2023 WSMO Speed Round Problems/Problem 3

Problem

There are 6 pairs of socks for each color of the rainbow (red, orange, yellow, green, blue, indigo, violet) in a sock drawer. How many socks must be drawn from the drawer to guarantee that a pair of red socks have been drawn?

Solution

There are non-red socks. Thus, a pair of red socks is guaranteed after socks have been drawn.

~pinkpig