Question

If each of the digits 2, 3, 4, 6, 7 and 8 is used exactly once to construct two three-digit numbers

mand n, what is the smallest possible positive value of the difference m-n?

Answer 1

Answer: 9

Explanation:

234 and 243 are the smallest possible sums that can form. After subtracting 234 from 243, your smallest possible positive difference will be 9.