Shared on Reddit, the post challenges people to find the total of hidden sides of three ... and there are three dice, so 7 * 3 * 3 = 63 for the total number on all faces, minus the visible faces ...
No faces overlap. So only net d or net e could be dice. net d folds up so that all these sides are opposite. net e does not fold up so that all these sides are opposite. Faces with two and three ...