\documentclass[a4paper]{article}
\usepackage{pdfpages}
\pagestyle{empty}
\includepdfset{nup=2,
landscape=true,
frame=true,
offset=0cm 0cm,
delta=0cm 0cm}
\begin{document}
\includepdf[pages=-, scale=1.0]{CHAP3.pdf}
\end{document}

