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The factors of 21 are 1 x 3 x 7 x 21.

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

The GCF of 21 and 28 is 7.

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Q: What are the numbers between 15 and 30 that have 7 as their GCF?
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Related questions

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15, 30 and 45 have a GCF of 15.


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