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-- The common factors of 3, 15, and 9 are 1 and 3 .

-- Their greatest common factor is 3 .

-- When discussing numbers, there is no such thing as the 'most' common factor.

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11y ago
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9y ago

The GCF is 3.

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9y ago

The GCF is 1.

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10y ago

GCF(9, 15, 20) = 1.

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Q: What is the most common factor of 3 15 and 9?
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