Mensurationhard · Past Paper
A cube of side 4 cm is painted on all sides and then cut into unit cubes (1 cm side). How many unit cubes have no paint on them?
A8
B27
C64
D1
✓ Correct Answer: A — 8
The inner cubes with no paint form a smaller cube of side (n-2). Here (4-2)³ = 2³ = 8.
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