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This block, 5 cubes long, 4 cubes deep and 3 cubes high, is painted all over. How many of its small cubes have paint on exactly one face?

Competition practiceDice & Cubes
  • A30
  • B18
  • C22
  • D26

Step-by-Step Solution

One painted face means the inner part of a face. Top and bottom: each, 12. Front and back: each, 6. The two ends: each, 4. Total .
Answer: C) 22

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