The biggest 4 digit number that can be made from using the digits of 850236, using a digit at most once, is 8653.
997 is the biggest 3 digit Prime number.
9909
7532
998 is the biggest 3-digit even number
9,999
The biggest 4 digit number that can be made from using the digits of 850236, using a digit at most once, is 8653.
9999
9,999
997 is the biggest 3 digit Prime number.
9909
7532
997 is the biggest 3 digit prime number.
998 is the biggest 3-digit even number
The biggest nine digit number would consist fully of '9's: 999,999,999
5
9999