Hi Kaulin,
I would agree with @ondrej that the polls feature within Discourse would be the best way to conduct a quiz and then analyze the results. If you need some assistance setting up polls on your site, we have a How to Create Polls tutorial that will help guide you through this process.
Once your quizzes have been completed, you could then export the data from each poll into a .CSV file using the “Export” button, or use the Data Explorer to query Discourse directly for information about the poll results. For reference, Is it possible to see who voted in polls? has an example query for pulling data about your polls if you’re interested in using that option.