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Blindly Picking Socks

You have 12 black socks and 12 white socks mixed up in a drawer. You’re up very early and it’s too dark to tell them apart. What’s the smallest number of socks you need to take out (blindly) to be sure of having a matching pair?

Sock drawer

Three socks. If the first sock is black, the second one could be black, in which case you have a matching pair. If the second sock is white, the third sock will be either black and match the first sock, or white and match the second sock.


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4 Comments on "Blindly Picking Socks"


Ivy says
August 13, 2014 @ 09:19

Only three. You will either get three of the same color, two black and one white or vice versa.


Maria says
February 19, 2015 @ 09:35

To be 100% sure and to be able to bet ur life on it u need to take out 13 socks!


Maria says
February 19, 2015 @ 09:36

Sorry, misread! I thought it asked for a black pair, not a matching pair. Yeah, it is 3 then!


GraceyCakes says
November 22, 2016 @ 18:47

13, because if you take out 3 black socks… OH NVM IM STOOPID XD


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