想去花街的进来，高盛面试题：

25　匹马，要用赛马的方式决出前3名，　5条赛马道，每次赛5匹（　无时钟，只知排名），要赛几次？

所有跟帖： 

• 是问最少几次吧？ -A-Momy- ♀ (0 bytes) () 04/20/2010 postreply 19:12:55

• 4D4D -Lily3- ♀ (0 bytes) () 04/20/2010 postreply 19:14:36

• 11 -A-Momy- ♀ (38 bytes) () 04/20/2010 postreply 19:27:12

• you are always right. but I only have elem level and got the sam -janeice65- ♀ (0 bytes) () 04/20/2010 postreply 20:38:30

• 这些题目应该考美国小学生, 让他们每个人都学会, -说不完的家务事- ♀ (35 bytes) () 04/20/2010 postreply 19:26:58

• 8 -morning3evening4- ♂ (0 bytes) () 04/20/2010 postreply 19:39:31

• explanation... -A-Momy- ♀ (0 bytes) () 04/20/2010 postreply 19:48:14

• 5 groups--take the first 3 from each group. -Morning3evening4- ♂ (382 bytes) () 04/20/2010 postreply 20:02:14

• wrong logic. -A-Momy- ♀ (121 bytes) () 04/20/2010 postreply 20:05:21

• If it is in the 4th or 5th position in the group, they are out a -Morning3evening4- ♂ (0 bytes) () 04/20/2010 postreply 20:08:05

• yeh. -A-Momy- ♀ (0 bytes) () 04/20/2010 postreply 20:12:18

• 6 -事事无为- ♀ (0 bytes) () 04/20/2010 postreply 19:40:51

• stand here -729418- ♀ (0 bytes) () 04/20/2010 postreply 19:51:32

• didn't mean 6. -729418- ♀ (0 bytes) () 04/20/2010 postreply 19:53:59

• 不是淘汰赛，6不可能吧？ -A-Momy- ♀ (0 bytes) () 04/20/2010 postreply 20:01:40

• 为什么不能是淘汰赛，又没说！哈哈哈~~~~~~~~ -事事无为- ♀ (0 bytes) () 04/20/2010 postreply 20:07:38

• 淘汰赛不能保证前3名是真的前3名。 -A-Momy- ♀ (0 bytes) () 04/20/2010 postreply 20:08:55

• 干嘛想这么复杂：）））） -事事无为- ♀ (24 bytes) () 04/20/2010 postreply 20:10:42

• 感觉是6次。预赛马好像每次决出一个。第6次是决赛。 -eomom- ♀ (0 bytes) () 04/20/2010 postreply 22:38:18

• 7 -漫游68- ♀ (0 bytes) () 04/20/2010 postreply 19:43:02

• stand here -729418- ♀ (0 bytes) () 04/20/2010 postreply 19:53:17

• 7 -微风拂煦- ♀ (0 bytes) () 04/20/2010 postreply 19:58:15

• 再玩会儿，11：00　公布答案。 -Lily3- ♀ (0 bytes) () 04/20/2010 postreply 19:44:10

• Math can be so fun!Give you the thrill.. -Lily3- ♀ (0 bytes) () 04/20/2010 postreply 19:46:48

• Only fun is not enough--GS is in trouble now.:). -Morning3evening4- ♂ (0 bytes) () 04/20/2010 postreply 19:47:51

• 呵呵，这题光给次数不大可能是正确答案吧？ -听听意见- ♀ (0 bytes) () 04/20/2010 postreply 19:46:53

• 7? -2012- ♂ (0 bytes) () 04/20/2010 postreply 19:54:56

• 答案是 -Lily3- ♀ (227 bytes) () 04/20/2010 postreply 20:01:13

• that's 7 -729418- ♀ (0 bytes) () 04/20/2010 postreply 20:03:04

• her logic is wrong. -A-Momy- ♀ (0 bytes) () 04/20/2010 postreply 20:04:23

• Her logic is right, but the number is wrong. -baydad- ♂ (0 bytes) () 04/20/2010 postreply 20:08:53

• wrong logice -A-Momy- ♀ (178 bytes) () 04/20/2010 postreply 20:11:01

• 一盆浆糊。 -漫游68- ♀ (0 bytes) () 04/20/2010 postreply 20:14:42

• lol -A-Momy- ♀ (0 bytes) () 04/20/2010 postreply 20:18:53

• 想反了。 -A-Momy- ♀ (0 bytes) () 04/20/2010 postreply 20:23:59

• 是。假设前提是每匹马每次跑的速度一样。 -漫游68- ♀ (0 bytes) () 04/20/2010 postreply 20:11:27

• Wrong logic, for example -oops_yz- ♀ (97 bytes) () 04/20/2010 postreply 20:39:02

• 5组要塞5次呢。 -A-Momy- ♀ (63 bytes) () 04/20/2010 postreply 20:03:36

• the logic is right, only these horses can be top 3. -729418- ♀ (0 bytes) () 04/20/2010 postreply 20:06:11

• no no. -A-Momy- ♀ (0 bytes) () 04/20/2010 postreply 20:08:03

• doesn't matter, because the first 3 is faster than last two. -janeice65- ♀ (133 bytes) () 04/20/2010 postreply 20:43:54

• Wrong--only 5 lanes available. The 1st round take 5 times. -Morning3evening4- ♂ (0 bytes) () 04/20/2010 postreply 20:04:27

• 还以为你有GS的答案呢：（ -听听意见- ♀ (0 bytes) () 04/20/2010 postreply 20:07:50

• 事实每组只决定一个第一。最后决赛，就认定6次，哈哈。。 -eomom- ♀ (0 bytes) () 04/20/2010 postreply 22:45:07

• 7. 5 for each one. Then 5 first from each group. Then the last -baydad- ♂ (51 bytes) () 04/20/2010 postreply 20:04:13

• 该打该打，要不然说不敢发帖 -Lily3- ♀ (174 bytes) () 04/20/2010 postreply 20:09:23

• 这次说对了。 -漫游68- ♀ (0 bytes) () 04/20/2010 postreply 20:12:28

• That's better than mine.:). -Morning3evening4- ♂ (0 bytes) () 04/20/2010 postreply 20:12:28

• 这的父母真火眼金睛，可喜可贺 -Lily3- ♀ (0 bytes) () 04/20/2010 postreply 20:12:38

• that is good,... -A-Momy- ♀ (0 bytes) () 04/20/2010 postreply 20:13:19

• 其它组第3未必比A组第2慢啊，为啥都被排除了呢？ -听听意见- ♀ (0 bytes) () 04/20/2010 postreply 20:15:32

• A1已占了一名。剩下两个。小三怎么能进？ -baydad- ♂ (0 bytes) () 04/20/2010 postreply 20:19:31

• A组的2、3名可以是很慢的。她这个答案不对 -听听意见- ♀ (0 bytes) () 04/20/2010 postreply 20:22:33

• agree. If C runs No.1 in the 3rd step, one more round -singsongsing- ♀ (155 bytes) () 04/20/2010 postreply 20:20:10

• 还是没明。A1占了一个位。剩下两个位。C组最多只能有一个：C1. -baydad- ♂ (15 bytes) () 04/20/2010 postreply 20:25:40

• 要多比几次才知道啦。 -听听意见- ♀ (0 bytes) () 04/20/2010 postreply 20:26:46

• sorry，你们是对的 -听听意见- ♀ (0 bytes) () 04/20/2010 postreply 21:05:15

• if C runs No.1 in the 3rd step, the No2 and No.3 in C group -singsongsing- ♀ (174 bytes) () 04/20/2010 postreply 20:33:12

• 顶 -WLP- ♀ (0 bytes) () 04/21/2010 postreply 08:28:58

• pick the last three and sale to others (banks) as top horses -##^^##- ♂ (20 bytes) () 04/20/2010 postreply 20:21:45

• 争取答案到底是多少？ -A-Momy- ♀ (0 bytes) () 04/20/2010 postreply 20:30:43

• I agree with 11. Lily's logic is wrong, for example -oops_yz- ♀ (69 bytes) () 04/20/2010 postreply 20:42:40

• 还没说到位，为什么选那几个做第七轮的比赛，得继续解释。能解题的不一定说得清楚，看来老师不是那么容易做的。 -婪妈- ♀ (0 bytes) () 04/20/2010 postreply 21:12:55

• 我想清楚了，可是不好解释 -yellowlemon- ♀ (1054 bytes) () 04/20/2010 postreply 21:34:01

• 解释得很清楚，使劲儿给你鼓掌~ -婪妈- ♀ (0 bytes) () 04/20/2010 postreply 21:39:53

• 脸红中，发现自己真不是聪明人，自己找不出正解，只能 -yellowlemon- ♀ (16 bytes) () 04/20/2010 postreply 21:44:58

• this is why only one could be a trader. no need for higher educa -janeice65- ♀ (0 bytes) () 04/20/2010 postreply 20:48:54

• not only, it's every -janeice65- ♀ (0 bytes) () 04/20/2010 postreply 20:52:04

• 这个是不对的 -yellowlemon- ♀ (470 bytes) () 04/20/2010 postreply 21:02:07

• 要我说5次就得了。哈哈。。一般赛马跑道都是10以上的。。 -eomom- ♀ (0 bytes) () 04/20/2010 postreply 23:00:49