| Regions of Italy | 0 | - | 4.92 | 77,210 |
| European Countries by First 2 Letters | 0 | - | 4.95 | 532,857 |
| Germany Multiple Choice | 0 | - | 4.84 | 54,729 |
| States of the German Confederation in 1848 | 0 | - | 4.90 | 32,501 |
| Save Europeans by Guessing Countries | 0 | - | 4.86 | 217,217 |
| History of Italy | 0 | - | 4.55 | 32,170 |
| Italy Multiple Choice | 0 | - | 4.74 | 104,466 |
| States of Germany | 0 | - | 4.95 | 154,822 |
| Germany Immigration by Country | 0 | - | 4.86 | 81,769 |
| Netherlands Immigration by Country | 0 | - | 4.93 | 52,871 |
| Regions of Spain Quiz | 0 | - | 4.90 | 115,499 |
| Cantons of Switzerland | 0 | - | 4.98 | 51,854 |
| 10 Closest Megacities to London | 0 | - | 4.90 | 17,852 |
| Count to 10 in Europe: Pro | 0 | - | 4.86 | 69,818 |
| Official European Union Languages | 0 | - | 4.97 | 240,047 |
| European Countries in their Native Language | 0 | - | 4.99 | 158,767 |
| Famous Italians by Clue | 0 | - | 4.45 | 90,495 |
| Countries Surrounding Rome | 0 | - | 4.97 | 49,766 |
| Europe by Borders in 30 Seconds | 0 | - | 4.98 | 431,236 |
| Languages of the United Kingdom | 0 | - | 4.14 | 41,083 |
| Capitals of Italian Regions | 0 | - | 4.62 | 36,752 |
| Europe Geography Decoder | 0 | - | 4.87 | 70,362 |
| Letters of the Greek Alphabet | 0 | - | 4.97 | 652,610 |
| Name that Greek Letter | 0 | - | 4.93 | 325,170 |
| Italian Foods | 0 | - | 4.30 | 73,342 |
| The Mafia Quiz | 0 | - | 4.46 | 23,447 |
| Countries that Beat Switzerland | 0 | - | 4.88 | 42,086 |
| Top European Languages on a Map | 0 | - | 4.77 | 132,960 |
| Ancient Roman Trivia #1 | 0 | - | 4.85 | 85,654 |
| Roman Emperors | 0 | - | 4.95 | 121,358 |
| Geography of the Dutch Empire | 0 | - | 4.62 | 34,839 |
| Countries of the Spanish Empire | 0 | - | 4.52 | 77,457 |
| Celtic Nations | 0 | - | 4.61 | 47,121 |
| Top 10 Languages Spoken in Europe | 0 | - | 4.96 | 221,125 |
| Most Guessed Cities in Europe - Not Capitals | 0 | - | 4.83 | 88,103 |
| Countries of Europe with an Empty Map | 0 | - | 5.00 | 313,058 |
| All First-Level Subdivisions of Europe on a Map | 0 | - | 4.99 | 176,296 |
| Languages of Spain | 0 | - | 4.36 | 23,459 |
| Counties of England | 0 | - | 4.97 | 803,832 |
| "Big Five" European Soccer Champions Since 2000 | 0 | - | 4.97 | 362,326 |
| Top Asian Languages on a Map | 0 | - | 4.95 | 72,178 |
| Top African Languages on a Map | 0 | - | 4.94 | 75,416 |
| Add A Letter - Make a European City | 0 | - | 4.88 | 23,525 |
| Regions of France | 0 | - | 4.70 | 122,285 |
| France Immigration by Country | 0 | - | 4.70 | 76,982 |
| Famous Germans | 0 | - | 4.50 | 55,848 |
| German Groups of Things | 0 | - | 4.47 | 38,655 |
| Germany True or False? | 0 | - | 4.61 | 49,053 |
| Largest Islands of Greece | 0 | - | 4.59 | 48,550 |
| Provinces of the Netherlands | 0 | - | 4.80 | 41,882 |
| 100 Greatest Britons Quiz | 0 | - | 4.41 | 48,426 |
| Foods in a Full English Breakfast | 0 | - | 4.46 | 103,909 |
| European Geography By Letter - P #1 | 0 | - | 4.81 | 99,069 |
| Catholic Countries in Europe | 0 | - | 4.83 | 95,856 |
| Biggest Countries in Europe in 1700 | 0 | - | 4.73 | 58,794 |
| European Geography By Letter - B #2 | 0 | - | 4.86 | 89,032 |
| Category Elimination - European Geography #3 | 0 | - | 4.86 | 82,106 |
| Federal Subjects of Russia | 0 | - | 4.95 | 149,818 |
| History of Austria | 0 | - | 4.70 | 17,989 |
| Regions of France Map Quiz | 0 | - | 4.97 | 145,765 |
| Geography of the French Empire | 0 | - | 4.45 | 27,226 |
| The French Revolution | 0 | - | 4.47 | 24,160 |
| France Multiple Choice | 0 | - | 4.39 | 40,869 |
| History of France | 0 | - | 4.61 | 57,694 |
| States of Germany Map Quiz | 0 | - | 4.92 | 133,933 |
| Biggest Cities in Germany in 1910 | 0 | - | 4.41 | 23,569 |
| Word Chain - Italy | 0 | - | 4.07 | 23,227 |
| Embarrassing Chapters in Italian History | 0 | - | 4.24 | 12,174 |
| Two Letter Roman Numerals | 0 | - | 4.97 | 56,572 |
| The Vikings! | 0 | - | 4.46 | 28,419 |
| The Portuguese Empire | 0 | - | 4.58 | 12,116 |
| American to British Word Translation | 0 | - | 4.14 | 139,783 |
| Countries and Territories of the United Kingdom | 0 | - | 4.90 | 94,589 |
| Counties of England Map Quiz | 0 | - | 4.97 | 309,209 |
| Champions League Winners | 0 | - | 4.92 | 1,017,364 |
| Top 10 Non-English Languages Spoken in New York City | 0 | - | 4.85 | 66,792 |
| Category Elimination - European Geography #1 | 0 | - | 4.98 | 236,167 |
| European Map without 10 Random Countries | 0 | - | 4.97 | 279,203 |
| Category Elimination - European Geography #2 | 0 | - | 4.99 | 169,133 |
| Departments of France | 0 | - | 4.93 | 55,332 |
| Roman Numeral Decoding Quiz | 0 | - | 4.94 | 440,195 |
| England or Wales? | 0 | - | 4.94 | 46,001 |
| All UEFA Champions League Teams Ever | 0 | - | 4.85 | 132,365 |
| Countries with the Most Arabic Speakers | 0 | - | 4.92 | 80,899 |
| Pre-Euro Currencies | 0 | - | 4.44 | 52,766 |
| European Countries with the Fewest Overnight Visitors | 0 | - | 4.80 | 41,736 |
| Word Scramble - European Countries | 0 | - | 4.73 | 142,409 |
| Top 20 Football Clubs in Europe | 0 | - | 4.48 | 123,482 |
| Slavic Languages | 0 | - | 4.67 | 54,756 |
| Famous French People | 0 | - | 4.05 | 36,139 |
| Word Chain - France | 0 | - | 4.38 | 42,950 |
| Countries Italy Declared War On | 0 | - | 4.74 | 47,658 |
| History of The Netherlands | 0 | - | 4.46 | 17,568 |
| Spanish Immigration by Country | 0 | - | 4.63 | 55,658 |
| Canary Islands | 0 | - | 4.62 | 17,546 |
| Switzerland Immigration by Country | 0 | - | 4.69 | 30,127 |
| British Spellings | 0 | - | 4.06 | 99,621 |
| British Groups of Things | 0 | - | 4.26 | 83,035 |
| British Acronyms | 0 | - | 4.40 | 45,955 |
| United Kingdom Decoder | 0 | - | 4.29 | 40,123 |
| English Monarchs in Order by First Letter | 0 | - | 4.38 | 32,185 |
| Geography of Scotland | 0 | - | 4.63 | 21,770 |
| 100 Longest Rivers in Europe - with a Map | 0 | - | 4.94 | 66,016 |
| Countries With the Most Russian Speakers | 0 | - | 4.97 | 103,125 |
| French Geography Quiz #1 | 0 | - | 4.89 | 35,146 |
| Geography of Germany | 0 | - | 4.35 | 17,319 |
| History of Germany | 0 | - | 4.39 | 52,993 |
| Italian Inventions | 0 | - | 3.81 | 18,482 |
| Ancient Roman Trivia #2 | 0 | - | 4.61 | 44,352 |
| Geography of the Roman Empire | 0 | - | 4.55 | 52,248 |
| Roman Names for Places | 0 | - | 4.62 | 58,763 |
| History of Spain | 0 | - | 4.23 | 21,172 |
| British to American Word Translation | 0 | - | 3.74 | 255,383 |
| British Foods by Description | 0 | - | 3.94 | 48,399 |
| British and American Word Differences | 0 | - | 2.63 | 46,936 |
| British Geography Quiz #2 | 0 | - | 4.30 | 28,245 |
| Bridges of London | 0 | - | 4.17 | 10,149 |
| British Sport Trivia | 0 | - | 4.39 | 20,540 |
| Famous Welsh People | 0 | - | 4.34 | 11,713 |
| History of Russia Quiz | 0 | - | 4.47 | 32,013 |
| Russia Multiple Choice | 0 | - | 4.58 | 40,893 |
| Movies Set in France | 0 | - | 4.26 | 13,157 |
| French Inventions | 0 | - | 4.10 | 13,930 |
| History of Paris | 0 | - | 4.24 | 13,684 |
| Word Chain - Germany | 0 | - | 4.31 | 22,693 |
| The Trojan War | 0 | - | 4.83 | 40,033 |
| Greek Mythology General Knowledge #1 | 0 | - | 4.85 | 113,108 |
| Famous Nordic People | 0 | - | 4.34 | 20,325 |
| Famous Spaniards Quiz | 0 | - | 4.24 | 11,648 |
| Invasions of Great Britain | 0 | - | 4.51 | 60,125 |
| Word Chain - United Kingdom | 0 | - | 4.05 | 29,420 |
| The British Royal Family - Modern Times | 0 | - | 4.16 | 21,583 |
| People on Money - England | 0 | - | 4.29 | 16,647 |
| Name a Valid English City | 0 | - | 4.19 | 16,836 |
| Asian Countries by First 2 Letters | 0 | - | 4.91 | 280,905 |
| African Countries by First 2 Letters | 0 | - | 4.96 | 269,587 |
| Australian Capitals | 0 | - | 4.92 | 62,854 |
| European Geography By Letter - A | 0 | - | 4.52 | 148,317 |
| European Geography By Letter - B #1 | 0 | - | 4.62 | 121,720 |
| European Geography By Letter - C | 0 | - | 4.44 | 124,225 |
| European Geography By Letter - D | 0 | - | 4.49 | 118,608 |
| European Geography By Letter - L | 0 | - | 4.52 | 115,246 |
| European Geography By Letter - M | 0 | - | 4.69 | 132,750 |
| European Geography By Letter - N | 0 | - | 4.44 | 102,266 |
| European Geography By Letter - R | 0 | - | 4.43 | 94,874 |
| European Geography By Letter - V | 0 | - | 4.43 | 94,152 |
| European Geography By Letter - T | 0 | - | 4.41 | 83,760 |
| Europe Map Quiz | 0 | - | 5.00 | 4,791,625 |
| Europe Geography Quiz #1 | 0 | - | 4.55 | 71,555 |
| Europe Geography Quiz #2 | 0 | - | 4.57 | 72,226 |
| Europe Geography Quiz #4 | 0 | - | 4.57 | 70,492 |
| Europe Geography Quiz #5 | 0 | - | 4.55 | 61,453 |
| European Geography By Letter - S #1 | 0 | - | 4.63 | 101,545 |
| Top 10 European Countries by English Proficiency | 0 | - | 4.74 | 66,022 |
| Four Letter European Geography #1 | 0 | - | 4.41 | 28,596 |
| Four Letter European Geography #2 | 0 | - | 4.54 | 20,777 |
| Capitals of French Regions | 0 | - | 4.45 | 16,193 |
| Capitals of German States | 0 | - | 4.74 | 29,088 |
| Chancellors of Germany, 1949–present | 0 | - | 4.60 | 23,574 |
| Olympian Gods Quiz | 0 | - | 4.96 | 504,195 |
| Ancient Greek Words | 0 | - | 4.93 | 112,603 |
| Roman History Vocabulary | 0 | - | 4.41 | 57,736 |
| Seven Hills of Rome | 0 | - | 4.70 | 9,272 |
| Name Every Beatles Song | 0 | - | 4.97 | 238,582 |
| Bohemian Rhapsody Lyrics | 0 | - | 4.98 | 292,937 |
| Oceania Map Quiz | 0 | - | 4.98 | 660,014 |
| European Physical Geography | 0 | - | 4.26 | 33,611 |
| Geography of Russia | 0 | - | 4.57 | 21,614 |
| Slovakia... or Slovenia? | 0 | - | 4.69 | 42,151 |
| Italian History A-Z | 0 | - | 4.16 | 17,949 |
| Serie A Champions | 0 | - | 4.29 | 58,856 |
| The Life of Julius Caesar | 0 | - | 4.39 | 39,192 |
| Sweden Immigration by Country | 0 | - | 4.53 | 56,421 |
| United Kingdom A-Z | 0 | - | 4.51 | 88,411 |
| British Geography Multiple Choice | 0 | - | 4.49 | 43,477 |
| The Thirteen Dwarves in the Hobbit | 0 | - | 4.81 | 28,834 |
| Wives of King Henry VIII | 0 | - | 4.55 | 53,481 |
| Countries the UK Declared War On | 0 | - | 4.55 | 123,340 |
| Geography of the British Empire | 0 | - | 4.48 | 39,862 |
| Champions League Top 4 | 0 | - | 4.78 | 139,428 |
| East Asia Map Quiz | 0 | - | 4.99 | 1,453,145 |
| Asia Map Quiz | 0 | - | 4.99 | 926,243 |
| Japanese Language - Katakana Practice | 0 | - | 4.61 | 33,436 |
| Africa Map Quiz | 0 | - | 5.00 | 2,130,157 |
| Oceanian Capitals - Map Quiz | 0 | - | 4.96 | 51,559 |
| Australia Map Quiz | 0 | - | 4.95 | 346,408 |
| United States Map Quiz | 0 | - | 4.98 | 4,172,922 |
| Top 10 Non-English Languages of Los Angeles | 0 | - | 4.43 | 60,143 |
| Mediterranean Countries Quiz | 0 | - | 4.99 | 214,221 |
| Countries with Territorial Claims in Antarctica | 0 | - | 4.94 | 92,970 |
| Countries That Use the Euro | 0 | - | 4.95 | 107,101 |
| Europe Cities Map Quiz | 0 | - | 4.99 | 366,469 |
| European Geography By Letter - E | 0 | - | 4.23 | 115,375 |
| European Geography By Letter - F | 0 | - | 4.15 | 94,627 |
| European Geography By Letter - H | 0 | - | 4.30 | 97,330 |
| European Geography By Letter - G | 0 | - | 4.27 | 104,101 |
| European Geography By Letter - I | 0 | - | 4.07 | 96,685 |
| European Geography By Letter - K | 0 | - | 4.15 | 71,327 |
| European Geography By Letter - O | 0 | - | 4.29 | 63,710 |
| European Geography by Letter - W | 0 | - | 4.21 | 83,683 |
