The GCF is 9.
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9 is the greatest common factor of 18, 45 and 54.
The greatest common factor of 18 and 45 is 9.
The greatest common factor of 45 and 225 is 15.The GCF is: 45
The greatest common factor of 26 and 45 is 1.
The greatest common factor of 90 , 30 , 45 = 15