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
Chat with our AI personalities