\documentclass[a4paper,english]{article}
\usepackage{ifxetex}
\usepackage{ifluatex}

\ifluatex
        \usepackage{luatextra}
        \usepackage{unicode-math}
        \setmathfont{Latin Modern Math}
        \usepackage[utf8]{luainputenc}
\else\ifxetex
        \usepackage{fixltx2e}
                \usepackage{fontspec}
                \usepackage{unicode-math}
                      \XeTeXinputencoding utf8
\else
        \usepackage[T1]{fontenc}
        \usepackage[utf8]{inputenc}
        \usepackage{lmodern,textcomp}
\fi\fi
\usepackage[shufflerandom,xyz,solutions,noquizsolutions,twocolumns]{esami}
\def\examname{Geometry Final}
\def\numcompiti{4}
\date{12/12/2017}
\def\Data{\longdate}
\usepackage{babel}

\begin{document}
\testversioni
\pagestyle{esame}
\whiledo{\thevers<\numcompiti}{\stepvers
\FPeval\seme{round((\thenomefile+(3*\thevers)):0)}
\randomi=\seme
\permuta
\testa
\begin{test}[0]
\begin{questions}
\selectallproblems[random]{test11}
\end{questions}
\end{test}
\closevers
\newpage
\setcounter{page}{1}
}

\end{document}