Hello, There are 4 quiz tests in that section, but all of them are identical. I guess there is some kind of mistake here, it would be better to fix it.

Hi Nurlan! Thanks for reaching out. Thank you for pointing this out. I made a check in our content organization and there seems to be no issue with the quizzes. Therefore, can you please be more specific - which lectures/section does this issue refer to? We'd like to try resolving this issue as quickly as possible. If you could support your request with a screenshot and/or links, that'd be great! Thank you very much!!! Hope this helps. Best, Martin