What are the divisibility rules of multiples of 4?

Answer 1

100 divides evenly by 4. Therefore any digits apart from the tens and units are irrelevant. 4 is the product of 2 and 2. Thus you can tell if a number divides by four if the last two digits can divide by 2 twice. This is easily checkable by dividing by 2 once and seeing if the answer is even. For instance, to check 57,384 we would just look at the last two digits (84) and divide them by two. That gives us 42 which is even so we can say that 57,384 is divisible by 4.