The GCF of any two odd numbers is always odd. The GCF of any two even numbers is always even. The GCF of an odd and an even number is always odd.
No, always odd.
Yes.
Yes.
The GCF of any two odd numbers is always odd because odd numbers don't have any even factors. The GCF of any two even numbers is always even because even numbers are divisible by two and any common factors would have at least one two in common. The GCF of an even and an odd number is odd because odd numbers don't have any even factors.
The GCF will, yes.
The GCF is, yes.
Yes.
True.
No. The gcf of 98 and 100 is 2 .
Yes.
Odd numbers only have odd factors. The GCF would have to be odd.