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This uses an embedded Geogebra graph of a polar function with random coefficients set by NUMBAS.

Should not be used: this relies on a custom JavaScript which is not guaranteed to continue working.

Wrap the student's answer in set() so it's marked as a set.

In parts (a) and (b) rearrange linear inequalities to make $x$ the subject.

In the parts (c) and (d) correctly give the direction of the inequality sign after rearranging an inequality.

Given a generating matrix for a linear code, give a parity check matrix

Given a generating matrix for a binary linear code, construct a parity check matrix, list all the codewords, list all the words in a given coset, give coset leaders, calculate syndromes for each coset, correct a codeword with one error.

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Made for my TALMO talk. This demonstrates how you can use a part with no marks as an oracle to perform calculations, to help the student check their working.

This is out of date. There is a new "getting statrted" exam at https://numbas.mathcentre.ac.uk/exam/21108/getting-started/

6 questions which introduce the user to the Numbas system.

Draws a triangle based on 3 side lengths.
NOT ACCESSIBLE

A sample question

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A couple of different ways of showing the correct answer to a single part as soon as the student submits an answer. One way allows the student to change their answer, while the other locks the part.

A third part includes a "reveal answers to this part" button, which allows the student to choose to reveal the answer to the part.

Think very carefully before using this: by revealing the answer, you are removing the opportunity for the student to later on realise they've got that step wrong, as a consequence of some further work. It's often possible to use adaptive marking to use the student's answer in place of the correct answer in later parts.

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GCSE Fraction Questions 

Obosolete: there's now a built-in function sort_by.

Defines a custom function sort_by to sort a list of lists by the elements at the given index.

You could do a similar thing to sort lists of dictionaries.

You can use LaTeX in marking comments, but remember to escape backslashes!

Should not be used: there's now a built-in function frequencies.

This question randomly generates a list of 100 items, each chosen from a list of strings.

It then computes the number of occurrences of each distinct item in the list. The statement shows the frequencies in a table.

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This question shows how to load a GeoGebra applet from geogebra.org.

This exam uses a custom theme to provide no feedback about scores to the student.

The idea is to provide a version of the test compiled with this theme to the students as they attempt it. Once the test has closed, update with a version of the same test compiled with the default theme, so students can go back in and get feedback.

Demo question showing how to use the matrix maths functions in JavaScript.

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Call a custom function from another javascript custom function by using scope.evaluate

Get the student to upload their experimental data in a CSV file, then ask them to compute statistics on it.

Defines a CSS class in the preamble which styles the "Lemma" environment, used in the statement.

A couple of different ways of asking the student to enter a large number, to get around the floating point imprecision problem.

Student is asked whether a quadratic equation can be factorised. If they say "yes", they're asked to give the factorisation.