Question 10
Find the missing number.
$\begin{array}{rrrr}5&2&3&10\\6&4&1&11\\1&9&?&12\\12&?&6&?\end{array}$
Answer entry: enter the three missing values in reading order (row 3 column 3; row 4 column 2; row 4 column 4), separated by semicolons.
**Editorial input note:** Use no spaces before or after semicolons.
$\begin{array}{rrrr}5&2&3&10\\6&4&1&11\\1&9&?&12\\12&?&6&?\end{array}$
Answer entry: enter the three missing values in reading order (row 3 column 3; row 4 column 2; row 4 column 4), separated by semicolons.
**Editorial input note:** Use no spaces before or after semicolons.