Designing effective online maths assessments can be challenging, especially when you want each student to receive a unique version of a problem. Randomised questions are a powerful way to support academic integrity, reduce answer-sharing, and create personalised learning experiences. Blackboard Ultra includes a Calculated Formula question type that makes this easy to implement by allowing you to build questions that automatically generate numbers within specified ranges.
This article provides a simple overview of how to create maths test questions using formulas in Blackboard Ultra, including how to define variables and let the system create randomised versions of each question. Even if you’ve never used Ultra’s more advanced question types before, the process is straightforward and flexible enough to support topics across algebra, physics, finance, and more.
Creating a formula-based question
To begin, create your test in Blackboard Ultra as you normally would. When adding a new question, choose Calculated Formula Question. This question type allows you to enter a mathematical expression that includes one or more variables – for example, 2a + b or sin(x).
Each variable can be assigned a numeric range and level of precision. Once you define those ranges, Blackboard Ultra automatically generates multiple distinct variations of your question—each with different values for the variables, and each with the correct answer calculated for you. This means you can build a single question that becomes many.
Video demonstration
If you’d like to see the process in action, the short video below provides a clear, guided walkthrough. It demonstrates how to add a Calculated Formula question, define variable ranges, and preview the randomised versions that Blackboard Ultra generates.
Conclusion
Randomised formula questions are an efficient way to enrich your online maths assessments. They help prevent answer-sharing, encourage genuine problem-solving, and reduce the need to author large numbers of similar questions. Because Blackboard Ultra handles the variable generation and answer calculation automatically, you can focus on designing questions that target the skills you want to assess.
If you’re new to this feature, consider starting with a simple example – just one or two variables – and gradually building up to more complex expressions. The more you experiment, the more you’ll discover how flexible and time-saving Ultra’s formula-based questions can be for your teaching.
Useful links
- Blackboard Help – Calculated Formula Questions instructor guide (with details on defining variables, answer formula, answer sets, precision, partial credit, etc.)
- Blackboard Help – Create Tests instructor guide (with details on adding test content, test visibility, test settings, question and answer randomisation etc.)