| Name the English Monarchs | 0 | - | 4.92 | 497,644 |
| Monarchies of Europe | 0 | - | 4.90 | 97,262 |
| Modern Day Countries of the Spanish Empire on a Map | 0 | - | 4.95 | 85,444 |
| The Trojan War | 0 | - | 4.83 | 39,413 |
| Greek Mythology General Knowledge #1 | 0 | - | 4.85 | 110,460 |
| Ancient Roman Trivia #1 | 0 | - | 4.85 | 84,015 |
| Roman Emperors | 0 | - | 4.95 | 118,371 |
| Countries that Beat Portugal | 0 | - | 4.86 | 58,627 |
| European Geography By Letter - P #1 | 0 | - | 4.81 | 96,293 |
| European Geography By Letter - B #2 | 0 | - | 4.83 | 76,172 |
| Countries of Europe in 1815 With a Map | 0 | - | 4.99 | 148,853 |
| Countries of Europe in 1848 | 0 | - | 4.98 | 75,349 |
| Countries of Europe in 1870 with a Map | 0 | - | 4.95 | 63,307 |
| Every Country of Europe Since 1815 With a Map | 0 | - | 4.98 | 70,047 |
| Countries of Europe in 1360 with a Map | 0 | - | 4.99 | 55,956 |
| Kings of France Quiz | 0 | - | 4.20 | 32,546 |
| States of the German Confederation in 1848 | 0 | - | 4.89 | 31,501 |
| Monarchies of Asia | 0 | - | 4.97 | 70,565 |
| Europe Map Quiz | 0 | - | 5.00 | 4,729,267 |
| Countries Bordering France | 0 | - | 4.85 | 398,203 |
| Countries Bordering Germany | 0 | - | 4.99 | 366,882 |
| Houses of British Monarchs | 0 | - | 4.53 | 65,283 |
| Top 10 Coldest European Countries | 0 | - | 4.94 | 192,199 |
| Top 10 Hottest European Countries | 0 | - | 4.89 | 126,072 |
| Biggest Countries in Europe in 1700 | 0 | - | 4.73 | 58,119 |
| Category Elimination - European Geography #1 | 0 | - | 4.98 | 230,370 |
| Category Elimination - European Geography #2 | 0 | - | 4.99 | 165,041 |
| France Cities Map Quiz | 0 | - | 4.96 | 165,122 |
| Departments of France | 0 | - | 4.93 | 52,737 |
| Germany Country Quiz | 0 | - | 4.82 | 156,468 |
| Germany Cities Map Quiz | 0 | - | 4.87 | 125,085 |
| Italy Country Quiz | 0 | - | 4.82 | 122,137 |
| Regions of Italy Map Quiz | 0 | - | 4.96 | 148,313 |
| Italy Cities Map Quiz | 0 | - | 4.97 | 151,022 |
| Countries Surrounding Rome | 0 | - | 4.97 | 49,353 |
| Spain Cities Map Quiz | 0 | - | 4.87 | 95,918 |
| Regions of Spain Map Quiz | 0 | - | 4.95 | 184,571 |
| Modern-Day Countries of the British Empire in 1921 | 0 | - | 4.99 | 116,177 |
| England or Wales? | 0 | - | 4.94 | 45,292 |
| Deadliest U.S. Wars | 0 | - | 4.89 | 189,184 |
| Europe by Borders in 30 Seconds | 0 | - | 4.98 | 425,000 |
| French Geography Quiz #1 | 0 | - | 4.89 | 34,503 |
| Countries Bordering Austria | 0 | - | 4.97 | 117,731 |
| Countries that Visit France the Most | 0 | - | 4.85 | 45,496 |
| Countries Closest to Metropolitan France | 0 | - | 4.89 | 71,776 |
| Countries With the Most German Speakers | 0 | - | 4.89 | 94,165 |
| Ancient Greece A-Z | 0 | - | 4.60 | 22,978 |
| Counties of Ireland | 0 | - | 4.92 | 192,932 |
| Countries Bordering Italy | 0 | - | 4.94 | 100,408 |
| Countries Closest to Italy | 0 | - | 4.97 | 196,232 |
| Portugal Country Quiz | 0 | - | 4.69 | 71,311 |
| Countries Closest to Spain | 0 | - | 4.96 | 225,206 |
| United Kingdom A-Z | 0 | - | 4.53 | 87,187 |
| Counties of the UK and Ireland | 0 | - | 4.98 | 128,518 |
| World Capitals Closest to London | 0 | - | 4.87 | 109,664 |
| 50 Busiest Air Routes from London | 0 | - | 4.86 | 95,728 |
| Andorra Country Quiz | 0 | - | 4.90 | 31,369 |
| Countries that Beat Germany | 0 | - | 4.95 | 105,309 |
| Ancient Greek Trivia | 0 | - | 4.62 | 66,754 |
| Geography of Ancient Greece | 0 | - | 4.69 | 31,763 |
| Letters of the Greek Alphabet | 0 | - | 4.97 | 641,514 |
| Name that Greek Letter | 0 | - | 4.94 | 321,511 |
| Countries Italy Declared War On | 0 | - | 4.75 | 42,925 |
| Countries that Beat Italy | 0 | - | 4.85 | 53,836 |
| Countries that Beat Spain | 0 | - | 4.94 | 62,432 |
| British Monopoly Board | 0 | - | 4.52 | 41,024 |
| English Royal Consorts | 0 | - | 4.37 | 37,150 |
| The Reign of Queen Elizabeth I | 0 | - | 4.53 | 31,596 |
| Medieval English History | 0 | - | 4.53 | 43,304 |
| Countries That Use the Euro | 0 | - | 4.96 | 102,853 |
| Europe Cities Map Quiz | 0 | - | 4.99 | 362,191 |
| 10 Easternmost Countries in Europe | 0 | - | 4.89 | 113,436 |
| The Only European Country ... | 0 | - | 4.91 | 213,647 |
| European Countries NOT in NATO | 0 | - | 4.87 | 59,426 |
| History of Russia Quiz | 0 | - | 4.49 | 31,782 |
| Greek Mythology General Knowledge #2 | 0 | - | 4.59 | 72,848 |
| Ancient Greece - Multiple Choice | 0 | - | 4.54 | 41,416 |
| 101 Figures from Greek Mythology | 0 | - | 4.99 | 124,159 |
| History of Italy | 0 | - | 4.55 | 31,806 |
| Ancient Roman Trivia #2 | 0 | - | 4.57 | 38,523 |
| Geography of the Roman Empire | 0 | - | 4.56 | 51,653 |
| Roman Names for Places | 0 | - | 4.62 | 57,850 |
| Geography of the Dutch Empire | 0 | - | 4.62 | 34,470 |
| History of The Netherlands | 0 | - | 4.46 | 17,304 |
| Countries of the Spanish Empire | 0 | - | 4.52 | 76,970 |
| Invasions of Great Britain | 0 | - | 4.51 | 59,371 |
| British History Multiple Choice #1 | 0 | - | 4.46 | 54,947 |
| British History Multiple Choice #2 | 0 | - | 4.42 | 37,822 |
| Zone 1 London Underground Stations - With a Map | 0 | - | 4.90 | 51,924 |
| Flags of Europe Quiz | 0 | - | 4.99 | 1,225,363 |
| Countries of Europe - One Minute Sprint | 0 | - | 4.94 | 1,319,235 |
| 10 Biggest European Countries by Area | 0 | - | 4.99 | 191,646 |
| 10 Westernmost Countries in Europe | 0 | - | 4.96 | 150,245 |
| Top 10 Languages Spoken in Europe | 0 | - | 4.96 | 216,176 |
| European Landmarks Map Quiz | 0 | - | 4.97 | 86,429 |
| Countries of Europe with an Empty Map | 0 | - | 5.00 | 307,677 |
| All First-Level Subdivisions of Europe on a Map | 0 | - | 4.98 | 167,715 |
| Countries with Territory in the Balkans | 0 | - | 4.96 | 88,200 |
| Eastern Europe Map Quiz | 0 | - | 4.91 | 127,140 |
| Slavic Countries | 0 | - | 4.96 | 110,807 |
| Olympian Gods Quiz | 0 | - | 4.96 | 495,489 |
| Ancient Greek Words | 0 | - | 4.92 | 110,619 |
| Italian History A-Z | 0 | - | 4.21 | 17,369 |
| Spanish History A-Z | 0 | - | 4.36 | 19,022 |
| Counties of England | 0 | - | 4.97 | 788,749 |
| "Big Five" European Soccer Champions Since 2000 | 0 | - | 4.97 | 349,543 |
| European Geography By Letter - A | 0 | - | 4.56 | 132,341 |
| European Geography By Letter - B #1 | 0 | - | 4.67 | 110,845 |
| European Geography By Letter - C | 0 | - | 4.46 | 111,778 |
| European Geography By Letter - D | 0 | - | 4.50 | 106,652 |
| European Geography By Letter - L | 0 | - | 4.52 | 112,176 |
| European Geography By Letter - M | 0 | - | 4.61 | 128,815 |
| European Geography By Letter - N | 0 | - | 4.44 | 99,636 |
| European Geography By Letter - R | 0 | - | 4.42 | 92,599 |
| European Geography By Letter - V | 0 | - | 4.43 | 92,001 |
| European Geography By Letter - T | 0 | - | 4.41 | 81,268 |
| European Geography By Letter - S #1 | 0 | - | 4.63 | 99,568 |
| European Secessionist Movements on a Map | 0 | - | 4.53 | 34,731 |
| The Reign of Napoleon | 0 | - | 4.54 | 38,657 |
| States of the Holy Roman Empire in 1356 | 0 | - | 4.97 | 72,391 |
| Famous Irish People | 0 | - | 4.05 | 45,852 |
| Roman Numeral Decoding Quiz | 0 | - | 4.94 | 433,314 |
| Two Letter Roman Numerals | 0 | - | 4.97 | 55,586 |
| 100 Greatest Britons Quiz | 0 | - | 4.41 | 48,034 |
| UK Cities Map Quiz | 0 | - | 4.95 | 462,026 |
| Embarrassing Chapters in British History | 0 | - | 4.29 | 32,105 |
| The Reign of Henry VIII | 0 | - | 4.25 | 27,600 |
| British History A-Z #1 | 0 | - | 4.45 | 45,781 |
| British History Quiz for Dummies | 0 | - | 4.70 | 78,065 |
| Elizabeth I... or Elizabeth II? | 0 | - | 4.30 | 24,426 |
| History of Scotland | 0 | - | 4.51 | 20,996 |
| London A-Z | 0 | - | 4.10 | 40,629 |
| Champions League Winners | 0 | - | 4.92 | 995,688 |
| U.S. Citizenship Test Questions | 0 | - | 4.83 | 238,250 |
| European Diaspora - Top 11 Countries | 0 | - | 4.90 | 94,993 |
| 10 European Countries with the Most Tourists | 0 | - | 4.98 | 136,291 |
| Three Band Flags of Europe | 0 | - | 4.98 | 191,771 |
| Catholic Countries in Europe | 0 | - | 4.83 | 94,165 |
| Pixelated Europe Map | 0 | - | 4.88 | 121,737 |
| European Countries with One Border | 0 | - | 4.97 | 181,537 |
| European Countries with the Fewest Borders | 0 | - | 4.97 | 178,288 |
| Category Elimination - European Geography #3 | 0 | - | 4.85 | 79,711 |
| Federal Subjects of Russia | 0 | - | 4.94 | 143,770 |
| Countries That Border Russia | 0 | - | 4.98 | 458,722 |
| Countries Formerly in Yugoslavia | 0 | - | 4.95 | 124,135 |
| History of Austria | 0 | - | 4.70 | 17,742 |
| Austria Country Quiz | 0 | - | 4.57 | 59,310 |
| Belgium Country Quiz | 0 | - | 4.70 | 71,192 |
| France Country Quiz | 0 | - | 4.70 | 133,782 |
| Regions of France Map Quiz | 0 | - | 4.97 | 143,054 |
| Geography of the French Empire | 0 | - | 4.48 | 26,920 |
| The French Revolution | 0 | - | 4.46 | 23,764 |
| History of France | 0 | - | 4.59 | 55,952 |
| French History A-Z | 0 | - | 4.17 | 18,634 |
| States of Germany Map Quiz | 0 | - | 4.91 | 131,631 |
| States of Germany | 0 | - | 4.96 | 149,904 |
| Biggest Cities in Germany in 1910 | 0 | - | 4.41 | 23,379 |
| Germany Immigration by Country | 0 | - | 4.84 | 79,970 |
| Greece Country Quiz | 0 | - | 4.74 | 65,728 |
| The Life of Alexander the Great | 0 | - | 4.49 | 18,416 |
| Regions of Italy | 0 | - | 4.92 | 74,640 |
| Seven Hills of Rome | 0 | - | 4.70 | 9,109 |
| Luxembourg Country Quiz | 0 | - | 4.77 | 33,462 |
| Monaco Country Quiz | 0 | - | 4.47 | 41,213 |
| Netherlands Country Quiz | 0 | - | 4.50 | 79,928 |
| Netherlands Immigration by Country | 0 | - | 4.94 | 43,773 |
| Nordic Cities Map Quiz | 0 | - | 4.74 | 89,739 |
| The Vikings! | 0 | - | 4.45 | 28,237 |
| Sweden Immigration by Country | 0 | - | 4.55 | 55,671 |
| The Portuguese Empire | 0 | - | 4.54 | 11,984 |
| Spain Country Quiz | 0 | - | 4.45 | 127,548 |
| Regions of Spain Quiz | 0 | - | 4.90 | 112,217 |
| Switzerland Country Quiz | 0 | - | 4.51 | 62,918 |
| Cantons of Switzerland | 0 | - | 4.98 | 50,088 |
| Countries and Territories of the United Kingdom | 0 | - | 4.89 | 92,870 |
| Largest Islands in the British Isles With a Map | 0 | - | 4.52 | 38,558 |
| The British Royal Family - Modern Times | 0 | - | 4.16 | 21,455 |
| English Monarchs in Order by First Letter | 0 | - | 4.38 | 31,306 |
| Wives of King Henry VIII | 0 | - | 4.55 | 53,162 |
| Countries the UK Declared War On | 0 | - | 4.61 | 121,734 |
| Geography of the British Empire | 0 | - | 4.48 | 39,466 |
| 10 Closest Megacities to London | 0 | - | 4.90 | 17,399 |
| Counties of Wales | 0 | - | 4.63 | 38,873 |
| Asian Geography By Letter - B | 0 | - | 4.85 | 65,962 |
| Asian Country Superlatives | 0 | - | 4.83 | 80,410 |
| Battle to Country | 0 | - | 4.91 | 52,475 |
| Countries of the Mongol Empire on a Map | 0 | - | 4.99 | 105,781 |
| Category Elimination - African Geography #1 | 0 | - | 4.90 | 91,034 |
| Top 10 Biggest Economies in the Americas | 0 | - | 4.94 | 91,039 |
| U.S. Cabinet Departments | 0 | - | 4.86 | 72,503 |
| European Geography By Letter - E | 0 | - | 4.23 | 112,164 |
| European Geography By Letter - F | 0 | - | 4.17 | 91,405 |
| European Geography By Letter - H | 0 | - | 4.30 | 94,851 |
| European Geography By Letter - G | 0 | - | 4.25 | 101,227 |
| European Geography By Letter - I | 0 | - | 4.10 | 94,444 |
| European Geography By Letter - K | 0 | - | 4.14 | 69,122 |
| European Geography By Letter - O | 0 | - | 4.28 | 61,896 |
| European Geography by Letter - W | 0 | - | 4.20 | 82,275 |
| European Geography By Letter - S #2 | 0 | - | 4.19 | 50,486 |
| European Geography A-Z | 0 | - | 4.28 | 48,978 |
