If no repetition, 6! ie 720; if repetition allowed, 66 ie 46656.
There are twelve possible solutions using the rule you stated.
Just the one. The order of the numbers does not matter in a combination so that 123456 is the same combination as 245136.
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-8
10,000 combinations.
216
Assuming no repeated digits, lowest first, 20; in any order 120; Allowing repeated digits: 216
Number of 7 digit combinations out of the 10 one-digit numbers = 120.
There are 840 4-digit combinations without repeating any digit in the combinations.
There are 5,040 combinations.
There are 210 4 digit combinations and 5040 different 4 digit codes.
120 combinations using each digit once per combination. There are 625 combinations if you can repeat the digits.
the answer is = first 2-digit number by using 48= 28,82 and in 3 digit is=282,228,822,822
There are twelve possible solutions using the rule you stated.
Just one. unless you count 123456 different from 132456 then there are 46656 * * * * * But you cannot count 123456 as different from 132456 since it is NOT a different combination. And the question was about combinations.
Just the one. The order of the numbers does not matter in a combination so that 123456 is the same combination as 245136.
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