Question

Find the H.C.F. using the method of common factors

$\text{27 and 63}$

Answer 1

Step 1 Finding the factors of $27$

The factors of $\text{27 are 1, 3, 9 and 27}$

Step 2 Finding the factors of $63$

The factors of $\text{63 are 1, 3, 7, 9, 21 and 63}$

Step 3 Finding the common factors

The common factors are $\text{1, 3 and 9}$

Thus, the highest common factor is $9$

Hence, the H.C.F. of $\text{27 and 63 is 9}$