if n divided by 7 has a remainder of 2 , what is the remainder when 5 times n is divided by 7 ?
"as per question = > n = 7 p + 2 for some integer p hence 5 n = > 35 q + 10 = > remainder = > 10 for some integer q alternatively = > n = 2 > 5 n = > 10 = > 10 divided by 7 will leave a remainder 3 hence c"
multiply(5, 2)