How should I proceed to obtain the following table:
What I've tried is:
\begin{tabular}{ | c | c | c | c | c | }
\hline
7 & 4 & 7 & 9 & 27\\ \hline
10 & 9 & 9 & 6 & 34\\ \hline
17 & 13 & 16 & 15 & \multicolumn{1}{r}{ } \\ \hline
\end{tabular}
but it does not work anymore.
Thanks!

\cline{1-4}instead of\hlinein the last line -- it will prevent the full line and print a line only for the first 4 cells, what's requested, most likely – May 29 '16 at 15:38