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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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8y ago

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Wiki User

11y ago

The answer is 2 according to myfoundationslab.com

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Wiki User

8y ago

The GCF is 2.

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Wiki User

15y ago

its 10.

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Q: What is the greatest common factor of 40 100 20?
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