Problem:
A drawer contains red, green, blue and white socks with at least of each color. What is the minimum number of socks that must be pulled from the drawer to guarantee a matching pair?
Answer Choices:
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Solution:
If a set of socks does not contain a pair, there must be one of each color. The th sock must match one of the others and guarantee a matching pair.
The problems on this page are the property of the MAA's American Mathematics Competitions