Find the following values 18 mod 7 88 mod 13 239 mod 17Solut

Find the following values: 18 mod 7 -88 mod 13 239 mod 17

Solution

Answer :

a mod b gives the remainder when b divides a .

1) 18 mod 7 =remainder of ( 18/7) = 4

2) - 88 mod 13

if we add - 3 to - 88 then we get - 91 which will be divisible by 13.

So that -88 mod 13 = - 3

3) 239 mod 17 = ramainder of ( 239 / 17 ) = 1