只是为了在@Zarko 的评论中添加 MWE:
\documentclass{article}
\usepackage{mwe}
\setcounter{figure}{8} %<---- If you want to start with number 'n', then put 'n-1' here.
\begin{document}
\begin{figure}
\includegraphics{example-image-a}
\caption{Look at this brilliant figure!}
\end{figure}
\end{document}