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HKIMO 2026 Grade 9 National Preliminary Set 05 Question 25

HKIMO · HKIMO 2026 Grade 9 National Preliminary Set 05

Question 25

How many positive integer solutions $(x, y)$ satisfy $1/x+1/y=1/6$?
  1. 6
  2. 12
  3. 9
  4. 2