The GCF is 9.
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gcf(27, 45, 63) = 9. 27 = 3 x 3 x 3 45 = 3 x 3 x 5 63 = 3 x 3 x 7 hcf = 3 x 3 = 9
The same as the GCF of 63 and 45 (where 45 is the remainder of the division of 927 by 63).
The GCF is 9.
You need at least two numbers to find a GCF. If that's 6 and 27, the GCF is 3.
The GCF of 9, 27, and 45 is 9.