Question

what is the greatest common factor of 65,143,and 169

Answer 1

$65|5\\13|13\\.\ 1|\\65=5\cdot\boxed{13}\\\\143|11\\.\ 13|13\\.\ \ 1|\\143=11\cdot\boxed{13}\\\\169|13\\.\ 13|13\\.\ \ 1|\\169=\boxed{13}\cdot13\\\\Therefore\ GCF(65;\ 143;\ 169)=\boxed{13}$