\documentclass[a4paper,12pt]{article}

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\usepackage{siunitx}

\usepackage[francais,bloc,insidebox]{automultiplechoice}
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\usepackage{siunitx}
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\usepackage{tabularx,tabularray,array}

%pour effacer le numéro
\def\EffacementNumeroQuestion{\def\AMCbeginQuestion##1##2{}\AMCquestionNumberfalse}
\begin{document}

\exemplaire{1}{

%%% debut de l'en-tête des copies :

\noindent{\bf QCM  \hfill TEST}

\vspace*{.5cm}
\begin{minipage}{.4\linewidth}
\centering\large\bf Test\\ Examen du 01/01/2008\end{minipage}
\champnom{\fbox{
                \begin{minipage}{.5\linewidth}
                  Nom et prénom :

                  \vspace*{.5cm}\namefielddots
                  \vspace*{1mm}
                \end{minipage}
         }}



\textbf{On étudie la force de gravitation qui s'exerce entre la Terre et la Lune. }

\noindent
\textbf{Données :} $G = \qty{6.67e-11}{\newton\meter\squared\kilogram}$ | $d=\qty{3,84e8}{\meter}$ | $M_T = \qty{5,98e24}{\kilogram}$ | $M_L = \qty{7,35e22}{\kilogram} $


\qty[evaluate-expression,%
 exponent-thresholds=20:28,%
 exponent-mode=scientific,%
round-mode=places,%
 round-precision=2,%
]{6.67e-11*5.98e24*7.35e22/(3.84e8)^2}{\newton}

\qty[evaluate-expression,%
 exponent-thresholds=20:28,%
 exponent-mode=scientific,%
round-mode=places,%
 round-precision=2,%
]{6.67e-11*5.98e24*7.35e22/(3.84e8)}{\newton}



\noindent
\begin{tabularx}{\linewidth}{@{}X@{}@{}c@{}@{}X@{}}

\begin{questionmultx}{A}
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approx=564,%
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}
\end{questionmultx}
&
\huge$\times$10\textrm{\^}
&
\EffacementNumeroQuestion

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}


\end{document}
