Posted by noman on Thursday, March 7, 2013 at 6:26am.
A cube 4 cm on each side is painted blue and cut into 64 one cm cubes. How many onecm cubes are painted blue on exactly two faces?

MATH(Cube Problem)  Reiny, Thursday, March 7, 2013 at 10:36am
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)  Steve, Thursday, March 7, 2013 at 11:35am
Hmmm. I get 24, since there are 12 edges.
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