A block of cheese measuring 5 inches by 2 inches by 3 inches is coated in a very thin layer of wax. The cheese is sliced into 240 cubes with half-inch edges. How many cubes will not have any wax on them?

We have 10 * 4 * 6 = 240 cubes

Number of cubes with no wax on them =

(10 - 2) ( 4 - 2) ( 6 - 2) =

8 * 2 * 4 =

64

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