Question

Quantos números pares de 3 algarismos distintos podemos formar com os algarismos 0,1,2,3,4,5 e 6?

Answer 1

$\tt{\underline{Pares~com~zero~no~final:}}\\\sf{\underline{6}\cdot\underline{5}\cdot\underline{1}=30~n\acute{u}meros~pares}\\\tt{\underline{Pares~sem~zero~no~final:}}\\\sf{\underline{5}\cdot\underline{4}\cdot\underline{3}=60~n\acute{u}meros~pares}\\\rm{\underline{Ao~todo~teremos}}\\\large\boxed{\boxed{\boxed{\boxed{\sf{60+30=90~n\acute{u}meros~pares}}}}}$