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HKIMO 2026 Grade 4 National Preliminary Set 04 Question 9

HKIMO · HKIMO 2026 Grade 4 National Preliminary Set 04

Question 9

Find the value of $50-49+48-47+\cdots+4-3+2-1$.
  1. 25
  2. 24
  3. 50
  4. 49