A 5x5x5 cube is formed by assembling 125 unit cubes. Nine unit squares are painted on each of the six faces of the cube according to the pattern shown. How many of the 125 unit cubes have no paint on them?
I saw Geno answer this one somewhere else today!
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this is the answer!
http://web2.0calc.com/questions/1-nbsp-a-cube-is-painted-red-on-all-six-sides-then-cut-into-125-smaller-congruent-cubes-how-many-of-the-small-cubes-are-painted-red-on-ex#r2
