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标题: Quick Thinking = smart [打印本页]

作者: Xiangdang 时间: 2009-1-29 07:23
标题: Quick Thinking = smart

If you answer the following question in 30 sec correstly, you are very smart.

Ten RED socks and ten BLUE socks are all mixed up in a dresser drawer. The twenty socks are exactly alike except for their color. The room is in pitch darkness and you want two matching socks. What is the smallest number of socks you must take out of the drawer in order to be certain that you have a pair that match?

作者: 1'' 时间: 2009-1-29 11:39
标题: 回复：Quick Thinking = smart

作者: husonghu 时间: 2009-1-29 11:59
标题: 回复：Quick Thinking = smart

作者: 2" 时间: 2009-1-29 12:24
标题: 回复：回复：Quick Thinking = smart

To have different colors.

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