| European Countries by First 2 Letters | 0 | - | 4.95 | 526,336 |
| Germany Multiple Choice | 0 | - | 4.84 | 54,048 |
| Save Europeans by Guessing Countries | 0 | - | 4.84 | 209,465 |
| States of Germany | 0 | - | 4.96 | 150,042 |
| Germany Immigration by Country | 0 | - | 4.84 | 80,009 |
| States of the German Confederation in 1848 | 0 | - | 4.89 | 31,520 |
| Regions of Italy | 0 | - | 4.92 | 74,720 |
| Netherlands Immigration by Country | 0 | - | 4.94 | 43,809 |
| Regions of Spain Quiz | 0 | - | 4.90 | 112,336 |
| Cantons of Switzerland | 0 | - | 4.98 | 50,151 |
| 10 Closest Megacities to London | 0 | - | 4.90 | 17,405 |
| Count to 10 in Europe: Pro | 0 | - | 4.85 | 68,580 |
| Official European Union Languages | 0 | - | 4.97 | 236,520 |
| European Countries in their Native Language | 0 | - | 4.99 | 156,700 |
| Regions of France | 0 | - | 4.78 | 119,245 |
| France Immigration by Country | 0 | - | 4.72 | 75,963 |
| Departments of France | 0 | - | 4.93 | 52,809 |
| Europe by Borders in 30 Seconds | 0 | - | 4.98 | 425,196 |
| Geography of the French Empire | 0 | - | 4.48 | 26,933 |
| The French Revolution | 0 | - | 4.46 | 23,784 |
| France Multiple Choice | 0 | - | 4.38 | 40,635 |
| Languages of the United Kingdom | 0 | - | 4.13 | 40,702 |
| French Geography Quiz #1 | 0 | - | 4.89 | 34,512 |
| History of France | 0 | - | 4.59 | 56,040 |
| Europe Geography Decoder | 0 | - | 4.86 | 69,536 |
| Word Chain - France | 0 | - | 4.38 | 42,582 |
| Letters of the Greek Alphabet | 0 | - | 4.97 | 641,871 |
| Name that Greek Letter | 0 | - | 4.94 | 321,652 |
| Countries that Beat Switzerland | 0 | - | 4.88 | 41,567 |
| Top European Languages on a Map | 0 | - | 4.77 | 131,127 |
| History of Italy | 0 | - | 4.55 | 31,814 |
| Italy Multiple Choice | 0 | - | 4.74 | 103,159 |
| Geography of the Dutch Empire | 0 | - | 4.62 | 34,481 |
| Countries of the Spanish Empire | 0 | - | 4.52 | 76,981 |
| Top African Languages on a Map | 0 | - | 4.92 | 72,441 |
| Add A Letter - Make a European City | 0 | - | 4.90 | 23,238 |
| Celtic Nations | 0 | - | 4.69 | 46,812 |
| Top 10 Languages Spoken in Europe | 0 | - | 4.96 | 216,315 |
| Most Guessed Cities in Europe - Not Capitals | 0 | - | 4.82 | 86,848 |
| Countries of Europe with an Empty Map | 0 | - | 5.00 | 307,824 |
| All First-Level Subdivisions of Europe on a Map | 0 | - | 4.98 | 167,876 |
| Capitals of French Regions | 0 | - | 4.45 | 15,984 |
| Languages of Spain | 0 | - | 4.36 | 23,147 |
| Counties of England | 0 | - | 4.97 | 789,158 |
| "Big Five" European Soccer Champions Since 2000 | 0 | - | 4.97 | 349,904 |
| Top Asian Languages on a Map | 0 | - | 4.95 | 70,680 |
| Famous Germans | 0 | - | 4.50 | 54,612 |
| German Groups of Things | 0 | - | 4.46 | 38,306 |
| Germany True or False? | 0 | - | 4.61 | 48,535 |
| Largest Islands of Greece | 0 | - | 4.59 | 47,464 |
| Famous Italians by Clue | 0 | - | 4.45 | 88,470 |
| Provinces of the Netherlands | 0 | - | 4.80 | 40,825 |
| 100 Greatest Britons Quiz | 0 | - | 4.41 | 48,045 |
| Foods in a Full English Breakfast | 0 | - | 4.46 | 101,956 |
| European Geography By Letter - P #1 | 0 | - | 4.81 | 96,328 |
| Catholic Countries in Europe | 0 | - | 4.83 | 94,214 |
| Biggest Countries in Europe in 1700 | 0 | - | 4.73 | 58,144 |
| European Geography By Letter - B #2 | 0 | - | 4.83 | 76,247 |
| Category Elimination - European Geography #3 | 0 | - | 4.85 | 79,786 |
| Federal Subjects of Russia | 0 | - | 4.94 | 143,989 |
| History of Austria | 0 | - | 4.70 | 17,746 |
| Famous French People | 0 | - | 4.12 | 27,945 |
| Movies Set in France | 0 | - | 4.26 | 13,073 |
| Regions of France Map Quiz | 0 | - | 4.97 | 143,119 |
| French Inventions | 0 | - | 4.08 | 13,865 |
| History of Paris | 0 | - | 4.24 | 13,615 |
| States of Germany Map Quiz | 0 | - | 4.91 | 131,680 |
| Biggest Cities in Germany in 1910 | 0 | - | 4.41 | 23,383 |
| The Vikings! | 0 | - | 4.45 | 28,245 |
| The Portuguese Empire | 0 | - | 4.54 | 11,990 |
| American to British Word Translation | 0 | - | 4.06 | 117,059 |
| Countries and Territories of the United Kingdom | 0 | - | 4.89 | 92,907 |
| Counties of England Map Quiz | 0 | - | 4.97 | 306,082 |
| Champions League Winners | 0 | - | 4.92 | 996,315 |
| Top 10 Non-English Languages Spoken in New York City | 0 | - | 4.84 | 65,620 |
| Category Elimination - European Geography #1 | 0 | - | 4.98 | 230,528 |
| European Map without 10 Random Countries | 0 | - | 4.97 | 274,199 |
| Category Elimination - European Geography #2 | 0 | - | 4.99 | 165,162 |
| Presidents of France | 0 | - | 4.25 | 23,903 |
| Countries Surrounding Rome | 0 | - | 4.97 | 49,366 |
| England or Wales? | 0 | - | 4.94 | 45,317 |
| All UEFA Champions League Teams Ever | 0 | - | 4.84 | 128,491 |
| Countries with the Most Arabic Speakers | 0 | - | 4.92 | 79,446 |
| Pre-Euro Currencies | 0 | - | 4.44 | 52,449 |
| European Countries with the Fewest Overnight Visitors | 0 | - | 4.78 | 41,599 |
| Word Scramble - European Countries | 0 | - | 4.70 | 140,986 |
| Top 20 Football Clubs in Europe | 0 | - | 4.48 | 113,041 |
| Slavic Languages | 0 | - | 4.67 | 53,981 |
| Capitals of Italian Regions | 0 | - | 4.62 | 36,428 |
| Italian Foods | 0 | - | 4.31 | 72,182 |
| The Mafia Quiz | 0 | - | 4.46 | 23,206 |
| History of The Netherlands | 0 | - | 4.46 | 17,311 |
| Spanish Immigration by Country | 0 | - | 4.63 | 55,245 |
| Canary Islands | 0 | - | 4.61 | 17,402 |
| Switzerland Immigration by Country | 0 | - | 4.70 | 29,151 |
| British Spellings | 0 | - | 4.07 | 99,203 |
| British Groups of Things | 0 | - | 4.25 | 82,669 |
| British Acronyms | 0 | - | 4.39 | 45,619 |
| United Kingdom Decoder | 0 | - | 4.29 | 39,945 |
| Geography of Scotland | 0 | - | 4.63 | 21,479 |
| 100 Longest Rivers in Europe - with a Map | 0 | - | 4.94 | 64,791 |
| Countries With the Most Russian Speakers | 0 | - | 4.97 | 98,463 |
| French Foods | 0 | - | 4.00 | 27,588 |
| France A-Z | 0 | - | 4.16 | 38,056 |
| Geography of Germany | 0 | - | 4.35 | 17,086 |
| History of Germany | 0 | - | 4.39 | 52,614 |
| History of Spain | 0 | - | 4.29 | 21,001 |
| British to American Word Translation | 0 | - | 3.74 | 253,297 |
| British Foods by Description | 0 | - | 3.94 | 48,230 |
| British and American Word Differences | 0 | - | 2.67 | 45,913 |
| British Geography Quiz #2 | 0 | - | 4.29 | 27,507 |
| Bridges of London | 0 | - | 4.17 | 10,063 |
| British Sport Trivia | 0 | - | 4.37 | 20,363 |
| Famous Welsh People | 0 | - | 4.21 | 9,770 |
| African Countries by First 2 Letters | 0 | - | 4.96 | 266,527 |
| History of Russia Quiz | 0 | - | 4.49 | 31,792 |
| Russia Multiple Choice | 0 | - | 4.58 | 40,565 |
| French Geography Quiz #2 | 0 | - | 4.62 | 23,093 |
| Word Chain - Germany | 0 | - | 4.31 | 22,475 |
| The Trojan War | 0 | - | 4.83 | 39,426 |
| Greek Mythology General Knowledge #1 | 0 | - | 4.85 | 110,534 |
| Word Chain - Italy | 0 | - | 4.07 | 23,087 |
| Embarrassing Chapters in Italian History | 0 | - | 4.24 | 12,041 |
| Ancient Roman Trivia #1 | 0 | - | 4.85 | 84,044 |
| Roman Emperors | 0 | - | 4.95 | 118,483 |
| Famous Nordic People | 0 | - | 4.34 | 19,855 |
| Famous Spaniards Quiz | 0 | - | 4.24 | 11,543 |
| Invasions of Great Britain | 0 | - | 4.51 | 59,387 |
| Word Chain - United Kingdom | 0 | - | 4.05 | 29,239 |
| The British Royal Family - Modern Times | 0 | - | 4.16 | 21,463 |
| People on Money - England | 0 | - | 4.29 | 16,563 |
| Name a Valid English City | 0 | - | 4.19 | 16,629 |
| English Monarchs in Order by First Letter | 0 | - | 4.38 | 31,328 |
| Asian Countries by First 2 Letters | 0 | - | 4.91 | 277,099 |
| Australian Capitals | 0 | - | 4.92 | 62,593 |
| European Geography By Letter - A | 0 | - | 4.56 | 132,403 |
| European Geography By Letter - B #1 | 0 | - | 4.68 | 110,901 |
| European Geography By Letter - C | 0 | - | 4.46 | 111,843 |
| European Geography By Letter - D | 0 | - | 4.50 | 106,706 |
| European Geography By Letter - L | 0 | - | 4.52 | 112,214 |
| European Geography By Letter - M | 0 | - | 4.61 | 128,885 |
| European Geography By Letter - N | 0 | - | 4.44 | 99,669 |
| European Geography By Letter - R | 0 | - | 4.42 | 92,626 |
| European Geography By Letter - V | 0 | - | 4.43 | 92,021 |
| European Geography By Letter - T | 0 | - | 4.41 | 81,305 |
| Europe Map Quiz | 0 | - | 5.00 | 4,731,172 |
| Europe Geography Quiz #1 | 0 | - | 4.54 | 70,991 |
| Europe Geography Quiz #2 | 0 | - | 4.57 | 71,616 |
| Europe Geography Quiz #4 | 0 | - | 4.57 | 69,943 |
| Europe Geography Quiz #5 | 0 | - | 4.54 | 60,982 |
| European Geography By Letter - S #1 | 0 | - | 4.63 | 99,594 |
| Top 10 European Countries by English Proficiency | 0 | - | 4.74 | 65,375 |
| Four Letter European Geography #1 | 0 | - | 4.44 | 27,149 |
| Four Letter European Geography #2 | 0 | - | 4.57 | 19,609 |
| Kings of France Quiz | 0 | - | 4.20 | 32,553 |
| The Reign of Napoleon | 0 | - | 4.54 | 38,676 |
| Capitals of German States | 0 | - | 4.74 | 28,811 |
| Chancellors of Germany, 1949–present | 0 | - | 4.60 | 23,096 |
| Olympian Gods Quiz | 0 | - | 4.96 | 496,103 |
| Ancient Greek Words | 0 | - | 4.92 | 110,689 |
| Name Every Beatles Song | 0 | - | 4.97 | 234,078 |
| Bohemian Rhapsody Lyrics | 0 | - | 4.98 | 290,332 |
| Africa Map Quiz | 0 | - | 5.00 | 2,104,258 |
| Oceania Map Quiz | 0 | - | 4.98 | 635,283 |
| European Physical Geography | 0 | - | 4.26 | 33,373 |
| Geography of Russia | 0 | - | 4.57 | 21,427 |
| Slovakia... or Slovenia? | 0 | - | 4.69 | 41,775 |
| France World Cup Squad 2018 | 0 | - | 4.41 | 33,279 |
| Tour de France Winners | 0 | - | 4.27 | 15,221 |
| Embarrassing Chapters in French History | 0 | - | 3.67 | 20,045 |
| Roman Numeral Decoding Quiz | 0 | - | 4.94 | 433,532 |
| Two Letter Roman Numerals | 0 | - | 4.97 | 55,615 |
| Sweden Immigration by Country | 0 | - | 4.55 | 55,695 |
| United Kingdom A-Z | 0 | - | 4.53 | 87,217 |
| British Geography Multiple Choice | 0 | - | 4.49 | 43,173 |
| The Thirteen Dwarves in the Hobbit | 0 | - | 4.81 | 28,394 |
| Wives of King Henry VIII | 0 | - | 4.55 | 53,173 |
| Countries the UK Declared War On | 0 | - | 4.61 | 121,771 |
| Geography of the British Empire | 0 | - | 4.48 | 39,471 |
| Champions League Top 4 | 0 | - | 4.77 | 133,808 |
| East Asia Map Quiz | 0 | - | 4.99 | 1,440,444 |
| Asia Map Quiz | 0 | - | 4.99 | 906,986 |
| Japanese Language - Katakana Practice | 0 | - | 4.61 | 32,532 |
| Countries of Africa | 0 | - | 5.00 | 2,507,757 |
| Landlocked Countries in Africa | 0 | - | 4.99 | 45,812 |
| African East Coast | 0 | - | 4.96 | 95,042 |
| Western Africa Map Quiz | 0 | - | 4.97 | 72,924 |
| Oceanian Capitals - Map Quiz | 0 | - | 4.95 | 49,794 |
| Australia Map Quiz | 0 | - | 4.94 | 342,473 |
| United States Map Quiz | 0 | - | 4.98 | 4,141,775 |
| Top 10 Non-English Languages of Los Angeles | 0 | - | 4.42 | 59,589 |
| Mediterranean Countries Quiz | 0 | - | 4.99 | 210,133 |
| Countries with Territorial Claims in Antarctica | 0 | - | 4.94 | 92,205 |
| Countries That Use the Euro | 0 | - | 4.96 | 102,977 |
| Europe Cities Map Quiz | 0 | - | 4.99 | 362,301 |
| European Geography By Letter - E | 0 | - | 4.23 | 112,215 |
| European Geography By Letter - F | 0 | - | 4.17 | 91,601 |
| European Geography By Letter - H | 0 | - | 4.30 | 94,900 |
| European Geography By Letter - G | 0 | - | 4.25 | 101,274 |
| European Geography By Letter - I | 0 | - | 4.10 | 94,487 |
