If seven people meet at a party, and each person shakes the hand of everyone else exactly once, how many handshakes are there in all?
Our homeschool co-op held an end-of-semester assembly. Each class was supposed to demonstrate something they had learned.
I threatened to hand out a ten question pop quiz on integer arithmetic, but instead my pre-algebra students presented this skit.
Cast
1-3 narrators (or more, if you have a large group)
7 friends (non-speaking parts, adjust to fit your group)
Props
Each friend will need a sheet of paper with a number written on it big and bold enough to be read by the audience. The numbers needed are 0, 1, 2, 3, … up to one less than the number of friends. Each friend keeps his paper in a pocket until needed.

