eight
24
You can select 9 numbers for the first digit, 8 numbers for the second digit, and 7numbers for the third digit; so 504 (e.g. 9*8*7) different three digit numbers can be written using the digits 1 through 9.
None.
8 of them.
24 different numbers.
9
-8
27
If you want 4-digit numbers, there are 24 of them.
321 312 213 231 123 132 6 3 digit numbers.
3! = 6.
55----------------------------------------------------------------------------------------------From Rafaelrz.You can make, 5! = 120, five digit numbers using 1,2,3,4 and 6.