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March 30, 2017

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A cube has 8 vertices. For each pair of distinct vertices, we connect them up with a line segment. There are (8 2 )=28 such line segments. For each of these 28 line segments, we mark the midpoint. How many distinct points have been marked as the midpoints?

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    19

  • math - ,

    which of the numbers below is the sum of four consecutive whole numbers

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