you morons need to acquire some depth and IQ. The clue is CM=E but you are concentrating way too much on the 2 and not on what it sounds like. "Squared" means that the code is a square on the keypad and since the equation is backwards the square goes backwards. meaning the code is 1,4,7,8,9,6,3,2 in that order. it takes a great mind to come up with a tricky riddle like this so i give you props and a 5.