Home » Math Riddles » I have 10 red socks and 10 blue socks in a drawer. How many socks must I take out to ensure that I have at leas...

I have 10 red socks and 10 blue socks in a drawer. How many socks must I take out to ensure that I have at least one matching pair? One how many to ensure I have at least a pair of red and a pair of blue?
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