How can 0 be even?

We need to refer to the mathematical definition of the Word "even."

The most commonly accepted definition is that a number "a" is even if there exists an integer "n" which makes the following statement true:

a = 2 x n

0 is an integer. So let n = 0 in the above equation and we get:

0 = 2 x 0

So 0 satisfies the mathematical definition for being even.

Please refer to the article in the "related links" section for a discussion about the misconceptions about zero and why people mistakenly think it is not an even number.