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AMO 2027 Grades 9-11 SET 1 - Self-study Question 3

AMO · AMO 2027 Grades 9-11 SET 1 - Self-study

Question 3

Find the value of the following: $$101-102+103-104+105-106+\cdots+199-200+201.$$

Question illustration

Choose one option.
  1. 201
  2. 50
  3. -50
  4. -201
  5. 151