[tex]\overline{abcabc}[/tex]
[tex]2a + 2b + 2c = 6 \: | \div 2[/tex]
[tex]a + b + c = 3[/tex]
[tex]1 + 0 + 2 = 3[/tex]
[tex]1 + 2 + 0 = 3[/tex]
[tex]2 + 0 + 1 = 3[/tex]
[tex]2 + 1 + 0 = 3[/tex]
Numerele sunt :
*102 102,102 120,102 201,102 210
*120 102,120 120,120 201,120 210
*201 102,201 120,201 201,201 210
*210 102,210 120,210 201,210 210
=>16 numere