The greatest common factor of 54 and 102 is 6.
The greatest common factor (GCF) is often also called the greatest common divisor (GCD) or highest common factor (HCF). Keep in mind that these different terms all refer to the same thing: the largest integer which evenly divides two or more numbers.
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The greatest common factor (GCF) refers to a factor that is COMMON to two or more numbers. You have only one number in the question! The greatest factor of any number is itself.
Since 54 is a factor of 108, it is automatically the GCF.
Since 54 is a factor of 108, it is automatically the GCF of this problem.
The GCF is 54.
The GCF is 27.
The GCF is 27.