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AMC8 2027 - Self-practice Set 1 Question 22

AMC8 · AMC8 2027 - Self-practice Set 1

Question 22

Evaluate the following expression.
$$(5+10+15+\ldots+2020)-(4+8+12+\ldots+2020).$$
  1. 102010
  2. 409050
  3. -102010
  4. -409050
  5. 2020