Answer:
How can you place a pencil on the floor so that no one can jump over it?
How do you blink twice without blinking twice?
How could all of your cousins have an aunt who is not your aunt?
There are 20 birds in a tree. A man comes and shoots one of the birds. How many birds are left?
How do you drop an egg and never break it?
By Moon or by Sun, I shall be found. Yet I am undone, if there's no light around