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1968 AMC 12 Question 33

AMC12 · 1968 AMC 12

Question 33

A number $N$ has three digits when expressed in base $7.$ When $N$ is expressed in base $9$ the digits are reversed. Then the middle digit is:
  1. $0$
  2. $1$
  3. $3$
  4. $4$
  5. $5$