Assuming your problem means 3 hexadecimal digits, we have the largest 3 digit number being "fff". Since f = 16 (base 10), we have that fff(base 16) = 16*16*16(base 10) = 4096 If it's a 3 digit decimal number, then 999, since hex can represent ANY number.
997 is the biggest 3 digit Prime number.
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
The biggest 4 digit number that can be made from using the digits of 850236, using a digit at most once, is 8653.
1
The largest 2-digit prime number is 97.
99
9,999
9
99