Question

A cube of side 5 cm is painted on all its faces. If it is sliced into 1
cubic centimetre cubes, how many 1 cubic centimetre cubes will
have exactly one of their faces painted?

Answer 1

A cube of side 5cm is painted on all its side. If it is sliced into 1 cubic centimer cubes, how many 1 cubic centimeter cubes will have exactly one of their sides painted? Look at the image below: Little cubes with exactly one painted side will be those 3*3=9, which are in the center of each face.

Answer 2

Little cubes with exactly one painted side will be those 3*3=9, which are in the center of each face. (6 faces)*(9 per each) = 54.