Question

Find the HCF of 36 and 9​

Answer 1

Answer: 9
The common factors of 36 are 1, 2, 3, 4, 6, 9, 12, 18 and 36.
The common factors of 9 are 1, 3 and 9.
The largest common factor or the highest common factor of 36 and 9 is 9.

Answer 2

Prime factorize them individually

`36 = 2 * 2 * \boxed3 * \boxed3 * 1\\ 9 = \boxed3 * \boxed3 * 1`

Thus,

`HCF = {3}^(2) =9`