| States of the German Confederation in 1848 | 0 | - | 4.89 | 31,862 |
| Counties of England | 0 | - | 4.97 | 794,510 |
| History of Italy | 0 | - | 4.55 | 31,930 |
| Geography of the Dutch Empire | 0 | - | 4.61 | 34,606 |
| Countries of the Spanish Empire | 0 | - | 4.52 | 77,156 |
| Invasions of Great Britain | 0 | - | 4.51 | 59,783 |
| Europe Map Quiz | 0 | - | 5.00 | 4,754,401 |
| Countries of Europe in 1815 With a Map | 0 | - | 4.99 | 149,851 |
| Countries of Europe in 1848 | 0 | - | 4.99 | 76,094 |
| Countries of Europe in 1870 with a Map | 0 | - | 4.95 | 64,246 |
| Every Country of Europe Since 1815 With a Map | 0 | - | 4.98 | 70,679 |
| Countries of Europe in 1360 with a Map | 0 | - | 4.99 | 56,572 |
| Regions of France Map Quiz | 0 | - | 4.97 | 144,089 |
| States of Germany Map Quiz | 0 | - | 4.91 | 132,500 |
| States of Germany | 0 | - | 4.96 | 151,776 |
| Germany Immigration by Country | 0 | - | 4.85 | 80,854 |
| Regions of Italy | 0 | - | 4.92 | 75,505 |
| Netherlands Immigration by Country | 0 | - | 4.93 | 51,776 |
| Regions of Spain Quiz | 0 | - | 4.90 | 113,596 |
| Cantons of Switzerland | 0 | - | 4.98 | 50,970 |
| Countries and Territories of the United Kingdom | 0 | - | 4.89 | 93,517 |
| 10 Closest Megacities to London | 0 | - | 4.90 | 17,655 |
| Biggest Countries in Europe in 1700 | 0 | - | 4.73 | 58,380 |
| Europe by Borders in 30 Seconds | 0 | - | 4.98 | 427,362 |
| History of Austria | 0 | - | 4.70 | 17,831 |
| Geography of the French Empire | 0 | - | 4.45 | 27,019 |
| The French Revolution | 0 | - | 4.46 | 23,897 |
| Biggest Cities in Germany in 1910 | 0 | - | 4.41 | 23,460 |
| The Vikings! | 0 | - | 4.46 | 28,317 |
| Name the English Monarchs | 0 | - | 4.91 | 501,302 |
| History of France | 0 | - | 4.59 | 56,800 |
| Modern Day Countries of the Dutch Empire on a Map | 0 | - | 4.86 | 60,894 |
| Modern Day Countries of the Spanish Empire on a Map | 0 | - | 4.95 | 86,065 |
| Wives of King Henry VIII | 0 | - | 4.55 | 53,303 |
| Countries the UK Declared War On | 0 | - | 4.61 | 122,277 |
| Geography of the British Empire | 0 | - | 4.48 | 39,627 |
| Malta Country Quiz | 0 | - | 4.81 | 30,993 |
| Countries That Use the Euro | 0 | - | 4.95 | 104,458 |
| Europe Cities Map Quiz | 0 | - | 4.99 | 363,880 |
| 10 Easternmost Countries in Europe | 0 | - | 4.89 | 114,765 |
| The Only European Country ... | 0 | - | 4.91 | 215,900 |
| European Countries NOT in NATO | 0 | - | 4.90 | 60,706 |
| Letters of the Greek Alphabet | 0 | - | 4.97 | 645,918 |
| Name that Greek Letter | 0 | - | 4.93 | 323,031 |
| History of The Netherlands | 0 | - | 4.46 | 17,403 |
| History of Russia Quiz | 0 | - | 4.49 | 31,878 |
| The Trojan War | 0 | - | 4.83 | 39,638 |
| Greek Mythology General Knowledge #1 | 0 | - | 4.85 | 111,498 |
| Ancient Roman Trivia #1 | 0 | - | 4.85 | 84,398 |
| Roman Emperors | 0 | - | 4.95 | 119,625 |
| Anglo-Saxon and Viking Kings of England | 0 | - | 4.74 | 12,181 |
| Flags of Europe Quiz | 0 | - | 4.99 | 1,239,379 |
| Countries of Europe - One Minute Sprint | 0 | - | 4.94 | 1,325,848 |
| 10 Biggest European Countries by Area | 0 | - | 4.99 | 192,390 |
| 10 Westernmost Countries in Europe | 0 | - | 4.96 | 150,936 |
| Top 10 Languages Spoken in Europe | 0 | - | 4.96 | 218,080 |
| European Landmarks Map Quiz | 0 | - | 4.97 | 86,954 |
| Countries of Europe with an Empty Map | 0 | - | 5.00 | 309,905 |
| All First-Level Subdivisions of Europe on a Map | 0 | - | 4.98 | 170,460 |
| Countries with Territory in the Balkans | 0 | - | 4.96 | 88,962 |
| Eastern Europe Map Quiz | 0 | - | 4.91 | 127,691 |
| Slavic Countries | 0 | - | 4.96 | 111,453 |
| French History Multiple Choice | 0 | - | 4.55 | 32,995 |
| Germany Multiple Choice | 0 | - | 4.84 | 54,278 |
| History of Germany | 0 | - | 4.39 | 52,773 |
| 101 Figures from Greek Mythology | 0 | - | 4.99 | 125,458 |
| History of Spain | 0 | - | 4.23 | 21,068 |
| Anglo-Saxon Kingdoms of England | 0 | - | 4.60 | 25,734 |
| Giant Great Britain Millennium Quiz | 0 | - | 4.78 | 20,127 |
| "Big Five" European Soccer Champions Since 2000 | 0 | - | 4.97 | 354,043 |
| Regions of France | 0 | - | 4.75 | 120,361 |
| France Immigration by Country | 0 | - | 4.70 | 76,377 |
| Largest Islands of Greece | 0 | - | 4.59 | 47,851 |
| Olympian Gods Quiz | 0 | - | 4.96 | 499,430 |
| Ancient Greek Words | 0 | - | 4.93 | 111,304 |
| Provinces of the Netherlands | 0 | - | 4.80 | 41,204 |
| 100 Greatest Britons Quiz | 0 | - | 4.41 | 48,230 |
| Foods in a Full English Breakfast | 0 | - | 4.46 | 103,044 |
| The UK for Americans - True or False | 0 | - | 4.43 | 58,574 |
| European Diaspora - Top 11 Countries | 0 | - | 4.90 | 95,645 |
| 10 European Countries with the Most Tourists | 0 | - | 4.98 | 137,205 |
| Three Band Flags of Europe | 0 | - | 4.98 | 192,870 |
| Pixelated Europe Map | 0 | - | 4.88 | 122,470 |
| Monarchies of Europe | 0 | - | 4.90 | 97,923 |
| European Countries with One Border | 0 | - | 4.97 | 182,466 |
| European Countries with the Fewest Borders | 0 | - | 4.97 | 179,277 |
| European Geography By Letter - B #2 | 0 | - | 4.85 | 77,874 |
| Federal Subjects of Russia | 0 | - | 4.95 | 146,209 |
| Countries Formerly in Yugoslavia | 0 | - | 4.95 | 124,697 |
| French Inventions | 0 | - | 4.08 | 13,889 |
| History of Paris | 0 | - | 4.24 | 13,635 |
| States of the Holy Roman Empire in 1356 | 0 | - | 4.97 | 73,497 |
| Embarrassing Chapters in Italian History | 0 | - | 4.24 | 12,084 |
| Two Letter Roman Numerals | 0 | - | 4.97 | 55,983 |
| American to British Word Translation | 0 | - | 4.14 | 138,705 |
| Languages of the United Kingdom | 0 | - | 4.13 | 40,852 |
| Counties of England Map Quiz | 0 | - | 4.97 | 306,987 |
| British Geography Multiple Choice | 0 | - | 4.49 | 43,292 |
| Champions League Winners | 0 | - | 4.92 | 1,003,469 |
| Countries of the Mongol Empire on a Map | 0 | - | 4.99 | 106,578 |
| Top 10 Coldest European Countries | 0 | - | 4.94 | 192,844 |
| Top 10 Hottest European Countries | 0 | - | 4.88 | 126,748 |
| Category Elimination - European Geography #1 | 0 | - | 4.98 | 232,501 |
| European Map without 10 Random Countries | 0 | - | 4.97 | 276,227 |
| Category Elimination - European Geography #2 | 0 | - | 4.99 | 166,596 |
| Name a Valid European Country #1 | 0 | - | 4.99 | 259,795 |
| Name a Valid European Country #2 | 0 | - | 4.94 | 114,284 |
| Russia Country Quiz | 0 | - | 4.85 | 114,242 |
| Countries That Border Russia | 0 | - | 4.98 | 461,016 |
| Croatia Country Quiz | 0 | - | 4.83 | 43,217 |
| Bosnia and Herzegovina Country Quiz | 0 | - | 4.86 | 35,281 |
| France Cities Map Quiz | 0 | - | 4.96 | 166,398 |
| Departments of France | 0 | - | 4.93 | 53,720 |
| Countries Bordering France | 0 | - | 4.83 | 401,792 |
| Germany Country Quiz | 0 | - | 4.82 | 157,525 |
| Germany Cities Map Quiz | 0 | - | 4.87 | 125,845 |
| Countries Bordering Germany | 0 | - | 4.99 | 368,522 |
| Italy Country Quiz | 0 | - | 4.82 | 123,153 |
| Regions of Italy Map Quiz | 0 | - | 4.96 | 149,071 |
| Italy Cities Map Quiz | 0 | - | 4.97 | 151,789 |
| Countries Surrounding Rome | 0 | - | 4.97 | 49,511 |
| Roman Numeral Decoding Quiz | 0 | - | 4.94 | 435,994 |
| Spain Cities Map Quiz | 0 | - | 4.87 | 96,638 |
| Regions of Spain Map Quiz | 0 | - | 4.95 | 185,331 |
| Modern-Day Countries of the British Empire in 1921 | 0 | - | 4.99 | 117,178 |
| Former Dominions of the British Empire | 0 | - | 4.27 | 24,157 |
| England or Wales? | 0 | - | 4.94 | 45,589 |
| All UEFA Champions League Teams Ever | 0 | - | 4.85 | 129,683 |
| European Countries by First 2 Letters | 0 | - | 4.95 | 528,572 |
| European Countries with the Fewest Overnight Visitors | 0 | - | 4.80 | 41,640 |
| Top 20 Football Clubs in Europe | 0 | - | 4.48 | 114,317 |
| The Only Remaining European Country . . . | 0 | - | 4.41 | 64,142 |
| Ancient Greek Trivia | 0 | - | 4.62 | 66,929 |
| Geography of Ancient Greece | 0 | - | 4.69 | 31,874 |
| Figures from Greek Mythology | 0 | - | 4.91 | 186,361 |
| Countries Italy Declared War On | 0 | - | 4.75 | 43,236 |
| Canary Islands | 0 | - | 4.62 | 17,458 |
| Switzerland Immigration by Country | 0 | - | 4.70 | 29,577 |
| British Spellings | 0 | - | 4.06 | 99,399 |
| British Groups of Things | 0 | - | 4.25 | 82,828 |
| British Acronyms | 0 | - | 4.39 | 45,751 |
| United Kingdom Decoder | 0 | - | 4.29 | 40,012 |
| Biggest Immigrant Groups by Decade in the UK | 0 | - | 4.63 | 24,994 |
| English Monarchs in Order by First Letter | 0 | - | 4.38 | 31,649 |
| Geography of Scotland | 0 | - | 4.63 | 21,585 |
| Medieval English History | 0 | - | 4.53 | 43,450 |
| U.S. Presidents Quiz | 0 | - | 5.00 | 3,686,945 |
| Deadliest U.S. Wars | 0 | - | 4.89 | 190,471 |
| Countries That Touch the Adriatic Sea | 0 | - | 4.96 | 71,028 |
| Top 10 European Countries by Coastline | 0 | - | 4.87 | 138,266 |
| 100 Longest Rivers in Europe - with a Map | 0 | - | 4.94 | 65,331 |
| Category Elimination - European Countries #1 | 0 | - | 4.89 | 89,725 |
| Countries that Border Poland | 0 | - | 4.99 | 172,022 |
| Non-Bordering Countries Closest to Russia | 0 | - | 4.91 | 82,701 |
| Countries With the Most Russian Speakers | 0 | - | 4.97 | 100,122 |
| Countries that Border Hungary | 0 | - | 4.98 | 104,075 |
| North Macedonia Country Quiz | 0 | - | 4.81 | 27,790 |
| Moldova Country Quiz | 0 | - | 4.82 | 30,727 |
| Countries Bordering Serbia | 0 | - | 4.96 | 92,226 |
| French Geography Quiz #1 | 0 | - | 4.89 | 34,704 |
| Andorra Country Quiz | 0 | - | 4.90 | 31,610 |
| Countries Bordering Austria | 0 | - | 4.97 | 118,167 |
| Countries that Visit France the Most | 0 | - | 4.85 | 45,776 |
| Countries Closest to Metropolitan France | 0 | - | 4.89 | 72,077 |
| Geography of Germany | 0 | - | 4.35 | 17,157 |
| Countries With the Most German Speakers | 0 | - | 4.89 | 96,001 |
| Greek Mythology General Knowledge #2 | 0 | - | 4.59 | 73,438 |
| Ancient Greece - Multiple Choice | 0 | - | 4.54 | 41,599 |
| Counties of Ireland | 0 | - | 4.92 | 194,552 |
| Italian Inventions | 0 | - | 3.81 | 18,432 |
| Countries Bordering Italy | 0 | - | 4.94 | 100,737 |
| Countries Closest to Italy | 0 | - | 4.97 | 197,669 |
| Ancient Roman Trivia #2 | 0 | - | 4.57 | 38,683 |
| Geography of the Roman Empire | 0 | - | 4.56 | 51,847 |
| Roman Names for Places | 0 | - | 4.62 | 58,161 |
| Byzantine History | 0 | - | 4.91 | 28,750 |
| Geography of the Spanish Empire | 0 | - | 4.49 | 37,112 |
| Countries Closest to Spain | 0 | - | 4.96 | 226,557 |
| British to American Word Translation | 0 | - | 3.74 | 254,986 |
| British Foods by Description | 0 | - | 3.94 | 48,311 |
| British and American Word Differences | 0 | - | 2.63 | 46,854 |
| English Inventions #1 | 0 | - | 3.15 | 23,551 |
| English Inventions #2 | 0 | - | 4.00 | 8,690 |
| British Geography Quiz #2 | 0 | - | 4.29 | 27,576 |
| Counties of the UK and Ireland | 0 | - | 4.98 | 130,065 |
| The Reign of Queen Elizabeth I | 0 | - | 4.53 | 31,733 |
| Houses of British Monarchs | 0 | - | 4.53 | 65,560 |
| British History Multiple Choice #1 | 0 | - | 4.46 | 55,093 |
| British History Multiple Choice #2 | 0 | - | 4.42 | 37,923 |
| Prime Ministers of the UK | 0 | - | 4.95 | 437,654 |
| World Capitals Closest to London | 0 | - | 4.87 | 110,211 |
| 50 Busiest Air Routes from London | 0 | - | 4.87 | 96,661 |
| Bridges of London | 0 | - | 4.17 | 10,090 |
| British Sport Trivia | 0 | - | 4.37 | 20,433 |
| 2025–2026 Football League Teams | 0 | - | 4.93 | 400,134 |
| Famous Welsh People | 0 | - | 4.29 | 11,349 |
| Liechtenstein Country Quiz | 0 | - | 4.64 | 27,021 |
| San Marino Country Quiz | 0 | - | 4.70 | 28,925 |
| African Countries by First 2 Letters | 0 | - | 4.96 | 267,812 |
| Colonies of Africa with a Map | 0 | - | 4.78 | 54,324 |
