Sunday, February 28, 2010

POW #13

Handshakes
There are 26 students in your class (including yourself). Every student shakes hands with exactly one-half of the students in the room. What is the minimum number of handshakes that occurred?

Prove it with a picture, table, or equation/rule (or all three!)

Hint: First try this problem with smaller numbers to find a pattern and then apply your pattern to the above situation.

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