The option to randomly order or shuffle questions in a Moodle quiz is part of the quiz layout. You can select this option when first adding questions to the quiz or after the quiz is assembled. Once students have begun taking the quiz, this option is no longer available.
If you choose to select Shuffle be aware that:
The shuffling will be applied to ALL questions in the full quiz.
If you have set a number of questions per page, Moodle observes that setting but still shuffles ALL questions to ANY page.
Moodle does not have separate quiz sections, only page breaks. You cannot apply the shuffle effect to only certain pages or part of the quiz.
If you use any Descriptive questions (as informative headers of a section of questions) the description(s) will also be shuffled.
Selecting the shuffle questions option
Go to the course homepage and click the link for the quiz.
In the Administration block under Quiz Administration, click Edit Quiz.
Select the Shuffle option. (Located far right margin near the top of page.)
Exit the Edit Quiz page. Your choice will be saved automatically.