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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.
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When you times an odd by an even do you always get an odd number?
No. In fact, you NEVER get an odd number.
If you add 3 to an even number the sum would be odd or even?
Odd. Even + Even = Even Odd + Odd = Even Odd + Even = Even + Odd = Odd
Does multiplying an odd number by an even number give an even answer?
odd * odd = odd answer even * even = even answer odd * even = even answer
When you add to even numbers is the answer always even?
Yes. Even + Even = Even, Odd + Odd = Even and Even + Odd or Odd + Even = Odd
What is even times even equal?
even times even = even odd times odd = odd even times odd = even
When was Never Odd or Even created?
Never Odd or Even was created on 2004-11-09.
Is the gcf of a odd number and an even number always even?
The GCF of an odd and even number is never even.
Is it not true that the sum of two even numbers is never odd?
It is true that the sum of 2 even numbers is never odd
Can product of 2 odd no be even?
The product of two odd numbers is never even.
When is the square of an odd a even?
Never.
When you times an odd by an even do you always get an odd number?
No. In fact, you NEVER get an odd number.
Can the GCF of an odd number and an even number ever be even?
No. Odd numbers don't have even factors.
Is gcf of an odd number and an even number always even?
It is NEVER even. Because no even number can be a factor of the odd number.
Why does to even numbers equal a odd number?
What! Even numbers never equal an odd number. Not ever!
Is an even number plus an odd number even?
No, never is.
Is the greatest common factor of any odd number and even number always even?
No, always odd.
Irrational numbers are said to be never odd or even?
Yes, irrational numbers are neither odd nor even.
