What is the greatest common factor of 12?

Answer 1

The greatest COMMON factor depends upon the other number(s) with which 12 has factors in COMMON. However, it will always be one of the factors of 12 which are {1, 2, 3, 4, 6, 12}.

Examples:

GCF(12, 13) = 1
GCF(12, 14) = 2
GCF(12, 15) = 3
GCF(12, 16) = 4
GCF(12, 18) = 6
GCF(12, 24) = 12
You need more than one number to find a GCF.
You need at least two numbers to find a GCF.
You need at least two numbers to find a GCF.

Answer 2

"Common" means "same for both". There's no such thing as a "common" factor of

only one number. There has to be two or more of them, then a "common" factor is

a number that's a factor of all of them.

Also ... we don't think you'll ever get far enough to need this but we have to

mention it anyway ... if you're looking for the greatest common factor, then you're

only going to get one of them. If there were two greatest common factors, then

people would ask you which greatest common factor was greater than the other

greatest common factor.

Answer 3

It is not possible to give a sensible answer to this question. The greatest common factor (GCF) refers to a factor that is COMMON to two or more numbers. You have only one number in the question!

Answer 4

A greatest common factor is used to compare two or more numbers. A single number cannot have a greatest common factor.

Answer 5

12 and 24, among others.