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Problem of the Week |
Due to the upcoming Thanksgiving holiday, this problem will be posted for two weeks. Happy gobbling.
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PROBLEM 205 The following problem was suggested by Dr. Michael Lang. Take 15 pennies and put them in a triangle as shown on the left. Must there always be three pennies, all three heads or all three tails, whose centers form an equilateral triangle? Please explain your answers fully. You are visitor number 3347
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