How many cubes do not have any red color?
If you cut out 2 feet from each side (one foot from each end), the remaining cubes will have 2 x 2 x2 = 8. Only 8 cubes have no color. For each side, the middle 4 cubes have one face with color. There are 6 sides for a cube. Therefore there are 4 x 6 = 24 cubes with one red face.
Only corner cube will have 3 red face. Since there are 8 corners, 8 cubes have 3 read face.
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