There are 20 different socks, of two types, in a completely dark room. What is the minimum number of socks you should grab to ensure you have a matching pair?
The point of problems is to think about them. Seriously, take the time if you want to learn something. If you have no insight into a problem, then start playing around and do trial and error. Do you have a match with one sock - obviously not. Must you have a match with two socks? Figure it out!
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