Question

find L.C.M of 72,90, using prime factorizing method
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Answer 1

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question-find L.C.M of 72,90, using prime factorizing method

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answer-

72=2*2*2*3*3

90=2*3*3*5

now lcm= common prime numbers to the highest power

therefore

the answer is

360

Answer 2

Answer:

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The prime factorization of 72 is: 2 x 2 x 2 x 3 x 3

The prime factorization of 90 is: 2 x 3 x 3 x 5

Multiply each factor the greater number of times it occurs in steps i) or ii) above to find the lcm:

LCM = 2 × 2 × 2 × 3 × 3 × 5

LCM = 360