Question

Quantos numeros pares de 5 algarismos distintos podem ser formdos com os algarismos 0,1,2,3,4,5,6 e 7

Answer 1

$\Large\boxed{\begin{array}{l}\underline{\rm Pares\,com\,zero\,no\,final:}\\\sf\underline{6}\cdot\underline{5}\cdot\underline{4}\cdot\underline{3}\cdot\underline{1}=360\\\underline{\rm Pares\,sem\,zero\,no\,final:}\\\sf\underline{6}\cdot\underline{6}\cdot\underline{5}\cdot\underline{4}\cdot\underline{3}=2160\\\\\underline{\boldsymbol{ Ao\,todo\,teremos:}}\\\sf360+2160=2520\end{array}}$