Question

A Cube is coloured red on all its faces. It is then cut into 27 small cubes. How many cubes are having 3 faces coloured​

Answer 1

Answer:

e

Explanation:

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Answer 2

8

Explanation:

Only those vertices who have 3 sides exposed on the suface will.have 3 sides painted . These are located at vertices of cube. there are 8 vertices hence 8 cubes will have 3 sides coloured.

Actually question will be more interesting if the coloured side were to be 0,1 or 2. Direct formulas can be derived in these cases.