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VTMO 2021 — Grade 6 — vtmo Question 8

VTMO · VTMO 2021 — Grade 6 — vtmo

Question 8

A consists of repunits of lengths $1$ through $36$. How many divide the $36$-digit repunit?
  1. $6$
  2. $8$
  3. $9$
  4. $10$
  5. $12$