Answer:
There are 20 birds in a tree. A man comes and shoots one of the birds. How many birds are left?
What is as big as you are and yet does not weigh anything?
What can fill an entire room without taking up any space?
When does 4 - 1 = 5 ?
A girl is sitting in a house at night that has no lights on at all. There is no lamp, no candle, nothing. Yet she is reading. How?
What is it that makes tears without sorrow. And takes its journey to heaven?