| European Countries by First 2 Letters | 0 | - | 4.95 | 527,349 |
| Germany Multiple Choice | 0 | - | 4.84 | 54,163 |
| States of the German Confederation in 1848 | 0 | - | 4.89 | 31,706 |
| Save Europeans by Guessing Countries | 0 | - | 4.83 | 210,689 |
| States of Germany | 0 | - | 4.96 | 150,876 |
| Germany Immigration by Country | 0 | - | 4.85 | 80,282 |
| Regions of Italy | 0 | - | 4.92 | 75,055 |
| Netherlands Immigration by Country | 0 | - | 4.94 | 44,044 |
| Regions of Spain Quiz | 0 | - | 4.90 | 113,007 |
| Cantons of Switzerland | 0 | - | 4.98 | 50,641 |
| 10 Closest Megacities to London | 0 | - | 4.90 | 17,605 |
| Count to 10 in Europe: Pro | 0 | - | 4.86 | 68,798 |
| Official European Union Languages | 0 | - | 4.97 | 237,493 |
| European Countries in their Native Language | 0 | - | 4.99 | 157,220 |
| Regions of France | 0 | - | 4.78 | 119,758 |
| France Immigration by Country | 0 | - | 4.72 | 76,137 |
| Departments of France | 0 | - | 4.93 | 53,163 |
| Europe by Borders in 30 Seconds | 0 | - | 4.98 | 426,219 |
| Geography of the French Empire | 0 | - | 4.45 | 26,983 |
| The French Revolution | 0 | - | 4.46 | 23,848 |
| France Multiple Choice | 0 | - | 4.38 | 40,673 |
| Languages of the United Kingdom | 0 | - | 4.13 | 40,791 |
| French Geography Quiz #1 | 0 | - | 4.89 | 34,611 |
| History of France | 0 | - | 4.59 | 56,500 |
| Europe Geography Decoder | 0 | - | 4.86 | 69,710 |
| Word Chain - France | 0 | - | 4.38 | 42,661 |
| Letters of the Greek Alphabet | 0 | - | 4.97 | 643,990 |
| Name that Greek Letter | 0 | - | 4.93 | 322,323 |
| Countries that Beat Switzerland | 0 | - | 4.88 | 41,647 |
| Top European Languages on a Map | 0 | - | 4.77 | 131,492 |
| History of Italy | 0 | - | 4.55 | 31,879 |
| Italy Multiple Choice | 0 | - | 4.74 | 103,385 |
| Geography of the Dutch Empire | 0 | - | 4.62 | 34,545 |
| Countries of the Spanish Empire | 0 | - | 4.52 | 77,070 |
| Top African Languages on a Map | 0 | - | 4.92 | 73,066 |
| Add A Letter - Make a European City | 0 | - | 4.90 | 23,300 |
| Celtic Nations | 0 | - | 4.69 | 46,860 |
| Top 10 Languages Spoken in Europe | 0 | - | 4.96 | 217,139 |
| Most Guessed Cities in Europe - Not Capitals | 0 | - | 4.82 | 87,048 |
| Countries of Europe with an Empty Map | 0 | - | 5.00 | 309,048 |
| All First-Level Subdivisions of Europe on a Map | 0 | - | 4.98 | 169,149 |
| Capitals of French Regions | 0 | - | 4.45 | 16,011 |
| Languages of Spain | 0 | - | 4.36 | 23,215 |
| Counties of England | 0 | - | 4.97 | 791,809 |
| "Big Five" European Soccer Champions Since 2000 | 0 | - | 4.97 | 352,048 |
| Top Asian Languages on a Map | 0 | - | 4.95 | 70,944 |
| Famous Germans | 0 | - | 4.50 | 54,794 |
| German Groups of Things | 0 | - | 4.46 | 38,368 |
| Germany True or False? | 0 | - | 4.61 | 48,631 |
| Largest Islands of Greece | 0 | - | 4.59 | 47,670 |
| Famous Italians by Clue | 0 | - | 4.45 | 88,801 |
| Provinces of the Netherlands | 0 | - | 4.80 | 41,003 |
| 100 Greatest Britons Quiz | 0 | - | 4.41 | 48,127 |
| Foods in a Full English Breakfast | 0 | - | 4.46 | 102,762 |
| European Geography By Letter - P #1 | 0 | - | 4.81 | 96,578 |
| Catholic Countries in Europe | 0 | - | 4.83 | 94,508 |
| Biggest Countries in Europe in 1700 | 0 | - | 4.73 | 58,267 |
| European Geography By Letter - B #2 | 0 | - | 4.84 | 76,605 |
| Category Elimination - European Geography #3 | 0 | - | 4.85 | 80,217 |
| Federal Subjects of Russia | 0 | - | 4.94 | 144,985 |
| History of Austria | 0 | - | 4.70 | 17,791 |
| Famous French People | 0 | - | 4.12 | 28,106 |
| Movies Set in France | 0 | - | 4.26 | 13,093 |
| Regions of France Map Quiz | 0 | - | 4.97 | 143,637 |
| French Inventions | 0 | - | 4.08 | 13,873 |
| History of Paris | 0 | - | 4.24 | 13,628 |
| States of Germany Map Quiz | 0 | - | 4.91 | 132,076 |
| Biggest Cities in Germany in 1910 | 0 | - | 4.41 | 23,417 |
| The Vikings! | 0 | - | 4.46 | 28,276 |
| The Portuguese Empire | 0 | - | 4.58 | 12,019 |
| American to British Word Translation | 0 | - | 4.13 | 137,988 |
| Countries and Territories of the United Kingdom | 0 | - | 4.89 | 93,267 |
| Counties of England Map Quiz | 0 | - | 4.97 | 306,512 |
| Champions League Winners | 0 | - | 4.92 | 999,822 |
| Top 10 Non-English Languages Spoken in New York City | 0 | - | 4.84 | 65,846 |
| Category Elimination - European Geography #1 | 0 | - | 4.98 | 231,501 |
| European Map without 10 Random Countries | 0 | - | 4.97 | 275,449 |
| Category Elimination - European Geography #2 | 0 | - | 4.99 | 165,892 |
| Presidents of France | 0 | - | 4.25 | 23,958 |
| Countries Surrounding Rome | 0 | - | 4.97 | 49,419 |
| England or Wales? | 0 | - | 4.94 | 45,453 |
| All UEFA Champions League Teams Ever | 0 | - | 4.85 | 129,087 |
| Countries with the Most Arabic Speakers | 0 | - | 4.92 | 79,688 |
| Pre-Euro Currencies | 0 | - | 4.44 | 52,494 |
| European Countries with the Fewest Overnight Visitors | 0 | - | 4.78 | 41,622 |
| Word Scramble - European Countries | 0 | - | 4.70 | 141,210 |
| Top 20 Football Clubs in Europe | 0 | - | 4.48 | 113,691 |
| Slavic Languages | 0 | - | 4.68 | 54,120 |
| Capitals of Italian Regions | 0 | - | 4.62 | 36,509 |
| Italian Foods | 0 | - | 4.31 | 72,410 |
| The Mafia Quiz | 0 | - | 4.46 | 23,237 |
| History of The Netherlands | 0 | - | 4.46 | 17,351 |
| Spanish Immigration by Country | 0 | - | 4.63 | 55,318 |
| Canary Islands | 0 | - | 4.61 | 17,428 |
| Switzerland Immigration by Country | 0 | - | 4.70 | 29,328 |
| British Spellings | 0 | - | 4.07 | 99,337 |
| British Groups of Things | 0 | - | 4.25 | 82,752 |
| British Acronyms | 0 | - | 4.39 | 45,682 |
| United Kingdom Decoder | 0 | - | 4.29 | 39,985 |
| Geography of Scotland | 0 | - | 4.63 | 21,525 |
| 100 Longest Rivers in Europe - with a Map | 0 | - | 4.94 | 65,065 |
| Countries With the Most Russian Speakers | 0 | - | 4.97 | 99,316 |
| French Foods | 0 | - | 4.00 | 27,630 |
| France A-Z | 0 | - | 4.16 | 38,103 |
| Geography of Germany | 0 | - | 4.35 | 17,125 |
| History of Germany | 0 | - | 4.39 | 52,699 |
| History of Spain | 0 | - | 4.29 | 21,035 |
| British to American Word Translation | 0 | - | 3.74 | 254,874 |
| British Foods by Description | 0 | - | 3.94 | 48,283 |
| British and American Word Differences | 0 | - | 2.64 | 46,812 |
| British Geography Quiz #2 | 0 | - | 4.29 | 27,537 |
| Bridges of London | 0 | - | 4.17 | 10,070 |
| British Sport Trivia | 0 | - | 4.37 | 20,397 |
| Famous Welsh People | 0 | - | 4.21 | 9,788 |
| African Countries by First 2 Letters | 0 | - | 4.96 | 267,202 |
| History of Russia Quiz | 0 | - | 4.49 | 31,829 |
| Russia Multiple Choice | 0 | - | 4.58 | 40,624 |
| French Geography Quiz #2 | 0 | - | 4.62 | 23,139 |
| Word Chain - Germany | 0 | - | 4.31 | 22,514 |
| The Trojan War | 0 | - | 4.83 | 39,534 |
| Greek Mythology General Knowledge #1 | 0 | - | 4.85 | 111,033 |
| Word Chain - Italy | 0 | - | 4.07 | 23,129 |
| Embarrassing Chapters in Italian History | 0 | - | 4.24 | 12,063 |
| Ancient Roman Trivia #1 | 0 | - | 4.85 | 84,227 |
| Roman Emperors | 0 | - | 4.95 | 119,044 |
| Famous Nordic People | 0 | - | 4.34 | 19,955 |
| Famous Spaniards Quiz | 0 | - | 4.24 | 11,561 |
| Invasions of Great Britain | 0 | - | 4.51 | 59,684 |
| Word Chain - United Kingdom | 0 | - | 4.05 | 29,277 |
| The British Royal Family - Modern Times | 0 | - | 4.16 | 21,492 |
| People on Money - England | 0 | - | 4.29 | 16,582 |
| Name a Valid English City | 0 | - | 4.19 | 16,663 |
| English Monarchs in Order by First Letter | 0 | - | 4.38 | 31,476 |
| Asian Countries by First 2 Letters | 0 | - | 4.91 | 277,997 |
| Australian Capitals | 0 | - | 4.92 | 62,642 |
| European Geography By Letter - A | 0 | - | 4.61 | 132,635 |
| European Geography By Letter - B #1 | 0 | - | 4.67 | 111,091 |
| European Geography By Letter - C | 0 | - | 4.46 | 112,068 |
| European Geography By Letter - D | 0 | - | 4.50 | 106,943 |
| European Geography By Letter - L | 0 | - | 4.52 | 112,410 |
| European Geography By Letter - M | 0 | - | 4.64 | 129,246 |
| European Geography By Letter - N | 0 | - | 4.44 | 100,001 |
| European Geography By Letter - R | 0 | - | 4.42 | 92,779 |
| European Geography By Letter - V | 0 | - | 4.43 | 92,378 |
| European Geography By Letter - T | 0 | - | 4.41 | 81,551 |
| Europe Map Quiz | 0 | - | 5.00 | 4,742,324 |
| Europe Geography Quiz #1 | 0 | - | 4.54 | 71,096 |
| Europe Geography Quiz #2 | 0 | - | 4.57 | 71,738 |
| Europe Geography Quiz #4 | 0 | - | 4.57 | 70,042 |
| Europe Geography Quiz #5 | 0 | - | 4.54 | 61,086 |
| European Geography By Letter - S #1 | 0 | - | 4.63 | 99,768 |
| Top 10 European Countries by English Proficiency | 0 | - | 4.74 | 65,500 |
| Four Letter European Geography #1 | 0 | - | 4.44 | 27,763 |
| Four Letter European Geography #2 | 0 | - | 4.57 | 20,131 |
| Kings of France Quiz | 0 | - | 4.20 | 32,613 |
| The Reign of Napoleon | 0 | - | 4.54 | 38,803 |
| Capitals of German States | 0 | - | 4.74 | 28,884 |
| Chancellors of Germany, 1949–present | 0 | - | 4.60 | 23,176 |
| Olympian Gods Quiz | 0 | - | 4.96 | 497,878 |
| Ancient Greek Words | 0 | - | 4.93 | 111,016 |
| Name Every Beatles Song | 0 | - | 4.97 | 234,823 |
| Bohemian Rhapsody Lyrics | 0 | - | 4.98 | 291,027 |
| Africa Map Quiz | 0 | - | 5.00 | 2,109,276 |
| Oceania Map Quiz | 0 | - | 4.98 | 637,755 |
| European Physical Geography | 0 | - | 4.26 | 33,412 |
| Geography of Russia | 0 | - | 4.57 | 21,463 |
| Slovakia... or Slovenia? | 0 | - | 4.69 | 41,836 |
| France World Cup Squad 2018 | 0 | - | 4.41 | 33,409 |
| Tour de France Winners | 0 | - | 4.27 | 15,274 |
| Embarrassing Chapters in French History | 0 | - | 3.65 | 20,063 |
| Roman Numeral Decoding Quiz | 0 | - | 4.94 | 434,797 |
| Two Letter Roman Numerals | 0 | - | 4.97 | 55,783 |
| Sweden Immigration by Country | 0 | - | 4.55 | 55,796 |
| United Kingdom A-Z | 0 | - | 4.53 | 87,384 |
| British Geography Multiple Choice | 0 | - | 4.49 | 43,250 |
| The Thirteen Dwarves in the Hobbit | 0 | - | 4.81 | 28,440 |
| Wives of King Henry VIII | 0 | - | 4.55 | 53,254 |
| Countries the UK Declared War On | 0 | - | 4.61 | 122,042 |
| Geography of the British Empire | 0 | - | 4.48 | 39,564 |
| Champions League Top 4 | 0 | - | 4.77 | 134,716 |
| East Asia Map Quiz | 0 | - | 4.99 | 1,443,332 |
| Asia Map Quiz | 0 | - | 4.99 | 909,962 |
| Japanese Language - Katakana Practice | 0 | - | 4.61 | 32,740 |
| Countries of Africa | 0 | - | 5.00 | 2,517,821 |
| Landlocked Countries in Africa | 0 | - | 4.99 | 46,164 |
| African East Coast | 0 | - | 4.96 | 95,415 |
| Western Africa Map Quiz | 0 | - | 4.97 | 73,280 |
| Oceanian Capitals - Map Quiz | 0 | - | 4.95 | 50,103 |
| Australia Map Quiz | 0 | - | 4.94 | 343,072 |
| United States Map Quiz | 0 | - | 4.98 | 4,146,884 |
| Top 10 Non-English Languages of Los Angeles | 0 | - | 4.42 | 59,699 |
| Mediterranean Countries Quiz | 0 | - | 4.99 | 210,863 |
| Countries with Territorial Claims in Antarctica | 0 | - | 4.94 | 92,417 |
| Countries That Use the Euro | 0 | - | 4.95 | 103,715 |
| Europe Cities Map Quiz | 0 | - | 4.99 | 363,028 |
| European Geography By Letter - E | 0 | - | 4.23 | 112,395 |
| European Geography By Letter - F | 0 | - | 4.17 | 91,825 |
| European Geography By Letter - H | 0 | - | 4.30 | 95,066 |
| European Geography By Letter - G | 0 | - | 4.27 | 101,687 |
| European Geography By Letter - I | 0 | - | 4.10 | 94,650 |
