Linear algebra/Determinant quiz

<quiz display=simple> { |type="{}"} The determinant of $\left[\begin{array}{cc}3& 4\\ 2& 1\end{array}\right]$ is { -5 _3 }.

{ |type="{}"} The determinant of $\left[\begin{array}{cc}0& -2\\ 6& 2\end{array}\right]$ is { 12 _3 }.

{ |type="{}"} The determinant of $\left[\begin{array}{ccc}3& -2& -1\\ 1& 1& -2\\ 8& -5& 3\end{array}\right]$ is { 30 _3 }.

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