| Name the English Monarchs | 0 | - | 4.92 | 497,806 |
| Monarchies of Europe | 0 | - | 4.90 | 97,299 |
| Modern Day Countries of the Spanish Empire on a Map | 0 | - | 4.95 | 85,480 |
| The Trojan War | 0 | - | 4.83 | 39,424 |
| Greek Mythology General Knowledge #1 | 0 | - | 4.85 | 110,514 |
| Ancient Roman Trivia #1 | 0 | - | 4.85 | 84,038 |
| Roman Emperors | 0 | - | 4.95 | 118,445 |
| Countries that Beat Portugal | 0 | - | 4.86 | 58,664 |
| European Geography By Letter - P #1 | 0 | - | 4.81 | 96,319 |
| European Geography By Letter - B #2 | 0 | - | 4.83 | 76,226 |
| Countries of Europe in 1815 With a Map | 0 | - | 4.99 | 148,921 |
| Countries of Europe in 1848 | 0 | - | 4.98 | 75,400 |
| Countries of Europe in 1870 with a Map | 0 | - | 4.95 | 63,379 |
| Every Country of Europe Since 1815 With a Map | 0 | - | 4.98 | 70,095 |
| Countries of Europe in 1360 with a Map | 0 | - | 4.99 | 56,003 |
| Kings of France Quiz | 0 | - | 4.20 | 32,550 |
| States of the German Confederation in 1848 | 0 | - | 4.89 | 31,517 |
| Monarchies of Asia | 0 | - | 4.97 | 70,591 |
| Europe Map Quiz | 0 | - | 5.00 | 4,730,659 |
| Countries Bordering France | 0 | - | 4.83 | 398,841 |
| Countries Bordering Germany | 0 | - | 4.99 | 366,998 |
| Houses of British Monarchs | 0 | - | 4.53 | 65,289 |
| Top 10 Coldest European Countries | 0 | - | 4.94 | 192,227 |
| Top 10 Hottest European Countries | 0 | - | 4.89 | 126,107 |
| Biggest Countries in Europe in 1700 | 0 | - | 4.73 | 58,134 |
| Category Elimination - European Geography #1 | 0 | - | 4.98 | 230,482 |
| Category Elimination - European Geography #2 | 0 | - | 4.99 | 165,134 |
| France Cities Map Quiz | 0 | - | 4.96 | 165,171 |
| Departments of France | 0 | - | 4.93 | 52,792 |
| Germany Country Quiz | 0 | - | 4.82 | 156,515 |
| Germany Cities Map Quiz | 0 | - | 4.86 | 125,131 |
| Italy Country Quiz | 0 | - | 4.82 | 122,174 |
| Regions of Italy Map Quiz | 0 | - | 4.96 | 148,339 |
| Italy Cities Map Quiz | 0 | - | 4.97 | 151,063 |
| Countries Surrounding Rome | 0 | - | 4.97 | 49,359 |
| Spain Cities Map Quiz | 0 | - | 4.87 | 95,946 |
| Regions of Spain Map Quiz | 0 | - | 4.95 | 184,624 |
| Modern-Day Countries of the British Empire in 1921 | 0 | - | 4.99 | 116,244 |
| England or Wales? | 0 | - | 4.94 | 45,306 |
| Deadliest U.S. Wars | 0 | - | 4.89 | 189,224 |
| Europe by Borders in 30 Seconds | 0 | - | 4.98 | 425,142 |
| French Geography Quiz #1 | 0 | - | 4.89 | 34,509 |
| Countries Bordering Austria | 0 | - | 4.97 | 117,767 |
| Countries that Visit France the Most | 0 | - | 4.85 | 45,520 |
| Countries Closest to Metropolitan France | 0 | - | 4.89 | 71,792 |
| Countries With the Most German Speakers | 0 | - | 4.89 | 94,273 |
| Ancient Greece A-Z | 0 | - | 4.60 | 22,983 |
| Counties of Ireland | 0 | - | 4.92 | 193,033 |
| Countries Bordering Italy | 0 | - | 4.94 | 100,438 |
| Countries Closest to Italy | 0 | - | 4.97 | 196,291 |
| Portugal Country Quiz | 0 | - | 4.69 | 71,327 |
| Countries Closest to Spain | 0 | - | 4.96 | 225,277 |
| United Kingdom A-Z | 0 | - | 4.53 | 87,210 |
| Counties of the UK and Ireland | 0 | - | 4.98 | 128,578 |
| World Capitals Closest to London | 0 | - | 4.87 | 109,710 |
| 50 Busiest Air Routes from London | 0 | - | 4.86 | 95,753 |
| Andorra Country Quiz | 0 | - | 4.90 | 31,384 |
| Countries that Beat Germany | 0 | - | 4.95 | 105,355 |
| Ancient Greek Trivia | 0 | - | 4.62 | 66,766 |
| Geography of Ancient Greece | 0 | - | 4.69 | 31,766 |
| Letters of the Greek Alphabet | 0 | - | 4.97 | 641,787 |
| Name that Greek Letter | 0 | - | 4.94 | 321,631 |
| Countries Italy Declared War On | 0 | - | 4.75 | 42,941 |
| Countries that Beat Italy | 0 | - | 4.85 | 53,867 |
| Countries that Beat Spain | 0 | - | 4.94 | 62,453 |
| British Monopoly Board | 0 | - | 4.52 | 41,028 |
| English Royal Consorts | 0 | - | 4.37 | 37,157 |
| The Reign of Queen Elizabeth I | 0 | - | 4.53 | 31,605 |
| Medieval English History | 0 | - | 4.53 | 43,314 |
| Countries That Use the Euro | 0 | - | 4.96 | 102,941 |
| Europe Cities Map Quiz | 0 | - | 4.99 | 362,280 |
| 10 Easternmost Countries in Europe | 0 | - | 4.89 | 113,514 |
| The Only European Country ... | 0 | - | 4.91 | 213,775 |
| European Countries NOT in NATO | 0 | - | 4.87 | 59,500 |
| History of Russia Quiz | 0 | - | 4.49 | 31,788 |
| Greek Mythology General Knowledge #2 | 0 | - | 4.59 | 72,885 |
| Ancient Greece - Multiple Choice | 0 | - | 4.54 | 41,426 |
| 101 Figures from Greek Mythology | 0 | - | 5.00 | 124,259 |
| History of Italy | 0 | - | 4.55 | 31,813 |
| Ancient Roman Trivia #2 | 0 | - | 4.57 | 38,529 |
| Geography of the Roman Empire | 0 | - | 4.56 | 51,660 |
| Roman Names for Places | 0 | - | 4.62 | 57,865 |
| Geography of the Dutch Empire | 0 | - | 4.62 | 34,478 |
| History of The Netherlands | 0 | - | 4.46 | 17,308 |
| Countries of the Spanish Empire | 0 | - | 4.52 | 76,979 |
| Invasions of Great Britain | 0 | - | 4.51 | 59,381 |
| British History Multiple Choice #1 | 0 | - | 4.46 | 54,951 |
| British History Multiple Choice #2 | 0 | - | 4.42 | 37,830 |
| Zone 1 London Underground Stations - With a Map | 0 | - | 4.90 | 51,938 |
| Flags of Europe Quiz | 0 | - | 4.99 | 1,226,285 |
| Countries of Europe - One Minute Sprint | 0 | - | 4.94 | 1,319,618 |
| 10 Biggest European Countries by Area | 0 | - | 4.99 | 191,701 |
| 10 Westernmost Countries in Europe | 0 | - | 4.96 | 150,268 |
| Top 10 Languages Spoken in Europe | 0 | - | 4.96 | 216,276 |
| European Landmarks Map Quiz | 0 | - | 4.97 | 86,455 |
| Countries of Europe with an Empty Map | 0 | - | 5.00 | 307,793 |
| All First-Level Subdivisions of Europe on a Map | 0 | - | 4.98 | 167,839 |
| Countries with Territory in the Balkans | 0 | - | 4.96 | 88,234 |
| Eastern Europe Map Quiz | 0 | - | 4.91 | 127,178 |
| Slavic Countries | 0 | - | 4.96 | 110,839 |
| Olympian Gods Quiz | 0 | - | 4.96 | 495,974 |
| Ancient Greek Words | 0 | - | 4.92 | 110,681 |
| Italian History A-Z | 0 | - | 4.21 | 17,381 |
| Spanish History A-Z | 0 | - | 4.36 | 19,029 |
| Counties of England | 0 | - | 4.97 | 789,061 |
| "Big Five" European Soccer Champions Since 2000 | 0 | - | 4.97 | 349,810 |
| European Geography By Letter - A | 0 | - | 4.56 | 132,383 |
| European Geography By Letter - B #1 | 0 | - | 4.68 | 110,886 |
| European Geography By Letter - C | 0 | - | 4.46 | 111,822 |
| European Geography By Letter - D | 0 | - | 4.50 | 106,692 |
| European Geography By Letter - L | 0 | - | 4.52 | 112,206 |
| European Geography By Letter - M | 0 | - | 4.61 | 128,868 |
| European Geography By Letter - N | 0 | - | 4.44 | 99,659 |
| European Geography By Letter - R | 0 | - | 4.42 | 92,618 |
| European Geography By Letter - V | 0 | - | 4.43 | 92,013 |
| European Geography By Letter - T | 0 | - | 4.41 | 81,293 |
| European Geography By Letter - S #1 | 0 | - | 4.63 | 99,585 |
| European Secessionist Movements on a Map | 0 | - | 4.53 | 34,738 |
| The Reign of Napoleon | 0 | - | 4.54 | 38,672 |
| States of the Holy Roman Empire in 1356 | 0 | - | 4.97 | 72,444 |
| Famous Irish People | 0 | - | 4.05 | 45,854 |
| Roman Numeral Decoding Quiz | 0 | - | 4.94 | 433,467 |
| Two Letter Roman Numerals | 0 | - | 4.97 | 55,614 |
| 100 Greatest Britons Quiz | 0 | - | 4.41 | 48,043 |
| UK Cities Map Quiz | 0 | - | 4.95 | 462,099 |
| Embarrassing Chapters in British History | 0 | - | 4.29 | 32,113 |
| The Reign of Henry VIII | 0 | - | 4.25 | 27,605 |
| British History A-Z #1 | 0 | - | 4.45 | 45,800 |
| British History Quiz for Dummies | 0 | - | 4.70 | 78,097 |
| Elizabeth I... or Elizabeth II? | 0 | - | 4.30 | 24,429 |
| History of Scotland | 0 | - | 4.51 | 20,999 |
| London A-Z | 0 | - | 4.10 | 40,635 |
| Champions League Winners | 0 | - | 4.92 | 996,167 |
| U.S. Citizenship Test Questions | 0 | - | 4.83 | 238,304 |
| European Diaspora - Top 11 Countries | 0 | - | 4.90 | 95,030 |
| 10 European Countries with the Most Tourists | 0 | - | 4.98 | 136,358 |
| Three Band Flags of Europe | 0 | - | 4.98 | 191,830 |
| Catholic Countries in Europe | 0 | - | 4.83 | 94,201 |
| Pixelated Europe Map | 0 | - | 4.88 | 121,784 |
| European Countries with One Border | 0 | - | 4.97 | 181,597 |
| European Countries with the Fewest Borders | 0 | - | 4.97 | 178,509 |
| Category Elimination - European Geography #3 | 0 | - | 4.85 | 79,762 |
| Federal Subjects of Russia | 0 | - | 4.94 | 143,940 |
| Countries That Border Russia | 0 | - | 4.98 | 458,861 |
| Countries Formerly in Yugoslavia | 0 | - | 4.95 | 124,179 |
| History of Austria | 0 | - | 4.70 | 17,744 |
| Austria Country Quiz | 0 | - | 4.57 | 59,332 |
| Belgium Country Quiz | 0 | - | 4.70 | 71,222 |
| France Country Quiz | 0 | - | 4.70 | 133,812 |
| Regions of France Map Quiz | 0 | - | 4.97 | 143,102 |
| Geography of the French Empire | 0 | - | 4.48 | 26,925 |
| The French Revolution | 0 | - | 4.46 | 23,780 |
| History of France | 0 | - | 4.59 | 56,015 |
| French History A-Z | 0 | - | 4.17 | 18,652 |
| States of Germany Map Quiz | 0 | - | 4.91 | 131,671 |
| States of Germany | 0 | - | 4.96 | 150,011 |
| Biggest Cities in Germany in 1910 | 0 | - | 4.41 | 23,382 |
| Germany Immigration by Country | 0 | - | 4.84 | 80,000 |
| Greece Country Quiz | 0 | - | 4.74 | 65,748 |
| The Life of Alexander the Great | 0 | - | 4.49 | 18,421 |
| Regions of Italy | 0 | - | 4.92 | 74,688 |
| Seven Hills of Rome | 0 | - | 4.70 | 9,117 |
| Luxembourg Country Quiz | 0 | - | 4.77 | 33,477 |
| Monaco Country Quiz | 0 | - | 4.47 | 41,232 |
| Netherlands Country Quiz | 0 | - | 4.50 | 79,953 |
| Netherlands Immigration by Country | 0 | - | 4.94 | 43,795 |
| Nordic Cities Map Quiz | 0 | - | 4.74 | 89,744 |
| The Vikings! | 0 | - | 4.45 | 28,244 |
| Sweden Immigration by Country | 0 | - | 4.55 | 55,689 |
| The Portuguese Empire | 0 | - | 4.54 | 11,989 |
| Spain Country Quiz | 0 | - | 4.45 | 127,584 |
| Regions of Spain Quiz | 0 | - | 4.90 | 112,310 |
| Switzerland Country Quiz | 0 | - | 4.51 | 62,934 |
| Cantons of Switzerland | 0 | - | 4.98 | 50,137 |
| Countries and Territories of the United Kingdom | 0 | - | 4.89 | 92,900 |
| Largest Islands in the British Isles With a Map | 0 | - | 4.52 | 38,559 |
| The British Royal Family - Modern Times | 0 | - | 4.16 | 21,460 |
| English Monarchs in Order by First Letter | 0 | - | 4.38 | 31,323 |
| Wives of King Henry VIII | 0 | - | 4.55 | 53,170 |
| Countries the UK Declared War On | 0 | - | 4.61 | 121,762 |
| Geography of the British Empire | 0 | - | 4.48 | 39,469 |
| 10 Closest Megacities to London | 0 | - | 4.90 | 17,403 |
| Counties of Wales | 0 | - | 4.63 | 38,893 |
| Asian Geography By Letter - B | 0 | - | 4.85 | 65,989 |
| Asian Country Superlatives | 0 | - | 4.84 | 80,429 |
| Battle to Country | 0 | - | 4.91 | 52,505 |
| Countries of the Mongol Empire on a Map | 0 | - | 4.99 | 105,864 |
| Category Elimination - African Geography #1 | 0 | - | 4.90 | 91,085 |
| Top 10 Biggest Economies in the Americas | 0 | - | 4.94 | 91,068 |
| U.S. Cabinet Departments | 0 | - | 4.86 | 72,522 |
| European Geography By Letter - E | 0 | - | 4.23 | 112,201 |
| European Geography By Letter - F | 0 | - | 4.17 | 91,519 |
| European Geography By Letter - H | 0 | - | 4.30 | 94,886 |
| European Geography By Letter - G | 0 | - | 4.25 | 101,261 |
| European Geography By Letter - I | 0 | - | 4.10 | 94,475 |
| European Geography By Letter - K | 0 | - | 4.14 | 69,154 |
| European Geography By Letter - O | 0 | - | 4.28 | 61,911 |
| European Geography by Letter - W | 0 | - | 4.20 | 82,289 |
| European Geography By Letter - S #2 | 0 | - | 4.19 | 50,502 |
| European Geography A-Z | 0 | - | 4.28 | 48,992 |
