How to make a serie of exercises in two columns

For making a two-column document, we need to add an option in the document class in the input file :
\documentclass[a4paper,10pt,twocolumn]{arabart}

for exemple, the following code show how it looks like when the content is just blind text using the blindtext package:

\documentclass[10pt,a4paper,twocolumn]{arabart}
\usepackage[utf8]{inputenc}
 \usepackage[LAE]{fontenc}
 \usepackage[arabic]{babel}
 \usepackage{blindtext} %%blind text package%%%%

 \begin{document}
 \blindtext
 \blindtext
 \blindtext 
\blindtext
 \blindtext
 \end{document}

And for result:

You can see it from write latex also :

Finally, we propose a typical serie in two column in write latex: