A cube is painted entirely red on the outside, and then cut into 27 smaller, identical cubes. How many of the smaller cubes have paint on exactly two of their faces?
12
Cubes with paint on exactly two faces are located on the edges of the original large cube, excluding the corner pieces. Since a cube has 12 edges and 1 cube per edge (excluding corners), there are 12 such cubes.
About this riddle
Logic riddles give you a few facts and ask what must be true. List what you know, cross out what cannot be, and see what is left.
Difficulty: Medium. More like this: Logic riddles with answers or try Einstein's Logic Grid for a different kind of puzzle.
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