The GCF is 3.
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The GCF for 15 30 45 is 15.The GCF is 15.It is: 15
The GCF is 3.
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
Since 15 is a factor of 45, it is automatically the GCF.
The GCF is 15.