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The factors of 45 are:

1, 3, 5, 9, 15, 45

The factors of 81 are:

1, 3, 9, 27, 81

The common factors are:

1, 3, 9

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8y ago

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More answers

1 and 3 are common factors to both numbers

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7y ago
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The GCF is 3.

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12y ago
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The highest common factor is 11

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9y ago
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just 1

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Wiki User

11y ago
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1, 3 and 9

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Wiki User

7y ago
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Q: What is the common factor of 63 and 81?
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