1 and 2
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The greatest common factor of 54 , 90 = 18
The factors of each number are:54 -> 1, 54, 2, 27, 3, 18, 6 & 938 -> 1, 38, 2 & 19The common factors are in bold, with the highest common factor being 2
The GCF is 18.
The GCF of 18, 54, and 72 is 18.The GCF is 18.
The GCF is 18.