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HKIMO 2026 Grade 9 National Preliminary Set 01 Question 8

HKIMO · HKIMO 2026 Grade 9 National Preliminary Set 01

Question 8

Simplify $\sqrt{23+4\sqrt{15}}$.
  1. $\sqrt3+2\sqrt5$
  2. $\sqrt3-2\sqrt5$
  3. $\sqrt5+2\sqrt3$
  4. $\sqrt5-2\sqrt3$