What is the greatest common factor of 42 and 63

asked Feb 24, 2016 207k views

3 votes

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5 votes

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

FDuhen answered Mar 1, 2016

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