\documentclass{article}

\usepackage{pdfpages}

\begin{document}

        \includepdf[pages={1-1}, delta=0 10]{Carta/letter.pdf}
        \includepdf[pages={1-3}, delta=0 10]{CV/CV.pdf}
        \includepdf[pages={1-1}, delta=0 10]{Examen1/examen.pdf}
        \includepdf[pages={1-2}, delta=0 10]{Examen2/Tema1A.pdf}

\end{document}
