| States of Germany Map Quiz | 0 | - | 4.91 | 131,783 |
| States of Germany | 0 | - | 4.96 | 150,213 |
| Germany Immigration by Country | 0 | - | 4.85 | 80,075 |
| States of the German Confederation in 1848 | 0 | - | 4.89 | 31,560 |
| History of Germany | 0 | - | 4.39 | 52,624 |
| Germany Country Quiz | 0 | - | 4.82 | 156,656 |
| Modern Day Countries of the Spanish Empire on a Map | 0 | - | 4.95 | 85,562 |
| Counties of England | 0 | - | 4.97 | 789,660 |
| Wives of King Henry VIII | 0 | - | 4.55 | 53,204 |
| Countries the UK Declared War On | 0 | - | 4.61 | 121,849 |
| Geography of the British Empire | 0 | - | 4.48 | 39,498 |
| Ancient Greek Trivia | 0 | - | 4.62 | 66,791 |
| Geography of Ancient Greece | 0 | - | 4.69 | 31,776 |
| Medieval English History | 0 | - | 4.53 | 43,332 |
| Countries of Europe in 1815 With a Map | 0 | - | 4.99 | 149,017 |
| Countries of Europe in 1848 | 0 | - | 4.98 | 75,482 |
| Countries of Europe in 1870 with a Map | 0 | - | 4.95 | 63,496 |
| Every Country of Europe Since 1815 With a Map | 0 | - | 4.98 | 70,175 |
| Countries of Europe in 1360 with a Map | 0 | - | 4.99 | 56,073 |
| Regions of France Map Quiz | 0 | - | 4.97 | 143,273 |
| French History Multiple Choice | 0 | - | 4.55 | 32,884 |
| Countries Bordering Germany | 0 | - | 4.99 | 367,202 |
| Regions of Italy | 0 | - | 4.92 | 74,796 |
| Netherlands Immigration by Country | 0 | - | 4.94 | 43,873 |
| Regions of Spain Quiz | 0 | - | 4.90 | 112,440 |
| Cantons of Switzerland | 0 | - | 4.98 | 50,264 |
| Countries and Territories of the United Kingdom | 0 | - | 4.89 | 93,074 |
| Anglo-Saxon and Viking Kings of England | 0 | - | 4.74 | 12,101 |
| Europe Map Quiz | 0 | - | 5.00 | 4,733,140 |
| France Cities Map Quiz | 0 | - | 4.96 | 165,287 |
| Departments of France | 0 | - | 4.93 | 52,890 |
| Germany Cities Map Quiz | 0 | - | 4.86 | 125,218 |
| States of the Holy Roman Empire in 1356 | 0 | - | 4.97 | 72,551 |
| Italy Country Quiz | 0 | - | 4.82 | 122,291 |
| Regions of Italy Map Quiz | 0 | - | 4.96 | 148,458 |
| Italy Cities Map Quiz | 0 | - | 4.97 | 151,149 |
| Countries Surrounding Rome | 0 | - | 4.97 | 49,381 |
| Spain Cities Map Quiz | 0 | - | 4.87 | 96,127 |
| Regions of Spain Map Quiz | 0 | - | 4.95 | 184,710 |
| Modern-Day Countries of the British Empire in 1921 | 0 | - | 4.99 | 116,389 |
| Anglo-Saxon Kingdoms of England | 0 | - | 4.60 | 25,693 |
| Giant Great Britain Millennium Quiz | 0 | - | 4.78 | 20,077 |
| England or Wales? | 0 | - | 4.94 | 45,351 |
| Biggest Countries in Europe in 1700 | 0 | - | 4.73 | 58,173 |
| Countries With the Most German Speakers | 0 | - | 4.89 | 94,467 |
| Name the English Monarchs | 0 | - | 4.92 | 498,225 |
| Embarrassing Chapters in British History | 0 | - | 4.29 | 32,132 |
| History of Scotland | 0 | - | 4.51 | 21,010 |
| Europe by Borders in 30 Seconds | 0 | - | 4.98 | 425,419 |
| Andorra Country Quiz | 0 | - | 4.90 | 31,421 |
| Kings of France Quiz | 0 | - | 4.20 | 32,570 |
| Biggest Cities in Germany in 1910 | 0 | - | 4.41 | 23,390 |
| Countries that Beat Germany | 0 | - | 4.95 | 105,438 |
| Country Quiz on a Map - Germany | 0 | - | 4.95 | 34,500 |
| German Inventions | 0 | - | 3.91 | 30,186 |
| Embarrassing Chapters in German History | 0 | - | 3.41 | 12,577 |
| The Trojan War | 0 | - | 4.83 | 39,456 |
| Letters of the Greek Alphabet | 0 | - | 4.97 | 642,284 |
| Name that Greek Letter | 0 | - | 4.94 | 321,781 |
| Greek Mythology General Knowledge #1 | 0 | - | 4.85 | 110,632 |
| Ancient Roman Trivia #1 | 0 | - | 4.85 | 84,083 |
| Roman Emperors | 0 | - | 4.95 | 118,562 |
| Malta Country Quiz | 0 | - | 4.81 | 30,844 |
| Countries That Use the Euro | 0 | - | 4.95 | 103,122 |
| Europe Cities Map Quiz | 0 | - | 4.99 | 362,448 |
| 10 Easternmost Countries in Europe | 0 | - | 4.89 | 113,674 |
| The Only European Country ... | 0 | - | 4.91 | 214,007 |
| European Countries NOT in NATO | 0 | - | 4.87 | 59,662 |
| Olympian Gods Quiz | 0 | - | 4.96 | 496,597 |
| 101 Figures from Greek Mythology | 0 | - | 4.99 | 124,407 |
| History of The Netherlands | 0 | - | 4.46 | 17,322 |
| Former Dominions of the British Empire | 0 | - | 4.30 | 24,094 |
| Flags of Europe Quiz | 0 | - | 4.99 | 1,227,786 |
| Countries of Europe - One Minute Sprint | 0 | - | 4.94 | 1,320,442 |
| History of Russia Quiz | 0 | - | 4.49 | 31,799 |
| 15 Most Populous Countries that Speak a Germanic Language | 0 | - | 4.39 | 82,325 |
| Ancient Greek Words | 0 | - | 4.92 | 110,746 |
| History of Italy | 0 | - | 4.55 | 31,831 |
| Geography of the Dutch Empire | 0 | - | 4.62 | 34,491 |
| Countries of the Spanish Empire | 0 | - | 4.52 | 76,990 |
| Invasions of Great Britain | 0 | - | 4.51 | 59,537 |
| Oldest Cities in the United Kingdom | 0 | - | 4.39 | 23,622 |
| History of London | 0 | - | 4.33 | 26,104 |
| British History Multiple Choice #1 | 0 | - | 4.46 | 54,971 |
| British History Multiple Choice #2 | 0 | - | 4.42 | 37,844 |
| "Big Five" European Soccer Champions Since 2000 | 0 | - | 4.97 | 350,267 |
| 10 Biggest European Countries by Area | 0 | - | 4.99 | 191,751 |
| 10 Westernmost Countries in Europe | 0 | - | 4.96 | 150,348 |
| Top 10 Languages Spoken in Europe | 0 | - | 4.96 | 216,479 |
| European Landmarks Map Quiz | 0 | - | 4.97 | 86,515 |
| Countries of Europe with an Empty Map | 0 | - | 5.00 | 307,970 |
| All First-Level Subdivisions of Europe on a Map | 0 | - | 4.98 | 168,083 |
| Countries with Territory in the Balkans | 0 | - | 4.96 | 88,320 |
| Eastern Europe Map Quiz | 0 | - | 4.91 | 127,243 |
| Slavic Countries | 0 | - | 4.96 | 110,906 |
| Regions of France | 0 | - | 4.78 | 119,344 |
| France Immigration by Country | 0 | - | 4.72 | 75,990 |
| Largest Islands of Greece | 0 | - | 4.59 | 47,489 |
| Roman Numeral Decoding Quiz | 0 | - | 4.94 | 433,745 |
| Two Letter Roman Numerals | 0 | - | 4.97 | 55,645 |
| Provinces of the Netherlands | 0 | - | 4.80 | 40,855 |
| 100 Greatest Britons Quiz | 0 | - | 4.41 | 48,071 |
| UK Cities Map Quiz | 0 | - | 4.95 | 462,293 |
| Foods in a Full English Breakfast | 0 | - | 4.46 | 102,025 |
| The UK for Americans - True or False | 0 | - | 4.44 | 58,412 |
| Champions League Winners | 0 | - | 4.92 | 996,981 |
| European Geography By Letter - P #1 | 0 | - | 4.81 | 96,372 |
| European Diaspora - Top 11 Countries | 0 | - | 4.90 | 95,076 |
| 10 European Countries with the Most Tourists | 0 | - | 4.98 | 136,462 |
| Three Band Flags of Europe | 0 | - | 4.98 | 191,956 |
| Pixelated Europe Map | 0 | - | 4.88 | 121,867 |
| Monarchies of Europe | 0 | - | 4.90 | 97,370 |
| European Countries with One Border | 0 | - | 4.97 | 181,696 |
| European Countries with the Fewest Borders | 0 | - | 4.97 | 178,597 |
| European Geography By Letter - B #2 | 0 | - | 4.83 | 76,318 |
| Federal Subjects of Russia | 0 | - | 4.94 | 144,167 |
| Countries That Border Russia | 0 | - | 4.98 | 459,065 |
| Countries Formerly in Yugoslavia | 0 | - | 4.95 | 124,251 |
| History of Austria | 0 | - | 4.70 | 17,761 |
| Austria Country Quiz | 0 | - | 4.57 | 59,379 |
| Belgium Country Quiz | 0 | - | 4.70 | 71,281 |
| France Country Quiz | 0 | - | 4.70 | 133,911 |
| French Inventions | 0 | - | 4.08 | 13,866 |
| Geography of the French Empire | 0 | - | 4.48 | 26,943 |
| The French Revolution | 0 | - | 4.46 | 23,790 |
| Countries Bordering France | 0 | - | 4.83 | 399,656 |
| History of Paris | 0 | - | 4.24 | 13,617 |
| History of France | 0 | - | 4.59 | 56,137 |
| German Cities with the Most Tourists | 0 | - | 4.77 | 48,356 |
| Countries Closest to Germany A-Z | 0 | - | 4.98 | 26,952 |
| Greece Country Quiz | 0 | - | 4.74 | 65,789 |
| Figures from Greek Mythology | 0 | - | 4.91 | 185,086 |
| Embarrassing Chapters in Italian History | 0 | - | 4.24 | 12,047 |
| Luxembourg Country Quiz | 0 | - | 4.77 | 33,500 |
| Monaco Country Quiz | 0 | - | 4.47 | 41,264 |
| Netherlands Country Quiz | 0 | - | 4.50 | 80,005 |
| Nordic Cities Map Quiz | 0 | - | 4.74 | 89,791 |
| The Vikings! | 0 | - | 4.46 | 28,251 |
| Sweden Immigration by Country | 0 | - | 4.55 | 55,722 |
| Portugal Country Quiz | 0 | - | 4.69 | 71,384 |
| The Portuguese Empire | 0 | - | 4.54 | 11,997 |
| Spain Country Quiz | 0 | - | 4.45 | 127,680 |
| Switzerland Country Quiz | 0 | - | 4.51 | 62,957 |
| Counties of England Map Quiz | 0 | - | 4.97 | 306,168 |
| United Kingdom A-Z | 0 | - | 4.53 | 87,250 |
| Largest Islands in the British Isles With a Map | 0 | - | 4.52 | 38,572 |
| British Geography Multiple Choice | 0 | - | 4.49 | 43,195 |
| 10 Closest Megacities to London | 0 | - | 4.90 | 17,535 |
| Counties of Wales | 0 | - | 4.63 | 38,921 |
| Countries of the Mongol Empire on a Map | 0 | - | 4.99 | 105,968 |
| U.S. Presidents Quiz | 0 | - | 5.00 | 3,657,264 |
| Deadliest U.S. Wars | 0 | - | 4.89 | 189,343 |
| Top 10 Coldest European Countries | 0 | - | 4.94 | 192,292 |
| Top 10 Hottest European Countries | 0 | - | 4.89 | 126,151 |
| Countries That Touch the Adriatic Sea | 0 | - | 4.96 | 70,804 |
| Top 10 European Countries by Coastline | 0 | - | 4.89 | 137,876 |
| 100 Longest Rivers in Europe - with a Map | 0 | - | 4.94 | 64,868 |
| Category Elimination - European Geography #1 | 0 | - | 4.98 | 230,680 |
| European Map without 10 Random Countries | 0 | - | 4.97 | 274,356 |
| Category Elimination - European Geography #2 | 0 | - | 4.99 | 165,273 |
| Category Elimination - European Countries #1 | 0 | - | 4.89 | 89,025 |
| Name a Valid European Country #1 | 0 | - | 4.99 | 257,015 |
| Name a Valid European Country #2 | 0 | - | 4.94 | 113,323 |
| Countries that Border Poland | 0 | - | 4.99 | 171,420 |
| Russia Country Quiz | 0 | - | 4.85 | 113,692 |
| Non-Bordering Countries Closest to Russia | 0 | - | 4.91 | 82,399 |
| Countries With the Most Russian Speakers | 0 | - | 4.97 | 98,637 |
| Croatia Country Quiz | 0 | - | 4.83 | 42,880 |
| Countries that Border Hungary | 0 | - | 4.98 | 103,731 |
| Bosnia and Herzegovina Country Quiz | 0 | - | 4.86 | 35,060 |
| Countries Bordering Serbia | 0 | - | 4.96 | 91,794 |
| French Geography Quiz #1 | 0 | - | 4.89 | 34,530 |
| Countries Bordering Austria | 0 | - | 4.97 | 117,823 |
| Countries that Visit France the Most | 0 | - | 4.85 | 45,562 |
| Countries Closest to Metropolitan France | 0 | - | 4.89 | 71,836 |
| Embarrassing Chapters in French History | 0 | - | 3.67 | 20,049 |
| Most Popular Baby Girls Names in Germany | 0 | - | 4.51 | 38,636 |
| German History A-Z | 0 | - | 4.49 | 24,330 |
| Counties of Ireland | 0 | - | 4.92 | 193,187 |
| History of Ireland | 0 | - | 4.39 | 30,850 |
| Countries Bordering Italy | 0 | - | 4.94 | 100,482 |
| Countries Italy Declared War On | 0 | - | 4.75 | 42,991 |
| Countries Closest to Italy | 0 | - | 4.97 | 196,394 |
| Byzantine History | 0 | - | 4.91 | 28,636 |
| Canary Islands | 0 | - | 4.61 | 17,407 |
| Biggest Spanish Empire Countries | 0 | - | 4.91 | 115,003 |
| Countries Closest to Spain | 0 | - | 4.96 | 225,390 |
| Switzerland Immigration by Country | 0 | - | 4.70 | 29,183 |
| British Spellings | 0 | - | 4.07 | 99,256 |
| British Groups of Things | 0 | - | 4.25 | 82,701 |
| British Acronyms | 0 | - | 4.39 | 45,629 |
| UK Immigration by Country | 0 | - | 4.94 | 139,742 |
| United Kingdom Decoder | 0 | - | 4.29 | 39,952 |
| United Kingdom Country Quiz | 0 | - | 4.96 | 138,294 |
| Biggest Immigrant Groups by Decade in the UK | 0 | - | 4.62 | 24,513 |
| Counties of the UK and Ireland | 0 | - | 4.98 | 128,741 |
| Geography of Scotland | 0 | - | 4.63 | 21,491 |
| World Capitals Closest to London | 0 | - | 4.87 | 109,784 |
| 50 Busiest Air Routes from London | 0 | - | 4.86 | 95,811 |
| All UEFA Champions League Teams Ever | 0 | - | 4.85 | 128,584 |
