Question

N is a number divisible by 19.If (N+1)(N+8) is divided by 19,the the reminder is

Answer 1

let N=19m
now
(N+1)(N+8)=(19m+1)(19m+8)
=19*19m^2 +19*8m+19m+8
=19*19m^2+19*9m+8
now when it is divided by 19 then reminder is 8