| States of the German Confederation in 1848 | 0 | - | 4.90 | 32,475 |
| Counties of England | 0 | - | 4.97 | 803,356 |
| History of Austria | 0 | - | 4.70 | 17,978 |
| History of France | 0 | - | 4.61 | 57,656 |
| Wives of King Henry VIII | 0 | - | 4.55 | 53,470 |
| Countries the UK Declared War On | 0 | - | 4.55 | 123,294 |
| Geography of the British Empire | 0 | - | 4.48 | 39,852 |
| Countries of Europe in 1815 With a Map | 0 | - | 4.99 | 151,430 |
| Countries of Europe in 1848 | 0 | - | 4.98 | 85,639 |
| Countries of Europe in 1870 with a Map | 0 | - | 4.95 | 65,860 |
| Every Country of Europe Since 1815 With a Map | 0 | - | 4.97 | 71,904 |
| Countries of Europe in 1360 with a Map | 0 | - | 4.99 | 57,627 |
| Regions of France Map Quiz | 0 | - | 4.97 | 145,700 |
| States of Germany Map Quiz | 0 | - | 4.92 | 133,858 |
| States of Germany | 0 | - | 4.95 | 154,656 |
| Germany Immigration by Country | 0 | - | 4.86 | 81,731 |
| Regions of Italy | 0 | - | 4.92 | 77,144 |
| History of Italy | 0 | - | 4.55 | 32,160 |
| Geography of the Dutch Empire | 0 | - | 4.62 | 34,830 |
| Netherlands Immigration by Country | 0 | - | 4.93 | 52,828 |
| Regions of Spain Quiz | 0 | - | 4.90 | 115,412 |
| Countries of the Spanish Empire | 0 | - | 4.52 | 77,435 |
| Cantons of Switzerland | 0 | - | 4.98 | 51,797 |
| Countries and Territories of the United Kingdom | 0 | - | 4.90 | 94,562 |
| Invasions of Great Britain | 0 | - | 4.51 | 60,111 |
| 10 Closest Megacities to London | 0 | - | 4.90 | 17,844 |
| Europe Map Quiz | 0 | - | 5.00 | 4,789,754 |
| Anglo-Saxon and Viking Kings of England | 0 | - | 4.75 | 12,346 |
| Biggest Countries in Europe in 1700 | 0 | - | 4.73 | 58,767 |
| History of Germany | 0 | - | 4.39 | 52,981 |
| Anglo-Saxon Kingdoms of England | 0 | - | 4.60 | 25,828 |
| Giant Great Britain Millennium Quiz | 0 | - | 4.78 | 20,246 |
| Europe by Borders in 30 Seconds | 0 | - | 4.98 | 431,072 |
| Geography of the French Empire | 0 | - | 4.45 | 27,221 |
| The French Revolution | 0 | - | 4.47 | 24,153 |
| Biggest Cities in Germany in 1910 | 0 | - | 4.41 | 23,564 |
| The Vikings! | 0 | - | 4.46 | 28,409 |
| The Portuguese Empire | 0 | - | 4.58 | 12,113 |
| Name the English Monarchs | 0 | - | 4.91 | 506,837 |
| Letters of the Greek Alphabet | 0 | - | 4.97 | 652,265 |
| Name that Greek Letter | 0 | - | 4.93 | 325,080 |
| Modern Day Countries of the Dutch Empire on a Map | 0 | - | 4.87 | 61,704 |
| Modern Day Countries of the Spanish Empire on a Map | 0 | - | 4.95 | 86,909 |
| Malta Country Quiz | 0 | - | 4.81 | 31,242 |
| Countries That Use the Euro | 0 | - | 4.95 | 106,941 |
| Europe Cities Map Quiz | 0 | - | 4.99 | 366,340 |
| 10 Easternmost Countries in Europe | 0 | - | 4.87 | 117,269 |
| The Only European Country ... | 0 | - | 4.91 | 219,223 |
| European Countries NOT in NATO | 0 | - | 4.91 | 62,628 |
| The Trojan War | 0 | - | 4.83 | 40,008 |
| Greek Mythology General Knowledge #1 | 0 | - | 4.85 | 113,025 |
| Ancient Roman Trivia #1 | 0 | - | 4.85 | 85,618 |
| Roman Emperors | 0 | - | 4.95 | 121,280 |
| History of The Netherlands | 0 | - | 4.46 | 17,558 |
| History of Russia Quiz | 0 | - | 4.47 | 32,009 |
| French History Multiple Choice | 0 | - | 4.55 | 33,249 |
| 101 Figures from Greek Mythology | 0 | - | 4.99 | 127,647 |
| Former Dominions of the British Empire | 0 | - | 4.27 | 24,277 |
| Flags of Europe Quiz | 0 | - | 4.99 | 1,259,184 |
| Countries of Europe - One Minute Sprint | 0 | - | 4.94 | 1,336,244 |
| 10 Biggest European Countries by Area | 0 | - | 4.99 | 193,633 |
| 10 Westernmost Countries in Europe | 0 | - | 4.96 | 152,138 |
| Top 10 Languages Spoken in Europe | 0 | - | 4.96 | 220,963 |
| European Landmarks Map Quiz | 0 | - | 4.97 | 87,831 |
| Countries of Europe with an Empty Map | 0 | - | 5.00 | 312,900 |
| All First-Level Subdivisions of Europe on a Map | 0 | - | 4.99 | 176,048 |
| Countries with Territory in the Balkans | 0 | - | 4.96 | 90,240 |
| Eastern Europe Map Quiz | 0 | - | 4.91 | 128,826 |
| Slavic Countries | 0 | - | 4.96 | 112,420 |
| Regions of France | 0 | - | 4.70 | 122,178 |
| France Immigration by Country | 0 | - | 4.70 | 76,957 |
| Germany Multiple Choice | 0 | - | 4.84 | 54,709 |
| Largest Islands of Greece | 0 | - | 4.59 | 48,514 |
| Olympian Gods Quiz | 0 | - | 4.96 | 503,936 |
| Ancient Greek Words | 0 | - | 4.93 | 112,533 |
| Provinces of the Netherlands | 0 | - | 4.80 | 41,815 |
| History of Spain | 0 | - | 4.23 | 21,166 |
| 100 Greatest Britons Quiz | 0 | - | 4.41 | 48,416 |
| Foods in a Full English Breakfast | 0 | - | 4.46 | 103,860 |
| The UK for Americans - True or False | 0 | - | 4.43 | 58,824 |
| "Big Five" European Soccer Champions Since 2000 | 0 | - | 4.97 | 361,984 |
| European Geography By Letter - P #1 | 0 | - | 4.81 | 99,025 |
| European Diaspora - Top 11 Countries | 0 | - | 4.88 | 96,883 |
| 10 European Countries with the Most Tourists | 0 | - | 4.98 | 138,589 |
| Three Band Flags of Europe | 0 | - | 4.98 | 194,668 |
| Pixelated Europe Map | 0 | - | 4.88 | 123,518 |
| Monarchies of Europe | 0 | - | 4.90 | 98,924 |
| European Countries with One Border | 0 | - | 4.97 | 183,873 |
| European Countries with the Fewest Borders | 0 | - | 4.97 | 180,595 |
| European Geography By Letter - B #2 | 0 | - | 4.87 | 88,946 |
| Federal Subjects of Russia | 0 | - | 4.95 | 149,636 |
| Countries Formerly in Yugoslavia | 0 | - | 4.95 | 125,504 |
| French Inventions | 0 | - | 4.10 | 13,929 |
| History of Paris | 0 | - | 4.24 | 13,682 |
| States of the Holy Roman Empire in 1356 | 0 | - | 4.97 | 75,437 |
| Embarrassing Chapters in Italian History | 0 | - | 4.24 | 12,168 |
| Roman Numeral Decoding Quiz | 0 | - | 4.94 | 439,989 |
| Two Letter Roman Numerals | 0 | - | 4.97 | 56,534 |
| Counties of England Map Quiz | 0 | - | 4.97 | 309,123 |
| Champions League Winners | 0 | - | 4.92 | 1,016,702 |
| Modern-Day Countries of the Holy Roman Empire on a Map | 0 | - | 4.93 | 45,938 |
| Countries That Border Russia | 0 | - | 4.98 | 464,626 |
| Countries Bordering France | 0 | - | 4.83 | 405,042 |
| Countries Bordering Germany | 0 | - | 4.99 | 371,972 |
| American to British Word Translation | 0 | - | 4.14 | 139,739 |
| Languages of the United Kingdom | 0 | - | 4.14 | 41,069 |
| British Geography Multiple Choice | 0 | - | 4.49 | 43,463 |
| Top 10 Coldest European Countries | 0 | - | 4.94 | 193,955 |
| Top 10 Hottest European Countries | 0 | - | 4.88 | 127,850 |
| Category Elimination - European Geography #1 | 0 | - | 4.98 | 236,012 |
| European Map without 10 Random Countries | 0 | - | 4.97 | 279,016 |
| Category Elimination - European Geography #2 | 0 | - | 4.99 | 169,025 |
| Name a Valid European Country #1 | 0 | - | 4.99 | 264,831 |
| Name a Valid European Country #2 | 0 | - | 4.94 | 115,952 |
| Russia Country Quiz | 0 | - | 4.83 | 115,353 |
| Croatia Country Quiz | 0 | - | 4.83 | 43,777 |
| Bosnia and Herzegovina Country Quiz | 0 | - | 4.83 | 35,605 |
| Andorra Country Quiz | 0 | - | 4.91 | 31,953 |
| France Cities Map Quiz | 0 | - | 4.96 | 167,863 |
| Departments of France | 0 | - | 4.93 | 55,235 |
| Germany Country Quiz | 0 | - | 4.82 | 158,902 |
| Germany Cities Map Quiz | 0 | - | 4.87 | 127,123 |
| Ancient Greek Trivia | 0 | - | 4.62 | 67,250 |
| Geography of Ancient Greece | 0 | - | 4.69 | 32,053 |
| Most-Mentioned Characters in the Iliad | 0 | - | 4.81 | 20,982 |
| Figures from Greek Mythology | 0 | - | 4.91 | 188,965 |
| Regions of Italy Map Quiz | 0 | - | 4.96 | 150,284 |
| Italy Cities Map Quiz | 0 | - | 4.97 | 153,089 |
| Countries Italy Declared War On | 0 | - | 4.70 | 46,081 |
| Countries Surrounding Rome | 0 | - | 4.97 | 49,753 |
| Spain Cities Map Quiz | 0 | - | 4.87 | 97,533 |
| Regions of Spain Map Quiz | 0 | - | 4.95 | 186,925 |
| Canary Islands | 0 | - | 4.62 | 17,543 |
| Switzerland Immigration by Country | 0 | - | 4.69 | 30,093 |
| British Spellings | 0 | - | 4.06 | 99,613 |
| British Groups of Things | 0 | - | 4.26 | 83,027 |
| British Acronyms | 0 | - | 4.40 | 45,949 |
| United Kingdom Decoder | 0 | - | 4.29 | 40,117 |
| Biggest Immigrant Groups by Decade in the UK | 0 | - | 4.63 | 25,766 |
| Modern-Day Countries of the British Empire in 1921 | 0 | - | 4.99 | 118,850 |
| English Monarchs in Order by First Letter | 0 | - | 4.38 | 32,157 |
| Geography of Scotland | 0 | - | 4.63 | 21,749 |
| Medieval English History | 0 | - | 4.53 | 43,662 |
| England or Wales? | 0 | - | 4.94 | 45,985 |
| All UEFA Champions League Teams Ever | 0 | - | 4.85 | 132,253 |
| Countries of the Mongol Empire on a Map | 0 | - | 4.99 | 107,582 |
| U.S. Presidents Quiz | 0 | - | 5.00 | 3,727,458 |
| Deadliest U.S. Wars | 0 | - | 4.89 | 191,836 |
| European Countries by First 2 Letters | 0 | - | 4.95 | 532,663 |
| Countries That Touch the Adriatic Sea | 0 | - | 4.96 | 71,372 |
| European Countries with the Fewest Overnight Visitors | 0 | - | 4.80 | 41,724 |
| Top 10 European Countries by Coastline | 0 | - | 4.86 | 138,761 |
| Top 20 Football Clubs in Europe | 0 | - | 4.48 | 122,732 |
| 100 Longest Rivers in Europe - with a Map | 0 | - | 4.94 | 65,982 |
| Category Elimination - European Countries #1 | 0 | - | 4.90 | 91,142 |
| The Only Remaining European Country . . . | 0 | - | 4.41 | 64,710 |
| Countries that Border Poland | 0 | - | 4.99 | 173,223 |
| Non-Bordering Countries Closest to Russia | 0 | - | 4.91 | 83,298 |
| Countries With the Most Russian Speakers | 0 | - | 4.97 | 102,978 |
| Countries that Border Hungary | 0 | - | 4.98 | 105,033 |
| North Macedonia Country Quiz | 0 | - | 4.81 | 28,063 |
| Moldova Country Quiz | 0 | - | 4.82 | 31,041 |
| Countries Bordering Serbia | 0 | - | 4.96 | 93,125 |
| French Geography Quiz #1 | 0 | - | 4.89 | 35,106 |
| Countries Bordering Austria | 0 | - | 4.97 | 118,968 |
| Countries that Visit France the Most | 0 | - | 4.85 | 46,170 |
| Countries Closest to Metropolitan France | 0 | - | 4.89 | 72,508 |
| Embarrassing Chapters in French History | 0 | - | 3.65 | 20,174 |
| Geography of Germany | 0 | - | 4.35 | 17,292 |
| Countries With the Most German Speakers | 0 | - | 4.89 | 98,786 |
| Greek Mythology General Knowledge #2 | 0 | - | 4.59 | 74,348 |
| Ancient Greece - Multiple Choice | 0 | - | 4.54 | 41,861 |
| Counties of Ireland | 0 | - | 4.92 | 197,409 |
| Countries Bordering Italy | 0 | - | 4.94 | 101,284 |
| Countries Closest to Italy | 0 | - | 4.97 | 199,457 |
| Ancient Roman Trivia #2 | 0 | - | 4.61 | 44,325 |
| Geography of the Roman Empire | 0 | - | 4.55 | 52,222 |
| Roman Names for Places | 0 | - | 4.62 | 58,731 |
| Byzantine History | 0 | - | 4.91 | 29,030 |
| Byzantine Emperors | 0 | - | 4.93 | 14,617 |
| Geography of the Spanish Empire | 0 | - | 4.49 | 37,318 |
| Countries Closest to Spain | 0 | - | 4.96 | 228,201 |
| British to American Word Translation | 0 | - | 3.74 | 255,359 |
| British Foods by Description | 0 | - | 3.94 | 48,394 |
| British and American Word Differences | 0 | - | 2.63 | 46,932 |
| British Geography Quiz #2 | 0 | - | 4.30 | 28,228 |
| Counties of the UK and Ireland | 0 | - | 4.98 | 132,478 |
| The Reign of Queen Elizabeth I | 0 | - | 4.53 | 31,981 |
| Houses of British Monarchs | 0 | - | 4.54 | 65,977 |
| British History Multiple Choice #1 | 0 | - | 4.46 | 55,330 |
| British History Multiple Choice #2 | 0 | - | 4.42 | 38,097 |
| Prime Ministers of the UK | 0 | - | 4.95 | 442,594 |
| World Capitals Closest to London | 0 | - | 4.88 | 111,090 |
| 50 Busiest Air Routes from London | 0 | - | 4.87 | 97,331 |
| Bridges of London | 0 | - | 4.17 | 10,147 |
| British Sport Trivia | 0 | - | 4.39 | 20,533 |
| 2026–2027 Football League Teams | 0 | - | 4.94 | 407,260 |
| Famous Welsh People | 0 | - | 4.34 | 11,699 |
| Liechtenstein Country Quiz | 0 | - | 4.64 | 27,231 |
| San Marino Country Quiz | 0 | - | 4.72 | 29,135 |
