Recall Your Childhood Days With This Riddle And See Whether You Were A Genius Then Or You're Now 

It looks familiar. 

Ok, if you are an adult now. But try to solve the riddle below and check your mathematical abilities.

If you find it a child's play, don't complain. It will help you to recall your childhood days when it was fun solving puzzles which appeared in newspapers and magazines.

But if you find it tough, then you need to be tutored in maths.

Try it, anyway.