| European Countries by First 2 Letters | 0 | - | 4.95 | 531,695 |
| Germany Multiple Choice | 0 | - | 4.84 | 54,615 |
| States of the German Confederation in 1848 | 0 | - | 4.90 | 32,338 |
| Save Europeans by Guessing Countries | 0 | - | 4.86 | 215,890 |
| States of Germany | 0 | - | 4.95 | 153,977 |
| Germany Immigration by Country | 0 | - | 4.86 | 81,524 |
| Regions of Italy | 0 | - | 4.92 | 76,678 |
| Netherlands Immigration by Country | 0 | - | 4.93 | 52,646 |
| Regions of Spain Quiz | 0 | - | 4.90 | 114,993 |
| Cantons of Switzerland | 0 | - | 4.98 | 51,603 |
| 10 Closest Megacities to London | 0 | - | 4.90 | 17,805 |
| Count to 10 in Europe: Pro | 0 | - | 4.86 | 69,570 |
| Official European Union Languages | 0 | - | 4.97 | 239,427 |
| European Countries in their Native Language | 0 | - | 4.99 | 158,437 |
| Regions of France | 0 | - | 4.70 | 121,723 |
| France Immigration by Country | 0 | - | 4.70 | 76,827 |
| Departments of France | 0 | - | 4.93 | 54,851 |
| Europe by Borders in 30 Seconds | 0 | - | 4.98 | 430,161 |
| Geography of the French Empire | 0 | - | 4.45 | 27,193 |
| The French Revolution | 0 | - | 4.47 | 24,108 |
| France Multiple Choice | 0 | - | 4.39 | 40,811 |
| Languages of the United Kingdom | 0 | - | 4.14 | 41,016 |
| French Geography Quiz #1 | 0 | - | 4.89 | 35,007 |
| History of France | 0 | - | 4.61 | 57,461 |
| Europe Geography Decoder | 0 | - | 4.86 | 70,219 |
| Famous French People | 0 | - | 4.07 | 35,999 |
| Word Chain - France | 0 | - | 4.38 | 42,896 |
| Letters of the Greek Alphabet | 0 | - | 4.97 | 650,666 |
| Name that Greek Letter | 0 | - | 4.93 | 324,653 |
| Countries that Beat Switzerland | 0 | - | 4.88 | 41,993 |
| Top European Languages on a Map | 0 | - | 4.77 | 132,627 |
| History of Italy | 0 | - | 4.55 | 32,107 |
| Italy Multiple Choice | 0 | - | 4.74 | 104,188 |
| Geography of the Dutch Empire | 0 | - | 4.62 | 34,781 |
| Countries of the Spanish Empire | 0 | - | 4.52 | 77,378 |
| Add A Letter - Make a European City | 0 | - | 4.90 | 23,469 |
| Celtic Nations | 0 | - | 4.61 | 47,061 |
| Top 10 Languages Spoken in Europe | 0 | - | 4.96 | 220,197 |
| Most Guessed Cities in Europe - Not Capitals | 0 | - | 4.82 | 87,885 |
| Countries of Europe with an Empty Map | 0 | - | 5.00 | 312,158 |
| All First-Level Subdivisions of Europe on a Map | 0 | - | 4.99 | 174,910 |
| Capitals of French Regions | 0 | - | 4.45 | 16,154 |
| Languages of Spain | 0 | - | 4.36 | 23,394 |
| Counties of England | 0 | - | 4.97 | 801,217 |
| "Big Five" European Soccer Champions Since 2000 | 0 | - | 4.97 | 360,042 |
| Top Asian Languages on a Map | 0 | - | 4.95 | 71,891 |
| Top African Languages on a Map | 0 | - | 4.94 | 74,921 |
| Famous Germans | 0 | - | 4.50 | 55,664 |
| German Groups of Things | 0 | - | 4.47 | 38,594 |
| Germany True or False? | 0 | - | 4.61 | 48,960 |
| Largest Islands of Greece | 0 | - | 4.59 | 48,321 |
| Famous Italians by Clue | 0 | - | 4.45 | 90,060 |
| Provinces of the Netherlands | 0 | - | 4.80 | 41,630 |
| 100 Greatest Britons Quiz | 0 | - | 4.41 | 48,379 |
| Foods in a Full English Breakfast | 0 | - | 4.46 | 103,649 |
| European Geography By Letter - P #1 | 0 | - | 4.81 | 98,555 |
| Catholic Countries in Europe | 0 | - | 4.83 | 95,606 |
| Biggest Countries in Europe in 1700 | 0 | - | 4.73 | 58,690 |
| European Geography By Letter - B #2 | 0 | - | 4.87 | 88,260 |
| Category Elimination - European Geography #3 | 0 | - | 4.86 | 81,696 |
| Federal Subjects of Russia | 0 | - | 4.95 | 148,899 |
| History of Austria | 0 | - | 4.70 | 17,950 |
| Movies Set in France | 0 | - | 4.26 | 13,140 |
| Regions of France Map Quiz | 0 | - | 4.97 | 145,350 |
| French Inventions | 0 | - | 4.10 | 13,918 |
| History of Paris | 0 | - | 4.24 | 13,667 |
| States of Germany Map Quiz | 0 | - | 4.92 | 133,518 |
| Biggest Cities in Germany in 1910 | 0 | - | 4.41 | 23,541 |
| The Vikings! | 0 | - | 4.46 | 28,391 |
| The Portuguese Empire | 0 | - | 4.58 | 12,095 |
| American to British Word Translation | 0 | - | 4.14 | 139,532 |
| Countries and Territories of the United Kingdom | 0 | - | 4.90 | 94,372 |
| Counties of England Map Quiz | 0 | - | 4.97 | 308,654 |
| Champions League Winners | 0 | - | 4.92 | 1,013,066 |
| Top 10 Non-English Languages Spoken in New York City | 0 | - | 4.85 | 66,593 |
| Category Elimination - European Geography #1 | 0 | - | 4.98 | 235,121 |
| European Map without 10 Random Countries | 0 | - | 4.97 | 278,427 |
| Category Elimination - European Geography #2 | 0 | - | 4.99 | 168,419 |
| Presidents of France | 0 | - | 4.25 | 24,292 |
| Countries Surrounding Rome | 0 | - | 4.97 | 49,699 |
| England or Wales? | 0 | - | 4.94 | 45,891 |
| All UEFA Champions League Teams Ever | 0 | - | 4.85 | 131,622 |
| Countries with the Most Arabic Speakers | 0 | - | 4.92 | 80,645 |
| Pre-Euro Currencies | 0 | - | 4.44 | 52,704 |
| European Countries with the Fewest Overnight Visitors | 0 | - | 4.80 | 41,699 |
| Word Scramble - European Countries | 0 | - | 4.73 | 142,147 |
| Top 20 Football Clubs in Europe | 0 | - | 4.48 | 116,258 |
| Slavic Languages | 0 | - | 4.68 | 54,609 |
| Capitals of Italian Regions | 0 | - | 4.62 | 36,704 |
| Italian Foods | 0 | - | 4.30 | 73,124 |
| The Mafia Quiz | 0 | - | 4.46 | 23,410 |
| History of The Netherlands | 0 | - | 4.46 | 17,529 |
| Spanish Immigration by Country | 0 | - | 4.63 | 55,589 |
| Canary Islands | 0 | - | 4.62 | 17,513 |
| Switzerland Immigration by Country | 0 | - | 4.69 | 29,953 |
| British Spellings | 0 | - | 4.06 | 99,558 |
| British Groups of Things | 0 | - | 4.25 | 82,975 |
| British Acronyms | 0 | - | 4.40 | 45,899 |
| United Kingdom Decoder | 0 | - | 4.29 | 40,085 |
| English Monarchs in Order by First Letter | 0 | - | 4.38 | 32,056 |
| Geography of Scotland | 0 | - | 4.63 | 21,704 |
| 100 Longest Rivers in Europe - with a Map | 0 | - | 4.94 | 65,777 |
| Countries With the Most Russian Speakers | 0 | - | 4.97 | 102,266 |
| French Foods | 0 | - | 4.00 | 27,755 |
| France A-Z | 0 | - | 4.16 | 38,309 |
| Geography of Germany | 0 | - | 4.35 | 17,243 |
| History of Germany | 0 | - | 4.39 | 52,944 |
| History of Spain | 0 | - | 4.23 | 21,145 |
| British to American Word Translation | 0 | - | 3.74 | 255,269 |
| British Foods by Description | 0 | - | 3.94 | 48,364 |
| British and American Word Differences | 0 | - | 2.63 | 46,915 |
| British Geography Quiz #2 | 0 | - | 4.29 | 28,184 |
| Bridges of London | 0 | - | 4.17 | 10,135 |
| British Sport Trivia | 0 | - | 4.37 | 20,510 |
| Famous Welsh People | 0 | - | 4.34 | 11,647 |
| History of Russia Quiz | 0 | - | 4.47 | 31,985 |
| Russia Multiple Choice | 0 | - | 4.58 | 40,831 |
| French Geography Quiz #2 | 0 | - | 4.62 | 23,311 |
| Word Chain - Germany | 0 | - | 4.31 | 22,659 |
| The Trojan War | 0 | - | 4.83 | 39,930 |
| Greek Mythology General Knowledge #1 | 0 | - | 4.85 | 112,665 |
| Word Chain - Italy | 0 | - | 4.07 | 23,205 |
| Embarrassing Chapters in Italian History | 0 | - | 4.24 | 12,145 |
| Ancient Roman Trivia #1 | 0 | - | 4.85 | 85,476 |
| Roman Emperors | 0 | - | 4.95 | 120,876 |
| Famous Nordic People | 0 | - | 4.34 | 20,235 |
| Famous Spaniards Quiz | 0 | - | 4.24 | 11,627 |
| Invasions of Great Britain | 0 | - | 4.51 | 60,039 |
| Word Chain - United Kingdom | 0 | - | 4.05 | 29,384 |
| The British Royal Family - Modern Times | 0 | - | 4.16 | 21,564 |
| People on Money - England | 0 | - | 4.29 | 16,634 |
| Name a Valid English City | 0 | - | 4.19 | 16,792 |
| Asian Countries by First 2 Letters | 0 | - | 4.92 | 280,288 |
| African Countries by First 2 Letters | 0 | - | 4.96 | 269,028 |
| Australian Capitals | 0 | - | 4.92 | 62,804 |
| European Geography By Letter - A | 0 | - | 4.52 | 147,652 |
| European Geography By Letter - B #1 | 0 | - | 4.62 | 121,032 |
| European Geography By Letter - C | 0 | - | 4.43 | 122,764 |
| European Geography By Letter - D | 0 | - | 4.50 | 110,037 |
| European Geography By Letter - L | 0 | - | 4.52 | 114,708 |
| European Geography By Letter - M | 0 | - | 4.69 | 132,036 |
| European Geography By Letter - N | 0 | - | 4.44 | 101,849 |
| European Geography By Letter - R | 0 | - | 4.43 | 94,360 |
| European Geography By Letter - V | 0 | - | 4.42 | 93,575 |
| European Geography By Letter - T | 0 | - | 4.41 | 83,260 |
| Europe Map Quiz | 0 | - | 5.00 | 4,780,511 |
| Europe Geography Quiz #1 | 0 | - | 4.55 | 71,446 |
| Europe Geography Quiz #2 | 0 | - | 4.57 | 72,101 |
| Europe Geography Quiz #4 | 0 | - | 4.57 | 70,397 |
| Europe Geography Quiz #5 | 0 | - | 4.55 | 61,363 |
| European Geography By Letter - S #1 | 0 | - | 4.63 | 101,195 |
| Top 10 European Countries by English Proficiency | 0 | - | 4.74 | 65,913 |
| Four Letter European Geography #1 | 0 | - | 4.41 | 28,416 |
| Four Letter European Geography #2 | 0 | - | 4.54 | 20,641 |
| Kings of France Quiz | 0 | - | 4.20 | 32,876 |
| The Reign of Napoleon | 0 | - | 4.54 | 39,086 |
| Capitals of German States | 0 | - | 4.74 | 29,033 |
| Chancellors of Germany, 1949–present | 0 | - | 4.60 | 23,491 |
| Olympian Gods Quiz | 0 | - | 4.96 | 502,948 |
| Ancient Greek Words | 0 | - | 4.93 | 112,233 |
| Name Every Beatles Song | 0 | - | 4.97 | 237,852 |
| Bohemian Rhapsody Lyrics | 0 | - | 4.98 | 292,558 |
| Oceania Map Quiz | 0 | - | 4.98 | 657,853 |
| European Physical Geography | 0 | - | 4.26 | 33,572 |
| Geography of Russia | 0 | - | 4.57 | 21,574 |
| Slovakia... or Slovenia? | 0 | - | 4.69 | 42,074 |
| France World Cup Squad 2018 | 0 | - | 4.41 | 33,999 |
| Tour de France Winners | 0 | - | 4.27 | 15,471 |
| Embarrassing Chapters in French History | 0 | - | 3.65 | 20,158 |
| Roman Numeral Decoding Quiz | 0 | - | 4.94 | 439,030 |
| Two Letter Roman Numerals | 0 | - | 4.97 | 56,410 |
| Sweden Immigration by Country | 0 | - | 4.55 | 56,310 |
| United Kingdom A-Z | 0 | - | 4.51 | 88,262 |
| The Thirteen Dwarves in the Hobbit | 0 | - | 4.81 | 28,768 |
| Wives of King Henry VIII | 0 | - | 4.55 | 53,435 |
| Countries the UK Declared War On | 0 | - | 4.55 | 123,111 |
| Geography of the British Empire | 0 | - | 4.48 | 39,813 |
| Champions League Top 4 | 0 | - | 4.77 | 138,191 |
| East Asia Map Quiz | 0 | - | 4.99 | 1,451,052 |
| Asia Map Quiz | 0 | - | 4.99 | 922,974 |
| Japanese Language - Katakana Practice | 0 | - | 4.61 | 33,310 |
| Africa Map Quiz | 0 | - | 5.00 | 2,125,890 |
| Oceanian Capitals - Map Quiz | 0 | - | 4.95 | 51,251 |
| Australia Map Quiz | 0 | - | 4.95 | 345,745 |
| United States Map Quiz | 0 | - | 4.98 | 4,167,692 |
| Top 10 Non-English Languages of Los Angeles | 0 | - | 4.43 | 60,045 |
| Mediterranean Countries Quiz | 0 | - | 4.99 | 213,422 |
| Countries with Territorial Claims in Antarctica | 0 | - | 4.94 | 92,833 |
| Countries That Use the Euro | 0 | - | 4.95 | 106,262 |
| Europe Cities Map Quiz | 0 | - | 4.99 | 365,703 |
| European Geography By Letter - E | 0 | - | 4.23 | 114,779 |
| European Geography By Letter - F | 0 | - | 4.15 | 94,089 |
| European Geography By Letter - H | 0 | - | 4.30 | 96,894 |
| European Geography By Letter - G | 0 | - | 4.27 | 103,594 |
| European Geography By Letter - I | 0 | - | 4.07 | 96,292 |
| European Geography By Letter - K | 0 | - | 4.15 | 70,928 |
| European Geography By Letter - O | 0 | - | 4.29 | 63,345 |
| European Geography by Letter - W | 0 | - | 4.21 | 83,404 |
| Europe Geography Quiz #3 | 0 | - | 4.35 | 63,828 |
| European Geography By Letter - S #2 | 0 | - | 4.20 | 51,694 |
