There would be 9*9*9*9 or 6561 combinations.
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If you have a 4 digit password there are 9999 combinations and if it's a 5 digit it's 99999 etc.
There are 5*4*3*2 = 120 such numbers.
There are 125970 combinations and I am not stupid enough to try and list them!
There are a huge number of combinations of 5 numbers when using the numbers 0 through 10. There are 10 to the 5th power combinations of these numbers.
About 13million,
If the numbers can be repeated and the numbers are 0-9 then there are 1000 different combinations.