Question 8
Select nine different digits from 0, 1, 2, 3, 4, 5, 6, 7, 8 and 9, and then use these digits to create three positive three-digit numbers, namely A, B and C, where $A>B>C$. What is the smallest possible sum of the pairwise positive differences (subtracting the smaller number from the larger number, that is $A-B$, $A-C$ and $B-C$) between these three three-digit numbers?