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HKIMO 2026 Grade 8 National Preliminary Set 03 Question 7

HKIMO · HKIMO 2026 Grade 8 National Preliminary Set 03

Question 7

Given $a+b=16$ and $a^2+b^2=160$, find $ab$.
  1. 96
  2. -48
  3. -96
  4. 48