| States of the German Confederation in 1848 | 0 | - | 4.89 | 32,018 |
| Counties of England | 0 | - | 4.97 | 797,057 |
| History of Italy | 0 | - | 4.55 | 31,979 |
| Geography of the Dutch Empire | 0 | - | 4.62 | 34,664 |
| Countries of the Spanish Empire | 0 | - | 4.52 | 77,241 |
| Invasions of Great Britain | 0 | - | 4.51 | 59,873 |
| Europe Map Quiz | 0 | - | 5.00 | 4,763,846 |
| Countries of Europe in 1815 With a Map | 0 | - | 4.99 | 150,424 |
| Countries of Europe in 1848 | 0 | - | 4.99 | 82,061 |
| Countries of Europe in 1870 with a Map | 0 | - | 4.95 | 64,717 |
| Every Country of Europe Since 1815 With a Map | 0 | - | 4.98 | 71,041 |
| Countries of Europe in 1360 with a Map | 0 | - | 4.99 | 56,915 |
| Regions of France Map Quiz | 0 | - | 4.97 | 144,471 |
| States of Germany Map Quiz | 0 | - | 4.91 | 132,860 |
| States of Germany | 0 | - | 4.96 | 152,663 |
| Germany Immigration by Country | 0 | - | 4.85 | 81,061 |
| Regions of Italy | 0 | - | 4.92 | 75,917 |
| Netherlands Immigration by Country | 0 | - | 4.93 | 52,195 |
| Regions of Spain Quiz | 0 | - | 4.90 | 113,990 |
| Cantons of Switzerland | 0 | - | 4.98 | 51,228 |
| Countries and Territories of the United Kingdom | 0 | - | 4.90 | 94,017 |
| 10 Closest Megacities to London | 0 | - | 4.90 | 17,707 |
| Biggest Countries in Europe in 1700 | 0 | - | 4.73 | 58,502 |
| Europe by Borders in 30 Seconds | 0 | - | 4.98 | 428,282 |
| History of Austria | 0 | - | 4.70 | 17,863 |
| Geography of the French Empire | 0 | - | 4.45 | 27,061 |
| The French Revolution | 0 | - | 4.47 | 23,940 |
| The Vikings! | 0 | - | 4.46 | 28,345 |
| Name the English Monarchs | 0 | - | 4.91 | 502,821 |
| History of France | 0 | - | 4.59 | 56,996 |
| Modern Day Countries of the Dutch Empire on a Map | 0 | - | 4.86 | 61,134 |
| Modern Day Countries of the Spanish Empire on a Map | 0 | - | 4.95 | 86,297 |
| Wives of King Henry VIII | 0 | - | 4.55 | 53,354 |
| Countries the UK Declared War On | 0 | - | 4.61 | 122,497 |
| Geography of the British Empire | 0 | - | 4.48 | 39,677 |
| Malta Country Quiz | 0 | - | 4.81 | 31,066 |
| Countries That Use the Euro | 0 | - | 4.95 | 105,089 |
| Europe Cities Map Quiz | 0 | - | 4.99 | 364,538 |
| 10 Easternmost Countries in Europe | 0 | - | 4.89 | 115,304 |
| The Only European Country ... | 0 | - | 4.91 | 216,714 |
| European Countries NOT in NATO | 0 | - | 4.90 | 61,187 |
| Letters of the Greek Alphabet | 0 | - | 4.97 | 647,601 |
| Name that Greek Letter | 0 | - | 4.93 | 323,493 |
| History of The Netherlands | 0 | - | 4.46 | 17,437 |
| History of Russia Quiz | 0 | - | 4.47 | 31,921 |
| The Trojan War | 0 | - | 4.83 | 39,734 |
| Greek Mythology General Knowledge #1 | 0 | - | 4.85 | 111,873 |
| Ancient Roman Trivia #1 | 0 | - | 4.85 | 84,544 |
| Roman Emperors | 0 | - | 4.95 | 120,081 |
| Anglo-Saxon and Viking Kings of England | 0 | - | 4.74 | 12,219 |
| Flags of Europe Quiz | 0 | - | 4.99 | 1,244,582 |
| Countries of Europe - One Minute Sprint | 0 | - | 4.94 | 1,328,919 |
| 10 Biggest European Countries by Area | 0 | - | 4.99 | 192,692 |
| 10 Westernmost Countries in Europe | 0 | - | 4.96 | 151,229 |
| Top 10 Languages Spoken in Europe | 0 | - | 4.96 | 218,780 |
| European Landmarks Map Quiz | 0 | - | 4.97 | 87,177 |
| Countries of Europe with an Empty Map | 0 | - | 5.00 | 310,606 |
| All First-Level Subdivisions of Europe on a Map | 0 | - | 4.98 | 171,970 |
| Countries with Territory in the Balkans | 0 | - | 4.96 | 89,312 |
| Eastern Europe Map Quiz | 0 | - | 4.91 | 128,220 |
| Slavic Countries | 0 | - | 4.96 | 111,692 |
| French History Multiple Choice | 0 | - | 4.55 | 33,047 |
| Biggest Cities in Germany in 1910 | 0 | - | 4.40 | 23,486 |
| Germany Multiple Choice | 0 | - | 4.84 | 54,363 |
| History of Germany | 0 | - | 4.39 | 52,825 |
| 101 Figures from Greek Mythology | 0 | - | 4.99 | 126,040 |
| History of Spain | 0 | - | 4.23 | 21,091 |
| Anglo-Saxon Kingdoms of England | 0 | - | 4.60 | 25,750 |
| Giant Great Britain Millennium Quiz | 0 | - | 4.78 | 20,154 |
| "Big Five" European Soccer Champions Since 2000 | 0 | - | 4.97 | 356,157 |
| Regions of France | 0 | - | 4.72 | 120,830 |
| France Immigration by Country | 0 | - | 4.70 | 76,533 |
| Largest Islands of Greece | 0 | - | 4.59 | 48,036 |
| Olympian Gods Quiz | 0 | - | 4.96 | 500,954 |
| Ancient Greek Words | 0 | - | 4.93 | 111,633 |
| Provinces of the Netherlands | 0 | - | 4.80 | 41,371 |
| 100 Greatest Britons Quiz | 0 | - | 4.41 | 48,274 |
| Foods in a Full English Breakfast | 0 | - | 4.46 | 103,264 |
| The UK for Americans - True or False | 0 | - | 4.43 | 58,634 |
| European Diaspora - Top 11 Countries | 0 | - | 4.90 | 95,877 |
| 10 European Countries with the Most Tourists | 0 | - | 4.98 | 137,571 |
| Three Band Flags of Europe | 0 | - | 4.98 | 193,369 |
| Pixelated Europe Map | 0 | - | 4.88 | 122,783 |
| Monarchies of Europe | 0 | - | 4.90 | 98,168 |
| European Countries with One Border | 0 | - | 4.97 | 182,811 |
| European Countries with the Fewest Borders | 0 | - | 4.97 | 179,610 |
| European Geography By Letter - B #2 | 0 | - | 4.84 | 78,644 |
| Federal Subjects of Russia | 0 | - | 4.95 | 147,359 |
| Countries Formerly in Yugoslavia | 0 | - | 4.95 | 124,923 |
| French Inventions | 0 | - | 4.08 | 13,899 |
| History of Paris | 0 | - | 4.24 | 13,650 |
| States of the Holy Roman Empire in 1356 | 0 | - | 4.98 | 74,279 |
| Embarrassing Chapters in Italian History | 0 | - | 4.24 | 12,105 |
| Two Letter Roman Numerals | 0 | - | 4.97 | 56,152 |
| American to British Word Translation | 0 | - | 4.14 | 139,091 |
| Languages of the United Kingdom | 0 | - | 4.13 | 40,901 |
| Counties of England Map Quiz | 0 | - | 4.97 | 307,689 |
| British Geography Multiple Choice | 0 | - | 4.49 | 43,333 |
| Champions League Winners | 0 | - | 4.92 | 1,007,053 |
| Countries of the Mongol Empire on a Map | 0 | - | 4.99 | 106,881 |
| Top 10 Coldest European Countries | 0 | - | 4.94 | 193,142 |
| Top 10 Hottest European Countries | 0 | - | 4.88 | 127,040 |
| Category Elimination - European Geography #1 | 0 | - | 4.98 | 233,331 |
| European Map without 10 Random Countries | 0 | - | 4.97 | 276,877 |
| Category Elimination - European Geography #2 | 0 | - | 4.99 | 167,163 |
| Name a Valid European Country #1 | 0 | - | 4.99 | 261,131 |
| Name a Valid European Country #2 | 0 | - | 4.94 | 114,743 |
| Russia Country Quiz | 0 | - | 4.83 | 114,510 |
| Countries That Border Russia | 0 | - | 4.98 | 461,812 |
| Croatia Country Quiz | 0 | - | 4.83 | 43,356 |
| Bosnia and Herzegovina Country Quiz | 0 | - | 4.86 | 35,352 |
| Andorra Country Quiz | 0 | - | 4.90 | 31,700 |
| France Cities Map Quiz | 0 | - | 4.96 | 166,793 |
| Departments of France | 0 | - | 4.93 | 54,162 |
| Countries Bordering France | 0 | - | 4.83 | 402,619 |
| Germany Country Quiz | 0 | - | 4.83 | 157,887 |
| Germany Cities Map Quiz | 0 | - | 4.87 | 126,372 |
| Countries Bordering Germany | 0 | - | 4.99 | 369,475 |
| Regions of Italy Map Quiz | 0 | - | 4.96 | 149,426 |
| Italy Cities Map Quiz | 0 | - | 4.97 | 152,081 |
| Countries Surrounding Rome | 0 | - | 4.97 | 49,552 |
| Roman Numeral Decoding Quiz | 0 | - | 4.94 | 437,225 |
| Spain Cities Map Quiz | 0 | - | 4.87 | 96,953 |
| Regions of Spain Map Quiz | 0 | - | 4.95 | 185,690 |
| Modern-Day Countries of the British Empire in 1921 | 0 | - | 4.99 | 117,646 |
| Former Dominions of the British Empire | 0 | - | 4.27 | 24,191 |
| England or Wales? | 0 | - | 4.94 | 45,701 |
| All UEFA Champions League Teams Ever | 0 | - | 4.85 | 130,411 |
| European Countries by First 2 Letters | 0 | - | 4.95 | 529,653 |
| European Countries with the Fewest Overnight Visitors | 0 | - | 4.80 | 41,659 |
| Top 20 Football Clubs in Europe | 0 | - | 4.48 | 115,014 |
| The Only Remaining European Country . . . | 0 | - | 4.41 | 64,283 |
| Ancient Greek Trivia | 0 | - | 4.62 | 67,004 |
| Geography of Ancient Greece | 0 | - | 4.69 | 31,914 |
| Figures from Greek Mythology | 0 | - | 4.91 | 187,014 |
| Countries Italy Declared War On | 0 | - | 4.75 | 43,339 |
| Canary Islands | 0 | - | 4.62 | 17,482 |
| Switzerland Immigration by Country | 0 | - | 4.69 | 29,716 |
| 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 | 25,215 |
| English Monarchs in Order by First Letter | 0 | - | 4.38 | 31,818 |
| Geography of Scotland | 0 | - | 4.63 | 21,621 |
| Medieval English History | 0 | - | 4.53 | 43,515 |
| U.S. Presidents Quiz | 0 | - | 5.00 | 3,699,536 |
| Deadliest U.S. Wars | 0 | - | 4.89 | 190,813 |
| Countries That Touch the Adriatic Sea | 0 | - | 4.96 | 71,118 |
| Top 10 European Countries by Coastline | 0 | - | 4.87 | 138,399 |
| 100 Longest Rivers in Europe - with a Map | 0 | - | 4.94 | 65,471 |
| Category Elimination - European Countries #1 | 0 | - | 4.89 | 90,080 |
| Countries that Border Poland | 0 | - | 4.99 | 172,301 |
| Non-Bordering Countries Closest to Russia | 0 | - | 4.91 | 82,864 |
| Countries With the Most Russian Speakers | 0 | - | 4.97 | 100,937 |
| Countries that Border Hungary | 0 | - | 4.98 | 104,241 |
| North Macedonia Country Quiz | 0 | - | 4.81 | 27,881 |
| Moldova Country Quiz | 0 | - | 4.82 | 30,815 |
| Countries Bordering Serbia | 0 | - | 4.96 | 92,417 |
| French Geography Quiz #1 | 0 | - | 4.89 | 34,778 |
| Countries Bordering Austria | 0 | - | 4.97 | 118,335 |
| 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 | 96,775 |
| Greek Mythology General Knowledge #2 | 0 | - | 4.59 | 73,687 |
| Ancient Greece - Multiple Choice | 0 | - | 4.54 | 41,666 |
| Counties of Ireland | 0 | - | 4.92 | 195,383 |
| Italian Inventions | 0 | - | 3.81 | 18,444 |
| Countries Bordering Italy | 0 | - | 4.94 | 100,878 |
| Countries Closest to Italy | 0 | - | 4.97 | 198,078 |
| Ancient Roman Trivia #2 | 0 | - | 4.57 | 38,753 |
| Geography of the Roman Empire | 0 | - | 4.56 | 51,939 |
| Roman Names for Places | 0 | - | 4.62 | 58,303 |
| Byzantine History | 0 | - | 4.91 | 28,869 |
| Byzantine Emperors | 0 | - | 4.92 | 14,178 |
| Geography of the Spanish Empire | 0 | - | 4.49 | 37,170 |
| Countries Closest to Spain | 0 | - | 4.96 | 227,025 |
| British to American Word Translation | 0 | - | 3.74 | 255,089 |
| 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 | 130,840 |
| The Reign of Queen Elizabeth I | 0 | - | 4.53 | 31,797 |
| Houses of British Monarchs | 0 | - | 4.53 | 65,680 |
| British History Multiple Choice #1 | 0 | - | 4.46 | 55,155 |
| British History Multiple Choice #2 | 0 | - | 4.42 | 37,965 |
| Prime Ministers of the UK | 0 | - | 4.95 | 439,139 |
| World Capitals Closest to London | 0 | - | 4.88 | 110,676 |
| 50 Busiest Air Routes from London | 0 | - | 4.87 | 96,862 |
| Bridges of London | 0 | - | 4.17 | 10,107 |
| British Sport Trivia | 0 | - | 4.37 | 20,462 |
| 2025–2026 Football League Teams | 0 | - | 4.94 | 401,519 |
| Famous Welsh People | 0 | - | 4.31 | 11,505 |
| Liechtenstein Country Quiz | 0 | - | 4.64 | 27,077 |
| San Marino Country Quiz | 0 | - | 4.73 | 28,989 |
| African Countries by First 2 Letters | 0 | - | 4.96 | 268,244 |
| Colonies of Africa with a Map | 0 | - | 4.78 | 54,454 |
