To find the GCF of two numbers, you first need to express them as the product of their prime factors. For 14 and 27, this is:
14 = 2x7
27 = 3x3x3
The next step would be to identify any common factors. In this case, however, there are no common prime factors. Therefore, the GCF of 14 and 27 is 1.
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The GCF of 14 and 48 is 2. The GCF of 81 and 135 is 27. The GCF of all four is 1.
If you mean 18, 27 and 63 then the GCF is 9
The GCF is 27.
14The GCF is 14.
The Greatest Common Factor (GCF) of 27, 81, and 54 is 27.