Question

Find the HCF of 84 and 144 by prime factorisation method.

Answer 1

Prime Factorisation of

84 = 2 × 2 × 3 × 7

144 = 2 × 2 × 2 × 2 × 3 × 3

So, HCF of 84 and 144 = 2 × 2 × 3

= 12