Two or more numbers are needed to find their greatest common factor.
You need at least two numbers to find a GCF.
You need at least two numbers to find a GCF. There cannot be a greatest common factor if there are not at least two numbers to compare. The greatest common factor is the largest factor that all the numbers have in common - the largest factor that they all share.
It is meaningless to ask "What are the greatest common factor of 9". There should be two or more numbers. Greatest common factor means the greatest number which is the common factor of all the numbers mentioned.
Two or more numbers are required to find the greatest common factor between them.
There is no Greatest Common Factor (GCF) for a single number. The Greatest Common Factor (GCF) is the largest factor common to two or more given numbers.
You need at least two numbers to find a GCF.
At least two or more numbers must be given to find their greatest common factor
You need at least two numbers to find a GCF.
To find a common factor, you need at least two numbers.
There cannot be a greatest common factor of just one number. To be common there need to be at least two numbers. If you find all the factors of two or more numbers, and you find some factors are the same ("common"), then the largest of those common factors is the Greatest Common Factor.
You need at least two numbers to find a GCF.