Here is what you have to do. You have to throw a ball as hard as you can but it must return back to you even if it does not bounce at anything. Also, you have nothing attached to the ball. There is no one on the other end to catch that ball and throw it back at you.

How will you do it?

By moving exactly three matchsticks can you make the below equation true.It can be solved by 3 ways.

A man stands on one side of a river, his dog on the other. The man calls his dog, who immediately crosses the river without getting wet and without using a bridge or a boat. How did the dog do it?

How will you measure 15 minutes using two hourglasses of 7 minutes and 11 minutes respectively?

Can you find out the missing number?

? 4 5 3 5

9 5 7 10 3

Find the next number in the sequence

1, 2, 6, 21, 88, __?

Can you discover the missing number in this series?

37, 10, 82
29, 11, 47
96, 15, 87
42, ?, 15

Find the next number in the series below

21 32 54 87 131 ?

I am the one who remains awake when you sleep. But I need to rest when you awake. Who Am I?

A 52% bias toss for head using the 51% tail bias coin was done to obtain a fair result.

Can you find how bias is the floor in this case?