What flies without wings?
What is harder to catch the faster you run?
What gets whiter the dirtier it gets?
What gets broken without being held?
What is weightless but it needs two person to hold it?
What three letters change a boy into a man?
What gets sharper the more you use it?
What can you share and still have all for yourself?
What can always be measured but never can be seen?
A man takes a barrel that weighs 20 pounds and then puts something in it. It now weighs less than 20 pounds. What did he put in the barrel?