If I remove one from eleven it becomes Ten and if I remove one from nine also becomes Ten. How?

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?

I cannot talk, but I always reply when spoken to. What am I?

Can you find out the next digit in the following series ?

0, 0, 1, 3, 2, 6, 3, 9, 4, 12, 5, ?

Prove that the below maths equation is true.

8 + 8 = 91

What can you serve, but never eat?

If you read clockwise, you can form a word by inserting three missing letters in the picture given below. Can you do it?

In a chess board, the queen piece can move horizontally, vertically and diagonally freely. The picture represents the same.Can you place 8 queens on the board in a manner that none of the queens can attack each other?

A tree doubled in height each year until it reached its maximum height over the course of ten years. How many years did it take for the tree to reach half its maximum height?

How many triangles can you count in the figure given?