We invite you to test your GMAT knowledge for a chance to win! Each week, we will post a new Challenge Problem for you to attempt. If you submit the correct answer, you will be entered into that week’s drawing for a free Manhattan GMAT Prep item. Tell your friends to get out their scrap paper and start solving!
Here is this week’s problem:

If n is a positive integer greater than 1, what is the smallest positive difference between two different factors of n?

(1)  is a positive integer.

(2) n is a multiple of both 11 and 9.

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