The GCF is, yes.
The GCF will, yes.
No, their GCF is always odd.
Not sure what the GFC is but if you meant GCF, the answer is no, it is never even.
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.
No, it is not true: it depends on what your numbers are.
false. it is always even
Yes.
When you add them, you always get an even number; when you multiply them, the result is always odd.
Yes.Yes.2 can never be a factor of an odd number and because of that it can't be a common factor of any number pair where at least one of numbers is odd.
There are two truths about odd numbers. When added you get an even number... always! When multiplied you get an odd number... always!
Yes.
false even not odd 7 + 3 = 10 41 + 5 = 46 and so on ... . when you add 2 odd numbers your answer will always be even