| States of the German Confederation in 1848 | 0 | - | 4.89 | 32,023 |
| Netherlands Immigration by Country | 0 | - | 4.93 | 52,197 |
| Counties of England | 0 | - | 4.97 | 797,098 |
| History of Italy | 0 | - | 4.55 | 31,980 |
| Countries of the Spanish Empire | 0 | - | 4.52 | 77,241 |
| Invasions of Great Britain | 0 | - | 4.51 | 59,874 |
| Europe Map Quiz | 0 | - | 5.00 | 4,763,925 |
| Countries of Europe in 1815 With a Map | 0 | - | 4.99 | 150,427 |
| Countries of Europe in 1848 | 0 | - | 4.99 | 82,089 |
| Countries of Europe in 1870 with a Map | 0 | - | 4.95 | 64,720 |
| Every Country of Europe Since 1815 With a Map | 0 | - | 4.98 | 71,044 |
| Countries of Europe in 1360 with a Map | 0 | - | 4.99 | 56,919 |
| Regions of France Map Quiz | 0 | - | 4.97 | 144,471 |
| States of Germany Map Quiz | 0 | - | 4.91 | 132,863 |
| States of Germany | 0 | - | 4.96 | 152,668 |
| Germany Immigration by Country | 0 | - | 4.85 | 81,063 |
| Regions of Italy | 0 | - | 4.92 | 75,920 |
| History of The Netherlands | 0 | - | 4.46 | 17,437 |
| Regions of Spain Quiz | 0 | - | 4.90 | 113,993 |
| Cantons of Switzerland | 0 | - | 4.98 | 51,231 |
| Countries and Territories of the United Kingdom | 0 | - | 4.90 | 94,019 |
| 10 Closest Megacities to London | 0 | - | 4.90 | 17,707 |
| Biggest Countries in Europe in 1700 | 0 | - | 4.73 | 58,502 |
| Provinces of the Netherlands | 0 | - | 4.80 | 41,373 |
| Europe by Borders in 30 Seconds | 0 | - | 4.98 | 428,291 |
| History of Austria | 0 | - | 4.70 | 17,863 |
| Geography of the French Empire | 0 | - | 4.45 | 27,061 |
| The French Revolution | 0 | - | 4.47 | 23,943 |
| The Vikings! | 0 | - | 4.46 | 28,345 |
| The Portuguese Empire | 0 | - | 4.58 | 12,067 |
| Name the English Monarchs | 0 | - | 4.91 | 502,833 |
| History of France | 0 | - | 4.59 | 56,998 |
| Modern Day Countries of the Spanish Empire on a Map | 0 | - | 4.95 | 86,300 |
| Wives of King Henry VIII | 0 | - | 4.55 | 53,355 |
| Countries the UK Declared War On | 0 | - | 4.61 | 122,501 |
| Geography of the British Empire | 0 | - | 4.48 | 39,678 |
| Malta Country Quiz | 0 | - | 4.81 | 31,068 |
| Countries That Use the Euro | 0 | - | 4.95 | 105,100 |
| Europe Cities Map Quiz | 0 | - | 4.99 | 364,540 |
| 10 Easternmost Countries in Europe | 0 | - | 4.89 | 115,312 |
| The Only European Country ... | 0 | - | 4.91 | 216,722 |
| European Countries NOT in NATO | 0 | - | 4.90 | 61,189 |
| Letters of the Greek Alphabet | 0 | - | 4.97 | 647,612 |
| Name that Greek Letter | 0 | - | 4.93 | 323,496 |
| History of Russia Quiz | 0 | - | 4.47 | 31,921 |
| The Trojan War | 0 | - | 4.83 | 39,735 |
| Greek Mythology General Knowledge #1 | 0 | - | 4.85 | 111,880 |
| Ancient Roman Trivia #1 | 0 | - | 4.85 | 84,545 |
| Roman Emperors | 0 | - | 4.95 | 120,084 |
| Anglo-Saxon and Viking Kings of England | 0 | - | 4.74 | 12,221 |
| Flags of Europe Quiz | 0 | - | 4.99 | 1,244,616 |
| Countries of Europe - One Minute Sprint | 0 | - | 4.94 | 1,328,967 |
| 10 Biggest European Countries by Area | 0 | - | 4.99 | 192,697 |
| 10 Westernmost Countries in Europe | 0 | - | 4.96 | 151,231 |
| Top 10 Languages Spoken in Europe | 0 | - | 4.96 | 218,792 |
| European Landmarks Map Quiz | 0 | - | 4.97 | 87,179 |
| Countries of Europe with an Empty Map | 0 | - | 5.00 | 310,612 |
| All First-Level Subdivisions of Europe on a Map | 0 | - | 4.98 | 171,981 |
| Countries with Territory in the Balkans | 0 | - | 4.96 | 89,314 |
| Eastern Europe Map Quiz | 0 | - | 4.91 | 128,220 |
| Slavic Countries | 0 | - | 4.96 | 111,693 |
| French History Multiple Choice | 0 | - | 4.55 | 33,047 |
| Biggest Cities in Germany in 1910 | 0 | - | 4.40 | 23,487 |
| Germany Multiple Choice | 0 | - | 4.84 | 54,365 |
| History of Germany | 0 | - | 4.39 | 52,826 |
| 101 Figures from Greek Mythology | 0 | - | 4.99 | 126,046 |
| History of Spain | 0 | - | 4.23 | 21,091 |
| Anglo-Saxon Kingdoms of England | 0 | - | 4.60 | 25,752 |
| Giant Great Britain Millennium Quiz | 0 | - | 4.78 | 20,156 |
| "Big Five" European Soccer Champions Since 2000 | 0 | - | 4.97 | 356,172 |
| Regions of France | 0 | - | 4.72 | 120,833 |
| France Immigration by Country | 0 | - | 4.70 | 76,534 |
| Largest Islands of Greece | 0 | - | 4.59 | 48,038 |
| Olympian Gods Quiz | 0 | - | 4.96 | 500,963 |
| Ancient Greek Words | 0 | - | 4.93 | 111,634 |
| 100 Greatest Britons Quiz | 0 | - | 4.41 | 48,275 |
| Foods in a Full English Breakfast | 0 | - | 4.46 | 103,266 |
| The UK for Americans - True or False | 0 | - | 4.43 | 58,635 |
| European Diaspora - Top 11 Countries | 0 | - | 4.90 | 95,882 |
| 10 European Countries with the Most Tourists | 0 | - | 4.98 | 137,576 |
| Three Band Flags of Europe | 0 | - | 4.98 | 193,370 |
| Pixelated Europe Map | 0 | - | 4.88 | 122,786 |
| Monarchies of Europe | 0 | - | 4.90 | 98,169 |
| European Countries with One Border | 0 | - | 4.97 | 182,813 |
| European Countries with the Fewest Borders | 0 | - | 4.97 | 179,614 |
| European Geography By Letter - B #2 | 0 | - | 4.84 | 78,652 |
| Federal Subjects of Russia | 0 | - | 4.95 | 147,387 |
| Countries Formerly in Yugoslavia | 0 | - | 4.95 | 124,925 |
| French Inventions | 0 | - | 4.08 | 13,899 |
| History of Paris | 0 | - | 4.24 | 13,651 |
| States of the Holy Roman Empire in 1356 | 0 | - | 4.98 | 74,281 |
| Embarrassing Chapters in Italian History | 0 | - | 4.24 | 12,105 |
| Two Letter Roman Numerals | 0 | - | 4.97 | 56,155 |
| Netherlands Country Quiz | 0 | - | 4.53 | 80,546 |
| American to British Word Translation | 0 | - | 4.14 | 139,092 |
| Languages of the United Kingdom | 0 | - | 4.13 | 40,903 |
| Counties of England Map Quiz | 0 | - | 4.97 | 307,694 |
| British Geography Multiple Choice | 0 | - | 4.49 | 43,333 |
| Champions League Winners | 0 | - | 4.92 | 1,007,085 |
| Countries of the Mongol Empire on a Map | 0 | - | 4.99 | 106,882 |
| Top 10 Coldest European Countries | 0 | - | 4.94 | 193,146 |
| Top 10 Hottest European Countries | 0 | - | 4.88 | 127,042 |
| Category Elimination - European Geography #1 | 0 | - | 4.98 | 233,341 |
| European Map without 10 Random Countries | 0 | - | 4.97 | 276,885 |
| Category Elimination - European Geography #2 | 0 | - | 4.99 | 167,170 |
| Name a Valid European Country #1 | 0 | - | 4.99 | 261,143 |
| Name a Valid European Country #2 | 0 | - | 4.94 | 114,745 |
| Russia Country Quiz | 0 | - | 4.83 | 114,513 |
| Countries That Border Russia | 0 | - | 4.98 | 461,820 |
| Croatia Country Quiz | 0 | - | 4.83 | 43,358 |
| Bosnia and Herzegovina Country Quiz | 0 | - | 4.86 | 35,352 |
| Andorra Country Quiz | 0 | - | 4.90 | 31,701 |
| France Cities Map Quiz | 0 | - | 4.96 | 166,796 |
| Departments of France | 0 | - | 4.93 | 54,165 |
| Countries Bordering France | 0 | - | 4.83 | 402,624 |
| Germany Country Quiz | 0 | - | 4.83 | 157,891 |
| Germany Cities Map Quiz | 0 | - | 4.87 | 126,377 |
| Countries Bordering Germany | 0 | - | 4.99 | 369,482 |
| Regions of Italy Map Quiz | 0 | - | 4.96 | 149,429 |
| Italy Cities Map Quiz | 0 | - | 4.97 | 152,081 |
| Countries Surrounding Rome | 0 | - | 4.97 | 49,553 |
| Roman Numeral Decoding Quiz | 0 | - | 4.94 | 437,233 |
| Spain Cities Map Quiz | 0 | - | 4.87 | 96,954 |
| Regions of Spain Map Quiz | 0 | - | 4.95 | 185,693 |
| Modern-Day Countries of the British Empire in 1921 | 0 | - | 4.99 | 117,647 |
| Former Dominions of the British Empire | 0 | - | 4.27 | 24,193 |
| England or Wales? | 0 | - | 4.94 | 45,705 |
| All UEFA Champions League Teams Ever | 0 | - | 4.85 | 130,414 |
| European Countries by First 2 Letters | 0 | - | 4.95 | 529,655 |
| European Countries with the Fewest Overnight Visitors | 0 | - | 4.80 | 41,659 |
| Top 20 Football Clubs in Europe | 0 | - | 4.48 | 115,016 |
| The Only Remaining European Country . . . | 0 | - | 4.41 | 64,286 |
| Ancient Greek Trivia | 0 | - | 4.62 | 67,005 |
| Geography of Ancient Greece | 0 | - | 4.69 | 31,914 |
| Figures from Greek Mythology | 0 | - | 4.91 | 187,017 |
| Countries Italy Declared War On | 0 | - | 4.75 | 43,339 |
| Canary Islands | 0 | - | 4.62 | 17,482 |
| Switzerland Immigration by Country | 0 | - | 4.69 | 29,720 |
| British Spellings | 0 | - | 4.06 | 99,459 |
| British Groups of Things | 0 | - | 4.25 | 82,878 |
| British Acronyms | 0 | - | 4.40 | 45,803 |
| United Kingdom Decoder | 0 | - | 4.29 | 40,038 |
| Biggest Immigrant Groups by Decade in the UK | 0 | - | 4.63 | 25,216 |
| English Monarchs in Order by First Letter | 0 | - | 4.38 | 31,824 |
| Geography of Scotland | 0 | - | 4.63 | 21,621 |
| Medieval English History | 0 | - | 4.53 | 43,517 |
| U.S. Presidents Quiz | 0 | - | 5.00 | 3,699,635 |
| Deadliest U.S. Wars | 0 | - | 4.89 | 190,814 |
| Countries That Touch the Adriatic Sea | 0 | - | 4.96 | 71,118 |
| Top 10 European Countries by Coastline | 0 | - | 4.87 | 138,401 |
| 100 Longest Rivers in Europe - with a Map | 0 | - | 4.94 | 65,472 |
| Category Elimination - European Countries #1 | 0 | - | 4.89 | 90,081 |
| Countries that Border Poland | 0 | - | 4.99 | 172,304 |
| Non-Bordering Countries Closest to Russia | 0 | - | 4.91 | 82,864 |
| Countries With the Most Russian Speakers | 0 | - | 4.97 | 100,942 |
| Countries that Border Hungary | 0 | - | 4.98 | 104,243 |
| North Macedonia Country Quiz | 0 | - | 4.81 | 27,881 |
| Moldova Country Quiz | 0 | - | 4.82 | 30,816 |
| Countries Bordering Serbia | 0 | - | 4.96 | 92,419 |
| French Geography Quiz #1 | 0 | - | 4.89 | 34,778 |
| Countries Bordering Austria | 0 | - | 4.97 | 118,338 |
| Countries that Visit France the Most | 0 | - | 4.85 | 45,879 |
| Countries Closest to Metropolitan France | 0 | - | 4.89 | 72,186 |
| Geography of Germany | 0 | - | 4.35 | 17,188 |
| Countries With the Most German Speakers | 0 | - | 4.89 | 96,781 |
| Greek Mythology General Knowledge #2 | 0 | - | 4.59 | 73,689 |
| Ancient Greece - Multiple Choice | 0 | - | 4.54 | 41,666 |
| Counties of Ireland | 0 | - | 4.92 | 195,385 |
| Italian Inventions | 0 | - | 3.81 | 18,444 |
| Countries Bordering Italy | 0 | - | 4.94 | 100,878 |
| Countries Closest to Italy | 0 | - | 4.97 | 198,080 |
| Ancient Roman Trivia #2 | 0 | - | 4.57 | 38,754 |
| Geography of the Roman Empire | 0 | - | 4.56 | 51,940 |
| Roman Names for Places | 0 | - | 4.62 | 58,305 |
| Byzantine History | 0 | - | 4.91 | 28,869 |
| Byzantine Emperors | 0 | - | 4.92 | 14,182 |
| Geography of the Spanish Empire | 0 | - | 4.49 | 37,171 |
| Countries Closest to Spain | 0 | - | 4.96 | 227,028 |
| British to American Word Translation | 0 | - | 3.74 | 255,091 |
| British Foods by Description | 0 | - | 3.94 | 48,331 |
| British and American Word Differences | 0 | - | 2.63 | 46,883 |
| English Inventions #1 | 0 | - | 3.15 | 23,567 |
| English Inventions #2 | 0 | - | 3.95 | 8,703 |
| British Geography Quiz #2 | 0 | - | 4.29 | 27,596 |
| Counties of the UK and Ireland | 0 | - | 4.98 | 130,844 |
| The Reign of Queen Elizabeth I | 0 | - | 4.53 | 31,799 |
| Houses of British Monarchs | 0 | - | 4.53 | 65,681 |
| British History Multiple Choice #1 | 0 | - | 4.46 | 55,159 |
| British History Multiple Choice #2 | 0 | - | 4.42 | 37,967 |
| Prime Ministers of the UK | 0 | - | 4.95 | 439,157 |
| World Capitals Closest to London | 0 | - | 4.88 | 110,676 |
| 50 Busiest Air Routes from London | 0 | - | 4.87 | 96,865 |
| Bridges of London | 0 | - | 4.17 | 10,108 |
| British Sport Trivia | 0 | - | 4.37 | 20,463 |
| 2025–2026 Football League Teams | 0 | - | 4.94 | 401,523 |
| Famous Welsh People | 0 | - | 4.31 | 11,505 |
| Liechtenstein Country Quiz | 0 | - | 4.64 | 27,078 |
| San Marino Country Quiz | 0 | - | 4.73 | 28,990 |
| African Countries by First 2 Letters | 0 | - | 4.96 | 268,249 |
| Colonies of Africa with a Map | 0 | - | 4.78 | 54,455 |
