Greatest common factor of 3 and 7?

Answer 1

The greatest common factor of any number and itself must be that number. Here is why this is true. The factor of 7 are 1 and 7. So the common factors are 1 and 7 if you look at 7 and itself and the greatest of those two is 7.

The GCF of 101 and 101 is 101. Just to drive the point home.

Answer 2

You need at least two numbers to find a GCF.

Answer 3

There is not enough information to identify the mystery pair.

Answer 4

But they could be 14 and 21.

Answer 5

The GCF is 1.

Answer 6

7 and 14

21 and 28

Answer 7

7 and 14, among many others.

Answer 8

The GCF is 7.

Answer 9

GCF(7, 7) = 7.