Question: Dynamically setting size in matrix questions

Dear All,

I'm creating matrix questions and wish to dynamically set the size of the matrix. So I'm trying something like this:

\qutext{Find the transpose of the matrix $$A=\left[\begin{array}{ccc} 1 & 2 & 3\\ 0 & 1 & -2\end{array}\right]$$}

\code{$a=3;}

\size{$a}{2}
 

<snip>

But this doesn't seem to work.

 Thanks

 Colin

 

 

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