Question

The six faces of a cube are painted in a manner that no two adjacent faces have the same colour. The three colours used in painting are red, blue and green. The cube is then cut into 36 smaller cubes in such a manner that 32 cubes are of one size and the rest of a bigger size and each of the bigger cubes has no red side. Answer the following question based on the given information.

How many cubes in all have a red side?

• A. 16
• B. 32
• C. 8
• D. 20

Answer 1

The correct option is B 32

Since the bigger cube are not painted red, so only top and bottom surfaces of the big cube would be painted with red colour.

Hence the no. of faces all have red colour=$16+16=32$.