There are 210 4 digit combinations and 5040 different 4 digit codes.
There are 10000 because there is 0001 to 9999 and then there is 0000.
There are seven possible digits for the first digit and 6 digits for the second (minus one digit for the digit used as the first digit) and 5 options for the last digit (minus one again for the second digit) and then you just multiply them all together to get a total possible combination of 210 numbers that are possible.
There are 30,240 different 5-digit numbers. Math: 10*9*8*7*6 1st digit has 10 possible choices (0-9) 2nd digit has 9 possible choices (one of the digits was used in the 1st digit) 3rd digit has 8 possible choices 4th digit has 7 possible choices 5th digit has 6 possible choices
105 = 100000
There are 210 4 digit combinations and 5040 different 4 digit codes.
There is only one possible combination as a combination is the same no matter what the order is. There are 120 permutations, which is where the order does matter.
Too many to list here-see below.
if its not alphanumeric, 999999 variations
There are 10000 because there is 0001 to 9999 and then there is 0000.
6,720 combinations.
10x9x9x9
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.
I would have to say 10,000 possible combinations. (0000, 0001, 0002 through 9998, 9999)
It depends on how many digits in an area code. North America (USA, Canada, etc.) uses a uniform system of 3-digit area codes, but many other countries do not. Assuming a 3-digit area code and no other restrictions other than "first digit not zero," that leaves 900 possible area codes.
104 or 10000
There are seven possible digits for the first digit and 6 digits for the second (minus one digit for the digit used as the first digit) and 5 options for the last digit (minus one again for the second digit) and then you just multiply them all together to get a total possible combination of 210 numbers that are possible.