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The factors of 30 are:

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

The factors of 140 are:

1, 2, 4, 5, 7, 10, 14, 20, 28, 35, 70, 140

The common factors are:

1, 2, 5, 10

The Greatest Common Factor (GCF) is:

10

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12y ago

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