| The Trojan War | 0 | - | 4.83 | 39,390 |
| Greek Mythology General Knowledge #1 | 0 | - | 4.85 | 110,320 |
| Letters of the Greek Alphabet | 0 | - | 4.97 | 641,100 |
| Name that Greek Letter | 0 | - | 4.94 | 321,404 |
| Ancient Greek Trivia | 0 | - | 4.62 | 66,736 |
| Geography of Ancient Greece | 0 | - | 4.69 | 31,745 |
| Ancient Roman Trivia #1 | 0 | - | 4.85 | 83,953 |
| Roman Emperors | 0 | - | 4.95 | 118,268 |
| Greek Mythology General Knowledge #2 | 0 | - | 4.59 | 72,784 |
| Ancient Greece - Multiple Choice | 0 | - | 4.54 | 41,401 |
| 101 Figures from Greek Mythology | 0 | - | 4.99 | 124,022 |
| Name the English Monarchs | 0 | - | 4.92 | 497,305 |
| The Life of Alexander the Great | 0 | - | 4.49 | 18,405 |
| Ancient Roman Trivia #2 | 0 | - | 4.57 | 38,493 |
| Geography of the Roman Empire | 0 | - | 4.56 | 51,635 |
| Roman Names for Places | 0 | - | 4.62 | 57,813 |
| Ancient Greek Inventions | 0 | - | 4.17 | 16,285 |
| Olympian Gods Quiz | 0 | - | 4.96 | 494,498 |
| Medieval English History | 0 | - | 4.53 | 43,289 |
| Countries of Europe in 1815 With a Map | 0 | - | 4.99 | 148,746 |
| Countries of Europe in 1848 | 0 | - | 4.98 | 75,280 |
| Countries of Europe in 1870 with a Map | 0 | - | 4.95 | 63,222 |
| Every Country of Europe Since 1815 With a Map | 0 | - | 4.98 | 69,973 |
| Countries of Europe in 1360 with a Map | 0 | - | 4.99 | 55,892 |
| Countries Bordering France | 0 | - | 4.85 | 395,517 |
| Countries Bordering Germany | 0 | - | 4.99 | 366,623 |
| States of the German Confederation in 1848 | 0 | - | 4.89 | 31,480 |
| Ancient Greek Words | 0 | - | 4.92 | 110,530 |
| Seven Hills of Rome | 0 | - | 4.70 | 9,108 |
| Houses of British Monarchs | 0 | - | 4.53 | 65,249 |
| British History Multiple Choice #1 | 0 | - | 4.46 | 54,929 |
| British History Multiple Choice #2 | 0 | - | 4.42 | 37,811 |
| Europe Map Quiz | 0 | - | 5.00 | 4,726,875 |
| France Cities Map Quiz | 0 | - | 4.96 | 165,037 |
| Departments of France | 0 | - | 4.93 | 52,629 |
| Germany Country Quiz | 0 | - | 4.82 | 156,383 |
| Germany Cities Map Quiz | 0 | - | 4.87 | 125,043 |
| Italy Country Quiz | 0 | - | 4.82 | 122,061 |
| Regions of Italy Map Quiz | 0 | - | 4.96 | 148,241 |
| Italy Cities Map Quiz | 0 | - | 4.97 | 150,969 |
| Countries Surrounding Rome | 0 | - | 4.97 | 49,340 |
| Spain Cities Map Quiz | 0 | - | 4.87 | 95,863 |
| Regions of Spain Map Quiz | 0 | - | 4.95 | 184,487 |
| Modern-Day Countries of the British Empire in 1921 | 0 | - | 4.99 | 116,087 |
| England or Wales? | 0 | - | 4.94 | 45,275 |
| Biggest Countries in Europe in 1700 | 0 | - | 4.73 | 58,088 |
| French Geography Quiz #1 | 0 | - | 4.89 | 34,481 |
| Countries Bordering Austria | 0 | - | 4.97 | 117,629 |
| Countries that Visit France the Most | 0 | - | 4.85 | 45,453 |
| Countries Closest to Metropolitan France | 0 | - | 4.89 | 71,750 |
| Countries With the Most German Speakers | 0 | - | 4.89 | 94,002 |
| Greece Country Quiz | 0 | - | 4.74 | 65,696 |
| Ancient Greece A-Z | 0 | - | 4.60 | 22,960 |
| Counties of Ireland | 0 | - | 4.92 | 192,762 |
| Countries Bordering Italy | 0 | - | 4.94 | 100,352 |
| Countries Closest to Italy | 0 | - | 4.97 | 196,150 |
| Countries Closest to Spain | 0 | - | 4.96 | 225,108 |
| Counties of the UK and Ireland | 0 | - | 4.98 | 128,397 |
| 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 | 109,572 |
| 50 Busiest Air Routes from London | 0 | - | 4.86 | 95,688 |
| Europe by Borders in 30 Seconds | 0 | - | 4.98 | 424,789 |
| Andorra Country Quiz | 0 | - | 4.90 | 31,350 |
| Kings of France Quiz | 0 | - | 4.20 | 32,534 |
| The Reign of Napoleon | 0 | - | 4.54 | 38,634 |
| Countries that Beat Germany | 0 | - | 4.95 | 105,231 |
| Figures from Greek Mythology | 0 | - | 4.91 | 184,644 |
| Countries Italy Declared War On | 0 | - | 4.75 | 42,905 |
| Countries that Beat Italy | 0 | - | 4.85 | 53,786 |
| Countries that Beat Portugal | 0 | - | 4.86 | 58,582 |
| Countries that Beat Spain | 0 | - | 4.94 | 62,390 |
| Commonwealth of Nations Countries | 0 | - | 4.94 | 236,053 |
| English Royal Consorts | 0 | - | 4.37 | 37,138 |
| The Reign of Queen Elizabeth I | 0 | - | 4.53 | 31,580 |
| Countries That Use the Euro | 0 | - | 4.96 | 102,698 |
| Europe Cities Map Quiz | 0 | - | 4.99 | 362,039 |
| 10 Easternmost Countries in Europe | 0 | - | 4.89 | 113,316 |
| The Only European Country ... | 0 | - | 4.91 | 213,447 |
| European Countries NOT in NATO | 0 | - | 4.87 | 59,299 |
| Flags of Europe Quiz | 0 | - | 4.99 | 1,223,818 |
| Countries of Europe - One Minute Sprint | 0 | - | 4.94 | 1,318,486 |
| History of Russia Quiz | 0 | - | 4.49 | 31,770 |
| French History Multiple Choice | 0 | - | 4.55 | 32,850 |
| Countries that Beat Greece | 0 | - | 4.52 | 48,533 |
| History of Italy | 0 | - | 4.55 | 31,796 |
| Geography of the Dutch Empire | 0 | - | 4.62 | 34,458 |
| Countries of the Spanish Empire | 0 | - | 4.52 | 76,957 |
| Counties of England | 0 | - | 4.97 | 788,209 |
| Invasions of Great Britain | 0 | - | 4.51 | 59,353 |
| 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 | 78,034 |
| "Big Five" European Soccer Champions Since 2000 | 0 | - | 4.97 | 349,030 |
| 10 Biggest European Countries by Area | 0 | - | 4.99 | 191,570 |
| 10 Westernmost Countries in Europe | 0 | - | 4.96 | 150,180 |
| Top 10 Languages Spoken in Europe | 0 | - | 4.96 | 216,009 |
| European Landmarks Map Quiz | 0 | - | 4.97 | 86,389 |
| Countries of Europe with an Empty Map | 0 | - | 5.00 | 307,528 |
| All First-Level Subdivisions of Europe on a Map | 0 | - | 4.98 | 167,484 |
| Countries with Territory in the Balkans | 0 | - | 4.96 | 88,125 |
| Eastern Europe Map Quiz | 0 | - | 4.91 | 127,055 |
| Slavic Countries | 0 | - | 4.96 | 110,762 |
| Famous Ancient Romans | 0 | - | 4.69 | 84,979 |
| Roman Numeral Decoding Quiz | 0 | - | 4.94 | 433,055 |
| Two Letter Roman Numerals | 0 | - | 4.97 | 55,539 |
| UK Cities Map Quiz | 0 | - | 4.95 | 461,849 |
| 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 | 994,906 |
| European Geography By Letter - P #1 | 0 | - | 4.81 | 96,257 |
| European Diaspora - Top 11 Countries | 0 | - | 4.90 | 94,951 |
| 10 European Countries with the Most Tourists | 0 | - | 4.98 | 136,193 |
| Three Band Flags of Europe | 0 | - | 4.98 | 191,615 |
| Pixelated Europe Map | 0 | - | 4.88 | 121,624 |
| Monarchies of Europe | 0 | - | 4.90 | 97,192 |
| European Countries with One Border | 0 | - | 4.97 | 181,439 |
| European Countries with the Fewest Borders | 0 | - | 4.97 | 177,957 |
| European Geography By Letter - B #2 | 0 | - | 4.83 | 76,104 |
| Federal Subjects of Russia | 0 | - | 4.94 | 143,546 |
| Countries That Border Russia | 0 | - | 4.98 | 458,496 |
| Countries Formerly in Yugoslavia | 0 | - | 4.95 | 124,091 |
| History of Austria | 0 | - | 4.70 | 17,734 |
| Austria Country Quiz | 0 | - | 4.57 | 59,268 |
| Belgium Country Quiz | 0 | - | 4.70 | 71,150 |
| France Country Quiz | 0 | - | 4.70 | 133,715 |
| Regions of France Map Quiz | 0 | - | 4.97 | 142,977 |
| Geography of the French Empire | 0 | - | 4.48 | 26,910 |
| The French Revolution | 0 | - | 4.46 | 23,745 |
| History of France | 0 | - | 4.59 | 55,863 |
| French History A-Z | 0 | - | 4.17 | 18,580 |
| States of Germany Map Quiz | 0 | - | 4.91 | 131,545 |
| States of Germany | 0 | - | 4.96 | 149,740 |
| Biggest Cities in Germany in 1910 | 0 | - | 4.41 | 23,368 |
| Germany Immigration by Country | 0 | - | 4.84 | 79,895 |
| Regions of Italy | 0 | - | 4.92 | 74,584 |
| Luxembourg Country Quiz | 0 | - | 4.77 | 33,442 |
| Monaco Country Quiz | 0 | - | 4.47 | 41,187 |
| Netherlands Country Quiz | 0 | - | 4.50 | 79,892 |
| Netherlands Immigration by Country | 0 | - | 4.94 | 43,723 |
| Nordic Cities Map Quiz | 0 | - | 4.74 | 89,699 |
| The Vikings! | 0 | - | 4.45 | 28,234 |
| Sweden Immigration by Country | 0 | - | 4.55 | 55,647 |
| Portugal Country Quiz | 0 | - | 4.69 | 71,262 |
| The Portuguese Empire | 0 | - | 4.54 | 11,979 |
| Spain Country Quiz | 0 | - | 4.45 | 127,469 |
| Regions of Spain Quiz | 0 | - | 4.90 | 112,116 |
| Switzerland Country Quiz | 0 | - | 4.51 | 62,872 |
| Cantons of Switzerland | 0 | - | 4.98 | 50,046 |
| Countries and Territories of the United Kingdom | 0 | - | 4.89 | 92,826 |
| United Kingdom A-Z | 0 | - | 4.53 | 87,155 |
| Largest Islands in the British Isles With a Map | 0 | - | 4.52 | 38,543 |
| Wives of King Henry VIII | 0 | - | 4.55 | 53,152 |
| Countries the UK Declared War On | 0 | - | 4.61 | 121,686 |
| Geography of the British Empire | 0 | - | 4.48 | 39,453 |
| 10 Closest Megacities to London | 0 | - | 4.90 | 17,392 |
| Counties of Wales | 0 | - | 4.63 | 38,825 |
| Countries of the Mongol Empire on a Map | 0 | - | 4.99 | 105,692 |
| U.S. Presidents Quiz | 0 | - | 5.00 | 3,648,089 |
| Deadliest U.S. Wars | 0 | - | 4.89 | 189,108 |
| Top 10 Coldest European Countries | 0 | - | 4.94 | 192,158 |
| Top 10 Hottest European Countries | 0 | - | 4.89 | 126,011 |
| Countries That Touch the Adriatic Sea | 0 | - | 4.96 | 70,752 |
| Top 10 European Countries by Coastline | 0 | - | 4.89 | 137,772 |
| 100 Longest Rivers in Europe - with a Map | 0 | - | 4.94 | 64,733 |
| Category Elimination - European Geography #1 | 0 | - | 4.98 | 230,181 |
| European Map without 10 Random Countries | 0 | - | 4.97 | 273,943 |
| Category Elimination - European Geography #2 | 0 | - | 4.99 | 164,876 |
| Category Elimination - European Countries #1 | 0 | - | 4.89 | 88,832 |
| Name a Valid European Country #1 | 0 | - | 4.99 | 256,210 |
| Name a Valid European Country #2 | 0 | - | 4.94 | 112,993 |
| Countries that Border Poland | 0 | - | 4.99 | 171,181 |
| Russia Country Quiz | 0 | - | 4.85 | 113,546 |
| Non-Bordering Countries Closest to Russia | 0 | - | 4.91 | 82,328 |
| Countries With the Most Russian Speakers | 0 | - | 4.97 | 98,111 |
| Croatia Country Quiz | 0 | - | 4.83 | 42,781 |
| Countries that Border Hungary | 0 | - | 4.98 | 103,596 |
| Bosnia and Herzegovina Country Quiz | 0 | - | 4.86 | 34,990 |
| Countries Bordering Serbia | 0 | - | 4.96 | 91,638 |
| Most Popular Baby Girls Names in Germany | 0 | - | 4.51 | 38,604 |
| German Inventions | 0 | - | 3.91 | 30,176 |
| Embarrassing Chapters in German History | 0 | - | 3.41 | 12,558 |
| Roman to Greek God | 0 | - | 4.52 | 122,120 |
| History of Ireland | 0 | - | 4.39 | 30,782 |
| Italian History A-Z | 0 | - | 4.21 | 17,337 |
| The Life of Julius Caesar | 0 | - | 4.39 | 38,931 |
| Roman History by Picture | 0 | - | 4.46 | 26,326 |
| Byzantine History | 0 | - | 4.91 | 28,578 |
| History of The Netherlands | 0 | - | 4.46 | 17,296 |
| Denmark Country Quiz | 0 | - | 4.78 | 75,361 |
| Finland Country Quiz | 0 | - | 4.50 | 59,031 |
| Norway Country Quiz | 0 | - | 4.44 | 76,525 |
| Iceland Country Quiz | 0 | - | 4.69 | 42,819 |
| Biggest Spanish Empire Countries | 0 | - | 4.91 | 114,655 |
| Spanish History A-Z | 0 | - | 4.36 | 18,994 |
| Countries Bordering Spain | 0 | - | 4.51 | 69,009 |
| UK Immigration by Country | 0 | - | 4.94 | 139,478 |
| Arthurian Legend | 0 | - | 4.33 | 25,044 |
| United Kingdom Country Quiz | 0 | - | 4.96 | 137,945 |
| British Monopoly Board | 0 | - | 4.52 | 41,015 |
