I would use the table function then.

\begin{array}{|c|c|c|}\hline

16 & 02 & 03 \\ \hline

05 & 11 & 10 \\ \hline

09 & 07 & 06 \\ \hline

\end{array}

\begin{array} \end{array} mark the start and the end of the table.

{c} denotes the number of columns. In my example, I have 3 c's and hence, 3 columns

{|c|} would mean one column sandwiched between two vertical lines. If I put {|c} then, I would have only one vertical line on the left.

& switches column

\\ as you know changes row

\hline I think means headline or something similar which inserts an upper horizontal line above the row.