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The GCF of 40, 45, and 90 is 5

The factors of 40 are 1, 2, 4, 5, 8, 10, 20, and 40

The factors of 45 are 1, 3, 5, 9, 15, and 45

The factors of 90 are 1, 2, 3, 5, 6, 10, 15, 18, 30, 45, and 90

So the greatest common factor is 5.

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9y ago

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