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The greatest common factor (GCF) of 63, 21, and 7 is 7.

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12y ago

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Since 7 is a factor of 21, it is automatically the GCF.

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Wiki User

11y ago
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The GCF is 7.

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Wiki User

9y ago
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It is: 7

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Wiki User

12y ago
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It is: 7

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Wiki User

8y ago
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Q: What is the GCF of 63 21 and 7?
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