1, 12, 23, 34, 45, 56, 67, 78, 89,101, 112, 123, 134, 145, 156, 167, 178, 189 and so on
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71
It is 58.
Meaningless question.
56. Tens digit is greater than 4 and less than 6 so it can only be 5, so the number is 5X. It is one less than the number whose digits sum to 12, so its digits sum to 12-1 = 11 → 5 + X = 11 → X = 11 - 5 = 6 → the number is 56.
Greater than zero: 160000 If negative numbers are considered (less), then -969999.