| European Countries by First 2 Letters | 0 | - | 4.95 | 526,223 |
| Germany Multiple Choice | 0 | - | 4.84 | 54,033 |
| Save Europeans by Guessing Countries | 0 | - | 4.84 | 209,311 |
| States of Germany | 0 | - | 4.96 | 149,950 |
| Germany Immigration by Country | 0 | - | 4.84 | 79,989 |
| States of the German Confederation in 1848 | 0 | - | 4.89 | 31,508 |
| Regions of Italy | 0 | - | 4.92 | 74,654 |
| Netherlands Immigration by Country | 0 | - | 4.94 | 43,779 |
| Regions of Spain Quiz | 0 | - | 4.90 | 112,263 |
| Cantons of Switzerland | 0 | - | 4.98 | 50,098 |
| 10 Closest Megacities to London | 0 | - | 4.90 | 17,400 |
| Count to 10 in Europe: Pro | 0 | - | 4.85 | 68,560 |
| Official European Union Languages | 0 | - | 4.97 | 236,459 |
| European Countries in their Native Language | 0 | - | 4.99 | 156,659 |
| Regions of France | 0 | - | 4.78 | 119,166 |
| France Immigration by Country | 0 | - | 4.72 | 75,940 |
| Departments of France | 0 | - | 4.93 | 52,749 |
| Europe by Borders in 30 Seconds | 0 | - | 4.98 | 425,056 |
| Geography of the French Empire | 0 | - | 4.48 | 26,923 |
| The French Revolution | 0 | - | 4.46 | 23,773 |
| France Multiple Choice | 0 | - | 4.38 | 40,629 |
| Languages of the United Kingdom | 0 | - | 4.13 | 40,695 |
| French Geography Quiz #1 | 0 | - | 4.89 | 34,507 |
| History of France | 0 | - | 4.59 | 55,973 |
| Europe Geography Decoder | 0 | - | 4.86 | 69,520 |
| Word Chain - France | 0 | - | 4.38 | 42,573 |
| Letters of the Greek Alphabet | 0 | - | 4.97 | 641,630 |
| Name that Greek Letter | 0 | - | 4.94 | 321,551 |
| Countries that Beat Switzerland | 0 | - | 4.88 | 41,548 |
| Top European Languages on a Map | 0 | - | 4.77 | 131,075 |
| History of Italy | 0 | - | 4.55 | 31,807 |
| Italy Multiple Choice | 0 | - | 4.74 | 103,135 |
| Geography of the Dutch Empire | 0 | - | 4.62 | 34,476 |
| Countries of the Spanish Empire | 0 | - | 4.52 | 76,974 |
| Top African Languages on a Map | 0 | - | 4.92 | 72,356 |
| Add A Letter - Make a European City | 0 | - | 4.90 | 23,232 |
| Celtic Nations | 0 | - | 4.69 | 46,806 |
| Top 10 Languages Spoken in Europe | 0 | - | 4.96 | 216,220 |
| Most Guessed Cities in Europe - Not Capitals | 0 | - | 4.82 | 86,823 |
| Countries of Europe with an Empty Map | 0 | - | 5.00 | 307,708 |
| All First-Level Subdivisions of Europe on a Map | 0 | - | 4.98 | 167,751 |
| Capitals of French Regions | 0 | - | 4.45 | 15,982 |
| Languages of Spain | 0 | - | 4.36 | 23,143 |
| Counties of England | 0 | - | 4.97 | 788,873 |
| "Big Five" European Soccer Champions Since 2000 | 0 | - | 4.97 | 349,635 |
| Top Asian Languages on a Map | 0 | - | 4.95 | 70,643 |
| Famous Germans | 0 | - | 4.50 | 54,595 |
| German Groups of Things | 0 | - | 4.46 | 38,297 |
| Germany True or False? | 0 | - | 4.61 | 48,518 |
| Largest Islands of Greece | 0 | - | 4.59 | 47,434 |
| Famous Italians by Clue | 0 | - | 4.45 | 88,306 |
| Provinces of the Netherlands | 0 | - | 4.80 | 40,760 |
| 100 Greatest Britons Quiz | 0 | - | 4.41 | 48,037 |
| Foods in a Full English Breakfast | 0 | - | 4.46 | 101,914 |
| European Geography By Letter - P #1 | 0 | - | 4.81 | 96,299 |
| Catholic Countries in Europe | 0 | - | 4.83 | 94,180 |
| Biggest Countries in Europe in 1700 | 0 | - | 4.73 | 58,124 |
| European Geography By Letter - B #2 | 0 | - | 4.83 | 76,182 |
| Category Elimination - European Geography #3 | 0 | - | 4.85 | 79,733 |
| Federal Subjects of Russia | 0 | - | 4.94 | 143,866 |
| History of Austria | 0 | - | 4.70 | 17,742 |
| Famous French People | 0 | - | 4.12 | 27,919 |
| Movies Set in France | 0 | - | 4.26 | 13,069 |
| Regions of France Map Quiz | 0 | - | 4.97 | 143,065 |
| French Inventions | 0 | - | 4.08 | 13,863 |
| History of Paris | 0 | - | 4.24 | 13,612 |
| States of Germany Map Quiz | 0 | - | 4.91 | 131,643 |
| Biggest Cities in Germany in 1910 | 0 | - | 4.41 | 23,380 |
| The Vikings! | 0 | - | 4.45 | 28,239 |
| The Portuguese Empire | 0 | - | 4.54 | 11,987 |
| American to British Word Translation | 0 | - | 4.06 | 117,036 |
| Countries and Territories of the United Kingdom | 0 | - | 4.89 | 92,877 |
| Counties of England Map Quiz | 0 | - | 4.97 | 306,025 |
| Champions League Winners | 0 | - | 4.92 | 995,868 |
| Top 10 Non-English Languages Spoken in New York City | 0 | - | 4.84 | 65,598 |
| Category Elimination - European Geography #1 | 0 | - | 4.98 | 230,415 |
| European Map without 10 Random Countries | 0 | - | 4.97 | 274,109 |
| Category Elimination - European Geography #2 | 0 | - | 4.99 | 165,084 |
| Presidents of France | 0 | - | 4.25 | 23,891 |
| Countries Surrounding Rome | 0 | - | 4.97 | 49,354 |
| England or Wales? | 0 | - | 4.94 | 45,303 |
| All UEFA Champions League Teams Ever | 0 | - | 4.84 | 128,413 |
| Countries with the Most Arabic Speakers | 0 | - | 4.92 | 79,423 |
| Pre-Euro Currencies | 0 | - | 4.44 | 52,439 |
| European Countries with the Fewest Overnight Visitors | 0 | - | 4.78 | 41,597 |
| Word Scramble - European Countries | 0 | - | 4.70 | 140,965 |
| Top 20 Football Clubs in Europe | 0 | - | 4.48 | 112,947 |
| Slavic Languages | 0 | - | 4.67 | 53,957 |
| Capitals of Italian Regions | 0 | - | 4.62 | 36,423 |
| Italian Foods | 0 | - | 4.30 | 72,149 |
| The Mafia Quiz | 0 | - | 4.46 | 23,201 |
| History of The Netherlands | 0 | - | 4.46 | 17,305 |
| Spanish Immigration by Country | 0 | - | 4.63 | 55,238 |
| Canary Islands | 0 | - | 4.61 | 17,395 |
| Switzerland Immigration by Country | 0 | - | 4.70 | 29,125 |
| British Spellings | 0 | - | 4.07 | 99,197 |
| British Groups of Things | 0 | - | 4.25 | 82,664 |
| British Acronyms | 0 | - | 4.39 | 45,613 |
| United Kingdom Decoder | 0 | - | 4.29 | 39,942 |
| Geography of Scotland | 0 | - | 4.63 | 21,473 |
| 100 Longest Rivers in Europe - with a Map | 0 | - | 4.94 | 64,774 |
| Countries With the Most Russian Speakers | 0 | - | 4.97 | 98,345 |
| French Foods | 0 | - | 4.00 | 27,585 |
| France A-Z | 0 | - | 4.16 | 38,050 |
| Geography of Germany | 0 | - | 4.35 | 17,079 |
| History of Germany | 0 | - | 4.39 | 52,609 |
| History of Spain | 0 | - | 4.29 | 20,996 |
| British to American Word Translation | 0 | - | 3.74 | 253,291 |
| British Foods by Description | 0 | - | 3.94 | 48,226 |
| British and American Word Differences | 0 | - | 2.67 | 45,909 |
| British Geography Quiz #2 | 0 | - | 4.29 | 27,502 |
| Bridges of London | 0 | - | 4.17 | 10,061 |
| British Sport Trivia | 0 | - | 4.37 | 20,358 |
| Famous Welsh People | 0 | - | 4.21 | 9,770 |
| African Countries by First 2 Letters | 0 | - | 4.96 | 266,447 |
| History of Russia Quiz | 0 | - | 4.49 | 31,784 |
| Russia Multiple Choice | 0 | - | 4.58 | 40,557 |
| French Geography Quiz #2 | 0 | - | 4.62 | 23,088 |
| Word Chain - Germany | 0 | - | 4.31 | 22,474 |
| The Trojan War | 0 | - | 4.83 | 39,419 |
| Greek Mythology General Knowledge #1 | 0 | - | 4.85 | 110,481 |
| Word Chain - Italy | 0 | - | 4.07 | 23,085 |
| Embarrassing Chapters in Italian History | 0 | - | 4.24 | 12,035 |
| Ancient Roman Trivia #1 | 0 | - | 4.85 | 84,023 |
| Roman Emperors | 0 | - | 4.95 | 118,407 |
| Famous Nordic People | 0 | - | 4.34 | 19,845 |
| Famous Spaniards Quiz | 0 | - | 4.24 | 11,540 |
| Invasions of Great Britain | 0 | - | 4.51 | 59,375 |
| Word Chain - United Kingdom | 0 | - | 4.05 | 29,234 |
| The British Royal Family - Modern Times | 0 | - | 4.16 | 21,458 |
| People on Money - England | 0 | - | 4.29 | 16,561 |
| Name a Valid English City | 0 | - | 4.19 | 16,627 |
| English Monarchs in Order by First Letter | 0 | - | 4.38 | 31,311 |
| Asian Countries by First 2 Letters | 0 | - | 4.91 | 277,052 |
| Australian Capitals | 0 | - | 4.92 | 62,589 |
| European Geography By Letter - A | 0 | - | 4.56 | 132,349 |
| European Geography By Letter - B #1 | 0 | - | 4.67 | 110,854 |
| European Geography By Letter - C | 0 | - | 4.46 | 111,782 |
| European Geography By Letter - D | 0 | - | 4.50 | 106,660 |
| European Geography By Letter - L | 0 | - | 4.52 | 112,183 |
| European Geography By Letter - M | 0 | - | 4.61 | 128,833 |
| European Geography By Letter - N | 0 | - | 4.44 | 99,638 |
| European Geography By Letter - R | 0 | - | 4.42 | 92,602 |
| European Geography By Letter - V | 0 | - | 4.43 | 92,004 |
| European Geography By Letter - T | 0 | - | 4.41 | 81,272 |
| Europe Map Quiz | 0 | - | 5.00 | 4,729,809 |
| Europe Geography Quiz #1 | 0 | - | 4.54 | 70,978 |
| Europe Geography Quiz #2 | 0 | - | 4.57 | 71,605 |
| Europe Geography Quiz #4 | 0 | - | 4.57 | 69,929 |
| Europe Geography Quiz #5 | 0 | - | 4.54 | 60,967 |
| European Geography By Letter - S #1 | 0 | - | 4.63 | 99,571 |
| Top 10 European Countries by English Proficiency | 0 | - | 4.74 | 65,363 |
| Four Letter European Geography #1 | 0 | - | 4.44 | 27,126 |
| Four Letter European Geography #2 | 0 | - | 4.57 | 19,597 |
| Kings of France Quiz | 0 | - | 4.20 | 32,548 |
| The Reign of Napoleon | 0 | - | 4.54 | 38,663 |
| Capitals of German States | 0 | - | 4.74 | 28,805 |
| Chancellors of Germany, 1949–present | 0 | - | 4.60 | 23,090 |
| Olympian Gods Quiz | 0 | - | 4.96 | 495,694 |
| Ancient Greek Words | 0 | - | 4.92 | 110,634 |
| Name Every Beatles Song | 0 | - | 4.97 | 233,975 |
| Bohemian Rhapsody Lyrics | 0 | - | 4.98 | 290,281 |
| Africa Map Quiz | 0 | - | 5.00 | 2,103,702 |
| Oceania Map Quiz | 0 | - | 4.98 | 634,995 |
| European Physical Geography | 0 | - | 4.26 | 33,372 |
| Geography of Russia | 0 | - | 4.57 | 21,424 |
| Slovakia... or Slovenia? | 0 | - | 4.69 | 41,764 |
| France World Cup Squad 2018 | 0 | - | 4.41 | 33,263 |
| Tour de France Winners | 0 | - | 4.27 | 15,209 |
| Embarrassing Chapters in French History | 0 | - | 3.67 | 20,039 |
| Roman Numeral Decoding Quiz | 0 | - | 4.94 | 433,365 |
| Two Letter Roman Numerals | 0 | - | 4.97 | 55,596 |
| Sweden Immigration by Country | 0 | - | 4.55 | 55,679 |
| United Kingdom A-Z | 0 | - | 4.53 | 87,195 |
| British Geography Multiple Choice | 0 | - | 4.49 | 43,166 |
| The Thirteen Dwarves in the Hobbit | 0 | - | 4.81 | 28,387 |
| Wives of King Henry VIII | 0 | - | 4.55 | 53,164 |
| Countries the UK Declared War On | 0 | - | 4.61 | 121,741 |
| Geography of the British Empire | 0 | - | 4.48 | 39,467 |
| Champions League Top 4 | 0 | - | 4.77 | 133,688 |
| East Asia Map Quiz | 0 | - | 4.99 | 1,439,318 |
| Asia Map Quiz | 0 | - | 4.99 | 906,630 |
| Japanese Language - Katakana Practice | 0 | - | 4.61 | 32,522 |
| Countries of Africa | 0 | - | 5.00 | 2,506,452 |
| Landlocked Countries in Africa | 0 | - | 4.99 | 45,778 |
| African East Coast | 0 | - | 4.96 | 95,001 |
| Western Africa Map Quiz | 0 | - | 4.97 | 72,893 |
| Oceanian Capitals - Map Quiz | 0 | - | 4.95 | 49,759 |
| Australia Map Quiz | 0 | - | 4.94 | 342,376 |
| United States Map Quiz | 0 | - | 4.98 | 4,141,046 |
| Top 10 Non-English Languages of Los Angeles | 0 | - | 4.42 | 59,577 |
| Mediterranean Countries Quiz | 0 | - | 4.99 | 210,025 |
| Countries with Territorial Claims in Antarctica | 0 | - | 4.94 | 92,178 |
| Countries That Use the Euro | 0 | - | 4.96 | 102,882 |
| Europe Cities Map Quiz | 0 | - | 4.99 | 362,217 |
| European Geography By Letter - E | 0 | - | 4.23 | 112,168 |
| European Geography By Letter - F | 0 | - | 4.17 | 91,414 |
| European Geography By Letter - H | 0 | - | 4.30 | 94,859 |
| European Geography By Letter - G | 0 | - | 4.25 | 101,235 |
| European Geography By Letter - I | 0 | - | 4.10 | 94,453 |
