| The Trojan War | 0 | - | 4.83 | 39,954 |
| Greek Mythology General Knowledge #1 | 0 | - | 4.85 | 112,836 |
| Letters of the Greek Alphabet | 0 | - | 4.97 | 651,347 |
| Name that Greek Letter | 0 | - | 4.93 | 324,851 |
| Ancient Greek Trivia | 0 | - | 4.62 | 67,208 |
| Geography of Ancient Greece | 0 | - | 4.69 | 32,026 |
| Ancient Roman Trivia #1 | 0 | - | 4.85 | 85,549 |
| Roman Emperors | 0 | - | 4.95 | 121,086 |
| Greek Mythology General Knowledge #2 | 0 | - | 4.59 | 74,243 |
| Ancient Greece - Multiple Choice | 0 | - | 4.54 | 41,822 |
| 101 Figures from Greek Mythology | 0 | - | 4.99 | 127,362 |
| Name the English Monarchs | 0 | - | 4.91 | 505,976 |
| The Life of Alexander the Great | 0 | - | 4.51 | 18,570 |
| Ancient Roman Trivia #2 | 0 | - | 4.61 | 44,240 |
| Geography of the Roman Empire | 0 | - | 4.55 | 52,189 |
| Roman Names for Places | 0 | - | 4.62 | 58,667 |
| Ancient Greek Inventions | 0 | - | 4.18 | 16,407 |
| States of the German Confederation in 1848 | 0 | - | 4.90 | 32,400 |
| Olympian Gods Quiz | 0 | - | 4.96 | 503,433 |
| Medieval English History | 0 | - | 4.53 | 43,638 |
| Countries of Europe in 1815 With a Map | 0 | - | 4.99 | 151,246 |
| Countries of Europe in 1848 | 0 | - | 4.98 | 85,132 |
| Countries of Europe in 1870 with a Map | 0 | - | 4.95 | 65,659 |
| Every Country of Europe Since 1815 With a Map | 0 | - | 4.98 | 71,747 |
| Countries of Europe in 1360 with a Map | 0 | - | 4.99 | 57,496 |
| Countries Bordering France | 0 | - | 4.83 | 404,682 |
| Countries Bordering Germany | 0 | - | 4.99 | 371,639 |
| Ancient Greek Words | 0 | - | 4.93 | 112,369 |
| Seven Hills of Rome | 0 | - | 4.70 | 9,255 |
| The Reign of Queen Elizabeth I | 0 | - | 4.53 | 31,940 |
| Houses of British Monarchs | 0 | - | 4.53 | 65,917 |
| British History Multiple Choice #1 | 0 | - | 4.46 | 55,295 |
| British History Multiple Choice #2 | 0 | - | 4.42 | 38,069 |
| Europe Map Quiz | 0 | - | 5.00 | 4,784,727 |
| Andorra Country Quiz | 0 | - | 4.91 | 31,909 |
| France Cities Map Quiz | 0 | - | 4.95 | 167,701 |
| Departments of France | 0 | - | 4.93 | 55,034 |
| Germany Country Quiz | 0 | - | 4.82 | 158,742 |
| Germany Cities Map Quiz | 0 | - | 4.87 | 127,003 |
| Regions of Italy Map Quiz | 0 | - | 4.96 | 150,139 |
| Italy Cities Map Quiz | 0 | - | 4.97 | 152,959 |
| Countries Surrounding Rome | 0 | - | 4.97 | 49,724 |
| Spain Cities Map Quiz | 0 | - | 4.87 | 97,411 |
| Regions of Spain Map Quiz | 0 | - | 4.95 | 186,770 |
| Modern-Day Countries of the British Empire in 1921 | 0 | - | 4.99 | 118,638 |
| England or Wales? | 0 | - | 4.94 | 45,934 |
| Biggest Countries in Europe in 1700 | 0 | - | 4.73 | 58,727 |
| French Geography Quiz #1 | 0 | - | 4.89 | 35,052 |
| Countries Bordering Austria | 0 | - | 4.97 | 118,898 |
| Countries that Visit France the Most | 0 | - | 4.85 | 46,119 |
| Countries Closest to Metropolitan France | 0 | - | 4.89 | 72,438 |
| Countries With the Most German Speakers | 0 | - | 4.89 | 98,432 |
| Greece Country Quiz | 0 | - | 4.74 | 66,599 |
| Ancient Greece A-Z | 0 | - | 4.60 | 23,230 |
| Counties of Ireland | 0 | - | 4.92 | 197,135 |
| Countries Bordering Italy | 0 | - | 4.94 | 101,211 |
| Countries Closest to Italy | 0 | - | 4.97 | 199,258 |
| Countries Closest to Spain | 0 | - | 4.96 | 227,994 |
| Counties of the UK and Ireland | 0 | - | 4.98 | 132,229 |
| Embarrassing Chapters in British History | 0 | - | 4.30 | 32,358 |
| History of Scotland | 0 | - | 4.51 | 21,164 |
| World Capitals Closest to London | 0 | - | 4.88 | 111,024 |
| 50 Busiest Air Routes from London | 0 | - | 4.87 | 97,250 |
| Europe by Borders in 30 Seconds | 0 | - | 4.98 | 430,588 |
| Kings of France Quiz | 0 | - | 4.20 | 32,903 |
| The Reign of Napoleon | 0 | - | 4.54 | 39,116 |
| Countries that Beat Germany | 0 | - | 4.94 | 107,232 |
| Most-Mentioned Characters in the Iliad | 0 | - | 4.81 | 20,944 |
| Figures from Greek Mythology | 0 | - | 4.91 | 188,657 |
| Countries Italy Declared War On | 0 | - | 4.75 | 43,613 |
| Countries that Beat Italy | 0 | - | 4.85 | 55,114 |
| Countries that Beat Portugal | 0 | - | 4.86 | 59,813 |
| Countries that Beat Spain | 0 | - | 4.94 | 63,300 |
| Commonwealth of Nations Countries | 0 | - | 4.94 | 238,183 |
| English Royal Consorts | 0 | - | 4.38 | 37,504 |
| Countries That Use the Euro | 0 | - | 4.95 | 106,582 |
| Europe Cities Map Quiz | 0 | - | 4.99 | 366,040 |
| 10 Easternmost Countries in Europe | 0 | - | 4.87 | 116,964 |
| The Only European Country ... | 0 | - | 4.91 | 218,722 |
| European Countries NOT in NATO | 0 | - | 4.91 | 62,375 |
| Flags of Europe Quiz | 0 | - | 4.99 | 1,256,199 |
| Countries of Europe - One Minute Sprint | 0 | - | 4.94 | 1,334,892 |
| History of Russia Quiz | 0 | - | 4.47 | 31,997 |
| French History Multiple Choice | 0 | - | 4.55 | 33,210 |
| Countries that Beat Greece | 0 | - | 4.53 | 49,461 |
| History of Italy | 0 | - | 4.55 | 32,133 |
| Geography of the Dutch Empire | 0 | - | 4.62 | 34,807 |
| Countries of the Spanish Empire | 0 | - | 4.52 | 77,412 |
| Counties of England | 0 | - | 4.97 | 802,206 |
| Invasions of Great Britain | 0 | - | 4.51 | 60,073 |
| Oldest Cities in the United Kingdom | 0 | - | 4.39 | 23,819 |
| History of London | 0 | - | 4.33 | 26,263 |
| British History Quiz for Dummies | 0 | - | 4.70 | 79,003 |
| "Big Five" European Soccer Champions Since 2000 | 0 | - | 4.97 | 361,060 |
| 10 Biggest European Countries by Area | 0 | - | 4.99 | 193,409 |
| 10 Westernmost Countries in Europe | 0 | - | 4.96 | 151,960 |
| Top 10 Languages Spoken in Europe | 0 | - | 4.96 | 220,534 |
| European Landmarks Map Quiz | 0 | - | 4.97 | 87,708 |
| Countries of Europe with an Empty Map | 0 | - | 5.00 | 312,509 |
| All First-Level Subdivisions of Europe on a Map | 0 | - | 4.99 | 175,421 |
| Countries with Territory in the Balkans | 0 | - | 4.96 | 90,080 |
| Eastern Europe Map Quiz | 0 | - | 4.91 | 128,715 |
| Slavic Countries | 0 | - | 4.96 | 112,298 |
| Famous Ancient Romans | 0 | - | 4.70 | 85,759 |
| Roman Numeral Decoding Quiz | 0 | - | 4.94 | 439,501 |
| Two Letter Roman Numerals | 0 | - | 4.97 | 56,476 |
| UK Cities Map Quiz | 0 | - | 4.96 | 466,238 |
| The Reign of Henry VIII | 0 | - | 4.25 | 27,856 |
| Elizabeth I... or Elizabeth II? | 0 | - | 4.30 | 24,561 |
| Champions League Winners | 0 | - | 4.92 | 1,015,046 |
| European Geography By Letter - P #1 | 0 | - | 4.81 | 98,648 |
| European Diaspora - Top 11 Countries | 0 | - | 4.90 | 96,419 |
| 10 European Countries with the Most Tourists | 0 | - | 4.98 | 138,386 |
| Three Band Flags of Europe | 0 | - | 4.98 | 194,439 |
| Pixelated Europe Map | 0 | - | 4.88 | 123,395 |
| Monarchies of Europe | 0 | - | 4.90 | 98,777 |
| European Countries with One Border | 0 | - | 4.97 | 183,669 |
| European Countries with the Fewest Borders | 0 | - | 4.97 | 180,424 |
| European Geography By Letter - B #2 | 0 | - | 4.87 | 88,448 |
| Federal Subjects of Russia | 0 | - | 4.95 | 149,292 |
| Countries That Border Russia | 0 | - | 4.98 | 464,282 |
| Countries Formerly in Yugoslavia | 0 | - | 4.95 | 125,418 |
| History of Austria | 0 | - | 4.70 | 17,967 |
| Austria Country Quiz | 0 | - | 4.57 | 60,020 |
| Belgium Country Quiz | 0 | - | 4.72 | 72,203 |
| France Country Quiz | 0 | - | 4.70 | 135,582 |
| Regions of France Map Quiz | 0 | - | 4.97 | 145,533 |
| Geography of the French Empire | 0 | - | 4.45 | 27,207 |
| The French Revolution | 0 | - | 4.47 | 24,133 |
| History of France | 0 | - | 4.61 | 57,553 |
| French History A-Z | 0 | - | 4.27 | 25,093 |
| States of Germany Map Quiz | 0 | - | 4.92 | 133,692 |
| States of Germany | 0 | - | 4.95 | 154,284 |
| Biggest Cities in Germany in 1910 | 0 | - | 4.41 | 23,554 |
| Germany Immigration by Country | 0 | - | 4.86 | 81,632 |
| Regions of Italy | 0 | - | 4.92 | 76,938 |
| Italy Country Quiz | 0 | - | 4.77 | 123,969 |
| Luxembourg Country Quiz | 0 | - | 4.78 | 33,929 |
| Monaco Country Quiz | 0 | - | 4.48 | 41,674 |
| Netherlands Country Quiz | 0 | - | 4.52 | 80,896 |
| Netherlands Immigration by Country | 0 | - | 4.93 | 52,749 |
| Nordic Cities Map Quiz | 0 | - | 4.77 | 90,698 |
| The Vikings! | 0 | - | 4.46 | 28,400 |
| Sweden Immigration by Country | 0 | - | 4.53 | 56,356 |
| Portugal Country Quiz | 0 | - | 4.69 | 72,274 |
| The Portuguese Empire | 0 | - | 4.58 | 12,099 |
| Spain Country Quiz | 0 | - | 4.44 | 129,176 |
| Regions of Spain Quiz | 0 | - | 4.90 | 115,195 |
| Switzerland Country Quiz | 0 | - | 4.51 | 63,618 |
| Cantons of Switzerland | 0 | - | 4.98 | 51,702 |
| Countries and Territories of the United Kingdom | 0 | - | 4.90 | 94,466 |
| United Kingdom A-Z | 0 | - | 4.51 | 88,331 |
| Largest Islands in the British Isles With a Map | 0 | - | 4.52 | 38,841 |
| Wives of King Henry VIII | 0 | - | 4.55 | 53,446 |
| Countries the UK Declared War On | 0 | - | 4.55 | 123,191 |
| Geography of the British Empire | 0 | - | 4.48 | 39,835 |
| Animals in British History | 0 | - | 4.43 | 26,085 |
| 10 Closest Megacities to London | 0 | - | 4.90 | 17,831 |
| Counties of Wales | 0 | - | 4.63 | 39,576 |
| U.S. Presidents Quiz | 0 | - | 5.00 | 3,722,831 |
| Deadliest U.S. Wars | 0 | - | 4.89 | 191,681 |
| Top 10 Coldest European Countries | 0 | - | 4.94 | 193,788 |
| Top 10 Hottest European Countries | 0 | - | 4.88 | 127,710 |
| Countries That Touch the Adriatic Sea | 0 | - | 4.96 | 71,320 |
| Top 10 European Countries by Coastline | 0 | - | 4.88 | 138,685 |
| 100 Longest Rivers in Europe - with a Map | 0 | - | 4.94 | 65,881 |
| Category Elimination - European Geography #1 | 0 | - | 4.98 | 235,558 |
| European Map without 10 Random Countries | 0 | - | 4.97 | 278,736 |
| Category Elimination - European Geography #2 | 0 | - | 4.99 | 168,716 |
| Category Elimination - European Countries #1 | 0 | - | 4.90 | 90,972 |
| Name a Valid European Country #1 | 0 | - | 4.99 | 264,272 |
| Name a Valid European Country #2 | 0 | - | 4.94 | 115,779 |
| Countries that Border Poland | 0 | - | 4.99 | 173,077 |
| Russia Country Quiz | 0 | - | 4.83 | 115,250 |
| Non-Bordering Countries Closest to Russia | 0 | - | 4.91 | 83,220 |
| Countries With the Most Russian Speakers | 0 | - | 4.97 | 102,595 |
| Croatia Country Quiz | 0 | - | 4.83 | 43,698 |
| Countries that Border Hungary | 0 | - | 4.98 | 104,966 |
| Bosnia and Herzegovina Country Quiz | 0 | - | 4.86 | 35,554 |
| Countries Bordering Serbia | 0 | - | 4.96 | 93,013 |
| Most Popular Baby Girls Names in Germany | 0 | - | 4.51 | 38,975 |
| German Inventions | 0 | - | 3.91 | 30,280 |
| Embarrassing Chapters in German History | 0 | - | 3.40 | 12,682 |
| Roman to Greek God | 0 | - | 4.52 | 123,297 |
| History of Ireland | 0 | - | 4.39 | 31,407 |
| Italian History A-Z | 0 | - | 4.16 | 17,911 |
| The Life of Julius Caesar | 0 | - | 4.39 | 39,166 |
| Roman History by Picture | 0 | - | 4.46 | 26,572 |
| Byzantine History | 0 | - | 4.91 | 29,011 |
| Byzantine Emperors | 0 | - | 4.93 | 14,556 |
| History of The Netherlands | 0 | - | 4.46 | 17,542 |
| Denmark Country Quiz | 0 | - | 4.78 | 76,226 |
| Finland Country Quiz | 0 | - | 4.51 | 59,966 |
| Norway Country Quiz | 0 | - | 4.45 | 77,768 |
| Iceland Country Quiz | 0 | - | 4.69 | 43,365 |
| Biggest Spanish Empire Countries | 0 | - | 4.91 | 116,745 |
| Spanish History A-Z | 0 | - | 4.37 | 19,493 |
| Countries Bordering Spain | 0 | - | 4.51 | 69,670 |
| UK Immigration by Country | 0 | - | 4.94 | 141,607 |
| Arthurian Legend | 0 | - | 4.33 | 25,166 |
