Question 14
In this addition problem, each letter stands for a different digit. $$
\begin{array}{cccc}&T & W & O\\ +&T & W & O\\ \hline F& O & U & R\end{array}
$$ If $T = 7$ and the letter $O$ represents an even number, what is the only possible value for $W?$
\begin{array}{cccc}&T & W & O\\ +&T & W & O\\ \hline F& O & U & R\end{array}
$$ If $T = 7$ and the letter $O$ represents an even number, what is the only possible value for $W?$