Answer :

konrad509
[tex]15+81=3\cdot5+3\cdot27=3(5+27)[/tex]
mariamikayla
[tex]15+81=3(5+27) \to 3*32 =\boxed{96} \\\\ 15|3 \\ 5 \ |5 \\ 1 \\\\15=3*5 \\\\\\ 81|3 \\ 27|3 \\ 9 \ |3 \\ 3 \ |3 \\ 1 \\\\ 81=3^4 \\\\ G.C.F(15;81)=3[/tex]

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