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What is the greatest common factor of 42 and 63

What is the greatest common factor of 42 and 63
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What is the greatest common factor of 42 and 63

User Aleksei Khatkevich
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42|2\\21|3\\.\ 7|7\\.\ 1|\\42=2*\fbox3*\fbox7\\\\63|3\\21|3\\.\ 7|7\\.\ 1|\\63=\fbox3*3*\fbox7\\\\GCF(42;\ 63)=\fbox3*\fbox7=\boxed{\boxed{21}}
User FDuhen
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