| Name the English Monarchs | 0 | - | 4.92 | 498,118 |
| Monarchies of Europe | 0 | - | 4.90 | 97,353 |
| Modern Day Countries of the Spanish Empire on a Map | 0 | - | 4.95 | 85,543 |
| Houses of British Monarchs | 0 | - | 4.53 | 65,310 |
| The Trojan War | 0 | - | 4.83 | 39,447 |
| Greek Mythology General Knowledge #1 | 0 | - | 4.85 | 110,601 |
| Ancient Roman Trivia #1 | 0 | - | 4.85 | 84,068 |
| Roman Emperors | 0 | - | 4.95 | 118,532 |
| European Geography By Letter - P #1 | 0 | - | 4.81 | 96,354 |
| European Geography By Letter - B #2 | 0 | - | 4.83 | 76,294 |
| Countries of Europe in 1815 With a Map | 0 | - | 4.99 | 149,001 |
| Countries of Europe in 1848 | 0 | - | 4.98 | 75,460 |
| Countries of Europe in 1870 with a Map | 0 | - | 4.95 | 63,465 |
| Every Country of Europe Since 1815 With a Map | 0 | - | 4.98 | 70,154 |
| Countries of Europe in 1360 with a Map | 0 | - | 4.99 | 56,049 |
| Kings of France Quiz | 0 | - | 4.20 | 32,562 |
| States of the German Confederation in 1848 | 0 | - | 4.89 | 31,541 |
| History of The Netherlands | 0 | - | 4.46 | 17,319 |
| English Royal Consorts | 0 | - | 4.37 | 37,176 |
| The Reign of Queen Elizabeth I | 0 | - | 4.53 | 31,620 |
| Monarchies of Asia | 0 | - | 4.97 | 70,615 |
| Europe Map Quiz | 0 | - | 5.00 | 4,732,522 |
| Countries Bordering France | 0 | - | 4.83 | 399,480 |
| Countries Bordering Germany | 0 | - | 4.99 | 367,147 |
| Top 10 Coldest European Countries | 0 | - | 4.94 | 192,278 |
| Top 10 Hottest European Countries | 0 | - | 4.89 | 126,144 |
| Biggest Countries in Europe in 1700 | 0 | - | 4.73 | 58,162 |
| Category Elimination - European Geography #1 | 0 | - | 4.98 | 230,639 |
| Category Elimination - European Geography #2 | 0 | - | 4.99 | 165,243 |
| France Cities Map Quiz | 0 | - | 4.96 | 165,260 |
| Departments of France | 0 | - | 4.93 | 52,864 |
| Germany Country Quiz | 0 | - | 4.82 | 156,614 |
| Germany Cities Map Quiz | 0 | - | 4.86 | 125,192 |
| Italy Country Quiz | 0 | - | 4.82 | 122,263 |
| Regions of Italy Map Quiz | 0 | - | 4.96 | 148,442 |
| Italy Cities Map Quiz | 0 | - | 4.97 | 151,120 |
| Countries Surrounding Rome | 0 | - | 4.97 | 49,378 |
| Spain Cities Map Quiz | 0 | - | 4.87 | 96,112 |
| Regions of Spain Map Quiz | 0 | - | 4.95 | 184,699 |
| Modern-Day Countries of the British Empire in 1921 | 0 | - | 4.99 | 116,349 |
| England or Wales? | 0 | - | 4.94 | 45,339 |
| Deadliest U.S. Wars | 0 | - | 4.89 | 189,319 |
| Europe by Borders in 30 Seconds | 0 | - | 4.98 | 425,333 |
| French Geography Quiz #1 | 0 | - | 4.89 | 34,527 |
| Countries Bordering Austria | 0 | - | 4.97 | 117,808 |
| Countries that Visit France the Most | 0 | - | 4.85 | 45,552 |
| Countries Closest to Metropolitan France | 0 | - | 4.89 | 71,824 |
| Countries With the Most German Speakers | 0 | - | 4.89 | 94,411 |
| Ancient Greece A-Z | 0 | - | 4.60 | 22,988 |
| Counties of Ireland | 0 | - | 4.92 | 193,151 |
| Countries Bordering Italy | 0 | - | 4.94 | 100,473 |
| Countries Closest to Italy | 0 | - | 4.97 | 196,371 |
| Netherlands Country Quiz | 0 | - | 4.50 | 79,995 |
| Countries Closest to Spain | 0 | - | 4.96 | 225,364 |
| United Kingdom A-Z | 0 | - | 4.53 | 87,240 |
| Counties of the UK and Ireland | 0 | - | 4.98 | 128,699 |
| World Capitals Closest to London | 0 | - | 4.87 | 109,777 |
| 50 Busiest Air Routes from London | 0 | - | 4.86 | 95,792 |
| Andorra Country Quiz | 0 | - | 4.90 | 31,415 |
| Countries that Beat Germany | 0 | - | 4.95 | 105,419 |
| Ancient Greek Trivia | 0 | - | 4.62 | 66,783 |
| Geography of Ancient Greece | 0 | - | 4.69 | 31,774 |
| Letters of the Greek Alphabet | 0 | - | 4.97 | 642,121 |
| Name that Greek Letter | 0 | - | 4.94 | 321,749 |
| Countries Italy Declared War On | 0 | - | 4.75 | 42,978 |
| Countries that Beat Italy | 0 | - | 4.85 | 53,896 |
| Countries that Beat Portugal | 0 | - | 4.86 | 58,700 |
| Countries that Beat Spain | 0 | - | 4.94 | 62,485 |
| British Monopoly Board | 0 | - | 4.52 | 41,041 |
| The Reign of Henry VIII | 0 | - | 4.25 | 27,616 |
| Medieval English History | 0 | - | 4.53 | 43,328 |
| Elizabeth I... or Elizabeth II? | 0 | - | 4.30 | 24,431 |
| Countries That Use the Euro | 0 | - | 4.96 | 103,077 |
| Europe Cities Map Quiz | 0 | - | 4.99 | 362,399 |
| 10 Easternmost Countries in Europe | 0 | - | 4.89 | 113,639 |
| The Only European Country ... | 0 | - | 4.91 | 213,953 |
| European Countries NOT in NATO | 0 | - | 4.87 | 59,619 |
| History of Russia Quiz | 0 | - | 4.49 | 31,798 |
| Greek Mythology General Knowledge #2 | 0 | - | 4.59 | 72,937 |
| Ancient Greece - Multiple Choice | 0 | - | 4.54 | 41,445 |
| 101 Figures from Greek Mythology | 0 | - | 5.00 | 124,364 |
| History of Italy | 0 | - | 4.55 | 31,826 |
| Ancient Roman Trivia #2 | 0 | - | 4.57 | 38,545 |
| Geography of the Roman Empire | 0 | - | 4.56 | 51,683 |
| Roman Names for Places | 0 | - | 4.62 | 57,891 |
| Geography of the Dutch Empire | 0 | - | 4.62 | 34,491 |
| Countries that Beat the Netherlands | 0 | - | 4.56 | 36,158 |
| Countries of the Spanish Empire | 0 | - | 4.52 | 76,989 |
| Invasions of Great Britain | 0 | - | 4.51 | 59,489 |
| British History Multiple Choice #1 | 0 | - | 4.46 | 54,967 |
| British History Multiple Choice #2 | 0 | - | 4.42 | 37,841 |
| Zone 1 London Underground Stations - With a Map | 0 | - | 4.90 | 51,966 |
| Flags of Europe Quiz | 0 | - | 4.99 | 1,227,387 |
| Countries of Europe - One Minute Sprint | 0 | - | 4.94 | 1,320,147 |
| 10 Biggest European Countries by Area | 0 | - | 4.99 | 191,735 |
| 10 Westernmost Countries in Europe | 0 | - | 4.96 | 150,327 |
| Top 10 Languages Spoken in Europe | 0 | - | 4.96 | 216,428 |
| European Landmarks Map Quiz | 0 | - | 4.97 | 86,496 |
| Countries of Europe with an Empty Map | 0 | - | 5.00 | 307,914 |
| All First-Level Subdivisions of Europe on a Map | 0 | - | 4.98 | 168,023 |
| Countries with Territory in the Balkans | 0 | - | 4.96 | 88,299 |
| Eastern Europe Map Quiz | 0 | - | 4.91 | 127,228 |
| Slavic Countries | 0 | - | 4.96 | 110,888 |
| Olympian Gods Quiz | 0 | - | 4.96 | 496,457 |
| Ancient Greek Words | 0 | - | 4.92 | 110,729 |
| Italian History A-Z | 0 | - | 4.21 | 17,437 |
| Spanish History A-Z | 0 | - | 4.37 | 19,083 |
| Counties of England | 0 | - | 4.97 | 789,495 |
| The Reign of Queen Elizabeth II | 0 | - | 4.35 | 35,683 |
| "Big Five" European Soccer Champions Since 2000 | 0 | - | 4.97 | 350,155 |
| European Geography By Letter - A | 0 | - | 4.56 | 132,424 |
| European Geography By Letter - B #1 | 0 | - | 4.67 | 110,927 |
| European Geography By Letter - C | 0 | - | 4.46 | 111,875 |
| European Geography By Letter - D | 0 | - | 4.50 | 106,736 |
| European Geography By Letter - L | 0 | - | 4.52 | 112,241 |
| European Geography By Letter - M | 0 | - | 4.61 | 128,938 |
| European Geography By Letter - N | 0 | - | 4.44 | 99,693 |
| European Geography By Letter - R | 0 | - | 4.42 | 92,649 |
| European Geography By Letter - V | 0 | - | 4.43 | 92,033 |
| European Geography By Letter - T | 0 | - | 4.41 | 81,328 |
| European Geography By Letter - S #1 | 0 | - | 4.63 | 99,612 |
| European Secessionist Movements on a Map | 0 | - | 4.53 | 34,752 |
| The Reign of Napoleon | 0 | - | 4.54 | 38,707 |
| States of the Holy Roman Empire in 1356 | 0 | - | 4.97 | 72,511 |
| Famous Irish People | 0 | - | 4.05 | 45,859 |
| Roman Numeral Decoding Quiz | 0 | - | 4.94 | 433,681 |
| Two Letter Roman Numerals | 0 | - | 4.97 | 55,639 |
| Provinces of the Netherlands | 0 | - | 4.80 | 40,850 |
| 100 Greatest Britons Quiz | 0 | - | 4.41 | 48,062 |
| UK Cities Map Quiz | 0 | - | 4.95 | 462,253 |
| Members of the British Royal Family | 0 | - | 4.10 | 113,811 |
| Embarrassing Chapters in British History | 0 | - | 4.29 | 32,129 |
| British History A-Z #1 | 0 | - | 4.45 | 45,934 |
| British History Quiz for Dummies | 0 | - | 4.70 | 78,135 |
| History of Scotland | 0 | - | 4.51 | 21,007 |
| London A-Z | 0 | - | 4.10 | 40,642 |
| Champions League Winners | 0 | - | 4.92 | 996,789 |
| U.S. Citizenship Test Questions | 0 | - | 4.83 | 238,378 |
| European Diaspora - Top 11 Countries | 0 | - | 4.90 | 95,063 |
| 10 European Countries with the Most Tourists | 0 | - | 4.98 | 136,433 |
| Three Band Flags of Europe | 0 | - | 4.98 | 191,921 |
| Catholic Countries in Europe | 0 | - | 4.83 | 94,255 |
| Pixelated Europe Map | 0 | - | 4.88 | 121,853 |
| European Countries with One Border | 0 | - | 4.97 | 181,674 |
| European Countries with the Fewest Borders | 0 | - | 4.97 | 178,574 |
| Category Elimination - European Geography #3 | 0 | - | 4.85 | 79,839 |
| Federal Subjects of Russia | 0 | - | 4.94 | 144,088 |
| Countries That Border Russia | 0 | - | 4.98 | 459,007 |
| Countries Formerly in Yugoslavia | 0 | - | 4.95 | 124,234 |
| History of Austria | 0 | - | 4.70 | 17,758 |
| Austria Country Quiz | 0 | - | 4.57 | 59,365 |
| Belgium Country Quiz | 0 | - | 4.70 | 71,271 |
| France Country Quiz | 0 | - | 4.70 | 133,886 |
| Regions of France Map Quiz | 0 | - | 4.97 | 143,234 |
| Geography of the French Empire | 0 | - | 4.48 | 26,941 |
| The French Revolution | 0 | - | 4.46 | 23,790 |
| History of France | 0 | - | 4.59 | 56,104 |
| French History A-Z | 0 | - | 4.17 | 21,654 |
| States of Germany Map Quiz | 0 | - | 4.91 | 131,755 |
| States of Germany | 0 | - | 4.96 | 150,163 |
| Biggest Cities in Germany in 1910 | 0 | - | 4.41 | 23,388 |
| Germany Immigration by Country | 0 | - | 4.84 | 80,056 |
| Greece Country Quiz | 0 | - | 4.74 | 65,777 |
| The Life of Alexander the Great | 0 | - | 4.49 | 18,425 |
| Regions of Italy | 0 | - | 4.92 | 74,769 |
| Seven Hills of Rome | 0 | - | 4.70 | 9,117 |
| Luxembourg Country Quiz | 0 | - | 4.77 | 33,491 |
| Monaco Country Quiz | 0 | - | 4.47 | 41,257 |
| Netherlands Immigration by Country | 0 | - | 4.94 | 43,851 |
| Nordic Cities Map Quiz | 0 | - | 4.74 | 89,776 |
| The Vikings! | 0 | - | 4.46 | 28,248 |
| Sweden Immigration by Country | 0 | - | 4.55 | 55,712 |
| Portugal Country Quiz | 0 | - | 4.69 | 71,370 |
| The Portuguese Empire | 0 | - | 4.54 | 11,995 |
| Spain Country Quiz | 0 | - | 4.45 | 127,657 |
| Regions of Spain Quiz | 0 | - | 4.90 | 112,414 |
| Switzerland Country Quiz | 0 | - | 4.51 | 62,951 |
| Cantons of Switzerland | 0 | - | 4.98 | 50,225 |
| Countries and Territories of the United Kingdom | 0 | - | 4.89 | 93,016 |
| Largest Islands in the British Isles With a Map | 0 | - | 4.52 | 38,568 |
| Wives of King Henry VIII | 0 | - | 4.55 | 53,193 |
| Countries the UK Declared War On | 0 | - | 4.61 | 121,825 |
| Geography of the British Empire | 0 | - | 4.48 | 39,486 |
| The Reign of Queen Victoria | 0 | - | 4.33 | 23,341 |
| 10 Closest Megacities to London | 0 | - | 4.90 | 17,505 |
| Counties of Wales | 0 | - | 4.63 | 38,912 |
| Asian Geography By Letter - B | 0 | - | 4.85 | 66,011 |
| Asian Country Superlatives | 0 | - | 4.84 | 80,442 |
| Battle to Country | 0 | - | 4.91 | 52,557 |
| Countries of the Mongol Empire on a Map | 0 | - | 4.99 | 105,944 |
| Category Elimination - African Geography #1 | 0 | - | 4.90 | 91,130 |
| Top 10 Biggest Economies in the Americas | 0 | - | 4.93 | 91,114 |
| U.S. Cabinet Departments | 0 | - | 4.86 | 72,540 |
| European Geography By Letter - E | 0 | - | 4.23 | 112,237 |
| European Geography By Letter - F | 0 | - | 4.17 | 91,680 |
| European Geography By Letter - H | 0 | - | 4.30 | 94,918 |
| European Geography By Letter - G | 0 | - | 4.25 | 101,298 |
| European Geography By Letter - I | 0 | - | 4.10 | 94,506 |
| European Geography By Letter - K | 0 | - | 4.14 | 69,184 |
| European Geography By Letter - O | 0 | - | 4.28 | 61,940 |
