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SEAMO 2027 - Paper D - SET 05 - Self-study Question 15

SEAMO · SEAMO 2027 - Paper D - SET 05 - Self-study

Question 15

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