Each row/column use the numbers 1,2,3 in 3*3 square
Source: 1993 AMC 8 Problem 14
June 28, 2011
AMC
Problem Statement
The nine squares in the table shown are to be filled so that every row and every column contains each of the numbers . Then \begin{tabular}{|c|c|c|} \hline
1 & & \\ \hline
& 2 & A \\ \hline
& & B \\ \hline
\end{tabular}