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Smoothly. Example: 30 and 42

Factor them.

2 x 3 x 5 = 30

2 x 3 x 7 = 42

The common factors are the GCF.

2 x 3 = 6

All the factors, eliminating duplicates, are the LCM.

2 x 3 x 5 x 7 = 210

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13y ago

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