Loading...
Error
There was an error loading the page.
Taxonomy:
Contributors
History and Feedback
Christian LawsonPerfect 2 years, 4 months ago
Gave some feedback: Ready to use
Christian LawsonPerfect 2 years, 4 months ago
Saved a checkpoint:
You're right! I've fixed it, and improved the TeX. Worried that I let that slip by!
Deirdre Casey 2 years, 5 months ago
Gave some feedback: Has some problems
Deirdre Casey 2 years, 5 months ago
I think there is a sign error in the second equation in part b.
Christian LawsonPerfect 2 years, 8 months ago
Gave some feedback: Ready to use
Christian LawsonPerfect 2 years, 8 months ago
Saved a checkpoint:
Set up the randomisation again so that all numbers are integers.
In part a, the $x$ coefficient of the second equation is a multiple of the coefficient in the first equation.
In part b, the LCMs of the $x$ and $y$ coefficients are strictly larger than any of the coefficients.
Elliott Fletcher 2 years, 8 months ago
Published this.Lauren Richards 2 years, 9 months ago
Gave some feedback: Needs to be tested
Lauren Richards 2 years, 9 months ago
 I've made sure that the solutions are integers but that has meant that the question is not randomised.
 I'm also having a little trouble in centering a section of part a) which includes an overline and a subtraction.
 Otherwise, I've made all the changes you requested.
Christian LawsonPerfect 2 years, 9 months ago
Gave some feedback: Has some problems
Christian LawsonPerfect 2 years, 9 months ago
Saved a checkpoint:
I'd prefer it if you made sure that the solutions are always integers. Rounding errors are a distraction here. Generate the solutions first, then come up with a pair of independent equations.
I'm not sure about the way you've set out subtracting one equation from another  it's not obvious that the minus signs cancel out when there's a negative coefficient. This is one of the big problems that trips people up when doing this.
Be careful with, for example, "We have to multiply the entire first equation by 3, not just the x term to ensure we do not change the value of the equation."  an equation doesn't have a 'value'. You could instead say that you want to keep the same solution.
Right at the end of the advice, I don't like $8(5)$ for multiplication  $8 \times 5$ is much more conventional.
Lauren Richards 2 years, 9 months ago
Gave some feedback: Needs to be tested
Lauren Richards 2 years, 9 months ago
It won't let me put visibility conditions on it. :(
Lauren Richards 2 years, 9 months ago
Created this.No variables have been defined in this question.
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.
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.
Pattern restriction
Variables
String restrictions
Answers  

Choices 
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:
Name  Value  

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: 


Expected: 

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.
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.
to
This question is used in the following exams:
 maths practicerevision by David Martin in David's workspace.
 Week 2  Practice Exercises by Bobby Kahlon in Bobby's workspace.
 HI by Pádhraic O' Hanrahan in Numbas Workshop.
 Example exam by Emma Howard in Emma's workspace.
 My first test by Marie Nicholson in Marie's workspace.
 Linear equations test by John Sheekey in John's workspace.
 Test on some stuff by Christian LawsonPerfect in Christian's workspace.
 P1  Algebra & Functions by Rob Beckett in Rob's workspace.
 Simultaneous Eqns Test by Ann Smith in Ann's workspace.
 Week 4  Simultaneous Equations by Paul Finley in Paul's workspace.
 Essential Maths exam by Maria Aneiros in Maria's workspace.
 Algebra by Alan Levine in Mathtest Questions.
 Solving Linear Equations by Katie Bullen in Katie's workspace.
 Preliminary Mathematics Advanced Assessment Task 1 by Joanna Rankins in Joanna's workspace.