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Prime factorization of 90 = 2 x 3 x 3 x 5

Prime factorization of 120 = 2 x 2 x 2 x 3 x 5

HCF(90,120) = 2 x 3 x 5 = 30.

LCM of two numbers a and b = Product of a and b/ HCF(a,b)

LCM(90,120) = (90 x 120)/30 = 3 x 120 = 360.

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Q: What is the least common multiple of 120 and 90?
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