Question 1
If $a$ and $b$ are digits for which $$
\begin{array}{r} 2a\\[-2pt] {}\times b3\\ \hline 69\\ 92\phantom0\\ \hline 989 \end{array}
$$ then $a+b=$
\begin{array}{r} 2a\\[-2pt] {}\times b3\\ \hline 69\\ 92\phantom0\\ \hline 989 \end{array}
$$ then $a+b=$