37. If three cats can kill three rats in three minutes, how long will it take six cats to kill six rats? (Three minutes)
38. A frog is at the bottom of a 20-feet-deep well. Everyday it jumps two feet high in the air. How soon will it jump out of the well? (It can’t jump out.)
39. Three boys sit in a row. Tom sits on the right end. Ted sits on the right of Sam. Who sits on the left end? (Sam)
40. Two fathers and two sons are fishing. Everyone catches one fish. But they only take home three fish. Why? ( Three are only three people. Grandfather, father and son) 四、字母代码游戏
数字变单词：如果把英文字母同数字对应起来，即A：1；B：2；，C：3…Z：26，那么这些数字串起来代表那个单词？ 1. 20-5-1-3-8-5-18 (teacher) 2. 8-5-12-12-15 (hello) 3. 6-18-9-5-14-4 (friend) 4. 19-20-21-4-5-14-20 (student) 5. 16-1-16-5-18 (paper) 6. 10-15-11-5 (joke) 7. 19-21-16-16-15-18-20 (support) 8. 16-1-20-9-5-14-20 (patient) 9. 18-5-13-1-9-14 (remain) 10. 16-18-5-6-5-18 (prefer) 11. 2-12-9-14-4 (blind) 12. 6-9-14-9-19-8 (finish) 13. 1-4-4-18-5-19-19 (address) 14. 20-15-23-5-18 (tower) 15. 19-13-1-18-20 (smart) 16. 12-1-21-7-8 (laugh) 17. 1-14-25-23-8-5-18-5 (anywhere) 18. 23-1-11-5 (wake)
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19. 6-9-14-1-12-12-25 (finally) 20. 8-5-12-16-6-21-12 (helpful)
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