| States of the German Confederation in 1848 | 0 | - | 4.89 | 31,517 |
| Regions of Spain Quiz | 0 | - | 4.90 | 112,318 |
| Countries of the Spanish Empire | 0 | - | 4.52 | 76,979 |
| Counties of England | 0 | - | 4.97 | 789,088 |
| History of Italy | 0 | - | 4.55 | 31,813 |
| Geography of the Dutch Empire | 0 | - | 4.62 | 34,479 |
| Invasions of Great Britain | 0 | - | 4.51 | 59,383 |
| Europe Map Quiz | 0 | - | 5.00 | 4,730,858 |
| Countries of Europe in 1815 With a Map | 0 | - | 4.99 | 148,930 |
| Countries of Europe in 1848 | 0 | - | 4.98 | 75,406 |
| Countries of Europe in 1870 with a Map | 0 | - | 4.95 | 63,392 |
| Every Country of Europe Since 1815 With a Map | 0 | - | 4.98 | 70,101 |
| Countries of Europe in 1360 with a Map | 0 | - | 4.99 | 56,009 |
| Regions of France Map Quiz | 0 | - | 4.97 | 143,109 |
| States of Germany Map Quiz | 0 | - | 4.91 | 131,675 |
| States of Germany | 0 | - | 4.96 | 150,017 |
| Germany Immigration by Country | 0 | - | 4.84 | 80,001 |
| Regions of Italy | 0 | - | 4.92 | 74,696 |
| Netherlands Immigration by Country | 0 | - | 4.94 | 43,801 |
| Cantons of Switzerland | 0 | - | 4.98 | 50,139 |
| Countries and Territories of the United Kingdom | 0 | - | 4.89 | 92,903 |
| 10 Closest Megacities to London | 0 | - | 4.90 | 17,403 |
| Biggest Countries in Europe in 1700 | 0 | - | 4.73 | 58,139 |
| Regions of Spain Map Quiz | 0 | - | 4.95 | 184,626 |
| History of Spain | 0 | - | 4.29 | 21,000 |
| Europe by Borders in 30 Seconds | 0 | - | 4.98 | 425,170 |
| History of Austria | 0 | - | 4.70 | 17,746 |
| Geography of the French Empire | 0 | - | 4.48 | 26,927 |
| The French Revolution | 0 | - | 4.46 | 23,782 |
| Biggest Cities in Germany in 1910 | 0 | - | 4.41 | 23,383 |
| The Vikings! | 0 | - | 4.45 | 28,244 |
| The Portuguese Empire | 0 | - | 4.54 | 11,990 |
| Name the English Monarchs | 0 | - | 4.92 | 497,834 |
| History of France | 0 | - | 4.59 | 56,025 |
| Countries Closest to Spain | 0 | - | 4.96 | 225,291 |
| Wives of King Henry VIII | 0 | - | 4.55 | 53,173 |
| Countries the UK Declared War On | 0 | - | 4.61 | 121,765 |
| 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 | 102,956 |
| Europe Cities Map Quiz | 0 | - | 4.99 | 362,288 |
| 10 Easternmost Countries in Europe | 0 | - | 4.89 | 113,525 |
| The Only European Country ... | 0 | - | 4.91 | 213,791 |
| European Countries NOT in NATO | 0 | - | 4.87 | 59,512 |
| Letters of the Greek Alphabet | 0 | - | 4.97 | 641,809 |
| Name that Greek Letter | 0 | - | 4.94 | 321,633 |
| History of The Netherlands | 0 | - | 4.46 | 17,310 |
| Canary Islands | 0 | - | 4.61 | 17,401 |
| History of Russia Quiz | 0 | - | 4.49 | 31,789 |
| The Trojan War | 0 | - | 4.83 | 39,425 |
| Greek Mythology General Knowledge #1 | 0 | - | 4.85 | 110,520 |
| Ancient Roman Trivia #1 | 0 | - | 4.85 | 84,040 |
| Roman Emperors | 0 | - | 4.95 | 118,461 |
| Countries that Beat Spain | 0 | - | 4.94 | 62,457 |
| Anglo-Saxon and Viking Kings of England | 0 | - | 4.74 | 12,090 |
| Flags of Europe Quiz | 0 | - | 4.99 | 1,226,398 |
| Countries of Europe - One Minute Sprint | 0 | - | 4.94 | 1,319,653 |
| 10 Biggest European Countries by Area | 0 | - | 4.99 | 191,703 |
| 10 Westernmost Countries in Europe | 0 | - | 4.96 | 150,274 |
| Top 10 Languages Spoken in Europe | 0 | - | 4.96 | 216,290 |
| European Landmarks Map Quiz | 0 | - | 4.97 | 86,458 |
| Countries of Europe with an Empty Map | 0 | - | 5.00 | 307,801 |
| All First-Level Subdivisions of Europe on a Map | 0 | - | 4.98 | 167,851 |
| Countries with Territory in the Balkans | 0 | - | 4.96 | 88,244 |
| Eastern Europe Map Quiz | 0 | - | 4.91 | 127,182 |
| Slavic Countries | 0 | - | 4.96 | 110,846 |
| French History Multiple Choice | 0 | - | 4.55 | 32,875 |
| Germany Multiple Choice | 0 | - | 4.84 | 54,046 |
| History of Germany | 0 | - | 4.39 | 52,613 |
| 101 Figures from Greek Mythology | 0 | - | 5.00 | 124,276 |
| Geography of the Spanish Empire | 0 | - | 4.49 | 37,021 |
| 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 | 349,844 |
| Regions of France | 0 | - | 4.78 | 119,220 |
| France Immigration by Country | 0 | - | 4.72 | 75,958 |
| Largest Islands of Greece | 0 | - | 4.59 | 47,464 |
| Olympian Gods Quiz | 0 | - | 4.96 | 496,031 |
| Ancient Greek Words | 0 | - | 4.92 | 110,685 |
| Provinces of the Netherlands | 0 | - | 4.80 | 40,771 |
| Countries Closest to Spain A-Z | 0 | - | 4.99 | 107,665 |
| 100 Greatest Britons Quiz | 0 | - | 4.41 | 48,044 |
| Foods in a Full English Breakfast | 0 | - | 4.46 | 101,942 |
| The UK for Americans - True or False | 0 | - | 4.46 | 58,386 |
| European Geography By Letter - P #1 | 0 | - | 4.81 | 96,322 |
| European Diaspora - Top 11 Countries | 0 | - | 4.90 | 95,033 |
| 10 European Countries with the Most Tourists | 0 | - | 4.98 | 136,367 |
| Three Band Flags of Europe | 0 | - | 4.98 | 191,836 |
| Pixelated Europe Map | 0 | - | 4.88 | 121,791 |
| Monarchies of Europe | 0 | - | 4.90 | 97,301 |
| European Countries with One Border | 0 | - | 4.97 | 181,603 |
| European Countries with the Fewest Borders | 0 | - | 4.97 | 178,512 |
| European Geography By Letter - B #2 | 0 | - | 4.83 | 76,229 |
| Federal Subjects of Russia | 0 | - | 4.94 | 143,950 |
| Countries Formerly in Yugoslavia | 0 | - | 4.95 | 124,183 |
| French Inventions | 0 | - | 4.08 | 13,865 |
| History of Paris | 0 | - | 4.24 | 13,614 |
| Embarrassing Chapters in Italian History | 0 | - | 4.24 | 12,041 |
| Two Letter Roman Numerals | 0 | - | 4.97 | 55,614 |
| Spain Country Quiz | 0 | - | 4.45 | 127,594 |
| American to British Word Translation | 0 | - | 4.06 | 117,053 |
| Languages of the United Kingdom | 0 | - | 4.13 | 40,701 |
| Counties of England Map Quiz | 0 | - | 4.97 | 306,071 |
| British Geography Multiple Choice | 0 | - | 4.49 | 43,170 |
| Champions League Winners | 0 | - | 4.92 | 996,206 |
| Countries of the Mongol Empire on a Map | 0 | - | 4.99 | 105,874 |
| Top 10 Coldest European Countries | 0 | - | 4.94 | 192,230 |
| Top 10 Hottest European Countries | 0 | - | 4.89 | 126,113 |
| Category Elimination - European Geography #1 | 0 | - | 4.98 | 230,500 |
| European Map without 10 Random Countries | 0 | - | 4.97 | 274,184 |
| Category Elimination - European Geography #2 | 0 | - | 4.99 | 165,146 |
| Name a Valid European Country #1 | 0 | - | 4.99 | 256,734 |
| Name a Valid European Country #2 | 0 | - | 4.94 | 113,232 |
| Russia Country Quiz | 0 | - | 4.85 | 113,620 |
| Countries That Border Russia | 0 | - | 4.98 | 458,883 |
| Croatia Country Quiz | 0 | - | 4.83 | 42,845 |
| Bosnia and Herzegovina Country Quiz | 0 | - | 4.86 | 35,032 |
| France Cities Map Quiz | 0 | - | 4.96 | 165,179 |
| Departments of France | 0 | - | 4.93 | 52,796 |
| Countries Bordering France | 0 | - | 4.83 | 398,919 |
| Germany Country Quiz | 0 | - | 4.82 | 156,525 |
| Germany Cities Map Quiz | 0 | - | 4.86 | 125,135 |
| Countries Bordering Germany | 0 | - | 4.99 | 367,013 |
| Italy Country Quiz | 0 | - | 4.82 | 122,184 |
| Regions of Italy Map Quiz | 0 | - | 4.96 | 148,344 |
| Italy Cities Map Quiz | 0 | - | 4.97 | 151,067 |
| Countries Surrounding Rome | 0 | - | 4.97 | 49,362 |
| Roman Numeral Decoding Quiz | 0 | - | 4.94 | 433,489 |
| Spain Cities Map Quiz | 0 | - | 4.87 | 95,947 |
| Modern-Day Countries of the British Empire in 1921 | 0 | - | 4.99 | 116,254 |
| Former Dominions of the British Empire | 0 | - | 4.30 | 24,082 |
| England or Wales? | 0 | - | 4.94 | 45,309 |
| All UEFA Champions League Teams Ever | 0 | - | 4.84 | 128,477 |
| European Countries by First 2 Letters | 0 | - | 4.95 | 526,307 |
| European Countries with the Fewest Overnight Visitors | 0 | - | 4.78 | 41,598 |
| Top 20 Football Clubs in Europe | 0 | - | 4.48 | 113,024 |
| The Only Remaining European Country . . . | 0 | - | 4.41 | 63,779 |
| Ancient Greek Trivia | 0 | - | 4.62 | 66,769 |
| Geography of Ancient Greece | 0 | - | 4.69 | 31,767 |
| Figures from Greek Mythology | 0 | - | 4.91 | 184,920 |
| Countries Italy Declared War On | 0 | - | 4.75 | 42,943 |
| Countries Bordering Spain | 0 | - | 4.51 | 69,072 |
| Switzerland Immigration by Country | 0 | - | 4.70 | 29,147 |
| British Spellings | 0 | - | 4.07 | 99,202 |
| British Groups of Things | 0 | - | 4.25 | 82,669 |
| 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 | 24,457 |
| Geography of Scotland | 0 | - | 4.63 | 21,476 |
| Medieval English History | 0 | - | 4.53 | 43,314 |
| U.S. Presidents Quiz | 0 | - | 5.00 | 3,653,629 |
| Deadliest U.S. Wars | 0 | - | 4.89 | 189,233 |
| Countries That Touch the Adriatic Sea | 0 | - | 4.96 | 70,786 |
| Top 10 European Countries by Coastline | 0 | - | 4.89 | 137,842 |
| 100 Longest Rivers in Europe - with a Map | 0 | - | 4.94 | 64,787 |
| Category Elimination - European Countries #1 | 0 | - | 4.89 | 88,961 |
| Countries that Border Poland | 0 | - | 4.99 | 171,336 |
| Non-Bordering Countries Closest to Russia | 0 | - | 4.91 | 82,369 |
| Countries With the Most Russian Speakers | 0 | - | 4.97 | 98,420 |
| Countries that Border Hungary | 0 | - | 4.98 | 103,693 |
| North Macedonia Country Quiz | 0 | - | 4.81 | 27,614 |
| Moldova Country Quiz | 0 | - | 4.81 | 30,538 |
| Countries Bordering Serbia | 0 | - | 4.96 | 91,735 |
| French Geography Quiz #1 | 0 | - | 4.89 | 34,511 |
| Andorra Country Quiz | 0 | - | 4.90 | 31,386 |
| Countries Bordering Austria | 0 | - | 4.97 | 117,772 |
| Countries that Visit France the Most | 0 | - | 4.85 | 45,522 |
| Countries Closest to Metropolitan France | 0 | - | 4.89 | 71,797 |
| Geography of Germany | 0 | - | 4.35 | 17,085 |
| Countries With the Most German Speakers | 0 | - | 4.89 | 94,290 |
| Greek Mythology General Knowledge #2 | 0 | - | 4.59 | 72,890 |
| Ancient Greece - Multiple Choice | 0 | - | 4.54 | 41,428 |
| Counties of Ireland | 0 | - | 4.92 | 193,042 |
| Italian Inventions | 0 | - | 3.81 | 18,411 |
| Countries Bordering Italy | 0 | - | 4.94 | 100,442 |
| Countries Closest to Italy | 0 | - | 4.97 | 196,305 |
| Ancient Roman Trivia #2 | 0 | - | 4.57 | 38,530 |
| Geography of the Roman Empire | 0 | - | 4.56 | 51,662 |
| Roman Names for Places | 0 | - | 4.62 | 57,869 |
| Byzantine History | 0 | - | 4.91 | 28,615 |
| Spanish History A-Z | 0 | - | 4.36 | 19,032 |
| Real Madrid 2010s Starting XI | 0 | - | 4.89 | 66,144 |
| 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 | 8,659 |
| British Geography Quiz #2 | 0 | - | 4.29 | 27,506 |
| Counties of the UK and Ireland | 0 | - | 4.98 | 128,587 |
| Houses of British Monarchs | 0 | - | 4.53 | 65,290 |
| 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 | 434,584 |
| World Capitals Closest to London | 0 | - | 4.87 | 109,711 |
| 50 Busiest Air Routes from London | 0 | - | 4.86 | 95,758 |
| Bridges of London | 0 | - | 4.17 | 10,063 |
| British Sport Trivia | 0 | - | 4.37 | 20,363 |
| 2025–2026 Football League Teams | 0 | - | 4.93 | 397,145 |
| Famous Welsh People | 0 | - | 4.21 | 9,770 |
| Liechtenstein Country Quiz | 0 | - | 4.64 | 26,869 |
