Answer:
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?
What can you hold in your right hand but never in your left hand?
First I threw away the outside and cooked the inside then I ate the outside and threw away the inside. What did I eat?
4 rubber ducks were floating in the bathtub, 2 floated away and 2 drowned. How many ducks are still alive?
Three doctors said that Bill was their brother. Bill said he had no brothers. Who was lying?
By Moon or by Sun, I shall be found. Yet I am undone, if there's no light around