1. Mary’s husband is the grandfather of my son. Who am I?
　　2. John’s son is the father of my son. Who am I?
　　3. My father has not any brothers; my mother has not any brothers, either, but I have many uncles. Who are they?
　　4. Mr Zhao is my father, but I’m not his son. Who am I?
　　5. There are two people in the room. The little one is the son of the big one, but the big one is not the father of the little one. Why?
　　6. What has three hands but only one face?
　　7. A boy is sitting on the right of a girl. A girl is sitting on the right of a girl. Two girls are sitting on the left of a boy. How many children are there in all(总共)?
　　8. Tom, George, Sally and Ann are brothers and sisters. I don’t know how old each of them is. I only know that one of them is eighteen, one is fifteen, one of the boys is sixteen and one of the girls is seventeen. I also know that Tom is older than Sally, but Ann is younger than her. How old is Tom? How old is George? How old is Sally? How old is Ann?
　　9. The more there is of it, the less you see. What is it?
　　10. It is yours, but others use it more than you do. What is it?
　　11. What grows larger the more you take it? (You can answer it in Chinese.)
　　12. From what number can you take half and leave nothing?
　　13. Who is always wearing a black coat?
　　14. Who(谁) can you see in the alphabet?
　　15. How can 11 and 2 make 1?
　　
　　Key:
　　1. You are Mary’s child.
　　2. You are John’s son.
　　3. They are aunts’ husbands.
　　4. You are his daughter.
　　5. Because the big one is the mother of the little one.
　　6. A clock.
　　7. There are three children.
　　8. Tom is eighteen. George is sixteen. Sally is seventeen. Ann is fifteen. 9. Darkness(黑暗).
　　10. Your name.
　　11. A hole(洞).
　　12. The number “8”.
　　13. Mr Black.
　　14. You and I.
　　15. Eleven o’clock plus two hours is one o’clock.