MATH(Cube Problem)
posted by noman .
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?

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