Answer:
There are 5 sisters in a room: Ann is reading a book, Margaret is cooking, Kate is playing chess, Marie is doing the laundry. What is the fifth sister doing?
What is a ten letter word that starts with gas?
How do you discover something that does not exist?
Mr. Smith has two children. If the older child is a boy, what are the odds that the other child is also a boy?
What always comes into a house through the keyhole?
What is yours but only used by others?