Question

find the HCF and LCM of 42 and 70 and verify the relationship between them​

Answer 1

Alternatively, the lcm of 42 and 70 can be found using the prime factorization of 42 and 70: The prime factorization of 42 is: 2 x 3 x 7. The prime factorization of 70 is: 2 x 5 x 7. Eliminate the duplicate factors of the two lists, then multiply them once with the remaining factors of the lists to get lcm(42,42) = 210.