A three centimetre cube has been painted red on all its sides. It is cut into one centimetre cubes. How many cubes will be there with only one side painted red?

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Solution

The correct option is A 6
It is clear that all cubes about the edges have either two or three sides painted. Only one central either two or three sides painted. Only one central cube in each face as shown in fig. Will have one face painted, since all it other faces are hidden inside the large cube.Hence option B is correct.

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