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MATH(Cube Problem)

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A cube 4 cm on each side is painted blue and cut into 64 one cm cubes. How many one-cm cubes are painted blue on exactly two faces?

  • MATH(Cube Problem) -

    The cubes with two sides painted must lie along the edges, except those at the corner, (they would have 3 sides painted
    On each side I see 2 blocks that would be painted on 2 sides
    so the number of blocks = 6x2 or 12

  • MATH(Cube Problem) -

    Hmmm. I get 24, since there are 12 edges.

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