| European Countries by First 2 Letters | 0 | - | 4.95 | 533,299 |
| Most Guessed Cities in Europe - Not Capitals | 0 | - | 4.83 | 88,184 |
| European Geography By Letter - P #1 | 0 | - | 4.81 | 99,301 |
| European Geography By Letter - B #2 | 0 | - | 4.87 | 89,383 |
| Category Elimination - European Geography #3 | 0 | - | 4.86 | 82,250 |
| Count to 10 in Europe: Pro | 0 | - | 4.86 | 69,896 |
| Official European Union Languages | 0 | - | 4.97 | 240,484 |
| European Countries in their Native Language | 0 | - | 4.99 | 158,899 |
| Europe by Borders in 30 Seconds | 0 | - | 4.98 | 431,620 |
| Pre-Euro Currencies | 0 | - | 4.44 | 52,816 |
| Slavic Languages | 0 | - | 4.67 | 54,812 |
| Europe Geography Decoder | 0 | - | 4.87 | 70,415 |
| Countries that Beat Switzerland | 0 | - | 4.88 | 42,125 |
| History of Russia Quiz | 0 | - | 4.47 | 32,033 |
| Russia Multiple Choice | 0 | - | 4.58 | 40,917 |
| Celtic Nations | 0 | - | 4.61 | 47,131 |
| Countries of Europe with an Empty Map | 0 | - | 5.00 | 313,375 |
| All First-Level Subdivisions of Europe on a Map | 0 | - | 4.99 | 176,831 |
| Countries with Territory in the Balkans | 0 | - | 4.96 | 90,458 |
| Eastern Europe Map Quiz | 0 | - | 4.91 | 128,972 |
| Slavic Countries | 0 | - | 4.96 | 112,579 |
| Germany Multiple Choice | 0 | - | 4.84 | 54,777 |
| States of the German Confederation in 1848 | 0 | - | 4.90 | 32,539 |
| "Big Five" European Soccer Champions Since 2000 | 0 | - | 4.97 | 363,149 |
| Add A Letter - Make a European City | 0 | - | 4.88 | 23,544 |
| European Geography By Letter - A | 0 | - | 4.52 | 148,592 |
| European Geography By Letter - B #1 | 0 | - | 4.62 | 122,039 |
| European Geography By Letter - C | 0 | - | 4.44 | 124,605 |
| European Geography By Letter - D | 0 | - | 4.49 | 119,160 |
| European Geography By Letter - L | 0 | - | 4.52 | 115,534 |
| European Geography By Letter - M | 0 | - | 4.70 | 133,070 |
| European Geography By Letter - N | 0 | - | 4.44 | 102,453 |
| European Geography By Letter - R | 0 | - | 4.43 | 95,028 |
| European Geography By Letter - V | 0 | - | 4.43 | 94,293 |
| European Geography By Letter - T | 0 | - | 4.41 | 83,934 |
| European Geography By Letter - S #1 | 0 | - | 4.63 | 101,675 |
| Famous Germans | 0 | - | 4.50 | 55,904 |
| Famous Italians by Clue | 0 | - | 4.45 | 90,591 |
| U.S. Citizenship Test Questions | 0 | - | 4.83 | 241,049 |
| Catholic Countries in Europe | 0 | - | 4.83 | 95,945 |
| Biggest Countries in Europe in 1700 | 0 | - | 4.74 | 58,847 |
| Federal Subjects of Russia | 0 | - | 4.95 | 150,071 |
| Geography of Russia | 0 | - | 4.57 | 21,630 |
| Countries Formerly in Yugoslavia | 0 | - | 4.95 | 125,636 |
| States of Germany | 0 | - | 4.95 | 155,077 |
| Germany Immigration by Country | 0 | - | 4.86 | 81,872 |
| Regions of Italy | 0 | - | 4.92 | 77,342 |
| Netherlands Immigration by Country | 0 | - | 4.93 | 52,979 |
| Regions of Spain Quiz | 0 | - | 4.91 | 115,698 |
| Cantons of Switzerland | 0 | - | 4.98 | 51,974 |
| United Kingdom A-Z | 0 | - | 4.51 | 88,509 |
| 10 Closest Megacities to London | 0 | - | 4.90 | 17,879 |
| Champions League Winners | 0 | - | 4.92 | 1,018,876 |
| Asian Geography By Letter - B | 0 | - | 4.85 | 67,189 |
| Category Elimination - European Geography #1 | 0 | - | 4.98 | 236,545 |
| European Map without 10 Random Countries | 0 | - | 4.97 | 279,494 |
| Category Elimination - European Geography #2 | 0 | - | 4.99 | 169,425 |
| Departments of France | 0 | - | 4.93 | 55,497 |
| Countries Surrounding Rome | 0 | - | 4.97 | 49,801 |
| England or Wales? | 0 | - | 4.94 | 46,108 |
| All UEFA Champions League Teams Ever | 0 | - | 4.85 | 132,636 |
| European Geography By Letter - E | 0 | - | 4.25 | 122,941 |
| European Geography By Letter - F | 0 | - | 4.15 | 94,925 |
| European Geography By Letter - H | 0 | - | 4.30 | 97,568 |
| European Geography By Letter - G | 0 | - | 4.27 | 104,369 |
| European Geography By Letter - I | 0 | - | 4.07 | 96,887 |
| European Geography By Letter - K | 0 | - | 4.15 | 71,540 |
| European Geography By Letter - O | 0 | - | 4.29 | 63,866 |
| European Geography by Letter - W | 0 | - | 4.21 | 83,779 |
| European Geography By Letter - S #2 | 0 | - | 4.20 | 52,097 |
| European Geography A-Z | 0 | - | 4.29 | 49,544 |
| European Countries with the Fewest Overnight Visitors | 0 | - | 4.80 | 41,744 |
| Word Scramble - European Countries | 0 | - | 4.72 | 142,515 |
| Top 20 Football Clubs in Europe | 0 | - | 4.48 | 124,777 |
| Famous French People | 0 | - | 4.05 | 36,203 |
| Capitals of Italian Regions | 0 | - | 4.62 | 36,765 |
| The Mafia Quiz | 0 | - | 4.46 | 23,458 |
| History of The Netherlands | 0 | - | 4.46 | 17,582 |
| Spanish Immigration by Country | 0 | - | 4.63 | 55,673 |
| English Monarchs in Order by First Letter | 0 | - | 4.38 | 32,242 |
| Name a Major European City A-Z | 0 | - | 4.33 | 49,960 |
| 100 Longest Rivers in Europe - with a Map | 0 | - | 4.94 | 66,098 |
| French Geography Quiz #1 | 0 | - | 4.89 | 35,327 |
| Famous Swiss and Austrian People | 0 | - | 4.45 | 14,690 |
| Famous Dutch and Belgian People | 0 | - | 4.56 | 18,172 |
| France A-Z | 0 | - | 4.16 | 38,371 |
| Letters of the Greek Alphabet | 0 | - | 4.97 | 653,463 |
| Name that Greek Letter | 0 | - | 4.93 | 325,438 |
| Switzerland A-Z | 0 | - | 4.45 | 25,805 |
| Top European Languages on a Map | 0 | - | 4.77 | 133,068 |
| Famous Russians | 0 | - | 4.16 | 23,938 |
| Word Chain - Russia | 0 | - | 4.33 | 15,811 |
| Russian History A-Z | 0 | - | 4.35 | 32,335 |
| Ancient Greece A-Z | 0 | - | 4.60 | 23,264 |
| The Trojan War | 0 | - | 4.83 | 40,129 |
| Greek Mythology General Knowledge #1 | 0 | - | 4.85 | 113,377 |
| Famous Irish People | 0 | - | 4.05 | 46,087 |
| History of Italy | 0 | - | 4.55 | 32,201 |
| Italy Multiple Choice | 0 | - | 4.74 | 104,588 |
| Ancient Roman Trivia #1 | 0 | - | 4.85 | 85,740 |
| Roman Emperors | 0 | - | 4.95 | 121,543 |
| Geography of the Dutch Empire | 0 | - | 4.62 | 34,868 |
| Famous Nordic People | 0 | - | 4.34 | 20,364 |
| Famous Spaniards Quiz | 0 | - | 4.24 | 11,652 |
| Countries of the Spanish Empire | 0 | - | 4.52 | 77,485 |
| The British Royal Family - Modern Times | 0 | - | 4.16 | 21,587 |
| People on Money - England | 0 | - | 4.30 | 21,358 |
| London A-Z | 0 | - | 4.10 | 40,921 |
| Asian Cities A-Z by Clue | 0 | - | 4.52 | 43,117 |
| Asian Countries by First 2 Letters | 0 | - | 4.91 | 281,157 |
| Africa A-Z | 0 | - | 4.57 | 46,813 |
| African Countries by First 2 Letters | 0 | - | 4.96 | 269,777 |
| 100 Most Common English Words | 0 | - | 4.88 | 1,328,506 |
| Australian Capitals | 0 | - | 4.92 | 62,887 |
| Major non-NATO U.S. Allies | 0 | - | 4.52 | 52,620 |
| Europe Map Quiz | 0 | - | 5.00 | 4,795,721 |
| Europe Geography Quiz #1 | 0 | - | 4.54 | 71,598 |
| Europe Geography Quiz #2 | 0 | - | 4.57 | 72,270 |
| Europe Geography Quiz #4 | 0 | - | 4.57 | 70,540 |
| Europe Geography Quiz #5 | 0 | - | 4.55 | 61,494 |
| Four Letter European Geography #1 | 0 | - | 4.41 | 28,650 |
| Capitals of French Regions | 0 | - | 4.45 | 16,218 |
| Regions of France | 0 | - | 4.70 | 122,537 |
| France Immigration by Country | 0 | - | 4.70 | 77,048 |
| German Groups of Things | 0 | - | 4.47 | 38,685 |
| Capitals of German States | 0 | - | 4.74 | 29,103 |
| Chancellors of Germany, 1949–present | 0 | - | 4.60 | 23,606 |
| Germany True or False? | 0 | - | 4.61 | 49,095 |
| Largest Islands of Greece | 0 | - | 4.59 | 48,624 |
| Olympian Gods Quiz | 0 | - | 4.96 | 504,779 |
| Ancient Greek Words | 0 | - | 4.93 | 112,747 |
| Provinces of the Netherlands | 0 | - | 4.80 | 41,989 |
| 100 Greatest Britons Quiz | 0 | - | 4.41 | 48,521 |
| Foods in a Full English Breakfast | 0 | - | 4.46 | 104,004 |
| Name Every Beatles Song | 0 | - | 4.97 | 238,976 |
| Bohemian Rhapsody Lyrics | 0 | - | 4.98 | 293,075 |
| Famous Scottish People | 0 | - | 4.22 | 18,446 |
| Asian Geography By Letter - A | 0 | - | 4.64 | 71,570 |
| Asian Geography by Letter - H | 0 | - | 4.50 | 66,184 |
| Asian Geography By Letter - M | 0 | - | 4.48 | 61,750 |
| Asian Geography by Letter - P | 0 | - | 4.45 | 58,316 |
| Asian Geography by Letter - T | 0 | - | 4.52 | 57,753 |
| Asian Geography By Letter - L | 0 | - | 4.49 | 43,425 |
| Asian Geography By Letter - O | 0 | - | 4.66 | 32,439 |
| Middle East A-Z | 0 | - | 4.47 | 46,285 |
| Most Common English Verbs - Extreme | 0 | - | 4.96 | 158,900 |
| Oceania Map Quiz | 0 | - | 4.98 | 660,894 |
| Canada A-Z | 0 | - | 4.73 | 33,006 |
| European Physical Geography | 0 | - | 4.26 | 33,625 |
| Slovakia... or Slovenia? | 0 | - | 4.69 | 42,184 |
| History of Austria | 0 | - | 4.70 | 17,995 |
| Geography of the French Empire | 0 | - | 4.45 | 27,243 |
| The French Revolution | 0 | - | 4.47 | 24,176 |
| France Multiple Choice | 0 | - | 4.39 | 40,881 |
| History of France | 0 | - | 4.61 | 57,778 |
| Biggest Cities in Germany in 1910 | 0 | - | 4.41 | 23,582 |
| Roman Numeral Decoding Quiz | 0 | - | 4.94 | 440,729 |
| Two Letter Roman Numerals | 0 | - | 4.97 | 56,664 |
| The Vikings! | 0 | - | 4.46 | 28,434 |
| Sweden Immigration by Country | 0 | - | 4.53 | 56,462 |
| The Portuguese Empire | 0 | - | 4.58 | 12,120 |
| American to British Word Translation | 0 | - | 4.14 | 139,890 |
| Languages of the United Kingdom | 0 | - | 4.14 | 41,103 |
| The Thirteen Dwarves in the Hobbit | 0 | - | 4.81 | 28,864 |
| Champions League Top 4 | 0 | - | 4.78 | 139,784 |
| East Asia Map Quiz | 0 | - | 4.99 | 1,453,814 |
| Asia Map Quiz | 0 | - | 4.99 | 927,343 |
| A Quiz About Islam | 0 | - | 4.32 | 48,674 |
| Countries That Don't Recognize Israel | 0 | - | 4.68 | 35,259 |
| Africa Map Quiz | 0 | - | 5.00 | 2,131,623 |
| Oceanian Capitals - Map Quiz | 0 | - | 4.96 | 51,669 |
| Australia Map Quiz | 0 | - | 4.95 | 346,657 |
| U.S. Geography by Letter - B | 0 | - | 4.54 | 70,187 |
| U.S. Geography by Letter - S | 0 | - | 4.55 | 58,657 |
| U.S. Federal Holidays | 0 | - | 4.33 | 99,660 |
| United States Map Quiz | 0 | - | 4.98 | 4,174,521 |
| Two Letter U.S. State Abbreviations | 0 | - | 4.19 | 750,604 |
| Mediterranean Countries Quiz | 0 | - | 4.99 | 214,540 |
| Countries with Territorial Claims in Antarctica | 0 | - | 4.94 | 93,014 |
| Countries That Use the Euro | 0 | - | 4.95 | 107,417 |
| Europe Cities Map Quiz | 0 | - | 4.99 | 366,743 |
| Europe Geography Quiz #3 | 0 | - | 4.35 | 63,967 |
| 10 Easternmost Countries in Europe | 0 | - | 4.87 | 117,638 |
| Country Codes of Europe | 0 | - | 3.45 | 13,857 |
| The Only European Country ... | 0 | - | 4.91 | 219,822 |
| European Countries NOT in NATO | 0 | - | 4.91 | 62,952 |
| Embarrassing Chapters in Russian History | 0 | - | 3.68 | 20,377 |
| Austria... or Australia? | 0 | - | 4.67 | 104,886 |
| Presidents of France | 0 | - | 4.25 | 24,389 |
| Word Chain - France | 0 | - | 4.38 | 42,979 |
| Ancient Greek Trivia | 0 | - | 4.62 | 67,306 |
| Geography of Ancient Greece | 0 | - | 4.69 | 32,081 |
| Figures from Greek Mythology | 0 | - | 4.92 | 194,752 |
| Italian Foods | 0 | - | 4.30 | 73,439 |
| Countries Italy Declared War On | 0 | - | 4.77 | 50,753 |
| Kings of Spain Quiz | 0 | - | 4.14 | 14,139 |
| Canary Islands | 0 | - | 4.62 | 17,553 |
| Switzerland Immigration by Country | 0 | - | 4.69 | 30,194 |
| British Spellings | 0 | - | 4.06 | 99,645 |
| British Groups of Things | 0 | - | 4.26 | 83,055 |
