Any number that is not an integer is neither even nor odd.
For example, decimals such as 8.5, or pi, are neither even nor odd. While the numerator or denominator of a fraction is either even or odd, the fraction is not.
Some people mistakenly say that 0 is neither even nor odd. But according to its additive properties, zero is even. The integer 0 is not the same thing as the null set. 0 is the number of elements in the null set. Zero is a number, not a set.
Please read the article "Parity of zero" in the Related Links section for a discussion about the misconceptions about the number 0.
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The concept of odd and even can only be applied to integers. So 3.5 is neither odd nor even.
Only integers are even or odd. If a decimal is equal to an integer (for example 24.0 is equal to 24), then it can be even or odd. If a decimal is not equal to an integer (for example, 24.1 is not an integer), then it is neither even nor odd.
An even number can be divided by 2 evenly. An odd number will have a remainder of 1 when divided by 2. 32.5 is neither.
The sum of three whole odd numbers will always be odd keeping in mind that zero is neither even nor odd and that 'null' is not a number.
Decimal numbers generally are not considered to be odd or even. Only integers are odd or even. So on that basis, 3.6 is not an odd number, but neither is it an even number.