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.

4. 

How many small cubes are there whose only one face is coloured ?

[A]. 32
[B]. 8
[C]. 16
[D]. 24

Answer: Option D

Explanation:

Number of small cubes having only one face coloured = 4 from each face

= 4 x 6

= 24


Sribash Biswas said: (Sep 19, 2011)  
If all the side is colored thenn the formula is

For only one side color = 6* (segment line -2) ^2.

Pranay said: (Jan 7, 2015)  
Other way of solving.

We have 3 formula for for same problem like one or 2 or 3 faces:

No side colored = (n-2)^3.

One side colored = 6*(n-2)^2.

2 side colored = 12*(n-2).

3 sided colored for cube always 8.

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