| European Countries by First 2 Letters | 0 | - | 4.95 | 532,619 |
| Pre-Euro Currencies | 0 | - | 4.44 | 52,752 |
| Most Guessed Cities in Europe - Not Capitals | 0 | - | 4.83 | 88,046 |
| Save Europeans by Guessing Countries | 0 | - | 4.86 | 216,892 |
| European Geography By Letter - P #1 | 0 | - | 4.81 | 99,010 |
| European Geography By Letter - B #2 | 0 | - | 4.87 | 88,925 |
| Category Elimination - European Geography #3 | 0 | - | 4.86 | 82,014 |
| Count to 10 in Europe: Pro | 0 | - | 4.86 | 69,761 |
| Official European Union Languages | 0 | - | 4.97 | 239,856 |
| European Countries in their Native Language | 0 | - | 4.99 | 158,687 |
| Europe by Borders in 30 Seconds | 0 | - | 4.98 | 431,023 |
| Europe Geography Decoder | 0 | - | 4.87 | 70,331 |
| Countries that Beat Switzerland | 0 | - | 4.88 | 42,065 |
| People on Money by Country | 0 | - | 4.83 | 60,723 |
| Add A Letter - Make a European City | 0 | - | 4.90 | 23,512 |
| Celtic Nations | 0 | - | 4.61 | 47,105 |
| Countries of Europe with an Empty Map | 0 | - | 5.00 | 312,843 |
| All First-Level Subdivisions of Europe on a Map | 0 | - | 4.99 | 175,991 |
| Germany Multiple Choice | 0 | - | 4.84 | 54,703 |
| States of the German Confederation in 1848 | 0 | - | 4.90 | 32,468 |
| "Big Five" European Soccer Champions Since 2000 | 0 | - | 4.97 | 361,900 |
| World Currency Quiz | 0 | - | 4.92 | 306,962 |
| European Geography By Letter - A | 0 | - | 4.52 | 148,257 |
| European Geography By Letter - B #1 | 0 | - | 4.62 | 121,659 |
| European Geography By Letter - C | 0 | - | 4.44 | 124,113 |
| European Geography By Letter - D | 0 | - | 4.49 | 118,150 |
| European Geography By Letter - L | 0 | - | 4.52 | 115,184 |
| European Geography By Letter - M | 0 | - | 4.69 | 132,656 |
| European Geography By Letter - N | 0 | - | 4.44 | 102,214 |
| European Geography By Letter - R | 0 | - | 4.43 | 94,822 |
| European Geography By Letter - V | 0 | - | 4.43 | 94,115 |
| European Geography By Letter - T | 0 | - | 4.41 | 83,699 |
| European Geography By Letter - S #1 | 0 | - | 4.63 | 101,511 |
| Famous Germans | 0 | - | 4.50 | 55,805 |
| Famous Italians by Clue | 0 | - | 4.45 | 90,416 |
| U.S. Citizenship Test Questions | 0 | - | 4.83 | 240,849 |
| Catholic Countries in Europe | 0 | - | 4.83 | 95,797 |
| Biggest Countries in Europe in 1700 | 0 | - | 4.73 | 58,759 |
| Federal Subjects of Russia | 0 | - | 4.95 | 149,596 |
| States of Germany | 0 | - | 4.95 | 154,605 |
| Germany Immigration by Country | 0 | - | 4.86 | 81,714 |
| Regions of Italy | 0 | - | 4.92 | 77,125 |
| Netherlands Immigration by Country | 0 | - | 4.93 | 52,822 |
| Regions of Spain Quiz | 0 | - | 4.90 | 115,368 |
| Cantons of Switzerland | 0 | - | 4.98 | 51,780 |
| People on Money - England | 0 | - | 4.29 | 16,645 |
| 10 Closest Megacities to London | 0 | - | 4.90 | 17,843 |
| Champions League Winners | 0 | - | 4.92 | 1,016,572 |
| Asian Geography By Letter - B | 0 | - | 4.85 | 67,063 |
| United Kingdom A-Z | 0 | - | 4.51 | 88,387 |
| European Geography By Letter - E | 0 | - | 4.23 | 115,324 |
| European Geography By Letter - F | 0 | - | 4.15 | 94,586 |
| European Geography By Letter - H | 0 | - | 4.30 | 97,290 |
| European Geography By Letter - G | 0 | - | 4.27 | 104,056 |
| European Geography By Letter - I | 0 | - | 4.07 | 96,648 |
| European Geography By Letter - K | 0 | - | 4.15 | 71,293 |
| European Geography By Letter - O | 0 | - | 4.29 | 63,673 |
| European Geography by Letter - W | 0 | - | 4.21 | 83,653 |
| European Geography By Letter - S #2 | 0 | - | 4.20 | 51,956 |
| European Geography A-Z | 0 | - | 4.29 | 49,488 |
| European Countries with the Fewest Overnight Visitors | 0 | - | 4.80 | 41,721 |
| Word Scramble - European Countries | 0 | - | 4.73 | 142,355 |
| Top 20 Football Clubs in Europe | 0 | - | 4.48 | 122,571 |
| Category Elimination - European Geography #1 | 0 | - | 4.98 | 235,975 |
| European Map without 10 Random Countries | 0 | - | 4.97 | 278,986 |
| Category Elimination - European Geography #2 | 0 | - | 4.99 | 169,000 |
| Slavic Languages | 0 | - | 4.67 | 54,713 |
| Famous French People | 0 | - | 4.05 | 36,119 |
| Departments of France | 0 | - | 4.93 | 55,216 |
| Capitals of Italian Regions | 0 | - | 4.62 | 36,745 |
| The Mafia Quiz | 0 | - | 4.46 | 23,441 |
| Countries Surrounding Rome | 0 | - | 4.97 | 49,752 |
| History of The Netherlands | 0 | - | 4.46 | 17,556 |
| Spanish Immigration by Country | 0 | - | 4.63 | 55,633 |
| English Monarchs in Order by First Letter | 0 | - | 4.38 | 32,139 |
| England or Wales? | 0 | - | 4.94 | 45,978 |
| All UEFA Champions League Teams Ever | 0 | - | 4.85 | 132,218 |
| Currencies by $ymbol | 0 | - | 4.56 | 33,577 |
| 100 Longest Rivers in Europe - with a Map | 0 | - | 4.94 | 65,971 |
| French Geography Quiz #1 | 0 | - | 4.89 | 35,102 |
| Asian Countries by First 2 Letters | 0 | - | 4.91 | 280,778 |
| African Countries by First 2 Letters | 0 | - | 4.96 | 269,457 |
| Top European Languages on a Map | 0 | - | 4.77 | 132,875 |
| Name a Major European City A-Z | 0 | - | 4.33 | 49,867 |
| History of Russia Quiz | 0 | - | 4.47 | 32,009 |
| Russia Multiple Choice | 0 | - | 4.58 | 40,880 |
| Famous Swiss and Austrian People | 0 | - | 4.45 | 14,673 |
| Famous Dutch and Belgian People | 0 | - | 4.56 | 18,145 |
| France A-Z | 0 | - | 4.16 | 38,344 |
| Letters of the Greek Alphabet | 0 | - | 4.97 | 652,177 |
| Name that Greek Letter | 0 | - | 4.93 | 325,053 |
| History of Italy | 0 | - | 4.55 | 32,157 |
| Italy Multiple Choice | 0 | - | 4.74 | 104,402 |
| Geography of the Dutch Empire | 0 | - | 4.62 | 34,829 |
| Countries of the Spanish Empire | 0 | - | 4.52 | 77,430 |
| Switzerland A-Z | 0 | - | 4.45 | 25,772 |
| Asian Cities A-Z by Clue | 0 | - | 4.52 | 43,014 |
| Africa A-Z | 0 | - | 4.57 | 46,779 |
| 100 Most Common English Words | 0 | - | 4.88 | 1,326,161 |
| Europe Map Quiz | 0 | - | 5.00 | 4,789,353 |
| Four Letter European Geography #1 | 0 | - | 4.41 | 28,558 |
| Four Letter European Geography #2 | 0 | - | 4.54 | 20,752 |
| Famous Russians | 0 | - | 4.16 | 23,915 |
| Russian History A-Z | 0 | - | 4.35 | 32,241 |
| Capitals of French Regions | 0 | - | 4.45 | 16,185 |
| Capitals of German States | 0 | - | 4.74 | 29,074 |
| Chancellors of Germany, 1949–present | 0 | - | 4.60 | 23,548 |
| Ancient Greece A-Z | 0 | - | 4.60 | 23,244 |
| The Trojan War | 0 | - | 4.83 | 40,002 |
| Greek Mythology General Knowledge #1 | 0 | - | 4.85 | 113,012 |
| Famous Irish People | 0 | - | 4.05 | 46,068 |
| Ancient Roman Trivia #1 | 0 | - | 4.85 | 85,611 |
| Roman Emperors | 0 | - | 4.95 | 121,260 |
| Famous Nordic People | 0 | - | 4.34 | 20,313 |
| Famous Spaniards Quiz | 0 | - | 4.24 | 11,645 |
| The British Royal Family - Modern Times | 0 | - | 4.16 | 21,580 |
| London A-Z | 0 | - | 4.10 | 40,881 |
| Oceania Map Quiz | 0 | - | 4.98 | 659,640 |
| Australian Capitals | 0 | - | 4.92 | 62,837 |
| Major non-NATO U.S. Allies | 0 | - | 4.52 | 52,537 |
| Europe Geography Quiz #1 | 0 | - | 4.55 | 71,535 |
| Europe Geography Quiz #2 | 0 | - | 4.57 | 72,196 |
| Europe Geography Quiz #4 | 0 | - | 4.57 | 70,470 |
| Europe Geography Quiz #5 | 0 | - | 4.55 | 61,437 |
| Regions of France | 0 | - | 4.70 | 122,158 |
| France Immigration by Country | 0 | - | 4.70 | 76,948 |
| German Groups of Things | 0 | - | 4.47 | 38,643 |
| Germany True or False? | 0 | - | 4.61 | 49,026 |
| Largest Islands of Greece | 0 | - | 4.59 | 48,501 |
| Olympian Gods Quiz | 0 | - | 4.96 | 503,885 |
| Provinces of the Netherlands | 0 | - | 4.80 | 41,796 |
| 100 Greatest Britons Quiz | 0 | - | 4.41 | 48,413 |
| Foods in a Full English Breakfast | 0 | - | 4.46 | 103,852 |
| Famous Scottish People | 0 | - | 4.22 | 18,442 |
| Asian Geography By Letter - A | 0 | - | 4.64 | 71,483 |
| Asian Geography by Letter - H | 0 | - | 4.50 | 66,094 |
| Asian Geography By Letter - M | 0 | - | 4.48 | 61,681 |
| Asian Geography by Letter - P | 0 | - | 4.45 | 58,230 |
| Asian Geography by Letter - T | 0 | - | 4.52 | 57,678 |
| East Asia Map Quiz | 0 | - | 4.99 | 1,452,705 |
| Asia Map Quiz | 0 | - | 4.99 | 925,518 |
| Asian Geography By Letter - L | 0 | - | 4.49 | 43,332 |
| Asian Geography By Letter - O | 0 | - | 4.66 | 32,330 |
| Middle East A-Z | 0 | - | 4.47 | 46,248 |
| Africa Map Quiz | 0 | - | 5.00 | 2,129,180 |
| Most Common English Verbs - Extreme | 0 | - | 4.96 | 158,583 |
| Oceanian Capitals - Map Quiz | 0 | - | 4.96 | 51,487 |
| Canada A-Z | 0 | - | 4.73 | 32,976 |
| Mediterranean Countries Quiz | 0 | - | 4.99 | 214,034 |
| Countries with Territorial Claims in Antarctica | 0 | - | 4.94 | 92,944 |
| Countries That Use the Euro | 0 | - | 4.95 | 106,902 |
| European Physical Geography | 0 | - | 4.26 | 33,599 |
| 10 Easternmost Countries in Europe | 0 | - | 4.87 | 117,225 |
| Country Codes of Europe | 0 | - | 3.45 | 13,837 |
| The Only European Country ... | 0 | - | 4.91 | 219,164 |
| European Countries NOT in NATO | 0 | - | 4.91 | 62,596 |
| Geography of Russia | 0 | - | 4.57 | 21,605 |
| Slovakia... or Slovenia? | 0 | - | 4.69 | 42,137 |
| History of Austria | 0 | - | 4.70 | 17,977 |
| Presidents of France | 0 | - | 4.25 | 24,344 |
| Geography of the French Empire | 0 | - | 4.45 | 27,220 |
| The French Revolution | 0 | - | 4.47 | 24,149 |
| France Multiple Choice | 0 | - | 4.39 | 40,855 |
| History of France | 0 | - | 4.61 | 57,643 |
| Biggest Cities in Germany in 1910 | 0 | - | 4.41 | 23,561 |
| Ancient Greek Words | 0 | - | 4.93 | 112,520 |
| Two Letter Roman Numerals | 0 | - | 4.97 | 56,528 |
| The Vikings! | 0 | - | 4.46 | 28,409 |
| Sweden Immigration by Country | 0 | - | 4.53 | 56,395 |
| The Portuguese Empire | 0 | - | 4.58 | 12,107 |
| Kings of Spain Quiz | 0 | - | 4.14 | 14,120 |
| American to British Word Translation | 0 | - | 4.14 | 139,729 |
| Languages of the United Kingdom | 0 | - | 4.14 | 41,066 |
| The Thirteen Dwarves in the Hobbit | 0 | - | 4.81 | 28,823 |
| Name Every Beatles Song | 0 | - | 4.97 | 238,406 |
| Bohemian Rhapsody Lyrics | 0 | - | 4.98 | 292,837 |
| Champions League Top 4 | 0 | - | 4.78 | 139,203 |
| South and Central Asia Map Quiz | 0 | - | 4.94 | 99,992 |
| A Quiz About Islam | 0 | - | 4.32 | 48,626 |
| Countries That Don't Recognize Israel | 0 | - | 4.68 | 35,193 |
| Landlocked Countries in Africa | 0 | - | 4.99 | 48,027 |
| African East Coast | 0 | - | 4.96 | 96,806 |
| Western Africa Map Quiz | 0 | - | 4.98 | 74,661 |
| Countries with the Most Military Troops | 0 | - | 4.95 | 291,530 |
| Countries with Nuclear Weapons | 0 | - | 4.86 | 277,141 |
| Countries with NO Military | 0 | - | 4.97 | 63,460 |
| Top Arms Exporting Countries | 0 | - | 4.97 | 105,456 |
| Countries with the Most Elite Universities | 0 | - | 4.95 | 149,826 |
| Monarchies of the World | 0 | - | 4.94 | 170,294 |
| Countries by Hottest Recorded Temperature | 0 | - | 4.92 | 113,839 |
| Countries by Coldest Recorded Temperature | 0 | - | 4.83 | 113,121 |
| Countries where the Sea Freezes | 0 | - | 4.93 | 115,249 |
| Largest Countries Without Deserts | 0 | - | 4.89 | 75,605 |
| Countries by Number of Books Published | 0 | - | 4.95 | 73,120 |
| NATO Countries | 0 | - | 4.98 | 283,581 |
| EU Countries Quiz | 0 | - | 4.99 | 278,101 |
| Top Five Countries by Religion | 0 | - | 4.93 | 173,500 |
| Books of the Protestant Bible | 0 | - | 4.85 | 212,018 |
| Astronomy Quiz | 0 | - | 4.90 | 83,330 |
| Solar System Trivia | 0 | - | 4.93 | 47,200 |
