There was an error loading the page.

Try to answer the following questions here:

  • What is this question used for?
  • What does this question assess?
  • What does the student have to do?
  • How is the question randomised?
  • Are there any implementation details that editors should be aware of?


Lyn's workspace





Checkpoint description

Describe what's changed since the last checkpoint.

Lyn Gardner 4 years, 2 months ago

Published this.

Lyn Gardner 4 years, 11 months ago

Created this.

There is only one version of this question.

Give any introductory information the student needs.

No variables have been defined in this question.

This variable was automatically created because there's a reference to it somewhere in this question.



  • When applying the function,
    • Change the signature of parameter from to .

This variable is an HTML node. HTML nodes can not be relied upon to work correctly when resuming a session - for example, attached event callbacks will be lost, and mathematical notation will likely also break.

If this causes problems, try to create HTML nodes where you use them in content areas, instead of storing them in variables.

Describe what this variable represents, and list any assumptions made about its value.

← Depends on:
→ Used by:

This variable doesn't seem to be used anywhere.

Name Type Generated Value

Error in variable testing condition

There's an error in the condition you specified in the Variable testing tab. Variable values can't be generated until it's fixed.


for seconds

Running for ...

Help with explore mode


Name Limit


Name Limit

No parts have been defined in this question.

Select a part to edit.

Ask the student a question, and give any hints about how they should answer this part.

The correct answer is an equation. Use the accuracy tab to generate variable values satisfying this equation so it can be marked accurately.

Advanced settings

Checking accuracy

Define the range of points over which the student's answer will be compared with the correct answer, and the method used to compare them.

Variable value generators

Give expressions which produce values for each of the variables in the expected answer. Leave blank to pick a random value from the range defined above, following the inferred type of the variable.

Pattern restriction


String restrictions

Advanced settings

Advanced settings

Advanced settings

Advanced settings

For each choice, specify the number of marks to add or subtract when the student picks it.

For each choice, write 1 if the student should tick it, or 0 if they should leave it unticked.

You must set a maximum number of marks in order to use this marking method.

Advanced settings

You must set a maximum number of marks in order to use this marking method.

For each combination of answer and choice, specify the number of marks to add or subtract when the student picks it.

For each combination of answer and choice, write 1 if the student should tick it, or 0 if they should leave it unticked.

Both choices and answers must be defined for this part.

Advanced settings

Help with this part type

Base marking algorithm

Custom marking algorithm

Test that the marking algorithm works

Check that the marking algorithm works with different sets of variables and student answers using the interface below.

Create unit tests to save expected results and to document how the algorithm should work.

There's an error which means the marking algorithm can't run:

Your answer is being marked.


Gap Expected answer Student's answer

Question variables

These variables are available within the marking algorithm.

Name Value

Marking parameters

These values are available as extra variables in the marking algorithm.

Name Value

Part settings

These values are available as entries in the settings variable.

Name Value

This feedback is based on your last submitted answer. Submit your changed answer to get updated feedback.


Alternative used:

Note Value Feedback

Click on a note's name to show or hide it. Only shown notes will be included when you create a unit test.

Unit tests

No unit tests have been defined. Enter an answer above, select one or more notes, and click the "Create a unit test" button.

The following tests check that the question is behaving as desired.

This test has not been run yet This test produces the expected output This test does not produce the expected output

This test is not currently producing the expected result. Fix the marking algorithm to produce the expected results detailed below or, if this test is out of date, update the test to accept the current values.

One or more notes in this test are no longer defined. If these notes are no longer needed, you should delete this test.

Name Value

Note Value Feedback
This note produces the expected output Current:

This test has not yet been run.

When you need to change the way this part works beyond the available options, you can write JavaScript code to be executed at the times described below.

Run this script the built-in script.

This script runs after the built-in script.

To account for errors made by the student in earlier calculations, replace question variables with answers to earlier parts.

In order to create a variable replacement, you must define at least one variable and one other part.

Variable Answer to use Must be answered?

The variable replacements you've chosen will cause the following variables to be regenerated each time the student submits an answer to this part:

These variables have some random elements, which means they're not guaranteed to have the same value each time the student submits an answer. You should define new variables to store the random elements, so that they remain the same each time this part is marked.

More information about this problem

This part can't be reached by the student.

Add a "next part" reference to this part from another part.

None of the parts which can lead to this part are reachable either.

Next part options

Define the list of parts that the student can visit after this one.

  • Variable replacements

    No variable replacements have been defined for this next part option.
    Variable Value

Previous parts

This part can follow on from:

This part doesn't follow on from any others.



Alternative answers


Alternative answers


Alternative answers

Give a worked solution to the whole question.

Select extensions to use in this question.

  • There was an error loading this extension.

Define rulesets for simplification and display of mathematical expressions.

Define functions to use in JME expressions.

  • Parameters
    • : of

Built-in constants

Tick the built-in constants you wish to include in this question.

Custom constants

You can define constants in terms of the built-in constants, even if they're disabled.
Names Value LaTeX

Add styling to the question's display and write a script to run when the question is created.

This script will run after the question's variable have been generated but before the HTML is attached.
Apply styling rules to the question's content.

This question is used in the following exam: