Answer:
What is as big as you are and yet does not weigh anything?
A man goes upstairs to grab his time machine. He walks downstairs then goes back in time 200 years. Why did he go downstairs?
A grandmother, two mothers and two daughters went shopping together and everyone bought one purse each. How many purses did they bring home all together?
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?
A man is twenty years old but has only had five birthdays. How is that possible?
Almost everyone needs it, asks for it, gives it. But almost nobody takes it.