| Name the English Monarchs | 0 | - | 4.91 | 507,650 |
| Monarchies of Europe | 0 | - | 4.90 | 99,085 |
| Modern Day Countries of the Dutch Empire on a Map | 0 | - | 4.87 | 61,850 |
| Modern Day Countries of the Spanish Empire on a Map | 0 | - | 4.95 | 87,071 |
| States of the German Confederation in 1848 | 0 | - | 4.90 | 32,531 |
| The Trojan War | 0 | - | 4.83 | 40,120 |
| Greek Mythology General Knowledge #1 | 0 | - | 4.85 | 113,355 |
| Ancient Roman Trivia #1 | 0 | - | 4.85 | 85,729 |
| Roman Emperors | 0 | - | 4.95 | 121,517 |
| Countries that Beat Portugal | 0 | - | 4.86 | 60,039 |
| European Geography By Letter - P #1 | 0 | - | 4.81 | 99,257 |
| European Geography By Letter - B #2 | 0 | - | 4.87 | 89,301 |
| Countries of Europe in 1815 With a Map | 0 | - | 4.99 | 151,645 |
| Countries of Europe in 1848 | 0 | - | 4.98 | 86,248 |
| Countries of Europe in 1870 with a Map | 0 | - | 4.95 | 66,093 |
| Every Country of Europe Since 1815 With a Map | 0 | - | 4.97 | 72,081 |
| Countries of Europe in 1360 with a Map | 0 | - | 4.99 | 57,787 |
| Kings of France Quiz | 0 | - | 4.22 | 32,975 |
| Monarchies of Asia | 0 | - | 4.97 | 71,646 |
| Europe Map Quiz | 0 | - | 5.00 | 4,795,125 |
| Countries Bordering France | 0 | - | 4.83 | 405,494 |
| Countries Bordering Germany | 0 | - | 4.99 | 372,370 |
| The Reign of Queen Elizabeth I | 0 | - | 4.53 | 32,011 |
| Houses of British Monarchs | 0 | - | 4.54 | 66,045 |
| Top 10 Coldest European Countries | 0 | - | 4.94 | 194,138 |
| Top 10 Hottest European Countries | 0 | - | 4.88 | 128,036 |
| Biggest Countries in Europe in 1700 | 0 | - | 4.74 | 58,841 |
| Category Elimination - European Geography #1 | 0 | - | 4.98 | 236,493 |
| Category Elimination - European Geography #2 | 0 | - | 4.99 | 169,395 |
| Andorra Country Quiz | 0 | - | 4.91 | 32,019 |
| France Cities Map Quiz | 0 | - | 4.96 | 168,047 |
| Departments of France | 0 | - | 4.93 | 55,461 |
| Germany Country Quiz | 0 | - | 4.82 | 159,149 |
| Germany Cities Map Quiz | 0 | - | 4.87 | 127,303 |
| Regions of Italy Map Quiz | 0 | - | 4.96 | 150,485 |
| Italy Cities Map Quiz | 0 | - | 4.97 | 153,285 |
| Countries Surrounding Rome | 0 | - | 4.97 | 49,795 |
| Spain Cities Map Quiz | 0 | - | 4.87 | 97,652 |
| Regions of Spain Map Quiz | 0 | - | 4.95 | 187,087 |
| Modern-Day Countries of the British Empire in 1921 | 0 | - | 4.99 | 119,124 |
| England or Wales? | 0 | - | 4.94 | 46,092 |
| Deadliest U.S. Wars | 0 | - | 4.89 | 192,088 |
| Europe by Borders in 30 Seconds | 0 | - | 4.98 | 431,564 |
| French Geography Quiz #1 | 0 | - | 4.89 | 35,321 |
| Countries Bordering Austria | 0 | - | 4.97 | 119,080 |
| Countries that Visit France the Most | 0 | - | 4.85 | 46,252 |
| Countries Closest to Metropolitan France | 0 | - | 4.89 | 72,596 |
| Countries With the Most German Speakers | 0 | - | 4.89 | 99,287 |
| Ancient Greece A-Z | 0 | - | 4.60 | 23,264 |
| Counties of Ireland | 0 | - | 4.92 | 197,782 |
| Countries Bordering Italy | 0 | - | 4.94 | 101,400 |
| Countries Closest to Italy | 0 | - | 4.97 | 199,781 |
| Portugal Country Quiz | 0 | - | 4.69 | 72,456 |
| Countries Closest to Spain | 0 | - | 4.96 | 228,466 |
| United Kingdom A-Z | 0 | - | 4.51 | 88,500 |
| Counties of the UK and Ireland | 0 | - | 4.98 | 132,741 |
| World Capitals Closest to London | 0 | - | 4.88 | 111,459 |
| 50 Busiest Air Routes from London | 0 | - | 4.87 | 97,452 |
| Countries that Beat Germany | 0 | - | 4.94 | 107,558 |
| Ancient Greek Trivia | 0 | - | 4.62 | 67,302 |
| Geography of Ancient Greece | 0 | - | 4.69 | 32,081 |
| Letters of the Greek Alphabet | 0 | - | 4.97 | 653,353 |
| Name that Greek Letter | 0 | - | 4.93 | 325,404 |
| Countries Italy Declared War On | 0 | - | 4.77 | 49,856 |
| Countries that Beat Italy | 0 | - | 4.85 | 55,332 |
| Countries that Beat Spain | 0 | - | 4.94 | 63,462 |
| British Monopoly Board | 0 | - | 4.52 | 41,300 |
| English Royal Consorts | 0 | - | 4.38 | 37,574 |
| Medieval English History | 0 | - | 4.53 | 43,700 |
| Countries That Use the Euro | 0 | - | 4.95 | 107,367 |
| Europe Cities Map Quiz | 0 | - | 4.99 | 366,691 |
| 10 Easternmost Countries in Europe | 0 | - | 4.87 | 117,601 |
| The Only European Country ... | 0 | - | 4.91 | 219,762 |
| European Countries NOT in NATO | 0 | - | 4.91 | 62,923 |
| History of Russia Quiz | 0 | - | 4.47 | 32,031 |
| Greek Mythology General Knowledge #2 | 0 | - | 4.59 | 74,543 |
| Ancient Greece - Multiple Choice | 0 | - | 4.54 | 41,909 |
| 101 Figures from Greek Mythology | 0 | - | 4.99 | 128,102 |
| History of Italy | 0 | - | 4.55 | 32,199 |
| Ancient Roman Trivia #2 | 0 | - | 4.61 | 44,416 |
| Geography of the Roman Empire | 0 | - | 4.55 | 52,282 |
| Roman Names for Places | 0 | - | 4.62 | 58,813 |
| Geography of the Dutch Empire | 0 | - | 4.62 | 34,867 |
| History of The Netherlands | 0 | - | 4.46 | 17,580 |
| Countries of the Spanish Empire | 0 | - | 4.52 | 77,481 |
| Invasions of Great Britain | 0 | - | 4.51 | 60,156 |
| English Monarchs in Order by First Letter | 0 | - | 4.38 | 32,238 |
| British History Multiple Choice #1 | 0 | - | 4.46 | 55,364 |
| British History Multiple Choice #2 | 0 | - | 4.42 | 38,115 |
| Zone 1 London Underground Stations - With a Map | 0 | - | 4.90 | 52,883 |
| Flags of Europe Quiz | 0 | - | 4.99 | 1,262,462 |
| Countries of Europe - One Minute Sprint | 0 | - | 4.94 | 1,337,731 |
| 10 Biggest European Countries by Area | 0 | - | 4.99 | 193,851 |
| 10 Westernmost Countries in Europe | 0 | - | 4.96 | 152,592 |
| Top 10 Languages Spoken in Europe | 0 | - | 4.96 | 221,430 |
| European Landmarks Map Quiz | 0 | - | 4.97 | 87,949 |
| Countries of Europe with an Empty Map | 0 | - | 5.00 | 313,336 |
| All First-Level Subdivisions of Europe on a Map | 0 | - | 4.99 | 176,760 |
| Countries with Territory in the Balkans | 0 | - | 4.96 | 90,433 |
| Eastern Europe Map Quiz | 0 | - | 4.91 | 128,959 |
| Slavic Countries | 0 | - | 4.96 | 112,566 |
| Olympian Gods Quiz | 0 | - | 4.96 | 504,713 |
| Ancient Greek Words | 0 | - | 4.93 | 112,736 |
| Italian History A-Z | 0 | - | 4.16 | 17,963 |
| Spanish History A-Z | 0 | - | 4.37 | 19,543 |
| Counties of England | 0 | - | 4.97 | 804,721 |
| "Big Five" European Soccer Champions Since 2000 | 0 | - | 4.97 | 363,037 |
| European Geography By Letter - A | 0 | - | 4.52 | 148,531 |
| European Geography By Letter - B #1 | 0 | - | 4.62 | 121,973 |
| European Geography By Letter - C | 0 | - | 4.44 | 124,526 |
| European Geography By Letter - D | 0 | - | 4.49 | 119,070 |
| European Geography By Letter - L | 0 | - | 4.52 | 115,470 |
| European Geography By Letter - M | 0 | - | 4.70 | 133,009 |
| European Geography By Letter - N | 0 | - | 4.44 | 102,416 |
| European Geography By Letter - R | 0 | - | 4.43 | 94,992 |
| European Geography By Letter - V | 0 | - | 4.43 | 94,267 |
| European Geography By Letter - T | 0 | - | 4.41 | 83,907 |
| European Geography By Letter - S #1 | 0 | - | 4.63 | 101,651 |
| European Secessionist Movements on a Map | 0 | - | 4.53 | 35,270 |
| Russian History A-Z | 0 | - | 4.35 | 32,328 |
| The Reign of Napoleon | 0 | - | 4.54 | 39,238 |
| States of the Holy Roman Empire in 1356 | 0 | - | 4.97 | 75,670 |
| Famous Irish People | 0 | - | 4.05 | 46,087 |
| Roman Numeral Decoding Quiz | 0 | - | 4.94 | 440,666 |
| Two Letter Roman Numerals | 0 | - | 4.97 | 56,657 |
| 100 Greatest Britons Quiz | 0 | - | 4.41 | 48,518 |
| UK Cities Map Quiz | 0 | - | 4.96 | 466,963 |
| British Geography A-Z | 0 | - | 4.42 | 19,636 |
| Embarrassing Chapters in British History | 0 | - | 4.31 | 32,418 |
| The Reign of Henry VIII | 0 | - | 4.25 | 27,904 |
| British History A-Z #1 | 0 | - | 4.45 | 47,362 |
| British History Quiz for Dummies | 0 | - | 4.70 | 79,184 |
| Elizabeth I... or Elizabeth II? | 0 | - | 4.30 | 24,577 |
| History of Scotland | 0 | - | 4.51 | 21,198 |
| London A-Z | 0 | - | 4.10 | 40,919 |
| Champions League Winners | 0 | - | 4.92 | 1,018,601 |
| U.S. Citizenship Test Questions | 0 | - | 4.83 | 241,035 |
| European Diaspora - Top 11 Countries | 0 | - | 4.88 | 97,033 |
| 10 European Countries with the Most Tourists | 0 | - | 4.98 | 138,800 |
| Three Band Flags of Europe | 0 | - | 4.98 | 194,964 |
| Catholic Countries in Europe | 0 | - | 4.83 | 95,933 |
| Pixelated Europe Map | 0 | - | 4.88 | 123,722 |
| European Countries with One Border | 0 | - | 4.97 | 184,103 |
| European Countries with the Fewest Borders | 0 | - | 4.97 | 180,821 |
| Category Elimination - European Geography #3 | 0 | - | 4.86 | 82,232 |
| Federal Subjects of Russia | 0 | - | 4.95 | 150,032 |
| Countries That Border Russia | 0 | - | 4.98 | 465,084 |
| Countries Formerly in Yugoslavia | 0 | - | 4.95 | 125,626 |
| History of Austria | 0 | - | 4.70 | 17,992 |
| Austria Country Quiz | 0 | - | 4.57 | 60,144 |
| Belgium Country Quiz | 0 | - | 4.72 | 72,409 |
| France Country Quiz | 0 | - | 4.70 | 135,860 |
| Regions of France Map Quiz | 0 | - | 4.97 | 145,870 |
| Geography of the French Empire | 0 | - | 4.45 | 27,242 |
| The French Revolution | 0 | - | 4.47 | 24,175 |
| History of France | 0 | - | 4.61 | 57,765 |
| French History A-Z | 0 | - | 4.27 | 25,212 |
| States of Germany Map Quiz | 0 | - | 4.92 | 134,044 |
| States of Germany | 0 | - | 4.95 | 155,046 |
| Biggest Cities in Germany in 1910 | 0 | - | 4.41 | 23,581 |
| Germany Immigration by Country | 0 | - | 4.86 | 81,856 |
| Greece Country Quiz | 0 | - | 4.74 | 66,748 |
| The Life of Alexander the Great | 0 | - | 4.51 | 18,598 |
| Regions of Italy | 0 | - | 4.92 | 77,316 |
| Italy Country Quiz | 0 | - | 4.77 | 124,276 |
| Seven Hills of Rome | 0 | - | 4.70 | 9,278 |
| Luxembourg Country Quiz | 0 | - | 4.78 | 34,002 |
| Monaco Country Quiz | 0 | - | 4.48 | 41,739 |
| Netherlands Country Quiz | 0 | - | 4.52 | 81,082 |
| Netherlands Immigration by Country | 0 | - | 4.93 | 52,963 |
| Nordic Cities Map Quiz | 0 | - | 4.77 | 90,824 |
| The Vikings! | 0 | - | 4.46 | 28,432 |
| Sweden Immigration by Country | 0 | - | 4.53 | 56,452 |
| The Portuguese Empire | 0 | - | 4.58 | 12,120 |
| Spain Country Quiz | 0 | - | 4.44 | 129,459 |
| Regions of Spain Quiz | 0 | - | 4.91 | 115,678 |
| Switzerland Country Quiz | 0 | - | 4.52 | 63,751 |
| Cantons of Switzerland | 0 | - | 4.98 | 51,955 |
| Countries and Territories of the United Kingdom | 0 | - | 4.90 | 94,693 |
| Largest Islands in the British Isles With a Map | 0 | - | 4.52 | 38,890 |
| The British Royal Family - Modern Times | 0 | - | 4.16 | 21,585 |
| Wives of King Henry VIII | 0 | - | 4.55 | 53,498 |
| Countries the UK Declared War On | 0 | - | 4.55 | 123,412 |
| Geography of the British Empire | 0 | - | 4.48 | 39,890 |
| 10 Closest Megacities to London | 0 | - | 4.90 | 17,879 |
| Counties of Wales | 0 | - | 4.63 | 39,684 |
| Asian Geography By Letter - B | 0 | - | 4.85 | 67,178 |
| Asian Country Superlatives | 0 | - | 4.84 | 81,387 |
| Battle to Country | 0 | - | 4.91 | 54,158 |
| Top 10 Biggest Economies in the Americas | 0 | - | 4.94 | 92,999 |
| U.S. Cabinet Departments | 0 | - | 4.86 | 73,195 |
| European Geography By Letter - E | 0 | - | 4.25 | 122,074 |
| European Geography By Letter - F | 0 | - | 4.15 | 94,850 |
| European Geography By Letter - H | 0 | - | 4.30 | 97,514 |
| European Geography By Letter - G | 0 | - | 4.27 | 104,308 |
| European Geography By Letter - I | 0 | - | 4.07 | 96,839 |
| European Geography By Letter - K | 0 | - | 4.15 | 71,488 |
| European Geography By Letter - O | 0 | - | 4.29 | 63,832 |
| European Geography by Letter - W | 0 | - | 4.21 | 83,764 |
| European Geography By Letter - S #2 | 0 | - | 4.20 | 52,072 |
