A) 8
B) 16
C) 18
D) 27
E) None of these
Correct Answer: D
Solution :
Explanation Option [d] is correct. There will be 5 cubes for the given large cube as length, width and depth. So in the middle layers there will be \[3 \times 3 = 9\] cubes/layer. So in all, there will be \[9 \times 3 = 27\]cubes unpainted on all faces.
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