| European Countries by First 2 Letters | 0 | - | 4.95 | 532,719 |
| Most Guessed Cities in Europe - Not Capitals | 0 | - | 4.83 | 88,072 |
| Countries with the Most Skyscrapers | 0 | - | 4.93 | 144,765 |
| U.S. Cities with the Most Skyscrapers | 0 | - | 4.89 | 95,804 |
| Countries with the Tallest Buildings | 0 | - | 4.93 | 104,937 |
| Save Europeans by Guessing Countries | 0 | - | 4.86 | 217,019 |
| European Geography By Letter - P #1 | 0 | - | 4.81 | 99,043 |
| European Geography By Letter - B #2 | 0 | - | 4.87 | 88,977 |
| Category Elimination - European Geography #3 | 0 | - | 4.86 | 82,042 |
| Count to 10 in Europe: Pro | 0 | - | 4.86 | 69,788 |
| Official European Union Languages | 0 | - | 4.97 | 239,900 |
| European Countries in their Native Language | 0 | - | 4.99 | 158,721 |
| Europe by Borders in 30 Seconds | 0 | - | 4.98 | 431,104 |
| Pre-Euro Currencies | 0 | - | 4.44 | 52,755 |
| Europe Geography Decoder | 0 | - | 4.87 | 70,342 |
| Countries that Beat Switzerland | 0 | - | 4.88 | 42,071 |
| Tall Building Cities - United States | 0 | - | 4.48 | 68,509 |
| Add A Letter - Make a European City | 0 | - | 4.90 | 23,516 |
| Celtic Nations | 0 | - | 4.61 | 47,109 |
| Countries of Europe with an Empty Map | 0 | - | 5.00 | 312,920 |
| All First-Level Subdivisions of Europe on a Map | 0 | - | 4.99 | 176,107 |
| Germany Multiple Choice | 0 | - | 4.84 | 54,713 |
| States of the German Confederation in 1848 | 0 | - | 4.90 | 32,483 |
| "Big Five" European Soccer Champions Since 2000 | 0 | - | 4.97 | 362,065 |
| European Geography By Letter - A | 0 | - | 4.52 | 148,285 |
| European Geography By Letter - B #1 | 0 | - | 4.62 | 121,687 |
| European Geography By Letter - C | 0 | - | 4.44 | 124,165 |
| European Geography By Letter - D | 0 | - | 4.49 | 118,417 |
| European Geography By Letter - L | 0 | - | 4.52 | 115,211 |
| European Geography By Letter - M | 0 | - | 4.69 | 132,697 |
| European Geography By Letter - N | 0 | - | 4.44 | 102,239 |
| European Geography By Letter - R | 0 | - | 4.43 | 94,856 |
| European Geography By Letter - V | 0 | - | 4.43 | 94,138 |
| European Geography By Letter - T | 0 | - | 4.41 | 83,729 |
| European Geography By Letter - S #1 | 0 | - | 4.63 | 101,530 |
| Famous Germans | 0 | - | 4.50 | 55,817 |
| Famous Italians by Clue | 0 | - | 4.45 | 90,460 |
| U.S. Citizenship Test Questions | 0 | - | 4.83 | 240,881 |
| Catholic Countries in Europe | 0 | - | 4.83 | 95,825 |
| Biggest Countries in Europe in 1700 | 0 | - | 4.73 | 58,772 |
| Federal Subjects of Russia | 0 | - | 4.95 | 149,696 |
| States of Germany | 0 | - | 4.95 | 154,687 |
| Germany Immigration by Country | 0 | - | 4.86 | 81,737 |
| Regions of Italy | 0 | - | 4.92 | 77,158 |
| Netherlands Immigration by Country | 0 | - | 4.93 | 52,843 |
| Regions of Spain Quiz | 0 | - | 4.90 | 115,435 |
| Cantons of Switzerland | 0 | - | 4.98 | 51,817 |
| United Kingdom A-Z | 0 | - | 4.51 | 88,394 |
| 10 Closest Megacities to London | 0 | - | 4.90 | 17,847 |
| Champions League Winners | 0 | - | 4.92 | 1,016,872 |
| Asian Geography By Letter - B | 0 | - | 4.85 | 67,075 |
| Cities with the Tallest Buildings | 0 | - | 4.17 | 84,763 |
| Category Elimination - European Geography #1 | 0 | - | 4.98 | 236,053 |
| European Map without 10 Random Countries | 0 | - | 4.97 | 279,067 |
| Category Elimination - European Geography #2 | 0 | - | 4.99 | 169,054 |
| Departments of France | 0 | - | 4.93 | 55,247 |
| Countries Surrounding Rome | 0 | - | 4.97 | 49,754 |
| England or Wales? | 0 | - | 4.94 | 45,990 |
| All UEFA Champions League Teams Ever | 0 | - | 4.85 | 132,275 |
| European Geography By Letter - E | 0 | - | 4.23 | 115,343 |
| European Geography By Letter - F | 0 | - | 4.15 | 94,600 |
| European Geography By Letter - H | 0 | - | 4.30 | 97,306 |
| European Geography By Letter - G | 0 | - | 4.27 | 104,074 |
| European Geography By Letter - I | 0 | - | 4.07 | 96,666 |
| European Geography By Letter - K | 0 | - | 4.15 | 71,305 |
| European Geography By Letter - O | 0 | - | 4.29 | 63,692 |
| European Geography by Letter - W | 0 | - | 4.21 | 83,670 |
| European Geography By Letter - S #2 | 0 | - | 4.20 | 51,972 |
| European Geography A-Z | 0 | - | 4.29 | 49,497 |
| European Countries with the Fewest Overnight Visitors | 0 | - | 4.80 | 41,724 |
| Word Scramble - European Countries | 0 | - | 4.73 | 142,372 |
| Top 20 Football Clubs in Europe | 0 | - | 4.48 | 122,903 |
| Slavic Languages | 0 | - | 4.67 | 54,721 |
| Famous French People | 0 | - | 4.05 | 36,126 |
| Capitals of Italian Regions | 0 | - | 4.62 | 36,749 |
| The Mafia Quiz | 0 | - | 4.46 | 23,443 |
| History of The Netherlands | 0 | - | 4.46 | 17,562 |
| Spanish Immigration by Country | 0 | - | 4.63 | 55,647 |
| English Monarchs in Order by First Letter | 0 | - | 4.38 | 32,167 |
| Name a Major European City A-Z | 0 | - | 4.33 | 49,876 |
| 100 Longest Rivers in Europe - with a Map | 0 | - | 4.94 | 65,989 |
| French Geography Quiz #1 | 0 | - | 4.89 | 35,106 |
| Famous Swiss and Austrian People | 0 | - | 4.45 | 14,674 |
| Famous Dutch and Belgian People | 0 | - | 4.56 | 18,151 |
| France A-Z | 0 | - | 4.16 | 38,347 |
| Letters of the Greek Alphabet | 0 | - | 4.97 | 652,345 |
| Name that Greek Letter | 0 | - | 4.93 | 325,104 |
| Switzerland A-Z | 0 | - | 4.45 | 25,776 |
| Top European Languages on a Map | 0 | - | 4.77 | 132,909 |
| Famous Russians | 0 | - | 4.16 | 23,918 |
| History of Russia Quiz | 0 | - | 4.47 | 32,009 |
| Russia Multiple Choice | 0 | - | 4.58 | 40,884 |
| Russian History A-Z | 0 | - | 4.35 | 32,255 |
| Ancient Greece A-Z | 0 | - | 4.60 | 23,246 |
| The Trojan War | 0 | - | 4.83 | 40,018 |
| Greek Mythology General Knowledge #1 | 0 | - | 4.85 | 113,055 |
| Famous Irish People | 0 | - | 4.05 | 46,072 |
| History of Italy | 0 | - | 4.55 | 32,161 |
| Italy Multiple Choice | 0 | - | 4.74 | 104,437 |
| Ancient Roman Trivia #1 | 0 | - | 4.85 | 85,633 |
| Roman Emperors | 0 | - | 4.95 | 121,310 |
| Geography of the Dutch Empire | 0 | - | 4.62 | 34,833 |
| Famous Nordic People | 0 | - | 4.34 | 20,318 |
| Famous Spaniards Quiz | 0 | - | 4.24 | 11,645 |
| Countries of the Spanish Empire | 0 | - | 4.52 | 77,441 |
| The British Royal Family - Modern Times | 0 | - | 4.16 | 21,581 |
| People on Money - England | 0 | - | 4.29 | 16,647 |
| London A-Z | 0 | - | 4.10 | 40,886 |
| Asian Cities A-Z by Clue | 0 | - | 4.52 | 43,037 |
| Asian Countries by First 2 Letters | 0 | - | 4.92 | 280,829 |
| Africa A-Z | 0 | - | 4.57 | 46,786 |
| African Countries by First 2 Letters | 0 | - | 4.96 | 269,499 |
| Countries with the Most Skyscrapers per Capita | 0 | - | 4.69 | 72,822 |
| 100 Most Common English Words | 0 | - | 4.88 | 1,326,527 |
| Australian Capitals | 0 | - | 4.92 | 62,843 |
| Major non-NATO U.S. Allies | 0 | - | 4.52 | 52,553 |
| Europe Map Quiz | 0 | - | 5.00 | 4,790,268 |
| Europe Geography Quiz #1 | 0 | - | 4.55 | 71,541 |
| Europe Geography Quiz #2 | 0 | - | 4.57 | 72,209 |
| Europe Geography Quiz #4 | 0 | - | 4.57 | 70,477 |
| Europe Geography Quiz #5 | 0 | - | 4.55 | 61,440 |
| Four Letter European Geography #1 | 0 | - | 4.41 | 28,565 |
| Four Letter European Geography #2 | 0 | - | 4.54 | 20,756 |
| Capitals of French Regions | 0 | - | 4.45 | 16,186 |
| Regions of France | 0 | - | 4.70 | 122,217 |
| France Immigration by Country | 0 | - | 4.70 | 76,964 |
| German Groups of Things | 0 | - | 4.47 | 38,645 |
| Capitals of German States | 0 | - | 4.74 | 29,078 |
| Chancellors of Germany, 1949–present | 0 | - | 4.60 | 23,557 |
| Germany True or False? | 0 | - | 4.61 | 49,035 |
| Largest Islands of Greece | 0 | - | 4.59 | 48,531 |
| Olympian Gods Quiz | 0 | - | 4.96 | 504,013 |
| Ancient Greek Words | 0 | - | 4.93 | 112,562 |
| Provinces of the Netherlands | 0 | - | 4.80 | 41,830 |
| 100 Greatest Britons Quiz | 0 | - | 4.41 | 48,418 |
| Foods in a Full English Breakfast | 0 | - | 4.46 | 103,876 |
| Name Every Beatles Song | 0 | - | 4.97 | 238,487 |
| Bohemian Rhapsody Lyrics | 0 | - | 4.98 | 292,881 |
| Famous Scottish People | 0 | - | 4.22 | 18,442 |
| Asian Geography By Letter - A | 0 | - | 4.64 | 71,498 |
| Asian Geography by Letter - H | 0 | - | 4.50 | 66,104 |
| Asian Geography By Letter - M | 0 | - | 4.48 | 61,691 |
| Asian Geography by Letter - P | 0 | - | 4.45 | 58,245 |
| Asian Geography by Letter - T | 0 | - | 4.52 | 57,685 |
| Asian Geography By Letter - L | 0 | - | 4.49 | 43,341 |
| Asian Geography By Letter - O | 0 | - | 4.66 | 32,341 |
| Middle East A-Z | 0 | - | 4.47 | 46,254 |
| Most Common English Verbs - Extreme | 0 | - | 4.96 | 158,639 |
| Oceania Map Quiz | 0 | - | 4.98 | 659,795 |
| Canada A-Z | 0 | - | 4.73 | 32,979 |
| European Physical Geography | 0 | - | 4.26 | 33,604 |
| Geography of Russia | 0 | - | 4.57 | 21,610 |
| Slovakia... or Slovenia? | 0 | - | 4.69 | 42,145 |
| History of Austria | 0 | - | 4.70 | 17,981 |
| Geography of the French Empire | 0 | - | 4.45 | 27,222 |
| The French Revolution | 0 | - | 4.47 | 24,153 |
| France Multiple Choice | 0 | - | 4.39 | 40,860 |
| History of France | 0 | - | 4.61 | 57,664 |
| Biggest Cities in Germany in 1910 | 0 | - | 4.41 | 23,565 |
| Roman Numeral Decoding Quiz | 0 | - | 4.94 | 440,028 |
| Two Letter Roman Numerals | 0 | - | 4.97 | 56,547 |
| The Vikings! | 0 | - | 4.46 | 28,413 |
| Sweden Immigration by Country | 0 | - | 4.53 | 56,405 |
| The Portuguese Empire | 0 | - | 4.58 | 12,114 |
| American to British Word Translation | 0 | - | 4.14 | 139,753 |
| Languages of the United Kingdom | 0 | - | 4.14 | 41,073 |
| The Thirteen Dwarves in the Hobbit | 0 | - | 4.81 | 28,828 |
| Champions League Top 4 | 0 | - | 4.78 | 139,309 |
| East Asia Map Quiz | 0 | - | 4.99 | 1,452,866 |
| Asia Map Quiz | 0 | - | 4.99 | 925,817 |
| A Quiz About Islam | 0 | - | 4.32 | 48,638 |
| Countries That Don't Recognize Israel | 0 | - | 4.68 | 35,201 |
| Africa Map Quiz | 0 | - | 5.00 | 2,129,572 |
| Oceanian Capitals - Map Quiz | 0 | - | 4.96 | 51,521 |
| Australia Map Quiz | 0 | - | 4.95 | 346,292 |
| U.S. Geography by Letter - B | 0 | - | 4.54 | 70,089 |
| U.S. Geography by Letter - S | 0 | - | 4.55 | 58,153 |
| U.S. Federal Holidays | 0 | - | 4.33 | 99,636 |
| United States Map Quiz | 0 | - | 4.98 | 4,172,318 |
| Two Letter U.S. State Abbreviations | 0 | - | 4.19 | 749,999 |
| Mediterranean Countries Quiz | 0 | - | 4.99 | 214,119 |
| Countries with Territorial Claims in Antarctica | 0 | - | 4.94 | 92,955 |
| Countries That Use the Euro | 0 | - | 4.95 | 106,983 |
| Europe Cities Map Quiz | 0 | - | 4.99 | 366,375 |
| Europe Geography Quiz #3 | 0 | - | 4.35 | 63,909 |
| 10 Easternmost Countries in Europe | 0 | - | 4.87 | 117,299 |
| Country Codes of Europe | 0 | - | 3.45 | 13,841 |
| The Only European Country ... | 0 | - | 4.91 | 219,281 |
| European Countries NOT in NATO | 0 | - | 4.91 | 62,659 |
| European Geographic Groups of Four | 0 | - | 4.56 | 20,319 |
| Austria... or Australia? | 0 | - | 4.67 | 104,788 |
| Presidents of France | 0 | - | 4.25 | 24,348 |
| Word Chain - France | 0 | - | 4.38 | 42,948 |
| Ancient Greek Trivia | 0 | - | 4.62 | 67,252 |
| Geography of Ancient Greece | 0 | - | 4.69 | 32,056 |
| Figures from Greek Mythology | 0 | - | 4.91 | 188,999 |
| Italian Foods | 0 | - | 4.30 | 73,316 |
| Countries Italy Declared War On | 0 | - | 4.74 | 46,589 |
| Kings of Spain Quiz | 0 | - | 4.14 | 14,124 |
| Canary Islands | 0 | - | 4.62 | 17,544 |
