| Regions of Italy | 0 | - | 4.92 | 75,200 |
| European Countries by First 2 Letters | 0 | - | 4.95 | 527,757 |
| Germany Multiple Choice | 0 | - | 4.84 | 54,195 |
| States of the German Confederation in 1848 | 0 | - | 4.89 | 31,741 |
| History of Italy | 0 | - | 4.55 | 31,897 |
| Italy Multiple Choice | 0 | - | 4.73 | 103,432 |
| States of Germany | 0 | - | 4.96 | 151,066 |
| Germany Immigration by Country | 0 | - | 4.85 | 80,462 |
| Netherlands Immigration by Country | 0 | - | 4.94 | 47,415 |
| Regions of Spain Quiz | 0 | - | 4.90 | 113,164 |
| Cantons of Switzerland | 0 | - | 4.98 | 50,726 |
| 10 Closest Megacities to London | 0 | - | 4.90 | 17,618 |
| Count to 10 in Europe: Pro | 0 | - | 4.86 | 68,847 |
| Official European Union Languages | 0 | - | 4.97 | 237,648 |
| European Countries in their Native Language | 0 | - | 4.99 | 157,309 |
| Famous Italians by Clue | 0 | - | 4.45 | 88,878 |
| Countries Surrounding Rome | 0 | - | 4.97 | 49,437 |
| Europe by Borders in 30 Seconds | 0 | - | 4.98 | 426,541 |
| Languages of the United Kingdom | 0 | - | 4.13 | 40,811 |
| Capitals of Italian Regions | 0 | - | 4.62 | 36,521 |
| Europe Geography Decoder | 0 | - | 4.86 | 69,744 |
| Letters of the Greek Alphabet | 0 | - | 4.97 | 644,573 |
| Name that Greek Letter | 0 | - | 4.93 | 322,527 |
| Italian Foods | 0 | - | 4.31 | 72,445 |
| The Mafia Quiz | 0 | - | 4.46 | 23,252 |
| Countries that Beat Switzerland | 0 | - | 4.88 | 41,667 |
| Top European Languages on a Map | 0 | - | 4.77 | 131,567 |
| Ancient Roman Trivia #1 | 0 | - | 4.85 | 84,280 |
| Roman Emperors | 0 | - | 4.95 | 119,231 |
| Geography of the Dutch Empire | 0 | - | 4.61 | 34,566 |
| Countries of the Spanish Empire | 0 | - | 4.52 | 77,092 |
| Top African Languages on a Map | 0 | - | 4.92 | 73,205 |
| Add A Letter - Make a European City | 0 | - | 4.90 | 23,316 |
| Celtic Nations | 0 | - | 4.69 | 46,871 |
| Top 10 Languages Spoken in Europe | 0 | - | 4.96 | 217,406 |
| Most Guessed Cities in Europe - Not Capitals | 0 | - | 4.82 | 87,097 |
| Countries of Europe with an Empty Map | 0 | - | 5.00 | 309,289 |
| All First-Level Subdivisions of Europe on a Map | 0 | - | 4.98 | 169,445 |
| Languages of Spain | 0 | - | 4.36 | 23,233 |
| Counties of England | 0 | - | 4.97 | 792,496 |
| "Big Five" European Soccer Champions Since 2000 | 0 | - | 4.97 | 352,468 |
| Top Asian Languages on a Map | 0 | - | 4.95 | 71,023 |
| Regions of France | 0 | - | 4.77 | 119,956 |
| France Immigration by Country | 0 | - | 4.72 | 76,195 |
| Famous Germans | 0 | - | 4.50 | 54,829 |
| German Groups of Things | 0 | - | 4.46 | 38,381 |
| Germany True or False? | 0 | - | 4.61 | 48,661 |
| Largest Islands of Greece | 0 | - | 4.59 | 47,723 |
| Provinces of the Netherlands | 0 | - | 4.80 | 41,056 |
| 100 Greatest Britons Quiz | 0 | - | 4.41 | 48,154 |
| Foods in a Full English Breakfast | 0 | - | 4.46 | 102,823 |
| European Geography By Letter - P #1 | 0 | - | 4.81 | 96,618 |
| Catholic Countries in Europe | 0 | - | 4.83 | 94,588 |
| Biggest Countries in Europe in 1700 | 0 | - | 4.73 | 58,293 |
| European Geography By Letter - B #2 | 0 | - | 4.84 | 76,683 |
| Category Elimination - European Geography #3 | 0 | - | 4.85 | 80,329 |
| Federal Subjects of Russia | 0 | - | 4.94 | 145,282 |
| History of Austria | 0 | - | 4.70 | 17,800 |
| Regions of France Map Quiz | 0 | - | 4.97 | 143,763 |
| Geography of the French Empire | 0 | - | 4.45 | 26,999 |
| The French Revolution | 0 | - | 4.46 | 23,860 |
| France Multiple Choice | 0 | - | 4.38 | 40,679 |
| History of France | 0 | - | 4.59 | 56,618 |
| States of Germany Map Quiz | 0 | - | 4.91 | 132,141 |
| Biggest Cities in Germany in 1910 | 0 | - | 4.41 | 23,423 |
| Word Chain - Italy | 0 | - | 4.07 | 23,135 |
| Embarrassing Chapters in Italian History | 0 | - | 4.24 | 12,066 |
| Two Letter Roman Numerals | 0 | - | 4.97 | 55,834 |
| The Vikings! | 0 | - | 4.46 | 28,285 |
| The Portuguese Empire | 0 | - | 4.58 | 12,027 |
| American to British Word Translation | 0 | - | 4.13 | 138,268 |
| Countries and Territories of the United Kingdom | 0 | - | 4.89 | 93,338 |
| Counties of England Map Quiz | 0 | - | 4.97 | 306,649 |
| Champions League Winners | 0 | - | 4.92 | 1,000,639 |
| Top 10 Non-English Languages Spoken in New York City | 0 | - | 4.85 | 65,900 |
| Category Elimination - European Geography #1 | 0 | - | 4.98 | 231,763 |
| European Map without 10 Random Countries | 0 | - | 4.97 | 275,708 |
| Category Elimination - European Geography #2 | 0 | - | 4.99 | 166,074 |
| Departments of France | 0 | - | 4.93 | 53,297 |
| Roman Numeral Decoding Quiz | 0 | - | 4.94 | 435,132 |
| England or Wales? | 0 | - | 4.94 | 45,488 |
| All UEFA Champions League Teams Ever | 0 | - | 4.85 | 129,238 |
| Countries with the Most Arabic Speakers | 0 | - | 4.92 | 79,739 |
| Pre-Euro Currencies | 0 | - | 4.44 | 52,509 |
| European Countries with the Fewest Overnight Visitors | 0 | - | 4.78 | 41,626 |
| Word Scramble - European Countries | 0 | - | 4.70 | 141,271 |
| Top 20 Football Clubs in Europe | 0 | - | 4.48 | 113,829 |
| Slavic Languages | 0 | - | 4.68 | 54,151 |
| Word Chain - France | 0 | - | 4.38 | 42,675 |
| Countries Italy Declared War On | 0 | - | 4.75 | 43,141 |
| History of The Netherlands | 0 | - | 4.46 | 17,358 |
| Spanish Immigration by Country | 0 | - | 4.63 | 55,351 |
| Canary Islands | 0 | - | 4.61 | 17,437 |
| Switzerland Immigration by Country | 0 | - | 4.70 | 29,396 |
| British Spellings | 0 | - | 4.06 | 99,355 |
| British Groups of Things | 0 | - | 4.25 | 82,777 |
| British Acronyms | 0 | - | 4.39 | 45,702 |
| United Kingdom Decoder | 0 | - | 4.29 | 39,993 |
| Geography of Scotland | 0 | - | 4.63 | 21,547 |
| 100 Longest Rivers in Europe - with a Map | 0 | - | 4.94 | 65,123 |
| Countries With the Most Russian Speakers | 0 | - | 4.97 | 99,516 |
| French Geography Quiz #1 | 0 | - | 4.89 | 34,632 |
| Geography of Germany | 0 | - | 4.35 | 17,136 |
| History of Germany | 0 | - | 4.39 | 52,723 |
| Italian Inventions | 0 | - | 3.81 | 18,424 |
| Ancient Roman Trivia #2 | 0 | - | 4.57 | 38,625 |
| Geography of the Roman Empire | 0 | - | 4.56 | 51,787 |
| Roman Names for Places | 0 | - | 4.62 | 58,052 |
| History of Spain | 0 | - | 4.29 | 21,044 |
| British to American Word Translation | 0 | - | 3.74 | 254,905 |
| British Foods by Description | 0 | - | 3.94 | 48,293 |
| British and American Word Differences | 0 | - | 2.63 | 46,825 |
| British Geography Quiz #2 | 0 | - | 4.29 | 27,547 |
| Bridges of London | 0 | - | 4.17 | 10,079 |
| British Sport Trivia | 0 | - | 4.37 | 20,408 |
| Famous Welsh People | 0 | - | 4.13 | 10,617 |
| African Countries by First 2 Letters | 0 | - | 4.96 | 267,366 |
| History of Russia Quiz | 0 | - | 4.49 | 31,844 |
| Russia Multiple Choice | 0 | - | 4.58 | 40,641 |
| Famous French People | 0 | - | 4.12 | 28,135 |
| Movies Set in France | 0 | - | 4.26 | 13,096 |
| French Inventions | 0 | - | 4.08 | 13,876 |
| History of Paris | 0 | - | 4.24 | 13,629 |
| Word Chain - Germany | 0 | - | 4.31 | 22,523 |
| The Trojan War | 0 | - | 4.83 | 39,563 |
| Greek Mythology General Knowledge #1 | 0 | - | 4.85 | 111,155 |
| Famous Nordic People | 0 | - | 4.34 | 19,979 |
| Famous Spaniards Quiz | 0 | - | 4.24 | 11,567 |
| Invasions of Great Britain | 0 | - | 4.51 | 59,714 |
| Word Chain - United Kingdom | 0 | - | 4.05 | 29,300 |
| The British Royal Family - Modern Times | 0 | - | 4.16 | 21,499 |
| People on Money - England | 0 | - | 4.29 | 16,590 |
| Name a Valid English City | 0 | - | 4.19 | 16,672 |
| English Monarchs in Order by First Letter | 0 | - | 4.38 | 31,502 |
| Asian Countries by First 2 Letters | 0 | - | 4.91 | 278,148 |
| Australian Capitals | 0 | - | 4.92 | 62,657 |
| European Geography By Letter - A | 0 | - | 4.61 | 132,676 |
| European Geography By Letter - B #1 | 0 | - | 4.67 | 111,131 |
| European Geography By Letter - C | 0 | - | 4.46 | 112,106 |
| European Geography By Letter - D | 0 | - | 4.50 | 106,987 |
| European Geography By Letter - L | 0 | - | 4.52 | 112,443 |
| European Geography By Letter - M | 0 | - | 4.64 | 129,317 |
| European Geography By Letter - N | 0 | - | 4.44 | 100,028 |
| European Geography By Letter - R | 0 | - | 4.42 | 92,806 |
| European Geography By Letter - V | 0 | - | 4.43 | 92,440 |
| European Geography By Letter - T | 0 | - | 4.41 | 81,604 |
| Europe Map Quiz | 0 | - | 5.00 | 4,745,683 |
| Europe Geography Quiz #1 | 0 | - | 4.54 | 71,129 |
| Europe Geography Quiz #2 | 0 | - | 4.57 | 71,773 |
| Europe Geography Quiz #4 | 0 | - | 4.57 | 70,078 |
| Europe Geography Quiz #5 | 0 | - | 4.54 | 61,120 |
| European Geography By Letter - S #1 | 0 | - | 4.63 | 99,798 |
| Top 10 European Countries by English Proficiency | 0 | - | 4.73 | 65,532 |
| Four Letter European Geography #2 | 0 | - | 4.57 | 20,234 |
| Capitals of French Regions | 0 | - | 4.45 | 16,017 |
| Capitals of German States | 0 | - | 4.74 | 28,893 |
| Chancellors of Germany, 1949–present | 0 | - | 4.60 | 23,200 |
| Olympian Gods Quiz | 0 | - | 4.96 | 498,389 |
| Ancient Greek Words | 0 | - | 4.93 | 111,094 |
| Seven Hills of Rome | 0 | - | 4.70 | 9,136 |
| Name Every Beatles Song | 0 | - | 4.97 | 235,030 |
| Bohemian Rhapsody Lyrics | 0 | - | 4.98 | 291,128 |
| Africa Map Quiz | 0 | - | 5.00 | 2,110,550 |
| Oceania Map Quiz | 0 | - | 4.98 | 638,534 |
| European Physical Geography | 0 | - | 4.26 | 33,423 |
| Geography of Russia | 0 | - | 4.57 | 21,479 |
| Slovakia... or Slovenia? | 0 | - | 4.69 | 41,853 |
| Italian History A-Z | 0 | - | 4.21 | 17,624 |
| Serie A Champions | 0 | - | 4.29 | 57,971 |
| The Life of Julius Caesar | 0 | - | 4.39 | 39,018 |
| Sweden Immigration by Country | 0 | - | 4.55 | 55,862 |
| United Kingdom A-Z | 0 | - | 4.53 | 87,435 |
| The Thirteen Dwarves in the Hobbit | 0 | - | 4.81 | 28,462 |
| Wives of King Henry VIII | 0 | - | 4.55 | 53,263 |
| Countries the UK Declared War On | 0 | - | 4.61 | 122,092 |
| Geography of the British Empire | 0 | - | 4.48 | 39,582 |
| Champions League Top 4 | 0 | - | 4.77 | 134,938 |
| East Asia Map Quiz | 0 | - | 4.99 | 1,443,882 |
| Asia Map Quiz | 0 | - | 4.99 | 910,883 |
| Japanese Language - Katakana Practice | 0 | - | 4.61 | 32,795 |
| Countries of Africa | 0 | - | 5.00 | 2,521,237 |
| Landlocked Countries in Africa | 0 | - | 4.99 | 46,253 |
| African East Coast | 0 | - | 4.96 | 95,516 |
| Western Africa Map Quiz | 0 | - | 4.97 | 73,357 |
| Oceanian Capitals - Map Quiz | 0 | - | 4.95 | 50,194 |
| Australia Map Quiz | 0 | - | 4.94 | 343,256 |
| United States Map Quiz | 0 | - | 4.98 | 4,148,359 |
| Top 10 Non-English Languages of Los Angeles | 0 | - | 4.42 | 59,726 |
| Mediterranean Countries Quiz | 0 | - | 4.99 | 211,068 |
| Countries with Territorial Claims in Antarctica | 0 | - | 4.94 | 92,465 |
| Countries That Use the Euro | 0 | - | 4.95 | 103,920 |
| Europe Cities Map Quiz | 0 | - | 4.99 | 363,208 |
| European Geography By Letter - E | 0 | - | 4.23 | 112,434 |
| European Geography By Letter - F | 0 | - | 4.17 | 91,854 |
| European Geography By Letter - H | 0 | - | 4.30 | 95,101 |
| European Geography By Letter - G | 0 | - | 4.27 | 101,721 |
| European Geography By Letter - I | 0 | - | 4.10 | 94,674 |
| European Geography By Letter - K | 0 | - | 4.14 | 69,358 |
| European Geography By Letter - O | 0 | - | 4.28 | 62,087 |
| European Geography by Letter - W | 0 | - | 4.20 | 82,428 |
