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 HCF of 30 and 105 is 15.
HCF of 735 and 1050 is 105.
Factor trees are ways of notating the process of finding a prime factorization, From there, you can determine the GCF. 105 35,3 7,5,3 225 75,3 25,3,3 5,5,3,3 Select the common factors. 3 x 5 = 15, the GCF.
The GCF/HCF of 360 and 225 is 45.
The GCF is 105.
For 225, 135, 105 the LCM is: 4,725
7
105
105
The hcf is 15.
105/225 = 7/15
The GCF/HCF of 100 and 225 is 25.