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HKIMO 2026 THPT (Grades 10–12 shared) National Preliminary Set 05 Question 2

HKIMO · HKIMO 2026 THPT (Grades 10–12 shared) National Preliminary Set 05

Question 2

The sum of ten consecutive odd numbers is 300. Find the smallest number.
  1. 21
  2. 23
  3. 25
  4. 29