Timed quizzes - can I capture time remaining as a variable?

If you look in the built-in variables you can find the Project.ElapsedTime, Scene.ElapsedTime, and SlideElapsedTime variables. 

Depending on your context putting timer on a quiz is not considered a best practice as it unfairly penalizes people who use keyboards or screen readers to navigate the course, or those who are neurodivergent.