Question

find the LCM and HCF by prime factorisation method 12,28​

Answer 1

Step-by-step explanation:

$prime \: factors \: of \: 12 = 2 \times 2 \times 3 \\ prime \: factors \: of \: 28 = 2 \times 2 \times 7 \\ H. C. F = 4 \\ L. C. M = 4 \times 3 \times 7 \\ = 84$

H. C. F = common factors

L. C. M= common factors * non common factors