It really depends on what operations are allowed, and whether you are allowed to repeat operations. If you find one way, you can extend that to infinitely many ways. Since the factorial of 1 is 1, you can add as many exclamation marks as you want.
There are 840 4-digit combinations without repeating any digit in the combinations.
8 of them.
ccsndf
-5674
# 230 # 203 # 320 # 302
24
Six of them.
There are twelve possible solutions using the rule you stated.
There are 840 4-digit combinations without repeating any digit in the combinations.
5040
4p3*3p1 equal to 72 ways
24 of them.
648
8 of them.
18, if leading 0s are disallowed.
55----------------------------------------------------------------------------------------------From Rafaelrz.You can make, 5! = 120, five digit numbers using 1,2,3,4 and 6.
your a very unegucated chill i hope you burn in hell