How do I put a question mark above \leq?

Question

How can I put a question mark above a less-than-or-equal-to symbol(\\leq) in LaTeX?

Answer 1

You can use stackrel:

\begin{equation}
  2 \stackrel{?}{\le} 3
\end{equation}
\end{document}

Or, if you use the amsmath package, you can use overset as follows:

\documentclass{article}
\usepackage{amsmath}
\begin{document}
\begin{equation}
  2 \overset{?}{\le} 3
\end{equation}
\end{document}