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HKIMO 2026 Grade 9 National Preliminary Set 04 Question 9

HKIMO · HKIMO 2026 Grade 9 National Preliminary Set 04

Question 9

Find $P=2\times 4+4\times 6+6\times 8+\cdots+24\times 26$.
  1. 2192
  2. 2912
  3. 2291
  4. 2921