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# What is the highest common factor of 21and 27?

Updated: 8/29/2023

Wiki User

10y ago

Best Answer

The GCF is 9.

Wiki User

8y ago
This answer is:
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Wiki User

10y ago

The GCF is 3.

This answer is:

Wiki User

8y ago

The GCF is 9.

This answer is:

Wiki User

11y ago

9 is.

This answer is:

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The GCF is 3.

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