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The GCF of 15 and 28 is 1.

The factors of 15 are 1, 3, 5, and 15

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

So the GCF of 15 and 28 is 1

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8y ago

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Wiki User

16y ago

The factors of 15 are 1, 3, 5, and 15. The factors of 28 are 1, 2, 4, 7, 14, and 28. The GCF of 15 and 28 is 1.

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Wiki User

10y ago

The GCF of 28 and 15 is 1.

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Q: What is the greatest common factor of 28 and 15?
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