The six faces of a three-inch wooden cube are each painted red. The cube is then cut into one-inch cubes along the lines shown in the diagram. How many of the one-inch cubes have red paint on at least one face?
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The six faces of a three-inch wooden cube are each painted red.
The cube is then cut into one-inch cubes along the lines shown in the diagram.
How many of the one-inch cubes have red paint on at least one face?
All of them except the one buried in the very center. ==> 26
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