| The Trojan War | 0 | - | 4.83 | 40,122 |
| Greek Mythology General Knowledge #1 | 0 | - | 4.85 | 113,358 |
| Letters of the Greek Alphabet | 0 | - | 4.97 | 653,367 |
| Name that Greek Letter | 0 | - | 4.93 | 325,406 |
| Ancient Greek Trivia | 0 | - | 4.62 | 67,303 |
| Geography of Ancient Greece | 0 | - | 4.69 | 32,081 |
| Ancient Roman Trivia #1 | 0 | - | 4.85 | 85,730 |
| Roman Emperors | 0 | - | 4.95 | 121,523 |
| Greek Mythology General Knowledge #2 | 0 | - | 4.59 | 74,544 |
| Ancient Greece - Multiple Choice | 0 | - | 4.54 | 41,909 |
| 101 Figures from Greek Mythology | 0 | - | 4.99 | 128,115 |
| Name the English Monarchs | 0 | - | 4.91 | 507,667 |
| 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 | 52,282 |
| Roman Names for Places | 0 | - | 4.62 | 58,817 |
| Ancient Greek Inventions | 0 | - | 4.18 | 16,429 |
| States of the German Confederation in 1848 | 0 | - | 4.90 | 32,533 |
| Olympian Gods Quiz | 0 | - | 4.96 | 504,724 |
| Medieval English History | 0 | - | 4.53 | 43,700 |
| Countries of Europe in 1815 With a Map | 0 | - | 4.99 | 151,649 |
| Countries of Europe in 1848 | 0 | - | 4.98 | 86,256 |
| Countries of Europe in 1870 with a Map | 0 | - | 4.95 | 66,098 |
| Every Country of Europe Since 1815 With a Map | 0 | - | 4.97 | 72,083 |
| Countries of Europe in 1360 with a Map | 0 | - | 4.99 | 57,790 |
| Countries Bordering France | 0 | - | 4.83 | 405,506 |
| Countries Bordering Germany | 0 | - | 4.99 | 372,376 |
| Ancient Greek Words | 0 | - | 4.93 | 112,739 |
| Seven Hills of Rome | 0 | - | 4.70 | 9,278 |
| The Reign of Queen Elizabeth I | 0 | - | 4.53 | 32,011 |
| Houses of British Monarchs | 0 | - | 4.54 | 66,046 |
| British History Multiple Choice #1 | 0 | - | 4.46 | 55,364 |
| British History Multiple Choice #2 | 0 | - | 4.42 | 38,115 |
| Europe Map Quiz | 0 | - | 5.00 | 4,795,213 |
| Andorra Country Quiz | 0 | - | 4.91 | 32,022 |
| France Cities Map Quiz | 0 | - | 4.96 | 168,075 |
| Departments of France | 0 | - | 4.93 | 55,467 |
| Germany Country Quiz | 0 | - | 4.82 | 159,155 |
| Germany Cities Map Quiz | 0 | - | 4.87 | 127,310 |
| Regions of Italy Map Quiz | 0 | - | 4.96 | 150,487 |
| Italy Cities Map Quiz | 0 | - | 4.97 | 153,290 |
| Countries Surrounding Rome | 0 | - | 4.97 | 49,795 |
| Spain Cities Map Quiz | 0 | - | 4.87 | 97,653 |
| Regions of Spain Map Quiz | 0 | - | 4.95 | 187,092 |
| Modern-Day Countries of the British Empire in 1921 | 0 | - | 4.99 | 119,132 |
| England or Wales? | 0 | - | 4.94 | 46,093 |
| Biggest Countries in Europe in 1700 | 0 | - | 4.74 | 58,843 |
| French Geography Quiz #1 | 0 | - | 4.89 | 35,322 |
| Countries Bordering Austria | 0 | - | 4.97 | 119,082 |
| Countries that Visit France the Most | 0 | - | 4.85 | 46,253 |
| Countries Closest to Metropolitan France | 0 | - | 4.89 | 72,598 |
| Countries With the Most German Speakers | 0 | - | 4.89 | 99,297 |
| Greece Country Quiz | 0 | - | 4.74 | 66,748 |
| Ancient Greece A-Z | 0 | - | 4.60 | 23,264 |
| Counties of Ireland | 0 | - | 4.92 | 197,787 |
| Countries Bordering Italy | 0 | - | 4.94 | 101,405 |
| Countries Closest to Italy | 0 | - | 4.97 | 199,788 |
| Countries Closest to Spain | 0 | - | 4.96 | 228,474 |
| Counties of the UK and Ireland | 0 | - | 4.98 | 132,741 |
| Embarrassing Chapters in British History | 0 | - | 4.31 | 32,418 |
| History of Scotland | 0 | - | 4.51 | 21,199 |
| World Capitals Closest to London | 0 | - | 4.88 | 111,463 |
| 50 Busiest Air Routes from London | 0 | - | 4.87 | 97,456 |
| Europe by Borders in 30 Seconds | 0 | - | 4.98 | 431,569 |
| Kings of France Quiz | 0 | - | 4.22 | 32,976 |
| The Reign of Napoleon | 0 | - | 4.54 | 39,242 |
| Countries that Beat Germany | 0 | - | 4.94 | 107,563 |
| Most-Mentioned Characters in the Iliad | 0 | - | 4.81 | 21,089 |
| Figures from Greek Mythology | 0 | - | 4.92 | 194,532 |
| Countries Italy Declared War On | 0 | - | 4.77 | 50,137 |
| Countries that Beat Italy | 0 | - | 4.85 | 55,336 |
| Countries that Beat Portugal | 0 | - | 4.86 | 60,039 |
| Countries that Beat Spain | 0 | - | 4.94 | 63,465 |
| Commonwealth of Nations Countries | 0 | - | 4.95 | 238,673 |
| English Royal Consorts | 0 | - | 4.38 | 37,574 |
| Countries That Use the Euro | 0 | - | 4.95 | 107,374 |
| Europe Cities Map Quiz | 0 | - | 4.99 | 366,702 |
| 10 Easternmost Countries in Europe | 0 | - | 4.87 | 117,605 |
| The Only European Country ... | 0 | - | 4.91 | 219,767 |
| European Countries NOT in NATO | 0 | - | 4.91 | 62,926 |
| Flags of Europe Quiz | 0 | - | 4.99 | 1,262,517 |
| Countries of Europe - One Minute Sprint | 0 | - | 4.94 | 1,337,750 |
| History of Russia Quiz | 0 | - | 4.47 | 32,032 |
| French History Multiple Choice | 0 | - | 4.55 | 33,285 |
| Countries that Beat Greece | 0 | - | 4.53 | 49,583 |
| History of Italy | 0 | - | 4.55 | 32,199 |
| Geography of the Dutch Empire | 0 | - | 4.62 | 34,867 |
| Countries of the Spanish Empire | 0 | - | 4.52 | 77,482 |
| Counties of England | 0 | - | 4.97 | 804,738 |
| Invasions of Great Britain | 0 | - | 4.51 | 60,156 |
| Oldest Cities in the United Kingdom | 0 | - | 4.39 | 23,844 |
| History of London | 0 | - | 4.33 | 26,289 |
| British History Quiz for Dummies | 0 | - | 4.70 | 79,186 |
| "Big Five" European Soccer Champions Since 2000 | 0 | - | 4.97 | 363,047 |
| 10 Biggest European Countries by Area | 0 | - | 4.99 | 193,853 |
| 10 Westernmost Countries in Europe | 0 | - | 4.96 | 152,595 |
| Top 10 Languages Spoken in Europe | 0 | - | 4.96 | 221,444 |
| European Landmarks Map Quiz | 0 | - | 4.97 | 87,953 |
| Countries of Europe with an Empty Map | 0 | - | 5.00 | 313,343 |
| All First-Level Subdivisions of Europe on a Map | 0 | - | 4.99 | 176,767 |
| Countries with Territory in the Balkans | 0 | - | 4.96 | 90,434 |
| Eastern Europe Map Quiz | 0 | - | 4.91 | 128,961 |
| Slavic Countries | 0 | - | 4.96 | 112,568 |
| Famous Ancient Romans | 0 | - | 4.70 | 85,868 |
| Roman Numeral Decoding Quiz | 0 | - | 4.94 | 440,673 |
| Two Letter Roman Numerals | 0 | - | 4.97 | 56,659 |
| UK Cities Map Quiz | 0 | - | 4.96 | 466,965 |
| The Reign of Henry VIII | 0 | - | 4.25 | 27,904 |
| Elizabeth I... or Elizabeth II? | 0 | - | 4.30 | 24,577 |
| Champions League Winners | 0 | - | 4.92 | 1,018,633 |
| European Geography By Letter - P #1 | 0 | - | 4.81 | 99,265 |
| European Diaspora - Top 11 Countries | 0 | - | 4.88 | 97,035 |
| 10 European Countries with the Most Tourists | 0 | - | 4.98 | 138,802 |
| Three Band Flags of Europe | 0 | - | 4.98 | 194,966 |
| Pixelated Europe Map | 0 | - | 4.88 | 123,724 |
| Monarchies of Europe | 0 | - | 4.90 | 99,089 |
| European Countries with One Border | 0 | - | 4.97 | 184,107 |
| European Countries with the Fewest Borders | 0 | - | 4.97 | 180,822 |
| European Geography By Letter - B #2 | 0 | - | 4.87 | 89,315 |
| Federal Subjects of Russia | 0 | - | 4.95 | 150,036 |
| Countries That Border Russia | 0 | - | 4.98 | 465,092 |
| Countries Formerly in Yugoslavia | 0 | - | 4.95 | 125,629 |
| History of Austria | 0 | - | 4.70 | 17,992 |
| Austria Country Quiz | 0 | - | 4.57 | 60,146 |
| Belgium Country Quiz | 0 | - | 4.72 | 72,412 |
| France Country Quiz | 0 | - | 4.70 | 135,861 |
| Regions of France Map Quiz | 0 | - | 4.97 | 145,871 |
| Geography of the French Empire | 0 | - | 4.45 | 27,242 |
| The French Revolution | 0 | - | 4.47 | 24,175 |
| History of France | 0 | - | 4.61 | 57,765 |
| French History A-Z | 0 | - | 4.27 | 25,214 |
| States of Germany Map Quiz | 0 | - | 4.92 | 134,056 |
| States of Germany | 0 | - | 4.95 | 155,055 |
| Biggest Cities in Germany in 1910 | 0 | - | 4.41 | 23,581 |
| Germany Immigration by Country | 0 | - | 4.86 | 81,858 |
| Regions of Italy | 0 | - | 4.92 | 77,318 |
| Italy Country Quiz | 0 | - | 4.77 | 124,277 |
| Luxembourg Country Quiz | 0 | - | 4.78 | 34,003 |
| Monaco Country Quiz | 0 | - | 4.48 | 41,739 |
| Netherlands Country Quiz | 0 | - | 4.52 | 81,083 |
| Netherlands Immigration by Country | 0 | - | 4.93 | 52,965 |
| Nordic Cities Map Quiz | 0 | - | 4.77 | 90,827 |
| The Vikings! | 0 | - | 4.46 | 28,433 |
| Sweden Immigration by Country | 0 | - | 4.53 | 56,453 |
| Portugal Country Quiz | 0 | - | 4.69 | 72,458 |
| The Portuguese Empire | 0 | - | 4.58 | 12,120 |
| Spain Country Quiz | 0 | - | 4.44 | 129,462 |
| Regions of Spain Quiz | 0 | - | 4.91 | 115,681 |
| Switzerland Country Quiz | 0 | - | 4.52 | 63,752 |
| Cantons of Switzerland | 0 | - | 4.98 | 51,962 |
| Countries and Territories of the United Kingdom | 0 | - | 4.90 | 94,694 |
| United Kingdom A-Z | 0 | - | 4.51 | 88,501 |
| Largest Islands in the British Isles With a Map | 0 | - | 4.52 | 38,892 |
| Wives of King Henry VIII | 0 | - | 4.55 | 53,498 |
| Countries the UK Declared War On | 0 | - | 4.55 | 123,414 |
| Geography of the British Empire | 0 | - | 4.48 | 39,890 |
| Animals in British History | 0 | - | 4.43 | 26,130 |
| 10 Closest Megacities to London | 0 | - | 4.90 | 17,879 |
| Counties of Wales | 0 | - | 4.63 | 39,684 |
| U.S. Presidents Quiz | 0 | - | 5.00 | 3,733,175 |
| Deadliest U.S. Wars | 0 | - | 4.89 | 192,092 |
| Top 10 Coldest European Countries | 0 | - | 4.94 | 194,143 |
| Top 10 Hottest European Countries | 0 | - | 4.88 | 128,038 |
| Countries That Touch the Adriatic Sea | 0 | - | 4.96 | 71,420 |
| Top 10 European Countries by Coastline | 0 | - | 4.86 | 138,854 |
| 100 Longest Rivers in Europe - with a Map | 0 | - | 4.94 | 66,092 |
| Category Elimination - European Geography #1 | 0 | - | 4.98 | 236,496 |
| European Map without 10 Random Countries | 0 | - | 4.97 | 279,465 |
| Category Elimination - European Geography #2 | 0 | - | 4.99 | 169,397 |
| Category Elimination - European Countries #1 | 0 | - | 4.90 | 91,332 |
| Name a Valid European Country #1 | 0 | - | 4.99 | 265,634 |
| Name a Valid European Country #2 | 0 | - | 4.94 | 116,196 |
| Countries that Border Poland | 0 | - | 4.99 | 173,405 |
| Russia Country Quiz | 0 | - | 4.83 | 115,510 |
| Non-Bordering Countries Closest to Russia | 0 | - | 4.91 | 83,377 |
| Countries With the Most Russian Speakers | 0 | - | 4.97 | 103,465 |
| Croatia Country Quiz | 0 | - | 4.83 | 43,869 |
| Countries that Border Hungary | 0 | - | 4.98 | 105,133 |
| Bosnia and Herzegovina Country Quiz | 0 | - | 4.85 | 35,674 |
| Countries Bordering Serbia | 0 | - | 4.96 | 93,254 |
| Most Popular Baby Girls Names in Germany | 0 | - | 4.51 | 39,035 |
| German Inventions | 0 | - | 3.91 | 30,290 |
| Embarrassing Chapters in German History | 0 | - | 3.40 | 12,696 |
| Roman to Greek God | 0 | - | 4.52 | 123,566 |
| History of Ireland | 0 | - | 4.39 | 31,511 |
| Italian History A-Z | 0 | - | 4.16 | 17,963 |
| The Life of Julius Caesar | 0 | - | 4.39 | 39,201 |
| Roman History by Picture | 0 | - | 4.46 | 26,621 |
| Byzantine History | 0 | - | 4.91 | 29,065 |
| Byzantine Emperors | 0 | - | 4.93 | 14,673 |
| History of The Netherlands | 0 | - | 4.46 | 17,580 |
| Denmark Country Quiz | 0 | - | 4.78 | 76,359 |
| Finland Country Quiz | 0 | - | 4.51 | 60,110 |
| Norway Country Quiz | 0 | - | 4.45 | 77,950 |
| Iceland Country Quiz | 0 | - | 4.69 | 43,450 |
| Biggest Spanish Empire Countries | 0 | - | 4.91 | 117,181 |
| Spanish History A-Z | 0 | - | 4.37 | 19,543 |
| Countries Bordering Spain | 0 | - | 4.51 | 69,796 |
| UK Immigration by Country | 0 | - | 4.94 | 141,949 |
| Arthurian Legend | 0 | - | 4.33 | 25,200 |
