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The GCF of 9, 18, and 42 is 3.

The factors of 9 = 3*3

The factors of 18 = 2*3*3

The factors of 42 = 2*3*7

So the greatest common factor = 3.

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6y ago
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14y ago

There can only be one "greatest".

For these three numbers, it's '3'.

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14y ago

The greatest for these three numbers, is 3.

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8y ago

The GCF is 3.

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12y ago

GCF(9, 18, 42) = 3

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Q: What is the greatest common factor of 9 18 and 42?
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