| Name the English Monarchs | 0 | - | 4.92 | 499,247 |
| Monarchies of Europe | 0 | - | 4.90 | 97,551 |
| Modern Day Countries of the Dutch Empire on a Map | 0 | - | 4.87 | 60,534 |
| Modern Day Countries of the Spanish Empire on a Map | 0 | - | 4.95 | 85,701 |
| States of the German Confederation in 1848 | 0 | - | 4.89 | 31,669 |
| The Trojan War | 0 | - | 4.83 | 39,509 |
| Greek Mythology General Knowledge #1 | 0 | - | 4.85 | 110,938 |
| Ancient Roman Trivia #1 | 0 | - | 4.85 | 84,183 |
| Roman Emperors | 0 | - | 4.95 | 118,857 |
| Countries that Beat Portugal | 0 | - | 4.86 | 58,854 |
| European Geography By Letter - P #1 | 0 | - | 4.81 | 96,531 |
| European Geography By Letter - B #2 | 0 | - | 4.84 | 76,535 |
| Countries of Europe in 1815 With a Map | 0 | - | 4.99 | 149,287 |
| Countries of Europe in 1848 | 0 | - | 4.98 | 75,691 |
| Countries of Europe in 1870 with a Map | 0 | - | 4.95 | 63,752 |
| Every Country of Europe Since 1815 With a Map | 0 | - | 4.98 | 70,351 |
| Countries of Europe in 1360 with a Map | 0 | - | 4.99 | 56,244 |
| Kings of France Quiz | 0 | - | 4.20 | 32,601 |
| Monarchies of Asia | 0 | - | 4.97 | 70,735 |
| Europe Map Quiz | 0 | - | 5.00 | 4,740,068 |
| Countries Bordering France | 0 | - | 4.83 | 400,637 |
| Countries Bordering Germany | 0 | - | 4.99 | 367,630 |
| The Reign of Queen Elizabeth I | 0 | - | 4.53 | 31,655 |
| Houses of British Monarchs | 0 | - | 4.53 | 65,395 |
| Top 10 Coldest European Countries | 0 | - | 4.94 | 192,461 |
| Top 10 Hottest European Countries | 0 | - | 4.89 | 126,338 |
| Biggest Countries in Europe in 1700 | 0 | - | 4.73 | 58,239 |
| Category Elimination - European Geography #1 | 0 | - | 4.98 | 231,235 |
| Category Elimination - European Geography #2 | 0 | - | 4.99 | 165,688 |
| France Cities Map Quiz | 0 | - | 4.96 | 165,510 |
| Departments of France | 0 | - | 4.93 | 53,094 |
| Germany Country Quiz | 0 | - | 4.82 | 156,915 |
| Germany Cities Map Quiz | 0 | - | 4.87 | 125,410 |
| Italy Country Quiz | 0 | - | 4.82 | 122,500 |
| Regions of Italy Map Quiz | 0 | - | 4.96 | 148,670 |
| Italy Cities Map Quiz | 0 | - | 4.97 | 151,327 |
| Countries Surrounding Rome | 0 | - | 4.97 | 49,410 |
| Spain Cities Map Quiz | 0 | - | 4.87 | 96,281 |
| Regions of Spain Map Quiz | 0 | - | 4.95 | 184,885 |
| Modern-Day Countries of the British Empire in 1921 | 0 | - | 4.99 | 116,620 |
| England or Wales? | 0 | - | 4.94 | 45,429 |
| Deadliest U.S. Wars | 0 | - | 4.89 | 189,565 |
| Europe by Borders in 30 Seconds | 0 | - | 4.98 | 425,989 |
| French Geography Quiz #1 | 0 | - | 4.89 | 34,581 |
| Countries Bordering Austria | 0 | - | 4.97 | 117,940 |
| Countries that Visit France the Most | 0 | - | 4.85 | 45,640 |
| Countries Closest to Metropolitan France | 0 | - | 4.89 | 71,912 |
| Countries With the Most German Speakers | 0 | - | 4.89 | 94,980 |
| Ancient Greece A-Z | 0 | - | 4.60 | 23,048 |
| Counties of Ireland | 0 | - | 4.92 | 193,666 |
| Countries Bordering Italy | 0 | - | 4.94 | 100,576 |
| Countries Closest to Italy | 0 | - | 4.97 | 196,694 |
| Portugal Country Quiz | 0 | - | 4.69 | 71,506 |
| Countries Closest to Spain | 0 | - | 4.96 | 225,992 |
| United Kingdom A-Z | 0 | - | 4.53 | 87,362 |
| Counties of the UK and Ireland | 0 | - | 4.98 | 129,145 |
| World Capitals Closest to London | 0 | - | 4.87 | 109,954 |
| 50 Busiest Air Routes from London | 0 | - | 4.87 | 95,922 |
| Andorra Country Quiz | 0 | - | 4.90 | 31,484 |
| Countries that Beat Germany | 0 | - | 4.95 | 105,668 |
| Ancient Greek Trivia | 0 | - | 4.62 | 66,830 |
| Geography of Ancient Greece | 0 | - | 4.69 | 31,810 |
| Letters of the Greek Alphabet | 0 | - | 4.97 | 643,523 |
| Name that Greek Letter | 0 | - | 4.94 | 322,165 |
| Countries Italy Declared War On | 0 | - | 4.75 | 43,083 |
| Countries that Beat Italy | 0 | - | 4.85 | 54,037 |
| Countries that Beat Spain | 0 | - | 4.94 | 62,588 |
| British Monopoly Board | 0 | - | 4.52 | 41,081 |
| English Royal Consorts | 0 | - | 4.37 | 37,237 |
| Medieval English History | 0 | - | 4.53 | 43,356 |
| Countries That Use the Euro | 0 | - | 4.95 | 103,564 |
| Europe Cities Map Quiz | 0 | - | 4.99 | 362,869 |
| 10 Easternmost Countries in Europe | 0 | - | 4.89 | 114,026 |
| The Only European Country ... | 0 | - | 4.91 | 214,649 |
| European Countries NOT in NATO | 0 | - | 4.87 | 60,020 |
| History of Russia Quiz | 0 | - | 4.49 | 31,824 |
| Greek Mythology General Knowledge #2 | 0 | - | 4.59 | 73,115 |
| Ancient Greece - Multiple Choice | 0 | - | 4.54 | 41,500 |
| 101 Figures from Greek Mythology | 0 | - | 4.99 | 124,803 |
| History of Italy | 0 | - | 4.55 | 31,868 |
| Ancient Roman Trivia #2 | 0 | - | 4.57 | 38,590 |
| Geography of the Roman Empire | 0 | - | 4.56 | 51,744 |
| Roman Names for Places | 0 | - | 4.62 | 57,982 |
| Geography of the Dutch Empire | 0 | - | 4.61 | 34,529 |
| History of The Netherlands | 0 | - | 4.46 | 17,348 |
| Countries of the Spanish Empire | 0 | - | 4.52 | 77,048 |
| Invasions of Great Britain | 0 | - | 4.51 | 59,660 |
| British History Multiple Choice #1 | 0 | - | 4.46 | 55,006 |
| British History Multiple Choice #2 | 0 | - | 4.42 | 37,873 |
| Zone 1 London Underground Stations - With a Map | 0 | - | 4.90 | 52,088 |
| Flags of Europe Quiz | 0 | - | 4.99 | 1,231,474 |
| Countries of Europe - One Minute Sprint | 0 | - | 4.94 | 1,321,977 |
| 10 Biggest European Countries by Area | 0 | - | 4.99 | 191,971 |
| 10 Westernmost Countries in Europe | 0 | - | 4.96 | 150,550 |
| Top 10 Languages Spoken in Europe | 0 | - | 4.96 | 216,977 |
| European Landmarks Map Quiz | 0 | - | 4.97 | 86,648 |
| Countries of Europe with an Empty Map | 0 | - | 5.00 | 308,860 |
| All First-Level Subdivisions of Europe on a Map | 0 | - | 4.98 | 168,906 |
| Countries with Territory in the Balkans | 0 | - | 4.96 | 88,541 |
| Eastern Europe Map Quiz | 0 | - | 4.91 | 127,387 |
| Slavic Countries | 0 | - | 4.96 | 111,083 |
| Olympian Gods Quiz | 0 | - | 4.96 | 497,579 |
| Ancient Greek Words | 0 | - | 4.93 | 110,951 |
| Italian History A-Z | 0 | - | 4.21 | 17,604 |
| Spanish History A-Z | 0 | - | 4.37 | 19,204 |
| Counties of England | 0 | - | 4.97 | 791,281 |
| "Big Five" European Soccer Champions Since 2000 | 0 | - | 4.97 | 351,539 |
| European Geography By Letter - A | 0 | - | 4.61 | 132,590 |
| European Geography By Letter - B #1 | 0 | - | 4.67 | 111,055 |
| European Geography By Letter - C | 0 | - | 4.46 | 112,023 |
| European Geography By Letter - D | 0 | - | 4.50 | 106,902 |
| European Geography By Letter - L | 0 | - | 4.52 | 112,371 |
| European Geography By Letter - M | 0 | - | 4.64 | 129,168 |
| European Geography By Letter - N | 0 | - | 4.44 | 99,968 |
| European Geography By Letter - R | 0 | - | 4.42 | 92,743 |
| European Geography By Letter - V | 0 | - | 4.43 | 92,117 |
| European Geography By Letter - T | 0 | - | 4.41 | 81,490 |
| European Geography By Letter - S #1 | 0 | - | 4.63 | 99,721 |
| European Secessionist Movements on a Map | 0 | - | 4.53 | 34,811 |
| The Reign of Napoleon | 0 | - | 4.54 | 38,787 |
| States of the Holy Roman Empire in 1356 | 0 | - | 4.97 | 72,910 |
| Famous Irish People | 0 | - | 4.05 | 45,892 |
| Roman Numeral Decoding Quiz | 0 | - | 4.94 | 434,561 |
| Two Letter Roman Numerals | 0 | - | 4.97 | 55,740 |
| 100 Greatest Britons Quiz | 0 | - | 4.41 | 48,107 |
| UK Cities Map Quiz | 0 | - | 4.95 | 462,865 |
| British Geography A-Z | 0 | - | 4.41 | 19,447 |
| Embarrassing Chapters in British History | 0 | - | 4.29 | 32,153 |
| The Reign of Henry VIII | 0 | - | 4.25 | 27,646 |
| British History A-Z #1 | 0 | - | 4.45 | 46,226 |
| British History Quiz for Dummies | 0 | - | 4.70 | 78,256 |
| Elizabeth I... or Elizabeth II? | 0 | - | 4.30 | 24,445 |
| History of Scotland | 0 | - | 4.51 | 21,030 |
| London A-Z | 0 | - | 4.10 | 40,679 |
| Champions League Winners | 0 | - | 4.92 | 999,005 |
| U.S. Citizenship Test Questions | 0 | - | 4.83 | 238,603 |
| European Diaspora - Top 11 Countries | 0 | - | 4.90 | 95,222 |
| 10 European Countries with the Most Tourists | 0 | - | 4.98 | 136,702 |
| Three Band Flags of Europe | 0 | - | 4.98 | 192,240 |
| Catholic Countries in Europe | 0 | - | 4.83 | 94,436 |
| Pixelated Europe Map | 0 | - | 4.88 | 122,069 |
| European Countries with One Border | 0 | - | 4.97 | 181,918 |
| European Countries with the Fewest Borders | 0 | - | 4.97 | 178,818 |
| Category Elimination - European Geography #3 | 0 | - | 4.85 | 80,105 |
| Federal Subjects of Russia | 0 | - | 4.94 | 144,805 |
| Countries That Border Russia | 0 | - | 4.98 | 459,870 |
| Countries Formerly in Yugoslavia | 0 | - | 4.95 | 124,377 |
| History of Austria | 0 | - | 4.70 | 17,780 |
| Austria Country Quiz | 0 | - | 4.57 | 59,462 |
| Belgium Country Quiz | 0 | - | 4.70 | 71,391 |
| France Country Quiz | 0 | - | 4.70 | 134,161 |
| Regions of France Map Quiz | 0 | - | 4.97 | 143,546 |
| Geography of the French Empire | 0 | - | 4.45 | 26,973 |
| The French Revolution | 0 | - | 4.46 | 23,837 |
| History of France | 0 | - | 4.59 | 56,423 |
| French History A-Z | 0 | - | 4.22 | 24,193 |
| States of Germany Map Quiz | 0 | - | 4.91 | 132,013 |
| States of Germany | 0 | - | 4.96 | 150,718 |
| Biggest Cities in Germany in 1910 | 0 | - | 4.41 | 23,411 |
| Germany Immigration by Country | 0 | - | 4.85 | 80,231 |
| Greece Country Quiz | 0 | - | 4.74 | 65,886 |
| The Life of Alexander the Great | 0 | - | 4.49 | 18,444 |
| Regions of Italy | 0 | - | 4.92 | 75,001 |
| Seven Hills of Rome | 0 | - | 4.70 | 9,125 |
| Luxembourg Country Quiz | 0 | - | 4.77 | 33,562 |
| Monaco Country Quiz | 0 | - | 4.47 | 41,315 |
| Netherlands Country Quiz | 0 | - | 4.53 | 80,128 |
| Netherlands Immigration by Country | 0 | - | 4.94 | 44,002 |
| Nordic Cities Map Quiz | 0 | - | 4.74 | 89,906 |
| The Vikings! | 0 | - | 4.46 | 28,270 |
| Sweden Immigration by Country | 0 | - | 4.55 | 55,776 |
| The Portuguese Empire | 0 | - | 4.58 | 12,009 |
| Spain Country Quiz | 0 | - | 4.45 | 127,866 |
| Regions of Spain Quiz | 0 | - | 4.90 | 112,840 |
| Switzerland Country Quiz | 0 | - | 4.51 | 63,055 |
| Cantons of Switzerland | 0 | - | 4.98 | 50,556 |
| Countries and Territories of the United Kingdom | 0 | - | 4.89 | 93,212 |
| Largest Islands in the British Isles With a Map | 0 | - | 4.52 | 38,600 |
| The British Royal Family - Modern Times | 0 | - | 4.16 | 21,487 |
| English Monarchs in Order by First Letter | 0 | - | 4.38 | 31,444 |
| Wives of King Henry VIII | 0 | - | 4.55 | 53,240 |
| Countries the UK Declared War On | 0 | - | 4.61 | 121,988 |
| Geography of the British Empire | 0 | - | 4.48 | 39,547 |
| 10 Closest Megacities to London | 0 | - | 4.90 | 17,584 |
| Counties of Wales | 0 | - | 4.63 | 39,017 |
| Asian Geography By Letter - B | 0 | - | 4.85 | 66,126 |
| Asian Country Superlatives | 0 | - | 4.83 | 80,544 |
| Battle to Country | 0 | - | 4.91 | 52,694 |
| Countries of the Mongol Empire on a Map | 0 | - | 4.99 | 106,147 |
| Category Elimination - African Geography #1 | 0 | - | 4.90 | 91,351 |
| Top 10 Biggest Economies in the Americas | 0 | - | 4.93 | 91,301 |
| U.S. Cabinet Departments | 0 | - | 4.86 | 72,609 |
| European Geography By Letter - E | 0 | - | 4.23 | 112,359 |
| European Geography By Letter - F | 0 | - | 4.17 | 91,793 |
| European Geography By Letter - H | 0 | - | 4.30 | 95,032 |
| European Geography By Letter - G | 0 | - | 4.27 | 101,652 |
| European Geography By Letter - I | 0 | - | 4.10 | 94,615 |
| European Geography By Letter - K | 0 | - | 4.14 | 69,303 |
| European Geography By Letter - O | 0 | - | 4.28 | 62,030 |
| European Geography by Letter - W | 0 | - | 4.20 | 82,373 |
