| States of the German Confederation in 1848 | 0 | - | 4.89 | 31,517 |
| Regions of Spain Quiz | 0 | - | 4.90 | 112,310 |
| Countries of the Spanish Empire | 0 | - | 4.52 | 76,979 |
| Counties of England | 0 | - | 4.97 | 789,061 |
| History of Italy | 0 | - | 4.55 | 31,813 |
| Geography of the Dutch Empire | 0 | - | 4.62 | 34,478 |
| Invasions of Great Britain | 0 | - | 4.51 | 59,381 |
| Europe Map Quiz | 0 | - | 5.00 | 4,730,664 |
| Countries of Europe in 1815 With a Map | 0 | - | 4.99 | 148,921 |
| Countries of Europe in 1848 | 0 | - | 4.98 | 75,401 |
| Countries of Europe in 1870 with a Map | 0 | - | 4.95 | 63,380 |
| Every Country of Europe Since 1815 With a Map | 0 | - | 4.98 | 70,095 |
| Countries of Europe in 1360 with a Map | 0 | - | 4.99 | 56,003 |
| Regions of France Map Quiz | 0 | - | 4.97 | 143,102 |
| States of Germany Map Quiz | 0 | - | 4.91 | 131,671 |
| States of Germany | 0 | - | 4.96 | 150,011 |
| Germany Immigration by Country | 0 | - | 4.84 | 80,000 |
| Regions of Italy | 0 | - | 4.92 | 74,689 |
| Netherlands Immigration by Country | 0 | - | 4.94 | 43,795 |
| Cantons of Switzerland | 0 | - | 4.98 | 50,137 |
| Countries and Territories of the United Kingdom | 0 | - | 4.89 | 92,900 |
| 10 Closest Megacities to London | 0 | - | 4.90 | 17,403 |
| Biggest Countries in Europe in 1700 | 0 | - | 4.73 | 58,134 |
| Regions of Spain Map Quiz | 0 | - | 4.95 | 184,624 |
| History of Spain | 0 | - | 4.29 | 21,000 |
| Europe by Borders in 30 Seconds | 0 | - | 4.98 | 425,144 |
| History of Austria | 0 | - | 4.70 | 17,744 |
| Geography of the French Empire | 0 | - | 4.48 | 26,925 |
| The French Revolution | 0 | - | 4.46 | 23,780 |
| Biggest Cities in Germany in 1910 | 0 | - | 4.41 | 23,382 |
| The Vikings! | 0 | - | 4.45 | 28,244 |
| The Portuguese Empire | 0 | - | 4.54 | 11,989 |
| Name the English Monarchs | 0 | - | 4.92 | 497,806 |
| History of France | 0 | - | 4.59 | 56,015 |
| Countries Closest to Spain | 0 | - | 4.96 | 225,278 |
| Wives of King Henry VIII | 0 | - | 4.55 | 53,170 |
| Countries the UK Declared War On | 0 | - | 4.61 | 121,762 |
| Geography of the British Empire | 0 | - | 4.48 | 39,469 |
| Malta Country Quiz | 0 | - | 4.81 | 30,824 |
| Countries That Use the Euro | 0 | - | 4.96 | 102,942 |
| Europe Cities Map Quiz | 0 | - | 4.99 | 362,281 |
| 10 Easternmost Countries in Europe | 0 | - | 4.89 | 113,515 |
| The Only European Country ... | 0 | - | 4.91 | 213,776 |
| European Countries NOT in NATO | 0 | - | 4.87 | 59,501 |
| Letters of the Greek Alphabet | 0 | - | 4.97 | 641,788 |
| Name that Greek Letter | 0 | - | 4.94 | 321,631 |
| History of The Netherlands | 0 | - | 4.46 | 17,308 |
| Canary Islands | 0 | - | 4.61 | 17,401 |
| History of Russia Quiz | 0 | - | 4.49 | 31,788 |
| The Trojan War | 0 | - | 4.83 | 39,424 |
| Greek Mythology General Knowledge #1 | 0 | - | 4.85 | 110,515 |
| Ancient Roman Trivia #1 | 0 | - | 4.85 | 84,038 |
| Roman Emperors | 0 | - | 4.95 | 118,446 |
| Countries that Beat Spain | 0 | - | 4.94 | 62,453 |
| Anglo-Saxon and Viking Kings of England | 0 | - | 4.74 | 12,090 |
| Flags of Europe Quiz | 0 | - | 4.99 | 1,226,291 |
| Countries of Europe - One Minute Sprint | 0 | - | 4.94 | 1,319,621 |
| 10 Biggest European Countries by Area | 0 | - | 4.99 | 191,701 |
| 10 Westernmost Countries in Europe | 0 | - | 4.96 | 150,268 |
| Top 10 Languages Spoken in Europe | 0 | - | 4.96 | 216,277 |
| European Landmarks Map Quiz | 0 | - | 4.97 | 86,455 |
| Countries of Europe with an Empty Map | 0 | - | 5.00 | 307,793 |
| All First-Level Subdivisions of Europe on a Map | 0 | - | 4.98 | 167,839 |
| Countries with Territory in the Balkans | 0 | - | 4.96 | 88,236 |
| Eastern Europe Map Quiz | 0 | - | 4.91 | 127,178 |
| Slavic Countries | 0 | - | 4.96 | 110,840 |
| French History Multiple Choice | 0 | - | 4.55 | 32,874 |
| Germany Multiple Choice | 0 | - | 4.84 | 54,045 |
| History of Germany | 0 | - | 4.39 | 52,613 |
| 101 Figures from Greek Mythology | 0 | - | 5.00 | 124,259 |
| Geography of the Spanish Empire | 0 | - | 4.49 | 37,019 |
| Anglo-Saxon Kingdoms of England | 0 | - | 4.60 | 25,686 |
| Giant Great Britain Millennium Quiz | 0 | - | 4.78 | 20,073 |
| "Big Five" European Soccer Champions Since 2000 | 0 | - | 4.97 | 349,812 |
| Regions of France | 0 | - | 4.78 | 119,206 |
| France Immigration by Country | 0 | - | 4.72 | 75,957 |
| Largest Islands of Greece | 0 | - | 4.59 | 47,460 |
| Olympian Gods Quiz | 0 | - | 4.96 | 495,977 |
| Ancient Greek Words | 0 | - | 4.92 | 110,681 |
| Provinces of the Netherlands | 0 | - | 4.80 | 40,771 |
| Countries Closest to Spain A-Z | 0 | - | 4.99 | 107,663 |
| 100 Greatest Britons Quiz | 0 | - | 4.41 | 48,043 |
| Foods in a Full English Breakfast | 0 | - | 4.46 | 101,938 |
| The UK for Americans - True or False | 0 | - | 4.46 | 58,386 |
| European Geography By Letter - P #1 | 0 | - | 4.81 | 96,319 |
| European Diaspora - Top 11 Countries | 0 | - | 4.90 | 95,030 |
| 10 European Countries with the Most Tourists | 0 | - | 4.98 | 136,358 |
| Three Band Flags of Europe | 0 | - | 4.98 | 191,831 |
| Pixelated Europe Map | 0 | - | 4.88 | 121,784 |
| Monarchies of Europe | 0 | - | 4.90 | 97,299 |
| European Countries with One Border | 0 | - | 4.97 | 181,597 |
| European Countries with the Fewest Borders | 0 | - | 4.97 | 178,509 |
| European Geography By Letter - B #2 | 0 | - | 4.83 | 76,226 |
| Federal Subjects of Russia | 0 | - | 4.94 | 143,940 |
| Countries Formerly in Yugoslavia | 0 | - | 4.95 | 124,179 |
| French Inventions | 0 | - | 4.08 | 13,864 |
| History of Paris | 0 | - | 4.24 | 13,613 |
| Embarrassing Chapters in Italian History | 0 | - | 4.24 | 12,039 |
| Two Letter Roman Numerals | 0 | - | 4.97 | 55,614 |
| Spain Country Quiz | 0 | - | 4.45 | 127,584 |
| American to British Word Translation | 0 | - | 4.06 | 117,050 |
| Languages of the United Kingdom | 0 | - | 4.13 | 40,701 |
| Counties of England Map Quiz | 0 | - | 4.97 | 306,069 |
| British Geography Multiple Choice | 0 | - | 4.49 | 43,169 |
| Champions League Winners | 0 | - | 4.92 | 996,170 |
| Countries of the Mongol Empire on a Map | 0 | - | 4.99 | 105,865 |
| Top 10 Coldest European Countries | 0 | - | 4.94 | 192,227 |
| Top 10 Hottest European Countries | 0 | - | 4.89 | 126,107 |
| Category Elimination - European Geography #1 | 0 | - | 4.98 | 230,482 |
| European Map without 10 Random Countries | 0 | - | 4.97 | 274,171 |
| Category Elimination - European Geography #2 | 0 | - | 4.99 | 165,134 |
| Name a Valid European Country #1 | 0 | - | 4.99 | 256,707 |
| Name a Valid European Country #2 | 0 | - | 4.94 | 113,224 |
| Russia Country Quiz | 0 | - | 4.85 | 113,619 |
| Countries That Border Russia | 0 | - | 4.98 | 458,862 |
| Croatia Country Quiz | 0 | - | 4.83 | 42,844 |
| Bosnia and Herzegovina Country Quiz | 0 | - | 4.86 | 35,031 |
| France Cities Map Quiz | 0 | - | 4.96 | 165,172 |
| Departments of France | 0 | - | 4.93 | 52,793 |
| Countries Bordering France | 0 | - | 4.83 | 398,842 |
| Germany Country Quiz | 0 | - | 4.82 | 156,515 |
| Germany Cities Map Quiz | 0 | - | 4.86 | 125,131 |
| Countries Bordering Germany | 0 | - | 4.99 | 366,999 |
| Italy Country Quiz | 0 | - | 4.82 | 122,174 |
| Regions of Italy Map Quiz | 0 | - | 4.96 | 148,339 |
| Italy Cities Map Quiz | 0 | - | 4.97 | 151,063 |
| Countries Surrounding Rome | 0 | - | 4.97 | 49,360 |
| Roman Numeral Decoding Quiz | 0 | - | 4.94 | 433,468 |
| Spain Cities Map Quiz | 0 | - | 4.87 | 95,946 |
| Modern-Day Countries of the British Empire in 1921 | 0 | - | 4.99 | 116,244 |
| Former Dominions of the British Empire | 0 | - | 4.30 | 24,082 |
| England or Wales? | 0 | - | 4.94 | 45,306 |
| All UEFA Champions League Teams Ever | 0 | - | 4.84 | 128,466 |
| European Countries by First 2 Letters | 0 | - | 4.95 | 526,282 |
| European Countries with the Fewest Overnight Visitors | 0 | - | 4.78 | 41,598 |
| Top 20 Football Clubs in Europe | 0 | - | 4.48 | 113,013 |
| The Only Remaining European Country . . . | 0 | - | 4.41 | 63,776 |
| Ancient Greek Trivia | 0 | - | 4.62 | 66,766 |
| Geography of Ancient Greece | 0 | - | 4.69 | 31,766 |
| Figures from Greek Mythology | 0 | - | 4.91 | 184,912 |
| Countries Italy Declared War On | 0 | - | 4.75 | 42,941 |
| Countries Bordering Spain | 0 | - | 4.51 | 69,071 |
| Switzerland Immigration by Country | 0 | - | 4.70 | 29,142 |
| British Spellings | 0 | - | 4.07 | 99,201 |
| British Groups of Things | 0 | - | 4.25 | 82,668 |
| British Acronyms | 0 | - | 4.39 | 45,617 |
| United Kingdom Decoder | 0 | - | 4.29 | 39,944 |
| Biggest Immigrant Groups by Decade in the UK | 0 | - | 4.62 | 24,447 |
| Geography of Scotland | 0 | - | 4.63 | 21,476 |
| Medieval English History | 0 | - | 4.53 | 43,314 |
| U.S. Presidents Quiz | 0 | - | 5.00 | 3,653,340 |
| Deadliest U.S. Wars | 0 | - | 4.89 | 189,225 |
| Countries That Touch the Adriatic Sea | 0 | - | 4.96 | 70,783 |
| Top 10 European Countries by Coastline | 0 | - | 4.89 | 137,835 |
| 100 Longest Rivers in Europe - with a Map | 0 | - | 4.94 | 64,783 |
| Category Elimination - European Countries #1 | 0 | - | 4.89 | 88,954 |
| Countries that Border Poland | 0 | - | 4.99 | 171,330 |
| Non-Bordering Countries Closest to Russia | 0 | - | 4.91 | 82,369 |
| Countries With the Most Russian Speakers | 0 | - | 4.97 | 98,410 |
| Countries that Border Hungary | 0 | - | 4.98 | 103,687 |
| North Macedonia Country Quiz | 0 | - | 4.81 | 27,612 |
| Moldova Country Quiz | 0 | - | 4.81 | 30,538 |
| Countries Bordering Serbia | 0 | - | 4.96 | 91,731 |
| French Geography Quiz #1 | 0 | - | 4.89 | 34,509 |
| Andorra Country Quiz | 0 | - | 4.90 | 31,384 |
| Countries Bordering Austria | 0 | - | 4.97 | 117,767 |
| Countries that Visit France the Most | 0 | - | 4.85 | 45,521 |
| Countries Closest to Metropolitan France | 0 | - | 4.89 | 71,792 |
| Geography of Germany | 0 | - | 4.35 | 17,083 |
| Countries With the Most German Speakers | 0 | - | 4.89 | 94,274 |
| Greek Mythology General Knowledge #2 | 0 | - | 4.59 | 72,885 |
| Ancient Greece - Multiple Choice | 0 | - | 4.54 | 41,427 |
| Counties of Ireland | 0 | - | 4.92 | 193,033 |
| Italian Inventions | 0 | - | 3.81 | 18,410 |
| Countries Bordering Italy | 0 | - | 4.94 | 100,439 |
| Countries Closest to Italy | 0 | - | 4.97 | 196,291 |
| Ancient Roman Trivia #2 | 0 | - | 4.57 | 38,529 |
| Geography of the Roman Empire | 0 | - | 4.56 | 51,660 |
| Roman Names for Places | 0 | - | 4.62 | 57,865 |
| Byzantine History | 0 | - | 4.91 | 28,613 |
| Spanish History A-Z | 0 | - | 4.36 | 19,029 |
| Real Madrid 2010s Starting XI | 0 | - | 4.89 | 66,135 |
| British to American Word Translation | 0 | - | 3.74 | 253,295 |
| British Foods by Description | 0 | - | 3.94 | 48,229 |
| British and American Word Differences | 0 | - | 2.67 | 45,910 |
| English Inventions #1 | 0 | - | 3.15 | 23,512 |
| English Inventions #2 | 0 | - | 3.98 | 8,658 |
| British Geography Quiz #2 | 0 | - | 4.29 | 27,505 |
| Counties of the UK and Ireland | 0 | - | 4.98 | 128,578 |
| Houses of British Monarchs | 0 | - | 4.53 | 65,289 |
| British History Multiple Choice #1 | 0 | - | 4.46 | 54,951 |
| British History Multiple Choice #2 | 0 | - | 4.42 | 37,830 |
| Prime Ministers of the UK | 0 | - | 4.96 | 434,561 |
| World Capitals Closest to London | 0 | - | 4.87 | 109,710 |
| 50 Busiest Air Routes from London | 0 | - | 4.86 | 95,753 |
| Bridges of London | 0 | - | 4.17 | 10,062 |
| British Sport Trivia | 0 | - | 4.37 | 20,363 |
| 2025–2026 Football League Teams | 0 | - | 4.93 | 397,120 |
| Famous Welsh People | 0 | - | 4.21 | 9,770 |
| Liechtenstein Country Quiz | 0 | - | 4.64 | 26,869 |
