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The factors of 28 are 1, 2, 4, 7, 14, 28.

The factors of 42 are 1, 2, 6, 7, 21, 42.

The factors of 7 are 1, 7.

The GCF of 7, 28, and 42 is 7.

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10y ago
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6y ago

The GCF is 7.

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Q: What is the greatest common factor of 28 42 and 7?
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