Replace the question mark with the correct number.

What is the below Rebus indicate?

When my father was 31 I was 8. Now he is twice as old as me. How old am I?

Can you place three balls such that the equation shown in the picture holds true?

What do you think with the below Picture ?

A professor thinks of two consecutive numbers between 1 and 10.
'A' knows the 1st number and 'B' knows the second number

A: I do not know your number.
B: Nor do I know your number.
A: Now I know.

What are the four solutions for this?

What does this Rebus Picture means ?

Why are all black people so quick ?

As we know that white starts the game of chess. Can you find the scenario shown in the picture below is possible when all the white pieces are at the original place while the black pawn is not as in the below picture?

There are two words one resembles the "state of rest" and the other is related to "writing/reading material".

Can you name these two words which also sound similar?