How to reduce as much as possible space taken by questions of an exam while avoiding questions that spill over multiple pages?

Question

I have a set of rules for the questions of an exam I'm trying to design. I want to find a way to respect all the following rules:

_ if two or more questions can fit inside the same page, make it happen.

_ if one question spills over another page but that one or more questions may fit at the end of the last page of that first question,make it fit.

_ if one question doesn't fit normally on a single page, you don't have to make it fit on only one page, it's okay to have questions that are very long and spill over multiple pages.

Is there an environment that fits my criterias?

edit: one more rule:

_ if n questions fits inside a single page, but if you put the n+1th inside the same page and it spill over another page. Then make the n+1th be on the next page.

Answer 1

Following the suggestions of @ChristianHupfer in his comments. I have used tcolorbox as follows to meet your rule numbers 1 and 3.

I think that, according to your rules, the following should be true.

• The red question should be on the top of page 1
• The green question should also be on page 1
• The blue question should be totally on page 2 (not starting at the bottom of page 1)

Can you verify?

\documentclass{article}
\usepackage{lipsum}
\usepackage[breakable]{tcolorbox}
\begin{document}
\pagestyle{empty}

\begin{tcolorbox}[breakable,colback=red!25!white] \lipsum[1] \end{tcolorbox}

\begin{tcolorbox}[breakable,colback=blue!25!white] \lipsum[2-5] \end{tcolorbox}

\begin{tcolorbox}[breakable,colback=green!25!white] \lipsum[6] \end{tcolorbox}

\end{document}