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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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βˆ™ 8y ago
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βˆ™ 7y ago

1 and 3 are common factors to both numbers

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βˆ™ 12y ago

The GCF is 3.

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βˆ™ 8y ago

The highest common factor is 11

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βˆ™ 11y ago

just 1

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βˆ™ 7y ago

1, 3 and 9

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