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Even or odd is a property that only integers (the whole numbers, including positives, negatives, and zero) have. We do not call other numbers (fractions, Irrational Numbers, imaginary numbers, and so on) either even or odd.

Q: Is pi odd or even

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Any number that is not an integer is neither even nor odd. For example, 8.5, pi, the square root of 2 are all neither even nor odd. Every integer (including 0) is either even or odd. 0 is even since it is divisible by 2: 0 / 2 = 0

Odd. Even + Even = Even Odd + Odd = Even Odd + Even = Even + Odd = Odd

I do not understand the significance of the word "riddle" in the question, but related to math, non-integers are neither odd nor even. For example, 1.5 and pi are neither even nor odd. 0 is an even number. See "Parity of Zero" in the Related Links for a discussion of why many people mistakenly believe 0 is not even.

odd * odd = odd answer even * even = even answer odd * even = even answer

Yes. Even + Even = Even, Odd + Odd = Even and Even + Odd or Odd + Even = Odd

Related questions

Any number that is not an integer is neither even nor odd. For example, 8.5, pi, the square root of 2 are all neither even nor odd. Every integer (including 0) is either even or odd. 0 is even since it is divisible by 2: 0 / 2 = 0

Only integers (the whole numbers, including zero and negative whole numbers) are odd or even. Other numbers (like irrational numbers, fractions that don't simplify to integers, imaginary numbers, and so on) are neither odd nor even.

Odd. Even + Even = Even Odd + Odd = Even Odd + Even = Even + Odd = Odd

odd * odd = odd answer even * even = even answer odd * even = even answer

even times even = even odd times even = even odd times odd = odd

Yes. Even + Even = Even, Odd + Odd = Even and Even + Odd or Odd + Even = Odd

I do not understand the significance of the word "riddle" in the question, but related to math, non-integers are neither odd nor even. For example, 1.5 and pi are neither even nor odd. 0 is an even number. See "Parity of Zero" in the Related Links for a discussion of why many people mistakenly believe 0 is not even.

No. Sum of odd + odd = even Sum of odd + even = odd Sum of even + even = even

Always. even + even = even odd + odd = even even + odd = odd odd + even = odd To summarise, if you add like numbers you get even, otherwise you get odd.

even times even = even odd times even = even odd times odd = odd

it is even

even times even = even odd times odd = odd even times odd = even