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VTMO 2026 - Grade 4 - Semifinal - SET 4 - Self-study Question 6

VTMO · VTMO 2026 - Grade 4 - Semifinal - SET 4 - Self-study

Question 6

Calculate $10+9+8+\cdots+1+0+1+2+\cdots+9+10$.

Question illustration
  1. 110
  2. 55
  3. 45
  4. 90
  5. 100