When I got four, I have it none.
When I got two, I have it some.
When I got none, I have it all.

What is it?

Can you quickly find which two matchstick figures are identical?

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

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?

What is the end of everything?

In front of you, there are 9 coins. They all look absolutely identical, but one of the coins is fake. However, you know that the fake coin is lighter than the rest, and in front of you is a balance scale. What is the least number of weightings you can use to find the counterfeit coin?

There are two dice with empty faces in front of you and a marker. You can mark any number on each of the faces of the two dice, but you have to display all 31 days of the month using the two of them.

Which numbers will you mark on which dice so that you can easily depict all the dates of the month?

I speak without a mouth, and hear without ears. I have no-body, but I come alive with the wind. What am I?

I am not alive, but I grow; I don't have lungs, but I need air; I don't have a mouth, but water kills me. What am I?

How many sides does a circle have?