It is: 1
20 and 24's highest common factor is four.
Since 28 is a factor of 84, it is automatically the GCF.
The greatest common factor refers to whole numbers, not decimals. Unless that's 16 and 80, in which case the GCF is 16.
Just 1.
The GCF is 1.
Just 1.
The only common factor of four and seven is one, because seven is a prime number.
The least common factor is: 1
You have infinite options of decimal points, but the obvious ones are: 3, 1.5 and 1
The greatest common factor of 40 and 65 is 5
The highest common factor of the four numbers is 1.
The greatest common factor of two and four is 2.