Question 1096048
<br>When the cubes are stacked in the first manner, forming a 10x10x10 cube, the cubes that do NOT have a face painted form an 8x8x8 cube.  So there are 512 small cubes with no face painted, which means there are 1000-512 = 488 small cubes with at least on face painted.<br>
488/1000= 48.8%<br>
When the cubes are stacked in the second manner, forming eight cubes each 5x5x5, the small cubes in each 5x5x5 cube with no face painted form a 3x3x3 cube.  So in each of the 8 cubes made up of 125 small cubes, there are 27 small cubes that have no face painted, which means there are 125-27 = 98 cubes with at least one face painted.<br>
98/125 = 78.4%