Mixed up Lego Bricks – Part II

12 Red lego bricks, 16 blue lego bricks  and 18 yellow lego bricks are all mixed up in a drawer.  All the 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?

For solution, click below

Continue reading “Mixed up Lego Bricks – Part II”

Mixed Up Lego Bricks – Part 1

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?

For solution, click below

Continue reading “Mixed Up Lego Bricks – Part 1”