Answer: GCD: 2 - LCM: 378
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The greatest common factor of 54 and 80 is 2
The greatest common factor of 54 and 90 is 18.
The Greatest Common Factor (GCF) of 36, 54, and 63 is: 9
The Greatest Common Factor is 6
Since 27 is a factor of 54, and 27 cannot have a larger factor than itself, the greatest common factor of 27 and 54 is 27.