Can you arrange four 9's and use at most 2 math symbols, to make the total 100?

Look at the picture and find out which square is not linked with any of the other squares.

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.

Who is that with a neck and no head, two arms and no hands? What is it?

I have Rs.50 and I spend it in the way as below.

What is in seasons, seconds, centuries and minutes but not in decades, years or days?

Why is it very easy to weigh a fish?

You Throw The Outside, Cook The Inside
Eat The Outside, Throw The Inside.

What Is It?

I travel all around the world but always stay in the corner. What am I?

How many people must be gathered together in a room, before you can be certain that there is a greater than 50/50 chance that at least two of them have the same birthday?