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

What is at the end of a rainbow?

In the Chess Board picture below white army is arranged. You need to add a black army on the board such that no piece is under any threat.
Note: Army comprised of 1 king, 1 queen, 2 rooks, 2 bishops, 2 knights, and 8 pawns.

What has lots of eyes, but can’t see?

Why did Navjot Singh Sidhu put the new January calendar in the freezer

There is one thing that goes round the house and also inside the house but never even share a brief touch. What is it?

I am taken from a mine and shut up in a wooden case, from which I am never released, and yet I am used by almost every person. What am I?

Replace each alphabet with the number (1-9) to make the below equation correct.

AB * C = DE - F = GH / I

There are 2 cops parked along a one-way street looking for traffic violations. They spot a taxi driver going in the wrong direction, yet they do nothing.

Why?

Solve this riddle by finding the odd one out from the rest.