\documentclass{report}
\usepackage{amsmath}
\newcommand{\Mod}[1]{\ (\mathrm{mod}\ #1)}

\begin{document}

My student number is \textbf{307585} \\ 
My student number mod 8 is equal to: 
\[ 307585 \mod 8 \]
My topic is topic number \textbf{1} \\ 
Topic number 1 is \textbf{Filling Algorithms} \\
My topic is \textbf{Filling Algorithms} 

\end{document}