The factors of 75 are: 1, 3, 5, 15, 25, 75
The factors of 180 are: 1, 2, 3, 4, 5, 6, 9, 10, 12, 15, 18, 20, 30, 36, 45, 60, 90, 180
The common factors are: 1, 3, 5, 15
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If you mean 300 and 450 then the GCF is 150
The greatest common factor of the numbers 180 and 150 is 30.
GCF of 90 and 75 is 15.
The GCF is 1.
The GCF of 65 and 75 is 5.