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HKIMO 2026 Grade 5 National Preliminary Set 05 Question 10

HKIMO · HKIMO 2026 Grade 5 National Preliminary Set 05

Question 10

Find $\frac12+\frac14+\frac18+\cdots+\frac1{512}+\frac1{1024}$.
  1. $\frac{1015}{1024}$
  2. $\frac{511}{512}$
  3. $\frac{1023}{1024}$
  4. $\frac{127}{188}$