How to make an empty box
You can use \framebox(200,300){}
where the size is given in multiples of \unitlength
, defaulting to 1pt
.
Surprised no one has mentioned this. Latex has feature specifically for questions and answers:
% allow for answer boxes:
\documentclass[12pt]{exam}
\printanswers
\usepackage{amsmath}
\begin{document}
\begin{enumerate}
% questions can be list items
\item (Problem 7 \S 2.1)\\
Evaluate the following expression using Euclid's algorithm (2.1.3). (\textbf{Write each step down for credit})
\[\gcd(98,\ 35)\]
% make an answer box
\begin{solutionorbox}[2in] \\
$98\mod 35 = 28$ \\
$35\mod 28 = 7$ \\
$28\mod 7 = 0$ \\
$\gcd(98,\ 35) = 7$
\end{solutionorbox}
\end{enumerate}
\end{document}
To add, if you need space for students to work on this printed out, you can use vspace.
% answer box with space
\begin{solutionorbox}
\vspace{10cm}
\end{solutionorbox}
To make empty boxes that align nicely with the text, you can combine \fbox with \phantom in this way:
\fbox{\phantom{This is my answer}}
You set the width and height by the width and height of the text in \phantom. The resulting box will align perfectly with a line of text, contrarily to the box created with \framebox .