| European Countries by First 2 Letters | 0 | - | 4.95 | 529,173 |
| Germany Multiple Choice | 0 | - | 4.84 | 54,324 |
| States of the German Confederation in 1848 | 0 | - | 4.89 | 31,930 |
| Save Europeans by Guessing Countries | 0 | - | 4.83 | 212,717 |
| States of Germany | 0 | - | 4.96 | 152,210 |
| Germany Immigration by Country | 0 | - | 4.85 | 80,956 |
| Regions of Italy | 0 | - | 4.92 | 75,725 |
| Netherlands Immigration by Country | 0 | - | 4.93 | 52,034 |
| Regions of Spain Quiz | 0 | - | 4.90 | 113,785 |
| Cantons of Switzerland | 0 | - | 4.98 | 51,111 |
| 10 Closest Megacities to London | 0 | - | 4.90 | 17,682 |
| Count to 10 in Europe: Pro | 0 | - | 4.86 | 69,057 |
| Official European Union Languages | 0 | - | 4.97 | 238,317 |
| European Countries in their Native Language | 0 | - | 4.99 | 157,728 |
| Regions of France | 0 | - | 4.75 | 120,586 |
| France Immigration by Country | 0 | - | 4.70 | 76,457 |
| Departments of France | 0 | - | 4.93 | 53,971 |
| Europe by Borders in 30 Seconds | 0 | - | 4.98 | 427,854 |
| Geography of the French Empire | 0 | - | 4.45 | 27,042 |
| The French Revolution | 0 | - | 4.46 | 23,922 |
| France Multiple Choice | 0 | - | 4.39 | 40,723 |
| Languages of the United Kingdom | 0 | - | 4.13 | 40,877 |
| French Geography Quiz #1 | 0 | - | 4.89 | 34,746 |
| History of France | 0 | - | 4.59 | 56,917 |
| Europe Geography Decoder | 0 | - | 4.86 | 69,931 |
| Famous French People | 0 | - | 4.06 | 35,359 |
| Word Chain - France | 0 | - | 4.38 | 42,763 |
| Letters of the Greek Alphabet | 0 | - | 4.97 | 646,726 |
| Name that Greek Letter | 0 | - | 4.93 | 323,267 |
| Countries that Beat Switzerland | 0 | - | 4.88 | 41,794 |
| Top European Languages on a Map | 0 | - | 4.77 | 131,962 |
| History of Italy | 0 | - | 4.55 | 31,959 |
| Italy Multiple Choice | 0 | - | 4.74 | 103,716 |
| Geography of the Dutch Empire | 0 | - | 4.61 | 34,638 |
| Countries of the Spanish Empire | 0 | - | 4.52 | 77,199 |
| Top African Languages on a Map | 0 | - | 4.92 | 73,848 |
| Add A Letter - Make a European City | 0 | - | 4.90 | 23,375 |
| Celtic Nations | 0 | - | 4.69 | 46,923 |
| Top 10 Languages Spoken in Europe | 0 | - | 4.96 | 218,417 |
| Most Guessed Cities in Europe - Not Capitals | 0 | - | 4.82 | 87,313 |
| Countries of Europe with an Empty Map | 0 | - | 5.00 | 310,219 |
| All First-Level Subdivisions of Europe on a Map | 0 | - | 4.99 | 171,074 |
| Capitals of French Regions | 0 | - | 4.45 | 16,056 |
| Languages of Spain | 0 | - | 4.36 | 23,300 |
| Counties of England | 0 | - | 4.97 | 795,751 |
| "Big Five" European Soccer Champions Since 2000 | 0 | - | 4.97 | 355,235 |
| Top Asian Languages on a Map | 0 | - | 4.95 | 71,349 |
| Famous Germans | 0 | - | 4.50 | 55,246 |
| German Groups of Things | 0 | - | 4.46 | 38,456 |
| Germany True or False? | 0 | - | 4.61 | 48,766 |
| Largest Islands of Greece | 0 | - | 4.59 | 47,943 |
| Famous Italians by Clue | 0 | - | 4.45 | 89,399 |
| Provinces of the Netherlands | 0 | - | 4.80 | 41,299 |
| 100 Greatest Britons Quiz | 0 | - | 4.41 | 48,247 |
| Foods in a Full English Breakfast | 0 | - | 4.46 | 103,154 |
| Catholic Countries in Europe | 0 | - | 4.83 | 95,013 |
| Biggest Countries in Europe in 1700 | 0 | - | 4.73 | 58,447 |
| European Geography By Letter - B #2 | 0 | - | 4.84 | 78,105 |
| Category Elimination - European Geography #3 | 0 | - | 4.86 | 80,844 |
| Federal Subjects of Russia | 0 | - | 4.95 | 146,806 |
| History of Austria | 0 | - | 4.70 | 17,850 |
| Movies Set in France | 0 | - | 4.26 | 13,118 |
| Regions of France Map Quiz | 0 | - | 4.97 | 144,272 |
| French Inventions | 0 | - | 4.08 | 13,892 |
| History of Paris | 0 | - | 4.24 | 13,643 |
| States of Germany Map Quiz | 0 | - | 4.91 | 132,681 |
| The Vikings! | 0 | - | 4.46 | 28,334 |
| The Portuguese Empire | 0 | - | 4.58 | 12,057 |
| American to British Word Translation | 0 | - | 4.14 | 138,900 |
| Countries and Territories of the United Kingdom | 0 | - | 4.89 | 93,927 |
| Counties of England Map Quiz | 0 | - | 4.97 | 307,347 |
| Champions League Winners | 0 | - | 4.92 | 1,005,446 |
| Top 10 Non-English Languages Spoken in New York City | 0 | - | 4.85 | 66,155 |
| Category Elimination - European Geography #1 | 0 | - | 4.98 | 232,934 |
| European Map without 10 Random Countries | 0 | - | 4.97 | 276,526 |
| Category Elimination - European Geography #2 | 0 | - | 4.99 | 166,899 |
| Presidents of France | 0 | - | 4.25 | 24,068 |
| Countries Surrounding Rome | 0 | - | 4.97 | 49,532 |
| England or Wales? | 0 | - | 4.94 | 45,642 |
| All UEFA Champions League Teams Ever | 0 | - | 4.85 | 130,121 |
| Countries with the Most Arabic Speakers | 0 | - | 4.92 | 80,003 |
| Pre-Euro Currencies | 0 | - | 4.44 | 52,583 |
| European Countries with the Fewest Overnight Visitors | 0 | - | 4.80 | 41,649 |
| Word Scramble - European Countries | 0 | - | 4.73 | 141,592 |
| Top 20 Football Clubs in Europe | 0 | - | 4.48 | 114,752 |
| Slavic Languages | 0 | - | 4.68 | 54,312 |
| Capitals of Italian Regions | 0 | - | 4.62 | 36,589 |
| Italian Foods | 0 | - | 4.30 | 72,716 |
| The Mafia Quiz | 0 | - | 4.46 | 23,313 |
| History of The Netherlands | 0 | - | 4.46 | 17,425 |
| Spanish Immigration by Country | 0 | - | 4.63 | 55,442 |
| Canary Islands | 0 | - | 4.62 | 17,471 |
| Switzerland Immigration by Country | 0 | - | 4.70 | 29,653 |
| British Spellings | 0 | - | 4.06 | 99,428 |
| British Groups of Things | 0 | - | 4.25 | 82,852 |
| British Acronyms | 0 | - | 4.40 | 45,780 |
| United Kingdom Decoder | 0 | - | 4.29 | 40,028 |
| English Monarchs in Order by First Letter | 0 | - | 4.38 | 31,732 |
| Geography of Scotland | 0 | - | 4.63 | 21,606 |
| 100 Longest Rivers in Europe - with a Map | 0 | - | 4.94 | 65,393 |
| Countries With the Most Russian Speakers | 0 | - | 4.97 | 100,536 |
| French Foods | 0 | - | 4.00 | 27,689 |
| France A-Z | 0 | - | 4.16 | 38,186 |
| Biggest Cities in Germany in 1910 | 0 | - | 4.40 | 23,468 |
| Geography of Germany | 0 | - | 4.35 | 17,173 |
| History of Germany | 0 | - | 4.39 | 52,796 |
| History of Spain | 0 | - | 4.23 | 21,075 |
| British to American Word Translation | 0 | - | 3.74 | 255,037 |
| British Foods by Description | 0 | - | 3.94 | 48,322 |
| British and American Word Differences | 0 | - | 2.63 | 46,869 |
| British Geography Quiz #2 | 0 | - | 4.29 | 27,586 |
| Bridges of London | 0 | - | 4.17 | 10,098 |
| British Sport Trivia | 0 | - | 4.37 | 20,448 |
| Famous Welsh People | 0 | - | 4.29 | 11,437 |
| African Countries by First 2 Letters | 0 | - | 4.96 | 268,023 |
| History of Russia Quiz | 0 | - | 4.47 | 31,902 |
| Russia Multiple Choice | 0 | - | 4.58 | 40,711 |
| French Geography Quiz #2 | 0 | - | 4.62 | 23,215 |
| Word Chain - Germany | 0 | - | 4.31 | 22,574 |
| The Trojan War | 0 | - | 4.83 | 39,678 |
| Greek Mythology General Knowledge #1 | 0 | - | 4.85 | 111,680 |
| Word Chain - Italy | 0 | - | 4.07 | 23,157 |
| Embarrassing Chapters in Italian History | 0 | - | 4.24 | 12,092 |
| Ancient Roman Trivia #1 | 0 | - | 4.85 | 84,476 |
| Roman Emperors | 0 | - | 4.95 | 119,808 |
| Famous Nordic People | 0 | - | 4.34 | 20,087 |
| Famous Spaniards Quiz | 0 | - | 4.24 | 11,613 |
| Invasions of Great Britain | 0 | - | 4.51 | 59,830 |
| Word Chain - United Kingdom | 0 | - | 4.05 | 29,333 |
| The British Royal Family - Modern Times | 0 | - | 4.16 | 21,521 |
| People on Money - England | 0 | - | 4.29 | 16,608 |
| Name a Valid English City | 0 | - | 4.19 | 16,712 |
| Asian Countries by First 2 Letters | 0 | - | 4.91 | 278,863 |
| Australian Capitals | 0 | - | 4.92 | 62,713 |
| European Geography By Letter - A | 0 | - | 4.52 | 145,680 |
| European Geography By Letter - B #1 | 0 | - | 4.68 | 112,746 |
| European Geography By Letter - C | 0 | - | 4.46 | 113,468 |
| European Geography By Letter - D | 0 | - | 4.50 | 108,184 |
| European Geography By Letter - L | 0 | - | 4.52 | 113,242 |
| European Geography By Letter - M | 0 | - | 4.67 | 130,301 |
| European Geography By Letter - P #1 | 0 | - | 4.80 | 97,330 |
| European Geography By Letter - N | 0 | - | 4.44 | 100,639 |
| European Geography By Letter - R | 0 | - | 4.42 | 93,543 |
| European Geography By Letter - V | 0 | - | 4.43 | 92,863 |
| European Geography By Letter - T | 0 | - | 4.41 | 82,236 |
| Europe Map Quiz | 0 | - | 5.00 | 4,758,837 |
| Europe Geography Quiz #1 | 0 | - | 4.55 | 71,240 |
| Europe Geography Quiz #2 | 0 | - | 4.57 | 71,903 |
| Europe Geography Quiz #4 | 0 | - | 4.57 | 70,193 |
| Europe Geography Quiz #5 | 0 | - | 4.55 | 61,211 |
| European Geography By Letter - S #1 | 0 | - | 4.54 | 100,442 |
| Top 10 European Countries by English Proficiency | 0 | - | 4.74 | 65,678 |
| Four Letter European Geography #2 | 0 | - | 4.57 | 20,400 |
| Kings of France Quiz | 0 | - | 4.20 | 32,700 |
| The Reign of Napoleon | 0 | - | 4.54 | 38,929 |
| Capitals of German States | 0 | - | 4.74 | 28,942 |
| Chancellors of Germany, 1949–present | 0 | - | 4.60 | 23,304 |
| Olympian Gods Quiz | 0 | - | 4.96 | 500,283 |
| Ancient Greek Words | 0 | - | 4.93 | 111,466 |
| Name Every Beatles Song | 0 | - | 4.97 | 235,912 |
| Bohemian Rhapsody Lyrics | 0 | - | 4.98 | 291,573 |
| Africa Map Quiz | 0 | - | 5.00 | 2,116,233 |
| Oceania Map Quiz | 0 | - | 4.98 | 641,383 |
| European Physical Geography | 0 | - | 4.26 | 33,490 |
| Geography of Russia | 0 | - | 4.57 | 21,520 |
| Slovakia... or Slovenia? | 0 | - | 4.69 | 41,929 |
| France World Cup Squad 2018 | 0 | - | 4.41 | 33,641 |
| Tour de France Winners | 0 | - | 4.27 | 15,356 |
| Embarrassing Chapters in French History | 0 | - | 3.65 | 20,097 |
| Roman Numeral Decoding Quiz | 0 | - | 4.94 | 436,703 |
| Two Letter Roman Numerals | 0 | - | 4.97 | 56,062 |
| Sweden Immigration by Country | 0 | - | 4.55 | 56,091 |
| United Kingdom A-Z | 0 | - | 4.51 | 87,621 |
| British Geography Multiple Choice | 0 | - | 4.49 | 43,305 |
| The Thirteen Dwarves in the Hobbit | 0 | - | 4.81 | 28,636 |
| Wives of King Henry VIII | 0 | - | 4.55 | 53,320 |
| Countries the UK Declared War On | 0 | - | 4.61 | 122,391 |
| Geography of the British Empire | 0 | - | 4.48 | 39,646 |
| Champions League Top 4 | 0 | - | 4.77 | 136,129 |
| East Asia Map Quiz | 0 | - | 4.99 | 1,447,560 |
| Asia Map Quiz | 0 | - | 4.99 | 915,633 |
| Japanese Language - Katakana Practice | 0 | - | 4.61 | 33,034 |
| Countries of Africa | 0 | - | 5.00 | 2,533,178 |
| Landlocked Countries in Africa | 0 | - | 4.99 | 46,730 |
| African East Coast | 0 | - | 4.96 | 95,943 |
| Western Africa Map Quiz | 0 | - | 4.97 | 73,755 |
| Oceanian Capitals - Map Quiz | 0 | - | 4.95 | 50,578 |
| Australia Map Quiz | 0 | - | 4.95 | 344,150 |
| United States Map Quiz | 0 | - | 4.98 | 4,155,561 |
| Top 10 Non-English Languages of Los Angeles | 0 | - | 4.42 | 59,857 |
| Mediterranean Countries Quiz | 0 | - | 4.99 | 211,987 |
| Countries with Territorial Claims in Antarctica | 0 | - | 4.94 | 92,619 |
| Countries That Use the Euro | 0 | - | 4.95 | 104,760 |
| Europe Cities Map Quiz | 0 | - | 4.99 | 364,210 |
| European Geography By Letter - E | 0 | - | 4.23 | 113,341 |
| European Geography By Letter - F | 0 | - | 4.17 | 92,660 |
| European Geography By Letter - H | 0 | - | 4.30 | 95,832 |
| European Geography By Letter - G | 0 | - | 4.27 | 102,479 |
| European Geography By Letter - I | 0 | - | 4.10 | 95,322 |
| European Geography By Letter - K | 0 | - | 4.14 | 69,967 |
