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A wooden cube is painted blue on all six faces and then cut along the lines shown into equal small cubes. How many small cubes have exactly two blue faces?

Competition practiceDice & Cubes
  • A8
  • B12
  • C6
  • D24

Step-by-Step Solution

Cubes with two painted faces sit on the edges but not at the corners. A cube has 12 edges, each with such cube: .
Answer: B) 12

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