Answer:
When does 4 - 1 = 5 ?
There are two sisters: one gives birth to the other and she, in turn, gives birth to the first. Who are the two sisters?
First I threw away the outside and cooked the inside then I ate the outside and threw away the inside. What did I eat?
When is homework not homework?
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?
What do you purposefully put lots of in and on your body, but run away from when you encounter it outside?