| European Countries by First 2 Letters | 0 | - | 4.95 | 531,986 |
| Most Guessed Cities in Europe - Not Capitals | 0 | - | 4.82 | 87,923 |
| Save Europeans by Guessing Countries | 0 | - | 4.86 | 216,112 |
| European Geography By Letter - P #1 | 0 | - | 4.81 | 98,605 |
| European Geography By Letter - B #2 | 0 | - | 4.87 | 88,357 |
| Category Elimination - European Geography #3 | 0 | - | 4.86 | 81,793 |
| Count to 10 in Europe: Pro | 0 | - | 4.86 | 69,609 |
| Official European Union Languages | 0 | - | 4.97 | 239,536 |
| European Countries in their Native Language | 0 | - | 4.99 | 158,512 |
| Europe by Borders in 30 Seconds | 0 | - | 4.98 | 430,400 |
| Europe Geography Decoder | 0 | - | 4.86 | 70,251 |
| Countries that Beat Switzerland | 0 | - | 4.88 | 42,015 |
| People on Money by Country | 0 | - | 4.83 | 60,647 |
| Add A Letter - Make a European City | 0 | - | 4.90 | 23,481 |
| Celtic Nations | 0 | - | 4.61 | 47,072 |
| Countries of Europe with an Empty Map | 0 | - | 5.00 | 312,328 |
| All First-Level Subdivisions of Europe on a Map | 0 | - | 4.99 | 175,197 |
| Germany Multiple Choice | 0 | - | 4.84 | 54,642 |
| States of the German Confederation in 1848 | 0 | - | 4.90 | 32,374 |
| "Big Five" European Soccer Champions Since 2000 | 0 | - | 4.97 | 360,520 |
| World Currency Quiz | 0 | - | 4.92 | 306,010 |
| European Geography By Letter - A | 0 | - | 4.52 | 147,720 |
| European Geography By Letter - B #1 | 0 | - | 4.62 | 121,097 |
| European Geography By Letter - C | 0 | - | 4.43 | 123,200 |
| European Geography By Letter - D | 0 | - | 4.50 | 110,106 |
| European Geography By Letter - L | 0 | - | 4.52 | 114,756 |
| European Geography By Letter - M | 0 | - | 4.69 | 132,114 |
| European Geography By Letter - N | 0 | - | 4.44 | 101,878 |
| European Geography By Letter - R | 0 | - | 4.43 | 94,395 |
| European Geography By Letter - V | 0 | - | 4.42 | 93,611 |
| European Geography By Letter - T | 0 | - | 4.41 | 83,322 |
| European Geography By Letter - S #1 | 0 | - | 4.63 | 101,228 |
| Famous Germans | 0 | - | 4.50 | 55,714 |
| Famous Italians by Clue | 0 | - | 4.45 | 90,261 |
| U.S. Citizenship Test Questions | 0 | - | 4.83 | 240,665 |
| Catholic Countries in Europe | 0 | - | 4.83 | 95,657 |
| Biggest Countries in Europe in 1700 | 0 | - | 4.73 | 58,710 |
| Federal Subjects of Russia | 0 | - | 4.95 | 149,108 |
| States of Germany | 0 | - | 4.95 | 154,143 |
| Germany Immigration by Country | 0 | - | 4.86 | 81,585 |
| Regions of Italy | 0 | - | 4.92 | 76,789 |
| Netherlands Immigration by Country | 0 | - | 4.93 | 52,693 |
| Regions of Spain Quiz | 0 | - | 4.90 | 115,113 |
| Cantons of Switzerland | 0 | - | 4.98 | 51,656 |
| People on Money - England | 0 | - | 4.29 | 16,638 |
| 10 Closest Megacities to London | 0 | - | 4.90 | 17,816 |
| Champions League Winners | 0 | - | 4.92 | 1,014,125 |
| Asian Geography By Letter - B | 0 | - | 4.85 | 66,902 |
| United Kingdom A-Z | 0 | - | 4.51 | 88,297 |
| European Geography By Letter - E | 0 | - | 4.23 | 114,827 |
| European Geography By Letter - F | 0 | - | 4.15 | 94,137 |
| European Geography By Letter - H | 0 | - | 4.30 | 96,934 |
| European Geography By Letter - G | 0 | - | 4.27 | 103,639 |
| European Geography By Letter - I | 0 | - | 4.07 | 96,329 |
| European Geography By Letter - K | 0 | - | 4.15 | 70,964 |
| European Geography By Letter - O | 0 | - | 4.29 | 63,380 |
| European Geography by Letter - W | 0 | - | 4.21 | 83,434 |
| European Geography By Letter - S #2 | 0 | - | 4.20 | 51,719 |
| European Geography A-Z | 0 | - | 4.29 | 49,447 |
| European Countries with the Fewest Overnight Visitors | 0 | - | 4.80 | 41,709 |
| Word Scramble - European Countries | 0 | - | 4.73 | 142,186 |
| Top 20 Football Clubs in Europe | 0 | - | 4.48 | 116,395 |
| Category Elimination - European Geography #1 | 0 | - | 4.98 | 235,307 |
| European Map without 10 Random Countries | 0 | - | 4.97 | 278,585 |
| Category Elimination - European Geography #2 | 0 | - | 4.99 | 168,555 |
| Slavic Languages | 0 | - | 4.67 | 54,635 |
| Famous French People | 0 | - | 4.07 | 36,029 |
| Departments of France | 0 | - | 4.93 | 54,926 |
| Capitals of Italian Regions | 0 | - | 4.62 | 36,716 |
| The Mafia Quiz | 0 | - | 4.46 | 23,417 |
| Countries Surrounding Rome | 0 | - | 4.97 | 49,714 |
| History of The Netherlands | 0 | - | 4.46 | 17,533 |
| Spanish Immigration by Country | 0 | - | 4.63 | 55,600 |
| English Monarchs in Order by First Letter | 0 | - | 4.38 | 32,068 |
| England or Wales? | 0 | - | 4.94 | 45,914 |
| All UEFA Champions League Teams Ever | 0 | - | 4.85 | 131,768 |
| Currencies by $ymbol | 0 | - | 4.56 | 33,544 |
| 100 Longest Rivers in Europe - with a Map | 0 | - | 4.94 | 65,835 |
| French Geography Quiz #1 | 0 | - | 4.89 | 35,027 |
| Asian Countries by First 2 Letters | 0 | - | 4.92 | 280,404 |
| African Countries by First 2 Letters | 0 | - | 4.96 | 269,121 |
| Top European Languages on a Map | 0 | - | 4.77 | 132,697 |
| Name a Major European City A-Z | 0 | - | 4.33 | 49,783 |
| History of Russia Quiz | 0 | - | 4.47 | 31,990 |
| Russia Multiple Choice | 0 | - | 4.58 | 40,840 |
| Famous Swiss and Austrian People | 0 | - | 4.45 | 14,662 |
| Famous Dutch and Belgian People | 0 | - | 4.56 | 18,125 |
| France A-Z | 0 | - | 4.16 | 38,316 |
| Letters of the Greek Alphabet | 0 | - | 4.97 | 651,014 |
| Name that Greek Letter | 0 | - | 4.93 | 324,761 |
| History of Italy | 0 | - | 4.55 | 32,118 |
| Italy Multiple Choice | 0 | - | 4.74 | 104,241 |
| Geography of the Dutch Empire | 0 | - | 4.62 | 34,791 |
| Countries of the Spanish Empire | 0 | - | 4.52 | 77,401 |
| Switzerland A-Z | 0 | - | 4.45 | 25,750 |
| Asian Cities A-Z by Clue | 0 | - | 4.52 | 42,907 |
| Africa A-Z | 0 | - | 4.57 | 46,750 |
| 100 Most Common English Words | 0 | - | 4.88 | 1,323,785 |
| Europe Map Quiz | 0 | - | 5.00 | 4,782,401 |
| Four Letter European Geography #1 | 0 | - | 4.41 | 28,462 |
| Four Letter European Geography #2 | 0 | - | 4.54 | 20,675 |
| Famous Russians | 0 | - | 4.16 | 23,895 |
| Russian History A-Z | 0 | - | 4.35 | 32,136 |
| Capitals of French Regions | 0 | - | 4.45 | 16,159 |
| Country Quiz on a Map - France | 0 | - | 4.98 | 47,614 |
| Capitals of German States | 0 | - | 4.74 | 29,046 |
| Chancellors of Germany, 1949–present | 0 | - | 4.60 | 23,511 |
| Ancient Greece A-Z | 0 | - | 4.60 | 23,220 |
| The Trojan War | 0 | - | 4.83 | 39,945 |
| Greek Mythology General Knowledge #1 | 0 | - | 4.85 | 112,758 |
| Famous Irish People | 0 | - | 4.05 | 46,055 |
| Ancient Roman Trivia #1 | 0 | - | 4.85 | 85,517 |
| Roman Emperors | 0 | - | 4.95 | 120,982 |
| Famous Nordic People | 0 | - | 4.34 | 20,266 |
| Famous Spaniards Quiz | 0 | - | 4.24 | 11,636 |
| The British Royal Family - Modern Times | 0 | - | 4.16 | 21,569 |
| London A-Z | 0 | - | 4.10 | 40,867 |
| Oceania Map Quiz | 0 | - | 4.98 | 658,349 |
| Australian Capitals | 0 | - | 4.92 | 62,812 |
| Major non-NATO U.S. Allies | 0 | - | 4.52 | 52,456 |
| Europe Geography Quiz #1 | 0 | - | 4.55 | 71,464 |
| Europe Geography Quiz #2 | 0 | - | 4.57 | 72,124 |
| Europe Geography Quiz #4 | 0 | - | 4.57 | 70,415 |
| Europe Geography Quiz #5 | 0 | - | 4.55 | 61,385 |
| Regions of France | 0 | - | 4.70 | 121,852 |
| France Immigration by Country | 0 | - | 4.70 | 76,856 |
| German Groups of Things | 0 | - | 4.47 | 38,610 |
| Germany True or False? | 0 | - | 4.61 | 48,979 |
| Largest Islands of Greece | 0 | - | 4.59 | 48,368 |
| Olympian Gods Quiz | 0 | - | 4.96 | 503,210 |
| Provinces of the Netherlands | 0 | - | 4.80 | 41,661 |
| 100 Greatest Britons Quiz | 0 | - | 4.41 | 48,387 |
| Foods in a Full English Breakfast | 0 | - | 4.46 | 103,692 |
| Famous Scottish People | 0 | - | 4.22 | 18,431 |
| Asian Geography By Letter - A | 0 | - | 4.64 | 71,386 |
| Asian Geography by Letter - H | 0 | - | 4.50 | 65,986 |
| Asian Geography By Letter - M | 0 | - | 4.48 | 61,604 |
| Asian Geography by Letter - P | 0 | - | 4.45 | 58,125 |
| Asian Geography by Letter - T | 0 | - | 4.52 | 57,592 |
| East Asia Map Quiz | 0 | - | 4.99 | 1,451,402 |
| Asia Map Quiz | 0 | - | 4.99 | 923,668 |
| Asian Geography By Letter - L | 0 | - | 4.49 | 43,253 |
| Asian Geography By Letter - O | 0 | - | 4.66 | 32,215 |
| Middle East A-Z | 0 | - | 4.47 | 46,215 |
| Africa Map Quiz | 0 | - | 5.00 | 2,126,683 |
| Most Common English Verbs - Extreme | 0 | - | 4.96 | 158,298 |
| Oceanian Capitals - Map Quiz | 0 | - | 4.95 | 51,327 |
| Canada A-Z | 0 | - | 4.73 | 32,942 |
| Mediterranean Countries Quiz | 0 | - | 4.99 | 213,581 |
| Countries with Territorial Claims in Antarctica | 0 | - | 4.94 | 92,862 |
| Countries That Use the Euro | 0 | - | 4.95 | 106,431 |
| European Physical Geography | 0 | - | 4.26 | 33,581 |
| 10 Easternmost Countries in Europe | 0 | - | 4.87 | 116,833 |
| Country Codes of Europe | 0 | - | 3.43 | 13,794 |
| The Only European Country ... | 0 | - | 4.91 | 218,537 |
| European Countries NOT in NATO | 0 | - | 4.91 | 62,251 |
| Geography of Russia | 0 | - | 4.57 | 21,584 |
| Slovakia... or Slovenia? | 0 | - | 4.69 | 42,088 |
| History of Austria | 0 | - | 4.70 | 17,962 |
| Presidents of France | 0 | - | 4.25 | 24,311 |
| Geography of the French Empire | 0 | - | 4.45 | 27,201 |
| The French Revolution | 0 | - | 4.47 | 24,124 |
| France Multiple Choice | 0 | - | 4.39 | 40,821 |
| History of France | 0 | - | 4.61 | 57,508 |
| Biggest Cities in Germany in 1910 | 0 | - | 4.41 | 23,549 |
| Ancient Greek Words | 0 | - | 4.93 | 112,301 |
| Two Letter Roman Numerals | 0 | - | 4.97 | 56,441 |
| The Vikings! | 0 | - | 4.46 | 28,397 |
| Sweden Immigration by Country | 0 | - | 4.55 | 56,329 |
| The Portuguese Empire | 0 | - | 4.58 | 12,096 |
| Kings of Spain Quiz | 0 | - | 4.14 | 14,103 |
| American to British Word Translation | 0 | - | 4.14 | 139,576 |
| Languages of the United Kingdom | 0 | - | 4.14 | 41,031 |
| The Thirteen Dwarves in the Hobbit | 0 | - | 4.81 | 28,778 |
| Name Every Beatles Song | 0 | - | 4.97 | 237,996 |
| Bohemian Rhapsody Lyrics | 0 | - | 4.98 | 292,638 |
| Champions League Top 4 | 0 | - | 4.77 | 138,471 |
| South and Central Asia Map Quiz | 0 | - | 4.94 | 99,766 |
| A Quiz About Islam | 0 | - | 4.32 | 48,581 |
| Countries That Don't Recognize Israel | 0 | - | 4.68 | 35,111 |
| Landlocked Countries in Africa | 0 | - | 4.99 | 47,683 |
| African East Coast | 0 | - | 4.96 | 96,614 |
| Western Africa Map Quiz | 0 | - | 4.97 | 74,458 |
| Countries with the Most Military Troops | 0 | - | 4.95 | 290,766 |
| Countries with Nuclear Weapons | 0 | - | 4.86 | 276,202 |
| Countries with NO Military | 0 | - | 4.97 | 63,159 |
| Top Arms Exporting Countries | 0 | - | 4.96 | 101,141 |
| Countries with the Most Elite Universities | 0 | - | 4.95 | 149,528 |
| Monarchies of the World | 0 | - | 4.94 | 169,923 |
| Countries by Hottest Recorded Temperature | 0 | - | 4.92 | 113,685 |
| Countries by Coldest Recorded Temperature | 0 | - | 4.83 | 112,941 |
| Countries where the Sea Freezes | 0 | - | 4.93 | 115,090 |
| Largest Countries Without Deserts | 0 | - | 4.89 | 75,528 |
| Countries by Number of Books Published | 0 | - | 4.95 | 73,002 |
| NATO Countries | 0 | - | 4.98 | 282,867 |
| EU Countries Quiz | 0 | - | 4.99 | 277,141 |
| Top Five Countries by Religion | 0 | - | 4.93 | 173,021 |
| Books of the Protestant Bible | 0 | - | 4.84 | 211,553 |
| Astronomy Quiz | 0 | - | 4.90 | 83,109 |
| Largest Objects in the Solar System | 0 | - | 4.99 | 138,205 |
