Question

Which pair of numbers have a greatest common factor of 7?

Answer 1

Let me help you out there!

The correct answer is

7 and 14

and

28 and 7

14-7=7

and Idk abt 28 and 7 but anyways

heres proof btw

Answer 2

The GCF is the number that is a factor of both (or all) of the numbers of a given set and which is the biggest factor of this kind (often the smaller number of the two)

7 and 14 have a greatest common factor of 7.

 28 and 7 also have a GCF of 7, so the first two responses fit.

21 and 3 have a GCF of 3, so that isn't correct.

7 and 1 have a GCF of 1, so that's incorrect as well.