\documentclass[11pt,fleqn]{article}

%% This first part is the document header, which you don't need to edit.
%% Scroll down to \begin{document} 

\usepackage[latin1]{inputenc}
\usepackage{enumerate}
\usepackage[hang,flushmargin]{footmisc}
\usepackage{amsmath}
\usepackage{amsfonts}
\usepackage{amssymb}
\usepackage{amsthm}

\theoremstyle{definition}
\newtheorem{theorem}{Theorem}[section]
\newtheorem{lemma}[theorem]{Lemma}
\newtheorem{corollary}[theorem]{Corollary}
\newtheorem{proposition}[theorem]{Proposition}
\newtheorem{definition}[theorem]{Definition}
\newtheorem{example}[theorem]{Example}

\setlength{\oddsidemargin}{0px}
\setlength{\textwidth}{460px}
\setlength{\voffset}{-1.5cm}
\setlength{\textheight}{20cm}
\setlength{\parindent}{0px}
\setlength{\parskip}{10pt}

\begin{document}
\begin{center}
{\Huge
Document title % e.g. Problem sheet 1
}\\
Name, date % e.g. Clive Newstead, Saturday 27th June 2015
\end{center}

%%%%%%%%%%%%%%%%%%%%%%%%%%%%
%% Your work starts here! %%
%%%%%%%%%%%%%%%%%%%%%%%%%%%%

\begin{enumerate}[Q1.]
\item
% Answer to Q1 goes here

\item 
% Answer to Q2 goes here

% ...and so on; type \item to start the next question
\end{enumerate}

\end{document}