54.By the way, what does what and mean?
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The GCF is 3x
Factor them.2 x 3 x 3 = 182 x 3 x 5 = 30Combine the factors, eliminating duplicates.2 x 3 x 3 x 5 = 90, the LCM
The factors of 18 are:1, 2, 3, 6, 9, 18The factors of 27 are:1, 3, 9, 27The common factors are:1, 3, 9The Greatest Common Factor:GCF = 9