1 .	A solid cube of 4 inches has been painted red, green and black on pair of opposite faces. It has been cut into one inch cubes. How many cubes have no face painted ?
[ A ]    0 [ B ]    4 [ C ]    8 [ D ]    16
Answer : Option C Explanation : Inner cube = $(x+ 2)^3$ (Here x= 4) = $(4 – 2)^3$ = $2^3$ = 8
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