| States of the German Confederation in 1848 | 0 | - | 4.90 | 31,782 |
| States of Germany Map Quiz | 0 | - | 4.91 | 132,233 |
| States of Germany | 0 | - | 4.96 | 151,229 |
| Germany Immigration by Country | 0 | - | 4.85 | 80,622 |
| History of Germany | 0 | - | 4.39 | 52,735 |
| Germany Country Quiz | 0 | - | 4.82 | 157,256 |
| Modern Day Countries of the Dutch Empire on a Map | 0 | - | 4.86 | 60,744 |
| Countries of Iberia in History with a Map | 0 | - | 4.87 | 41,379 |
| Modern Day Countries of the Spanish Empire on a Map | 0 | - | 4.95 | 85,895 |
| Counties of England | 0 | - | 4.97 | 792,989 |
| Wives of King Henry VIII | 0 | - | 4.55 | 53,272 |
| Countries the UK Declared War On | 0 | - | 4.61 | 122,138 |
| Geography of the British Empire | 0 | - | 4.48 | 39,591 |
| Countries of Europe in 1815 With a Map | 0 | - | 4.99 | 149,602 |
| Countries of Europe in 1848 | 0 | - | 4.98 | 75,912 |
| Countries of Europe in 1870 with a Map | 0 | - | 4.95 | 64,031 |
| Every Country of Europe Since 1815 With a Map | 0 | - | 4.98 | 70,529 |
| Countries of Europe in 1360 with a Map | 0 | - | 4.99 | 56,425 |
| Regions of France Map Quiz | 0 | - | 4.97 | 143,876 |
| Ancient Greek Trivia | 0 | - | 4.62 | 66,880 |
| Geography of Ancient Greece | 0 | - | 4.69 | 31,846 |
| Regions of Italy | 0 | - | 4.92 | 75,277 |
| Netherlands Immigration by Country | 0 | - | 4.93 | 50,294 |
| Regions of Spain Quiz | 0 | - | 4.90 | 113,256 |
| Cantons of Switzerland | 0 | - | 4.98 | 50,784 |
| Countries and Territories of the United Kingdom | 0 | - | 4.89 | 93,385 |
| Medieval English History | 0 | - | 4.53 | 43,413 |
| Europe Map Quiz | 0 | - | 5.00 | 4,747,855 |
| French History Multiple Choice | 0 | - | 4.55 | 32,960 |
| Countries Bordering Germany | 0 | - | 4.99 | 368,110 |
| Anglo-Saxon and Viking Kings of England | 0 | - | 4.74 | 12,155 |
| Biggest Countries in Europe in 1700 | 0 | - | 4.73 | 58,310 |
| France Cities Map Quiz | 0 | - | 4.96 | 166,085 |
| Departments of France | 0 | - | 4.93 | 53,425 |
| Germany Cities Map Quiz | 0 | - | 4.87 | 125,637 |
| States of the Holy Roman Empire in 1356 | 0 | - | 4.97 | 73,240 |
| Italy Country Quiz | 0 | - | 4.82 | 122,746 |
| Regions of Italy Map Quiz | 0 | - | 4.96 | 148,886 |
| Italy Cities Map Quiz | 0 | - | 4.97 | 151,546 |
| Countries Surrounding Rome | 0 | - | 4.97 | 49,454 |
| Spain Cities Map Quiz | 0 | - | 4.87 | 96,483 |
| Regions of Spain Map Quiz | 0 | - | 4.95 | 185,101 |
| Modern-Day Countries of the British Empire in 1921 | 0 | - | 4.99 | 116,933 |
| Name the English Monarchs | 0 | - | 4.92 | 500,360 |
| Anglo-Saxon Kingdoms of England | 0 | - | 4.60 | 25,726 |
| Giant Great Britain Millennium Quiz | 0 | - | 4.78 | 20,115 |
| England or Wales? | 0 | - | 4.94 | 45,509 |
| Europe by Borders in 30 Seconds | 0 | - | 4.98 | 426,709 |
| Biggest Cities in Germany in 1910 | 0 | - | 4.41 | 23,440 |
| Countries With the Most German Speakers | 0 | - | 4.89 | 95,541 |
| Embarrassing Chapters in British History | 0 | - | 4.29 | 32,193 |
| History of Scotland | 0 | - | 4.51 | 21,052 |
| Andorra Country Quiz | 0 | - | 4.90 | 31,547 |
| Kings of France Quiz | 0 | - | 4.20 | 32,638 |
| Countries that Beat Germany | 0 | - | 4.95 | 105,877 |
| Country Quiz on a Map - Germany | 0 | - | 4.95 | 34,787 |
| German Inventions | 0 | - | 3.91 | 30,211 |
| Embarrassing Chapters in German History | 0 | - | 3.41 | 12,604 |
| The Trojan War | 0 | - | 4.83 | 39,584 |
| Letters of the Greek Alphabet | 0 | - | 4.97 | 644,911 |
| Name that Greek Letter | 0 | - | 4.93 | 322,652 |
| Greek Mythology General Knowledge #1 | 0 | - | 4.85 | 111,241 |
| Ancient Roman Trivia #1 | 0 | - | 4.85 | 84,316 |
| Roman Emperors | 0 | - | 4.95 | 119,361 |
| Malta Country Quiz | 0 | - | 4.81 | 30,950 |
| Countries That Use the Euro | 0 | - | 4.95 | 104,059 |
| Europe Cities Map Quiz | 0 | - | 4.99 | 363,352 |
| 10 Easternmost Countries in Europe | 0 | - | 4.89 | 114,397 |
| The Only European Country ... | 0 | - | 4.91 | 215,318 |
| European Countries NOT in NATO | 0 | - | 4.90 | 60,427 |
| History of Russia Quiz | 0 | - | 4.49 | 31,855 |
| 101 Figures from Greek Mythology | 0 | - | 4.99 | 125,170 |
| History of Italy | 0 | - | 4.55 | 31,909 |
| Geography of the Dutch Empire | 0 | - | 4.61 | 34,574 |
| History of The Netherlands | 0 | - | 4.46 | 17,371 |
| Countries of the Spanish Empire | 0 | - | 4.52 | 77,105 |
| Invasions of Great Britain | 0 | - | 4.51 | 59,738 |
| Former Dominions of the British Empire | 0 | - | 4.27 | 24,138 |
| British History Multiple Choice #1 | 0 | - | 4.46 | 55,057 |
| British History Multiple Choice #2 | 0 | - | 4.42 | 37,904 |
| European Countries Ending in "IA" | 0 | - | 4.96 | 67,872 |
| Flags of Europe Quiz | 0 | - | 4.99 | 1,235,683 |
| Countries of Europe - One Minute Sprint | 0 | - | 4.94 | 1,323,910 |
| 10 Biggest European Countries by Area | 0 | - | 4.99 | 192,202 |
| 10 Westernmost Countries in Europe | 0 | - | 4.96 | 150,751 |
| Top 10 Languages Spoken in Europe | 0 | - | 4.96 | 217,576 |
| European Landmarks Map Quiz | 0 | - | 4.97 | 86,809 |
| Countries of Europe with an Empty Map | 0 | - | 5.00 | 309,465 |
| All First-Level Subdivisions of Europe on a Map | 0 | - | 4.98 | 169,658 |
| Countries with Territory in the Balkans | 0 | - | 4.96 | 88,801 |
| Eastern Europe Map Quiz | 0 | - | 4.91 | 127,558 |
| Slavic Countries | 0 | - | 4.96 | 111,301 |
| 15 Most Populous Countries that Speak a Germanic Language | 0 | - | 4.39 | 82,432 |
| Olympian Gods Quiz | 0 | - | 4.96 | 498,641 |
| Ancient Greek Words | 0 | - | 4.93 | 111,154 |
| Oldest Cities in the United Kingdom | 0 | - | 4.39 | 23,671 |
| History of London | 0 | - | 4.33 | 26,139 |
| "Big Five" European Soccer Champions Since 2000 | 0 | - | 4.97 | 352,821 |
| Regions of France | 0 | - | 4.77 | 120,042 |
| France Immigration by Country | 0 | - | 4.72 | 76,251 |
| Largest Islands of Greece | 0 | - | 4.59 | 47,757 |
| Roman Numeral Decoding Quiz | 0 | - | 4.94 | 435,322 |
| Two Letter Roman Numerals | 0 | - | 4.97 | 55,858 |
| Provinces of the Netherlands | 0 | - | 4.80 | 41,100 |
| 100 Greatest Britons Quiz | 0 | - | 4.41 | 48,164 |
| UK Cities Map Quiz | 0 | - | 4.96 | 463,482 |
| Foods in a Full English Breakfast | 0 | - | 4.46 | 102,872 |
| The UK for Americans - True or False | 0 | - | 4.43 | 58,517 |
| Champions League Winners | 0 | - | 4.92 | 1,001,244 |
| European Geography By Letter - P #1 | 0 | - | 4.81 | 96,641 |
| European Diaspora - Top 11 Countries | 0 | - | 4.90 | 95,475 |
| 10 European Countries with the Most Tourists | 0 | - | 4.98 | 136,989 |
| Three Band Flags of Europe | 0 | - | 4.98 | 192,578 |
| Pixelated Europe Map | 0 | - | 4.88 | 122,285 |
| Monarchies of Europe | 0 | - | 4.90 | 97,739 |
| European Countries with One Border | 0 | - | 4.97 | 182,193 |
| European Countries with the Fewest Borders | 0 | - | 4.97 | 179,057 |
| European Geography By Letter - B #2 | 0 | - | 4.84 | 76,726 |
| Federal Subjects of Russia | 0 | - | 4.94 | 145,522 |
| Countries That Border Russia | 0 | - | 4.98 | 460,483 |
| Countries Formerly in Yugoslavia | 0 | - | 4.95 | 124,566 |
| History of Austria | 0 | - | 4.70 | 17,810 |
| Austria Country Quiz | 0 | - | 4.57 | 59,552 |
| Belgium Country Quiz | 0 | - | 4.70 | 71,520 |
| France Country Quiz | 0 | - | 4.70 | 134,543 |
| French Inventions | 0 | - | 4.08 | 13,880 |
| Geography of the French Empire | 0 | - | 4.45 | 27,002 |
| The French Revolution | 0 | - | 4.46 | 23,872 |
| Countries Bordering France | 0 | - | 4.83 | 401,276 |
| History of Paris | 0 | - | 4.24 | 13,631 |
| History of France | 0 | - | 4.59 | 56,657 |
| German Cities with the Most Tourists | 0 | - | 4.77 | 48,623 |
| Countries Closest to Germany A-Z | 0 | - | 4.98 | 27,129 |
| Greece Country Quiz | 0 | - | 4.74 | 66,011 |
| Embarrassing Chapters in Italian History | 0 | - | 4.24 | 12,073 |
| Luxembourg Country Quiz | 0 | - | 4.78 | 33,625 |
| Monaco Country Quiz | 0 | - | 4.47 | 41,376 |
| Netherlands Country Quiz | 0 | - | 4.53 | 80,265 |
| Nordic Cities Map Quiz | 0 | - | 4.77 | 90,284 |
| The Vikings! | 0 | - | 4.46 | 28,290 |
| Sweden Immigration by Country | 0 | - | 4.55 | 55,917 |
| Portugal Country Quiz | 0 | - | 4.69 | 71,620 |
| The Portuguese Empire | 0 | - | 4.58 | 12,033 |
| Spain Country Quiz | 0 | - | 4.45 | 128,097 |
| Switzerland Country Quiz | 0 | - | 4.51 | 63,154 |
| Counties of England Map Quiz | 0 | - | 4.97 | 306,718 |
| United Kingdom A-Z | 0 | - | 4.53 | 87,463 |
| Largest Islands in the British Isles With a Map | 0 | - | 4.52 | 38,641 |
| British Geography Multiple Choice | 0 | - | 4.49 | 43,263 |
| 10 Closest Megacities to London | 0 | - | 4.90 | 17,625 |
| Counties of Wales | 0 | - | 4.63 | 39,079 |
| Countries of the Mongol Empire on a Map | 0 | - | 4.99 | 106,382 |
| Top 10 Coldest European Countries | 0 | - | 4.94 | 192,682 |
| Top 10 Hottest European Countries | 0 | - | 4.88 | 126,555 |
| Category Elimination - European Geography #1 | 0 | - | 4.98 | 231,953 |
| European Map without 10 Random Countries | 0 | - | 4.97 | 275,819 |
| Category Elimination - European Geography #2 | 0 | - | 4.99 | 166,188 |
| Name a Valid European Country #1 | 0 | - | 4.99 | 258,972 |
| Name a Valid European Country #2 | 0 | - | 4.94 | 114,007 |
| Russia Country Quiz | 0 | - | 4.85 | 114,091 |
| Croatia Country Quiz | 0 | - | 4.83 | 43,129 |
| Bosnia and Herzegovina Country Quiz | 0 | - | 4.86 | 35,212 |
| Most Popular Baby Girls Names in Germany | 0 | - | 4.51 | 38,726 |
| German History A-Z | 0 | - | 4.49 | 24,522 |
| Figures from Greek Mythology | 0 | - | 4.91 | 185,952 |
| History of Ireland | 0 | - | 4.39 | 31,029 |
| Countries Italy Declared War On | 0 | - | 4.75 | 43,163 |
| Byzantine History | 0 | - | 4.91 | 28,718 |
| Canary Islands | 0 | - | 4.61 | 17,443 |
| Biggest Spanish Empire Countries | 0 | - | 4.91 | 115,488 |
| Switzerland Immigration by Country | 0 | - | 4.70 | 29,467 |
| British Spellings | 0 | - | 4.06 | 99,364 |
| British Groups of Things | 0 | - | 4.25 | 82,790 |
| British Acronyms | 0 | - | 4.39 | 45,717 |
| UK Immigration by Country | 0 | - | 4.94 | 140,432 |
| United Kingdom Decoder | 0 | - | 4.29 | 39,999 |
| United Kingdom Country Quiz | 0 | - | 4.96 | 139,044 |
| Biggest Immigrant Groups by Decade in the UK | 0 | - | 4.63 | 24,852 |
| Geography of Scotland | 0 | - | 4.63 | 21,560 |
| All UEFA Champions League Teams Ever | 0 | - | 4.85 | 129,349 |
| U.S. Presidents Quiz | 0 | - | 5.00 | 3,676,800 |
| Deadliest U.S. Wars | 0 | - | 4.89 | 189,912 |
| Countries That Touch the Adriatic Sea | 0 | - | 4.96 | 70,950 |
| European Countries with the Fewest Overnight Visitors | 0 | - | 4.78 | 41,630 |
| Top 10 European Countries by Coastline | 0 | - | 4.87 | 138,143 |
| Top 20 Football Clubs in Europe | 0 | - | 4.48 | 113,945 |
| 100 Longest Rivers in Europe - with a Map | 0 | - | 4.94 | 65,167 |
| Category Elimination - European Countries #1 | 0 | - | 4.89 | 89,552 |
| The Only Remaining European Country . . . | 0 | - | 4.41 | 64,037 |
| Countries that Border Poland | 0 | - | 4.99 | 171,835 |
| Non-Bordering Countries Closest to Russia | 0 | - | 4.91 | 82,593 |
| Countries that Beat Russia | 0 | - | 4.81 | 82,285 |
| Countries With the Most Russian Speakers | 0 | - | 4.97 | 99,662 |
| Countries that Border Hungary | 0 | - | 4.98 | 103,959 |
| North Macedonia Country Quiz | 0 | - | 4.81 | 27,735 |
| Moldova Country Quiz | 0 | - | 4.82 | 30,680 |
| Countries Bordering Serbia | 0 | - | 4.96 | 92,102 |
| French Geography Quiz #1 | 0 | - | 4.89 | 34,652 |
| Countries Bordering Austria | 0 | - | 4.97 | 118,056 |
| 20 Questions About France | 0 | - | 4.11 | 32,368 |
