1234 1243 1324 1342 1423 1432 2134 2143 2314 2341 2413 2431 3124 3142 3214 3241 3412 3421 4123 4132 4213 4231 4312 4321
If you can repeat digits, then there are 256 numbers
Without repetition, there are 24
There are 192.
89,999 different numbers i guess
99999
With 123 digits you can make 123 one-digit numbers.
24
There are 192.
89,999 different numbers i guess
99999
9
With 123 digits you can make 123 one-digit numbers.
600 of them.600 of them.600 of them.600 of them.
24
3*3*2*1 = 18 of them.
Yuo can make only one combination of 30 digits using 30 digits.
There are 60480 numbers.
Six, if you don't repeat any digits.
Using the combination C(4,3) I got the answer 24. Its either a combination or a permutation.