There are different numbers of combinations for groups of different sizes out of 9: 1 combination of 9 digits 9 combinations of 1 digit and of 8 digits 36 combinations of 2 digits and of 7 digits 84 combinations of 3 digits and of 6 digits 126 combinations of 4 digits and of 5 digits 255 combinations in all.
8877690
To combine the digits 1 through 9 into 7-digit combinations without repeating any digits, you can select any 7 digits from the 9 available. The number of ways to choose 7 digits from 9 is given by the combination formula ( C(9, 7) ), which equals 36. Each selection of 7 digits can then be arranged in ( 7! ) (factorial) ways. Therefore, the total number of 7-digit combinations is ( 36 \times 7! = 36 \times 5040 = 181440 ).
10^7 if the repetition of digits is allowed. 9*8*7*6*5*4*3 , if the repetition of digits is not allowed.
about 1,0000000000000
With repeating digits, there are 33 = 27 possible combinations.Without repeating any digits, there are 6 combinations:357375537573735753
There are different numbers of combinations for groups of different sizes out of 9: 1 combination of 9 digits 9 combinations of 1 digit and of 8 digits 36 combinations of 2 digits and of 7 digits 84 combinations of 3 digits and of 6 digits 126 combinations of 4 digits and of 5 digits 255 combinations in all.
8877690
To combine the digits 1 through 9 into 7-digit combinations without repeating any digits, you can select any 7 digits from the 9 available. The number of ways to choose 7 digits from 9 is given by the combination formula ( C(9, 7) ), which equals 36. Each selection of 7 digits can then be arranged in ( 7! ) (factorial) ways. Therefore, the total number of 7-digit combinations is ( 36 \times 7! = 36 \times 5040 = 181440 ).
There are 840 4-digit combinations without repeating any digit in the combinations.
10^7 if the repetition of digits is allowed. 9*8*7*6*5*4*3 , if the repetition of digits is not allowed.
about 1,0000000000000
There are 25 such numbers.
Oh, dude, you're hitting me with some math vibes here. So, if you have 6 digits to choose from to make a 4-digit combination, you can calculate that by using the formula for permutations: 6P4, which equals 360. So, like, you can make 360 different 4-digit combinations from those 6 digits. Math is wild, man.
987652431
975
98765