| States of the German Confederation in 1848 | 0 | - | 4.89 | 31,729 |
| Counties of England | 0 | - | 4.97 | 792,189 |
| History of Italy | 0 | - | 4.55 | 31,892 |
| Geography of the Dutch Empire | 0 | - | 4.62 | 34,554 |
| Countries of the Spanish Empire | 0 | - | 4.52 | 77,084 |
| Invasions of Great Britain | 0 | - | 4.51 | 59,702 |
| Europe Map Quiz | 0 | - | 5.00 | 4,744,350 |
| Countries of Europe in 1815 With a Map | 0 | - | 4.99 | 149,487 |
| Countries of Europe in 1848 | 0 | - | 4.98 | 75,813 |
| Countries of Europe in 1870 with a Map | 0 | - | 4.95 | 63,915 |
| Every Country of Europe Since 1815 With a Map | 0 | - | 4.98 | 70,458 |
| Countries of Europe in 1360 with a Map | 0 | - | 4.99 | 56,329 |
| Regions of France Map Quiz | 0 | - | 4.97 | 143,699 |
| States of Germany Map Quiz | 0 | - | 4.91 | 132,105 |
| States of Germany | 0 | - | 4.96 | 150,989 |
| Germany Immigration by Country | 0 | - | 4.85 | 80,327 |
| Regions of Italy | 0 | - | 4.92 | 75,138 |
| Netherlands Immigration by Country | 0 | - | 4.94 | 44,082 |
| Regions of Spain Quiz | 0 | - | 4.90 | 113,115 |
| Cantons of Switzerland | 0 | - | 4.98 | 50,691 |
| Countries and Territories of the United Kingdom | 0 | - | 4.89 | 93,304 |
| 10 Closest Megacities to London | 0 | - | 4.90 | 17,611 |
| Biggest Countries in Europe in 1700 | 0 | - | 4.73 | 58,285 |
| Europe by Borders in 30 Seconds | 0 | - | 4.98 | 426,423 |
| History of Austria | 0 | - | 4.70 | 17,794 |
| Geography of the French Empire | 0 | - | 4.45 | 26,991 |
| The French Revolution | 0 | - | 4.46 | 23,856 |
| Biggest Cities in Germany in 1910 | 0 | - | 4.41 | 23,422 |
| The Vikings! | 0 | - | 4.46 | 28,282 |
| Name the English Monarchs | 0 | - | 4.92 | 499,908 |
| History of France | 0 | - | 4.59 | 56,569 |
| Modern Day Countries of the Dutch Empire on a Map | 0 | - | 4.86 | 60,620 |
| Modern Day Countries of the Spanish Empire on a Map | 0 | - | 4.95 | 85,804 |
| Wives of King Henry VIII | 0 | - | 4.55 | 53,257 |
| Countries the UK Declared War On | 0 | - | 4.61 | 122,072 |
| Geography of the British Empire | 0 | - | 4.48 | 39,571 |
| Malta Country Quiz | 0 | - | 4.81 | 30,919 |
| Countries That Use the Euro | 0 | - | 4.95 | 103,831 |
| Europe Cities Map Quiz | 0 | - | 4.99 | 363,131 |
| 10 Easternmost Countries in Europe | 0 | - | 4.89 | 114,233 |
| The Only European Country ... | 0 | - | 4.91 | 214,998 |
| European Countries NOT in NATO | 0 | - | 4.90 | 60,242 |
| Letters of the Greek Alphabet | 0 | - | 4.97 | 644,346 |
| Name that Greek Letter | 0 | - | 4.93 | 322,465 |
| History of The Netherlands | 0 | - | 4.46 | 17,352 |
| History of Russia Quiz | 0 | - | 4.49 | 31,837 |
| The Trojan War | 0 | - | 4.83 | 39,550 |
| Greek Mythology General Knowledge #1 | 0 | - | 4.85 | 111,109 |
| Ancient Roman Trivia #1 | 0 | - | 4.85 | 84,260 |
| Roman Emperors | 0 | - | 4.95 | 119,168 |
| Anglo-Saxon and Viking Kings of England | 0 | - | 4.74 | 12,147 |
| Flags of Europe Quiz | 0 | - | 4.99 | 1,233,858 |
| Countries of Europe - One Minute Sprint | 0 | - | 4.94 | 1,323,149 |
| 10 Biggest European Countries by Area | 0 | - | 4.99 | 192,100 |
| 10 Westernmost Countries in Europe | 0 | - | 4.96 | 150,671 |
| Top 10 Languages Spoken in Europe | 0 | - | 4.96 | 217,285 |
| European Landmarks Map Quiz | 0 | - | 4.97 | 86,737 |
| Countries of Europe with an Empty Map | 0 | - | 5.00 | 309,193 |
| All First-Level Subdivisions of Europe on a Map | 0 | - | 4.98 | 169,319 |
| Countries with Territory in the Balkans | 0 | - | 4.96 | 88,687 |
| Eastern Europe Map Quiz | 0 | - | 4.91 | 127,502 |
| Slavic Countries | 0 | - | 4.96 | 111,203 |
| French History Multiple Choice | 0 | - | 4.55 | 32,935 |
| Germany Multiple Choice | 0 | - | 4.84 | 54,186 |
| History of Germany | 0 | - | 4.39 | 52,713 |
| 101 Figures from Greek Mythology | 0 | - | 4.99 | 125,002 |
| History of Spain | 0 | - | 4.29 | 21,042 |
| Anglo-Saxon Kingdoms of England | 0 | - | 4.60 | 25,721 |
| Giant Great Britain Millennium Quiz | 0 | - | 4.78 | 20,110 |
| "Big Five" European Soccer Champions Since 2000 | 0 | - | 4.97 | 352,319 |
| Regions of France | 0 | - | 4.77 | 119,887 |
| France Immigration by Country | 0 | - | 4.72 | 76,162 |
| Largest Islands of Greece | 0 | - | 4.59 | 47,700 |
| Olympian Gods Quiz | 0 | - | 4.96 | 498,198 |
| Ancient Greek Words | 0 | - | 4.93 | 111,060 |
| Provinces of the Netherlands | 0 | - | 4.80 | 41,033 |
| 100 Greatest Britons Quiz | 0 | - | 4.41 | 48,143 |
| Foods in a Full English Breakfast | 0 | - | 4.46 | 102,810 |
| The UK for Americans - True or False | 0 | - | 4.43 | 58,496 |
| European Geography By Letter - P #1 | 0 | - | 4.81 | 96,601 |
| European Diaspora - Top 11 Countries | 0 | - | 4.90 | 95,311 |
| 10 European Countries with the Most Tourists | 0 | - | 4.98 | 136,870 |
| Three Band Flags of Europe | 0 | - | 4.98 | 192,444 |
| Pixelated Europe Map | 0 | - | 4.88 | 122,205 |
| Monarchies of Europe | 0 | - | 4.90 | 97,667 |
| European Countries with One Border | 0 | - | 4.97 | 182,071 |
| European Countries with the Fewest Borders | 0 | - | 4.97 | 178,936 |
| European Geography By Letter - B #2 | 0 | - | 4.84 | 76,654 |
| Federal Subjects of Russia | 0 | - | 4.94 | 145,118 |
| Countries Formerly in Yugoslavia | 0 | - | 4.95 | 124,502 |
| French Inventions | 0 | - | 4.08 | 13,875 |
| History of Paris | 0 | - | 4.24 | 13,628 |
| States of the Holy Roman Empire in 1356 | 0 | - | 4.97 | 73,096 |
| Embarrassing Chapters in Italian History | 0 | - | 4.24 | 12,066 |
| Two Letter Roman Numerals | 0 | - | 4.97 | 55,822 |
| American to British Word Translation | 0 | - | 4.13 | 138,184 |
| Languages of the United Kingdom | 0 | - | 4.13 | 40,800 |
| Counties of England Map Quiz | 0 | - | 4.97 | 306,598 |
| British Geography Multiple Choice | 0 | - | 4.49 | 43,254 |
| Champions League Winners | 0 | - | 4.92 | 1,000,344 |
| Countries of the Mongol Empire on a Map | 0 | - | 4.99 | 106,276 |
| Top 10 Coldest European Countries | 0 | - | 4.94 | 192,595 |
| Top 10 Hottest European Countries | 0 | - | 4.89 | 126,451 |
| Category Elimination - European Geography #1 | 0 | - | 4.98 | 231,648 |
| European Map without 10 Random Countries | 0 | - | 4.97 | 275,639 |
| Category Elimination - European Geography #2 | 0 | - | 4.99 | 165,995 |
| Name a Valid European Country #1 | 0 | - | 4.99 | 258,501 |
| Name a Valid European Country #2 | 0 | - | 4.94 | 113,834 |
| Russia Country Quiz | 0 | - | 4.85 | 114,008 |
| Countries That Border Russia | 0 | - | 4.98 | 460,211 |
| Croatia Country Quiz | 0 | - | 4.83 | 43,063 |
| Bosnia and Herzegovina Country Quiz | 0 | - | 4.86 | 35,179 |
| France Cities Map Quiz | 0 | - | 4.96 | 165,648 |
| Departments of France | 0 | - | 4.93 | 53,246 |
| Countries Bordering France | 0 | - | 4.83 | 401,003 |
| Germany Country Quiz | 0 | - | 4.82 | 157,125 |
| Germany Cities Map Quiz | 0 | - | 4.87 | 125,510 |
| Countries Bordering Germany | 0 | - | 4.99 | 367,924 |
| Italy Country Quiz | 0 | - | 4.82 | 122,629 |
| Regions of Italy Map Quiz | 0 | - | 4.96 | 148,773 |
| Italy Cities Map Quiz | 0 | - | 4.97 | 151,406 |
| Countries Surrounding Rome | 0 | - | 4.97 | 49,425 |
| Roman Numeral Decoding Quiz | 0 | - | 4.94 | 435,004 |
| Spain Cities Map Quiz | 0 | - | 4.87 | 96,368 |
| Regions of Spain Map Quiz | 0 | - | 4.95 | 185,005 |
| Modern-Day Countries of the British Empire in 1921 | 0 | - | 4.99 | 116,790 |
| Former Dominions of the British Empire | 0 | - | 4.27 | 24,129 |
| England or Wales? | 0 | - | 4.94 | 45,474 |
| All UEFA Champions League Teams Ever | 0 | - | 4.85 | 129,175 |
| European Countries by First 2 Letters | 0 | - | 4.95 | 527,608 |
| European Countries with the Fewest Overnight Visitors | 0 | - | 4.78 | 41,626 |
| Top 20 Football Clubs in Europe | 0 | - | 4.48 | 113,785 |
| The Only Remaining European Country . . . | 0 | - | 4.41 | 63,969 |
| Ancient Greek Trivia | 0 | - | 4.62 | 66,863 |
| Geography of Ancient Greece | 0 | - | 4.69 | 31,833 |
| Figures from Greek Mythology | 0 | - | 4.91 | 185,764 |
| Countries Italy Declared War On | 0 | - | 4.75 | 43,126 |
| Canary Islands | 0 | - | 4.61 | 17,432 |
| Switzerland Immigration by Country | 0 | - | 4.70 | 29,339 |
| British Spellings | 0 | - | 4.07 | 99,345 |
| British Groups of Things | 0 | - | 4.25 | 82,760 |
| British Acronyms | 0 | - | 4.39 | 45,694 |
| United Kingdom Decoder | 0 | - | 4.29 | 39,989 |
| Biggest Immigrant Groups by Decade in the UK | 0 | - | 4.63 | 24,772 |
| Geography of Scotland | 0 | - | 4.63 | 21,540 |
| Medieval English History | 0 | - | 4.53 | 43,388 |
| U.S. Presidents Quiz | 0 | - | 5.00 | 3,672,461 |
| Deadliest U.S. Wars | 0 | - | 4.89 | 189,710 |
| Countries That Touch the Adriatic Sea | 0 | - | 4.96 | 70,918 |
| Top 10 European Countries by Coastline | 0 | - | 4.87 | 138,070 |
| 100 Longest Rivers in Europe - with a Map | 0 | - | 4.94 | 65,096 |
| Category Elimination - European Countries #1 | 0 | - | 4.89 | 89,427 |
| Countries that Border Poland | 0 | - | 4.99 | 171,745 |
| Non-Bordering Countries Closest to Russia | 0 | - | 4.91 | 82,547 |
| Countries With the Most Russian Speakers | 0 | - | 4.97 | 99,444 |
| Countries that Border Hungary | 0 | - | 4.98 | 103,915 |
| North Macedonia Country Quiz | 0 | - | 4.81 | 27,716 |
| Moldova Country Quiz | 0 | - | 4.81 | 30,644 |
| Countries Bordering Serbia | 0 | - | 4.96 | 92,039 |
| French Geography Quiz #1 | 0 | - | 4.89 | 34,623 |
| Andorra Country Quiz | 0 | - | 4.90 | 31,520 |
| Countries Bordering Austria | 0 | - | 4.97 | 118,010 |
| Countries that Visit France the Most | 0 | - | 4.85 | 45,686 |
| Countries Closest to Metropolitan France | 0 | - | 4.89 | 71,961 |
| Geography of Germany | 0 | - | 4.35 | 17,132 |
| Countries With the Most German Speakers | 0 | - | 4.89 | 95,302 |
| Greek Mythology General Knowledge #2 | 0 | - | 4.59 | 73,220 |
| Ancient Greece - Multiple Choice | 0 | - | 4.54 | 41,530 |
| Counties of Ireland | 0 | - | 4.92 | 193,938 |
| Italian Inventions | 0 | - | 3.81 | 18,423 |
| Countries Bordering Italy | 0 | - | 4.94 | 100,623 |
| Countries Closest to Italy | 0 | - | 4.97 | 196,849 |
| Ancient Roman Trivia #2 | 0 | - | 4.57 | 38,616 |
| Geography of the Roman Empire | 0 | - | 4.56 | 51,774 |
| Roman Names for Places | 0 | - | 4.62 | 58,040 |
| Byzantine History | 0 | - | 4.91 | 28,691 |
| Geography of the Spanish Empire | 0 | - | 4.49 | 37,075 |
| Countries Closest to Spain | 0 | - | 4.96 | 226,179 |
| British to American Word Translation | 0 | - | 3.74 | 254,895 |
| British Foods by Description | 0 | - | 3.94 | 48,289 |
| British and American Word Differences | 0 | - | 2.63 | 46,821 |
| English Inventions #1 | 0 | - | 3.15 | 23,533 |
| English Inventions #2 | 0 | - | 4.00 | 8,680 |
| British Geography Quiz #2 | 0 | - | 4.29 | 27,544 |
| Counties of the UK and Ireland | 0 | - | 4.98 | 129,401 |
| The Reign of Queen Elizabeth I | 0 | - | 4.53 | 31,677 |
| Houses of British Monarchs | 0 | - | 4.53 | 65,456 |
| British History Multiple Choice #1 | 0 | - | 4.46 | 55,036 |
| British History Multiple Choice #2 | 0 | - | 4.42 | 37,891 |
| Prime Ministers of the UK | 0 | - | 4.96 | 436,449 |
| World Capitals Closest to London | 0 | - | 4.87 | 110,020 |
| 50 Busiest Air Routes from London | 0 | - | 4.87 | 95,991 |
| Bridges of London | 0 | - | 4.17 | 10,073 |
| British Sport Trivia | 0 | - | 4.37 | 20,405 |
| 2025–2026 Football League Teams | 0 | - | 4.93 | 398,914 |
| Famous Welsh People | 0 | - | 4.21 | 9,794 |
| Liechtenstein Country Quiz | 0 | - | 4.64 | 26,952 |
| San Marino Country Quiz | 0 | - | 4.70 | 28,838 |
| African Countries by First 2 Letters | 0 | - | 4.96 | 267,318 |
| Colonies of Africa with a Map | 0 | - | 4.78 | 54,172 |
