| States of the German Confederation in 1848 | 0 | - | 4.89 | 31,630 |
| Counties of England | 0 | - | 4.97 | 790,567 |
| History of Austria | 0 | - | 4.70 | 17,775 |
| History of France | 0 | - | 4.59 | 56,333 |
| Wives of King Henry VIII | 0 | - | 4.55 | 53,227 |
| Countries the UK Declared War On | 0 | - | 4.61 | 121,957 |
| Geography of the British Empire | 0 | - | 4.48 | 39,529 |
| Countries of Europe in 1815 With a Map | 0 | - | 4.99 | 149,187 |
| Countries of Europe in 1848 | 0 | - | 4.98 | 75,630 |
| Countries of Europe in 1870 with a Map | 0 | - | 4.95 | 63,650 |
| Every Country of Europe Since 1815 With a Map | 0 | - | 4.98 | 70,303 |
| Countries of Europe in 1360 with a Map | 0 | - | 4.99 | 56,188 |
| Regions of France Map Quiz | 0 | - | 4.97 | 143,449 |
| States of Germany Map Quiz | 0 | - | 4.91 | 131,947 |
| States of Germany | 0 | - | 4.96 | 150,532 |
| Germany Immigration by Country | 0 | - | 4.85 | 80,169 |
| Regions of Italy | 0 | - | 4.92 | 74,935 |
| History of Italy | 0 | - | 4.55 | 31,858 |
| Geography of the Dutch Empire | 0 | - | 4.62 | 34,516 |
| Netherlands Immigration by Country | 0 | - | 4.94 | 43,961 |
| Regions of Spain Quiz | 0 | - | 4.90 | 112,620 |
| Countries of the Spanish Empire | 0 | - | 4.52 | 77,020 |
| Cantons of Switzerland | 0 | - | 4.98 | 50,492 |
| Countries and Territories of the United Kingdom | 0 | - | 4.89 | 93,165 |
| Invasions of Great Britain | 0 | - | 4.51 | 59,629 |
| 10 Closest Megacities to London | 0 | - | 4.90 | 17,578 |
| Europe Map Quiz | 0 | - | 5.00 | 4,737,560 |
| Anglo-Saxon and Viking Kings of England | 0 | - | 4.74 | 12,117 |
| Biggest Countries in Europe in 1700 | 0 | - | 4.73 | 58,218 |
| History of Germany | 0 | - | 4.39 | 52,667 |
| Anglo-Saxon Kingdoms of England | 0 | - | 4.60 | 25,702 |
| Giant Great Britain Millennium Quiz | 0 | - | 4.78 | 20,089 |
| Europe by Borders in 30 Seconds | 0 | - | 4.98 | 425,779 |
| Geography of the French Empire | 0 | - | 4.45 | 26,963 |
| The French Revolution | 0 | - | 4.46 | 23,821 |
| Biggest Cities in Germany in 1910 | 0 | - | 4.41 | 23,403 |
| The Vikings! | 0 | - | 4.46 | 28,263 |
| The Portuguese Empire | 0 | - | 4.54 | 12,005 |
| Name the English Monarchs | 0 | - | 4.92 | 498,907 |
| Letters of the Greek Alphabet | 0 | - | 4.97 | 643,109 |
| Name that Greek Letter | 0 | - | 4.94 | 322,021 |
| Modern Day Countries of the Dutch Empire on a Map | 0 | - | 4.87 | 60,494 |
| Modern Day Countries of the Spanish Empire on a Map | 0 | - | 4.95 | 85,647 |
| Malta Country Quiz | 0 | - | 4.81 | 30,877 |
| Countries That Use the Euro | 0 | - | 4.95 | 103,419 |
| Europe Cities Map Quiz | 0 | - | 4.99 | 362,711 |
| 10 Easternmost Countries in Europe | 0 | - | 4.89 | 113,898 |
| The Only European Country ... | 0 | - | 4.91 | 214,409 |
| European Countries NOT in NATO | 0 | - | 4.87 | 59,906 |
| The Trojan War | 0 | - | 4.83 | 39,485 |
| Greek Mythology General Knowledge #1 | 0 | - | 4.85 | 110,821 |
| Ancient Roman Trivia #1 | 0 | - | 4.85 | 84,150 |
| Roman Emperors | 0 | - | 4.95 | 118,756 |
| History of The Netherlands | 0 | - | 4.46 | 17,339 |
| History of Russia Quiz | 0 | - | 4.49 | 31,811 |
| French History Multiple Choice | 0 | - | 4.55 | 32,905 |
| 101 Figures from Greek Mythology | 0 | - | 4.99 | 124,649 |
| Former Dominions of the British Empire | 0 | - | 4.27 | 24,112 |
| Flags of Europe Quiz | 0 | - | 4.99 | 1,230,087 |
| Countries of Europe - One Minute Sprint | 0 | - | 4.94 | 1,321,444 |
| 10 Biggest European Countries by Area | 0 | - | 4.99 | 191,892 |
| 10 Westernmost Countries in Europe | 0 | - | 4.96 | 150,476 |
| Top 10 Languages Spoken in Europe | 0 | - | 4.96 | 216,804 |
| European Landmarks Map Quiz | 0 | - | 4.97 | 86,617 |
| Countries of Europe with an Empty Map | 0 | - | 5.00 | 308,299 |
| All First-Level Subdivisions of Europe on a Map | 0 | - | 4.98 | 168,677 |
| Countries with Territory in the Balkans | 0 | - | 4.96 | 88,453 |
| Eastern Europe Map Quiz | 0 | - | 4.91 | 127,351 |
| Slavic Countries | 0 | - | 4.96 | 111,019 |
| Regions of France | 0 | - | 4.78 | 119,563 |
| France Immigration by Country | 0 | - | 4.72 | 76,053 |
| Germany Multiple Choice | 0 | - | 4.84 | 54,109 |
| Largest Islands of Greece | 0 | - | 4.59 | 47,591 |
| Olympian Gods Quiz | 0 | - | 4.96 | 497,266 |
| Ancient Greek Words | 0 | - | 4.92 | 110,880 |
| Provinces of the Netherlands | 0 | - | 4.80 | 40,927 |
| History of Spain | 0 | - | 4.29 | 21,021 |
| 100 Greatest Britons Quiz | 0 | - | 4.41 | 48,099 |
| Foods in a Full English Breakfast | 0 | - | 4.46 | 102,117 |
| The UK for Americans - True or False | 0 | - | 4.44 | 58,446 |
| "Big Five" European Soccer Champions Since 2000 | 0 | - | 4.97 | 351,049 |
| European Geography By Letter - P #1 | 0 | - | 4.81 | 96,496 |
| European Diaspora - Top 11 Countries | 0 | - | 4.90 | 95,170 |
| 10 European Countries with the Most Tourists | 0 | - | 4.98 | 136,606 |
| Three Band Flags of Europe | 0 | - | 4.98 | 192,137 |
| Pixelated Europe Map | 0 | - | 4.88 | 121,977 |
| Monarchies of Europe | 0 | - | 4.90 | 97,487 |
| European Countries with One Border | 0 | - | 4.97 | 181,833 |
| European Countries with the Fewest Borders | 0 | - | 4.97 | 178,730 |
| European Geography By Letter - B #2 | 0 | - | 4.83 | 76,481 |
| Federal Subjects of Russia | 0 | - | 4.94 | 144,569 |
| Countries Formerly in Yugoslavia | 0 | - | 4.95 | 124,328 |
| French Inventions | 0 | - | 4.08 | 13,868 |
| History of Paris | 0 | - | 4.24 | 13,623 |
| States of the Holy Roman Empire in 1356 | 0 | - | 4.97 | 72,817 |
| Embarrassing Chapters in Italian History | 0 | - | 4.24 | 12,054 |
| Roman Numeral Decoding Quiz | 0 | - | 4.94 | 434,301 |
| Two Letter Roman Numerals | 0 | - | 4.97 | 55,704 |
| Counties of England Map Quiz | 0 | - | 4.97 | 306,342 |
| Champions League Winners | 0 | - | 4.92 | 998,178 |
| Modern-Day Countries of the Holy Roman Empire on a Map | 0 | - | 4.93 | 45,339 |
| Countries That Border Russia | 0 | - | 4.98 | 459,654 |
| Countries Bordering France | 0 | - | 4.83 | 400,386 |
| Countries Bordering Germany | 0 | - | 4.99 | 367,479 |
| American to British Word Translation | 0 | - | 4.12 | 136,976 |
| Languages of the United Kingdom | 0 | - | 4.13 | 40,760 |
| British Geography Multiple Choice | 0 | - | 4.49 | 43,230 |
| Countries of the Mongol Empire on a Map | 0 | - | 4.99 | 106,087 |
| Top 10 Coldest European Countries | 0 | - | 4.94 | 192,394 |
| Top 10 Hottest European Countries | 0 | - | 4.89 | 126,269 |
| Category Elimination - European Geography #1 | 0 | - | 4.98 | 230,992 |
| European Map without 10 Random Countries | 0 | - | 4.97 | 274,609 |
| Category Elimination - European Geography #2 | 0 | - | 4.99 | 165,520 |
| Name a Valid European Country #1 | 0 | - | 4.99 | 257,557 |
| Name a Valid European Country #2 | 0 | - | 4.94 | 113,496 |
| Russia Country Quiz | 0 | - | 4.85 | 113,806 |
| Croatia Country Quiz | 0 | - | 4.83 | 42,963 |
| Bosnia and Herzegovina Country Quiz | 0 | - | 4.86 | 35,108 |
| France Cities Map Quiz | 0 | - | 4.96 | 165,418 |
| Departments of France | 0 | - | 4.93 | 53,028 |
| Germany Country Quiz | 0 | - | 4.82 | 156,824 |
| Germany Cities Map Quiz | 0 | - | 4.86 | 125,354 |
| Ancient Greek Trivia | 0 | - | 4.62 | 66,821 |
| Geography of Ancient Greece | 0 | - | 4.69 | 31,802 |
| Figures from Greek Mythology | 0 | - | 4.91 | 185,360 |
| Italy Country Quiz | 0 | - | 4.82 | 122,427 |
| Regions of Italy Map Quiz | 0 | - | 4.96 | 148,591 |
| Italy Cities Map Quiz | 0 | - | 4.97 | 151,276 |
| Countries Italy Declared War On | 0 | - | 4.75 | 43,050 |
| Countries Surrounding Rome | 0 | - | 4.97 | 49,402 |
| Spain Cities Map Quiz | 0 | - | 4.87 | 96,221 |
| Regions of Spain Map Quiz | 0 | - | 4.95 | 184,825 |
| Canary Islands | 0 | - | 4.61 | 17,420 |
| Switzerland Immigration by Country | 0 | - | 4.70 | 29,254 |
| British Spellings | 0 | - | 4.07 | 99,298 |
| British Groups of Things | 0 | - | 4.25 | 82,726 |
| British Acronyms | 0 | - | 4.39 | 45,662 |
| United Kingdom Decoder | 0 | - | 4.29 | 39,974 |
| Biggest Immigrant Groups by Decade in the UK | 0 | - | 4.63 | 24,631 |
| Modern-Day Countries of the British Empire in 1921 | 0 | - | 4.99 | 116,556 |
| Geography of Scotland | 0 | - | 4.63 | 21,509 |
| Medieval English History | 0 | - | 4.53 | 43,350 |
| England or Wales? | 0 | - | 4.94 | 45,403 |
| All UEFA Champions League Teams Ever | 0 | - | 4.85 | 128,794 |
| U.S. Presidents Quiz | 0 | - | 5.00 | 3,663,203 |
| Deadliest U.S. Wars | 0 | - | 4.89 | 189,480 |
| European Countries by First 2 Letters | 0 | - | 4.95 | 526,846 |
| Countries That Touch the Adriatic Sea | 0 | - | 4.96 | 70,844 |
| European Countries with the Fewest Overnight Visitors | 0 | - | 4.78 | 41,613 |
| Top 10 European Countries by Coastline | 0 | - | 4.87 | 137,950 |
| Top 20 Football Clubs in Europe | 0 | - | 4.48 | 113,401 |
| 100 Longest Rivers in Europe - with a Map | 0 | - | 4.94 | 64,960 |
| Category Elimination - European Countries #1 | 0 | - | 4.89 | 89,164 |
| The Only Remaining European Country . . . | 0 | - | 4.41 | 63,860 |
| Countries that Border Poland | 0 | - | 4.99 | 171,552 |
| Non-Bordering Countries Closest to Russia | 0 | - | 4.91 | 82,462 |
| Countries With the Most Russian Speakers | 0 | - | 4.97 | 98,955 |
| Countries that Border Hungary | 0 | - | 4.98 | 103,805 |
| North Macedonia Country Quiz | 0 | - | 4.81 | 27,673 |
| Moldova Country Quiz | 0 | - | 4.81 | 30,598 |
| Countries Bordering Serbia | 0 | - | 4.96 | 91,887 |
| French Geography Quiz #1 | 0 | - | 4.89 | 34,565 |
| Andorra Country Quiz | 0 | - | 4.90 | 31,461 |
| Countries Bordering Austria | 0 | - | 4.97 | 117,898 |
| Countries that Visit France the Most | 0 | - | 4.85 | 45,605 |
| Countries Closest to Metropolitan France | 0 | - | 4.89 | 71,884 |
| Embarrassing Chapters in French History | 0 | - | 3.65 | 20,054 |
| Geography of Germany | 0 | - | 4.35 | 17,111 |
| Countries With the Most German Speakers | 0 | - | 4.89 | 94,800 |
| Greek Mythology General Knowledge #2 | 0 | - | 4.59 | 73,046 |
| Ancient Greece - Multiple Choice | 0 | - | 4.54 | 41,486 |
| Counties of Ireland | 0 | - | 4.92 | 193,477 |
| Countries Bordering Italy | 0 | - | 4.94 | 100,545 |
| Countries Closest to Italy | 0 | - | 4.97 | 196,591 |
| Ancient Roman Trivia #2 | 0 | - | 4.57 | 38,579 |
| Geography of the Roman Empire | 0 | - | 4.56 | 51,734 |
| Roman Names for Places | 0 | - | 4.62 | 57,948 |
| Byzantine History | 0 | - | 4.91 | 28,660 |
| Geography of the Spanish Empire | 0 | - | 4.49 | 37,057 |
| Countries Closest to Spain | 0 | - | 4.96 | 225,893 |
| British to American Word Translation | 0 | - | 3.75 | 254,774 |
| British Foods by Description | 0 | - | 3.94 | 48,274 |
| British and American Word Differences | 0 | - | 2.64 | 46,787 |
| British Geography Quiz #2 | 0 | - | 4.29 | 27,530 |
| Counties of the UK and Ireland | 0 | - | 4.98 | 129,031 |
| The Reign of Queen Elizabeth I | 0 | - | 4.53 | 31,644 |
| Houses of British Monarchs | 0 | - | 4.53 | 65,374 |
| British History Multiple Choice #1 | 0 | - | 4.46 | 54,992 |
| British History Multiple Choice #2 | 0 | - | 4.42 | 37,862 |
| Prime Ministers of the UK | 0 | - | 4.96 | 435,464 |
| World Capitals Closest to London | 0 | - | 4.87 | 109,895 |
| 50 Busiest Air Routes from London | 0 | - | 4.87 | 95,879 |
| Bridges of London | 0 | - | 4.17 | 10,066 |
| British Sport Trivia | 0 | - | 4.37 | 20,384 |
| 2025–2026 Football League Teams | 0 | - | 4.93 | 398,000 |
| Famous Welsh People | 0 | - | 4.21 | 9,782 |
| Liechtenstein Country Quiz | 0 | - | 4.64 | 26,917 |
| San Marino Country Quiz | 0 | - | 4.70 | 28,803 |
| African Countries by First 2 Letters | 0 | - | 4.96 | 266,789 |
| Colonies of Africa with a Map | 0 | - | 4.77 | 54,052 |
