the faces of the cubes you see on a 3x3x3 is 54 but if you take it apart there are 20 pieces/cubes and 1 core/center with 6 middle pieces/cubes attached to it. There are 8 corner pieces/cubes and 12...
The entire outer layer is painted so an 8x8x8 block inside isn't painted. Zero. All cubes are painted on at least one side and the 10x10x10 cube is painted on all sides.It's a 10x10x10 cube meaning...