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HKIMO 2026 Grade 8 National Preliminary Set 04 Question 1

HKIMO · HKIMO 2026 Grade 8 National Preliminary Set 04

Question 1

There are some 1-dollar, 2-dollar and 5-dollar coins. The number of 1-dollar coins is twelve times the number of 2-dollar coins. Their total value is 100 dollars. Find the number of 5-dollar coins.

Editorial reading of “some”: at least one coin of each named denomination is present.
  1. 6
  2. 20
  3. 14
  4. 8