| States of the German Confederation in 1848 | 0 | - | 4.90 | 32,491 |
| Counties of England | 0 | - | 4.97 | 803,692 |
| History of Italy | 0 | - | 4.55 | 32,167 |
| Geography of the Dutch Empire | 0 | - | 4.62 | 34,836 |
| Countries of the Spanish Empire | 0 | - | 4.52 | 77,452 |
| Invasions of Great Britain | 0 | - | 4.51 | 60,120 |
| Europe Map Quiz | 0 | - | 5.00 | 4,791,085 |
| Countries of Europe in 1815 With a Map | 0 | - | 4.99 | 151,482 |
| Countries of Europe in 1848 | 0 | - | 4.98 | 85,790 |
| Countries of Europe in 1870 with a Map | 0 | - | 4.95 | 65,916 |
| Every Country of Europe Since 1815 With a Map | 0 | - | 4.97 | 71,951 |
| Countries of Europe in 1360 with a Map | 0 | - | 4.99 | 57,669 |
| Regions of France Map Quiz | 0 | - | 4.97 | 145,746 |
| States of Germany Map Quiz | 0 | - | 4.92 | 133,921 |
| States of Germany | 0 | - | 4.95 | 154,760 |
| Germany Immigration by Country | 0 | - | 4.86 | 81,756 |
| Regions of Italy | 0 | - | 4.92 | 77,191 |
| Netherlands Immigration by Country | 0 | - | 4.93 | 52,861 |
| Regions of Spain Quiz | 0 | - | 4.90 | 115,475 |
| Cantons of Switzerland | 0 | - | 4.98 | 51,843 |
| Countries and Territories of the United Kingdom | 0 | - | 4.90 | 94,580 |
| 10 Closest Megacities to London | 0 | - | 4.90 | 17,848 |
| Biggest Countries in Europe in 1700 | 0 | - | 4.73 | 58,782 |
| Largest Islands of Greece | 0 | - | 4.59 | 48,540 |
| Europe by Borders in 30 Seconds | 0 | - | 4.98 | 431,181 |
| History of Austria | 0 | - | 4.70 | 17,984 |
| Geography of the French Empire | 0 | - | 4.45 | 27,224 |
| The French Revolution | 0 | - | 4.47 | 24,157 |
| Biggest Cities in Germany in 1910 | 0 | - | 4.41 | 23,568 |
| The Vikings! | 0 | - | 4.46 | 28,418 |
| The Portuguese Empire | 0 | - | 4.58 | 12,116 |
| Name the English Monarchs | 0 | - | 4.91 | 507,042 |
| History of France | 0 | - | 4.61 | 57,680 |
| Modern Day Countries of the Spanish Empire on a Map | 0 | - | 4.95 | 86,957 |
| Wives of King Henry VIII | 0 | - | 4.55 | 53,480 |
| Countries the UK Declared War On | 0 | - | 4.55 | 123,325 |
| Geography of the British Empire | 0 | - | 4.48 | 39,862 |
| Malta Country Quiz | 0 | - | 4.81 | 31,248 |
| Countries That Use the Euro | 0 | - | 4.95 | 107,061 |
| Europe Cities Map Quiz | 0 | - | 4.99 | 366,437 |
| 10 Easternmost Countries in Europe | 0 | - | 4.87 | 117,363 |
| The Only European Country ... | 0 | - | 4.91 | 219,362 |
| European Countries NOT in NATO | 0 | - | 4.91 | 62,715 |
| Ancient Greek Trivia | 0 | - | 4.62 | 67,264 |
| Geography of Ancient Greece | 0 | - | 4.69 | 32,060 |
| Letters of the Greek Alphabet | 0 | - | 4.97 | 652,490 |
| Name that Greek Letter | 0 | - | 4.93 | 325,146 |
| History of The Netherlands | 0 | - | 4.46 | 17,564 |
| History of Russia Quiz | 0 | - | 4.47 | 32,012 |
| The Trojan War | 0 | - | 4.83 | 40,026 |
| Greek Mythology General Knowledge #1 | 0 | - | 4.85 | 113,086 |
| Ancient Roman Trivia #1 | 0 | - | 4.85 | 85,647 |
| Roman Emperors | 0 | - | 4.95 | 121,339 |
| Anglo-Saxon and Viking Kings of England | 0 | - | 4.75 | 12,353 |
| Flags of Europe Quiz | 0 | - | 4.99 | 1,260,021 |
| Countries of Europe - One Minute Sprint | 0 | - | 4.94 | 1,336,620 |
| 10 Biggest European Countries by Area | 0 | - | 4.99 | 193,696 |
| 10 Westernmost Countries in Europe | 0 | - | 4.96 | 152,390 |
| Top 10 Languages Spoken in Europe | 0 | - | 4.96 | 221,080 |
| European Landmarks Map Quiz | 0 | - | 4.97 | 87,864 |
| Countries of Europe with an Empty Map | 0 | - | 5.00 | 312,995 |
| All First-Level Subdivisions of Europe on a Map | 0 | - | 4.99 | 176,228 |
| Countries with Territory in the Balkans | 0 | - | 4.96 | 90,291 |
| Eastern Europe Map Quiz | 0 | - | 4.91 | 128,849 |
| Slavic Countries | 0 | - | 4.96 | 112,454 |
| French History Multiple Choice | 0 | - | 4.55 | 33,255 |
| Germany Multiple Choice | 0 | - | 4.84 | 54,721 |
| History of Germany | 0 | - | 4.39 | 52,990 |
| Ancient Greece - Multiple Choice | 0 | - | 4.54 | 41,877 |
| 101 Figures from Greek Mythology | 0 | - | 4.99 | 127,733 |
| History of Spain | 0 | - | 4.23 | 21,171 |
| Anglo-Saxon Kingdoms of England | 0 | - | 4.60 | 25,831 |
| Giant Great Britain Millennium Quiz | 0 | - | 4.78 | 20,247 |
| "Big Five" European Soccer Champions Since 2000 | 0 | - | 4.97 | 362,239 |
| Regions of France | 0 | - | 4.70 | 122,256 |
| France Immigration by Country | 0 | - | 4.70 | 76,977 |
| Olympian Gods Quiz | 0 | - | 4.96 | 504,139 |
| Ancient Greek Words | 0 | - | 4.93 | 112,581 |
| Provinces of the Netherlands | 0 | - | 4.80 | 41,864 |
| 100 Greatest Britons Quiz | 0 | - | 4.41 | 48,425 |
| Foods in a Full English Breakfast | 0 | - | 4.46 | 103,895 |
| The UK for Americans - True or False | 0 | - | 4.43 | 58,831 |
| European Geography By Letter - P #1 | 0 | - | 4.81 | 99,058 |
| European Diaspora - Top 11 Countries | 0 | - | 4.88 | 96,928 |
| 10 European Countries with the Most Tourists | 0 | - | 4.98 | 138,653 |
| Three Band Flags of Europe | 0 | - | 4.98 | 194,729 |
| Pixelated Europe Map | 0 | - | 4.88 | 123,565 |
| Monarchies of Europe | 0 | - | 4.90 | 98,971 |
| European Countries with One Border | 0 | - | 4.97 | 183,940 |
| European Countries with the Fewest Borders | 0 | - | 4.97 | 180,654 |
| European Geography By Letter - B #2 | 0 | - | 4.87 | 89,004 |
| Federal Subjects of Russia | 0 | - | 4.95 | 149,754 |
| Countries Formerly in Yugoslavia | 0 | - | 4.95 | 125,533 |
| French Inventions | 0 | - | 4.10 | 13,930 |
| History of Paris | 0 | - | 4.24 | 13,684 |
| States of the Holy Roman Empire in 1356 | 0 | - | 4.97 | 75,510 |
| Embarrassing Chapters in Italian History | 0 | - | 4.24 | 12,171 |
| Two Letter Roman Numerals | 0 | - | 4.97 | 56,563 |
| American to British Word Translation | 0 | - | 4.14 | 139,774 |
| Languages of the United Kingdom | 0 | - | 4.14 | 41,081 |
| Counties of England Map Quiz | 0 | - | 4.97 | 309,174 |
| British Geography Multiple Choice | 0 | - | 4.49 | 43,472 |
| Champions League Winners | 0 | - | 4.92 | 1,017,189 |
| Top 10 Coldest European Countries | 0 | - | 4.94 | 194,003 |
| Top 10 Hottest European Countries | 0 | - | 4.88 | 127,889 |
| Category Elimination - European Geography #1 | 0 | - | 4.98 | 236,130 |
| European Map without 10 Random Countries | 0 | - | 4.97 | 279,148 |
| Category Elimination - European Geography #2 | 0 | - | 4.99 | 169,113 |
| Name a Valid European Country #1 | 0 | - | 4.99 | 265,046 |
| Name a Valid European Country #2 | 0 | - | 4.94 | 116,025 |
| Russia Country Quiz | 0 | - | 4.83 | 115,389 |
| Countries That Border Russia | 0 | - | 4.98 | 464,718 |
| Croatia Country Quiz | 0 | - | 4.83 | 43,799 |
| Bosnia and Herzegovina Country Quiz | 0 | - | 4.83 | 35,612 |
| Andorra Country Quiz | 0 | - | 4.91 | 31,972 |
| France Cities Map Quiz | 0 | - | 4.96 | 167,908 |
| Departments of France | 0 | - | 4.93 | 55,286 |
| Countries Bordering France | 0 | - | 4.83 | 405,164 |
| Germany Country Quiz | 0 | - | 4.82 | 158,964 |
| Germany Cities Map Quiz | 0 | - | 4.87 | 127,159 |
| Countries Bordering Germany | 0 | - | 4.99 | 372,069 |
| The Life of Alexander the Great | 0 | - | 4.51 | 18,593 |
| Regions of Italy Map Quiz | 0 | - | 4.96 | 150,335 |
| Italy Cities Map Quiz | 0 | - | 4.97 | 153,143 |
| Countries Surrounding Rome | 0 | - | 4.97 | 49,760 |
| Roman Numeral Decoding Quiz | 0 | - | 4.94 | 440,116 |
| Spain Cities Map Quiz | 0 | - | 4.87 | 97,556 |
| Regions of Spain Map Quiz | 0 | - | 4.95 | 186,965 |
| Modern-Day Countries of the British Empire in 1921 | 0 | - | 4.99 | 118,945 |
| Former Dominions of the British Empire | 0 | - | 4.27 | 24,279 |
| England or Wales? | 0 | - | 4.94 | 45,997 |
| All UEFA Champions League Teams Ever | 0 | - | 4.85 | 132,335 |
| Countries of the Mongol Empire on a Map | 0 | - | 4.99 | 107,636 |
| European Countries by First 2 Letters | 0 | - | 4.95 | 532,816 |
| European Countries with the Fewest Overnight Visitors | 0 | - | 4.80 | 41,728 |
| Top 20 Football Clubs in Europe | 0 | - | 4.48 | 123,273 |
| The Only Remaining European Country . . . | 0 | - | 4.41 | 64,732 |
| Most-Mentioned Characters in the Iliad | 0 | - | 4.81 | 20,994 |
| Figures from Greek Mythology | 0 | - | 4.91 | 189,052 |
| Countries Italy Declared War On | 0 | - | 4.74 | 47,365 |
| Canary Islands | 0 | - | 4.62 | 17,545 |
| Switzerland Immigration by Country | 0 | - | 4.69 | 30,113 |
| British Spellings | 0 | - | 4.06 | 99,619 |
| British Groups of Things | 0 | - | 4.26 | 83,033 |
| British Acronyms | 0 | - | 4.40 | 45,954 |
| United Kingdom Decoder | 0 | - | 4.29 | 40,123 |
| Biggest Immigrant Groups by Decade in the UK | 0 | - | 4.63 | 25,810 |
| English Monarchs in Order by First Letter | 0 | - | 4.38 | 32,178 |
| Geography of Scotland | 0 | - | 4.63 | 21,755 |
| Medieval English History | 0 | - | 4.53 | 43,672 |
| U.S. Presidents Quiz | 0 | - | 5.00 | 3,728,835 |
| Deadliest U.S. Wars | 0 | - | 4.89 | 191,903 |
| Countries That Touch the Adriatic Sea | 0 | - | 4.96 | 71,385 |
| Top 10 European Countries by Coastline | 0 | - | 4.86 | 138,785 |
| 100 Longest Rivers in Europe - with a Map | 0 | - | 4.94 | 66,003 |
| Category Elimination - European Countries #1 | 0 | - | 4.90 | 91,193 |
| Countries that Border Poland | 0 | - | 4.99 | 173,273 |
| Non-Bordering Countries Closest to Russia | 0 | - | 4.91 | 83,322 |
| Countries With the Most Russian Speakers | 0 | - | 4.97 | 103,081 |
| Countries that Border Hungary | 0 | - | 4.98 | 105,057 |
| North Macedonia Country Quiz | 0 | - | 4.81 | 28,075 |
| Moldova Country Quiz | 0 | - | 4.82 | 31,046 |
| Countries Bordering Serbia | 0 | - | 4.96 | 93,158 |
| French Geography Quiz #1 | 0 | - | 4.89 | 35,116 |
| Countries Bordering Austria | 0 | - | 4.97 | 118,998 |
| Countries that Visit France the Most | 0 | - | 4.85 | 46,197 |
| Countries Closest to Metropolitan France | 0 | - | 4.89 | 72,533 |
| Geography of Germany | 0 | - | 4.35 | 17,297 |
| Countries With the Most German Speakers | 0 | - | 4.89 | 98,914 |
| Greek Mythology General Knowledge #2 | 0 | - | 4.59 | 74,388 |
| Counties of Ireland | 0 | - | 4.92 | 197,522 |
| Italian Inventions | 0 | - | 3.81 | 18,480 |
| Countries Bordering Italy | 0 | - | 4.94 | 101,322 |
| Countries Closest to Italy | 0 | - | 4.97 | 199,537 |
| Ancient Roman Trivia #2 | 0 | - | 4.61 | 44,342 |
| Geography of the Roman Empire | 0 | - | 4.55 | 52,242 |
| Roman Names for Places | 0 | - | 4.62 | 58,751 |
| Byzantine History | 0 | - | 4.91 | 29,033 |
| Byzantine Emperors | 0 | - | 4.93 | 14,635 |
| Geography of the Spanish Empire | 0 | - | 4.49 | 37,325 |
| Countries Closest to Spain | 0 | - | 4.96 | 228,271 |
| British to American Word Translation | 0 | - | 3.74 | 255,375 |
| British Foods by Description | 0 | - | 3.94 | 48,397 |
| British and American Word Differences | 0 | - | 2.63 | 46,936 |
| English Inventions #1 | 0 | - | 3.15 | 23,606 |
| English Inventions #2 | 0 | - | 3.95 | 8,729 |
| British Geography Quiz #2 | 0 | - | 4.30 | 28,238 |
| Counties of the UK and Ireland | 0 | - | 4.98 | 132,540 |
| The Reign of Queen Elizabeth I | 0 | - | 4.53 | 31,991 |
| Houses of British Monarchs | 0 | - | 4.54 | 65,993 |
| British History Multiple Choice #1 | 0 | - | 4.46 | 55,342 |
| British History Multiple Choice #2 | 0 | - | 4.42 | 38,100 |
| Prime Ministers of the UK | 0 | - | 4.95 | 442,826 |
| World Capitals Closest to London | 0 | - | 4.88 | 111,108 |
| 50 Busiest Air Routes from London | 0 | - | 4.87 | 97,359 |
| Bridges of London | 0 | - | 4.17 | 10,149 |
| British Sport Trivia | 0 | - | 4.39 | 20,539 |
| 2026–2027 Football League Teams | 0 | - | 4.94 | 407,585 |
| Famous Welsh People | 0 | - | 4.34 | 11,707 |
| Liechtenstein Country Quiz | 0 | - | 4.64 | 27,236 |
