# Digit Sum, What's Z?

**Logic**Level 2

\[ \large{\begin{array}{ccccccc} && & & \color{blue}X& \color{blue}X & \color{blue}X&\color{blue}X\\ && & & \color{green}Y& \color{green}Y & \color{green}Y&\color{green}Y\\ +&& & & \color{red}Z& \color{red}Z & \color{red}Z&\color{red}Z\\ \hline & & & \color{green}Y& \color{blue}X& \color{blue}X & \color{blue}X&\color{red}Z\\ \hline \end{array}} \]

If \(\color{blue}X\), \( \color{green}Y\) and \(\color{red}Z\) are distinct digits in the sum above, then find \(\color{red}Z\).