The Handshake Problem!
This classic problem continues to stump people today. There's more than one way to figure this problem out, however, as the number of people increase, it's much more helpful to know and understand the algorithm.
The Question:
You are in a roomful of 35 people. Everyone is asked to shake hands with everyone. How many handshakes will there be? How can you figure this out? What strategies will you use?

