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Anonymous
5(5x2=10; 5x3=15; 5x9=45)
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The GCF is 5.
Since 15 is a factor of 45, it is automatically the GCF.
The GCF is 15.
The greatest common factor (GCF) of 15, 45, and 540 is 15.
GCF(15, 12, 45) = 3