2. Both rows of the following grid have the same sum. What is the value of *?
\begin{tabular}{|r|r|r|r|r|r|r|r|r|r|c|}
\hline 1 & 2 & 3 & 4 & 5 & 6 & 7 & 8 & 9 & 10 & 1050 \\
\hline 11 & 12 & 13 & 14 & 15 & 16 & 17 & 18 & 19 & 20 & $*$ \\
\hline
\end{tabular}
2. 950
\begin{tabular}{|c|c|c|c|c|c|c|c|c|c|c|}
\hline 1 & 2 & 3 & 4 & 5 & 6 & 7 & 8 & 9 & 10 & 1050 \\
\hline 11 & 12 & 13 & 14 & 15 & 16 & 17 & 18 & 19 & 20 & $*$ \\
\hline
\end{tabular}

We observe that in all but the rightmost column the value in the second row is ten larger than the value in the first row. There are 10 such columns. Therefore the sum of the leftmost ten elements of the second row is 100 more than the corresponding sum in the first row. To achieve the same total in each row, * will need to be 100 less than the value above it. Therefore $*=950$.