[tex]\overline{16x}~\vdots~ 9 ~~\Longrightarrow~~ \{162\} ~~~\text{deoarece } 1+6+2 = 9 \\ \\
\overline{3x4}~\vdots~ 9 ~~\Longrightarrow~~ \{324\} ~~~\text{deoarece } 3+2+4 = 9 \\ \\
\overline{6xx}~\vdots~ 9 ~~\Longrightarrow~~ \{666\} ~~~\text{deoarece } 6+6+6 = 9 [/tex]