| Name the English Monarchs | 0 | - | 4.92 | 498,172 |
| Monarchies of Europe | 0 | - | 4.90 | 97,359 |
| Modern Day Countries of the Spanish Empire on a Map | 0 | - | 4.95 | 85,551 |
| Houses of British Monarchs | 0 | - | 4.53 | 65,313 |
| The Trojan War | 0 | - | 4.83 | 39,451 |
| Greek Mythology General Knowledge #1 | 0 | - | 4.85 | 110,615 |
| Ancient Roman Trivia #1 | 0 | - | 4.85 | 84,076 |
| Roman Emperors | 0 | - | 4.95 | 118,548 |
| European Geography By Letter - P #1 | 0 | - | 4.81 | 96,359 |
| European Geography By Letter - B #2 | 0 | - | 4.83 | 76,298 |
| Countries of Europe in 1815 With a Map | 0 | - | 4.99 | 149,008 |
| Countries of Europe in 1848 | 0 | - | 4.98 | 75,473 |
| Countries of Europe in 1870 with a Map | 0 | - | 4.95 | 63,478 |
| Every Country of Europe Since 1815 With a Map | 0 | - | 4.98 | 70,165 |
| Countries of Europe in 1360 with a Map | 0 | - | 4.99 | 56,063 |
| Kings of France Quiz | 0 | - | 4.20 | 32,568 |
| States of the German Confederation in 1848 | 0 | - | 4.89 | 31,545 |
| History of The Netherlands | 0 | - | 4.46 | 17,320 |
| English Royal Consorts | 0 | - | 4.37 | 37,180 |
| The Reign of Queen Elizabeth I | 0 | - | 4.53 | 31,620 |
| Monarchies of Asia | 0 | - | 4.97 | 70,617 |
| Europe Map Quiz | 0 | - | 5.00 | 4,732,749 |
| Countries Bordering France | 0 | - | 4.83 | 399,552 |
| Countries Bordering Germany | 0 | - | 4.99 | 367,162 |
| Top 10 Coldest European Countries | 0 | - | 4.94 | 192,285 |
| Top 10 Hottest European Countries | 0 | - | 4.89 | 126,148 |
| Biggest Countries in Europe in 1700 | 0 | - | 4.73 | 58,165 |
| Category Elimination - European Geography #1 | 0 | - | 4.98 | 230,649 |
| Category Elimination - European Geography #2 | 0 | - | 4.99 | 165,256 |
| France Cities Map Quiz | 0 | - | 4.96 | 165,267 |
| Departments of France | 0 | - | 4.93 | 52,875 |
| Germany Country Quiz | 0 | - | 4.82 | 156,629 |
| Germany Cities Map Quiz | 0 | - | 4.86 | 125,199 |
| Italy Country Quiz | 0 | - | 4.82 | 122,274 |
| Regions of Italy Map Quiz | 0 | - | 4.96 | 148,447 |
| Italy Cities Map Quiz | 0 | - | 4.97 | 151,132 |
| Countries Surrounding Rome | 0 | - | 4.97 | 49,381 |
| Spain Cities Map Quiz | 0 | - | 4.87 | 96,118 |
| Regions of Spain Map Quiz | 0 | - | 4.95 | 184,703 |
| Modern-Day Countries of the British Empire in 1921 | 0 | - | 4.99 | 116,363 |
| England or Wales? | 0 | - | 4.94 | 45,345 |
| Deadliest U.S. Wars | 0 | - | 4.89 | 189,323 |
| Europe by Borders in 30 Seconds | 0 | - | 4.98 | 425,378 |
| French Geography Quiz #1 | 0 | - | 4.89 | 34,529 |
| Countries Bordering Austria | 0 | - | 4.97 | 117,812 |
| Countries that Visit France the Most | 0 | - | 4.85 | 45,557 |
| Countries Closest to Metropolitan France | 0 | - | 4.89 | 71,827 |
| Countries With the Most German Speakers | 0 | - | 4.89 | 94,429 |
| Ancient Greece A-Z | 0 | - | 4.60 | 22,991 |
| Counties of Ireland | 0 | - | 4.92 | 193,163 |
| Countries Bordering Italy | 0 | - | 4.94 | 100,474 |
| Countries Closest to Italy | 0 | - | 4.97 | 196,376 |
| Netherlands Country Quiz | 0 | - | 4.50 | 80,000 |
| Countries Closest to Spain | 0 | - | 4.96 | 225,375 |
| United Kingdom A-Z | 0 | - | 4.53 | 87,244 |
| Counties of the UK and Ireland | 0 | - | 4.98 | 128,720 |
| World Capitals Closest to London | 0 | - | 4.87 | 109,781 |
| 50 Busiest Air Routes from London | 0 | - | 4.86 | 95,799 |
| Andorra Country Quiz | 0 | - | 4.90 | 31,417 |
| Countries that Beat Germany | 0 | - | 4.95 | 105,426 |
| Ancient Greek Trivia | 0 | - | 4.62 | 66,786 |
| Geography of Ancient Greece | 0 | - | 4.69 | 31,775 |
| Letters of the Greek Alphabet | 0 | - | 4.97 | 642,186 |
| Name that Greek Letter | 0 | - | 4.94 | 321,767 |
| Countries Italy Declared War On | 0 | - | 4.75 | 42,981 |
| Countries that Beat Italy | 0 | - | 4.85 | 53,903 |
| Countries that Beat Portugal | 0 | - | 4.86 | 58,703 |
| Countries that Beat Spain | 0 | - | 4.94 | 62,490 |
| British Monopoly Board | 0 | - | 4.52 | 41,041 |
| The Reign of Henry VIII | 0 | - | 4.25 | 27,618 |
| Medieval English History | 0 | - | 4.53 | 43,331 |
| Elizabeth I... or Elizabeth II? | 0 | - | 4.30 | 24,432 |
| Countries That Use the Euro | 0 | - | 4.96 | 103,095 |
| Europe Cities Map Quiz | 0 | - | 4.99 | 362,421 |
| 10 Easternmost Countries in Europe | 0 | - | 4.89 | 113,656 |
| The Only European Country ... | 0 | - | 4.91 | 213,971 |
| European Countries NOT in NATO | 0 | - | 4.87 | 59,631 |
| History of Russia Quiz | 0 | - | 4.49 | 31,798 |
| Greek Mythology General Knowledge #2 | 0 | - | 4.59 | 72,941 |
| Ancient Greece - Multiple Choice | 0 | - | 4.54 | 41,449 |
| 101 Figures from Greek Mythology | 0 | - | 5.00 | 124,381 |
| History of Italy | 0 | - | 4.55 | 31,828 |
| Ancient Roman Trivia #2 | 0 | - | 4.57 | 38,545 |
| Geography of the Roman Empire | 0 | - | 4.56 | 51,687 |
| Roman Names for Places | 0 | - | 4.62 | 57,894 |
| Geography of the Dutch Empire | 0 | - | 4.62 | 34,491 |
| Countries that Beat the Netherlands | 0 | - | 4.56 | 36,160 |
| Countries of the Spanish Empire | 0 | - | 4.52 | 76,989 |
| Invasions of Great Britain | 0 | - | 4.51 | 59,512 |
| British History Multiple Choice #1 | 0 | - | 4.46 | 54,968 |
| British History Multiple Choice #2 | 0 | - | 4.42 | 37,841 |
| Zone 1 London Underground Stations - With a Map | 0 | - | 4.90 | 51,969 |
| Flags of Europe Quiz | 0 | - | 4.99 | 1,227,543 |
| Countries of Europe - One Minute Sprint | 0 | - | 4.94 | 1,320,301 |
| 10 Biggest European Countries by Area | 0 | - | 4.99 | 191,742 |
| 10 Westernmost Countries in Europe | 0 | - | 4.96 | 150,334 |
| Top 10 Languages Spoken in Europe | 0 | - | 4.96 | 216,445 |
| European Landmarks Map Quiz | 0 | - | 4.97 | 86,501 |
| Countries of Europe with an Empty Map | 0 | - | 5.00 | 307,929 |
| All First-Level Subdivisions of Europe on a Map | 0 | - | 4.98 | 168,050 |
| Countries with Territory in the Balkans | 0 | - | 4.96 | 88,308 |
| Eastern Europe Map Quiz | 0 | - | 4.91 | 127,232 |
| Slavic Countries | 0 | - | 4.96 | 110,896 |
| Olympian Gods Quiz | 0 | - | 4.96 | 496,529 |
| Ancient Greek Words | 0 | - | 4.92 | 110,737 |
| Italian History A-Z | 0 | - | 4.21 | 17,451 |
| Spanish History A-Z | 0 | - | 4.37 | 19,092 |
| Counties of England | 0 | - | 4.97 | 789,562 |
| The Reign of Queen Elizabeth II | 0 | - | 4.35 | 35,687 |
| "Big Five" European Soccer Champions Since 2000 | 0 | - | 4.97 | 350,199 |
| European Geography By Letter - A | 0 | - | 4.56 | 132,426 |
| European Geography By Letter - B #1 | 0 | - | 4.67 | 110,932 |
| European Geography By Letter - C | 0 | - | 4.46 | 111,876 |
| European Geography By Letter - D | 0 | - | 4.50 | 106,738 |
| European Geography By Letter - L | 0 | - | 4.52 | 112,245 |
| European Geography By Letter - M | 0 | - | 4.61 | 128,946 |
| European Geography By Letter - N | 0 | - | 4.44 | 99,695 |
| European Geography By Letter - R | 0 | - | 4.42 | 92,653 |
| European Geography By Letter - V | 0 | - | 4.43 | 92,038 |
| European Geography By Letter - T | 0 | - | 4.41 | 81,334 |
| European Geography By Letter - S #1 | 0 | - | 4.63 | 99,615 |
| European Secessionist Movements on a Map | 0 | - | 4.53 | 34,754 |
| The Reign of Napoleon | 0 | - | 4.54 | 38,715 |
| States of the Holy Roman Empire in 1356 | 0 | - | 4.97 | 72,527 |
| Famous Irish People | 0 | - | 4.05 | 45,860 |
| Roman Numeral Decoding Quiz | 0 | - | 4.94 | 433,699 |
| Two Letter Roman Numerals | 0 | - | 4.97 | 55,643 |
| Provinces of the Netherlands | 0 | - | 4.80 | 40,853 |
| 100 Greatest Britons Quiz | 0 | - | 4.41 | 48,065 |
| UK Cities Map Quiz | 0 | - | 4.95 | 462,268 |
| Members of the British Royal Family | 0 | - | 4.10 | 113,814 |
| Embarrassing Chapters in British History | 0 | - | 4.29 | 32,132 |
| British History A-Z #1 | 0 | - | 4.45 | 45,960 |
| British History Quiz for Dummies | 0 | - | 4.70 | 78,144 |
| History of Scotland | 0 | - | 4.51 | 21,010 |
| London A-Z | 0 | - | 4.10 | 40,642 |
| Champions League Winners | 0 | - | 4.92 | 996,869 |
| U.S. Citizenship Test Questions | 0 | - | 4.83 | 238,390 |
| European Diaspora - Top 11 Countries | 0 | - | 4.90 | 95,069 |
| 10 European Countries with the Most Tourists | 0 | - | 4.98 | 136,446 |
| Three Band Flags of Europe | 0 | - | 4.98 | 191,932 |
| Catholic Countries in Europe | 0 | - | 4.83 | 94,263 |
| Pixelated Europe Map | 0 | - | 4.88 | 121,857 |
| European Countries with One Border | 0 | - | 4.97 | 181,680 |
| European Countries with the Fewest Borders | 0 | - | 4.97 | 178,583 |
| Category Elimination - European Geography #3 | 0 | - | 4.85 | 79,846 |
| Federal Subjects of Russia | 0 | - | 4.94 | 144,109 |
| Countries That Border Russia | 0 | - | 4.98 | 459,031 |
| Countries Formerly in Yugoslavia | 0 | - | 4.95 | 124,239 |
| History of Austria | 0 | - | 4.70 | 17,759 |
| Austria Country Quiz | 0 | - | 4.57 | 59,367 |
| Belgium Country Quiz | 0 | - | 4.70 | 71,273 |
| France Country Quiz | 0 | - | 4.70 | 133,900 |
| Regions of France Map Quiz | 0 | - | 4.97 | 143,251 |
| Geography of the French Empire | 0 | - | 4.48 | 26,941 |
| The French Revolution | 0 | - | 4.46 | 23,790 |
| History of France | 0 | - | 4.59 | 56,115 |
| French History A-Z | 0 | - | 4.17 | 22,098 |
| States of Germany Map Quiz | 0 | - | 4.91 | 131,765 |
| States of Germany | 0 | - | 4.96 | 150,184 |
| Biggest Cities in Germany in 1910 | 0 | - | 4.41 | 23,389 |
| Germany Immigration by Country | 0 | - | 4.84 | 80,064 |
| Greece Country Quiz | 0 | - | 4.74 | 65,781 |
| The Life of Alexander the Great | 0 | - | 4.49 | 18,425 |
| Regions of Italy | 0 | - | 4.92 | 74,780 |
| Seven Hills of Rome | 0 | - | 4.70 | 9,118 |
| Luxembourg Country Quiz | 0 | - | 4.77 | 33,496 |
| Monaco Country Quiz | 0 | - | 4.47 | 41,260 |
| Netherlands Immigration by Country | 0 | - | 4.94 | 43,861 |
| Nordic Cities Map Quiz | 0 | - | 4.74 | 89,781 |
| The Vikings! | 0 | - | 4.46 | 28,250 |
| Sweden Immigration by Country | 0 | - | 4.55 | 55,717 |
| Portugal Country Quiz | 0 | - | 4.69 | 71,373 |
| The Portuguese Empire | 0 | - | 4.54 | 11,995 |
| Spain Country Quiz | 0 | - | 4.45 | 127,664 |
| Regions of Spain Quiz | 0 | - | 4.90 | 112,427 |
| Switzerland Country Quiz | 0 | - | 4.51 | 62,955 |
| Cantons of Switzerland | 0 | - | 4.98 | 50,235 |
| Countries and Territories of the United Kingdom | 0 | - | 4.89 | 93,044 |
| Largest Islands in the British Isles With a Map | 0 | - | 4.52 | 38,570 |
| Wives of King Henry VIII | 0 | - | 4.55 | 53,198 |
| Countries the UK Declared War On | 0 | - | 4.61 | 121,834 |
| Geography of the British Empire | 0 | - | 4.48 | 39,490 |
| The Reign of Queen Victoria | 0 | - | 4.33 | 23,344 |
| 10 Closest Megacities to London | 0 | - | 4.90 | 17,520 |
| Counties of Wales | 0 | - | 4.63 | 38,921 |
| Asian Geography By Letter - B | 0 | - | 4.85 | 66,014 |
| Asian Country Superlatives | 0 | - | 4.84 | 80,445 |
| Battle to Country | 0 | - | 4.91 | 52,561 |
| Countries of the Mongol Empire on a Map | 0 | - | 4.99 | 105,948 |
| Category Elimination - African Geography #1 | 0 | - | 4.90 | 91,138 |
| Top 10 Biggest Economies in the Americas | 0 | - | 4.93 | 91,122 |
| U.S. Cabinet Departments | 0 | - | 4.86 | 72,547 |
| European Geography By Letter - E | 0 | - | 4.23 | 112,240 |
| European Geography By Letter - F | 0 | - | 4.17 | 91,686 |
| European Geography By Letter - H | 0 | - | 4.30 | 94,921 |
| European Geography By Letter - G | 0 | - | 4.25 | 101,302 |
| European Geography By Letter - I | 0 | - | 4.10 | 94,509 |
| European Geography By Letter - K | 0 | - | 4.14 | 69,186 |
| European Geography By Letter - O | 0 | - | 4.28 | 61,941 |
