Din abc=15 => a,b,c∈[tex] D_{15} [/tex]={1,3,5,15}
Din a+b+c=9 => a<9, b<9, c<9 (nu putem avea egalitate, caci atunci celelalte doua at fi egale, iar problema cere distincte) =>a,b,c∈{1,3,5}
Solutie: (a.b.c)∈{(1,3,5);(1,5,3);(3,1,5);(3,5,1);(5,1,3);(5,3,1)}.
