Aflati suma nr.de forma a3a .

Răspuns :

[tex] \overline{a3a} \: : \: 131,232,333 ,434,535,636,737,838,939[/tex]

[tex]1 3 1 + 232 + 333 + 434 + 535 + 636 + 737 + 838 + 939 = 4815[/tex]