First, the G in GCF stands for Greatest. Greatest is a superlative and that means there can be only one.
Second, the C in GCF stands for Common. And that is in reference to a factor that is common to two or more numbers - not just one, as is the case in this question.
You can't have a GCF of one number. You need at least two numbers to find a GCF.
3
The greatest common factor of 15 and 105 is 15.
The greatest common factor for 15 and 16 is 1.
The greatest common factor of 15 and 55 is 5.
The greatest common factor of 15 and 32 is 1
The greatest common factor of 15 and 110 is 5.
3 is the greatest common factor of 69 and 15.
The Greatest Common Factor (GCF) is: 15
5 is the greatest common factor.
The greatest common factor of 15,45, and 90 is 15.
The greatest factor of 15 is 15. The greatest factor of 20 is 20. The greatest common factor of 15 and 20 is 5.
greatest common factor of 75 30 is 15.
Since 15 is a factor of 60, it is automatically the GCF.