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255 = 3 x 5 x 17
243 = 35
gcf = 3
The GCF is 9.
255 = 51 x 5 so 51 is GCF
85
9
How about: 243 = 243.0
The GCF is 1.
The GCF is: 27
The GCF is 81.
The GCF is 5
The GCF of 255 and 256 is 1.
The GCF is 2.