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SEAMO 2027 - Paper B - SET 09 - Self-study Question 11

SEAMO · SEAMO 2027 - Paper B - SET 09 - Self-study

Question 11

Evaluate $1-2+3-4+5-6+7-\cdots-2018+2019$.
  1. 840
  2. 1010
  3. 1060
  4. 2000
  5. 2018