| States of the German Confederation in 1848 | 0 | - | 4.89 | 31,928 |
| States of Germany Map Quiz | 0 | - | 4.91 | 132,679 |
| States of Germany | 0 | - | 4.96 | 152,196 |
| Germany Immigration by Country | 0 | - | 4.85 | 80,954 |
| History of Germany | 0 | - | 4.39 | 52,794 |
| Germany Country Quiz | 0 | - | 4.82 | 157,714 |
| Modern Day Countries of the Dutch Empire on a Map | 0 | - | 4.86 | 61,012 |
| Countries of Iberia in History with a Map | 0 | - | 4.87 | 41,708 |
| Modern Day Countries of the Spanish Empire on a Map | 0 | - | 4.95 | 86,179 |
| Counties of England | 0 | - | 4.97 | 795,651 |
| Wives of King Henry VIII | 0 | - | 4.55 | 53,319 |
| Countries the UK Declared War On | 0 | - | 4.61 | 122,385 |
| Geography of the British Empire | 0 | - | 4.48 | 39,646 |
| Countries of Europe in 1815 With a Map | 0 | - | 4.99 | 150,035 |
| Countries of Europe in 1848 | 0 | - | 4.99 | 80,013 |
| Countries of Europe in 1870 with a Map | 0 | - | 4.95 | 64,469 |
| Every Country of Europe Since 1815 With a Map | 0 | - | 4.98 | 70,833 |
| Countries of Europe in 1360 with a Map | 0 | - | 4.99 | 56,735 |
| Regions of France Map Quiz | 0 | - | 4.97 | 144,269 |
| Ancient Greek Trivia | 0 | - | 4.62 | 66,964 |
| Geography of Ancient Greece | 0 | - | 4.69 | 31,893 |
| Regions of Italy | 0 | - | 4.92 | 75,714 |
| Netherlands Immigration by Country | 0 | - | 4.93 | 52,026 |
| Regions of Spain Quiz | 0 | - | 4.90 | 113,775 |
| Cantons of Switzerland | 0 | - | 4.98 | 51,105 |
| Countries and Territories of the United Kingdom | 0 | - | 4.89 | 93,922 |
| Medieval English History | 0 | - | 4.53 | 43,489 |
| Europe Map Quiz | 0 | - | 5.00 | 4,758,681 |
| French History Multiple Choice | 0 | - | 4.55 | 33,014 |
| Countries Bordering Germany | 0 | - | 4.99 | 368,905 |
| Anglo-Saxon and Viking Kings of England | 0 | - | 4.74 | 12,195 |
| Biggest Countries in Europe in 1700 | 0 | - | 4.73 | 58,444 |
| Andorra Country Quiz | 0 | - | 4.90 | 31,648 |
| France Cities Map Quiz | 0 | - | 4.96 | 166,589 |
| Departments of France | 0 | - | 4.93 | 53,967 |
| Germany Cities Map Quiz | 0 | - | 4.87 | 125,995 |
| States of the Holy Roman Empire in 1356 | 0 | - | 4.97 | 73,853 |
| Italy Country Quiz | 0 | - | 4.82 | 123,291 |
| Regions of Italy Map Quiz | 0 | - | 4.96 | 149,221 |
| Italy Cities Map Quiz | 0 | - | 4.97 | 151,894 |
| Countries Surrounding Rome | 0 | - | 4.97 | 49,531 |
| Spain Cities Map Quiz | 0 | - | 4.87 | 96,797 |
| Regions of Spain Map Quiz | 0 | - | 4.95 | 185,499 |
| Modern-Day Countries of the British Empire in 1921 | 0 | - | 4.99 | 117,399 |
| Name the English Monarchs | 0 | - | 4.91 | 502,008 |
| Anglo-Saxon Kingdoms of England | 0 | - | 4.60 | 25,744 |
| Giant Great Britain Millennium Quiz | 0 | - | 4.78 | 20,139 |
| England or Wales? | 0 | - | 4.94 | 45,640 |
| Europe by Borders in 30 Seconds | 0 | - | 4.98 | 427,844 |
| Countries With the Most German Speakers | 0 | - | 4.89 | 96,380 |
| Embarrassing Chapters in British History | 0 | - | 4.29 | 32,238 |
| History of Scotland | 0 | - | 4.51 | 21,083 |
| Kings of France Quiz | 0 | - | 4.20 | 32,699 |
| Countries that Beat Germany | 0 | - | 4.95 | 106,230 |
| Country Quiz on a Map - Germany | 0 | - | 4.95 | 34,970 |
| German Inventions | 0 | - | 3.91 | 30,230 |
| Embarrassing Chapters in German History | 0 | - | 3.40 | 12,621 |
| The Trojan War | 0 | - | 4.83 | 39,677 |
| Letters of the Greek Alphabet | 0 | - | 4.97 | 646,672 |
| Name that Greek Letter | 0 | - | 4.93 | 323,258 |
| Greek Mythology General Knowledge #1 | 0 | - | 4.85 | 111,672 |
| Ancient Roman Trivia #1 | 0 | - | 4.85 | 84,471 |
| Roman Emperors | 0 | - | 4.95 | 119,797 |
| Malta Country Quiz | 0 | - | 4.81 | 31,025 |
| Countries That Use the Euro | 0 | - | 4.95 | 104,748 |
| Europe Cities Map Quiz | 0 | - | 4.99 | 364,198 |
| 10 Easternmost Countries in Europe | 0 | - | 4.89 | 115,018 |
| The Only European Country ... | 0 | - | 4.91 | 216,274 |
| European Countries NOT in NATO | 0 | - | 4.90 | 60,936 |
| History of Russia Quiz | 0 | - | 4.47 | 31,899 |
| 101 Figures from Greek Mythology | 0 | - | 4.99 | 125,732 |
| History of Italy | 0 | - | 4.55 | 31,957 |
| Geography of the Dutch Empire | 0 | - | 4.61 | 34,638 |
| History of The Netherlands | 0 | - | 4.46 | 17,423 |
| Countries of the Spanish Empire | 0 | - | 4.52 | 77,199 |
| Invasions of Great Britain | 0 | - | 4.51 | 59,826 |
| Former Dominions of the British Empire | 0 | - | 4.27 | 24,173 |
| British History Multiple Choice #1 | 0 | - | 4.46 | 55,121 |
| British History Multiple Choice #2 | 0 | - | 4.42 | 37,931 |
| European Countries Ending in "IA" | 0 | - | 4.96 | 68,199 |
| Flags of Europe Quiz | 0 | - | 4.99 | 1,241,857 |
| Countries of Europe - One Minute Sprint | 0 | - | 4.94 | 1,327,179 |
| 10 Biggest European Countries by Area | 0 | - | 4.99 | 192,547 |
| 10 Westernmost Countries in Europe | 0 | - | 4.96 | 151,077 |
| Top 10 Languages Spoken in Europe | 0 | - | 4.96 | 218,399 |
| European Landmarks Map Quiz | 0 | - | 4.97 | 87,056 |
| Countries of Europe with an Empty Map | 0 | - | 5.00 | 310,203 |
| All First-Level Subdivisions of Europe on a Map | 0 | - | 4.99 | 171,052 |
| Countries with Territory in the Balkans | 0 | - | 4.96 | 89,136 |
| Eastern Europe Map Quiz | 0 | - | 4.91 | 127,918 |
| Slavic Countries | 0 | - | 4.96 | 111,559 |
| Biggest Cities in Germany in 1910 | 0 | - | 4.40 | 23,468 |
| 15 Most Populous Countries that Speak a Germanic Language | 0 | - | 4.39 | 82,526 |
| Olympian Gods Quiz | 0 | - | 4.96 | 500,257 |
| Ancient Greek Words | 0 | - | 4.93 | 111,459 |
| Oldest Cities in the United Kingdom | 0 | - | 4.39 | 23,702 |
| History of London | 0 | - | 4.33 | 26,181 |
| "Big Five" European Soccer Champions Since 2000 | 0 | - | 4.97 | 355,189 |
| Regions of France | 0 | - | 4.75 | 120,575 |
| France Immigration by Country | 0 | - | 4.70 | 76,453 |
| Largest Islands of Greece | 0 | - | 4.59 | 47,942 |
| Roman Numeral Decoding Quiz | 0 | - | 4.94 | 436,660 |
| Two Letter Roman Numerals | 0 | - | 4.97 | 56,057 |
| Provinces of the Netherlands | 0 | - | 4.80 | 41,295 |
| 100 Greatest Britons Quiz | 0 | - | 4.41 | 48,246 |
| UK Cities Map Quiz | 0 | - | 4.96 | 464,221 |
| Foods in a Full English Breakfast | 0 | - | 4.46 | 103,149 |
| The UK for Americans - True or False | 0 | - | 4.43 | 58,604 |
| Champions League Winners | 0 | - | 4.92 | 1,005,384 |
| European Diaspora - Top 11 Countries | 0 | - | 4.90 | 95,745 |
| 10 European Countries with the Most Tourists | 0 | - | 4.98 | 137,374 |
| Three Band Flags of Europe | 0 | - | 4.98 | 193,094 |
| Pixelated Europe Map | 0 | - | 4.88 | 122,624 |
| Monarchies of Europe | 0 | - | 4.90 | 98,033 |
| European Countries with One Border | 0 | - | 4.97 | 182,624 |
| European Countries with the Fewest Borders | 0 | - | 4.97 | 179,442 |
| European Geography By Letter - B #2 | 0 | - | 4.84 | 78,101 |
| Federal Subjects of Russia | 0 | - | 4.95 | 146,767 |
| Countries That Border Russia | 0 | - | 4.98 | 461,385 |
| Countries Formerly in Yugoslavia | 0 | - | 4.95 | 124,805 |
| History of Austria | 0 | - | 4.70 | 17,850 |
| Austria Country Quiz | 0 | - | 4.57 | 59,691 |
| Belgium Country Quiz | 0 | - | 4.70 | 71,738 |
| France Country Quiz | 0 | - | 4.70 | 134,877 |
| French Inventions | 0 | - | 4.08 | 13,892 |
| Geography of the French Empire | 0 | - | 4.45 | 27,042 |
| The French Revolution | 0 | - | 4.46 | 23,921 |
| Countries Bordering France | 0 | - | 4.83 | 402,179 |
| History of Paris | 0 | - | 4.24 | 13,643 |
| History of France | 0 | - | 4.59 | 56,916 |
| German Cities with the Most Tourists | 0 | - | 4.77 | 48,779 |
| Countries Closest to Germany A-Z | 0 | - | 4.98 | 27,261 |
| Greece Country Quiz | 0 | - | 4.74 | 66,195 |
| Embarrassing Chapters in Italian History | 0 | - | 4.24 | 12,091 |
| Luxembourg Country Quiz | 0 | - | 4.78 | 33,722 |
| Monaco Country Quiz | 0 | - | 4.47 | 41,468 |
| Netherlands Country Quiz | 0 | - | 4.53 | 80,462 |
| Nordic Cities Map Quiz | 0 | - | 4.77 | 90,419 |
| The Vikings! | 0 | - | 4.46 | 28,333 |
| Sweden Immigration by Country | 0 | - | 4.55 | 56,085 |
| Portugal Country Quiz | 0 | - | 4.69 | 71,811 |
| The Portuguese Empire | 0 | - | 4.58 | 12,056 |
| Spain Country Quiz | 0 | - | 4.45 | 128,425 |
| Switzerland Country Quiz | 0 | - | 4.51 | 63,314 |
| Counties of England Map Quiz | 0 | - | 4.97 | 307,178 |
| United Kingdom A-Z | 0 | - | 4.51 | 87,617 |
| Largest Islands in the British Isles With a Map | 0 | - | 4.52 | 38,697 |
| British Geography Multiple Choice | 0 | - | 4.49 | 43,303 |
| 10 Closest Megacities to London | 0 | - | 4.90 | 17,682 |
| Counties of Wales | 0 | - | 4.63 | 39,244 |
| Countries of the Mongol Empire on a Map | 0 | - | 4.99 | 106,718 |
| Top 10 Coldest European Countries | 0 | - | 4.94 | 193,024 |
| Top 10 Hottest European Countries | 0 | - | 4.88 | 126,886 |
| Category Elimination - European Geography #1 | 0 | - | 4.98 | 232,916 |
| European Map without 10 Random Countries | 0 | - | 4.97 | 276,506 |
| Category Elimination - European Geography #2 | 0 | - | 4.99 | 166,892 |
| Name a Valid European Country #1 | 0 | - | 4.99 | 260,451 |
| Name a Valid European Country #2 | 0 | - | 4.94 | 114,513 |
| Russia Country Quiz | 0 | - | 4.85 | 114,369 |
| Croatia Country Quiz | 0 | - | 4.83 | 43,286 |
| Bosnia and Herzegovina Country Quiz | 0 | - | 4.86 | 35,317 |
| Most Popular Baby Girls Names in Germany | 0 | - | 4.51 | 38,769 |
| German History A-Z | 0 | - | 4.49 | 24,590 |
| Figures from Greek Mythology | 0 | - | 4.91 | 186,653 |
| History of Ireland | 0 | - | 4.39 | 31,139 |
| Countries Italy Declared War On | 0 | - | 4.75 | 43,283 |
| Byzantine History | 0 | - | 4.91 | 28,785 |
| Canary Islands | 0 | - | 4.62 | 17,470 |
| Biggest Spanish Empire Countries | 0 | - | 4.91 | 115,850 |
| Switzerland Immigration by Country | 0 | - | 4.70 | 29,645 |
| British Spellings | 0 | - | 4.06 | 99,427 |
| British Groups of Things | 0 | - | 4.25 | 82,851 |
| British Acronyms | 0 | - | 4.40 | 45,778 |
| UK Immigration by Country | 0 | - | 4.94 | 140,781 |
| United Kingdom Decoder | 0 | - | 4.29 | 40,027 |
| United Kingdom Country Quiz | 0 | - | 4.96 | 139,618 |
| Biggest Immigrant Groups by Decade in the UK | 0 | - | 4.63 | 25,104 |
| English Monarchs in Order by First Letter | 0 | - | 4.38 | 31,730 |
| Geography of Scotland | 0 | - | 4.63 | 21,604 |
| All UEFA Champions League Teams Ever | 0 | - | 4.85 | 130,109 |
| U.S. Presidents Quiz | 0 | - | 5.00 | 3,692,278 |
| Deadliest U.S. Wars | 0 | - | 4.89 | 190,645 |
| Countries That Touch the Adriatic Sea | 0 | - | 4.96 | 71,077 |
| European Countries with the Fewest Overnight Visitors | 0 | - | 4.80 | 41,649 |
| Top 10 European Countries by Coastline | 0 | - | 4.87 | 138,326 |
| Top 20 Football Clubs in Europe | 0 | - | 4.48 | 114,732 |
| 100 Longest Rivers in Europe - with a Map | 0 | - | 4.94 | 65,391 |
| Category Elimination - European Countries #1 | 0 | - | 4.89 | 89,923 |
| The Only Remaining European Country . . . | 0 | - | 4.41 | 64,205 |
| Countries that Border Poland | 0 | - | 4.99 | 172,156 |
| Non-Bordering Countries Closest to Russia | 0 | - | 4.91 | 82,781 |
| Countries that Beat Russia | 0 | - | 4.81 | 82,552 |
| Countries With the Most Russian Speakers | 0 | - | 4.97 | 100,514 |
| Countries that Border Hungary | 0 | - | 4.98 | 104,150 |
| North Macedonia Country Quiz | 0 | - | 4.81 | 27,827 |
| Moldova Country Quiz | 0 | - | 4.82 | 30,764 |
| Countries Bordering Serbia | 0 | - | 4.96 | 92,324 |
| French Geography Quiz #1 | 0 | - | 4.89 | 34,746 |
| Countries Bordering Austria | 0 | - | 4.97 | 118,240 |
| 20 Questions About France | 0 | - | 4.11 | 32,402 |
