\documentclass{article}
\usepackage{multicol}
\usepackage[insidebox,noshuffle,postcorrect]{automultiplechoice}
\usepackage{fontspec}
\usepackage{tikz}
\setmainfont{Linux Libertine O}
\geometry{paper=letterpaper}
\begin{document}
\AMCformHSpace=3em
\AMCboxDimensions{shape=oval}

\def\NivelCode{ %
{\def\AMCbeginQuestion##1##2{}%
\AMCnobloc\setlength{\parindent}{0pt}%
\def\AMCbeginAnswer{\hspace{0pt}\vbox\bgroup}%
\def\AMCendAnswer{\vspace{-\AMCcodeVspace}\egroup}%
\def\AMCanswer##1##2{\hbox{##1 ##2}\vspace{\AMCcodeVspace}}%
\begin{question}{nivel}\QuestionIndicative%
\begin{choicescustom}[o]\scoring{auto=1}%
\wrongchoice[\phantom{7}]{7}
\wrongchoice[\phantom{8}]{8}
\wrongchoice[\phantom{I}]{I}
\wrongchoice[\phantom{II}]{II}
\wrongchoice[\phantom{III}]{III}
\wrongchoice[\phantom{IV}]{IV}
\end{choicescustom}%
\end{question}}%
}

\def\AsignaturaCode{ %
{\def\AMCbeginQuestion##1##2{}%
\AMCnobloc\setlength{\parindent}{0pt}%
\def\AMCbeginAnswer{\hspace{0pt}\vbox\bgroup}%
\def\AMCendAnswer{\vspace{-\AMCcodeVspace}\egroup}%
\def\AMCanswer##1##2{\hbox{##1 ##2}\vspace{\AMCcodeVspace}}%
\begin{question}{asignatura}\QuestionIndicative%
\begin{choicescustom}[o]\scoring{auto=1}%
\wrongchoice[\phantom{L}]{Len}
\wrongchoice[\phantom{M}]{Mat}
\wrongchoice[\phantom{H}]{His}
\wrongchoice[\phantom{B}]{Bio}
\wrongchoice[\phantom{F}]{Fis}
\wrongchoice[\phantom{Q}]{Qui}
\wrongchoice[\phantom{I}]{Ing}
\wrongchoice[\phantom{R}]{Rel}
\end{choicescustom}%
\end{question}}%
}

\def\AMCbeginQuestion#1#2{\vspace{2ex}\par\noindent\hbox to 3em{\hspace*{\fill}\bf #1 \hspace*{1em}}}
\def\AMCanswer#1#2{#1\hspace{.5em}}
\AMCboxColor{gray}
\onecopy{5}{    

\begin{center}\bf\large Hoja de Respuestas\end{center}
\noindent
\begin{tabular}{|l|l|l|}
\hline
RUT & Nivel & Asignatura\\
\hline
 \vspace{-0.25cm}
 & &\\
\AMCcode{StudentNum}{8}&
\NivelCode &
\AsignaturaCode
\\
\hline
\end{tabular}
\hfill\namefield{\fbox{    
    \begin{minipage}{.25\linewidth}
      Nombre y apellido:
      
      \vspace*{.5cm}\dotfill
      
      \vspace*{.5cm}\dotfill
      \vspace*{1mm}
    \end{minipage}
  }}\hfill


\vspace{.5cm}
\noindent\hrulefill

\begin{multicols}{3}\columnseprule=.4pt

\begin{question}{01}
\begin{choicescustom}
\wrongchoice{}%
\wrongchoice{}%
\wrongchoice{}%
\wrongchoice{}%
\wrongchoice{}%
\end{choicescustom}
\end{question}

\begin{question}{02}
\begin{choicescustom}
\wrongchoice{}%
\wrongchoice{}%
\wrongchoice{}%
\wrongchoice{}%
\wrongchoice{}%
\end{choicescustom}
\end{question}

\begin{question}{03}
\begin{choicescustom}
\wrongchoice{}%
\wrongchoice{}%
\wrongchoice{}%
\wrongchoice{}%
\wrongchoice{}%
\end{choicescustom}
\end{question}

\begin{question}{04}
\begin{choicescustom}
\wrongchoice{}%
\wrongchoice{}%
\wrongchoice{}%
\wrongchoice{}%
\wrongchoice{}%
\end{choicescustom}
\end{question}

\begin{question}{05}
\begin{choicescustom}
\wrongchoice{}%
\wrongchoice{}%
\wrongchoice{}%
\wrongchoice{}%
\wrongchoice{}%
\end{choicescustom}
\end{question}

\begin{question}{06}
\begin{choicescustom}
\wrongchoice{}%
\wrongchoice{}%
\wrongchoice{}%
\wrongchoice{}%
\wrongchoice{}%
\end{choicescustom}
\end{question}

\begin{question}{07}
\begin{choicescustom}
\wrongchoice{}%
\wrongchoice{}%
\wrongchoice{}%
\wrongchoice{}%
\wrongchoice{}%
\end{choicescustom}
\end{question}

\begin{question}{08}
\begin{choicescustom}
\wrongchoice{}%
\wrongchoice{}%
\wrongchoice{}%
\wrongchoice{}%
\wrongchoice{}%
\end{choicescustom}
\end{question}

\begin{question}{09}
\begin{choicescustom}
\wrongchoice{}%
\wrongchoice{}%
\wrongchoice{}%
\wrongchoice{}%
\wrongchoice{}%
\end{choicescustom}
\end{question}

\begin{question}{10}
\begin{choicescustom}
\wrongchoice{}%
\wrongchoice{}%
\wrongchoice{}%
\wrongchoice{}%
\wrongchoice{}%
\end{choicescustom}
\end{question}

\begin{question}{11}
\begin{choicescustom}
\wrongchoice{}%
\wrongchoice{}%
\wrongchoice{}%
\wrongchoice{}%
\wrongchoice{}%
\end{choicescustom}
\end{question}

\begin{question}{12}
\begin{choicescustom}
\wrongchoice{}%
\wrongchoice{}%
\wrongchoice{}%
\wrongchoice{}%
\wrongchoice{}%
\end{choicescustom}
\end{question}

\begin{question}{13}
\begin{choicescustom}
\wrongchoice{}%
\wrongchoice{}%
\wrongchoice{}%
\wrongchoice{}%
\wrongchoice{}%
\end{choicescustom}
\end{question}

\begin{question}{14}
\begin{choicescustom}
\wrongchoice{}%
\wrongchoice{}%
\wrongchoice{}%
\wrongchoice{}%
\wrongchoice{}%
\end{choicescustom}
\end{question}

\begin{question}{15}
\begin{choicescustom}
\wrongchoice{}%
\wrongchoice{}%
\wrongchoice{}%
\wrongchoice{}%
\wrongchoice{}%
\end{choicescustom}
\end{question}

\begin{question}{16}
\begin{choicescustom}
\wrongchoice{}%
\wrongchoice{}%
\wrongchoice{}%
\wrongchoice{}%
\wrongchoice{}%
\end{choicescustom}
\end{question}

\begin{question}{17}
\begin{choicescustom}
\wrongchoice{}%
\wrongchoice{}%
\wrongchoice{}%
\wrongchoice{}%
\wrongchoice{}%
\end{choicescustom}
\end{question}

\begin{question}{18}
\begin{choicescustom}
\wrongchoice{}%
\wrongchoice{}%
\wrongchoice{}%
\wrongchoice{}%
\wrongchoice{}%
\end{choicescustom}
\end{question}

\begin{question}{19}
\begin{choicescustom}
\wrongchoice{}%
\wrongchoice{}%
\wrongchoice{}%
\wrongchoice{}%
\wrongchoice{}%
\end{choicescustom}
\end{question}

\begin{question}{20}
\begin{choicescustom}
\wrongchoice{}%
\wrongchoice{}%
\wrongchoice{}%
\wrongchoice{}%
\wrongchoice{}%
\end{choicescustom}
\end{question}

\begin{question}{21}
\begin{choicescustom}
\wrongchoice{}%
\wrongchoice{}%
\wrongchoice{}%
\wrongchoice{}%
\wrongchoice{}%
\end{choicescustom}
\end{question}

\begin{question}{22}
\begin{choicescustom}
\wrongchoice{}%
\wrongchoice{}%
\wrongchoice{}%
\wrongchoice{}%
\wrongchoice{}%
\end{choicescustom}
\end{question}

\begin{question}{23}
\begin{choicescustom}
\wrongchoice{}%
\wrongchoice{}%
\wrongchoice{}%
\wrongchoice{}%
\wrongchoice{}%
\end{choicescustom}
\end{question}

\begin{question}{24}
\begin{choicescustom}
\wrongchoice{}%
\wrongchoice{}%
\wrongchoice{}%
\wrongchoice{}%
\wrongchoice{}%
\end{choicescustom}
\end{question}

\begin{question}{25}
\begin{choicescustom}
\wrongchoice{}%
\wrongchoice{}%
\wrongchoice{}%
\wrongchoice{}%
\wrongchoice{}%
\end{choicescustom}
\end{question}

\begin{question}{26}
\begin{choicescustom}
\wrongchoice{}%
\wrongchoice{}%
\wrongchoice{}%
\wrongchoice{}%
\wrongchoice{}%
\end{choicescustom}
\end{question}

\begin{question}{27}
\begin{choicescustom}
\wrongchoice{}%
\wrongchoice{}%
\wrongchoice{}%
\wrongchoice{}%
\wrongchoice{}%
\end{choicescustom}
\end{question}

\begin{question}{28}
\begin{choicescustom}
\wrongchoice{}%
\wrongchoice{}%
\wrongchoice{}%
\wrongchoice{}%
\wrongchoice{}%
\end{choicescustom}
\end{question}

\begin{question}{29}
\begin{choicescustom}
\wrongchoice{}%
\wrongchoice{}%
\wrongchoice{}%
\wrongchoice{}%
\wrongchoice{}%
\end{choicescustom}
\end{question}

\begin{question}{30}
\begin{choicescustom}
\wrongchoice{}%
\wrongchoice{}%
\wrongchoice{}%
\wrongchoice{}%
\wrongchoice{}%
\end{choicescustom}
\end{question}

\begin{question}{31}
\begin{choicescustom}
\wrongchoice{}%
\wrongchoice{}%
\wrongchoice{}%
\wrongchoice{}%
\wrongchoice{}%
\end{choicescustom}
\end{question}

\begin{question}{32}
\begin{choicescustom}
\wrongchoice{}%
\wrongchoice{}%
\wrongchoice{}%
\wrongchoice{}%
\wrongchoice{}%
\end{choicescustom}
\end{question}

\begin{question}{33}
\begin{choicescustom}
\wrongchoice{}%
\wrongchoice{}%
\wrongchoice{}%
\wrongchoice{}%
\wrongchoice{}%
\end{choicescustom}
\end{question}

\begin{question}{34}
\begin{choicescustom}
\wrongchoice{}%
\wrongchoice{}%
\wrongchoice{}%
\wrongchoice{}%
\wrongchoice{}%
\end{choicescustom}
\end{question}

\begin{question}{35}
\begin{choicescustom}
\wrongchoice{}%
\wrongchoice{}%
\wrongchoice{}%
\wrongchoice{}%
\wrongchoice{}%
\end{choicescustom}
\end{question}

\begin{question}{36}
\begin{choicescustom}
\wrongchoice{}%
\wrongchoice{}%
\wrongchoice{}%
\wrongchoice{}%
\wrongchoice{}%
\end{choicescustom}
\end{question}

\begin{question}{37}
\begin{choicescustom}
\wrongchoice{}%
\wrongchoice{}%
\wrongchoice{}%
\wrongchoice{}%
\wrongchoice{}%
\end{choicescustom}
\end{question}

\begin{question}{38}
\begin{choicescustom}
\wrongchoice{}%
\wrongchoice{}%
\wrongchoice{}%
\wrongchoice{}%
\wrongchoice{}%
\end{choicescustom}
\end{question}

\begin{question}{39}
\begin{choicescustom}
\wrongchoice{}%
\wrongchoice{}%
\wrongchoice{}%
\wrongchoice{}%
\wrongchoice{}%
\end{choicescustom}
\end{question}

\begin{question}{40}
\begin{choicescustom}
\wrongchoice{}%
\wrongchoice{}%
\wrongchoice{}%
\wrongchoice{}%
\wrongchoice{}%
\end{choicescustom}
\end{question}
% continue here to get as many questions as needed...

\end{multicols}  

}   

\end{document}

