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Factors of 63: 1, 3, 7, 9, 21, 63.

Factors of 84: 1, 2, 3, 4, 6, 7, 12, 14, 21, 28, 42, 84.

Factors of 126: 1, 2, 3, 6, 7, 9, 14, 18, 21, 42, 63, 126.

GCF (63, 84, 126) = 21

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Q: What is the greatest common factor of 63 84 126?
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