At a secret family meeting, everyone shakes hands exactly once with every other person present. If there was a total of 28 handshakes, how big was the family?
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Sunday, October 12, 2008
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2 comments:
seven and yes, I pulled that right out of thin air....
Answer...8 persons. (8 x (8 - 1): 2 = 28) or (7 + 6 + 5 + 4 + 3 + 2 + 1 = 28).
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