The greatest common factor (GCF) refers to a factor that is COMMON to two or more numbers. You have only one number in the question! The greatest factor of any number is itself.
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GCF of 90 and 75 is 15.
Since 15 is a factor of 75, it is automatically the GCF. Since 75 is a multiple of 15, it is automatically the LCM.
The GCF is 15.
The GCF is 15.
Factors of 15: 1, 3, 5, 15Factors of 75: 1, 3, 5, 15, 25, 75GCF (15, 75) = 15