if n divided by 7 has a remainder of 1 , what is the remainder when 3 times n is divided by 7 ?
"as per question = > n = 7 p + 1 for some integer p hence 3 n = > 21 q + 3 = > remainder = > 6 for some integer q alternatively = > n = 2 > 3 n = > 3 = > 3 divided by 7 will leave a remainder 3 hence c"
multiply(3, 1)