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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The GCF of 20, 35 and 45 is 5.
The GCF is 5.
The GCF is 5.
Factors of 12: 1, 2, 3, 4, 6, 12 Factors of 20: 1, 2, 4, 5, 10, 20 Factors of 45: 1, 3, 5, 9, 15, 45 GCF (12, 20, 45) = 1
The greatest common factor of 45 and 60 is 15.The least common multiple of 45 and 60 is 180.