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SEAMO 2026 Paper D SET 2 – Self-practice Question 1

SEAMO · SEAMO 2026 Paper D SET 2 – Self-practice

Question 1

Find the last 2 digits in the sum $1+2+3+4+\cdots+2017+2018$.
  1. 75
  2. 71
  3. 56
  4. 63
  5. None of the above