In mathematics, the greatest common factor of 13 is 1.
It is: 15
The GCF is 9.
You need at least two numbers to find a GCF and there can only be one GCF per set of numbers. Other than that...
5 and 10
The GCF is 6.
One per set of numbers.
The GCFs are 12, 6, 14, 24, 13 and 4 respectively.
Since numbers don't stop, GCFs don't either. To Infinity and beyond!
The GCFs are 2, 1, 3, 1 and 1
That's backwards. The GCF of 160 and 20 is 20.
2 and 4 are factors of 8. GCFs happen when you compare two or more numbers.
You need at least two numbers to find a GCF. If that's 55 and 9, or 5 and 59, their GCFs are both 1.