when the positive integer x is divided by 9, the remainder which of following must be true?

when the positive integer x is divided by 9, the remainder which of following must be true?

A x is odd

B x is even

C x +1 is divisible by 3

D x -1 is divisible by 2

Solution

Correct Answer: Option C

x=9p+5

x+1=9p+6 which is divisible by 3