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 a……