Actually 1112 does work: Actually 1112 does work: 2111-1112 = 999 9990 - 0999 = ... 8532 - 2358 = 6174 5 iterations. Reply
Actually 1112 does work:
2111-1112 = 999
9990 - 0999 =
...
8532 - 2358 = 6174
5 iterations.