The Sock Problem #2

Silas reaches into his sock drawer in the dark, and he wants to make sure that he grabs a matching pair.  The drawer has 3 identical blue socks, 2 orange, 1 red, 1 purple, and 1 green sock. 

Question:  How many socks must Silas grab to ensure that he has at least one matching pair? 

For the solution, click "read more" below:

Solution: 6

Silas could grab 5 socks without getting a matching pair:  1 blue, 1 orange, 1 red, 1 purple, 1 green.  If he grabs the 6th sock, it is guaranteed to match one of the others.