Samuel was out for a walk when it started to rain. He did not have an umbrella and he wasn't wearing a hat. His clothes were soaked, yet not a single hair on his head got wet. How could this happen?

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

What is more useful when it is broken?

If eleven plus two equals one, what does nine plus five equal?

I make two people out of one. What am I?

What breaks yet never falls, and what falls yet never breaks?

How can you take 2 from 5 and leave 4?

I have an eye but still cannot see.

Who am I?

While going to your grandmother's house, you counted Twenty houses on the right side. While returning back to your home, you counted Twenty houses on the left side.

How many houses are there between your home and your grandmother's home?

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?