| States of Germany Map Quiz | 0 | - | 4.91 | 131,599 |
| States of Germany | 0 | - | 4.96 | 149,884 |
| Germany Immigration by Country | 0 | - | 4.84 | 79,963 |
| States of the German Confederation in 1848 | 0 | - | 4.89 | 31,497 |
| History of Germany | 0 | - | 4.39 | 52,597 |
| Germany Country Quiz | 0 | - | 4.82 | 156,450 |
| Modern Day Countries of the Dutch Empire on a Map | 0 | - | 4.87 | 60,317 |
| Countries of Iberia in History with a Map | 0 | - | 4.87 | 41,094 |
| Modern Day Countries of the Spanish Empire on a Map | 0 | - | 4.95 | 85,438 |
| Counties of England | 0 | - | 4.97 | 788,638 |
| Wives of King Henry VIII | 0 | - | 4.55 | 53,158 |
| Countries the UK Declared War On | 0 | - | 4.61 | 121,725 |
| Geography of the British Empire | 0 | - | 4.48 | 39,465 |
| Countries of Europe in 1815 With a Map | 0 | - | 4.99 | 148,833 |
| Countries of Europe in 1848 | 0 | - | 4.98 | 75,338 |
| Countries of Europe in 1870 with a Map | 0 | - | 4.95 | 63,293 |
| Every Country of Europe Since 1815 With a Map | 0 | - | 4.98 | 70,032 |
| Countries of Europe in 1360 with a Map | 0 | - | 4.99 | 55,947 |
| Regions of France Map Quiz | 0 | - | 4.97 | 143,040 |
| Ancient Greek Trivia | 0 | - | 4.62 | 66,751 |
| Geography of Ancient Greece | 0 | - | 4.69 | 31,761 |
| Regions of Italy | 0 | - | 4.92 | 74,623 |
| Netherlands Immigration by Country | 0 | - | 4.94 | 43,764 |
| Regions of Spain Quiz | 0 | - | 4.90 | 112,193 |
| Cantons of Switzerland | 0 | - | 4.98 | 50,073 |
| Countries and Territories of the United Kingdom | 0 | - | 4.89 | 92,864 |
| Medieval English History | 0 | - | 4.53 | 43,299 |
| Europe Map Quiz | 0 | - | 5.00 | 4,728,777 |
| French History Multiple Choice | 0 | - | 4.55 | 32,860 |
| Countries Bordering Germany | 0 | - | 4.99 | 366,833 |
| Anglo-Saxon and Viking Kings of England | 0 | - | 4.74 | 12,084 |
| Biggest Countries in Europe in 1700 | 0 | - | 4.73 | 58,112 |
| France Cities Map Quiz | 0 | - | 4.96 | 165,103 |
| Departments of France | 0 | - | 4.93 | 52,715 |
| Germany Cities Map Quiz | 0 | - | 4.87 | 125,078 |
| States of the Holy Roman Empire in 1356 | 0 | - | 4.97 | 72,377 |
| Italy Country Quiz | 0 | - | 4.82 | 122,119 |
| Regions of Italy Map Quiz | 0 | - | 4.96 | 148,302 |
| Italy Cities Map Quiz | 0 | - | 4.97 | 151,010 |
| Countries Surrounding Rome | 0 | - | 4.97 | 49,349 |
| Spain Cities Map Quiz | 0 | - | 4.87 | 95,902 |
| Regions of Spain Map Quiz | 0 | - | 4.95 | 184,553 |
| Modern-Day Countries of the British Empire in 1921 | 0 | - | 4.99 | 116,164 |
| Name the English Monarchs | 0 | - | 4.92 | 497,579 |
| Anglo-Saxon Kingdoms of England | 0 | - | 4.60 | 25,685 |
| Giant Great Britain Millennium Quiz | 0 | - | 4.78 | 20,068 |
| England or Wales? | 0 | - | 4.94 | 45,289 |
| Europe by Borders in 30 Seconds | 0 | - | 4.98 | 424,964 |
| Biggest Cities in Germany in 1910 | 0 | - | 4.41 | 23,375 |
| Countries With the Most German Speakers | 0 | - | 4.89 | 94,125 |
| Embarrassing Chapters in British History | 0 | - | 4.29 | 32,104 |
| History of Scotland | 0 | - | 4.51 | 20,994 |
| Andorra Country Quiz | 0 | - | 4.90 | 31,363 |
| Kings of France Quiz | 0 | - | 4.20 | 32,545 |
| Countries that Beat Germany | 0 | - | 4.95 | 105,294 |
| Country Quiz on a Map - Germany | 0 | - | 4.95 | 34,422 |
| German Inventions | 0 | - | 3.91 | 30,177 |
| Embarrassing Chapters in German History | 0 | - | 3.41 | 12,565 |
| The Trojan War | 0 | - | 4.83 | 39,403 |
| Letters of the Greek Alphabet | 0 | - | 4.97 | 641,451 |
| Name that Greek Letter | 0 | - | 4.94 | 321,491 |
| Greek Mythology General Knowledge #1 | 0 | - | 4.85 | 110,427 |
| Ancient Roman Trivia #1 | 0 | - | 4.85 | 84,005 |
| Roman Emperors | 0 | - | 4.95 | 118,356 |
| Malta Country Quiz | 0 | - | 4.81 | 30,801 |
| Countries That Use the Euro | 0 | - | 4.96 | 102,821 |
| Europe Cities Map Quiz | 0 | - | 4.99 | 362,150 |
| 10 Easternmost Countries in Europe | 0 | - | 4.89 | 113,412 |
| The Only European Country ... | 0 | - | 4.91 | 213,609 |
| European Countries NOT in NATO | 0 | - | 4.87 | 59,392 |
| History of Russia Quiz | 0 | - | 4.49 | 31,781 |
| 101 Figures from Greek Mythology | 0 | - | 4.99 | 124,140 |
| History of Italy | 0 | - | 4.55 | 31,805 |
| Geography of the Dutch Empire | 0 | - | 4.62 | 34,470 |
| History of The Netherlands | 0 | - | 4.46 | 17,303 |
| Countries of the Spanish Empire | 0 | - | 4.52 | 76,966 |
| Invasions of Great Britain | 0 | - | 4.51 | 59,368 |
| Former Dominions of the British Empire | 0 | - | 4.30 | 24,069 |
| British History Multiple Choice #1 | 0 | - | 4.46 | 54,944 |
| British History Multiple Choice #2 | 0 | - | 4.42 | 37,819 |
| Flags of Europe Quiz | 0 | - | 4.99 | 1,225,055 |
| Countries of Europe - One Minute Sprint | 0 | - | 4.94 | 1,319,010 |
| 10 Biggest European Countries by Area | 0 | - | 4.99 | 191,629 |
| 10 Westernmost Countries in Europe | 0 | - | 4.96 | 150,230 |
| Top 10 Languages Spoken in Europe | 0 | - | 4.96 | 216,152 |
| European Landmarks Map Quiz | 0 | - | 4.97 | 86,427 |
| Countries of Europe with an Empty Map | 0 | - | 5.00 | 307,651 |
| All First-Level Subdivisions of Europe on a Map | 0 | - | 4.98 | 167,674 |
| Countries with Territory in the Balkans | 0 | - | 4.96 | 88,187 |
| Eastern Europe Map Quiz | 0 | - | 4.91 | 127,093 |
| Slavic Countries | 0 | - | 4.96 | 110,798 |
| 15 Most Populous Countries that Speak a Germanic Language | 0 | - | 4.39 | 82,285 |
| Olympian Gods Quiz | 0 | - | 4.96 | 495,319 |
| Ancient Greek Words | 0 | - | 4.92 | 110,606 |
| Oldest Cities in the United Kingdom | 0 | - | 4.39 | 23,606 |
| History of London | 0 | - | 4.33 | 26,095 |
| "Big Five" European Soccer Champions Since 2000 | 0 | - | 4.97 | 349,443 |
| Regions of France | 0 | - | 4.78 | 119,103 |
| France Immigration by Country | 0 | - | 4.72 | 75,933 |
| Largest Islands of Greece | 0 | - | 4.59 | 47,423 |
| Roman Numeral Decoding Quiz | 0 | - | 4.94 | 433,265 |
| Two Letter Roman Numerals | 0 | - | 4.97 | 55,576 |
| Provinces of the Netherlands | 0 | - | 4.80 | 40,744 |
| 100 Greatest Britons Quiz | 0 | - | 4.41 | 48,031 |
| UK Cities Map Quiz | 0 | - | 4.95 | 461,997 |
| Foods in a Full English Breakfast | 0 | - | 4.46 | 101,893 |
| The UK for Americans - True or False | 0 | - | 4.46 | 58,377 |
| Champions League Winners | 0 | - | 4.92 | 995,531 |
| European Geography By Letter - P #1 | 0 | - | 4.81 | 96,285 |
| European Diaspora - Top 11 Countries | 0 | - | 4.90 | 94,987 |
| 10 European Countries with the Most Tourists | 0 | - | 4.98 | 136,269 |
| Three Band Flags of Europe | 0 | - | 4.98 | 191,735 |
| Pixelated Europe Map | 0 | - | 4.88 | 121,721 |
| Monarchies of Europe | 0 | - | 4.90 | 97,248 |
| European Countries with One Border | 0 | - | 4.97 | 181,514 |
| European Countries with the Fewest Borders | 0 | - | 4.97 | 178,132 |
| European Geography By Letter - B #2 | 0 | - | 4.83 | 76,161 |
| Federal Subjects of Russia | 0 | - | 4.94 | 143,743 |
| Countries That Border Russia | 0 | - | 4.98 | 458,673 |
| Countries Formerly in Yugoslavia | 0 | - | 4.95 | 124,130 |
| History of Austria | 0 | - | 4.70 | 17,742 |
| Austria Country Quiz | 0 | - | 4.57 | 59,306 |
| Belgium Country Quiz | 0 | - | 4.70 | 71,181 |
| France Country Quiz | 0 | - | 4.70 | 133,766 |
| French Inventions | 0 | - | 4.08 | 13,862 |
| Geography of the French Empire | 0 | - | 4.48 | 26,920 |
| The French Revolution | 0 | - | 4.46 | 23,758 |
| Countries Bordering France | 0 | - | 4.85 | 397,831 |
| History of Paris | 0 | - | 4.24 | 13,612 |
| History of France | 0 | - | 4.59 | 55,937 |
| German Cities with the Most Tourists | 0 | - | 4.77 | 48,166 |
| Countries Closest to Germany A-Z | 0 | - | 4.98 | 26,912 |
| Greece Country Quiz | 0 | - | 4.74 | 65,725 |
| Embarrassing Chapters in Italian History | 0 | - | 4.24 | 12,034 |
| Luxembourg Country Quiz | 0 | - | 4.77 | 33,455 |
| Monaco Country Quiz | 0 | - | 4.47 | 41,207 |
| Netherlands Country Quiz | 0 | - | 4.50 | 79,923 |
| Nordic Cities Map Quiz | 0 | - | 4.74 | 89,732 |
| The Vikings! | 0 | - | 4.45 | 28,237 |
| Sweden Immigration by Country | 0 | - | 4.55 | 55,667 |
| Portugal Country Quiz | 0 | - | 4.69 | 71,306 |
| The Portuguese Empire | 0 | - | 4.54 | 11,984 |
| Spain Country Quiz | 0 | - | 4.45 | 127,538 |
| Switzerland Country Quiz | 0 | - | 4.51 | 62,913 |
| Counties of England Map Quiz | 0 | - | 4.97 | 306,000 |
| United Kingdom A-Z | 0 | - | 4.53 | 87,181 |
| Largest Islands in the British Isles With a Map | 0 | - | 4.52 | 38,556 |
| British Geography Multiple Choice | 0 | - | 4.49 | 43,161 |
| 10 Closest Megacities to London | 0 | - | 4.90 | 17,397 |
| Counties of Wales | 0 | - | 4.63 | 38,843 |
| Countries of the Mongol Empire on a Map | 0 | - | 4.99 | 105,760 |
| Top 10 Coldest European Countries | 0 | - | 4.94 | 192,190 |
| Top 10 Hottest European Countries | 0 | - | 4.89 | 126,062 |
| Category Elimination - European Geography #1 | 0 | - | 4.98 | 230,328 |
| European Map without 10 Random Countries | 0 | - | 4.97 | 274,045 |
| Category Elimination - European Geography #2 | 0 | - | 4.99 | 164,996 |
| Name a Valid European Country #1 | 0 | - | 4.99 | 256,449 |
| Name a Valid European Country #2 | 0 | - | 4.94 | 113,108 |
| Russia Country Quiz | 0 | - | 4.85 | 113,587 |
| Croatia Country Quiz | 0 | - | 4.83 | 42,809 |
| Bosnia and Herzegovina Country Quiz | 0 | - | 4.86 | 35,009 |
| Most Popular Baby Girls Names in Germany | 0 | - | 4.51 | 38,616 |
| German History A-Z | 0 | - | 4.49 | 24,195 |
| Figures from Greek Mythology | 0 | - | 4.91 | 184,767 |
| History of Ireland | 0 | - | 4.39 | 30,800 |
| Countries Italy Declared War On | 0 | - | 4.75 | 42,921 |
| Byzantine History | 0 | - | 4.91 | 28,596 |
| Canary Islands | 0 | - | 4.61 | 17,390 |
| Biggest Spanish Empire Countries | 0 | - | 4.91 | 114,701 |
| Switzerland Immigration by Country | 0 | - | 4.70 | 29,108 |
| British Spellings | 0 | - | 4.07 | 99,195 |
| British Groups of Things | 0 | - | 4.25 | 82,659 |
| British Acronyms | 0 | - | 4.39 | 45,608 |
| UK Immigration by Country | 0 | - | 4.94 | 139,522 |
| United Kingdom Decoder | 0 | - | 4.29 | 39,942 |
| United Kingdom Country Quiz | 0 | - | 4.96 | 138,035 |
| Biggest Immigrant Groups by Decade in the UK | 0 | - | 4.62 | 24,403 |
| Geography of Scotland | 0 | - | 4.63 | 21,469 |
| All UEFA Champions League Teams Ever | 0 | - | 4.84 | 128,358 |
| U.S. Presidents Quiz | 0 | - | 5.00 | 3,650,466 |
| Deadliest U.S. Wars | 0 | - | 4.89 | 189,164 |
| Countries That Touch the Adriatic Sea | 0 | - | 4.96 | 70,765 |
| European Countries with the Fewest Overnight Visitors | 0 | - | 4.78 | 41,596 |
| Top 10 European Countries by Coastline | 0 | - | 4.89 | 137,796 |
| Top 20 Football Clubs in Europe | 0 | - | 4.48 | 112,889 |
| 100 Longest Rivers in Europe - with a Map | 0 | - | 4.94 | 64,763 |
| Category Elimination - European Countries #1 | 0 | - | 4.89 | 88,903 |
| The Only Remaining European Country . . . | 0 | - | 4.41 | 63,743 |
| Countries that Border Poland | 0 | - | 4.99 | 171,264 |
| Non-Bordering Countries Closest to Russia | 0 | - | 4.91 | 82,347 |
| Countries that Beat Russia | 0 | - | 4.84 | 81,819 |
| Countries With the Most Russian Speakers | 0 | - | 4.97 | 98,262 |
| Countries that Border Hungary | 0 | - | 4.98 | 103,640 |
| North Macedonia Country Quiz | 0 | - | 4.81 | 27,589 |
| Moldova Country Quiz | 0 | - | 4.81 | 30,522 |
| Countries Bordering Serbia | 0 | - | 4.96 | 91,677 |
| French Geography Quiz #1 | 0 | - | 4.89 | 34,499 |
| Countries Bordering Austria | 0 | - | 4.97 | 117,708 |
| 20 Questions About France | 0 | - | 4.11 | 32,331 |
| Countries that Visit France the Most | 0 | - | 4.85 | 45,491 |
