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

A person was found dead on a big green land with no trees or buildings around. When the police arrived, they found a piece of rock lying next to him and the man was wearing clothes comprising of red, blue and yellow colours.

Can you tell who the person is and what was the cause of death?

During which month do people sleep the least?

The dirtier I get, the whiter I look. Who am I?

If you say my name, I will no longer exist. What am I?

I have no life, but I can die. What am I?

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?

There are four 3-link chains. All you have to do is join them into a big 12-link chain. For joining two closed links, one of the links must be cut and placed onto the other link for closing.

How many minimum links will you have to cut to make the big chain?

I am white when I am dirty, and black when I am clean. What am I?

What is the riddle which can be asked all day with a different correct answer each time.