When the positive integer y is divided by 9, the remainder is 5. What is the remainder when 3y is divided by 9?  Choose the correct answer.
A) 0  B) 1  C) 3  D) 4  E) 6

Rationale: lets take the number as y when y is divided by 9 the remainder is 5 hence y can be written as y = 9 k + 5 multiplying by 3 will give 3 y = 27 k + 15 we can also write 3 y = 27 k + 9 + 6 now 27 k and 9 are divisible by 9 leaving the remainder as 6 hence e is the answer .
Answer: E