| The Trojan War | 0 | - | 4.83 | 40,126 |
| Greek Mythology General Knowledge #1 | 0 | - | 4.85 | 113,371 |
| Letters of the Greek Alphabet | 0 | - | 4.97 | 653,434 |
| Name that Greek Letter | 0 | - | 4.93 | 325,423 |
| Ancient Greek Trivia | 0 | - | 4.62 | 67,305 |
| Geography of Ancient Greece | 0 | - | 4.69 | 32,081 |
| Ancient Roman Trivia #1 | 0 | - | 4.85 | 85,736 |
| Roman Emperors | 0 | - | 4.95 | 121,534 |
| Greek Mythology General Knowledge #2 | 0 | - | 4.59 | 74,557 |
| Ancient Greece - Multiple Choice | 0 | - | 4.54 | 41,910 |
| 101 Figures from Greek Mythology | 0 | - | 4.99 | 128,139 |
| Name the English Monarchs | 0 | - | 4.91 | 507,745 |
| The Life of Alexander the Great | 0 | - | 4.51 | 18,598 |
| Ancient Roman Trivia #2 | 0 | - | 4.61 | 44,417 |
| Geography of the Roman Empire | 0 | - | 4.55 | 52,284 |
| Roman Names for Places | 0 | - | 4.62 | 58,821 |
| Ancient Greek Inventions | 0 | - | 4.18 | 16,430 |
| States of the German Confederation in 1848 | 0 | - | 4.90 | 32,536 |
| Olympian Gods Quiz | 0 | - | 4.96 | 504,770 |
| Medieval English History | 0 | - | 4.53 | 43,700 |
| Countries of Europe in 1815 With a Map | 0 | - | 4.99 | 151,659 |
| Countries of Europe in 1848 | 0 | - | 4.98 | 86,291 |
| Countries of Europe in 1870 with a Map | 0 | - | 4.95 | 66,116 |
| Every Country of Europe Since 1815 With a Map | 0 | - | 4.97 | 72,096 |
| Countries of Europe in 1360 with a Map | 0 | - | 4.99 | 57,798 |
| Countries Bordering France | 0 | - | 4.83 | 405,538 |
| Countries Bordering Germany | 0 | - | 4.99 | 372,398 |
| Ancient Greek Words | 0 | - | 4.93 | 112,743 |
| Seven Hills of Rome | 0 | - | 4.70 | 9,278 |
| The Reign of Queen Elizabeth I | 0 | - | 4.53 | 32,014 |
| Houses of British Monarchs | 0 | - | 4.54 | 66,051 |
| British History Multiple Choice #1 | 0 | - | 4.46 | 55,366 |
| British History Multiple Choice #2 | 0 | - | 4.42 | 38,116 |
| Europe Map Quiz | 0 | - | 5.00 | 4,795,599 |
| Andorra Country Quiz | 0 | - | 4.91 | 32,031 |
| France Cities Map Quiz | 0 | - | 4.96 | 168,174 |
| Departments of France | 0 | - | 4.93 | 55,494 |
| Germany Country Quiz | 0 | - | 4.82 | 159,178 |
| Germany Cities Map Quiz | 0 | - | 4.87 | 127,323 |
| Regions of Italy Map Quiz | 0 | - | 4.96 | 150,512 |
| Italy Cities Map Quiz | 0 | - | 4.97 | 153,304 |
| Countries Surrounding Rome | 0 | - | 4.97 | 49,800 |
| Spain Cities Map Quiz | 0 | - | 4.87 | 97,664 |
| Regions of Spain Map Quiz | 0 | - | 4.95 | 187,106 |
| Modern-Day Countries of the British Empire in 1921 | 0 | - | 4.99 | 119,145 |
| England or Wales? | 0 | - | 4.94 | 46,096 |
| Biggest Countries in Europe in 1700 | 0 | - | 4.74 | 58,847 |
| French Geography Quiz #1 | 0 | - | 4.89 | 35,326 |
| Countries Bordering Austria | 0 | - | 4.97 | 119,091 |
| Countries that Visit France the Most | 0 | - | 4.85 | 46,255 |
| Countries Closest to Metropolitan France | 0 | - | 4.89 | 72,611 |
| Countries With the Most German Speakers | 0 | - | 4.89 | 99,329 |
| Greece Country Quiz | 0 | - | 4.74 | 66,752 |
| Ancient Greece A-Z | 0 | - | 4.60 | 23,264 |
| Counties of Ireland | 0 | - | 4.92 | 197,809 |
| Countries Bordering Italy | 0 | - | 4.94 | 101,416 |
| Countries Closest to Italy | 0 | - | 4.97 | 199,813 |
| Countries Closest to Spain | 0 | - | 4.96 | 228,489 |
| Counties of the UK and Ireland | 0 | - | 4.98 | 132,770 |
| Embarrassing Chapters in British History | 0 | - | 4.31 | 32,419 |
| History of Scotland | 0 | - | 4.51 | 21,199 |
| World Capitals Closest to London | 0 | - | 4.88 | 111,468 |
| 50 Busiest Air Routes from London | 0 | - | 4.87 | 97,466 |
| Europe by Borders in 30 Seconds | 0 | - | 4.98 | 431,619 |
| Kings of France Quiz | 0 | - | 4.22 | 32,979 |
| The Reign of Napoleon | 0 | - | 4.54 | 39,251 |
| Countries that Beat Germany | 0 | - | 4.94 | 107,577 |
| Most-Mentioned Characters in the Iliad | 0 | - | 4.81 | 21,098 |
| Figures from Greek Mythology | 0 | - | 4.92 | 194,701 |
| Countries Italy Declared War On | 0 | - | 4.77 | 50,670 |
| Countries that Beat Italy | 0 | - | 4.85 | 55,342 |
| Countries that Beat Portugal | 0 | - | 4.86 | 60,051 |
| Countries that Beat Spain | 0 | - | 4.94 | 63,470 |
| Commonwealth of Nations Countries | 0 | - | 4.95 | 238,688 |
| English Royal Consorts | 0 | - | 4.38 | 37,574 |
| Countries That Use the Euro | 0 | - | 4.95 | 107,410 |
| Europe Cities Map Quiz | 0 | - | 4.99 | 366,736 |
| 10 Easternmost Countries in Europe | 0 | - | 4.87 | 117,632 |
| The Only European Country ... | 0 | - | 4.91 | 219,813 |
| European Countries NOT in NATO | 0 | - | 4.91 | 62,949 |
| Flags of Europe Quiz | 0 | - | 4.99 | 1,262,753 |
| Countries of Europe - One Minute Sprint | 0 | - | 4.94 | 1,337,841 |
| History of Russia Quiz | 0 | - | 4.47 | 32,033 |
| French History Multiple Choice | 0 | - | 4.55 | 33,288 |
| Countries that Beat Greece | 0 | - | 4.53 | 49,591 |
| History of Italy | 0 | - | 4.55 | 32,201 |
| Geography of the Dutch Empire | 0 | - | 4.62 | 34,868 |
| Countries of the Spanish Empire | 0 | - | 4.52 | 77,485 |
| Counties of England | 0 | - | 4.97 | 804,841 |
| Invasions of Great Britain | 0 | - | 4.51 | 60,159 |
| Oldest Cities in the United Kingdom | 0 | - | 4.39 | 23,845 |
| History of London | 0 | - | 4.33 | 26,290 |
| British History Quiz for Dummies | 0 | - | 4.70 | 79,193 |
| "Big Five" European Soccer Champions Since 2000 | 0 | - | 4.97 | 363,131 |
| 10 Biggest European Countries by Area | 0 | - | 4.99 | 193,864 |
| 10 Westernmost Countries in Europe | 0 | - | 4.96 | 152,604 |
| Top 10 Languages Spoken in Europe | 0 | - | 4.96 | 221,480 |
| European Landmarks Map Quiz | 0 | - | 4.97 | 87,965 |
| Countries of Europe with an Empty Map | 0 | - | 5.00 | 313,367 |
| All First-Level Subdivisions of Europe on a Map | 0 | - | 4.99 | 176,826 |
| Countries with Territory in the Balkans | 0 | - | 4.96 | 90,455 |
| Eastern Europe Map Quiz | 0 | - | 4.91 | 128,970 |
| Slavic Countries | 0 | - | 4.96 | 112,575 |
| Famous Ancient Romans | 0 | - | 4.70 | 85,870 |
| Roman Numeral Decoding Quiz | 0 | - | 4.94 | 440,715 |
| Two Letter Roman Numerals | 0 | - | 4.97 | 56,663 |
| UK Cities Map Quiz | 0 | - | 4.96 | 466,989 |
| The Reign of Henry VIII | 0 | - | 4.25 | 27,906 |
| Elizabeth I... or Elizabeth II? | 0 | - | 4.30 | 24,579 |
| Champions League Winners | 0 | - | 4.92 | 1,018,820 |
| European Geography By Letter - P #1 | 0 | - | 4.81 | 99,295 |
| European Diaspora - Top 11 Countries | 0 | - | 4.88 | 97,043 |
| 10 European Countries with the Most Tourists | 0 | - | 4.98 | 138,814 |
| Three Band Flags of Europe | 0 | - | 4.98 | 194,987 |
| Pixelated Europe Map | 0 | - | 4.88 | 123,731 |
| Monarchies of Europe | 0 | - | 4.90 | 99,105 |
| European Countries with One Border | 0 | - | 4.97 | 184,124 |
| European Countries with the Fewest Borders | 0 | - | 4.97 | 180,837 |
| European Geography By Letter - B #2 | 0 | - | 4.87 | 89,371 |
| Federal Subjects of Russia | 0 | - | 4.95 | 150,067 |
| Countries That Border Russia | 0 | - | 4.98 | 465,127 |
| Countries Formerly in Yugoslavia | 0 | - | 4.95 | 125,634 |
| History of Austria | 0 | - | 4.70 | 17,995 |
| Austria Country Quiz | 0 | - | 4.57 | 60,154 |
| Belgium Country Quiz | 0 | - | 4.72 | 72,418 |
| France Country Quiz | 0 | - | 4.70 | 135,875 |
| Regions of France Map Quiz | 0 | - | 4.97 | 145,885 |
| Geography of the French Empire | 0 | - | 4.45 | 27,243 |
| The French Revolution | 0 | - | 4.47 | 24,175 |
| History of France | 0 | - | 4.61 | 57,776 |
| French History A-Z | 0 | - | 4.27 | 25,219 |
| States of Germany Map Quiz | 0 | - | 4.92 | 134,076 |
| States of Germany | 0 | - | 4.95 | 155,074 |
| Biggest Cities in Germany in 1910 | 0 | - | 4.41 | 23,582 |
| Germany Immigration by Country | 0 | - | 4.86 | 81,870 |
| Regions of Italy | 0 | - | 4.92 | 77,339 |
| Italy Country Quiz | 0 | - | 4.77 | 124,282 |
| Luxembourg Country Quiz | 0 | - | 4.78 | 34,009 |
| Monaco Country Quiz | 0 | - | 4.48 | 41,740 |
| Netherlands Country Quiz | 0 | - | 4.52 | 81,093 |
| Netherlands Immigration by Country | 0 | - | 4.93 | 52,978 |
| Nordic Cities Map Quiz | 0 | - | 4.77 | 90,830 |
| The Vikings! | 0 | - | 4.46 | 28,434 |
| Sweden Immigration by Country | 0 | - | 4.53 | 56,458 |
| Portugal Country Quiz | 0 | - | 4.69 | 72,475 |
| The Portuguese Empire | 0 | - | 4.58 | 12,120 |
| Spain Country Quiz | 0 | - | 4.44 | 129,473 |
| Regions of Spain Quiz | 0 | - | 4.91 | 115,691 |
| Switzerland Country Quiz | 0 | - | 4.52 | 63,760 |
| Cantons of Switzerland | 0 | - | 4.98 | 51,972 |
| Countries and Territories of the United Kingdom | 0 | - | 4.90 | 94,702 |
| United Kingdom A-Z | 0 | - | 4.51 | 88,509 |
| Largest Islands in the British Isles With a Map | 0 | - | 4.52 | 38,893 |
| Wives of King Henry VIII | 0 | - | 4.55 | 53,499 |
| Countries the UK Declared War On | 0 | - | 4.55 | 123,420 |
| Geography of the British Empire | 0 | - | 4.48 | 39,893 |
| Animals in British History | 0 | - | 4.43 | 26,132 |
| 10 Closest Megacities to London | 0 | - | 4.90 | 17,879 |
| Counties of Wales | 0 | - | 4.63 | 39,687 |
| U.S. Presidents Quiz | 0 | - | 5.00 | 3,733,491 |
| Deadliest U.S. Wars | 0 | - | 4.89 | 192,102 |
| Top 10 Coldest European Countries | 0 | - | 4.94 | 194,147 |
| Top 10 Hottest European Countries | 0 | - | 4.88 | 128,046 |
| Countries That Touch the Adriatic Sea | 0 | - | 4.96 | 71,423 |
| Top 10 European Countries by Coastline | 0 | - | 4.86 | 138,856 |
| 100 Longest Rivers in Europe - with a Map | 0 | - | 4.94 | 66,097 |
| Category Elimination - European Geography #1 | 0 | - | 4.98 | 236,533 |
| European Map without 10 Random Countries | 0 | - | 4.97 | 279,490 |
| Category Elimination - European Geography #2 | 0 | - | 4.99 | 169,421 |
| Category Elimination - European Countries #1 | 0 | - | 4.90 | 91,344 |
| Name a Valid European Country #1 | 0 | - | 4.99 | 265,684 |
| Name a Valid European Country #2 | 0 | - | 4.94 | 116,217 |
| Countries that Border Poland | 0 | - | 4.99 | 173,415 |
| Russia Country Quiz | 0 | - | 4.83 | 115,526 |
| Non-Bordering Countries Closest to Russia | 0 | - | 4.91 | 83,385 |
| Countries With the Most Russian Speakers | 0 | - | 4.97 | 103,491 |
| Croatia Country Quiz | 0 | - | 4.83 | 43,878 |
| Countries that Border Hungary | 0 | - | 4.98 | 105,138 |
| Bosnia and Herzegovina Country Quiz | 0 | - | 4.85 | 35,677 |
| Countries Bordering Serbia | 0 | - | 4.96 | 93,264 |
| Most Popular Baby Girls Names in Germany | 0 | - | 4.51 | 39,036 |
| German Inventions | 0 | - | 3.91 | 30,290 |
| Embarrassing Chapters in German History | 0 | - | 3.40 | 12,699 |
| Roman to Greek God | 0 | - | 4.52 | 123,573 |
| History of Ireland | 0 | - | 4.39 | 31,515 |
| Italian History A-Z | 0 | - | 4.16 | 17,966 |
| The Life of Julius Caesar | 0 | - | 4.39 | 39,203 |
| Roman History by Picture | 0 | - | 4.46 | 26,621 |
| Byzantine History | 0 | - | 4.91 | 29,067 |
| Byzantine Emperors | 0 | - | 4.93 | 14,677 |
| History of The Netherlands | 0 | - | 4.46 | 17,582 |
| Denmark Country Quiz | 0 | - | 4.78 | 76,365 |
| Finland Country Quiz | 0 | - | 4.51 | 60,119 |
| Norway Country Quiz | 0 | - | 4.45 | 77,959 |
| Iceland Country Quiz | 0 | - | 4.69 | 43,450 |
| Biggest Spanish Empire Countries | 0 | - | 4.91 | 117,195 |
| Spanish History A-Z | 0 | - | 4.37 | 19,547 |
| Countries Bordering Spain | 0 | - | 4.51 | 69,801 |
| UK Immigration by Country | 0 | - | 4.94 | 141,963 |
| Arthurian Legend | 0 | - | 4.33 | 25,201 |
