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Q.

1. All the faces of cubes are painted with red colour.
2. The cubes are cut into 64 equal small cubes
How many small cubes have only one face coloured?

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a

8

b

16

c

24

d

4

answer is D.

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Detailed Solution

Number of small cubes having only one face coloured = (x - 2)2 $\times$ No. of faces = (4 - 2)2 $\times$ 6 = 24

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1. All the faces of cubes are painted with red colour. 2. The cubes are cut into 64 equal small cubesHow many small cubes have only one face coloured?