\documentclass[a4paper, landscape, twocolumn, 10pt]{article}
\usepackage{myXsim}

\author{Benjamin Bertrand}
\title{Multiplication nombre relatif - Exercices}
\date{2021-09-13}

\DeclareExerciseCollection[step=2]{banque}
\xsimsetup{collect}

\thispagestyle{empty}


\begin{document}

\input{exercises.tex}

\foreach \n in {0,...,3}{%
    \printcollection{banque}
    \vfill
}

\end{document}