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Any two numbers that have a common factor greater than 1 will have a LCM less than their product, eg:

LCM(10, 15) = 30 < 10 x 15 = 150 (since HCF(10, 15) = 5)

LCM(6, 10) = 30 < 6 x 10 = 60 (since HCF(6, 10) = 2)

LCM(18, 27) = 54 < 18 x 27 = 486 (since HCF(18, 27) = 9)

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11y ago

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