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VTMO 2015 — Grade 6 — semifinal Question 10

VTMO · VTMO 2015 — Grade 6 — semifinal

Question 10

Thanh has $1024$ coins, and removes half the remaining coins each time. How many removals leave one?
  1. $10$
  2. $11$
  3. $12$
  4. $512$
  5. $1023$