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% !TeX encoding = UTF-8
% !TeX spellcheck = en_US
% !TEX TS-program = lualatex
\documentclass{article}
\usepackage[nostamp]{moodle}
\ifPDFTeX % FOR LATEX and PDFLATEX
	\usepackage[utf8]{inputenc} % necessary
	\usepackage[T1]{fontenc} % necessary
\else % assuming XELATEX or LUALATEX
	\usepackage{fontspec}
\fi
\usepackage{hyperref,luacode}
\begin{document}

\section*{Introduction}

This document is intended to check the possibility of generating 
pseudo-calculated questions with the help of Lua scripts.

Inspired by
\url{https://github.com/avohns/python-latex-moodle-quiz/blob/master/simple-examples-eng/example1_arithmetic.tex}

\begin{quiz}[tags={calculated}]{Example Quiz}
% THIS DOES NOT REQUIRE LUACODE AND WORKS WITH RECENT LUATEX (2020)
%\directlua{
%function clozenum_print(pair,op,result)
%  tex.print("\\begin{numerical}$"..pair[1].." "..op.." "..pair[2].." 
%  =$".."\\item ",result,"\\end{numerical}")
%end
%function cloze_print(pair,points)
%  tex.print("\\begin{cloze}[points="..points.."]{Arithmetic Quiz 
%  ("..pair[1]..", "..pair[2]..")}Solve the following tasks!\\\\")
%  clozenum_print(pair,"+",pair[1]+pair[2])
%  clozenum_print(pair,"-",pair[1]-pair[2])
%  clozenum_print(pair,"*",pair[1]*pair[2])
%  if pair[1]/pair[2]==math.floor(pair[1]/pair[2]) then
%    clozenum_print(pair,":",math.floor(pair[1]/pair[2]))
%  end
%  tex.print("\\end{cloze}")
%end
%for x = 2,4 do
%  for y = 2,4 do
%    if x>y then
%      if x/y==math.floor(x/y) then points=4 else points=3 end
%      cloze_print({x,y},points)
%    end
%  end
%end
%}
% THIS SEEMS TO WORK BETTER WITH EARLIER VERSIONS OF LUATEX
\begin{luacode*}
function clozenum_print(pair,op,result)
  tex.print([[\begin{numerical}$]]..pair[1].." "..op.." "..pair[2]..
  " = $"..[[\item ]],result,[[\end{numerical}]])
end
function cloze_print(pair,points)
  tex.print([[\begin{cloze}[points=]]..points.."]{Arithmetic Quiz ("..
  pair[1]..", "..pair[2]..[[)}Solve the following tasks!\\]])
  clozenum_print(pair,"+",pair[1]+pair[2])
  clozenum_print(pair,"-",pair[1]-pair[2])
  clozenum_print(pair,"*",pair[1]*pair[2])
  if pair[1]/pair[2]==math.floor(pair[1]/pair[2]) then
    clozenum_print(pair,":",math.floor(pair[1]/pair[2]))
  end
  tex.print([[\end{cloze}]])
end
for x = 2,4 do
  for y = 2,4 do
    if x>y then
      if x/y==math.floor(x/y) then points=4 else points=3 end
      cloze_print({x,y},points)
    end
  end
end
\end{luacode*}
\end{quiz}
\end{document}