6 numbers:246 264 426 462 624 642
ten factorial = 10! = 3,628,800
24
543210
27 three digit numbers from the digits 3, 5, 7 including repetitions.
2,401
There are 60480 numbers.
125
ten factorial = 10! = 3,628,800
There are 900 of them.
5040 numbers can be made.
27 if the digits can be repeated. 6 if not.
27
24 different numbers.
6, if you don't repeat any numbers.
24 of them.
60
48 of them if digits may not be repeated. 100 if they can.