The greatest remainder when dividing by any number is one less than the number itself.
The greatest remainder when dividing by 18 is therefore 17.
EXAMPLE : 35 ÷ 18 = 1 and remainder 17.
17
9
47
4
If you're dividing a whole number by 2, then the greatest possible remainder is 1.
4
17
9
47
4
1000
The greatest possible remainder is 11.
If you're dividing a whole number by 2, then the greatest possible remainder is 1.
4
2
11
7.
18