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In a general sense, it should be easy enough to differentiate between the highest and lowest anything, but let's get specific.

1, 2, 3, 5, 6, 10, 15, 30

1, 2, 3, 6, 7, 14, 21, 42

These are the factors of 30 and 42.

The highest number that appears on both lists is 6. That's the GCF.

The lowest number that appears on both lists is 1. That's the LCF.

Note that the LCF of any set of positive integers is 1.

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12y ago

What else can I help you with?