Posted by Matt on Saturday, October 27, 2007 at 8:10pm.
Form two fourdigit 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.

Calculus Bonus  Reiny, Saturday, October 27, 2007 at 8:32pm
How about 2345 and 1986 ?