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Greatest common factor (GCF) is a number that is greatest among the
\common factors of the numbers.
\List the factors of each number.
\Factors of 54 : 2, 3, 6, 9, 18, 27, 54
\Factors of 89 : 89
\There are no common prime factors.
\Two numbers always have 1 as a common factor. So, the GCF is 1.![\"\"](\"http://www.mathskey.com/userfiles/image/steps_images/solution.JPG\")
There are no common prime factors.
\Two numbers always have 1 as a common factor. So, the GCF is 1.