No, 2 is a common factor of all even numbers but not necessarily the greatest common factor.
Take 40 and 32: 40:1,2,4,5,8,10,20,40 32:1,2,4,8,16,32
8 is the greatest common factor of these two even numbers.
No. Odd numbers only have odd factors. They could not have an even factor in common.
No, the GCF of 6 and 7 is 1.
No, always odd.
No. The GCF of 6 and 15 is 3.
No, but it's always an even number.
No.
Never.
No. Odd numbers only have odd factors. They could not have an even factor in common.
No.
No, the GCF of 6 and 7 is 1.
No. Because both numbers are even, they each have 2 as a factor. Even if they have a larger factor in common, it will be a multiple of 2, so the greatest common factor will be an even number.Yes. Two even numbers are each divisible by 2. The GCF must therefore always have two as one of its factors; this makes it even.
No, always odd.
No, always odd.
No. Every even number has a factor of 2. So any two even numbers share 2 as a factor. So the greatest common factor has to be at least 2.
The GCF is 2.
19 and 38
No, always odd.