8 red Lego Bricks and 4 blue Lego Bricks are all mixed up in a drawer. The 12 bricks are completely alike except for their colors. The room is in total darkness, and you want two matching bricks.
You start pulling out bricks from the drawer, one at a time. What is the fewest number of bricks that you would need to take out of the drawer in order to be certain that you have a pair that match?
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Certainly taking out two bricks out of the drawer is not enough to guarantee a pair, since you might end up getting one red and one blue brick. But, the third brick drawn, whether red or blue, is guaranteed to create a match.