Can you find out who is the kidnapper in below Picture and why, Explain ?

If it took eight men ten hours to build a wall, how long would it take four men to build it?

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?

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

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

Baseball bat and ball cost $100. If the bat cost $99 more than the ball, what is the cost of each?

If 5 cats catch 5 mice in 5 minutes, how long will it take one cat to catch a mouse?

The person who makes it has no need for it; the person who buys it has no use for it. The person who uses it can neither see nor feel it. What is it?

An artist while painting a scenic beauty, decides to paint three layers of blue colour on the sky.

Which layer will go on the first?

There was a man he lives in a hotel each morning he presses the first floor button each evening if there is a person in the elevator he asks him to press the 10 floor button if there is no one in the elevator he takes the stairs why.