[tex]\it 3.\\ \\ n:11=3\ rest\ r \Rightarrow n=11\cdot3+r =33+r,\ unde\ r<11\\ \\ Deci,\ n\in\{33,\ \ 34,\ \ 35,\ \ ... ,\ \ 43\} \Rightarrow 11\ numere[/tex]
[tex]\it 4.\\ \\ a)\ \overline{17x}\ \vdots\ 2 \Rightarrow x\in\{0,\ \ 2,\ \ 4,\ \ 6,\ \ 8\}\\ \\ b)\ \overline{27y}\ \vdots\ 5 \Rightarrow y\in\{0,\ \ 5\}[/tex]
