The more you take me, the more you leave me behind.
Who Am I?

When is the top of a mountain similar to a savings account?

When Jack was six years old he hammered a nail into his favourite tree to mark his height. Ten years later at age sixteen, Jack returned to see how much higher the nail was. If the tree grew by five centimetres each year, how much higher would the nail be?

If 2 workers can complete painting 2 walls in exactly 2 hours.

How many workers would be needed to paint 18 walls in 6 hours?

There was a competition where the contestants had to hold something. At the end of the event, the winner was a person who had no hands or feet. What was it that the contestants had to hold?

Two in a corner, one in a room, zero in a house, but one in a shelter. What am I?

Your mother’s brother’s only brother-in-law is asleep on your couch. Who is asleep on your couch?

How many minutes are there in Feb 2017?

Note: The shortest answer is the correct answer.

It's a protector.
It sits on a bridge.
One individual can see directly through it, while others wonder what it hides.

What is it?

You have a basket containing ten apples. You have ten friends, who each desire an apple. You give each of your friends one apple.
Now all your friends have one apple each, yet there is an apple remaining in the basket.
How?