if you are using just 3 it would be 99^9, which is 9 to the ninth power to the ninth power. which equals: 1.9662705047555291361807590852691e+77.* i used Calculator :D
*if you don't count a math problem as correct, use 999
"in base 10 its 999"
999
8,754,321
8643
531
9531
The biggest 4 digit number that can be made from using the digits of 850236, using a digit at most once, is 8653.
-4790281
The greatest 9-digit number using three different digits is 999888777, formed by using the digits 9, 8, and 7 in descending order. The smallest 9-digit number using three different digits is 100000000, created with the digits 1, 0, and 0. This arrangement ensures that the number starts with 1, followed by the zeros to maintain the smallest value.
3201
9876543210
9+3-1
972.