First, write both numbers as the product of their prime factors:
9 = 3x3
12 = 2x2x3
The next step is to identify any common prime factors. In this case, both numbers have 3 as a prime factor. Therefore, the HCF of 9 and 12 is 3.
1
It is: 36
The GCF is 3.
180
It is: 72
The HCF of 12 and 60 is 12
The GCF is 12.
The GCF is 2.
36
3
The HCF of 40 & 12 is... 4
The hcf of 12 & 36 is 12