Subject: Is zero an even or odd number?
Name: Christian P. Hansen
Who is asking: Other
Level: All

On a list I run, someone posted that 02-02-2000 was the first date since 28-08-888 where all the digits were even. Of course, this provoked a discussion of whether zero was odd, or even, or neither. I remember reading that, for symmetry's sake, it is considered by mathematicians to be even. Any thoughts?

Hi Christian,

I have seen some encyclopedias define "even" as any even number in the sequence 2,4,6,8... discounting both zero and negative numbers.

However, an even number is by definition an integer that when divided by two does not have a remainder. Since 0/2= 0 with a remainder of 0, zero is indeed an even number.


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