Question

Quantos números de pares, distintos, de quatro algarismos, podemos formar com os algarismos 0, 1, 2, 3 e 4 sem repeti-los?​

Answer 1

$\tt{Pares~com~zero~no~final}\\\sf{\underline{4}\cdot\underline{3}\cdot\underline{2}\cdot\underline{1}=24}\\\tt{Pares~sem~zero~no~final}\\\sf{\underline{3}\cdot\underline{2}\cdot\underline{1}\cdot\underline{2}=12}\\\rm{Ao~todo~teremos:}\\\huge\boxed{\boxed{\boxed{\boxed{\sf{24+12=36}}}}}$