The GCF is 15.
The GCF is 25.
The GCF is 175.
It is 15.
You need at least two numbers to find an HCF.
The GCF is 15.
25
25
25
It is 25
hcf stands for highest common factor, referring to factors that two numbers have in common, so it does not make much sense to ask for the hcf of a single number.However, you could ask,"what is the hcf of 175 and 175 ", which , of course, is 175.
The GCF is 15.