Question

2.) In the equation below, a, b, r are integers, O≤r<b, a is a multiple of 3 and b=9.
a=bq+r

«Which of the following forms represent a?

»Option 1: Only 9q and 9q+3, as only these forms when divided by 3 gives r=0.

»Option 2: Only 9q+1 and 9q+4, as only these forms when divided by 3 gives r=1.

»Option 3: Only 9q,9q+3, and 9q+6. as only these forms when divided by 3 grves r=0.

»Option 4: Only 9q+1, 9q+4, and 9q+7, as only these forms when divided by 3 gives r=1.​

Answer 1

Answer:

option d) I have solved this question previous year