8
Chat with our AI personalities
7,777,777
* * * * *
That is not correct. The correct answer is (27 - 1) which is 127
1000
You can make 5 combinations of 1 number, 10 combinations of 2 numbers, 10 combinations of 3 numbers, 5 combinations of 4 numbers, and 1 combinations of 5 number. 31 in all.
64
Number of 7 digit combinations out of the 10 one-digit numbers = 120.
You could make 10*10*10*26*26*26 combinations, or 17576000 combinations.