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To calculate the number of small cubes that can fit inside the largest cube, we need to find the volume of each cube. The formula for volume is side length cubed. So, the volume of the small cube is 1mm x 1mm x 1mm = 1mm³, and the volume of the largest cube is 4mm x 4mm x 4mm = 64mm³. Therefore, it would take 64 small cubes to fill the largest cube.
Answer = 8. The only small cubes with paint on three faces are those that occupied the corners of the original cube.
8 if you want it to be 2X2 of cubes, 27 if you want it to be 3X3.