A large cube with an edge of 8 cm is made from the least possible number of centicubes. Although the object looks solid, it is hollow inside. How many centicubes are needed to make the object?
If it were SOLID it would be made of 8 x 8 x 8 cubes = 512
to make a hollow shell you have to remove a 6 x 6 x 6 core = 216
512 - 216 = 296 cubes remain