| States of the German Confederation in 1848 | 0 | - | 4.89 | 31,539 |
| Regions of Italy | 0 | - | 4.92 | 74,756 |
| Counties of England | 0 | - | 4.97 | 789,423 |
| Ancient Roman Trivia #1 | 0 | - | 4.85 | 84,063 |
| Roman Emperors | 0 | - | 4.95 | 118,516 |
| Geography of the Dutch Empire | 0 | - | 4.62 | 34,489 |
| Countries of the Spanish Empire | 0 | - | 4.52 | 76,984 |
| Invasions of Great Britain | 0 | - | 4.51 | 59,454 |
| Europe Map Quiz | 0 | - | 5.00 | 4,732,213 |
| Countries of Europe in 1815 With a Map | 0 | - | 4.99 | 148,983 |
| Countries of Europe in 1848 | 0 | - | 4.98 | 75,451 |
| Countries of Europe in 1870 with a Map | 0 | - | 4.95 | 63,447 |
| Every Country of Europe Since 1815 With a Map | 0 | - | 4.98 | 70,141 |
| Countries of Europe in 1360 with a Map | 0 | - | 4.99 | 56,037 |
| Regions of France Map Quiz | 0 | - | 4.97 | 143,195 |
| States of Germany Map Quiz | 0 | - | 4.91 | 131,744 |
| States of Germany | 0 | - | 4.96 | 150,135 |
| Germany Immigration by Country | 0 | - | 4.84 | 80,051 |
| Netherlands Immigration by Country | 0 | - | 4.94 | 43,838 |
| Regions of Spain Quiz | 0 | - | 4.90 | 112,393 |
| Cantons of Switzerland | 0 | - | 4.98 | 50,219 |
| Countries and Territories of the United Kingdom | 0 | - | 4.89 | 92,986 |
| 10 Closest Megacities to London | 0 | - | 4.90 | 17,473 |
| Biggest Countries in Europe in 1700 | 0 | - | 4.73 | 58,157 |
| Olympian Gods Quiz | 0 | - | 4.96 | 496,377 |
| Italy Country Quiz | 0 | - | 4.82 | 122,247 |
| Regions of Italy Map Quiz | 0 | - | 4.96 | 148,430 |
| Countries Surrounding Rome | 0 | - | 4.97 | 49,377 |
| Europe by Borders in 30 Seconds | 0 | - | 4.98 | 425,283 |
| History of Austria | 0 | - | 4.70 | 17,756 |
| Geography of the French Empire | 0 | - | 4.48 | 26,941 |
| The French Revolution | 0 | - | 4.46 | 23,788 |
| Biggest Cities in Germany in 1910 | 0 | - | 4.41 | 23,388 |
| Two Letter Roman Numerals | 0 | - | 4.97 | 55,634 |
| The Vikings! | 0 | - | 4.46 | 28,248 |
| The Portuguese Empire | 0 | - | 4.54 | 11,995 |
| Name the English Monarchs | 0 | - | 4.92 | 498,064 |
| History of France | 0 | - | 4.59 | 56,092 |
| Countries Bordering Italy | 0 | - | 4.94 | 100,468 |
| Embarrassing Chapters in Italian History | 0 | - | 4.24 | 12,044 |
| Countries Closest to Italy | 0 | - | 4.97 | 196,360 |
| Roman Numeral Decoding Quiz | 0 | - | 4.94 | 433,635 |
| Wives of King Henry VIII | 0 | - | 4.55 | 53,189 |
| Countries the UK Declared War On | 0 | - | 4.61 | 121,812 |
| Geography of the British Empire | 0 | - | 4.48 | 39,482 |
| Malta Country Quiz | 0 | - | 4.81 | 30,833 |
| Countries That Use the Euro | 0 | - | 4.96 | 103,059 |
| Europe Cities Map Quiz | 0 | - | 4.99 | 362,376 |
| 10 Easternmost Countries in Europe | 0 | - | 4.89 | 113,618 |
| The Only European Country ... | 0 | - | 4.91 | 213,924 |
| European Countries NOT in NATO | 0 | - | 4.87 | 59,596 |
| Letters of the Greek Alphabet | 0 | - | 4.97 | 642,053 |
| Name that Greek Letter | 0 | - | 4.94 | 321,722 |
| Countries Italy Declared War On | 0 | - | 4.75 | 42,967 |
| History of The Netherlands | 0 | - | 4.46 | 17,316 |
| History of Russia Quiz | 0 | - | 4.49 | 31,795 |
| The Trojan War | 0 | - | 4.83 | 39,443 |
| Greek Mythology General Knowledge #1 | 0 | - | 4.85 | 110,580 |
| Figures from Greek Mythology | 0 | - | 4.91 | 185,010 |
| Countries that Beat Italy | 0 | - | 4.85 | 53,892 |
| Anglo-Saxon and Viking Kings of England | 0 | - | 4.74 | 12,096 |
| Flags of Europe Quiz | 0 | - | 4.99 | 1,227,196 |
| Countries of Europe - One Minute Sprint | 0 | - | 4.94 | 1,320,035 |
| 10 Biggest European Countries by Area | 0 | - | 4.99 | 191,730 |
| 10 Westernmost Countries in Europe | 0 | - | 4.96 | 150,312 |
| Top 10 Languages Spoken in Europe | 0 | - | 4.96 | 216,404 |
| European Landmarks Map Quiz | 0 | - | 4.97 | 86,491 |
| Countries of Europe with an Empty Map | 0 | - | 5.00 | 307,893 |
| All First-Level Subdivisions of Europe on a Map | 0 | - | 4.98 | 167,997 |
| Countries with Territory in the Balkans | 0 | - | 4.96 | 88,288 |
| Eastern Europe Map Quiz | 0 | - | 4.91 | 127,218 |
| Slavic Countries | 0 | - | 4.96 | 110,881 |
| Germany Multiple Choice | 0 | - | 4.84 | 54,056 |
| History of Germany | 0 | - | 4.39 | 52,619 |
| 101 Figures from Greek Mythology | 0 | - | 5.00 | 124,335 |
| Ancient Roman Trivia #2 | 0 | - | 4.57 | 38,542 |
| Geography of the Roman Empire | 0 | - | 4.56 | 51,680 |
| Roman Names for Places | 0 | - | 4.62 | 57,886 |
| Byzantine History | 0 | - | 4.91 | 28,627 |
| History of Spain | 0 | - | 4.29 | 21,004 |
| Anglo-Saxon Kingdoms of England | 0 | - | 4.60 | 25,692 |
| Giant Great Britain Millennium Quiz | 0 | - | 4.78 | 20,075 |
| "Big Five" European Soccer Champions Since 2000 | 0 | - | 4.97 | 350,086 |
| Regions of France | 0 | - | 4.78 | 119,297 |
| France Immigration by Country | 0 | - | 4.72 | 75,981 |
| Largest Islands of Greece | 0 | - | 4.59 | 47,476 |
| Ancient Greek Words | 0 | - | 4.92 | 110,723 |
| Provinces of the Netherlands | 0 | - | 4.80 | 40,842 |
| 100 Greatest Britons Quiz | 0 | - | 4.41 | 48,057 |
| Foods in a Full English Breakfast | 0 | - | 4.46 | 101,989 |
| The UK for Americans - True or False | 0 | - | 4.46 | 58,399 |
| European Geography By Letter - P #1 | 0 | - | 4.81 | 96,348 |
| European Diaspora - Top 11 Countries | 0 | - | 4.90 | 95,060 |
| 10 European Countries with the Most Tourists | 0 | - | 4.98 | 136,426 |
| Three Band Flags of Europe | 0 | - | 4.98 | 191,906 |
| Pixelated Europe Map | 0 | - | 4.88 | 121,846 |
| Monarchies of Europe | 0 | - | 4.90 | 97,342 |
| European Countries with One Border | 0 | - | 4.97 | 181,662 |
| European Countries with the Fewest Borders | 0 | - | 4.97 | 178,559 |
| European Geography By Letter - B #2 | 0 | - | 4.83 | 76,291 |
| Federal Subjects of Russia | 0 | - | 4.94 | 144,049 |
| Countries Formerly in Yugoslavia | 0 | - | 4.95 | 124,226 |
| French Inventions | 0 | - | 4.08 | 13,866 |
| History of Paris | 0 | - | 4.24 | 13,616 |
| Famous Ancient Romans | 0 | - | 4.69 | 85,032 |
| Italian Inventions | 0 | - | 3.81 | 18,411 |
| American to British Word Translation | 0 | - | 4.06 | 126,069 |
| Languages of the United Kingdom | 0 | - | 4.13 | 40,715 |
| Counties of England Map Quiz | 0 | - | 4.97 | 306,139 |
| British Geography Multiple Choice | 0 | - | 4.49 | 43,183 |
| Champions League Winners | 0 | - | 4.92 | 996,663 |
| Countries of the Mongol Empire on a Map | 0 | - | 4.99 | 105,927 |
| Top 10 Coldest European Countries | 0 | - | 4.94 | 192,270 |
| Top 10 Hottest European Countries | 0 | - | 4.89 | 126,139 |
| Category Elimination - European Geography #1 | 0 | - | 4.98 | 230,611 |
| European Map without 10 Random Countries | 0 | - | 4.97 | 274,293 |
| Category Elimination - European Geography #2 | 0 | - | 4.99 | 165,219 |
| Name a Valid European Country #1 | 0 | - | 4.99 | 256,906 |
| Name a Valid European Country #2 | 0 | - | 4.94 | 113,290 |
| Russia Country Quiz | 0 | - | 4.85 | 113,662 |
| Countries That Border Russia | 0 | - | 4.98 | 458,984 |
| Croatia Country Quiz | 0 | - | 4.83 | 42,865 |
| Bosnia and Herzegovina Country Quiz | 0 | - | 4.86 | 35,044 |
| France Cities Map Quiz | 0 | - | 4.96 | 165,240 |
| Departments of France | 0 | - | 4.93 | 52,858 |
| Countries Bordering France | 0 | - | 4.83 | 399,382 |
| Germany Country Quiz | 0 | - | 4.82 | 156,601 |
| Germany Cities Map Quiz | 0 | - | 4.86 | 125,173 |
| Countries Bordering Germany | 0 | - | 4.99 | 367,120 |
| Italy Cities Map Quiz | 0 | - | 4.97 | 151,108 |
| Seven Hills of Rome | 0 | - | 4.70 | 9,117 |
| Spain Cities Map Quiz | 0 | - | 4.87 | 95,976 |
| Regions of Spain Map Quiz | 0 | - | 4.95 | 184,677 |
| Modern-Day Countries of the British Empire in 1921 | 0 | - | 4.99 | 116,328 |
| Former Dominions of the British Empire | 0 | - | 4.30 | 24,087 |
| England or Wales? | 0 | - | 4.94 | 45,330 |
| All UEFA Champions League Teams Ever | 0 | - | 4.85 | 128,540 |
| European Countries by First 2 Letters | 0 | - | 4.95 | 526,439 |
| European Countries with the Fewest Overnight Visitors | 0 | - | 4.78 | 41,602 |
| Top 20 Football Clubs in Europe | 0 | - | 4.48 | 113,095 |
| The Only Remaining European Country . . . | 0 | - | 4.41 | 63,795 |
| Ancient Greek Trivia | 0 | - | 4.62 | 66,781 |
| Geography of Ancient Greece | 0 | - | 4.69 | 31,774 |
| Italian Foods | 0 | - | 4.31 | 72,212 |
| The Life of Julius Caesar | 0 | - | 4.39 | 38,959 |
| Canary Islands | 0 | - | 4.61 | 17,406 |
| Switzerland Immigration by Country | 0 | - | 4.70 | 29,168 |
| British Spellings | 0 | - | 4.07 | 99,231 |
| British Groups of Things | 0 | - | 4.25 | 82,683 |
| British Acronyms | 0 | - | 4.39 | 45,622 |
| United Kingdom Decoder | 0 | - | 4.29 | 39,951 |
| Biggest Immigrant Groups by Decade in the UK | 0 | - | 4.62 | 24,488 |
| Geography of Scotland | 0 | - | 4.63 | 21,486 |
| Medieval English History | 0 | - | 4.53 | 43,326 |
| U.S. Presidents Quiz | 0 | - | 5.00 | 3,655,723 |
| Deadliest U.S. Wars | 0 | - | 4.89 | 189,296 |
| Countries That Touch the Adriatic Sea | 0 | - | 4.96 | 70,799 |
| Top 10 European Countries by Coastline | 0 | - | 4.89 | 137,869 |
| 100 Longest Rivers in Europe - with a Map | 0 | - | 4.94 | 64,852 |
| Category Elimination - European Countries #1 | 0 | - | 4.89 | 88,995 |
| Countries that Border Poland | 0 | - | 4.99 | 171,383 |
| Non-Bordering Countries Closest to Russia | 0 | - | 4.91 | 82,391 |
| Countries With the Most Russian Speakers | 0 | - | 4.97 | 98,555 |
| Countries that Border Hungary | 0 | - | 4.98 | 103,716 |
| North Macedonia Country Quiz | 0 | - | 4.81 | 27,626 |
| Moldova Country Quiz | 0 | - | 4.81 | 30,547 |
| Countries Bordering Serbia | 0 | - | 4.96 | 91,775 |
| French Geography Quiz #1 | 0 | - | 4.89 | 34,522 |
| Andorra Country Quiz | 0 | - | 4.90 | 31,406 |
| Countries Bordering Austria | 0 | - | 4.97 | 117,797 |
| Countries that Visit France the Most | 0 | - | 4.85 | 45,543 |
| Countries Closest to Metropolitan France | 0 | - | 4.89 | 71,816 |
| Geography of Germany | 0 | - | 4.35 | 17,089 |
| Countries With the Most German Speakers | 0 | - | 4.89 | 94,390 |
| Greek Mythology General Knowledge #2 | 0 | - | 4.59 | 72,925 |
| Ancient Greece - Multiple Choice | 0 | - | 4.54 | 41,444 |
| Roman to Greek God | 0 | - | 4.52 | 122,234 |
| Counties of Ireland | 0 | - | 4.92 | 193,139 |
| Italian History A-Z | 0 | - | 4.21 | 17,426 |
| Roman History Vocabulary | 0 | - | 4.40 | 57,465 |
| Roman History by Picture | 0 | - | 4.46 | 26,346 |
| Geography of the Spanish Empire | 0 | - | 4.49 | 37,032 |
| Countries Closest to Spain | 0 | - | 4.96 | 225,347 |
| British to American Word Translation | 0 | - | 3.74 | 253,842 |
| British Foods by Description | 0 | - | 3.94 | 48,245 |
| British and American Word Differences | 0 | - | 2.67 | 46,264 |
| English Inventions #1 | 0 | - | 3.15 | 23,515 |
| English Inventions #2 | 0 | - | 4.00 | 8,660 |
| British Geography Quiz #2 | 0 | - | 4.29 | 27,511 |
| Counties of the UK and Ireland | 0 | - | 4.98 | 128,681 |
| Houses of British Monarchs | 0 | - | 4.53 | 65,305 |
| British History Multiple Choice #1 | 0 | - | 4.46 | 54,965 |
| British History Multiple Choice #2 | 0 | - | 4.42 | 37,840 |
| Prime Ministers of the UK | 0 | - | 4.96 | 434,772 |
| World Capitals Closest to London | 0 | - | 4.87 | 109,765 |
| 50 Busiest Air Routes from London | 0 | - | 4.86 | 95,784 |
| Bridges of London | 0 | - | 4.17 | 10,063 |
| British Sport Trivia | 0 | - | 4.37 | 20,367 |
| 2025–2026 Football League Teams | 0 | - | 4.93 | 397,338 |
| Famous Welsh People | 0 | - | 4.21 | 9,773 |
