Latex replacing “Page 118” with “P1ge 118”

Question

I am getting this very strange error in Latex using enumerate. My code is as follows:

\documentclass{article}
\usepackage{amsmath}
\usepackage{amssymb}
\usepackage[margin=.75 in]{geometry}
\usepackage{enumerate}

\begin{document}
\fbox{
\parbox{6.66 in}{
{\bf MATH 342 \hfill Name}

\emph{Problem Set \# 9 \hfill 25 January 2013}}}
\vspace{.1 in}

\begin {enumerate}[{\bf \ \ \ \ Page 71:}]
    \item \ \ \
    \begin{enumerate}
        \item[37.]
        \begin{enumerate}
            \item[d.] 
        \end{enumerate}
        \item[80.]
    \end{enumerate}
\end{enumerate}


\begin {enumerate}[{\bf \ \ \ \ Page 118:}]
    \item \ \ \
    \begin{enumerate}
        \item[26.]
        \item[27.]
        \item[65.] 
    \end{enumerate}
\end{enumerate}


\begin {enumerate}[{\bf \ \ \ \ Page 138:}]
    \item \ \ \
    \begin{enumerate}
        \item[3.]
        \item[10.]
        \item[42.]
    \end{enumerate}
\end{enumerate}


\end{document}

This outputs everything as expected except "Page 118" is "P1ge 118" and "Page 138" is "P1ge 138"

I am using TeXworks with MikTex if this makes any difference.

Anybody know whats going on/how to fix it?

Thanks

Answer 1

I suggest to use the enumitem package. This way you don't have to "eye compute" spacings:

\documentclass{article}
\usepackage{amsmath}
\usepackage{amssymb}
\usepackage[margin=.75in]{geometry}
\usepackage{calc}
\usepackage{enumitem}

%%% \referpage is used for the label; in order to get a good alignment,
%%% the page number sticks out to the right
\DeclareRobustCommand{\referpage}[1]{\textbf{Page \makebox[0pt][l]{#1:}}}

\begin{document}
\noindent\fbox{% The heading box is computed more accurately
\parbox{\textwidth-2\fboxsep-2\fboxrule}{
  {\bfseries MATH 342 \hfill Name}

  \emph{Problem Set \# 9 \hfill 25 January 2013}}%
}

\vspace{.1 in}

\begin{enumerate}[leftmargin=*,label=\referpage{71}]
    \item \mbox{}
    \begin{enumerate}
        \item[37.]
        \begin{enumerate}
            \item[d.] 
        \end{enumerate}
        \item[80.]
    \end{enumerate}
\end{enumerate}

\begin{enumerate}[leftmargin=*,label=\referpage{118}]
    \item \mbox{}
    \begin{enumerate}
        \item[26.]
        \item[27.]
        \item[65.] 
    \end{enumerate}
\end{enumerate}

\begin{enumerate}[leftmargin=*,label=\referpage{138}]
    \item \mbox{}
    \begin{enumerate}
        \item[3.]
        \item[10.]
        \item[42.]
    \end{enumerate}
\end{enumerate}


\end{document}

Answer 2

From the documentation of enumerate:

An occurence of one of the tokens A a I i or 1 produces the value of the counter printed with (respectively) \Alph \alph \Roman \roman or \arabic. These letters may be surrounded by any strings involving any other TEX expressions, however the tokens A a I i 1 must be inside a { } group if they are not to be taken as special.

So surrounding the a with {} should fix your issue:

\begin {enumerate}[{\bf \ \ \ \ {Page} 71:}]