MathDB
Match the numbers

Source:

November 13, 2005

Problem Statement

If aa and bb are digits for which
\begin{tabular}{ccc} & 2 & a\\ ×\times & b & 3\\ \hline & 6 & 9\\ 9 & 2\\ \hline 9 & 8 & 9\end{tabular}
Then a+b=a+b =
A. 3 B. 4 C. 7 D. 9 E. 12
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