| States of the German Confederation in 1848 | 0 | - | 4.90 | 32,337 |
| Counties of England | 0 | - | 4.97 | 801,188 |
| History of Italy | 0 | - | 4.55 | 32,107 |
| Geography of the Dutch Empire | 0 | - | 4.62 | 34,781 |
| Countries of the Spanish Empire | 0 | - | 4.52 | 77,378 |
| Invasions of Great Britain | 0 | - | 4.51 | 60,038 |
| Europe Map Quiz | 0 | - | 5.00 | 4,780,372 |
| Countries of Europe in 1815 With a Map | 0 | - | 4.99 | 151,074 |
| Countries of Europe in 1848 | 0 | - | 4.98 | 84,641 |
| Countries of Europe in 1870 with a Map | 0 | - | 4.95 | 65,476 |
| Every Country of Europe Since 1815 With a Map | 0 | - | 4.98 | 71,612 |
| Countries of Europe in 1360 with a Map | 0 | - | 4.99 | 57,373 |
| Regions of France Map Quiz | 0 | - | 4.97 | 145,342 |
| States of Germany Map Quiz | 0 | - | 4.92 | 133,516 |
| States of Germany | 0 | - | 4.95 | 153,968 |
| Germany Immigration by Country | 0 | - | 4.86 | 81,523 |
| Regions of Italy | 0 | - | 4.92 | 76,673 |
| Netherlands Immigration by Country | 0 | - | 4.93 | 52,645 |
| Regions of Spain Quiz | 0 | - | 4.90 | 114,992 |
| Cantons of Switzerland | 0 | - | 4.98 | 51,600 |
| Countries and Territories of the United Kingdom | 0 | - | 4.90 | 94,370 |
| 10 Closest Megacities to London | 0 | - | 4.90 | 17,805 |
| Biggest Countries in Europe in 1700 | 0 | - | 4.73 | 58,688 |
| Europe by Borders in 30 Seconds | 0 | - | 4.98 | 430,145 |
| Geography of the French Empire | 0 | - | 4.45 | 27,193 |
| The French Revolution | 0 | - | 4.47 | 24,108 |
| Biggest Cities in Germany in 1910 | 0 | - | 4.41 | 23,539 |
| The Vikings! | 0 | - | 4.46 | 28,390 |
| The Portuguese Empire | 0 | - | 4.58 | 12,095 |
| Name the English Monarchs | 0 | - | 4.91 | 505,337 |
| History of France | 0 | - | 4.61 | 57,460 |
| Modern Day Countries of the Dutch Empire on a Map | 0 | - | 4.86 | 61,504 |
| Modern Day Countries of the Spanish Empire on a Map | 0 | - | 4.95 | 86,711 |
| Wives of King Henry VIII | 0 | - | 4.55 | 53,435 |
| Countries the UK Declared War On | 0 | - | 4.55 | 123,108 |
| Geography of the British Empire | 0 | - | 4.48 | 39,813 |
| Malta Country Quiz | 0 | - | 4.81 | 31,198 |
| Countries That Use the Euro | 0 | - | 4.95 | 106,249 |
| Europe Cities Map Quiz | 0 | - | 4.99 | 365,692 |
| 10 Easternmost Countries in Europe | 0 | - | 4.87 | 116,713 |
| The Only European Country ... | 0 | - | 4.91 | 218,317 |
| European Countries NOT in NATO | 0 | - | 4.90 | 62,129 |
| Letters of the Greek Alphabet | 0 | - | 4.97 | 650,607 |
| Name that Greek Letter | 0 | - | 4.93 | 324,647 |
| History of The Netherlands | 0 | - | 4.46 | 17,526 |
| History of Russia Quiz | 0 | - | 4.47 | 31,984 |
| The Trojan War | 0 | - | 4.83 | 39,929 |
| Greek Mythology General Knowledge #1 | 0 | - | 4.85 | 112,663 |
| Ancient Roman Trivia #1 | 0 | - | 4.85 | 85,472 |
| Roman Emperors | 0 | - | 4.95 | 120,866 |
| Anglo-Saxon and Viking Kings of England | 0 | - | 4.74 | 12,307 |
| Flags of Europe Quiz | 0 | - | 4.99 | 1,253,608 |
| Countries of Europe - One Minute Sprint | 0 | - | 4.94 | 1,333,567 |
| 10 Biggest European Countries by Area | 0 | - | 4.99 | 193,274 |
| 10 Westernmost Countries in Europe | 0 | - | 4.96 | 151,827 |
| Top 10 Languages Spoken in Europe | 0 | - | 4.96 | 220,190 |
| European Landmarks Map Quiz | 0 | - | 4.97 | 87,602 |
| Countries of Europe with an Empty Map | 0 | - | 5.00 | 312,148 |
| All First-Level Subdivisions of Europe on a Map | 0 | - | 4.99 | 174,891 |
| Countries with Territory in the Balkans | 0 | - | 4.96 | 89,923 |
| Eastern Europe Map Quiz | 0 | - | 4.91 | 128,638 |
| Slavic Countries | 0 | - | 4.96 | 112,173 |
| French History Multiple Choice | 0 | - | 4.55 | 33,176 |
| Germany Multiple Choice | 0 | - | 4.84 | 54,614 |
| History of Germany | 0 | - | 4.39 | 52,943 |
| 101 Figures from Greek Mythology | 0 | - | 4.99 | 127,114 |
| History of Spain | 0 | - | 4.23 | 21,145 |
| Anglo-Saxon Kingdoms of England | 0 | - | 4.60 | 25,808 |
| Giant Great Britain Millennium Quiz | 0 | - | 4.78 | 20,212 |
| "Big Five" European Soccer Champions Since 2000 | 0 | - | 4.97 | 360,016 |
| Regions of France | 0 | - | 4.70 | 121,716 |
| France Immigration by Country | 0 | - | 4.70 | 76,824 |
| Largest Islands of Greece | 0 | - | 4.59 | 48,315 |
| Olympian Gods Quiz | 0 | - | 4.96 | 502,933 |
| Ancient Greek Words | 0 | - | 4.93 | 112,223 |
| Provinces of the Netherlands | 0 | - | 4.80 | 41,629 |
| 100 Greatest Britons Quiz | 0 | - | 4.41 | 48,379 |
| Foods in a Full English Breakfast | 0 | - | 4.46 | 103,644 |
| The UK for Americans - True or False | 0 | - | 4.43 | 58,762 |
| European Geography By Letter - P #1 | 0 | - | 4.81 | 98,553 |
| European Diaspora - Top 11 Countries | 0 | - | 4.90 | 96,310 |
| 10 European Countries with the Most Tourists | 0 | - | 4.98 | 138,225 |
| Three Band Flags of Europe | 0 | - | 4.98 | 194,185 |
| Pixelated Europe Map | 0 | - | 4.88 | 123,274 |
| Monarchies of Europe | 0 | - | 4.90 | 98,632 |
| European Countries with One Border | 0 | - | 4.97 | 183,494 |
| European Countries with the Fewest Borders | 0 | - | 4.97 | 180,238 |
| European Geography By Letter - B #2 | 0 | - | 4.87 | 88,246 |
| Federal Subjects of Russia | 0 | - | 4.95 | 148,869 |
| Countries Formerly in Yugoslavia | 0 | - | 4.95 | 125,315 |
| French Inventions | 0 | - | 4.10 | 13,918 |
| History of Paris | 0 | - | 4.24 | 13,667 |
| States of the Holy Roman Empire in 1356 | 0 | - | 4.98 | 74,968 |
| Embarrassing Chapters in Italian History | 0 | - | 4.24 | 12,145 |
| Two Letter Roman Numerals | 0 | - | 4.97 | 56,409 |
| American to British Word Translation | 0 | - | 4.14 | 139,530 |
| Languages of the United Kingdom | 0 | - | 4.14 | 41,016 |
| Counties of England Map Quiz | 0 | - | 4.97 | 308,652 |
| British Geography Multiple Choice | 0 | - | 4.49 | 43,418 |
| Champions League Winners | 0 | - | 4.92 | 1,013,006 |
| Top 10 Coldest European Countries | 0 | - | 4.94 | 193,597 |
| Top 10 Hottest European Countries | 0 | - | 4.88 | 127,547 |
| Category Elimination - European Geography #1 | 0 | - | 4.98 | 235,105 |
| European Map without 10 Random Countries | 0 | - | 4.97 | 278,399 |
| Category Elimination - European Geography #2 | 0 | - | 4.99 | 168,404 |
| Name a Valid European Country #1 | 0 | - | 4.99 | 263,666 |
| Name a Valid European Country #2 | 0 | - | 4.94 | 115,584 |
| Russia Country Quiz | 0 | - | 4.83 | 115,133 |
| Countries That Border Russia | 0 | - | 4.98 | 463,877 |
| Croatia Country Quiz | 0 | - | 4.83 | 43,615 |
| Bosnia and Herzegovina Country Quiz | 0 | - | 4.86 | 35,503 |
| Andorra Country Quiz | 0 | - | 4.91 | 31,872 |
| France Cities Map Quiz | 0 | - | 4.96 | 167,508 |
| Departments of France | 0 | - | 4.93 | 54,848 |
| Countries Bordering France | 0 | - | 4.83 | 404,334 |
| Germany Country Quiz | 0 | - | 4.83 | 158,558 |
| Germany Cities Map Quiz | 0 | - | 4.87 | 126,891 |
| Countries Bordering Germany | 0 | - | 4.99 | 371,307 |
| Regions of Italy Map Quiz | 0 | - | 4.96 | 150,010 |
| Italy Cities Map Quiz | 0 | - | 4.97 | 152,869 |
| Countries Surrounding Rome | 0 | - | 4.97 | 49,696 |
| Roman Numeral Decoding Quiz | 0 | - | 4.94 | 439,010 |
| Spain Cities Map Quiz | 0 | - | 4.87 | 97,315 |
| Regions of Spain Map Quiz | 0 | - | 4.95 | 186,576 |
| Modern-Day Countries of the British Empire in 1921 | 0 | - | 4.99 | 118,459 |
| Former Dominions of the British Empire | 0 | - | 4.27 | 24,248 |
| England or Wales? | 0 | - | 4.94 | 45,891 |
| All UEFA Champions League Teams Ever | 0 | - | 4.85 | 131,617 |
| Countries of the Mongol Empire on a Map | 0 | - | 4.99 | 107,329 |
| European Countries by First 2 Letters | 0 | - | 4.95 | 531,684 |
| European Countries with the Fewest Overnight Visitors | 0 | - | 4.80 | 41,699 |
| Top 20 Football Clubs in Europe | 0 | - | 4.48 | 116,251 |
| The Only Remaining European Country . . . | 0 | - | 4.41 | 64,557 |
| Ancient Greek Trivia | 0 | - | 4.62 | 67,170 |
| Geography of Ancient Greece | 0 | - | 4.69 | 31,999 |
| Most-Mentioned Characters in the Iliad | 0 | - | 4.81 | 20,919 |
| Figures from Greek Mythology | 0 | - | 4.91 | 188,340 |
| Countries Italy Declared War On | 0 | - | 4.75 | 43,557 |
| Canary Islands | 0 | - | 4.62 | 17,513 |
| Switzerland Immigration by Country | 0 | - | 4.69 | 29,951 |
| British Spellings | 0 | - | 4.06 | 99,555 |
| British Groups of Things | 0 | - | 4.25 | 82,974 |
| British Acronyms | 0 | - | 4.40 | 45,899 |
| United Kingdom Decoder | 0 | - | 4.29 | 40,085 |
| Biggest Immigrant Groups by Decade in the UK | 0 | - | 4.63 | 25,579 |
| English Monarchs in Order by First Letter | 0 | - | 4.38 | 32,056 |
| Geography of Scotland | 0 | - | 4.63 | 21,704 |
| Medieval English History | 0 | - | 4.53 | 43,618 |
| U.S. Presidents Quiz | 0 | - | 5.00 | 3,718,469 |
| Deadliest U.S. Wars | 0 | - | 4.89 | 191,564 |
| Countries That Touch the Adriatic Sea | 0 | - | 4.96 | 71,286 |
| Top 10 European Countries by Coastline | 0 | - | 4.88 | 138,625 |
| 100 Longest Rivers in Europe - with a Map | 0 | - | 4.94 | 65,774 |
| Category Elimination - European Countries #1 | 0 | - | 4.90 | 90,782 |
| Countries that Border Poland | 0 | - | 4.99 | 172,930 |
| Non-Bordering Countries Closest to Russia | 0 | - | 4.91 | 83,129 |
| Countries With the Most Russian Speakers | 0 | - | 4.97 | 102,255 |
| Countries that Border Hungary | 0 | - | 4.98 | 104,885 |
| North Macedonia Country Quiz | 0 | - | 4.81 | 27,990 |
| Moldova Country Quiz | 0 | - | 4.82 | 30,968 |
| Countries Bordering Serbia | 0 | - | 4.96 | 92,907 |
| French Geography Quiz #1 | 0 | - | 4.89 | 35,007 |
| Countries Bordering Austria | 0 | - | 4.97 | 118,831 |
| Countries that Visit France the Most | 0 | - | 4.85 | 46,067 |
| Countries Closest to Metropolitan France | 0 | - | 4.89 | 72,386 |
| Geography of Germany | 0 | - | 4.35 | 17,243 |
| Countries With the Most German Speakers | 0 | - | 4.89 | 98,062 |
| Greek Mythology General Knowledge #2 | 0 | - | 4.59 | 74,139 |
| Ancient Greece - Multiple Choice | 0 | - | 4.54 | 41,783 |
| Counties of Ireland | 0 | - | 4.92 | 196,821 |
| Italian Inventions | 0 | - | 3.81 | 18,467 |
| Countries Bordering Italy | 0 | - | 4.94 | 101,158 |
| Countries Closest to Italy | 0 | - | 4.97 | 199,045 |
| Ancient Roman Trivia #2 | 0 | - | 4.60 | 44,044 |
| Geography of the Roman Empire | 0 | - | 4.56 | 52,152 |
| Roman Names for Places | 0 | - | 4.62 | 58,605 |
| Byzantine History | 0 | - | 4.91 | 28,986 |
| Byzantine Emperors | 0 | - | 4.92 | 14,496 |
| Geography of the Spanish Empire | 0 | - | 4.49 | 37,281 |
| Countries Closest to Spain | 0 | - | 4.96 | 227,785 |
| British to American Word Translation | 0 | - | 3.74 | 255,268 |
| British Foods by Description | 0 | - | 3.94 | 48,364 |
| British and American Word Differences | 0 | - | 2.63 | 46,915 |
| English Inventions #1 | 0 | - | 3.15 | 23,586 |
| English Inventions #2 | 0 | - | 3.95 | 8,717 |
| British Geography Quiz #2 | 0 | - | 4.29 | 28,183 |
| Counties of the UK and Ireland | 0 | - | 4.98 | 131,906 |
| The Reign of Queen Elizabeth I | 0 | - | 4.53 | 31,905 |
| Houses of British Monarchs | 0 | - | 4.53 | 65,872 |
| British History Multiple Choice #1 | 0 | - | 4.46 | 55,270 |
| British History Multiple Choice #2 | 0 | - | 4.42 | 38,051 |
| Prime Ministers of the UK | 0 | - | 4.95 | 441,336 |
| World Capitals Closest to London | 0 | - | 4.88 | 110,952 |
| 50 Busiest Air Routes from London | 0 | - | 4.87 | 97,170 |
| Bridges of London | 0 | - | 4.17 | 10,135 |
| British Sport Trivia | 0 | - | 4.37 | 20,509 |
| 2025–2026 Football League Teams | 0 | - | 4.94 | 403,844 |
| Famous Welsh People | 0 | - | 4.34 | 11,643 |
| Liechtenstein Country Quiz | 0 | - | 4.64 | 27,186 |
| San Marino Country Quiz | 0 | - | 4.73 | 29,088 |
