Veja um exemplo do pacote acima (abaixo):
\documentclass[a4paper,11pt]{exam}
\printanswers % If you want to print answers
%\noprintanswers % If you don't want to print answers
\addpoints % if you want to count the points
%\noaddpoints % if you don't want to count the points
%Specifies the way question are displayed:
\qformat{\textbf{Question\thequestion}\quad(\thepoints)\hfill}
\usepackage{color} % defines a new color
\definecolor{SolutionColor}{rgb}{0.8,0.9,1} % light blue
\shadedsolutions % defines the style of the solution environment
%\framedsolutions % defines the style of the solution environment
%Defines the title of the solution environment:
\renewcommand{\solutiontitle}{\noindent\textbf{Solution:}\par\noindent}