Respostas

2014-02-09T12:44:05-02:00
9.9.8=648 numeros
 os multiplos de10 de três algarismos distintos sâo:
{120,130,140,150,160,170,180,190,210,230,240,250,260,270,280,290,310,320,340,350,360,
370,380,390,410,420,430,450,460,470,480,490,510,520,530,540,560,570,580,590,610,620,
630,640,650,670,680,690,710,720,730,740,750,760,780,790,810,820,830,840,850,860,870,
890,910,920,930,940,950,960,970,980}
Multiplos de 10 de 3 algarismos distintos = 72 numeros