Verbal Reasoning - Cube and Cuboid - Discussion

The following questions are based on the information given below:

All the opposite faces of a big cube are coloured with red, black and green colours. After that is cut into 64 small equal cubes.


How many small cubes are there whose no faces are coloured ?

[A]. 0
[B]. 4
[C]. 8
[D]. 16

Answer: Option C


Number of small cubes having no face coloured = (x - 2)3

= (4 - 2)3

= 8

Chandan said: (Apr 9, 2015)  
Please explain it how we write (x-2)?

Sandesh Jain said: (Jun 18, 2015)  
Consider volume of small cube. So each side is 2 cm (subtract 1 box on each side).

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