| European Countries by First 2 Letters | 0 | - | 4.95 | 529,696 |
| Most Guessed Cities in Europe - Not Capitals | 0 | - | 4.82 | 87,396 |
| Countries with the Most Skyscrapers | 0 | - | 4.93 | 144,143 |
| U.S. Cities with the Most Skyscrapers | 0 | - | 4.89 | 95,569 |
| Countries with the Tallest Buildings | 0 | - | 4.93 | 104,413 |
| European Geography By Letter - B #2 | 0 | - | 4.84 | 78,668 |
| Category Elimination - European Geography #3 | 0 | - | 4.86 | 81,029 |
| Count to 10 in Europe: Pro | 0 | - | 4.86 | 69,176 |
| Official European Union Languages | 0 | - | 4.97 | 238,580 |
| European Countries in their Native Language | 0 | - | 4.99 | 157,906 |
| Europe by Borders in 30 Seconds | 0 | - | 4.98 | 428,329 |
| Pre-Euro Currencies | 0 | - | 4.44 | 52,607 |
| Europe Geography Decoder | 0 | - | 4.86 | 70,002 |
| Countries that Beat Switzerland | 0 | - | 4.88 | 41,852 |
| Tall Building Cities - United States | 0 | - | 4.48 | 68,403 |
| Add A Letter - Make a European City | 0 | - | 4.90 | 23,389 |
| Celtic Nations | 0 | - | 4.69 | 46,957 |
| Countries of Europe with an Empty Map | 0 | - | 5.00 | 310,696 |
| All First-Level Subdivisions of Europe on a Map | 0 | - | 4.98 | 172,041 |
| Germany Multiple Choice | 0 | - | 4.84 | 54,370 |
| States of the German Confederation in 1848 | 0 | - | 4.89 | 32,030 |
| "Big Five" European Soccer Champions Since 2000 | 0 | - | 4.97 | 356,277 |
| European Geography By Letter - A | 0 | - | 4.52 | 146,381 |
| European Geography By Letter - B #1 | 0 | - | 4.67 | 119,563 |
| European Geography By Letter - C | 0 | - | 4.46 | 114,102 |
| European Geography By Letter - D | 0 | - | 4.50 | 108,729 |
| European Geography By Letter - L | 0 | - | 4.52 | 113,598 |
| European Geography By Letter - M | 0 | - | 4.67 | 130,761 |
| European Geography By Letter - P #1 | 0 | - | 4.80 | 97,613 |
| European Geography By Letter - N | 0 | - | 4.44 | 100,918 |
| European Geography By Letter - R | 0 | - | 4.42 | 93,766 |
| European Geography By Letter - V | 0 | - | 4.43 | 93,058 |
| European Geography By Letter - T | 0 | - | 4.41 | 82,505 |
| European Geography By Letter - S #1 | 0 | - | 4.63 | 100,657 |
| Famous Germans | 0 | - | 4.50 | 55,311 |
| Famous Italians by Clue | 0 | - | 4.45 | 89,530 |
| U.S. Citizenship Test Questions | 0 | - | 4.83 | 239,505 |
| Catholic Countries in Europe | 0 | - | 4.83 | 95,174 |
| Biggest Countries in Europe in 1700 | 0 | - | 4.73 | 58,507 |
| Federal Subjects of Russia | 0 | - | 4.95 | 147,443 |
| States of Germany | 0 | - | 4.95 | 152,706 |
| Germany Immigration by Country | 0 | - | 4.85 | 81,080 |
| Regions of Italy | 0 | - | 4.92 | 75,941 |
| Netherlands Immigration by Country | 0 | - | 4.93 | 52,217 |
| Regions of Spain Quiz | 0 | - | 4.90 | 114,034 |
| Cantons of Switzerland | 0 | - | 4.98 | 51,245 |
| United Kingdom A-Z | 0 | - | 4.52 | 88,053 |
| 10 Closest Megacities to London | 0 | - | 4.90 | 17,711 |
| Champions League Winners | 0 | - | 4.92 | 1,007,206 |
| Asian Geography By Letter - B | 0 | - | 4.85 | 66,533 |
| Cities with the Tallest Buildings | 0 | - | 4.17 | 84,568 |
| Category Elimination - European Geography #1 | 0 | - | 4.98 | 233,389 |
| European Map without 10 Random Countries | 0 | - | 4.97 | 276,938 |
| Category Elimination - European Geography #2 | 0 | - | 4.99 | 167,203 |
| Departments of France | 0 | - | 4.93 | 54,185 |
| Countries Surrounding Rome | 0 | - | 4.97 | 49,559 |
| England or Wales? | 0 | - | 4.94 | 45,716 |
| All UEFA Champions League Teams Ever | 0 | - | 4.85 | 130,448 |
| European Geography By Letter - E | 0 | - | 4.23 | 113,846 |
| European Geography By Letter - F | 0 | - | 4.17 | 93,009 |
| European Geography By Letter - H | 0 | - | 4.30 | 96,126 |
| European Geography By Letter - G | 0 | - | 4.27 | 102,800 |
| European Geography By Letter - I | 0 | - | 4.10 | 95,604 |
| European Geography By Letter - K | 0 | - | 4.14 | 70,242 |
| European Geography By Letter - O | 0 | - | 4.28 | 62,794 |
| European Geography by Letter - W | 0 | - | 4.20 | 82,968 |
| European Geography By Letter - S #2 | 0 | - | 4.19 | 51,244 |
| European Geography A-Z | 0 | - | 4.29 | 49,280 |
| European Countries with the Fewest Overnight Visitors | 0 | - | 4.80 | 41,660 |
| Word Scramble - European Countries | 0 | - | 4.73 | 141,727 |
| Top 20 Football Clubs in Europe | 0 | - | 4.48 | 115,054 |
| Slavic Languages | 0 | - | 4.68 | 54,382 |
| Famous French People | 0 | - | 4.07 | 35,621 |
| Capitals of Italian Regions | 0 | - | 4.62 | 36,625 |
| The Mafia Quiz | 0 | - | 4.46 | 23,329 |
| History of The Netherlands | 0 | - | 4.46 | 17,439 |
| Spanish Immigration by Country | 0 | - | 4.63 | 55,480 |
| English Monarchs in Order by First Letter | 0 | - | 4.38 | 31,829 |
| Name a Major European City A-Z | 0 | - | 4.33 | 49,534 |
| 100 Longest Rivers in Europe - with a Map | 0 | - | 4.94 | 65,477 |
| French Geography Quiz #1 | 0 | - | 4.89 | 34,782 |
| Famous Swiss and Austrian People | 0 | - | 4.45 | 14,629 |
| Famous Dutch and Belgian People | 0 | - | 4.56 | 18,066 |
| France A-Z | 0 | - | 4.16 | 38,213 |
| Letters of the Greek Alphabet | 0 | - | 4.97 | 647,709 |
| Name that Greek Letter | 0 | - | 4.93 | 323,562 |
| Switzerland A-Z | 0 | - | 4.45 | 25,650 |
| Africa A-Z | 0 | - | 4.57 | 46,616 |
| African Countries by First 2 Letters | 0 | - | 4.96 | 268,281 |
| Top European Languages on a Map | 0 | - | 4.77 | 132,128 |
| Famous Russians | 0 | - | 4.16 | 23,843 |
| History of Russia Quiz | 0 | - | 4.47 | 31,923 |
| Russia Multiple Choice | 0 | - | 4.58 | 40,738 |
| Russian History A-Z | 0 | - | 4.38 | 31,743 |
| Ancient Greece A-Z | 0 | - | 4.60 | 23,149 |
| The Trojan War | 0 | - | 4.83 | 39,740 |
| Greek Mythology General Knowledge #1 | 0 | - | 4.85 | 111,907 |
| Famous Irish People | 0 | - | 4.05 | 46,000 |
| History of Italy | 0 | - | 4.55 | 31,981 |
| Italy Multiple Choice | 0 | - | 4.74 | 103,812 |
| Ancient Roman Trivia #1 | 0 | - | 4.85 | 84,553 |
| Roman Emperors | 0 | - | 4.95 | 120,109 |
| Geography of the Dutch Empire | 0 | - | 4.62 | 34,669 |
| Famous Nordic People | 0 | - | 4.34 | 20,133 |
| Famous Spaniards Quiz | 0 | - | 4.24 | 11,615 |
| Countries of the Spanish Empire | 0 | - | 4.52 | 77,242 |
| The British Royal Family - Modern Times | 0 | - | 4.16 | 21,533 |
| People on Money - England | 0 | - | 4.29 | 16,616 |
| London A-Z | 0 | - | 4.10 | 40,782 |
| Asian Cities A-Z by Clue | 0 | - | 4.49 | 35,605 |
| Asian Countries by First 2 Letters | 0 | - | 4.91 | 279,242 |
| Countries with the Most Skyscrapers per Capita | 0 | - | 4.69 | 72,525 |
| 100 Most Common English Words | 0 | - | 4.88 | 1,317,328 |
| Australian Capitals | 0 | - | 4.92 | 62,729 |
| Major non-NATO U.S. Allies | 0 | - | 4.52 | 52,202 |
| Europe Map Quiz | 0 | - | 5.00 | 4,764,345 |
| Europe Geography Quiz #1 | 0 | - | 4.55 | 71,289 |
| Europe Geography Quiz #2 | 0 | - | 4.57 | 71,957 |
| Europe Geography Quiz #4 | 0 | - | 4.57 | 70,239 |
| Europe Geography Quiz #5 | 0 | - | 4.55 | 61,245 |
| Capitals of French Regions | 0 | - | 4.45 | 16,081 |
| Regions of France | 0 | - | 4.72 | 120,883 |
| France Immigration by Country | 0 | - | 4.70 | 76,546 |
| German Groups of Things | 0 | - | 4.46 | 38,483 |
| Capitals of German States | 0 | - | 4.74 | 28,964 |
| Chancellors of Germany, 1949–present | 0 | - | 4.60 | 23,348 |
| Germany True or False? | 0 | - | 4.61 | 48,820 |
| Largest Islands of Greece | 0 | - | 4.59 | 48,046 |
| Olympian Gods Quiz | 0 | - | 4.96 | 501,023 |
| Ancient Greek Words | 0 | - | 4.93 | 111,652 |
| Provinces of the Netherlands | 0 | - | 4.80 | 41,395 |
| 100 Greatest Britons Quiz | 0 | - | 4.41 | 48,279 |
| Foods in a Full English Breakfast | 0 | - | 4.46 | 103,282 |
| Name Every Beatles Song | 0 | - | 4.97 | 236,391 |
| Bohemian Rhapsody Lyrics | 0 | - | 4.98 | 291,782 |
| Famous Scottish People | 0 | - | 4.22 | 18,400 |
| Asian Geography By Letter - A | 0 | - | 4.64 | 71,151 |
| Asian Geography by Letter - H | 0 | - | 4.50 | 65,715 |
| Asian Geography By Letter - M | 0 | - | 4.47 | 61,428 |
| Asian Geography by Letter - P | 0 | - | 4.45 | 57,931 |
| Asian Geography by Letter - T | 0 | - | 4.51 | 57,384 |
| Asian Geography By Letter - L | 0 | - | 4.49 | 43,048 |
| Asian Geography By Letter - O | 0 | - | 4.65 | 31,901 |
| Middle East A-Z | 0 | - | 4.47 | 46,030 |
| Most Common English Verbs - Extreme | 0 | - | 4.96 | 157,292 |
| Africa Map Quiz | 0 | - | 5.00 | 2,118,475 |
| Oceania Map Quiz | 0 | - | 4.98 | 642,619 |
| Canada A-Z | 0 | - | 4.73 | 32,843 |
| European Physical Geography | 0 | - | 4.26 | 33,519 |
| Geography of Russia | 0 | - | 4.57 | 21,538 |
| Slovakia... or Slovenia? | 0 | - | 4.69 | 41,972 |
| History of Austria | 0 | - | 4.70 | 17,866 |
| Geography of the French Empire | 0 | - | 4.45 | 27,068 |
| The French Revolution | 0 | - | 4.47 | 23,956 |
| France Multiple Choice | 0 | - | 4.39 | 40,746 |
| History of France | 0 | - | 4.59 | 57,014 |
| Roman Numeral Decoding Quiz | 0 | - | 4.94 | 437,289 |
| Two Letter Roman Numerals | 0 | - | 4.97 | 56,165 |
| The Vikings! | 0 | - | 4.46 | 28,348 |
| Sweden Immigration by Country | 0 | - | 4.55 | 56,147 |
| The Portuguese Empire | 0 | - | 4.58 | 12,067 |
| American to British Word Translation | 0 | - | 4.14 | 139,108 |
| Languages of the United Kingdom | 0 | - | 4.13 | 40,907 |
| The Thirteen Dwarves in the Hobbit | 0 | - | 4.81 | 28,675 |
| Champions League Top 4 | 0 | - | 4.77 | 136,592 |
| East Asia Map Quiz | 0 | - | 4.99 | 1,448,480 |
| Asia Map Quiz | 0 | - | 4.99 | 917,247 |
| A Quiz About Islam | 0 | - | 4.31 | 48,453 |
| Countries That Don't Recognize Israel | 0 | - | 4.68 | 34,872 |
| Countries of Africa | 0 | - | 5.00 | 2,538,384 |
| Landlocked Countries in Africa | 0 | - | 4.99 | 46,876 |
| African East Coast | 0 | - | 4.96 | 96,102 |
| Western Africa Map Quiz | 0 | - | 4.97 | 73,950 |
| Oceanian Capitals - Map Quiz | 0 | - | 4.95 | 50,743 |
| Australia Map Quiz | 0 | - | 4.95 | 344,704 |
| U.S. Geography by Letter - B | 0 | - | 4.53 | 69,434 |
| U.S. Geography by Letter - S | 0 | - | 4.55 | 52,879 |
| U.S. Federal Holidays | 0 | - | 4.33 | 99,466 |
| United States Map Quiz | 0 | - | 4.98 | 4,159,097 |
| Two Letter U.S. State Abbreviations | 0 | - | 4.19 | 747,306 |
| Mediterranean Countries Quiz | 0 | - | 4.99 | 212,359 |
| Countries with Territorial Claims in Antarctica | 0 | - | 4.94 | 92,667 |
| Countries That Use the Euro | 0 | - | 4.95 | 105,128 |
| Europe Cities Map Quiz | 0 | - | 4.99 | 364,576 |
| Europe Geography Quiz #3 | 0 | - | 4.35 | 63,687 |
| 10 Easternmost Countries in Europe | 0 | - | 4.89 | 115,333 |
| Country Codes of Europe | 0 | - | 3.43 | 13,738 |
| The Only European Country ... | 0 | - | 4.91 | 216,776 |
| European Countries NOT in NATO | 0 | - | 4.90 | 61,214 |
| Four Letter European Geography #1 | 0 | - | 4.40 | 28,182 |
| Austria... or Australia? | 0 | - | 4.68 | 104,370 |
| Presidents of France | 0 | - | 4.25 | 24,151 |
| Word Chain - France | 0 | - | 4.38 | 42,787 |
| Ancient Greek Trivia | 0 | - | 4.62 | 67,011 |
| Geography of Ancient Greece | 0 | - | 4.69 | 31,920 |
| Figures from Greek Mythology | 0 | - | 4.91 | 187,055 |
| Italian Foods | 0 | - | 4.30 | 72,807 |
| Countries Italy Declared War On | 0 | - | 4.75 | 43,344 |
| Kings of Spain Quiz | 0 | - | 4.14 | 14,050 |
| Canary Islands | 0 | - | 4.62 | 17,483 |
