Matrix questions can be created like this:

In preview mode, the results will be incorrect like this:

Or correctly as:

Matrices can be used via the Matrices keypad

or can be entered as Latex, such as:

\begin{matrix}1&2&3\\4&5&6\\7&8&9\end{matrix}.

Or typed in the symbolic full keypad like this:

Click outside the popup window to hide it.

Then you can click in the grey boxes to fill in the numbers:

and use the device keyboard *tab* and *arrows* to navigate:

**Determinants:**

We will illustrate the advanced capabilities of the evaluation engine with the Determinant function.

Determinants can be created in the Matrices keypad or in LaTex as:

\begin{vmatrix}1&2\\3&4\end{vmatrix}

Just a reminder that you can use LaTex, so instead of using the keypads, you can also can copy and paste this LaTex into the entry box and it will be interpreted.

If this is the expected answer, and the student enters -2 then this will be graded correctly.

If you require the student to enter a precise matrix and not an equivalent form, then use "Literal" evaluation mode.

You can also create Template (Cloze) or Complete the equation types of matrix questions as explained here.

**Invalid Entries:**

Consider the case of an entry as follows:

This is a matrix and a multiplication symbol, and is an incomplete expression. If you truly intend the students to enter something like this, then use Literal evaluation mode (there is no checking of valid mathematical forms or equivalences in literal mode).

Here is an invalid matrix equation. Even if the student entry matches this exactly, the result will be incorrect as the entry is invalid.

Another type of Matrix Question

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