Daniel Kanhneman(Nobel Prize Winner) link of a test(he wants you to fail it otherwise he would not get the prize). http://www.vanityfair.com/business/features/2011/12/kahneman-quiz-201112
Krugman Vs Summers debate
And the IGM economic experts panel… a straightforward debate killer… renowned economists killing misconceptions… touches a variety of areas, new questions every week.
Keynes Vs Hayek Debate
The not so serious ones are below