The most difficult UE riddles A list of UE related questions that are most often answered incorrectly Europe quiz What percentage of Czechs have completed at least secondary education?Over 90% of Czechs have completed at least secondary education. This is the highest result in the EU ranking right next to Poles, Slovaks and Slovenians.very hard 34% over 90%over 90%34%about 75%about 75%35%about 60%about 60%22%about 40%about 40%8%Created by: Tschuka. Statistics based on 2310 answers in 2 languages »Czech Republic riddles » In which city is the headquarters of the European Central Bank?Frankfurt am Main. The bank is based in Frankfurt, the largest financial center in the Eurozone (although not the largest in the European Union). Its location in the city is fixed by the Amsterdam Treaty along with other major institutions.very hard 38% LondonLondon10%BrusselsBrussels32%Frankfurt am MainFrankfurt am Main38%LuxembourgLuxembourg17%Created by: globalquiz.org. Statistics based on 7255 answers in 2 languages »EU riddles » Which country is the top natural gas producer in the European Union?The Netherlands. 50% of the natural gas production in the Netherlands comes from the Groningen Gas Field, being the largest natural gas field in Europe and the tenth largest in the world. The other 50% being supplied by around 300 smaller fields, mostly in the North Sea.hard 42% United KingdomUnited Kingdom25%The NetherlandsThe Netherlands42%ItalyItaly10%FranceFrance22%Created by: Kasia. Statistics based on 11397 answers in 2 languages »natural resources riddles » In which EU country is Cyrillic script used?Bulgaria. Cyrillic script is used in Bulgaria, Bosnia and Herzegovina, Belarus, Kazakhstan, Macedonia, Montenegro, Russia, Serbia, Tajikistan, Kyrgyzstan and Ukraine. Of these, only Bulgaria belongs to the European Union.average 60% RomaniaRomania8%BulgariaBulgaria60%UkraineUkraine21%SerbiaSerbia9%Created by: globalquiz.org. Statistics based on 19879 answers in 2 languages »Balkans riddles » How many stars are on the EU flag?12. The number of stars on the flag (designed in 1955) does not vary according to the members of the organization. They are intended to represent all the peoples of Europe, even those outside European integration.average 69% 10101%121269%151516%272711%Created by: Kasia. Statistics based on 34441 answers in 3 languages »flags riddles » Play Europe quiz and see all the questions.