John was piloting a plane behind a car but was never able to overtake it. Why?

John enters a small room. The Door Closes.
When the door opens, John is in a larger room.

Explain?

I have a hole in my back and legs I lack.
I live where I can’t breathe and I eat without teeth.
What am I?

A new Engineering building containing 100 offices had just been completed. John was hired to paint the numbers 1 to 100 on the doors. How many times will John have to paint the number nine (9)?

I am a normal creature, but I have five hands. I can even have more but even then I will be considered normal.

Who am I?

You enter your friend's room. He is not in his room. Although you see that on the bed there are two dogs, five cats, two giraffes and three pigs. Also, a couple of chickens and ducks are flying in the room.

Calculate the number of legs standing on the floor.

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

It comprises roots which nobody sees,
Much taller than those trees,
Up and up it goes,
Still it never grows?

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’m light as a feather, yet the strongest person can’t hold me for five minutes. What am I?