Multiple choice

Let m is the greatest possible 3-digit number, in which no number is repeated, and n is the least positive 3-digit number that can be made using all of the digits of m. What is the value of m - n?

  1. 198

  2. 222

  3. 864

  4. 885

  5. 965
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A Correct answer
Explanation

p; that can be written using these three digits is 789. Their difference is 987 - 789 = 198.

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