Video Guide

Create a Calculated Formula Question (YouTube, 3m 1s)


Questions can be added to a test (refer Create a Test guide) or pool (refer Create a Pool guide).

A Calculated Formula question contains a formula, the variables of which are set to change for each user. You specify the minimum and maximum value for each variable and answer sets are randomly generated.


The steps for adding a creating a calculated formula question are:

  1. Create the question and formula.
  2. Define the values for the variable.
  3. Confirm the variables and answers.

Example question

Calculate the Creatinine clearance for a female patient according to the Cockgroft-Gault equation to two decimal places.

Age = ?

Weight = ?

Creatinine clearance = ?

Cockcroft-Gault GFR =((140-age) x (Wt in Kg) * 0.85) / (72 * Cr)

Select question type

  1. Click on the Create Question button.
  2. Select Calculated Formula from the drop down menu.

Create question button circled and calculated formula circled from drop down menu


  1. Enter a descriptive title into the Question Title text box.
  2. Enter the question into the Question Text textbox.
  3. Include unique variables in square brackets (e and pi cannot be used as variables). Note, a variable is not required for the answer.

Question setup with question title circled and variables circled in the question text box

Answer Formula

  1. Enter the required formula in equation editor using the variables from the question. Note, a variable for the answer and an equal sign are not required.

Answer formula box with an example formula in the box


  1. Enter the accuracy range for a correct answer in Answer Range +/- textbox.

Note:  This option allows you to specify one correct answer (i.e. Answer Range = 0) or a range of answers.

  1. If you wish to give partial credit, select the Allow Partial Credit checkbox.
    • Enter the accuracy range into the Partial Credit Range +/- textbox.
    • Enter percentage into the Partial Credit Points Percentage textbox.

Note:  This option could be used to give partial credit for rounding errors i.e. if the answer is to 2 decimal places set the Partial Credit Range  to 0.01.

Options page with the Answer range, allow partial credit, partial credit range and partial credit points circled

Submit Information

  1. Click on the Next Button.

Define Variables

  1. For each variable enter:

    • The lowest value possible in the Minimum Value textbox.
    • The highest value possible in the Maximum Value textbox.
    • Select the required number of Decimal Places from the drop down list.

Define variables with minimum value, maximum value and decimal places boxes circled

Answer Set Options

  1. Select the required number of Decimal Places for Answer from the drop down list.
  2. Enter the required Number of Answer Sets in the textbox.
  3. Select the required number of Correct Answer Formal from the drop down list. i.e. Normal or Exponential

Answer set options with the decimal places for answer, number of answer sets and correct answer format options all circled

Submit Information

  1. Click on the Next Button.

Edit Set Answers

  1. Click the Calculate button, to view the answers.
  2. If you need to remove an answer set, click on the appropriate  Remove button.


  1. Giving specific feedback is optional. The default is Correct / Incorrect.

Feedback section with the correct response feedbask and incorrect response feedback text boxes circled

Categories and Keywords

Adding categories and keywords to questions, allows you to search you tests and pools for questions by topic etc.

To add a new Category / Topic / Level of Difficulty / Keyword:

  1. Click on the Add button.
  2. Click on the OK button.

To delete a Category / Topic / Level of Difficulty / Keyword:

  1. Click on the Delete button.

To add an existing Category / Topic / Level of Difficulty / Keyword:

  1. Click on the Choose from Existing button.
  2. Select a word from the drop down list.

Categories and keywords with the add button, red X Add tag text box, ok and choose from existing all circled

Instructor Notes

  1. Notes added in the Instructor Notes text box cannot be viewed by students.

Instructor notes with text box circled


  1. Click on the  Submit button.

View of newly created calculated formula question.