I changed the tag from "calculus" to "integers" as this question is definitely not calculus. If someone else can think of a better tag, feel free to change it.
– JimmyK4542Jun 08 '15 at 17:49
Numbers were last digit is zero, are even. The number Zero is neither odd nor even. See => Number Zero parity | zero http://tinyurl.com/oexhr3k . You have +1 from me for good Q.
– Oct 26 '15 at 14:17