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AIMO 2021 Primary 2 — Preliminary (Open Trial 1) Question 9

AIMO · AIMO 2021 Primary 2 — Preliminary (Open Trial 1)

Question 9

Find the value of 18 + 27 – 36 – 45 – 54 – 63 + 72 + 81.
  1. 0
  2. 99
  3. 198
  4. 396