Question

find L.C.M. by prime factorisation method 16,64​

Answer 1

The prime factorization of 16 is: 2 x 2 x 2 x 2

The prime factorization of 64 is: 2 x 2 x 2 x 2 x 2 x 2

Eliminate the duplicate factors of the two lists, then multiply them once with the remaining factors of the lists to get lcm(16,16) = 64

Lcm of 16 and 64 is 64.

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Hope it helps you.

Answer 2

prime factorisation of 16 is :2×2×2×2

....................................of 64 is:2×2×2×2×2×2

LCM of (16×64)=64