Resposta :
(0.1.2.3.4.5.6.7.8.9)
(012)(013)(014)(015)(016)(017)(018)(019) = 8
(2.3.4.5.6.7.8.9) = 8 * 8 = 64
(0.1.2.3.4.5.6.7.8.9) = 64 * 10 = 640 formas - 20 números iguais = 620 formas
(012)(013)(014)(015)(016)(017)(018)(019) = 8
(2.3.4.5.6.7.8.9) = 8 * 8 = 64
(0.1.2.3.4.5.6.7.8.9) = 64 * 10 = 640 formas - 20 números iguais = 620 formas