There are 15180 combinations.
Only one: 2468. The order of the digits in a combination does not make a difference.
Just one. In a combination, the order of the digits does not matter.
There are 210 4 digit combinations and 5040 different 4 digit codes.
There are 126 different 5 digit combinations. Note that the combination 12345 is the same as the combination 45312.
With 123 digits you can make 123 one-digit numbers.
There are infinite combinations that can make 3879
6,720 combinations.
10x9x9x9
Using the eight digits, 1 - 8 ,-- There are 40,320 eight-digit permutations.-- There is 1 eight-digit combination.
There are 1140 5 digit combinations from 1 to 20. 20 combination 3 computes that.
There is only one combination. There are many permutations, though.