All sections and questions in a quiz will be located in the BUILD page. The randomization settings are located inside section.
If you do not have a section, please proceed to create a section first, and then drag and drop those questions into that section which you need to display the order randomly.
If you have already created a section, you can click on the section title to edit it. The section options form will appear and you can make your edit.
In the section option window, choose to enable Randomize Question or Randomize Question Options
Make sure that you have drag and drop those questions in to that section which you need to display the order randomly.
Please remember to click the SAVE QUIZ button from the right hand side whenever you have completed the changes.