| The Trojan War | 0 | - | 4.83 | 39,727 |
| Greek Mythology General Knowledge #1 | 0 | - | 4.85 | 111,842 |
| Letters of the Greek Alphabet | 0 | - | 4.97 | 647,423 |
| Name that Greek Letter | 0 | - | 4.93 | 323,447 |
| Ancient Greek Trivia | 0 | - | 4.62 | 66,995 |
| Ancient Roman Trivia #1 | 0 | - | 4.85 | 84,533 |
| Roman Emperors | 0 | - | 4.95 | 120,043 |
| Greek Mythology General Knowledge #2 | 0 | - | 4.59 | 73,662 |
| Ancient Greece - Multiple Choice | 0 | - | 4.54 | 41,658 |
| 101 Figures from Greek Mythology | 0 | - | 4.99 | 125,978 |
| Name the English Monarchs | 0 | - | 4.91 | 502,642 |
| The Life of Alexander the Great | 0 | - | 4.51 | 18,501 |
| Ancient Roman Trivia #2 | 0 | - | 4.57 | 38,747 |
| Geography of the Roman Empire | 0 | - | 4.56 | 51,929 |
| Roman Names for Places | 0 | - | 4.62 | 58,285 |
| Ancient Greek Inventions | 0 | - | 4.18 | 16,346 |
| States of the German Confederation in 1848 | 0 | - | 4.89 | 32,008 |
| Olympian Gods Quiz | 0 | - | 4.96 | 500,823 |
| Medieval English History | 0 | - | 4.53 | 43,507 |
| Countries of Europe in 1815 With a Map | 0 | - | 4.99 | 150,279 |
| Countries of Europe in 1848 | 0 | - | 4.99 | 81,804 |
| Countries of Europe in 1870 with a Map | 0 | - | 4.95 | 64,673 |
| Every Country of Europe Since 1815 With a Map | 0 | - | 4.98 | 71,006 |
| Countries of Europe in 1360 with a Map | 0 | - | 4.99 | 56,883 |
| Countries Bordering France | 0 | - | 4.83 | 402,537 |
| Countries Bordering Germany | 0 | - | 4.99 | 369,404 |
| Ancient Greek Words | 0 | - | 4.93 | 111,598 |
| Seven Hills of Rome | 0 | - | 4.70 | 9,183 |
| The Reign of Queen Elizabeth I | 0 | - | 4.53 | 31,792 |
| Houses of British Monarchs | 0 | - | 4.53 | 65,665 |
| British History Multiple Choice #1 | 0 | - | 4.46 | 55,144 |
| British History Multiple Choice #2 | 0 | - | 4.42 | 37,959 |
| Europe Map Quiz | 0 | - | 5.00 | 4,762,935 |
| Andorra Country Quiz | 0 | - | 4.90 | 31,684 |
| France Cities Map Quiz | 0 | - | 4.96 | 166,748 |
| Departments of France | 0 | - | 4.93 | 54,105 |
| Germany Country Quiz | 0 | - | 4.83 | 157,846 |
| Germany Cities Map Quiz | 0 | - | 4.87 | 126,333 |
| Italy Country Quiz | 0 | - | 4.80 | 123,403 |
| Regions of Italy Map Quiz | 0 | - | 4.96 | 149,380 |
| Italy Cities Map Quiz | 0 | - | 4.97 | 152,046 |
| Countries Surrounding Rome | 0 | - | 4.97 | 49,546 |
| Spain Cities Map Quiz | 0 | - | 4.87 | 96,926 |
| Regions of Spain Map Quiz | 0 | - | 4.95 | 185,645 |
| Modern-Day Countries of the British Empire in 1921 | 0 | - | 4.99 | 117,610 |
| England or Wales? | 0 | - | 4.94 | 45,689 |
| Biggest Countries in Europe in 1700 | 0 | - | 4.73 | 58,491 |
| French Geography Quiz #1 | 0 | - | 4.89 | 34,769 |
| Countries Bordering Austria | 0 | - | 4.97 | 118,319 |
| Countries that Visit France the Most | 0 | - | 4.85 | 45,871 |
| Countries Closest to Metropolitan France | 0 | - | 4.89 | 72,179 |
| Countries With the Most German Speakers | 0 | - | 4.89 | 96,689 |
| Greece Country Quiz | 0 | - | 4.74 | 66,253 |
| Ancient Greece A-Z | 0 | - | 4.60 | 23,142 |
| Counties of Ireland | 0 | - | 4.92 | 195,269 |
| Countries Bordering Italy | 0 | - | 4.94 | 100,867 |
| Countries Closest to Italy | 0 | - | 4.97 | 198,045 |
| Countries Closest to Spain | 0 | - | 4.96 | 226,987 |
| Counties of the UK and Ireland | 0 | - | 4.98 | 130,723 |
| Embarrassing Chapters in British History | 0 | - | 4.29 | 32,262 |
| History of Scotland | 0 | - | 4.51 | 21,092 |
| World Capitals Closest to London | 0 | - | 4.88 | 110,655 |
| 50 Busiest Air Routes from London | 0 | - | 4.87 | 96,839 |
| Europe by Borders in 30 Seconds | 0 | - | 4.98 | 428,195 |
| Kings of France Quiz | 0 | - | 4.20 | 32,745 |
| The Reign of Napoleon | 0 | - | 4.54 | 38,956 |
| Countries that Beat Germany | 0 | - | 4.94 | 106,430 |
| Figures from Greek Mythology | 0 | - | 4.91 | 186,954 |
| Countries Italy Declared War On | 0 | - | 4.75 | 43,330 |
| Countries that Beat Italy | 0 | - | 4.85 | 54,488 |
| Countries that Beat Portugal | 0 | - | 4.86 | 59,343 |
| Countries that Beat Spain | 0 | - | 4.94 | 62,938 |
| Commonwealth of Nations Countries | 0 | - | 4.94 | 237,405 |
| English Royal Consorts | 0 | - | 4.38 | 37,351 |
| Countries That Use the Euro | 0 | - | 4.95 | 105,029 |
| Europe Cities Map Quiz | 0 | - | 4.99 | 364,457 |
| 10 Easternmost Countries in Europe | 0 | - | 4.89 | 115,246 |
| The Only European Country ... | 0 | - | 4.91 | 216,619 |
| European Countries NOT in NATO | 0 | - | 4.90 | 61,127 |
| Flags of Europe Quiz | 0 | - | 4.99 | 1,244,126 |
| Countries of Europe - One Minute Sprint | 0 | - | 4.94 | 1,328,692 |
| History of Russia Quiz | 0 | - | 4.47 | 31,917 |
| French History Multiple Choice | 0 | - | 4.55 | 33,039 |
| Countries that Beat Greece | 0 | - | 4.53 | 48,965 |
| History of Italy | 0 | - | 4.55 | 31,975 |
| Geography of the Dutch Empire | 0 | - | 4.62 | 34,661 |
| Countries of the Spanish Empire | 0 | - | 4.52 | 77,237 |
| Counties of England | 0 | - | 4.97 | 796,724 |
| Invasions of Great Britain | 0 | - | 4.51 | 59,865 |
| Oldest Cities in the United Kingdom | 0 | - | 4.39 | 23,716 |
| History of London | 0 | - | 4.33 | 26,191 |
| British History Quiz for Dummies | 0 | - | 4.70 | 78,603 |
| "Big Five" European Soccer Champions Since 2000 | 0 | - | 4.97 | 355,971 |
| 10 Biggest European Countries by Area | 0 | - | 4.99 | 192,664 |
| 10 Westernmost Countries in Europe | 0 | - | 4.96 | 151,205 |
| Top 10 Languages Spoken in Europe | 0 | - | 4.96 | 218,705 |
| European Landmarks Map Quiz | 0 | - | 4.97 | 87,151 |
| Countries of Europe with an Empty Map | 0 | - | 5.00 | 310,506 |
| All First-Level Subdivisions of Europe on a Map | 0 | - | 4.99 | 171,850 |
| Countries with Territory in the Balkans | 0 | - | 4.96 | 89,284 |
| Eastern Europe Map Quiz | 0 | - | 4.91 | 128,190 |
| Slavic Countries | 0 | - | 4.96 | 111,660 |
| States of the Holy Roman Empire in 1356 | 0 | - | 4.98 | 74,179 |
| Famous Ancient Romans | 0 | - | 4.70 | 85,476 |
| Roman Numeral Decoding Quiz | 0 | - | 4.94 | 437,107 |
| Two Letter Roman Numerals | 0 | - | 4.97 | 56,133 |
| UK Cities Map Quiz | 0 | - | 4.96 | 464,540 |
| The Reign of Henry VIII | 0 | - | 4.25 | 27,752 |
| Elizabeth I... or Elizabeth II? | 0 | - | 4.30 | 24,503 |
| Champions League Winners | 0 | - | 4.92 | 1,006,718 |
| European Diaspora - Top 11 Countries | 0 | - | 4.90 | 95,855 |
| 10 European Countries with the Most Tourists | 0 | - | 4.98 | 137,522 |
| Three Band Flags of Europe | 0 | - | 4.98 | 193,310 |
| Pixelated Europe Map | 0 | - | 4.88 | 122,761 |
| Monarchies of Europe | 0 | - | 4.90 | 98,148 |
| European Countries with One Border | 0 | - | 4.97 | 182,776 |
| European Countries with the Fewest Borders | 0 | - | 4.97 | 179,575 |
| European Geography By Letter - B #2 | 0 | - | 4.85 | 78,557 |
| Federal Subjects of Russia | 0 | - | 4.95 | 147,155 |
| Countries That Border Russia | 0 | - | 4.98 | 461,732 |
| Countries Formerly in Yugoslavia | 0 | - | 4.95 | 124,900 |
| History of Austria | 0 | - | 4.70 | 17,861 |
| Austria Country Quiz | 0 | - | 4.57 | 59,738 |
| Belgium Country Quiz | 0 | - | 4.73 | 71,794 |
| France Country Quiz | 0 | - | 4.70 | 134,976 |
| Regions of France Map Quiz | 0 | - | 4.97 | 144,438 |
| Geography of the French Empire | 0 | - | 4.45 | 27,060 |
| The French Revolution | 0 | - | 4.47 | 23,932 |
| History of France | 0 | - | 4.59 | 56,979 |
| French History A-Z | 0 | - | 4.27 | 24,637 |
| States of Germany Map Quiz | 0 | - | 4.91 | 132,818 |
| States of Germany | 0 | - | 4.96 | 152,575 |
| Germany Immigration by Country | 0 | - | 4.85 | 81,035 |
| Regions of Italy | 0 | - | 4.92 | 75,867 |
| Luxembourg Country Quiz | 0 | - | 4.78 | 33,748 |
| Monaco Country Quiz | 0 | - | 4.47 | 41,504 |
| Netherlands Country Quiz | 0 | - | 4.53 | 80,528 |
| Netherlands Immigration by Country | 0 | - | 4.93 | 52,160 |
| Nordic Cities Map Quiz | 0 | - | 4.77 | 90,460 |
| The Vikings! | 0 | - | 4.46 | 28,343 |
| Sweden Immigration by Country | 0 | - | 4.55 | 56,126 |
| Portugal Country Quiz | 0 | - | 4.69 | 71,901 |
| The Portuguese Empire | 0 | - | 4.58 | 12,064 |
| Spain Country Quiz | 0 | - | 4.44 | 128,529 |
| Regions of Spain Quiz | 0 | - | 4.90 | 113,939 |
| Switzerland Country Quiz | 0 | - | 4.51 | 63,368 |
| Cantons of Switzerland | 0 | - | 4.98 | 51,206 |
| Countries and Territories of the United Kingdom | 0 | - | 4.90 | 94,000 |
| United Kingdom A-Z | 0 | - | 4.52 | 88,034 |
| Largest Islands in the British Isles With a Map | 0 | - | 4.52 | 38,731 |
| Wives of King Henry VIII | 0 | - | 4.55 | 53,351 |
| Countries the UK Declared War On | 0 | - | 4.61 | 122,474 |
| Geography of the British Empire | 0 | - | 4.48 | 39,672 |
| Animals in British History | 0 | - | 4.43 | 26,006 |
| 10 Closest Megacities to London | 0 | - | 4.90 | 17,700 |
| Counties of Wales | 0 | - | 4.63 | 39,273 |
| Countries of the Mongol Empire on a Map | 0 | - | 4.99 | 106,862 |
| U.S. Presidents Quiz | 0 | - | 5.00 | 3,698,603 |
| Deadliest U.S. Wars | 0 | - | 4.89 | 190,796 |
| Top 10 Coldest European Countries | 0 | - | 4.94 | 193,116 |
| Top 10 Hottest European Countries | 0 | - | 4.88 | 127,010 |
| Countries That Touch the Adriatic Sea | 0 | - | 4.96 | 71,107 |
| Top 10 European Countries by Coastline | 0 | - | 4.87 | 138,383 |
| 100 Longest Rivers in Europe - with a Map | 0 | - | 4.94 | 65,449 |
| Category Elimination - European Geography #1 | 0 | - | 4.98 | 233,257 |
| European Map without 10 Random Countries | 0 | - | 4.97 | 276,822 |
| Category Elimination - European Geography #2 | 0 | - | 4.99 | 167,130 |
| Category Elimination - European Countries #1 | 0 | - | 4.89 | 90,056 |
| Name a Valid European Country #1 | 0 | - | 4.99 | 261,001 |
| Name a Valid European Country #2 | 0 | - | 4.94 | 114,712 |
| Countries that Border Poland | 0 | - | 4.99 | 172,279 |
| Russia Country Quiz | 0 | - | 4.85 | 114,486 |
| Non-Bordering Countries Closest to Russia | 0 | - | 4.91 | 82,848 |
| Countries With the Most Russian Speakers | 0 | - | 4.97 | 100,838 |
| Croatia Country Quiz | 0 | - | 4.83 | 43,342 |
| Countries that Border Hungary | 0 | - | 4.98 | 104,223 |
| Bosnia and Herzegovina Country Quiz | 0 | - | 4.86 | 35,343 |
| Countries Bordering Serbia | 0 | - | 4.96 | 92,395 |
| Most Popular Baby Girls Names in Germany | 0 | - | 4.51 | 38,796 |
| German Inventions | 0 | - | 3.91 | 30,237 |
| Embarrassing Chapters in German History | 0 | - | 3.40 | 12,630 |
| Roman to Greek God | 0 | - | 4.52 | 122,818 |
| History of Ireland | 0 | - | 4.39 | 31,179 |
| Italian History A-Z | 0 | - | 4.21 | 17,707 |
| The Life of Julius Caesar | 0 | - | 4.39 | 39,085 |
| Roman History by Picture | 0 | - | 4.46 | 26,466 |
| Byzantine History | 0 | - | 4.91 | 28,867 |
| Byzantine Emperors | 0 | - | 4.92 | 14,104 |
| History of The Netherlands | 0 | - | 4.46 | 17,434 |
| Denmark Country Quiz | 0 | - | 4.78 | 75,917 |
| Finland Country Quiz | 0 | - | 4.50 | 59,678 |
| Norway Country Quiz | 0 | - | 4.44 | 77,341 |
| Iceland Country Quiz | 0 | - | 4.69 | 43,162 |
| Biggest Spanish Empire Countries | 0 | - | 4.91 | 115,989 |
| Spanish History A-Z | 0 | - | 4.37 | 19,294 |
| Countries Bordering Spain | 0 | - | 4.51 | 69,432 |
| UK Immigration by Country | 0 | - | 4.94 | 140,894 |
| Arthurian Legend | 0 | - | 4.33 | 25,109 |
| United Kingdom Country Quiz | 0 | - | 4.96 | 139,791 |
| British Monopoly Board | 0 | - | 4.52 | 41,167 |
