The common factors of 15 and 75 are: 1, 3, 5, and 15 of which 15 is the HCF of 15 and 75
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Factors of 15: 1, 3, 5, 15Factors of 75: 1, 3, 5, 15, 25, 75GCF (15, 75) = 15
The highest common factor of 60 and 75 is 15
90 and 75's highest common factor is 15.
The greatest common factor of the numbers 45, 75 and 90 is 15.
The GCF is 15.