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Factor them.

3 x 5 = 15

2 x 2 x 2 x 5 = 40

Select the common factor.

The GCF is 5.

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11y ago
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Wiki User

10y ago

HCF of 15 and 45 is 15

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Wiki User

7y ago

The greatest common factor is five.

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Wiki User

10y ago

The GCF is 5.

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Q: How do you get the factor of 15 45?
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