Assuming each "digit" actually has 10 different states, there are one million combinations possible in a six-digit combination lock. However, many combination lock designs actually have fewer than 10 different states per "digit", resulting in far fewer actual combinations on such locks.
10000
6,720 combinations.
125
If order doesn't matter, 15 combinations and if order does matter, 360 combinations are possible.
10x9x9x9
10000
6,720 combinations.
125
I would have to say 10,000 possible combinations. (0000, 0001, 0002 through 9998, 9999)
There are millions of possible combinations.
If order doesn't matter, 15 combinations and if order does matter, 360 combinations are possible.
2^n possible combinations
There are 2^5 = 32 different combinations of the five traits possible.
There are 167960 combinations.
Since a number can have infinitely many digits, there are infinitely many possible combinations.
10x9x9x9
10000