Question 1197897
An even number is a number which when divided by 2, leaves no remainder.

0 / 2 = 0  (no remainder, so zero is even since it passes the zero remainder test)


On a related note about zero (0): zero is neither negative nor positive.  So when a problem says something like 'x is a positive number' you are dealing with a number that is strictly greater than zero.   When the author wishes to include zero, you might see wording such as 'x is a nonnegative number...'.