Answer:
What goes up the hill and down the hill, And spite of all, yet stand still?
The more that there is of this, the less you see. What is it?
What always comes into a house through the keyhole?
A man is able to contact his long lost brother who has never met. They agree to meet. When the brother arrives he is able to instantly pick him out from the crowd. How is that possible?
When can you add two to eleven and get one as the correct answer?
The sun bakes them, The hand breaks them, The foot treads on them, And the mouth tastes them. What are they?