An 8 x 8 x 8 hollow cube is constructed from 1 x 1 x 1 cubes so that its six walls are 1 cube thick. The number of 1 x 1 x 1 cubes needed to make the hollow cube is

Question

An 8 x 8 x 8 hollow cube is constructed from 1 x 1 x 1 cubes so that its six walls are 1 cube thick. The number of 1 x 1 x 1 cubes needed to make the hollow cube is
A.169
B.296
C.298
D.384

Steve · Answer

the inside space is a 6x6x6 cube. So, just subtract it: 8^3-6^3 = ?