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Since the number 7 is prime, and is not a factor of 18, the greatest common factor (GCF) of these three numbers is 1.

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12y ago
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12y ago

The GCF is 1.

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9y ago

The GCF is 1.

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9y ago

The GCF is 2.

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Q: What is the GCF of 18 28?
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