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

Use the accents package. You can do more fun stuff with TeX primitives, but here's the easy and most flexible way:

\documentclass{article}
\usepackage{accents}
\newcommand{\qleq}{\accentset{?}{\leq}}
\begin{document}
Test: $a \qleq b$.
\end{document}