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VTMO 2016 — Grade 6 — semifinal Question 2

VTMO · VTMO 2016 — Grade 6 — semifinal

Question 2

Find the sum of the first $51$ positive odd integers minus the sum of the first $50$ positive even integers.
  1. $50$
  2. $51$
  3. $100$
  4. $102$
  5. $- 51$