The gcf of any two odd numbers is always odd

True, greatest common factor of 2 odd numbers will always end up as odd numbers.
What is GCF by the way, GCF or also known as greatest common factor is the 2 numbers largest factor that they have in common.
 In order to check if 2 odd numbers’ GCF will always be odd number, is to try to choose any to odd numbers, then write down all the factors they have. Next look for the greatest factor they have in common and check if it’s an odd number.

Wow. that is a really cool question.