Subject: Das Kapital 19 general knowledge quiz questions. It should take around 4 minutes to complete all the questions.

Subject: Famous economists 18 general knowledge quiz questions. It should take around 4 minutes to complete all the questions.

Subject: Revolutionary thinker 28 general knowledge quiz questions. It should take around 6 minutes to complete all the questions.

Subject: Radical thinker 26 general knowledge quiz questions. It should take around 6 minutes to complete all the questions.