different sizes. What am I?

Many have heard it, but nobody has ever seen it, and it will not speak back until spoken to. What is it?

Count the number of squares in the picture below.

It's a test that will check your IQ.

Suppose you have one 11 minute hourglass and one 13 minute hourglass.

Can you measure exactly fifteen minutes using them ?

A man dies of old age on his 25 birthday. How is this possible?

Can you Find and name the hidden bird in the picture below ?

A boy and his father are caught in a traffic accident, and the father dies. Immediately the boy is rushed to a hospital, suffering from injuries. But the attending surgeon at the hospital, upon seeing the boy, says 'I cannot operate. This boy is my son.' How is this situation explained?

Three fair coins are tossed in the air and they land with heads up. Can you calculate the chances that when they are tossed again, two coins will again land with heads up?