The GCF of 90, 120, and 180 is 30.
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60
The GCF is 15.
The Greatest Common Factor of 108, 180, 75 is 3.
The greatest common factor of the numbers 120, 180 and 240 is 60. The GCF can't be any larger than the smallest difference between the numbers, which is 60. It is easy to see that 60 is a factor of each of the numbers in the set, so it is the GCF.
The Greatest Common Factor (GCF) is: 20