99
Or how about (9)9 ?
The number is 23.
It can have up to 5 digits.
98
The greatest number you can make from the digits 1, 8, 2, and 5 is 8521. By arranging the digits in descending order, you maximize the value of the number.
752
The number is 23.
It can have up to 5 digits.
98
9210
752
-2
2
Six.
descending order
The answer is 1. The smallest prime is 2 and the greatest prime (of however many digits) must be odd. The remainder of ANY odd number when divided by 2 must be 1.
7642
3333