[5cents]

The technical blog of the public broadcaster of Norway has implemented exactly this: https://nrkbeta.no/2017/08/10/with-a-quiz-to-comment-readers...

The quiz module is open-source (https://nrkbeta.no/2017/03/06/our-comment-quiz-module-is-now...) and available on github https://github.com/nrkbeta/nrkbetaquiz

[millerm]

Thanks for the links. :-)