| Name the English Monarchs | 0 | - | 4.91 | 502,201 |
| Modern Day Countries of the Dutch Empire on a Map | 0 | - | 4.86 | 61,053 |
| Monarchies of Europe | 0 | - | 4.90 | 98,060 |
| Modern Day Countries of the Spanish Empire on a Map | 0 | - | 4.95 | 86,216 |
| The Reign of Queen Elizabeth I | 0 | - | 4.53 | 31,775 |
| Houses of British Monarchs | 0 | - | 4.53 | 65,630 |
| States of the German Confederation in 1848 | 0 | - | 4.89 | 31,954 |
| The Trojan War | 0 | - | 4.83 | 39,691 |
| Greek Mythology General Knowledge #1 | 0 | - | 4.85 | 111,731 |
| Ancient Roman Trivia #1 | 0 | - | 4.85 | 84,485 |
| Roman Emperors | 0 | - | 4.95 | 119,878 |
| European Geography By Letter - B #2 | 0 | - | 4.85 | 78,134 |
| Countries of Europe in 1815 With a Map | 0 | - | 4.99 | 150,090 |
| Countries of Europe in 1848 | 0 | - | 4.99 | 80,711 |
| Countries of Europe in 1870 with a Map | 0 | - | 4.95 | 64,523 |
| Every Country of Europe Since 1815 With a Map | 0 | - | 4.98 | 70,883 |
| Countries of Europe in 1360 with a Map | 0 | - | 4.99 | 56,774 |
| Kings of France Quiz | 0 | - | 4.20 | 32,708 |
| History of The Netherlands | 0 | - | 4.46 | 17,428 |
| English Royal Consorts | 0 | - | 4.37 | 37,340 |
| Monarchies of Asia | 0 | - | 4.97 | 71,046 |
| Europe Map Quiz | 0 | - | 5.00 | 4,759,807 |
| Countries Bordering France | 0 | - | 4.83 | 402,342 |
| Countries Bordering Germany | 0 | - | 4.99 | 369,226 |
| Top 10 Coldest European Countries | 0 | - | 4.94 | 193,042 |
| Top 10 Hottest European Countries | 0 | - | 4.88 | 126,910 |
| Biggest Countries in Europe in 1700 | 0 | - | 4.73 | 58,462 |
| Category Elimination - European Geography #1 | 0 | - | 4.98 | 233,008 |
| Category Elimination - European Geography #2 | 0 | - | 4.99 | 166,954 |
| Andorra Country Quiz | 0 | - | 4.90 | 31,664 |
| France Cities Map Quiz | 0 | - | 4.96 | 166,632 |
| Departments of France | 0 | - | 4.93 | 54,007 |
| Germany Country Quiz | 0 | - | 4.82 | 157,752 |
| Germany Cities Map Quiz | 0 | - | 4.87 | 126,033 |
| Italy Country Quiz | 0 | - | 4.82 | 123,326 |
| Regions of Italy Map Quiz | 0 | - | 4.96 | 149,269 |
| Italy Cities Map Quiz | 0 | - | 4.97 | 151,937 |
| Countries Surrounding Rome | 0 | - | 4.97 | 49,535 |
| Spain Cities Map Quiz | 0 | - | 4.87 | 96,810 |
| Regions of Spain Map Quiz | 0 | - | 4.95 | 185,555 |
| Modern-Day Countries of the British Empire in 1921 | 0 | - | 4.99 | 117,472 |
| England or Wales? | 0 | - | 4.94 | 45,651 |
| Deadliest U.S. Wars | 0 | - | 4.89 | 190,685 |
| Europe by Borders in 30 Seconds | 0 | - | 4.98 | 427,924 |
| French Geography Quiz #1 | 0 | - | 4.89 | 34,749 |
| Countries Bordering Austria | 0 | - | 4.97 | 118,274 |
| Countries that Visit France the Most | 0 | - | 4.85 | 45,841 |
| Countries Closest to Metropolitan France | 0 | - | 4.89 | 72,143 |
| Countries With the Most German Speakers | 0 | - | 4.89 | 96,460 |
| Ancient Greece A-Z | 0 | - | 4.60 | 23,129 |
| Counties of Ireland | 0 | - | 4.92 | 195,040 |
| Countries Bordering Italy | 0 | - | 4.94 | 100,832 |
| Countries Closest to Italy | 0 | - | 4.97 | 197,927 |
| Netherlands Country Quiz | 0 | - | 4.53 | 80,479 |
| Countries Closest to Spain | 0 | - | 4.96 | 226,848 |
| United Kingdom A-Z | 0 | - | 4.51 | 87,646 |
| Counties of the UK and Ireland | 0 | - | 4.98 | 130,523 |
| World Capitals Closest to London | 0 | - | 4.88 | 110,600 |
| 50 Busiest Air Routes from London | 0 | - | 4.87 | 96,779 |
| Countries that Beat Germany | 0 | - | 4.95 | 106,299 |
| Ancient Greek Trivia | 0 | - | 4.62 | 66,970 |
| Geography of Ancient Greece | 0 | - | 4.69 | 31,901 |
| Letters of the Greek Alphabet | 0 | - | 4.97 | 646,870 |
| Name that Greek Letter | 0 | - | 4.93 | 323,306 |
| Countries Italy Declared War On | 0 | - | 4.75 | 43,297 |
| Countries that Beat Italy | 0 | - | 4.85 | 54,422 |
| Countries that Beat Portugal | 0 | - | 4.86 | 59,270 |
| Countries that Beat Spain | 0 | - | 4.94 | 62,886 |
| British Monopoly Board | 0 | - | 4.52 | 41,160 |
| The Reign of Henry VIII | 0 | - | 4.25 | 27,738 |
| Medieval English History | 0 | - | 4.53 | 43,495 |
| Elizabeth I... or Elizabeth II? | 0 | - | 4.30 | 24,497 |
| Countries That Use the Euro | 0 | - | 4.95 | 104,831 |
| Europe Cities Map Quiz | 0 | - | 4.99 | 364,259 |
| 10 Easternmost Countries in Europe | 0 | - | 4.89 | 115,087 |
| The Only European Country ... | 0 | - | 4.91 | 216,382 |
| European Countries NOT in NATO | 0 | - | 4.90 | 60,990 |
| History of Russia Quiz | 0 | - | 4.47 | 31,905 |
| Greek Mythology General Knowledge #2 | 0 | - | 4.59 | 73,596 |
| Ancient Greece - Multiple Choice | 0 | - | 4.54 | 41,643 |
| 101 Figures from Greek Mythology | 0 | - | 4.99 | 125,806 |
| History of Italy | 0 | - | 4.55 | 31,960 |
| Ancient Roman Trivia #2 | 0 | - | 4.57 | 38,723 |
| Geography of the Roman Empire | 0 | - | 4.56 | 51,893 |
| Roman Names for Places | 0 | - | 4.62 | 58,248 |
| Geography of the Dutch Empire | 0 | - | 4.61 | 34,643 |
| Countries that Beat the Netherlands | 0 | - | 4.56 | 36,333 |
| Countries of the Spanish Empire | 0 | - | 4.52 | 77,209 |
| Invasions of Great Britain | 0 | - | 4.51 | 59,838 |
| British History Multiple Choice #1 | 0 | - | 4.46 | 55,126 |
| British History Multiple Choice #2 | 0 | - | 4.42 | 37,939 |
| Zone 1 London Underground Stations - With a Map | 0 | - | 4.90 | 52,328 |
| Flags of Europe Quiz | 0 | - | 4.99 | 1,242,477 |
| Countries of Europe - One Minute Sprint | 0 | - | 4.94 | 1,327,476 |
| 10 Biggest European Countries by Area | 0 | - | 4.99 | 192,579 |
| 10 Westernmost Countries in Europe | 0 | - | 4.96 | 151,117 |
| Top 10 Languages Spoken in Europe | 0 | - | 4.96 | 218,477 |
| European Landmarks Map Quiz | 0 | - | 4.97 | 87,075 |
| Countries of Europe with an Empty Map | 0 | - | 5.00 | 310,264 |
| All First-Level Subdivisions of Europe on a Map | 0 | - | 4.99 | 171,310 |
| Countries with Territory in the Balkans | 0 | - | 4.96 | 89,177 |
| Eastern Europe Map Quiz | 0 | - | 4.91 | 128,013 |
| Slavic Countries | 0 | - | 4.96 | 111,588 |
| Olympian Gods Quiz | 0 | - | 4.96 | 500,434 |
| Ancient Greek Words | 0 | - | 4.93 | 111,502 |
| Italian History A-Z | 0 | - | 4.21 | 17,696 |
| Spanish History A-Z | 0 | - | 4.37 | 19,284 |
| Counties of England | 0 | - | 4.97 | 795,937 |
| The Reign of Queen Elizabeth II | 0 | - | 4.36 | 35,827 |
| "Big Five" European Soccer Champions Since 2000 | 0 | - | 4.97 | 355,384 |
| European Geography By Letter - A | 0 | - | 4.52 | 145,763 |
| European Geography By Letter - B #1 | 0 | - | 4.68 | 113,069 |
| European Geography By Letter - C | 0 | - | 4.46 | 113,488 |
| European Geography By Letter - D | 0 | - | 4.50 | 108,206 |
| European Geography By Letter - L | 0 | - | 4.52 | 113,258 |
| European Geography By Letter - M | 0 | - | 4.67 | 130,328 |
| European Geography By Letter - P #1 | 0 | - | 4.80 | 97,334 |
| European Geography By Letter - N | 0 | - | 4.44 | 100,653 |
| European Geography By Letter - R | 0 | - | 4.42 | 93,549 |
| European Geography By Letter - V | 0 | - | 4.43 | 92,876 |
| European Geography By Letter - T | 0 | - | 4.41 | 82,253 |
| European Geography By Letter - S #1 | 0 | - | 4.63 | 100,450 |
| European Secessionist Movements on a Map | 0 | - | 4.53 | 34,960 |
| Russian History A-Z | 0 | - | 4.38 | 31,665 |
| The Reign of Napoleon | 0 | - | 4.54 | 38,937 |
| States of the Holy Roman Empire in 1356 | 0 | - | 4.97 | 73,988 |
| Famous Irish People | 0 | - | 4.05 | 45,990 |
| Roman Numeral Decoding Quiz | 0 | - | 4.94 | 436,791 |
| Two Letter Roman Numerals | 0 | - | 4.97 | 56,085 |
| Provinces of the Netherlands | 0 | - | 4.80 | 41,307 |
| 100 Greatest Britons Quiz | 0 | - | 4.41 | 48,250 |
| UK Cities Map Quiz | 0 | - | 4.96 | 464,302 |
| Members of the British Royal Family | 0 | - | 4.10 | 114,045 |
| British Geography A-Z | 0 | - | 4.42 | 19,508 |
| Embarrassing Chapters in British History | 0 | - | 4.29 | 32,253 |
| British History A-Z #1 | 0 | - | 4.45 | 46,455 |
| British History Quiz for Dummies | 0 | - | 4.70 | 78,544 |
| History of Scotland | 0 | - | 4.51 | 21,086 |
| London A-Z | 0 | - | 4.10 | 40,757 |
| Champions League Winners | 0 | - | 4.92 | 1,005,717 |
| U.S. Citizenship Test Questions | 0 | - | 4.83 | 239,345 |
| European Diaspora - Top 11 Countries | 0 | - | 4.90 | 95,771 |
| 10 European Countries with the Most Tourists | 0 | - | 4.98 | 137,413 |
| Three Band Flags of Europe | 0 | - | 4.98 | 193,159 |
| Catholic Countries in Europe | 0 | - | 4.83 | 95,027 |
| Pixelated Europe Map | 0 | - | 4.88 | 122,663 |
| European Countries with One Border | 0 | - | 4.97 | 182,673 |
| European Countries with the Fewest Borders | 0 | - | 4.97 | 179,483 |
| Category Elimination - European Geography #3 | 0 | - | 4.86 | 80,882 |
| Federal Subjects of Russia | 0 | - | 4.95 | 146,885 |
| Countries That Border Russia | 0 | - | 4.98 | 461,503 |
| Countries Formerly in Yugoslavia | 0 | - | 4.95 | 124,833 |
| History of Austria | 0 | - | 4.70 | 17,854 |
| Austria Country Quiz | 0 | - | 4.57 | 59,709 |
| Belgium Country Quiz | 0 | - | 4.73 | 71,758 |
| France Country Quiz | 0 | - | 4.70 | 134,908 |
| Regions of France Map Quiz | 0 | - | 4.97 | 144,297 |
| Geography of the French Empire | 0 | - | 4.45 | 27,046 |
| The French Revolution | 0 | - | 4.46 | 23,924 |
| History of France | 0 | - | 4.59 | 56,931 |
| French History A-Z | 0 | - | 4.27 | 24,610 |
| States of Germany Map Quiz | 0 | - | 4.91 | 132,712 |
| States of Germany | 0 | - | 4.96 | 152,314 |
| Germany Immigration by Country | 0 | - | 4.85 | 80,974 |
| Greece Country Quiz | 0 | - | 4.74 | 66,221 |
| The Life of Alexander the Great | 0 | - | 4.51 | 18,492 |
| Regions of Italy | 0 | - | 4.92 | 75,767 |
| Seven Hills of Rome | 0 | - | 4.70 | 9,175 |
| Luxembourg Country Quiz | 0 | - | 4.78 | 33,731 |
| Monaco Country Quiz | 0 | - | 4.47 | 41,479 |
| Netherlands Immigration by Country | 0 | - | 4.93 | 52,069 |
| Nordic Cities Map Quiz | 0 | - | 4.77 | 90,431 |
| The Vikings! | 0 | - | 4.46 | 28,337 |
| Sweden Immigration by Country | 0 | - | 4.55 | 56,098 |
| Portugal Country Quiz | 0 | - | 4.69 | 71,842 |
| The Portuguese Empire | 0 | - | 4.58 | 12,060 |
| Spain Country Quiz | 0 | - | 4.45 | 128,455 |
| Regions of Spain Quiz | 0 | - | 4.90 | 113,833 |
| Switzerland Country Quiz | 0 | - | 4.51 | 63,328 |
| Cantons of Switzerland | 0 | - | 4.98 | 51,123 |
| Countries and Territories of the United Kingdom | 0 | - | 4.89 | 93,941 |
| Largest Islands in the British Isles With a Map | 0 | - | 4.52 | 38,706 |
| Wives of King Henry VIII | 0 | - | 4.55 | 53,338 |
| Countries the UK Declared War On | 0 | - | 4.61 | 122,413 |
| Geography of the British Empire | 0 | - | 4.48 | 39,655 |
| The Reign of Queen Victoria | 0 | - | 4.33 | 23,434 |
| 10 Closest Megacities to London | 0 | - | 4.90 | 17,685 |
| Counties of Wales | 0 | - | 4.63 | 39,249 |
| Asian Geography By Letter - B | 0 | - | 4.85 | 66,441 |
| Asian Country Superlatives | 0 | - | 4.84 | 80,834 |
| Battle to Country | 0 | - | 4.91 | 53,254 |
| Countries of the Mongol Empire on a Map | 0 | - | 4.99 | 106,773 |
| Category Elimination - African Geography #1 | 0 | - | 4.90 | 92,258 |
| Top 10 Biggest Economies in the Americas | 0 | - | 4.94 | 92,099 |
| U.S. Cabinet Departments | 0 | - | 4.86 | 72,842 |
| European Geography By Letter - E | 0 | - | 4.23 | 113,359 |
| European Geography By Letter - F | 0 | - | 4.17 | 92,676 |
| European Geography By Letter - H | 0 | - | 4.30 | 95,844 |
| European Geography By Letter - G | 0 | - | 4.27 | 102,495 |
| European Geography By Letter - I | 0 | - | 4.10 | 95,331 |
