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SEAMO 2021 — Paper A — Grade 1–2 Question 1

SEAMO · SEAMO 2021 — Paper A — Grade 1–2

Question 1

Find $11+12+13+\cdots+17+18+19$.
  1. $120$
  2. $125$
  3. $130$
  4. $135$
  5. $140$