There's no such thing as one consecutive digit. There has to be at least two of them.
When you count, consecutive digits are numbers that you name in a row, with nothing else between them.
Examples:
34 and 35 are consecutive. There's no counting number between them.
97 and 98 are consecutive. There's no counting number between them.
62 and 64 are not consecutive, because 63 comes between them.
Chat with our AI personalities
terminal-digit and Middle- digit Filing Systems
No.
There are 200 positive four digit integers that have 1 as their first digit and 2 or 5 as their last digit. There are 9000 positive four digit numbers, 1000 through 9999. 1000 of them have 1 as the first digit, 1000 through 1999. 200 of them have 2 or 5 as their last digit, 1002, 1005, 1012, 1015, ... 1992, and 1995.
135
The largest 10-digit number with no digit repeated is 9876543210 !