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What is the greatest common factor for 12 16 and 28

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12=\fbox2*\fbox2*3\\\\16=\fbox2*\fbox2*2*2\\\\28=\fbox2*\fbox2*7\\\\GCF(12;\ 16;\ 28)=\fbox2*\fbox2=\boxed{\boxed{4}}
User Jamie Fearon
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