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HKIMO 2026 Grade 7 National Preliminary Set 04 Question 7

HKIMO · HKIMO 2026 Grade 7 National Preliminary Set 04

Question 7

Find $A=\sqrt{20+\sqrt{20+\sqrt{20+\cdots}}}$.
  1. 6
  2. 5
  3. 20
  4. 4