.
.
. .
.
Subj:.....Maximum Product (S600b)
          From: Puzzles And Brain Teasers on 7/10/2008 
Source: http://www.apuzzlezone.com/adailypuzzle/07-10-08.html
 

P and Q are integers that between them contain each
of the digits from 0 to 9 once and only once.  What
is the maximum value of P x Q?
 
 
 
 

                  THE SOLUTION

               96,420 x 87,531 = 8,439,739,020
.
.
.

.