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### puzzle

1. 1. PuzzlesBoyu Li
2. 2. There is a very slippery wall that is 11feet high. A snail began to climb thewall. It can climb about 5 feet in onehour, but the snail need one hour restafter climbed an hour. During the hourfor rest, it slipped down about 3 feet.So how many hours Snails need toclimb to the top of the wall?
3. 3.  The following is eight letters , find out what the last letter is? O,T,T,F,F,S,S,E,？
4. 4.  One day, A man came to John’s shop, and he bought a T-shirt. The T-shirt cost 15 euro, and the retail price is 21 euro. The man give john 50 euro, but john doesn‘t have change, So he went to next door for change. After the man leave, john’s neighbor find out the 50 euro is counterfeit. So john pay another 50 euro to he’s neighbor. Q: How much is john loss??
5. 5.  There has 6 cups in a row, 3 with water and 3 is empty. Can you just do one move to make: There do not have two empty cup together. And do not have two cup with water together.
6. 6.  If there has 4 houses A,B,C,D in a Row and  A and B is neighbor  A and D is not neighbor  D and C is not neighbor Q: who is C’s neighbor
7. 7. 1 1 2 2 3 ? 32 5 1 4 0 3 9
8. 8.  Here has 12 balls, one of them has different weight then others. If give you a balance, Can you find out the different ball and use balance three times.
9. 9. 1 1 1 1 1 1 1 A B 1 1 1 11 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 11 1 1 1 1 11 1 1 1 1 ? 1 1 C D 1 1
10. 10.  The boarder of A and B country is a bridge, there have a guard stand in middle of bridge to stop people go through the bridge. If people come from A, the guard will stop him and send him back to A. If people come from B, the guard will send him back to B. To cross the bridge at least need 10 minutes. The guard only can leave the outpost in 8 minutes.Q: How to cross the bridge.
11. 11. There is a very slippery wall that is 11 feet high. A snail began to climb the wall from the bottom. It can climb about 5 feet in one hour, but the snail need one hour rest after climbed an hour. During the hour for rest, it slipped down about 3 feet. So how many hours Snails need to climb to the top of the wall?1. 5-3=22. 11 – 5 = 63. 6 / 2 = 3 hours4. 3 +1 = 4 hours
12. 12.  The following is eight letters , find out what the last letter is? O ne T wo T hree F our F ive S ix S even E ight N ine
13. 13.  One day, A man came to John’s shop, and he bought a T-shirt. The T-shirt cost 15 euro, and the retail price is 21 euro. The man give john 50 euro, but john doesn‘t have change, He went to next door for change. After the man leave, john’s neighbor find out the 50 euro is counterfeit. So john pay another 50 euro to he’s neighbor. Q: How much is john loss?? Ans: 44 The man get a T-shirt and 29 euro change. That is 15 + 29 = 44
14. 14.  There has 6 cups in a row, 3 with water and 3 is empty. Can you just do one move to make: There do not have two empty cup together. And do not have two cup with water together.
15. 15.  If there has 4 houses A,B,C,D in a Row and  A and B is neighbor  A and D is not neighbor  D and C is not neighbor Q: who is C’s neighbor AB C D AB D C C AB D * D C AB
16. 16. 1 1 2 2 3 ? 3 2 5 1 4 0 3 912 + 2 + 1 = 1515 + 1 + 5 = 2121 + 2 + 1 = 2424 + 2 + 4 = 3030 + 3 + 0 = 3333 + 3 + 3 = 39
17. 17.  Here has 12 balls, one of them has different weight then others. If give you a balance, Can you find out the different ball and use balance three times. • Divide 12 balls into 3 groups • Pick any two groups and weighing them: • If there are same, pick any two balls in the third group and weighing them: • If the weight is same, another one is different. • If the weight is different, pick one from them and weighing with ball from other group.
18. 18. A B1 1 1 1 1 1 1 1 1 1 1 1 1 1 11 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 11 11 1 1 1 1 ? C D The same cell appeared in first table 1 1 and second table, will not appeared 1 1 in the third table.
19. 19.  The boarder of A and B country is a bridge, there have a guard stand in middle of bridge to stop people go through the bridge. If people come from A, the guard will stop him and send him back to A. If people come from B, the guard will send him back to B. To cross the bridge at least need 10 minutes. The guard only can leave the outpost in 8 minutes.Q: How to cross the bridge.Answer: if from A to B, when the guard leave the outpost, startwalk to B, after 7 minutes, you have already pass the outpost,and then turn round, forward to A. If you meet the guard whenhe back, he will send you to B.