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+\documentclass[12pt,a4paper,twocolumn,landscape]{exam}
+
+\usepackage{xparse}
+\usepackage{tikz}
+   \usetikzlibrary{arrows,calc,fit}
+\usepackage{mathtools}
+\usepackage{fullpage}
+\usepackage{todonotes}
+\usepackage{float}
+\usepackage[compact,explicit]{titlesec}% http://ctan.org/pkg/titlesec
+\usepackage[utf8]{inputenc}
+\usepackage{titling}
+\usepackage{pgfplots}
+\usepackage{wrapfig}
+\usepackage{boxedminipage}
+\usepackage{parskip} % Don't indent paragraphs
+
+\usepackage{fib}
+\usepackage{common}
+
+\newcommand{\slice}[4]{
+  \pgfmathparse{0.5*#1+0.5*#2}
+  \let\midangle\pgfmathresult
+
+  % slice
+  \draw[thick,fill=black!10] (0,0) -- (#1:1) arc (#1:#2:1) -- cycle;
+
+  % outer label
+  \node[label=\midangle:#4] at (\midangle:1) {};
+
+  % inner label
+  \pgfmathparse{min((#2-#1-10)/110*(-0.3),0)}
+  \let\temp\pgfmathresult
+  \pgfmathparse{max(\temp,-0.5) + 0.8}
+  \let\innerpos\pgfmathresult
+  \node at (\midangle:\innerpos) {#3};
+}
+
+\pagestyle{headandfoot}
+
+\firstpageheadrule
+\firstpageheader{Ratios}
+                {Level 5-6}
+                {\today}
+
+\runningheadrule
+\runningheader{Ratios}
+              {Ratios, Page \thepage\ of \numpages}
+              {\today}
+
+\firstpagefooter{}{}{}
+\runningfooter{}{}{}
+
+\begin{document}
+\section*{Data Processing - Level 5-6}
+
+\begin{wrapfigure}{R}{0.25\linewidth}
+    \centering
+    \begin{boxedminipage}{\linewidth}
+        Keywords:
+        \begin{itemize}
+            \item Chart
+            \item Graph
+            \item Data
+            \item Stem
+        \end{itemize}
+    \end{boxedminipage}
+\end{wrapfigure}
+
+Data can be represented in many ways, one useful way is to represent it as a
+graph or chart.
+
+\subsection*{Stem and Leaf Diagrams}
+
+Stem and leaf diagrams are useful for displaying small to medium amounts of
+numerical data.
+
+For example, in the stem and leaf diagram below, you can see some test
+results. By looking at the length of the row of numbers, you can tell how many
+results fall in to each range.
+
+A very important part of the stem and leaf diagram is the key, this tells you
+how to interpret the data in the diagram.
+
+\begin{table}[htbp]
+    \centering
+    \caption{Stem Plot of test results Key: $1 | 1= 11$}
+    \begin{tabular}{r|*{9}{l}}
+        Stem & \multicolumn{9}{l}{Leaf} \\
+        \hline
+        1 & 1 &   &   &   &   &   &   &   &   \\
+        2 & 0 & 3 &   &   &   &   &   &   &   \\
+        3 & 5 & 6 & 6 & 6 & 7 & 7 & 7 & 8 & 9 \\
+        4 & 5 & 7 & 7 & 8 &   &   &   &   &   \\
+    \end{tabular}
+    \label{tab:addlabel}
+\end{table}
+
+\subsection*{Bar Charts}
+
+Bar charts are another way of representing data, here the chart below
+represents the number of different colour cars that passed a point on a road
+over a hour.
+
+\begin{figure}[H]
+    \centering
+    \begin{tikzpicture}
+        \begin{axis}[
+            symbolic x coords={Red, Green, Blue},
+            xtick=data
+          ]
+            \addplot[ybar,fill=black!10] coordinates {
+                (Red,   42)
+                (Green,  50)
+                (Blue,   80)
+            };
+        \end{axis}
+    \end{tikzpicture}
+\end{figure}
+
+\subsection*{Pie Charts}
+
+\begin{figure}[H]
+    \centering
+    \begin{tikzpicture}[scale=3]
+        \newcounter{a}
+        \newcounter{b}
+        \foreach \p/\t in {20/type A, 4/type B, 11/type C,
+        49/type D, 16/other}
+        {
+            \setcounter{a}{\value{b}}
+            \addtocounter{b}{\p}
+            \slice{\thea/100*360}
+            {\theb/100*360}
+            {\p\%}{\t}
+        }
+    \end{tikzpicture}
+\end{figure}
+
+\subsection*{Questions}
+
+TODO
+
+\end{document}