The GCF is 1.
The greatest common factor of 12 and 20 is 4.
5
20 and 24's highest common factor is four.
Since 2 is a factor of 20, it is automatically the GCF.
Since 2 is a factor of 20, it is automatically the GCF.
The GCF is 10.
The GCF is 5.
The greatest common factor refers to whole numbers, not decimals. Unless that's 16 and 80, in which case the GCF is 16.
The only common factor is 1.
The only common factor is 1.
2
Since 17 is a prime number, the greatest common factor of 17, 18, and 20 is 1.