The HCF of 30 and 105 is 15.
30 is the hcf of 150 and 240.
HCF of 735 and 1050 is 105.
25
The GCF is 25.
The GCF is 105.
105
7
105
The hcf is 15.
It is not possible to give a sensible answer to this question. The highest common factor (HCF) refers to a factor that is COMMON to two or more numbers. You have only one number in the question!
The GCF is 15.