How to change the number of quiz attempts
Log into your account and navigate to your CDX home page. From the navigation on the left, click the course with the quiz you would like to change settings for. Then, find and click on the quiz.
On the next page, click the gear icon in the upper right corner. Then, select Edit Settings.
To change the number of attempts, select a number from the drop-down menu next to Attempts Allowed. Once you’ve finished, click Save and Display at the bottom of the page.