| States of the German Confederation in 1848 | 0 | - | 4.89 | 31,493 |
| Regions of Italy | 0 | - | 4.92 | 74,619 |
| History of Italy | 0 | - | 4.55 | 31,802 |
| Counties of England | 0 | - | 4.97 | 788,560 |
| Ancient Roman Trivia #1 | 0 | - | 4.85 | 83,996 |
| Roman Emperors | 0 | - | 4.95 | 118,347 |
| Countries of Europe in 1815 With a Map | 0 | - | 4.99 | 148,823 |
| Countries of Europe in 1848 | 0 | - | 4.98 | 75,328 |
| Countries of Europe in 1870 with a Map | 0 | - | 4.95 | 63,280 |
| Every Country of Europe Since 1815 With a Map | 0 | - | 4.98 | 70,018 |
| Countries of Europe in 1360 with a Map | 0 | - | 4.99 | 55,941 |
| Regions of France Map Quiz | 0 | - | 4.97 | 143,028 |
| States of Germany Map Quiz | 0 | - | 4.91 | 131,594 |
| States of Germany | 0 | - | 4.96 | 149,866 |
| Germany Immigration by Country | 0 | - | 4.84 | 79,940 |
| Geography of the Dutch Empire | 0 | - | 4.62 | 34,469 |
| Netherlands Immigration by Country | 0 | - | 4.94 | 43,756 |
| Regions of Spain Quiz | 0 | - | 4.90 | 112,180 |
| Countries of the Spanish Empire | 0 | - | 4.52 | 76,965 |
| Cantons of Switzerland | 0 | - | 4.98 | 50,071 |
| Countries and Territories of the United Kingdom | 0 | - | 4.89 | 92,862 |
| Invasions of Great Britain | 0 | - | 4.51 | 59,362 |
| 10 Closest Megacities to London | 0 | - | 4.90 | 17,396 |
| Europe Map Quiz | 0 | - | 5.00 | 4,728,507 |
| Olympian Gods Quiz | 0 | - | 4.96 | 495,228 |
| Biggest Countries in Europe in 1700 | 0 | - | 4.73 | 58,107 |
| Italy Country Quiz | 0 | - | 4.82 | 122,110 |
| Regions of Italy Map Quiz | 0 | - | 4.96 | 148,276 |
| Countries Surrounding Rome | 0 | - | 4.97 | 49,348 |
| Europe by Borders in 30 Seconds | 0 | - | 4.98 | 424,940 |
| History of Austria | 0 | - | 4.70 | 17,741 |
| Geography of the French Empire | 0 | - | 4.48 | 26,917 |
| The French Revolution | 0 | - | 4.46 | 23,757 |
| History of France | 0 | - | 4.59 | 55,920 |
| Biggest Cities in Germany in 1910 | 0 | - | 4.41 | 23,374 |
| Roman Numeral Decoding Quiz | 0 | - | 4.94 | 433,228 |
| Two Letter Roman Numerals | 0 | - | 4.97 | 55,571 |
| The Vikings! | 0 | - | 4.45 | 28,236 |
| The Portuguese Empire | 0 | - | 4.54 | 11,984 |
| Name the English Monarchs | 0 | - | 4.92 | 497,541 |
| Wives of King Henry VIII | 0 | - | 4.55 | 53,157 |
| Countries the UK Declared War On | 0 | - | 4.61 | 121,719 |
| Geography of the British Empire | 0 | - | 4.48 | 39,464 |
| Letters of the Greek Alphabet | 0 | - | 4.97 | 641,392 |
| Name that Greek Letter | 0 | - | 4.94 | 321,480 |
| Countries Bordering Italy | 0 | - | 4.94 | 100,394 |
| Embarrassing Chapters in Italian History | 0 | - | 4.24 | 12,034 |
| Countries Closest to Italy | 0 | - | 4.97 | 196,199 |
| Malta Country Quiz | 0 | - | 4.81 | 30,797 |
| Countries That Use the Euro | 0 | - | 4.96 | 102,798 |
| Europe Cities Map Quiz | 0 | - | 4.99 | 362,135 |
| 10 Easternmost Countries in Europe | 0 | - | 4.89 | 113,395 |
| The Only European Country ... | 0 | - | 4.91 | 213,581 |
| European Countries NOT in NATO | 0 | - | 4.87 | 59,378 |
| The Trojan War | 0 | - | 4.83 | 39,400 |
| Greek Mythology General Knowledge #1 | 0 | - | 4.85 | 110,408 |
| Figures from Greek Mythology | 0 | - | 4.91 | 184,749 |
| Countries Italy Declared War On | 0 | - | 4.75 | 42,919 |
| Countries that Beat Italy | 0 | - | 4.85 | 53,822 |
| History of The Netherlands | 0 | - | 4.46 | 17,301 |
| History of Russia Quiz | 0 | - | 4.49 | 31,777 |
| 101 Figures from Greek Mythology | 0 | - | 4.99 | 124,133 |
| Ancient Roman Trivia #2 | 0 | - | 4.57 | 38,516 |
| Geography of the Roman Empire | 0 | - | 4.56 | 51,648 |
| Roman Names for Places | 0 | - | 4.62 | 57,835 |
| Byzantine History | 0 | - | 4.91 | 28,594 |
| Anglo-Saxon and Viking Kings of England | 0 | - | 4.74 | 12,081 |
| Flags of Europe Quiz | 0 | - | 4.99 | 1,224,826 |
| Countries of Europe - One Minute Sprint | 0 | - | 4.94 | 1,318,814 |
| 10 Biggest European Countries by Area | 0 | - | 4.99 | 191,621 |
| 10 Westernmost Countries in Europe | 0 | - | 4.96 | 150,220 |
| Top 10 Languages Spoken in Europe | 0 | - | 4.96 | 216,126 |
| European Landmarks Map Quiz | 0 | - | 4.97 | 86,421 |
| Countries of Europe with an Empty Map | 0 | - | 5.00 | 307,633 |
| All First-Level Subdivisions of Europe on a Map | 0 | - | 4.98 | 167,625 |
| Countries with Territory in the Balkans | 0 | - | 4.96 | 88,184 |
| Eastern Europe Map Quiz | 0 | - | 4.91 | 127,092 |
| Slavic Countries | 0 | - | 4.96 | 110,793 |
| Regions of France | 0 | - | 4.78 | 119,093 |
| France Immigration by Country | 0 | - | 4.72 | 75,928 |
| Germany Multiple Choice | 0 | - | 4.84 | 54,023 |
| History of Germany | 0 | - | 4.39 | 52,595 |
| Largest Islands of Greece | 0 | - | 4.59 | 47,422 |
| Ancient Greek Words | 0 | - | 4.92 | 110,596 |
| Provinces of the Netherlands | 0 | - | 4.80 | 40,741 |
| History of Spain | 0 | - | 4.29 | 20,992 |
| 100 Greatest Britons Quiz | 0 | - | 4.41 | 48,031 |
| Foods in a Full English Breakfast | 0 | - | 4.46 | 101,885 |
| The UK for Americans - True or False | 0 | - | 4.46 | 58,374 |
| Anglo-Saxon Kingdoms of England | 0 | - | 4.60 | 25,685 |
| Giant Great Britain Millennium Quiz | 0 | - | 4.78 | 20,068 |
| "Big Five" European Soccer Champions Since 2000 | 0 | - | 4.97 | 349,344 |
| European Geography By Letter - P #1 | 0 | - | 4.81 | 96,279 |
| European Diaspora - Top 11 Countries | 0 | - | 4.90 | 94,978 |
| 10 European Countries with the Most Tourists | 0 | - | 4.98 | 136,258 |
| Three Band Flags of Europe | 0 | - | 4.98 | 191,716 |
| Pixelated Europe Map | 0 | - | 4.88 | 121,712 |
| Monarchies of Europe | 0 | - | 4.90 | 97,239 |
| European Countries with One Border | 0 | - | 4.97 | 181,508 |
| European Countries with the Fewest Borders | 0 | - | 4.97 | 178,039 |
| European Geography By Letter - B #2 | 0 | - | 4.83 | 76,147 |
| Federal Subjects of Russia | 0 | - | 4.94 | 143,710 |
| Countries Formerly in Yugoslavia | 0 | - | 4.95 | 124,126 |
| French Inventions | 0 | - | 4.08 | 13,860 |
| History of Paris | 0 | - | 4.24 | 13,612 |
| Italian Inventions | 0 | - | 3.81 | 18,407 |
| Counties of England Map Quiz | 0 | - | 4.97 | 305,985 |
| Champions League Winners | 0 | - | 4.92 | 995,390 |
| Countries That Border Russia | 0 | - | 4.98 | 458,652 |
| Countries Bordering France | 0 | - | 4.85 | 397,628 |
| Countries Bordering Germany | 0 | - | 4.99 | 366,802 |
| Famous Ancient Romans | 0 | - | 4.69 | 84,994 |
| Seven Hills of Rome | 0 | - | 4.70 | 9,109 |
| American to British Word Translation | 0 | - | 4.06 | 117,021 |
| Languages of the United Kingdom | 0 | - | 4.13 | 40,690 |
| British Geography Multiple Choice | 0 | - | 4.49 | 43,158 |
| Countries of the Mongol Empire on a Map | 0 | - | 4.99 | 105,746 |
| Top 10 Coldest European Countries | 0 | - | 4.94 | 192,185 |
| Top 10 Hottest European Countries | 0 | - | 4.89 | 126,055 |
| Category Elimination - European Geography #1 | 0 | - | 4.98 | 230,297 |
| European Map without 10 Random Countries | 0 | - | 4.97 | 274,026 |
| Category Elimination - European Geography #2 | 0 | - | 4.99 | 164,978 |
| Name a Valid European Country #1 | 0 | - | 4.99 | 256,412 |
| Name a Valid European Country #2 | 0 | - | 4.94 | 113,084 |
| Russia Country Quiz | 0 | - | 4.85 | 113,584 |
| Croatia Country Quiz | 0 | - | 4.83 | 42,803 |
| Bosnia and Herzegovina Country Quiz | 0 | - | 4.86 | 35,004 |
| France Cities Map Quiz | 0 | - | 4.96 | 165,088 |
| Departments of France | 0 | - | 4.93 | 52,703 |
| Germany Country Quiz | 0 | - | 4.82 | 156,436 |
| Germany Cities Map Quiz | 0 | - | 4.87 | 125,074 |
| Ancient Greek Trivia | 0 | - | 4.62 | 66,744 |
| Geography of Ancient Greece | 0 | - | 4.69 | 31,757 |
| Italy Cities Map Quiz | 0 | - | 4.97 | 151,002 |
| Italian Foods | 0 | - | 4.30 | 72,133 |
| The Life of Julius Caesar | 0 | - | 4.39 | 38,939 |
| Spain Cities Map Quiz | 0 | - | 4.87 | 95,889 |
| Regions of Spain Map Quiz | 0 | - | 4.95 | 184,548 |
| Canary Islands | 0 | - | 4.61 | 17,390 |
| Switzerland Immigration by Country | 0 | - | 4.70 | 29,101 |
| British Spellings | 0 | - | 4.07 | 99,193 |
| British Groups of Things | 0 | - | 4.25 | 82,659 |
| British Acronyms | 0 | - | 4.39 | 45,605 |
| United Kingdom Decoder | 0 | - | 4.29 | 39,942 |
| Biggest Immigrant Groups by Decade in the UK | 0 | - | 4.62 | 24,392 |
| Modern-Day Countries of the British Empire in 1921 | 0 | - | 4.99 | 116,152 |
| Geography of Scotland | 0 | - | 4.63 | 21,468 |
| Former Dominions of the British Empire | 0 | - | 4.30 | 24,069 |
| Medieval English History | 0 | - | 4.53 | 43,295 |
| England or Wales? | 0 | - | 4.94 | 45,287 |
| All UEFA Champions League Teams Ever | 0 | - | 4.84 | 128,336 |
| U.S. Presidents Quiz | 0 | - | 5.00 | 3,650,174 |
| Deadliest U.S. Wars | 0 | - | 4.89 | 189,160 |
| European Countries by First 2 Letters | 0 | - | 4.95 | 526,116 |
| Countries That Touch the Adriatic Sea | 0 | - | 4.96 | 70,761 |
| European Countries with the Fewest Overnight Visitors | 0 | - | 4.78 | 41,596 |
| Top 10 European Countries by Coastline | 0 | - | 4.89 | 137,791 |
| Top 20 Football Clubs in Europe | 0 | - | 4.48 | 112,858 |
| 100 Longest Rivers in Europe - with a Map | 0 | - | 4.94 | 64,762 |
| Category Elimination - European Countries #1 | 0 | - | 4.89 | 88,895 |
| The Only Remaining European Country . . . | 0 | - | 4.41 | 63,736 |
| Countries that Border Poland | 0 | - | 4.99 | 171,254 |
| Non-Bordering Countries Closest to Russia | 0 | - | 4.91 | 82,344 |
| Countries With the Most Russian Speakers | 0 | - | 4.97 | 98,241 |
| Countries that Border Hungary | 0 | - | 4.98 | 103,634 |
| North Macedonia Country Quiz | 0 | - | 4.81 | 27,588 |
| Moldova Country Quiz | 0 | - | 4.81 | 30,521 |
| Countries Bordering Serbia | 0 | - | 4.96 | 91,671 |
| French Geography Quiz #1 | 0 | - | 4.89 | 34,495 |
| Andorra Country Quiz | 0 | - | 4.90 | 31,362 |
| Countries Bordering Austria | 0 | - | 4.97 | 117,694 |
| Countries that Visit France the Most | 0 | - | 4.85 | 45,488 |
| Countries Closest to Metropolitan France | 0 | - | 4.89 | 71,766 |
| Geography of Germany | 0 | - | 4.35 | 17,079 |
| Countries With the Most German Speakers | 0 | - | 4.89 | 94,101 |
| Greek Mythology General Knowledge #2 | 0 | - | 4.59 | 72,817 |
| Ancient Greece - Multiple Choice | 0 | - | 4.54 | 41,409 |
| Roman to Greek God | 0 | - | 4.52 | 122,144 |
| Counties of Ireland | 0 | - | 4.92 | 192,865 |
| Italian History A-Z | 0 | - | 4.21 | 17,362 |
| Roman History Vocabulary | 0 | - | 4.40 | 57,444 |
| Roman History by Picture | 0 | - | 4.46 | 26,332 |
| Geography of the Spanish Empire | 0 | - | 4.49 | 37,004 |
| Countries Closest to Spain | 0 | - | 4.96 | 225,171 |
| British to American Word Translation | 0 | - | 3.74 | 253,281 |
| British Foods by Description | 0 | - | 3.94 | 48,226 |
| British and American Word Differences | 0 | - | 2.67 | 45,907 |
| British Geography Quiz #2 | 0 | - | 4.29 | 27,495 |
| Counties of the UK and Ireland | 0 | - | 4.98 | 128,477 |
| Houses of British Monarchs | 0 | - | 4.53 | 65,262 |
| British History Multiple Choice #1 | 0 | - | 4.46 | 54,941 |
| British History Multiple Choice #2 | 0 | - | 4.42 | 37,817 |
| Prime Ministers of the UK | 0 | - | 4.96 | 434,247 |
| World Capitals Closest to London | 0 | - | 4.87 | 109,635 |
| 50 Busiest Air Routes from London | 0 | - | 4.86 | 95,718 |
| Bridges of London | 0 | - | 4.17 | 10,061 |
| British Sport Trivia | 0 | - | 4.37 | 20,351 |
| 2025–2026 Football League Teams | 0 | - | 4.93 | 396,810 |
| Famous Welsh People | 0 | - | 4.21 | 9,768 |
| Liechtenstein Country Quiz | 0 | - | 4.64 | 26,846 |
