[tex]Pentru~ca~un~numar~sa~fie~divizibil~cu~3\\
obligatoriu,suma~cifrelor~acestuia~trebuie~sa~se\\
imparta~la~3.\\
301x|3=\ \textgreater \ 3+0+1=4,numarul~poate~deveni~4x|3=\ \textgreater \ 4+x=6\\
=\ \textgreater \ x=6-4=\ \textgreater \ x=2(este~6~deoarece~6,este~cel~mai~mic~numar\\
ce~se~imparte~exact~la~3,dupa~3.)\\\\
Numarul~este:3012\\
deoarece~3+0+1+2|3=\ \textgreater \ 6|3[/tex]
