Christian Lawson-Perfect

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.

This question uses the vis.js library to plot 3D functions and data sets.

As well as JME functions to make plots, you can use javascript functions to get more control over how the plots are rendered.

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

A diagram showing the difference between lines, rays and segments in Eukleides.

Give the student a larger area to write some free-form text, which isn't marked.

Shows how to use the JME function lpad to add zeros to the beginning of a number so it's always displayed using two digits.

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.

Lay out gapfills so the student has to enter either the numerator or denominator of a fraction.

This exam uses a custom theme which provides a new logo image.

This shows how to use variable name annotations inside \simplify to display a 3D vector in terms of the standard unit vectors $\boldsymbol{i}$, $\boldsymbol{j}$, $\boldsymbol{k}$

The student is asked to write a number with a certain property, or tick a box labelled "this is impossible" if it can't be done.

A custom marking algorithm on the gap-fill part first checks if the student ticked the box. If they did, their answer is marked correct if it really is impossible. If they didn't tick it, their number is checked against the required property.

Demo showing how to write a custom function in javascript.

This question shows how to run some JavaScript code when the question's HTML is displayed on the page.

This question shows how to use the 'adviceDisplayed' signal to run some javascript when the question's advice is revealed to the student.

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

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

This shows how to implement a recursive function in JavaScript with a nested function definition.

The student must write a percentage, using the % symbol. An alternative answer checks the cases where they forgot the percent sign (e.g. 55), or entered the corresponding scalar (e.g. 0.55).

This demonstrates how to render a set of tuples such as $\{(1,2),(3,4)\}$ in LaTeX, starting with a list of pairs of numbers.

Shows how to enter a logarithm to an arbitrary base, in a mathematical expression part.

Ask for the squares of five randomly-chosen numbers between 0 and 15.

The shuffle function puts a list in random order.

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

A table showing how to substitute raw LaTeX code into question text.

NOTE: You probably don't want to do this! There's usually a more robust way, where you get Numbas to make the expression for you.

Demonstrates how to create variables containing LaTeX commands, and how to use them in the question text.