| States of the German Confederation in 1848 | 0 | - | 4.90 | 32,473 |
| States of Germany Map Quiz | 0 | - | 4.92 | 133,850 |
| States of Germany | 0 | - | 4.95 | 154,621 |
| Germany Immigration by Country | 0 | - | 4.86 | 81,722 |
| History of Germany | 0 | - | 4.39 | 52,980 |
| Germany Country Quiz | 0 | - | 4.82 | 158,887 |
| Modern Day Countries of the Dutch Empire on a Map | 0 | - | 4.87 | 61,696 |
| Countries of Iberia in History with a Map | 0 | - | 4.88 | 42,422 |
| Modern Day Countries of the Spanish Empire on a Map | 0 | - | 4.95 | 86,906 |
| Counties of England | 0 | - | 4.97 | 803,271 |
| Wives of King Henry VIII | 0 | - | 4.55 | 53,468 |
| Countries the UK Declared War On | 0 | - | 4.55 | 123,289 |
| Geography of the British Empire | 0 | - | 4.48 | 39,851 |
| Countries of Europe in 1815 With a Map | 0 | - | 4.99 | 151,422 |
| Countries of Europe in 1848 | 0 | - | 4.98 | 85,599 |
| Countries of Europe in 1870 with a Map | 0 | - | 4.95 | 65,850 |
| Every Country of Europe Since 1815 With a Map | 0 | - | 4.97 | 71,899 |
| Countries of Europe in 1360 with a Map | 0 | - | 4.99 | 57,622 |
| Regions of France Map Quiz | 0 | - | 4.97 | 145,689 |
| Ancient Greek Trivia | 0 | - | 4.62 | 67,247 |
| Geography of Ancient Greece | 0 | - | 4.69 | 32,051 |
| Regions of Italy | 0 | - | 4.92 | 77,133 |
| Netherlands Immigration by Country | 0 | - | 4.93 | 52,825 |
| Regions of Spain Quiz | 0 | - | 4.90 | 115,396 |
| Cantons of Switzerland | 0 | - | 4.98 | 51,789 |
| Countries and Territories of the United Kingdom | 0 | - | 4.90 | 94,553 |
| Medieval English History | 0 | - | 4.53 | 43,662 |
| Europe Map Quiz | 0 | - | 5.00 | 4,789,498 |
| French History Multiple Choice | 0 | - | 4.55 | 33,248 |
| Countries Bordering Germany | 0 | - | 4.99 | 371,947 |
| Anglo-Saxon and Viking Kings of England | 0 | - | 4.75 | 12,345 |
| Biggest Countries in Europe in 1700 | 0 | - | 4.73 | 58,763 |
| Andorra Country Quiz | 0 | - | 4.91 | 31,952 |
| France Cities Map Quiz | 0 | - | 4.96 | 167,851 |
| Departments of France | 0 | - | 4.93 | 55,219 |
| Germany Cities Map Quiz | 0 | - | 4.87 | 127,113 |
| States of the Holy Roman Empire in 1356 | 0 | - | 4.97 | 75,429 |
| Regions of Italy Map Quiz | 0 | - | 4.96 | 150,279 |
| Italy Cities Map Quiz | 0 | - | 4.97 | 153,085 |
| Countries Surrounding Rome | 0 | - | 4.97 | 49,753 |
| Spain Cities Map Quiz | 0 | - | 4.87 | 97,522 |
| Regions of Spain Map Quiz | 0 | - | 4.95 | 186,919 |
| Modern-Day Countries of the British Empire in 1921 | 0 | - | 4.99 | 118,840 |
| Name the English Monarchs | 0 | - | 4.91 | 506,771 |
| Anglo-Saxon Kingdoms of England | 0 | - | 4.60 | 25,828 |
| Giant Great Britain Millennium Quiz | 0 | - | 4.78 | 20,245 |
| England or Wales? | 0 | - | 4.94 | 45,982 |
| Europe by Borders in 30 Seconds | 0 | - | 4.98 | 431,039 |
| Biggest Cities in Germany in 1910 | 0 | - | 4.41 | 23,562 |
| Countries With the Most German Speakers | 0 | - | 4.89 | 98,760 |
| Embarrassing Chapters in British History | 0 | - | 4.30 | 32,380 |
| History of Scotland | 0 | - | 4.51 | 21,177 |
| Kings of France Quiz | 0 | - | 4.21 | 32,936 |
| Countries that Beat Germany | 0 | - | 4.94 | 107,365 |
| Country Quiz on a Map - Germany | 0 | - | 4.95 | 35,578 |
| German Inventions | 0 | - | 3.91 | 30,285 |
| Embarrassing Chapters in German History | 0 | - | 3.40 | 12,686 |
| The Trojan War | 0 | - | 4.83 | 40,006 |
| Letters of the Greek Alphabet | 0 | - | 4.97 | 652,215 |
| Name that Greek Letter | 0 | - | 4.93 | 325,069 |
| Greek Mythology General Knowledge #1 | 0 | - | 4.85 | 113,019 |
| Ancient Roman Trivia #1 | 0 | - | 4.85 | 85,612 |
| Roman Emperors | 0 | - | 4.95 | 121,268 |
| Malta Country Quiz | 0 | - | 4.81 | 31,242 |
| Top 10 Oldest African Countries | 0 | - | 4.88 | 28,256 |
| Countries That Use the Euro | 0 | - | 4.95 | 106,919 |
| Europe Cities Map Quiz | 0 | - | 4.99 | 366,327 |
| 10 Easternmost Countries in Europe | 0 | - | 4.87 | 117,236 |
| The Only European Country ... | 0 | - | 4.91 | 219,184 |
| European Countries NOT in NATO | 0 | - | 4.91 | 62,613 |
| History of Russia Quiz | 0 | - | 4.47 | 32,009 |
| 101 Figures from Greek Mythology | 0 | - | 4.99 | 127,633 |
| History of Italy | 0 | - | 4.55 | 32,159 |
| Geography of the Dutch Empire | 0 | - | 4.62 | 34,829 |
| History of The Netherlands | 0 | - | 4.46 | 17,556 |
| Countries of the Spanish Empire | 0 | - | 4.52 | 77,432 |
| Invasions of Great Britain | 0 | - | 4.51 | 60,108 |
| Former Dominions of the British Empire | 0 | - | 4.27 | 24,277 |
| British History Multiple Choice #1 | 0 | - | 4.46 | 55,329 |
| British History Multiple Choice #2 | 0 | - | 4.42 | 38,095 |
| European Countries Ending in "IA" | 0 | - | 4.96 | 69,091 |
| Flags of Europe Quiz | 0 | - | 4.99 | 1,258,973 |
| Countries of Europe - One Minute Sprint | 0 | - | 4.94 | 1,336,109 |
| 10 Biggest European Countries by Area | 0 | - | 4.99 | 193,616 |
| 10 Westernmost Countries in Europe | 0 | - | 4.96 | 152,126 |
| Top 10 Languages Spoken in Europe | 0 | - | 4.96 | 220,938 |
| European Landmarks Map Quiz | 0 | - | 4.97 | 87,809 |
| Countries of Europe with an Empty Map | 0 | - | 5.00 | 312,891 |
| All First-Level Subdivisions of Europe on a Map | 0 | - | 4.99 | 176,010 |
| Countries with Territory in the Balkans | 0 | - | 4.96 | 90,234 |
| Eastern Europe Map Quiz | 0 | - | 4.91 | 128,818 |
| Slavic Countries | 0 | - | 4.96 | 112,412 |
| 15 Most Populous Countries that Speak a Germanic Language | 0 | - | 4.40 | 82,794 |
| Olympian Gods Quiz | 0 | - | 4.96 | 503,908 |
| Ancient Greek Words | 0 | - | 4.93 | 112,526 |
| Oldest Cities in the United Kingdom | 0 | - | 4.39 | 23,830 |
| History of London | 0 | - | 4.33 | 26,274 |
| "Big Five" European Soccer Champions Since 2000 | 0 | - | 4.97 | 361,931 |
| Regions of France | 0 | - | 4.70 | 122,167 |
| France Immigration by Country | 0 | - | 4.70 | 76,954 |
| Largest Islands of Greece | 0 | - | 4.59 | 48,509 |
| Roman Numeral Decoding Quiz | 0 | - | 4.94 | 439,954 |
| Two Letter Roman Numerals | 0 | - | 4.97 | 56,531 |
| Provinces of the Netherlands | 0 | - | 4.80 | 41,798 |
| 100 Greatest Britons Quiz | 0 | - | 4.41 | 48,414 |
| UK Cities Map Quiz | 0 | - | 4.96 | 466,538 |
| Foods in a Full English Breakfast | 0 | - | 4.46 | 103,853 |
| The UK for Americans - True or False | 0 | - | 4.43 | 58,819 |
| Champions League Winners | 0 | - | 4.92 | 1,016,611 |
| European Geography By Letter - P #1 | 0 | - | 4.81 | 99,017 |
| European Diaspora - Top 11 Countries | 0 | - | 4.88 | 96,871 |
| 10 European Countries with the Most Tourists | 0 | - | 4.98 | 138,576 |
| Three Band Flags of Europe | 0 | - | 4.98 | 194,653 |
| Pixelated Europe Map | 0 | - | 4.88 | 123,509 |
| Monarchies of Europe | 0 | - | 4.90 | 98,913 |
| European Countries with One Border | 0 | - | 4.97 | 183,862 |
| European Countries with the Fewest Borders | 0 | - | 4.97 | 180,580 |
| European Geography By Letter - B #2 | 0 | - | 4.87 | 88,934 |
| Federal Subjects of Russia | 0 | - | 4.95 | 149,611 |
| Countries That Border Russia | 0 | - | 4.98 | 464,604 |
| Countries Formerly in Yugoslavia | 0 | - | 4.95 | 125,500 |
| History of Austria | 0 | - | 4.70 | 17,977 |
| Austria Country Quiz | 0 | - | 4.57 | 60,068 |
| Belgium Country Quiz | 0 | - | 4.72 | 72,274 |
| France Country Quiz | 0 | - | 4.70 | 135,697 |
| French Inventions | 0 | - | 4.10 | 13,929 |
| Geography of the French Empire | 0 | - | 4.45 | 27,221 |
| The French Revolution | 0 | - | 4.47 | 24,151 |
| Countries Bordering France | 0 | - | 4.83 | 405,013 |
| History of Paris | 0 | - | 4.24 | 13,682 |
| History of France | 0 | - | 4.61 | 57,652 |
| German Cities with the Most Tourists | 0 | - | 4.77 | 49,124 |
| Countries Closest to Germany A-Z | 0 | - | 4.98 | 27,628 |
| Greece Country Quiz | 0 | - | 4.74 | 66,660 |
| Italy Country Quiz | 0 | - | 4.77 | 124,090 |
| Embarrassing Chapters in Italian History | 0 | - | 4.24 | 12,168 |
| Luxembourg Country Quiz | 0 | - | 4.78 | 33,957 |
| Monaco Country Quiz | 0 | - | 4.48 | 41,699 |
| Netherlands Country Quiz | 0 | - | 4.52 | 80,961 |
| Nordic Cities Map Quiz | 0 | - | 4.77 | 90,751 |
| The Vikings! | 0 | - | 4.46 | 28,409 |
| Sweden Immigration by Country | 0 | - | 4.53 | 56,397 |
| Portugal Country Quiz | 0 | - | 4.69 | 72,339 |
| The Portuguese Empire | 0 | - | 4.58 | 12,113 |
| Spain Country Quiz | 0 | - | 4.44 | 129,293 |
| Switzerland Country Quiz | 0 | - | 4.52 | 63,656 |
| Counties of England Map Quiz | 0 | - | 4.97 | 309,121 |
| United Kingdom A-Z | 0 | - | 4.51 | 88,390 |
| Largest Islands in the British Isles With a Map | 0 | - | 4.52 | 38,866 |
| British Geography Multiple Choice | 0 | - | 4.49 | 43,462 |
| 10 Closest Megacities to London | 0 | - | 4.90 | 17,843 |
| Counties of Wales | 0 | - | 4.63 | 39,637 |
| Top 10 Coldest European Countries | 0 | - | 4.94 | 193,950 |
| Top 10 Hottest European Countries | 0 | - | 4.88 | 127,844 |
| Category Elimination - European Geography #1 | 0 | - | 4.98 | 235,987 |
| European Map without 10 Random Countries | 0 | - | 4.97 | 278,998 |
| Category Elimination - European Geography #2 | 0 | - | 4.99 | 169,011 |
| Name a Valid European Country #1 | 0 | - | 4.99 | 264,801 |
| Name a Valid European Country #2 | 0 | - | 4.94 | 115,942 |
| Russia Country Quiz | 0 | - | 4.83 | 115,345 |
| Croatia Country Quiz | 0 | - | 4.83 | 43,773 |
| Bosnia and Herzegovina Country Quiz | 0 | - | 4.83 | 35,603 |
| Most Popular Baby Girls Names in Germany | 0 | - | 4.51 | 39,001 |
| German History A-Z | 0 | - | 4.49 | 24,923 |
| Most-Mentioned Characters in the Iliad | 0 | - | 4.81 | 20,980 |
| Figures from Greek Mythology | 0 | - | 4.91 | 188,951 |
| History of Ireland | 0 | - | 4.39 | 31,442 |
| Countries Italy Declared War On | 0 | - | 4.70 | 45,644 |
| Byzantine History | 0 | - | 4.91 | 29,030 |
| Byzantine Emperors | 0 | - | 4.93 | 14,616 |
| Canary Islands | 0 | - | 4.62 | 17,543 |
| Biggest Spanish Empire Countries | 0 | - | 4.91 | 116,981 |
| Switzerland Immigration by Country | 0 | - | 4.69 | 30,092 |
| British Spellings | 0 | - | 4.06 | 99,612 |
| British Groups of Things | 0 | - | 4.26 | 83,024 |
| British Acronyms | 0 | - | 4.40 | 45,947 |
| UK Immigration by Country | 0 | - | 4.94 | 141,761 |
| United Kingdom Decoder | 0 | - | 4.29 | 40,115 |
| United Kingdom Country Quiz | 0 | - | 4.96 | 141,078 |
| Biggest Immigrant Groups by Decade in the UK | 0 | - | 4.63 | 25,761 |
| English Monarchs in Order by First Letter | 0 | - | 4.38 | 32,139 |
| Geography of Scotland | 0 | - | 4.63 | 21,746 |
| All UEFA Champions League Teams Ever | 0 | - | 4.85 | 132,232 |
| Countries of the Mongol Empire on a Map | 0 | - | 4.99 | 107,578 |
| U.S. Presidents Quiz | 0 | - | 5.00 | 3,727,264 |
| Deadliest U.S. Wars | 0 | - | 4.89 | 191,830 |
| Countries That Touch the Adriatic Sea | 0 | - | 4.96 | 71,367 |
| European Countries with the Fewest Overnight Visitors | 0 | - | 4.80 | 41,723 |
| Top 10 European Countries by Coastline | 0 | - | 4.86 | 138,757 |
| Top 20 Football Clubs in Europe | 0 | - | 4.48 | 122,629 |
| 100 Longest Rivers in Europe - with a Map | 0 | - | 4.94 | 65,974 |
| Category Elimination - European Countries #1 | 0 | - | 4.90 | 91,128 |
| The Only Remaining European Country . . . | 0 | - | 4.41 | 64,697 |
| Countries that Border Poland | 0 | - | 4.99 | 173,211 |
| Non-Bordering Countries Closest to Russia | 0 | - | 4.91 | 83,295 |
| Countries that Beat Russia | 0 | - | 4.81 | 83,645 |
| Countries With the Most Russian Speakers | 0 | - | 4.97 | 102,954 |
| Countries that Border Hungary | 0 | - | 4.98 | 105,025 |
| North Macedonia Country Quiz | 0 | - | 4.81 | 28,059 |
| Moldova Country Quiz | 0 | - | 4.82 | 31,041 |
