| States of the German Confederation in 1848 | 0 | - | 4.90 | 32,346 |
| Counties of England | 0 | - | 4.97 | 801,426 |
| History of France | 0 | - | 4.61 | 57,483 |
| The Portuguese Empire | 0 | - | 4.58 | 12,095 |
| Wives of King Henry VIII | 0 | - | 4.55 | 53,439 |
| Countries the UK Declared War On | 0 | - | 4.55 | 123,127 |
| Geography of the British Empire | 0 | - | 4.48 | 39,818 |
| Countries of Europe in 1815 With a Map | 0 | - | 4.99 | 151,106 |
| Countries of Europe in 1848 | 0 | - | 4.98 | 84,756 |
| Countries of Europe in 1870 with a Map | 0 | - | 4.95 | 65,519 |
| Every Country of Europe Since 1815 With a Map | 0 | - | 4.98 | 71,649 |
| Countries of Europe in 1360 with a Map | 0 | - | 4.99 | 57,406 |
| Regions of France Map Quiz | 0 | - | 4.97 | 145,385 |
| States of Germany Map Quiz | 0 | - | 4.92 | 133,571 |
| States of Germany | 0 | - | 4.95 | 154,057 |
| Germany Immigration by Country | 0 | - | 4.86 | 81,554 |
| Regions of Italy | 0 | - | 4.92 | 76,743 |
| History of Italy | 0 | - | 4.55 | 32,113 |
| Geography of the Dutch Empire | 0 | - | 4.62 | 34,785 |
| Netherlands Immigration by Country | 0 | - | 4.93 | 52,665 |
| Regions of Spain Quiz | 0 | - | 4.90 | 115,054 |
| Countries of the Spanish Empire | 0 | - | 4.52 | 77,387 |
| Cantons of Switzerland | 0 | - | 4.98 | 51,624 |
| Countries and Territories of the United Kingdom | 0 | - | 4.90 | 94,393 |
| Invasions of Great Britain | 0 | - | 4.51 | 60,049 |
| 10 Closest Megacities to London | 0 | - | 4.90 | 17,811 |
| Europe Map Quiz | 0 | - | 5.00 | 4,781,290 |
| Anglo-Saxon and Viking Kings of England | 0 | - | 4.74 | 12,310 |
| Biggest Countries in Europe in 1700 | 0 | - | 4.73 | 58,698 |
| History of Germany | 0 | - | 4.39 | 52,945 |
| Anglo-Saxon Kingdoms of England | 0 | - | 4.60 | 25,810 |
| Giant Great Britain Millennium Quiz | 0 | - | 4.78 | 20,222 |
| Europe by Borders in 30 Seconds | 0 | - | 4.98 | 430,274 |
| History of Austria | 0 | - | 4.70 | 17,955 |
| Geography of the French Empire | 0 | - | 4.45 | 27,198 |
| The French Revolution | 0 | - | 4.47 | 24,117 |
| Biggest Cities in Germany in 1910 | 0 | - | 4.41 | 23,545 |
| The Vikings! | 0 | - | 4.46 | 28,394 |
| Name the English Monarchs | 0 | - | 4.91 | 505,517 |
| Letters of the Greek Alphabet | 0 | - | 4.97 | 650,814 |
| Name that Greek Letter | 0 | - | 4.93 | 324,710 |
| Modern Day Countries of the Dutch Empire on a Map | 0 | - | 4.86 | 61,523 |
| Modern Day Countries of the Spanish Empire on a Map | 0 | - | 4.95 | 86,731 |
| Malta Country Quiz | 0 | - | 4.81 | 31,205 |
| Countries That Use the Euro | 0 | - | 4.95 | 106,328 |
| Europe Cities Map Quiz | 0 | - | 4.99 | 365,775 |
| 10 Easternmost Countries in Europe | 0 | - | 4.87 | 116,775 |
| The Only European Country ... | 0 | - | 4.91 | 218,429 |
| European Countries NOT in NATO | 0 | - | 4.91 | 62,192 |
| The Trojan War | 0 | - | 4.83 | 39,937 |
| Greek Mythology General Knowledge #1 | 0 | - | 4.85 | 112,699 |
| Ancient Roman Trivia #1 | 0 | - | 4.85 | 85,498 |
| Roman Emperors | 0 | - | 4.95 | 120,926 |
| History of The Netherlands | 0 | - | 4.46 | 17,530 |
| History of Russia Quiz | 0 | - | 4.47 | 31,987 |
| French History Multiple Choice | 0 | - | 4.55 | 33,182 |
| 101 Figures from Greek Mythology | 0 | - | 4.99 | 127,173 |
| Former Dominions of the British Empire | 0 | - | 4.27 | 24,249 |
| Flags of Europe Quiz | 0 | - | 4.99 | 1,254,167 |
| Countries of Europe - One Minute Sprint | 0 | - | 4.94 | 1,333,910 |
| 10 Biggest European Countries by Area | 0 | - | 4.99 | 193,309 |
| 10 Westernmost Countries in Europe | 0 | - | 4.96 | 151,857 |
| Top 10 Languages Spoken in Europe | 0 | - | 4.96 | 220,285 |
| European Landmarks Map Quiz | 0 | - | 4.97 | 87,624 |
| Countries of Europe with an Empty Map | 0 | - | 5.00 | 312,234 |
| All First-Level Subdivisions of Europe on a Map | 0 | - | 4.99 | 175,060 |
| Countries with Territory in the Balkans | 0 | - | 4.96 | 89,962 |
| Eastern Europe Map Quiz | 0 | - | 4.91 | 128,651 |
| Slavic Countries | 0 | - | 4.96 | 112,198 |
| Regions of France | 0 | - | 4.70 | 121,783 |
| France Immigration by Country | 0 | - | 4.70 | 76,839 |
| Germany Multiple Choice | 0 | - | 4.84 | 54,629 |
| Largest Islands of Greece | 0 | - | 4.59 | 48,353 |
| Olympian Gods Quiz | 0 | - | 4.96 | 503,068 |
| Ancient Greek Words | 0 | - | 4.93 | 112,271 |
| Provinces of the Netherlands | 0 | - | 4.80 | 41,645 |
| History of Spain | 0 | - | 4.23 | 21,147 |
| 100 Greatest Britons Quiz | 0 | - | 4.41 | 48,383 |
| Foods in a Full English Breakfast | 0 | - | 4.46 | 103,663 |
| The UK for Americans - True or False | 0 | - | 4.43 | 58,765 |
| "Big Five" European Soccer Champions Since 2000 | 0 | - | 4.97 | 360,239 |
| European Geography By Letter - P #1 | 0 | - | 4.81 | 98,578 |
| European Diaspora - Top 11 Countries | 0 | - | 4.90 | 96,345 |
| 10 European Countries with the Most Tourists | 0 | - | 4.98 | 138,256 |
| Three Band Flags of Europe | 0 | - | 4.98 | 194,242 |
| Pixelated Europe Map | 0 | - | 4.88 | 123,297 |
| Monarchies of Europe | 0 | - | 4.90 | 98,676 |
| European Countries with One Border | 0 | - | 4.97 | 183,532 |
| European Countries with the Fewest Borders | 0 | - | 4.97 | 180,280 |
| European Geography By Letter - B #2 | 0 | - | 4.87 | 88,307 |
| Federal Subjects of Russia | 0 | - | 4.95 | 148,979 |
| Countries Formerly in Yugoslavia | 0 | - | 4.95 | 125,340 |
| French Inventions | 0 | - | 4.10 | 13,918 |
| History of Paris | 0 | - | 4.24 | 13,669 |
| States of the Holy Roman Empire in 1356 | 0 | - | 4.98 | 75,003 |
| Embarrassing Chapters in Italian History | 0 | - | 4.24 | 12,150 |
| Roman Numeral Decoding Quiz | 0 | - | 4.94 | 439,134 |
| Two Letter Roman Numerals | 0 | - | 4.97 | 56,417 |
| Counties of England Map Quiz | 0 | - | 4.97 | 308,697 |
| Champions League Winners | 0 | - | 4.92 | 1,013,551 |
| Modern-Day Countries of the Holy Roman Empire on a Map | 0 | - | 4.93 | 45,862 |
| Countries That Border Russia | 0 | - | 4.98 | 463,984 |
| Countries Bordering France | 0 | - | 4.83 | 404,419 |
| Countries Bordering Germany | 0 | - | 4.99 | 371,388 |
| American to British Word Translation | 0 | - | 4.14 | 139,552 |
| Languages of the United Kingdom | 0 | - | 4.14 | 41,026 |
| British Geography Multiple Choice | 0 | - | 4.49 | 43,420 |
| Top 10 Coldest European Countries | 0 | - | 4.94 | 193,664 |
| Top 10 Hottest European Countries | 0 | - | 4.88 | 127,596 |
| Category Elimination - European Geography #1 | 0 | - | 4.98 | 235,193 |
| European Map without 10 Random Countries | 0 | - | 4.97 | 278,497 |
| Category Elimination - European Geography #2 | 0 | - | 4.99 | 168,477 |
| Name a Valid European Country #1 | 0 | - | 4.99 | 263,816 |
| Name a Valid European Country #2 | 0 | - | 4.94 | 115,637 |
| Russia Country Quiz | 0 | - | 4.83 | 115,157 |
| Croatia Country Quiz | 0 | - | 4.83 | 43,636 |
| Bosnia and Herzegovina Country Quiz | 0 | - | 4.86 | 35,511 |
| Andorra Country Quiz | 0 | - | 4.91 | 31,879 |
| France Cities Map Quiz | 0 | - | 4.96 | 167,536 |
| Departments of France | 0 | - | 4.93 | 54,885 |
| Germany Country Quiz | 0 | - | 4.83 | 158,596 |
| Germany Cities Map Quiz | 0 | - | 4.87 | 126,920 |
| Ancient Greek Trivia | 0 | - | 4.62 | 67,177 |
| Geography of Ancient Greece | 0 | - | 4.69 | 32,008 |
| Most-Mentioned Characters in the Iliad | 0 | - | 4.81 | 20,925 |
| Figures from Greek Mythology | 0 | - | 4.91 | 188,414 |
| Regions of Italy Map Quiz | 0 | - | 4.96 | 150,035 |
| Italy Cities Map Quiz | 0 | - | 4.97 | 152,886 |
| Countries Italy Declared War On | 0 | - | 4.75 | 43,566 |
| Countries Surrounding Rome | 0 | - | 4.97 | 49,707 |
| Spain Cities Map Quiz | 0 | - | 4.87 | 97,338 |
| Regions of Spain Map Quiz | 0 | - | 4.95 | 186,631 |
| Canary Islands | 0 | - | 4.62 | 17,514 |
| Switzerland Immigration by Country | 0 | - | 4.69 | 29,972 |
| British Spellings | 0 | - | 4.06 | 99,566 |
| British Groups of Things | 0 | - | 4.25 | 82,976 |
| British Acronyms | 0 | - | 4.40 | 45,904 |
| United Kingdom Decoder | 0 | - | 4.29 | 40,087 |
| Biggest Immigrant Groups by Decade in the UK | 0 | - | 4.63 | 25,606 |
| Modern-Day Countries of the British Empire in 1921 | 0 | - | 4.99 | 118,484 |
| English Monarchs in Order by First Letter | 0 | - | 4.38 | 32,058 |
| Geography of Scotland | 0 | - | 4.63 | 21,705 |
| Medieval English History | 0 | - | 4.53 | 43,620 |
| England or Wales? | 0 | - | 4.94 | 45,901 |
| All UEFA Champions League Teams Ever | 0 | - | 4.85 | 131,690 |
| Countries of the Mongol Empire on a Map | 0 | - | 4.99 | 107,350 |
| U.S. Presidents Quiz | 0 | - | 5.00 | 3,719,401 |
| Deadliest U.S. Wars | 0 | - | 4.89 | 191,585 |
| European Countries by First 2 Letters | 0 | - | 4.95 | 531,801 |
| Countries That Touch the Adriatic Sea | 0 | - | 4.96 | 71,294 |
| European Countries with the Fewest Overnight Visitors | 0 | - | 4.80 | 41,700 |
| Top 10 European Countries by Coastline | 0 | - | 4.88 | 138,638 |
| Top 20 Football Clubs in Europe | 0 | - | 4.48 | 116,303 |
| 100 Longest Rivers in Europe - with a Map | 0 | - | 4.94 | 65,802 |
| Category Elimination - European Countries #1 | 0 | - | 4.90 | 90,826 |
| The Only Remaining European Country . . . | 0 | - | 4.41 | 64,570 |
| Countries that Border Poland | 0 | - | 4.99 | 172,976 |
| Non-Bordering Countries Closest to Russia | 0 | - | 4.91 | 83,147 |
| Countries With the Most Russian Speakers | 0 | - | 4.97 | 102,341 |
| Countries that Border Hungary | 0 | - | 4.98 | 104,904 |
| North Macedonia Country Quiz | 0 | - | 4.81 | 27,996 |
| Moldova Country Quiz | 0 | - | 4.82 | 30,977 |
| Countries Bordering Serbia | 0 | - | 4.96 | 92,929 |
| French Geography Quiz #1 | 0 | - | 4.89 | 35,015 |
| Countries Bordering Austria | 0 | - | 4.97 | 118,850 |
| Countries that Visit France the Most | 0 | - | 4.85 | 46,080 |
| Countries Closest to Metropolitan France | 0 | - | 4.89 | 72,400 |
| Embarrassing Chapters in French History | 0 | - | 3.65 | 20,161 |
| Geography of Germany | 0 | - | 4.35 | 17,249 |
| Countries With the Most German Speakers | 0 | - | 4.89 | 98,152 |
| Greek Mythology General Knowledge #2 | 0 | - | 4.59 | 74,164 |
| Ancient Greece - Multiple Choice | 0 | - | 4.54 | 41,795 |
| Counties of Ireland | 0 | - | 4.92 | 196,879 |
| Countries Bordering Italy | 0 | - | 4.94 | 101,175 |
| Countries Closest to Italy | 0 | - | 4.97 | 199,107 |
| Ancient Roman Trivia #2 | 0 | - | 4.60 | 44,109 |
| Geography of the Roman Empire | 0 | - | 4.55 | 52,162 |
| Roman Names for Places | 0 | - | 4.62 | 58,618 |
| Byzantine History | 0 | - | 4.91 | 28,994 |
| Byzantine Emperors | 0 | - | 4.92 | 14,517 |
| Geography of the Spanish Empire | 0 | - | 4.49 | 37,288 |
| Countries Closest to Spain | 0 | - | 4.96 | 227,832 |
| British to American Word Translation | 0 | - | 3.74 | 255,279 |
| British Foods by Description | 0 | - | 3.94 | 48,367 |
| British and American Word Differences | 0 | - | 2.63 | 46,917 |
| British Geography Quiz #2 | 0 | - | 4.29 | 28,192 |
| Counties of the UK and Ireland | 0 | - | 4.98 | 132,020 |
| The Reign of Queen Elizabeth I | 0 | - | 4.53 | 31,911 |
| Houses of British Monarchs | 0 | - | 4.53 | 65,883 |
| British History Multiple Choice #1 | 0 | - | 4.46 | 55,278 |
| British History Multiple Choice #2 | 0 | - | 4.42 | 38,056 |
| Prime Ministers of the UK | 0 | - | 4.95 | 441,485 |
| World Capitals Closest to London | 0 | - | 4.88 | 110,967 |
| 50 Busiest Air Routes from London | 0 | - | 4.87 | 97,190 |
| Bridges of London | 0 | - | 4.17 | 10,135 |
| British Sport Trivia | 0 | - | 4.37 | 20,512 |
| 2025–2026 Football League Teams | 0 | - | 4.94 | 403,958 |
| Famous Welsh People | 0 | - | 4.34 | 11,654 |
| Liechtenstein Country Quiz | 0 | - | 4.64 | 27,191 |
| San Marino Country Quiz | 0 | - | 4.73 | 29,091 |
