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1966 AMC 12 Question 24

AMC12 · 1966 AMC 12

Question 24

If $\log_MN=\log_NM,$ $M\ne N,$ $MN\gt0,$ and $M\ne1,$ $N\ne1,$ then $MN$ equals:
  1. $\dfrac12$
  2. $1$
  3. $2$
  4. $10$
  5. a number greater than $2$ and less than $10$