| Name the English Monarchs | 0 | - | 4.92 | 499,904 |
| States of the German Confederation in 1848 | 0 | - | 4.89 | 31,729 |
| The Trojan War | 0 | - | 4.83 | 39,549 |
| Greek Mythology General Knowledge #1 | 0 | - | 4.85 | 111,109 |
| Ancient Roman Trivia #1 | 0 | - | 4.85 | 84,259 |
| Roman Emperors | 0 | - | 4.95 | 119,164 |
| Countries Bordering Germany | 0 | - | 4.99 | 367,921 |
| Germany Country Quiz | 0 | - | 4.82 | 157,125 |
| Countries With the Most German Speakers | 0 | - | 4.89 | 95,298 |
| Modern Day Countries of the Spanish Empire on a Map | 0 | - | 4.95 | 85,804 |
| Countries that Beat Germany | 0 | - | 4.95 | 105,784 |
| Embarrassing Chapters in British History | 0 | - | 4.29 | 32,174 |
| Ancient Greek Trivia | 0 | - | 4.62 | 66,862 |
| Geography of Ancient Greece | 0 | - | 4.69 | 31,833 |
| Medieval English History | 0 | - | 4.53 | 43,388 |
| Countries of Europe in 1815 With a Map | 0 | - | 4.99 | 149,486 |
| Countries of Europe in 1848 | 0 | - | 4.98 | 75,813 |
| Countries of Europe in 1870 with a Map | 0 | - | 4.95 | 63,915 |
| Every Country of Europe Since 1815 With a Map | 0 | - | 4.98 | 70,457 |
| Countries of Europe in 1360 with a Map | 0 | - | 4.99 | 56,327 |
| Countries Bordering France | 0 | - | 4.83 | 401,001 |
| States of Germany Map Quiz | 0 | - | 4.91 | 132,105 |
| States of Germany | 0 | - | 4.96 | 150,988 |
| Germany Immigration by Country | 0 | - | 4.85 | 80,327 |
| Greek Mythology General Knowledge #2 | 0 | - | 4.59 | 73,219 |
| Ancient Greece - Multiple Choice | 0 | - | 4.54 | 41,530 |
| Ancient Roman Trivia #2 | 0 | - | 4.57 | 38,615 |
| Geography of the Roman Empire | 0 | - | 4.56 | 51,773 |
| Roman Names for Places | 0 | - | 4.62 | 58,040 |
| The Reign of Queen Elizabeth I | 0 | - | 4.53 | 31,677 |
| Houses of British Monarchs | 0 | - | 4.53 | 65,456 |
| British History Multiple Choice #1 | 0 | - | 4.46 | 55,036 |
| British History Multiple Choice #2 | 0 | - | 4.42 | 37,891 |
| Europe Map Quiz | 0 | - | 5.00 | 4,744,315 |
| France Cities Map Quiz | 0 | - | 4.96 | 165,647 |
| Departments of France | 0 | - | 4.93 | 53,246 |
| Germany Cities Map Quiz | 0 | - | 4.87 | 125,510 |
| States of the Holy Roman Empire in 1356 | 0 | - | 4.97 | 73,091 |
| Italy Country Quiz | 0 | - | 4.82 | 122,629 |
| Regions of Italy Map Quiz | 0 | - | 4.96 | 148,773 |
| Italy Cities Map Quiz | 0 | - | 4.97 | 151,406 |
| Countries Surrounding Rome | 0 | - | 4.97 | 49,424 |
| Spain Cities Map Quiz | 0 | - | 4.87 | 96,367 |
| Regions of Spain Map Quiz | 0 | - | 4.95 | 185,005 |
| Modern-Day Countries of the British Empire in 1921 | 0 | - | 4.99 | 116,787 |
| England or Wales? | 0 | - | 4.94 | 45,474 |
| Biggest Countries in Europe in 1700 | 0 | - | 4.73 | 58,285 |
| French Geography Quiz #1 | 0 | - | 4.89 | 34,623 |
| Countries Bordering Austria | 0 | - | 4.97 | 118,010 |
| Countries that Visit France the Most | 0 | - | 4.85 | 45,686 |
| Countries Closest to Metropolitan France | 0 | - | 4.89 | 71,961 |
| Counties of Ireland | 0 | - | 4.92 | 193,934 |
| Countries Bordering Italy | 0 | - | 4.94 | 100,623 |
| Countries Closest to Italy | 0 | - | 4.97 | 196,847 |
| Countries Closest to Spain | 0 | - | 4.96 | 226,178 |
| Counties of the UK and Ireland | 0 | - | 4.98 | 129,399 |
| History of Scotland | 0 | - | 4.51 | 21,040 |
| World Capitals Closest to London | 0 | - | 4.87 | 110,019 |
| 50 Busiest Air Routes from London | 0 | - | 4.87 | 95,991 |
| Europe by Borders in 30 Seconds | 0 | - | 4.98 | 426,423 |
| Andorra Country Quiz | 0 | - | 4.90 | 31,519 |
| Kings of France Quiz | 0 | - | 4.20 | 32,623 |
| The Reign of Napoleon | 0 | - | 4.54 | 38,819 |
| Most Popular Baby Girls Names in Germany | 0 | - | 4.51 | 38,713 |
| Biggest Cities in Germany in 1910 | 0 | - | 4.41 | 23,422 |
| Country Quiz on a Map - Germany | 0 | - | 4.95 | 34,722 |
| German Inventions | 0 | - | 3.91 | 30,205 |
| The Life of Alexander the Great | 0 | - | 4.49 | 18,452 |
| Letters of the Greek Alphabet | 0 | - | 4.97 | 644,338 |
| Name that Greek Letter | 0 | - | 4.93 | 322,462 |
| Countries Italy Declared War On | 0 | - | 4.75 | 43,125 |
| Countries that Beat Italy | 0 | - | 4.85 | 54,109 |
| Seven Hills of Rome | 0 | - | 4.70 | 9,134 |
| Countries that Beat Portugal | 0 | - | 4.86 | 58,934 |
| Countries that Beat Spain | 0 | - | 4.94 | 62,641 |
| Commonwealth of Nations Countries | 0 | - | 4.94 | 236,815 |
| English Royal Consorts | 0 | - | 4.37 | 37,260 |
| Countries That Use the Euro | 0 | - | 4.95 | 103,830 |
| Europe Cities Map Quiz | 0 | - | 4.99 | 363,130 |
| 10 Easternmost Countries in Europe | 0 | - | 4.89 | 114,231 |
| The Only European Country ... | 0 | - | 4.91 | 214,995 |
| European Countries NOT in NATO | 0 | - | 4.90 | 60,239 |
| Olympian Gods Quiz | 0 | - | 4.96 | 498,192 |
| 101 Figures from Greek Mythology | 0 | - | 4.99 | 125,002 |
| Flags of Europe Quiz | 0 | - | 4.99 | 1,233,836 |
| Countries of Europe - One Minute Sprint | 0 | - | 4.94 | 1,323,145 |
| History of Russia Quiz | 0 | - | 4.49 | 31,837 |
| French History Multiple Choice | 0 | - | 4.55 | 32,935 |
| 15 Most Populous Countries that Speak a Germanic Language | 0 | - | 4.39 | 82,409 |
| History of Germany | 0 | - | 4.39 | 52,712 |
| Ancient Greek Words | 0 | - | 4.93 | 111,059 |
| History of Italy | 0 | - | 4.55 | 31,892 |
| Geography of the Dutch Empire | 0 | - | 4.62 | 34,554 |
| Countries of the Spanish Empire | 0 | - | 4.52 | 77,084 |
| Counties of England | 0 | - | 4.97 | 792,184 |
| Invasions of Great Britain | 0 | - | 4.51 | 59,702 |
| Oldest Cities in the United Kingdom | 0 | - | 4.39 | 23,661 |
| History of London | 0 | - | 4.33 | 26,124 |
| British History Quiz for Dummies | 0 | - | 4.70 | 78,326 |
| "Big Five" European Soccer Champions Since 2000 | 0 | - | 4.97 | 352,316 |
| 10 Biggest European Countries by Area | 0 | - | 4.99 | 192,099 |
| 10 Westernmost Countries in Europe | 0 | - | 4.96 | 150,671 |
| Top 10 Languages Spoken in Europe | 0 | - | 4.96 | 217,282 |
| European Landmarks Map Quiz | 0 | - | 4.97 | 86,737 |
| Countries of Europe with an Empty Map | 0 | - | 5.00 | 309,189 |
| All First-Level Subdivisions of Europe on a Map | 0 | - | 4.98 | 169,319 |
| Countries with Territory in the Balkans | 0 | - | 4.96 | 88,687 |
| Eastern Europe Map Quiz | 0 | - | 4.91 | 127,501 |
| Slavic Countries | 0 | - | 4.96 | 111,201 |
| Most Popular Baby Boy Names in Germany | 0 | - | 4.34 | 66,973 |
| Ancient Greece A-Z | 0 | - | 4.60 | 23,068 |
| Ancient Greek Inventions | 0 | - | 4.17 | 16,311 |
| Roman Numeral Decoding Quiz | 0 | - | 4.94 | 434,999 |
| Two Letter Roman Numerals | 0 | - | 4.97 | 55,820 |
| UK Cities Map Quiz | 0 | - | 4.95 | 463,136 |
| The Reign of Henry VIII | 0 | - | 4.25 | 27,664 |
| Elizabeth I... or Elizabeth II? | 0 | - | 4.30 | 24,459 |
| Champions League Winners | 0 | - | 4.92 | 1,000,340 |
| European Geography By Letter - P #1 | 0 | - | 4.81 | 96,600 |
| European Diaspora - Top 11 Countries | 0 | - | 4.90 | 95,310 |
| 10 European Countries with the Most Tourists | 0 | - | 4.98 | 136,870 |
| Three Band Flags of Europe | 0 | - | 4.98 | 192,442 |
| Pixelated Europe Map | 0 | - | 4.88 | 122,205 |
| Monarchies of Europe | 0 | - | 4.90 | 97,665 |
| European Countries with One Border | 0 | - | 4.97 | 182,070 |
| European Countries with the Fewest Borders | 0 | - | 4.97 | 178,934 |
| European Geography By Letter - B #2 | 0 | - | 4.84 | 76,652 |
| Federal Subjects of Russia | 0 | - | 4.94 | 145,117 |
| Countries That Border Russia | 0 | - | 4.98 | 460,210 |
| Countries Formerly in Yugoslavia | 0 | - | 4.95 | 124,502 |
| History of Austria | 0 | - | 4.70 | 17,794 |
| Austria Country Quiz | 0 | - | 4.57 | 59,515 |
| Belgium Country Quiz | 0 | - | 4.70 | 71,455 |
| France Country Quiz | 0 | - | 4.70 | 134,439 |
| Regions of France Map Quiz | 0 | - | 4.97 | 143,699 |
| Geography of the French Empire | 0 | - | 4.45 | 26,991 |
| The French Revolution | 0 | - | 4.46 | 23,856 |
| History of France | 0 | - | 4.59 | 56,568 |
| French History A-Z | 0 | - | 4.22 | 24,358 |
| German Cities with the Most Tourists | 0 | - | 4.77 | 48,572 |
| Countries Closest to Germany A-Z | 0 | - | 4.98 | 27,082 |
| Greece Country Quiz | 0 | - | 4.74 | 65,956 |
| Figures from Greek Mythology | 0 | - | 4.91 | 185,764 |
| Regions of Italy | 0 | - | 4.92 | 75,138 |
| Embarrassing Chapters in Italian History | 0 | - | 4.24 | 12,066 |
| Luxembourg Country Quiz | 0 | - | 4.77 | 33,598 |
| Monaco Country Quiz | 0 | - | 4.47 | 41,347 |
| Netherlands Country Quiz | 0 | - | 4.53 | 80,201 |
| Netherlands Immigration by Country | 0 | - | 4.94 | 44,080 |
| Nordic Cities Map Quiz | 0 | - | 4.74 | 89,955 |
| The Vikings! | 0 | - | 4.46 | 28,282 |
| Sweden Immigration by Country | 0 | - | 4.55 | 55,807 |
| Portugal Country Quiz | 0 | - | 4.69 | 71,561 |
| The Portuguese Empire | 0 | - | 4.58 | 12,026 |
| Spain Country Quiz | 0 | - | 4.45 | 128,007 |
| Regions of Spain Quiz | 0 | - | 4.90 | 113,115 |
| Switzerland Country Quiz | 0 | - | 4.51 | 63,112 |
| Cantons of Switzerland | 0 | - | 4.98 | 50,691 |
| Countries and Territories of the United Kingdom | 0 | - | 4.89 | 93,304 |
| United Kingdom A-Z | 0 | - | 4.53 | 87,411 |
| Largest Islands in the British Isles With a Map | 0 | - | 4.52 | 38,624 |
| Wives of King Henry VIII | 0 | - | 4.55 | 53,257 |
| Countries the UK Declared War On | 0 | - | 4.61 | 122,072 |
| Geography of the British Empire | 0 | - | 4.48 | 39,571 |
| Animals in British History | 0 | - | 4.44 | 25,928 |
| 10 Closest Megacities to London | 0 | - | 4.90 | 17,611 |
| Counties of Wales | 0 | - | 4.63 | 39,056 |
| Countries of the Mongol Empire on a Map | 0 | - | 4.99 | 106,276 |
| U.S. Presidents Quiz | 0 | - | 5.00 | 3,672,434 |
| Deadliest U.S. Wars | 0 | - | 4.89 | 189,710 |
| Top 10 Coldest European Countries | 0 | - | 4.94 | 192,592 |
| Top 10 Hottest European Countries | 0 | - | 4.89 | 126,449 |
| Countries That Touch the Adriatic Sea | 0 | - | 4.96 | 70,918 |
| Top 10 European Countries by Coastline | 0 | - | 4.87 | 138,070 |
| 100 Longest Rivers in Europe - with a Map | 0 | - | 4.94 | 65,096 |
| Category Elimination - European Geography #1 | 0 | - | 4.98 | 231,645 |
| European Map without 10 Random Countries | 0 | - | 4.97 | 275,639 |
| Category Elimination - European Geography #2 | 0 | - | 4.99 | 165,992 |
| Category Elimination - European Countries #1 | 0 | - | 4.89 | 89,426 |
| Name a Valid European Country #1 | 0 | - | 4.99 | 258,495 |
| Name a Valid European Country #2 | 0 | - | 4.94 | 113,833 |
| Countries that Border Poland | 0 | - | 4.99 | 171,745 |
| Russia Country Quiz | 0 | - | 4.85 | 114,007 |
| Non-Bordering Countries Closest to Russia | 0 | - | 4.91 | 82,547 |
| Countries With the Most Russian Speakers | 0 | - | 4.97 | 99,442 |
| Croatia Country Quiz | 0 | - | 4.83 | 43,063 |
| Countries that Border Hungary | 0 | - | 4.98 | 103,915 |
| Bosnia and Herzegovina Country Quiz | 0 | - | 4.86 | 35,179 |
| Countries Bordering Serbia | 0 | - | 4.96 | 92,039 |
| Famous Germans by Picture | 0 | - | 4.12 | 16,786 |
| German History A-Z | 0 | - | 4.49 | 24,506 |
| History of Ireland | 0 | - | 4.39 | 30,988 |
| Italian History A-Z | 0 | - | 4.21 | 17,620 |
| Byzantine History | 0 | - | 4.91 | 28,691 |
| History of The Netherlands | 0 | - | 4.46 | 17,352 |
| Denmark Country Quiz | 0 | - | 4.78 | 75,622 |
| Finland Country Quiz | 0 | - | 4.50 | 59,338 |
| Norway Country Quiz | 0 | - | 4.44 | 76,942 |
| Iceland Country Quiz | 0 | - | 4.69 | 42,972 |
| Biggest Spanish Empire Countries | 0 | - | 4.91 | 115,388 |
