2005-8-18 8:15:00
转载:Goldman Sachs 面试题
每题最多想五分钟，从易到难。 这是Goldman Sachs 面试中被问到的 brain teasers.1. At a train station: there is a south-bound train every 10 minutes; there is a north-bound train every 10 minutes. Every day you arrive at the train station at some random time, and you board the first train that arrives, whatever that is. After a year you found that 90% of time you get on the south-bound train. Why?
2. You are by yourself on an island, waiting to be rescued. Help will arrive on the 10th day (today is day 0). You have two types of pills: A and B, 10 tablets each. In order to survive to the next day, you need to eat one A and one B. However, you incidentally mixed the pills, and you cannot tell which is A, which is B. What do you do now?
3. There are 25 horses, each runs at different speed. You can race a maximum of 5 horses each time. What is the minimum number of races needed to determine the three fastest horses? (You need to determine which is No.1, which is No.2 and which is No.3).
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发布者 admin
2005-8-21 2:43:00
想了很久，找不到答案。
发布者 admin
2005-8-22 7:56:00
1.The south-bound train stop in the station for 9 minutes while north-bound train stop for 1minute.
2.Stamp 20 pills to powder, mix-up, and eat 10% per day.
3.With a timer, it's 5.
Don't be so complex. :)
发布者 admin
2005-8-23 4:50:00
1.The south-bound train stop in the station for 9 minutes while north-bound train stop for 1minute.
2.Stamp 20 pills to powder, mix-up, and eat 10% per day.
3.With a timer, it's 5.
Don't be so complex. :)
1. 不错的想法。但是我想出题的原意是两个方向的车停的时间都是正常的－－乘客上车了就走。
2. 正确。
3. 我想Goldman不是让我们做”脑筋急转弯“这么简单。否则，这道题应该是抢答题。＝)
发布者 admin
2005-8-23 6:23:00
第一道想不出是什么，第二道和第三到想到了，但感觉太简单了，原来答案就是这样。太没信心了。
hehe。第一题应该是两辆车相继一分钟到车站，例如，北行的车1：00到，南行的1：01到，他们中间的时间差9分钟。第三题的答案是
67 次。很简单吧。发布者 admin
2005-8-24 0:49:00
第一道想不出是什么，第二道和第三到想到了，但感觉太简单了，原来答案就是这样。太没信心了。
hehe。第一题应该是两辆车相继一分钟到车站，例如，北行的车1：00到，南行的1：01到，他们中间的时间差9分钟。第三题的答案是6次。很简单吧。
oops，我之前写错了，笔误。谢谢你指出。
发布者 admin
2005-10-1 0:42:00