Yes.
The factor is 1.
I think you meant to say that it's never greater than the least of the numbers.The easiest explanation is to simply remind you that the GCF is a factor of every numberin the group, and no factor of a number can be greater than the number itself.
15 is a number greater than 10 and a factor of 30.
4 is greater than 3 and is a factor of 20.
That is how they are defined. Any number greater than 1 is composite if it has a factor other than 1 and itself. If it is not a composite number then it is a prime number. It mustbe one or the other and the result follows.
No. No number can have a factor greater than itself.
31500 is a factor of 31500
No. A factor cannot be greater than the number it is compared to.
No.
Because every even number greater than 2 has two as a factor.
25 is an odd factor of 100.
Every number greater than 1 has the two factors 1 and the number itself.