9. Merryn wrote down the numbers $2,0,2,3$ and one further number. What was the median of her five numbers?
A 0
B 2
C 2.5
D 3
E more information required
9. B Let the one further number be $x$. The table below shows possible values of $x$ and the corresponding list of Merryn's numbers, written in ascending order.
\begin{tabular}{c|c} 
Range of $x$ & Merryn's list \\
\hline$x \leq 0$ & $x, 0,2,2,3$ \\
$03$ & $0,2,2,3, x$
\end{tabular}

In each case, the middle of Merryn's numbers is 2. So, whatever the value of the one further number, the median of the numbers is 2 .