GMAT Challenge Question

This week’s GMAT challenge from is a problem solving question.

M and N are two different three-digit integers. The sum of the tens digit of M and N is 16. What is the greatest possible sum of M and N?

  1. 1968
  2. 1977
  3. 1978
  4. 1979
  5. 1998

Have a go at answering this and then review your answer.

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