Cube and Cuboid

Directions to SolveThere are 128 cubes with me which are coloured according to two schemes viz.

64 cubes each having two red adjacent faces and one yellow and other blue on their opposite faces while green on the rest.
64 cubes each having two adjacent blue faces and one red and other green on their opposite faces, while red on the rest. They are then mixed up.

How many cubes have at least two coloured red faces each ?

A 0

B 32

C 64

D 128

ANS:D - 128

Explanation: 64 and 64 cubes of both types of cubes are such who have at least two coloured faces red each. Therefore, total number of the required cubes is 128.

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