Best riddles for teens

It is young but not that old. It gives you money. What is it?

What has a head, a tail, is brown, and has no legs?

What is harder to catch the faster you run?

A horse is on a 24 foot chain and wants an apple that is 26 feet away. How can the horse get to the apple?

If will follow you for 1000 miles but not miss home. It desires neither food nor flowers. It fears not water, fire, knives, nor soldiers. But it disappears when the sun sets behind the western mountains. Who Am I?

What am I?

What is the word that is spelled incorrectly in all dictionaries?

What is as big as you are and yet does not weigh anything?

There are 20 people in an empty, square room. Each person has full sight of the entire room and everyone in it without turning his head or body, or moving in any way (other than the eyes). Where can you place an apple so that all but one person can see it?

The digits 0-9(0,1,2,3,4,5,6,7,8,9) can be rearranged into 3628800 distinct 10 digits numbers. How many of these numbers are prime?