Posted by **Matt** on Saturday, October 27, 2007 at 8:10pm.

Form two four-digit numbers from the digits 2, 3, 4, 5, 6, 7, 8,

and 9, using each digit exactly once, so that the absolute value of

the difference of the two numbers is as small as possible.

I don't know where to start, any help would be greatly apprecitated.

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