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A painted cube is cut into eight equal smaller cubes. Counting all eight small cubes together, how many of their faces are unpainted?

Competition practiceDice & Cubes
  • A48
  • B16
  • C24
  • D8

Step-by-Step Solution

The 8 small cubes have faces. Each small cube is a corner cube with 3 painted faces, so 3 unpainted: . (48 counts every face.)
Answer: C) 24

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