\documentclass[
addpoints,
]{exam}

\usepackage{lipsum,graphbox,mdframed,array,ragged2e,booktabs,fmtcount,multicol,multirow,tabularx}
\usepackage[table]{xcolor}
\usepackage[export]{adjustbox}

\newcolumntype{L}[1]{>{\RaggedRight\hspace{0pt}}m{#1}}
\newcolumntype{R}[1]{>{\RaggedLeft\hspace{0pt}}m{#1}}
\newcolumntype{C}[1]{>{\Centering\hspace{0pt}}m{#1}}

\pagestyle{headandfoot}

\extraheadheight{10cm}

\firstpageheader%
{}%
{%
	\renewcommand{\arraystretch}{2}
	\setlength{\tabcolsep}{0em}
	\begin{tabularx}{\textwidth}{L{0.333\textwidth}C{0.334\textwidth}R{0.333\textwidth}}
		\hline
		{text} & \includegraphics[align=c,scale=0.25]{example-image} & {text}\\
		\hline
		\multicolumn{3}{c}{\cellcolor{gray!20}some long text}\\
		\hline
		\multicolumn{3}{c}{
			\begin{tabularx}{\textwidth}{L{0.5\textwidth}R{0.5\textwidth}}
				TEXT  & TEXT
			\end{tabularx}
		}\\
		\hline
	\end{tabularx}
}%
{}


\begin{document}
	\setlength{\parindent}{0cm}
	\begin{questions}
		\question some question
		\question some question
	\end{questions}
\end{document}