if the remainder is 11 when the integer n is divided by 20 , what is the remainder when 2 n is divided by 10 ?
"n = 20 k + 11 2 n = 2 ( 20 k + 11 ) = 4 k * 10 + 22 = 4 k * 10 + 2 * 10 + 2 = 10 j + 2 the answer is c ."
subtract(multiply(11, 2), 20)