6, if you don't repeat any numbers.
There are 60480 numbers.
125
ten factorial = 10! = 3,628,800
5040 numbers can be made.
24 different numbers.
27
24 of them.
60
48 of them if digits may not be repeated. 100 if they can.
More than one
1
To form a five-digit number using the digits 1, 2, 3, 4, and 5, each digit must be used exactly once. Since there are 5 unique digits, the total number of different five-digit numbers that can be formed is given by the factorial of the number of digits, which is 5! = 120. Therefore, 120 different five-digit numbers can be formed using the digits 12345.