| The Trojan War | 0 | - | 4.83 | 39,393 |
| Greek Mythology General Knowledge #1 | 0 | - | 4.85 | 110,334 |
| Letters of the Greek Alphabet | 0 | - | 4.97 | 641,142 |
| Name that Greek Letter | 0 | - | 4.94 | 321,427 |
| Ancient Greek Trivia | 0 | - | 4.62 | 66,739 |
| Geography of Ancient Greece | 0 | - | 4.69 | 31,746 |
| Ancient Roman Trivia #1 | 0 | - | 4.85 | 83,959 |
| Roman Emperors | 0 | - | 4.95 | 118,281 |
| Greek Mythology General Knowledge #2 | 0 | - | 4.59 | 72,790 |
| Ancient Greece - Multiple Choice | 0 | - | 4.54 | 41,403 |
| 101 Figures from Greek Mythology | 0 | - | 4.99 | 124,040 |
| Name the English Monarchs | 0 | - | 4.92 | 497,345 |
| The Life of Alexander the Great | 0 | - | 4.49 | 18,406 |
| Ancient Roman Trivia #2 | 0 | - | 4.57 | 38,496 |
| Geography of the Roman Empire | 0 | - | 4.56 | 51,636 |
| Roman Names for Places | 0 | - | 4.62 | 57,816 |
| Ancient Greek Inventions | 0 | - | 4.17 | 16,285 |
| Olympian Gods Quiz | 0 | - | 4.96 | 494,634 |
| Medieval English History | 0 | - | 4.53 | 43,290 |
| Countries of Europe in 1815 With a Map | 0 | - | 4.99 | 148,756 |
| Countries of Europe in 1848 | 0 | - | 4.98 | 75,289 |
| Countries of Europe in 1870 with a Map | 0 | - | 4.95 | 63,231 |
| Every Country of Europe Since 1815 With a Map | 0 | - | 4.98 | 69,982 |
| Countries of Europe in 1360 with a Map | 0 | - | 4.99 | 55,899 |
| Countries Bordering France | 0 | - | 4.85 | 396,093 |
| Countries Bordering Germany | 0 | - | 4.99 | 366,669 |
| States of the German Confederation in 1848 | 0 | - | 4.89 | 31,481 |
| Ancient Greek Words | 0 | - | 4.92 | 110,535 |
| Seven Hills of Rome | 0 | - | 4.70 | 9,108 |
| Houses of British Monarchs | 0 | - | 4.53 | 65,251 |
| British History Multiple Choice #1 | 0 | - | 4.46 | 54,931 |
| British History Multiple Choice #2 | 0 | - | 4.42 | 37,814 |
| Europe Map Quiz | 0 | - | 5.00 | 4,727,173 |
| France Cities Map Quiz | 0 | - | 4.96 | 165,049 |
| Departments of France | 0 | - | 4.93 | 52,646 |
| Germany Country Quiz | 0 | - | 4.82 | 156,397 |
| Germany Cities Map Quiz | 0 | - | 4.87 | 125,055 |
| Italy Country Quiz | 0 | - | 4.82 | 122,070 |
| Regions of Italy Map Quiz | 0 | - | 4.96 | 148,251 |
| Italy Cities Map Quiz | 0 | - | 4.97 | 150,980 |
| Countries Surrounding Rome | 0 | - | 4.97 | 49,341 |
| Spain Cities Map Quiz | 0 | - | 4.87 | 95,868 |
| Regions of Spain Map Quiz | 0 | - | 4.95 | 184,500 |
| Modern-Day Countries of the British Empire in 1921 | 0 | - | 4.99 | 116,100 |
| England or Wales? | 0 | - | 4.94 | 45,278 |
| Biggest Countries in Europe in 1700 | 0 | - | 4.73 | 58,095 |
| French Geography Quiz #1 | 0 | - | 4.89 | 34,484 |
| Countries Bordering Austria | 0 | - | 4.97 | 117,642 |
| Countries that Visit France the Most | 0 | - | 4.85 | 45,458 |
| Countries Closest to Metropolitan France | 0 | - | 4.89 | 71,753 |
| Countries With the Most German Speakers | 0 | - | 4.89 | 94,026 |
| Greece Country Quiz | 0 | - | 4.74 | 65,702 |
| Ancient Greece A-Z | 0 | - | 4.60 | 22,966 |
| Counties of Ireland | 0 | - | 4.92 | 192,791 |
| Countries Bordering Italy | 0 | - | 4.94 | 100,360 |
| Countries Closest to Italy | 0 | - | 4.97 | 196,159 |
| Countries Closest to Spain | 0 | - | 4.96 | 225,122 |
| Counties of the UK and Ireland | 0 | - | 4.98 | 128,415 |
| Embarrassing Chapters in British History | 0 | - | 4.29 | 32,102 |
| History of Scotland | 0 | - | 4.51 | 20,990 |
| World Capitals Closest to London | 0 | - | 4.87 | 109,592 |
| 50 Busiest Air Routes from London | 0 | - | 4.86 | 95,695 |
| Europe by Borders in 30 Seconds | 0 | - | 4.98 | 424,824 |
| Andorra Country Quiz | 0 | - | 4.90 | 31,352 |
| Kings of France Quiz | 0 | - | 4.20 | 32,535 |
| The Reign of Napoleon | 0 | - | 4.54 | 38,640 |
| Countries that Beat Germany | 0 | - | 4.95 | 105,247 |
| Figures from Greek Mythology | 0 | - | 4.91 | 184,666 |
| Countries Italy Declared War On | 0 | - | 4.75 | 42,906 |
| Countries that Beat Italy | 0 | - | 4.85 | 53,799 |
| Countries that Beat Portugal | 0 | - | 4.86 | 58,587 |
| Countries that Beat Spain | 0 | - | 4.94 | 62,398 |
| Commonwealth of Nations Countries | 0 | - | 4.94 | 236,069 |
| English Royal Consorts | 0 | - | 4.37 | 37,139 |
| The Reign of Queen Elizabeth I | 0 | - | 4.53 | 31,581 |
| Countries That Use the Euro | 0 | - | 4.96 | 102,719 |
| Europe Cities Map Quiz | 0 | - | 4.99 | 362,054 |
| 10 Easternmost Countries in Europe | 0 | - | 4.89 | 113,327 |
| The Only European Country ... | 0 | - | 4.91 | 213,475 |
| European Countries NOT in NATO | 0 | - | 4.87 | 59,310 |
| Flags of Europe Quiz | 0 | - | 4.99 | 1,223,996 |
| Countries of Europe - One Minute Sprint | 0 | - | 4.94 | 1,318,556 |
| History of Russia Quiz | 0 | - | 4.49 | 31,771 |
| French History Multiple Choice | 0 | - | 4.55 | 32,853 |
| Countries that Beat Greece | 0 | - | 4.52 | 48,535 |
| History of Italy | 0 | - | 4.55 | 31,799 |
| Geography of the Dutch Empire | 0 | - | 4.62 | 34,460 |
| Countries of the Spanish Empire | 0 | - | 4.52 | 76,960 |
| Counties of England | 0 | - | 4.97 | 788,287 |
| Invasions of Great Britain | 0 | - | 4.51 | 59,355 |
| Oldest Cities in the United Kingdom | 0 | - | 4.39 | 23,597 |
| History of London | 0 | - | 4.33 | 26,092 |
| British History Quiz for Dummies | 0 | - | 4.70 | 78,038 |
| "Big Five" European Soccer Champions Since 2000 | 0 | - | 4.97 | 349,101 |
| 10 Biggest European Countries by Area | 0 | - | 4.99 | 191,577 |
| 10 Westernmost Countries in Europe | 0 | - | 4.96 | 150,188 |
| Top 10 Languages Spoken in Europe | 0 | - | 4.96 | 216,020 |
| European Landmarks Map Quiz | 0 | - | 4.97 | 86,399 |
| Countries of Europe with an Empty Map | 0 | - | 5.00 | 307,560 |
| All First-Level Subdivisions of Europe on a Map | 0 | - | 4.98 | 167,518 |
| Countries with Territory in the Balkans | 0 | - | 4.96 | 88,134 |
| Eastern Europe Map Quiz | 0 | - | 4.91 | 127,056 |
| Slavic Countries | 0 | - | 4.96 | 110,767 |
| Famous Ancient Romans | 0 | - | 4.69 | 84,984 |
| Roman Numeral Decoding Quiz | 0 | - | 4.94 | 433,085 |
| Two Letter Roman Numerals | 0 | - | 4.97 | 55,545 |
| UK Cities Map Quiz | 0 | - | 4.95 | 461,871 |
| The Reign of Henry VIII | 0 | - | 4.25 | 27,593 |
| Elizabeth I... or Elizabeth II? | 0 | - | 4.30 | 24,422 |
| Champions League Winners | 0 | - | 4.92 | 995,006 |
| European Geography By Letter - P #1 | 0 | - | 4.81 | 96,263 |
| European Diaspora - Top 11 Countries | 0 | - | 4.90 | 94,955 |
| 10 European Countries with the Most Tourists | 0 | - | 4.98 | 136,205 |
| Three Band Flags of Europe | 0 | - | 4.98 | 191,634 |
| Pixelated Europe Map | 0 | - | 4.88 | 121,636 |
| Monarchies of Europe | 0 | - | 4.90 | 97,202 |
| European Countries with One Border | 0 | - | 4.97 | 181,446 |
| European Countries with the Fewest Borders | 0 | - | 4.97 | 177,966 |
| European Geography By Letter - B #2 | 0 | - | 4.83 | 76,116 |
| Federal Subjects of Russia | 0 | - | 4.94 | 143,577 |
| Countries That Border Russia | 0 | - | 4.98 | 458,519 |
| Countries Formerly in Yugoslavia | 0 | - | 4.95 | 124,096 |
| History of Austria | 0 | - | 4.70 | 17,734 |
| Austria Country Quiz | 0 | - | 4.57 | 59,277 |
| Belgium Country Quiz | 0 | - | 4.70 | 71,158 |
| France Country Quiz | 0 | - | 4.70 | 133,724 |
| Regions of France Map Quiz | 0 | - | 4.97 | 142,996 |
| Geography of the French Empire | 0 | - | 4.48 | 26,911 |
| The French Revolution | 0 | - | 4.46 | 23,746 |
| History of France | 0 | - | 4.59 | 55,872 |
| French History A-Z | 0 | - | 4.17 | 18,584 |
| States of Germany Map Quiz | 0 | - | 4.91 | 131,557 |
| States of Germany | 0 | - | 4.96 | 149,766 |
| Biggest Cities in Germany in 1910 | 0 | - | 4.41 | 23,370 |
| Germany Immigration by Country | 0 | - | 4.84 | 79,902 |
| Regions of Italy | 0 | - | 4.92 | 74,596 |
| Luxembourg Country Quiz | 0 | - | 4.77 | 33,447 |
| Monaco Country Quiz | 0 | - | 4.47 | 41,194 |
| Netherlands Country Quiz | 0 | - | 4.50 | 79,896 |
| Netherlands Immigration by Country | 0 | - | 4.94 | 43,730 |
| Nordic Cities Map Quiz | 0 | - | 4.74 | 89,705 |
| The Vikings! | 0 | - | 4.45 | 28,234 |
| Sweden Immigration by Country | 0 | - | 4.55 | 55,654 |
| Portugal Country Quiz | 0 | - | 4.69 | 71,269 |
| The Portuguese Empire | 0 | - | 4.54 | 11,980 |
| Spain Country Quiz | 0 | - | 4.45 | 127,478 |
| Regions of Spain Quiz | 0 | - | 4.90 | 112,133 |
| Switzerland Country Quiz | 0 | - | 4.51 | 62,878 |
| Cantons of Switzerland | 0 | - | 4.98 | 50,051 |
| Countries and Territories of the United Kingdom | 0 | - | 4.89 | 92,834 |
| United Kingdom A-Z | 0 | - | 4.53 | 87,159 |
| Largest Islands in the British Isles With a Map | 0 | - | 4.52 | 38,546 |
| Wives of King Henry VIII | 0 | - | 4.55 | 53,153 |
| Countries the UK Declared War On | 0 | - | 4.61 | 121,695 |
| Geography of the British Empire | 0 | - | 4.48 | 39,455 |
| 10 Closest Megacities to London | 0 | - | 4.90 | 17,392 |
| Counties of Wales | 0 | - | 4.63 | 38,832 |
| Countries of the Mongol Empire on a Map | 0 | - | 4.99 | 105,706 |
| U.S. Presidents Quiz | 0 | - | 5.00 | 3,648,391 |
| Deadliest U.S. Wars | 0 | - | 4.89 | 189,117 |
| Top 10 Coldest European Countries | 0 | - | 4.94 | 192,162 |
| Top 10 Hottest European Countries | 0 | - | 4.89 | 126,022 |
| Countries That Touch the Adriatic Sea | 0 | - | 4.96 | 70,754 |
| Top 10 European Countries by Coastline | 0 | - | 4.89 | 137,775 |
| 100 Longest Rivers in Europe - with a Map | 0 | - | 4.94 | 64,741 |
| Category Elimination - European Geography #1 | 0 | - | 4.98 | 230,208 |
| European Map without 10 Random Countries | 0 | - | 4.97 | 273,967 |
| Category Elimination - European Geography #2 | 0 | - | 4.99 | 164,900 |
| Category Elimination - European Countries #1 | 0 | - | 4.89 | 88,845 |
| Name a Valid European Country #1 | 0 | - | 4.99 | 256,255 |
| Name a Valid European Country #2 | 0 | - | 4.94 | 113,018 |
| Countries that Border Poland | 0 | - | 4.99 | 171,203 |
| Russia Country Quiz | 0 | - | 4.85 | 113,554 |
| Non-Bordering Countries Closest to Russia | 0 | - | 4.91 | 82,332 |
| Countries With the Most Russian Speakers | 0 | - | 4.97 | 98,139 |
| Croatia Country Quiz | 0 | - | 4.83 | 42,788 |
| Countries that Border Hungary | 0 | - | 4.98 | 103,599 |
| Bosnia and Herzegovina Country Quiz | 0 | - | 4.86 | 34,995 |
| Countries Bordering Serbia | 0 | - | 4.96 | 91,643 |
| Most Popular Baby Girls Names in Germany | 0 | - | 4.51 | 38,609 |
| German Inventions | 0 | - | 3.91 | 30,177 |
| Embarrassing Chapters in German History | 0 | - | 3.41 | 12,561 |
| Roman to Greek God | 0 | - | 4.52 | 122,126 |
| History of Ireland | 0 | - | 4.39 | 30,784 |
| Italian History A-Z | 0 | - | 4.21 | 17,341 |
| The Life of Julius Caesar | 0 | - | 4.39 | 38,933 |
| Roman History by Picture | 0 | - | 4.46 | 26,326 |
| Byzantine History | 0 | - | 4.91 | 28,582 |
| History of The Netherlands | 0 | - | 4.46 | 17,297 |
| Denmark Country Quiz | 0 | - | 4.78 | 75,366 |
| Finland Country Quiz | 0 | - | 4.50 | 59,041 |
| Norway Country Quiz | 0 | - | 4.44 | 76,537 |
| Iceland Country Quiz | 0 | - | 4.69 | 42,826 |
| Biggest Spanish Empire Countries | 0 | - | 4.91 | 114,665 |
| Spanish History A-Z | 0 | - | 4.36 | 18,996 |
| Countries Bordering Spain | 0 | - | 4.51 | 69,014 |
| UK Immigration by Country | 0 | - | 4.94 | 139,487 |
| Arthurian Legend | 0 | - | 4.33 | 25,045 |
| United Kingdom Country Quiz | 0 | - | 4.96 | 137,966 |
| British Monopoly Board | 0 | - | 4.52 | 41,017 |
