If positive integers m and n satisfy m+n<10, how many distinct values can mn assume?

If positive integers m and n satisfy m+n<10, how many distinct values can mn assume?

  1. a) 16
  2. b) 17
  3. c) 18
  4. d) 20

From the BB Assistant Director (General) July 2026 – Preliminary exam, question 55 of 100.

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