Question

find the LCM and HCF of 6 and 20 by prime factorisation method.

Answer 1

hope it will help you

Answer 2

6=2×3 and 20=2×2×5 hair 2 is common in both but in the factor of 20 the number of 2 is more than 6 HCF will be 2 into 2 equal to 4 and LCM will be 2 into 2 into 3 into 5 equal to 60