What is the HCF of 11 and 9?

Answer 1

To find the HCF of two numbers you first need to identify their prime factors. In this case we have:

11 = 11

9 = 3x3

The next step would be to identify any common prime factors. In this case there are none. Thus the hcf of 11 and 9 is simply 1.

Answer 2

The GCF is 1.

Answer 3

1