if n divided by 7 has a remainder of 2 , what is the remainder when 6 times n is divided by 7 ?
"as per question = > n = 7 p + 2 for some integer p hence 6 n = > 42 q + 12 = > remainder = > 12 for some integer q alternatively = > n = 2 > 6 n = > 12 = > 12 divided by 7 will leave a remainder 5 hence d"
multiply(6, 2)