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LCM of two numbers is their product divided by their HCF.

First find HCF:

462 = 2 x 3 x 7 x 11; 630 = 2 x 3 x 3 x 5 x 7.

The common factors are 2 x 3 x 7 ie HCF = 42

LCM is therefore 462 x 630 / 42 ie 11 x 630 = 6930

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Q: What is the LCM of 462 and 630?
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