Talking about only whole numbers, there are
(9 x 9 x 8 x 7 x 6) = 27,216 possibilities.
24,681 is an example.
987654
256
98765432
9876543210, without using any mathemeatical operations.
9876543
987654
86420
9876543210
256
873 is.
98765432
9876543210, without using any mathemeatical operations.
It is 98765.
9876543
123,456,789
9876543
id say, 0123456789. but depends how many digits you can have