Question

HCF of 84 and 105 by prime factorisation​

Answer 1

Answer:

84 = 7*3*2^2

105 = 21*5

so as no common factor hcf is 1

Step-by-step explanation:

Answer 2

84 = 1 × 2 × 2 × 3 ×7.

105 = 1 × 3 × 5 × 7.

Common factor of 84 and 105 = 1, 3, 7.

Highest common factor of 84 and 105 = 3 × 7 = 21.