Answer:
There are 20 birds in a tree. A man comes and shoots one of the birds. How many birds are left?
Railroad crossing without and cars can you spell that without any R's
Six glasses are in a row. The first three are filled with milk and the last three are empty. By moving only one glass, can you arrange them so that the full and the empty glasses alternate?
How can you throw a ball 20 meters, and have it come back to you without hitting anything?
How could all of your cousins have an aunt who is not your aunt?
In birth I spring forth, in life I unfold. In death I wilt and die, but rebirth restores all.