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The GCF of 20 and 66 is 2.

The prime factorization of 20 is 2*2*2

The prime factorization of 66 is 2*3*11

Their only common factor is 2, so it is their GCF.

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8y ago
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8y ago

The GCF of 40 and 66 is 2.

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12y ago

The GCF is 2.

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Q: What is the greatest common factor of 40 and 66?
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