144 = 72 + 72, and no factor crosses between the figures
Write a distinct positive integer in each of the eight circles, so that the four in each figure sum to 72. Any two of the eight circles are joined by a line exactly when their numb...
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Write a distinct positive integer in each of the eight circles, so that the four in each figure sum to 72. Any two of the eight circles are joined by a line exactly when their numb...
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