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3, 4, and 7 are the common factors of 9 12 and 21.

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7y ago

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The prime factors of 9 are 3 and 3

The prime factors of 12 are 2, 2 and 3

So, the only factor common between 12 and 9 is 3

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14y ago
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1 and 3

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12y ago
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Q: What are the common factors for 12 and 9?
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