Question

1. Find the LCM of 54 and 21.using prime factorisation method

Answer 1

Answer:

378

Step-by-step explanation:

Alternatively, the lcm of 54 and 21 can be found using the prime factorization of 54 and 21:

• The prime factorization of 54 is: 2 x 3 x 3 x 3

• The prime factorization of 21 is: 3 x 7

• Eliminate the duplicate factors of the two lists, then multiply them once with the remaining factors of the lists to get lcm(54,54) = 378

In any case, the easiest way to compute the lcm of two numbers like 54 and 21 is by using our calculator below. Note that it can also compute the lcm of more than two numbers, separated by a comma. For example, enter 54,21. Push the button only to start over.

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Answer 2

Answer:

378.

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Step-by-step explanation:

2*3*3*3*7=378.

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