| European Countries by First 2 Letters | 0 | - | 4.95 | 527,420 |
| Pre-Euro Currencies | 0 | - | 4.44 | 52,496 |
| Most Guessed Cities in Europe - Not Capitals | 0 | - | 4.82 | 87,060 |
| Save Europeans by Guessing Countries | 0 | - | 4.83 | 210,742 |
| European Geography By Letter - P #1 | 0 | - | 4.81 | 96,587 |
| European Geography By Letter - B #2 | 0 | - | 4.84 | 76,631 |
| Category Elimination - European Geography #3 | 0 | - | 4.85 | 80,238 |
| Count to 10 in Europe: Pro | 0 | - | 4.86 | 68,811 |
| Official European Union Languages | 0 | - | 4.97 | 237,530 |
| European Countries in their Native Language | 0 | - | 4.99 | 157,240 |
| Europe by Borders in 30 Seconds | 0 | - | 4.98 | 426,288 |
| Europe Geography Decoder | 0 | - | 4.86 | 69,719 |
| Countries that Beat Switzerland | 0 | - | 4.88 | 41,648 |
| People on Money by Country | 0 | - | 4.83 | 60,123 |
| Add A Letter - Make a European City | 0 | - | 4.90 | 23,306 |
| Celtic Nations | 0 | - | 4.69 | 46,861 |
| Countries of Europe with an Empty Map | 0 | - | 5.00 | 309,067 |
| All First-Level Subdivisions of Europe on a Map | 0 | - | 4.98 | 169,210 |
| Germany Multiple Choice | 0 | - | 4.84 | 54,166 |
| States of the German Confederation in 1848 | 0 | - | 4.89 | 31,715 |
| "Big Five" European Soccer Champions Since 2000 | 0 | - | 4.97 | 352,157 |
| World Currency Quiz | 0 | - | 4.92 | 300,093 |
| European Geography By Letter - A | 0 | - | 4.61 | 132,647 |
| European Geography By Letter - B #1 | 0 | - | 4.67 | 111,103 |
| European Geography By Letter - C | 0 | - | 4.46 | 112,084 |
| European Geography By Letter - D | 0 | - | 4.50 | 106,957 |
| European Geography By Letter - L | 0 | - | 4.52 | 112,420 |
| European Geography By Letter - M | 0 | - | 4.64 | 129,263 |
| European Geography By Letter - N | 0 | - | 4.44 | 100,012 |
| European Geography By Letter - R | 0 | - | 4.42 | 92,788 |
| European Geography By Letter - V | 0 | - | 4.43 | 92,424 |
| European Geography By Letter - T | 0 | - | 4.41 | 81,568 |
| European Geography By Letter - S #1 | 0 | - | 4.63 | 99,779 |
| Famous Germans | 0 | - | 4.50 | 54,802 |
| Famous Italians by Clue | 0 | - | 4.45 | 88,816 |
| U.S. Citizenship Test Questions | 0 | - | 4.83 | 238,736 |
| Catholic Countries in Europe | 0 | - | 4.83 | 94,524 |
| Biggest Countries in Europe in 1700 | 0 | - | 4.73 | 58,273 |
| Federal Subjects of Russia | 0 | - | 4.94 | 145,045 |
| States of Germany | 0 | - | 4.96 | 150,915 |
| Germany Immigration by Country | 0 | - | 4.85 | 80,300 |
| Regions of Italy | 0 | - | 4.92 | 75,097 |
| Netherlands Immigration by Country | 0 | - | 4.94 | 44,056 |
| Regions of Spain Quiz | 0 | - | 4.90 | 113,052 |
| Cantons of Switzerland | 0 | - | 4.98 | 50,664 |
| People on Money - England | 0 | - | 4.29 | 16,586 |
| 10 Closest Megacities to London | 0 | - | 4.90 | 17,607 |
| Champions League Winners | 0 | - | 4.92 | 1,000,035 |
| Asian Geography By Letter - B | 0 | - | 4.85 | 66,160 |
| United Kingdom A-Z | 0 | - | 4.53 | 87,393 |
| European Geography By Letter - E | 0 | - | 4.23 | 112,408 |
| European Geography By Letter - F | 0 | - | 4.17 | 91,838 |
| European Geography By Letter - H | 0 | - | 4.30 | 95,075 |
| European Geography By Letter - G | 0 | - | 4.27 | 101,700 |
| European Geography By Letter - I | 0 | - | 4.10 | 94,659 |
| European Geography By Letter - K | 0 | - | 4.14 | 69,344 |
| European Geography By Letter - O | 0 | - | 4.28 | 62,065 |
| European Geography by Letter - W | 0 | - | 4.20 | 82,414 |
| European Geography By Letter - S #2 | 0 | - | 4.19 | 50,637 |
| European Geography A-Z | 0 | - | 4.28 | 49,091 |
| European Countries with the Fewest Overnight Visitors | 0 | - | 4.78 | 41,622 |
| Word Scramble - European Countries | 0 | - | 4.70 | 141,224 |
| Top 20 Football Clubs in Europe | 0 | - | 4.48 | 113,726 |
| Category Elimination - European Geography #1 | 0 | - | 4.98 | 231,551 |
| European Map without 10 Random Countries | 0 | - | 4.97 | 275,580 |
| Category Elimination - European Geography #2 | 0 | - | 4.99 | 165,934 |
| Slavic Languages | 0 | - | 4.68 | 54,129 |
| Departments of France | 0 | - | 4.93 | 53,184 |
| Capitals of Italian Regions | 0 | - | 4.62 | 36,511 |
| The Mafia Quiz | 0 | - | 4.46 | 23,239 |
| Countries Surrounding Rome | 0 | - | 4.97 | 49,419 |
| History of The Netherlands | 0 | - | 4.46 | 17,352 |
| Spanish Immigration by Country | 0 | - | 4.63 | 55,322 |
| England or Wales? | 0 | - | 4.94 | 45,465 |
| All UEFA Champions League Teams Ever | 0 | - | 4.85 | 129,119 |
| Currencies by $ymbol | 0 | - | 4.56 | 33,303 |
| African Countries by First 2 Letters | 0 | - | 4.96 | 267,249 |
| 100 Longest Rivers in Europe - with a Map | 0 | - | 4.94 | 65,079 |
| French Geography Quiz #1 | 0 | - | 4.89 | 34,613 |
| Asian Countries by First 2 Letters | 0 | - | 4.91 | 278,042 |
| Africa A-Z | 0 | - | 4.57 | 46,478 |
| Top European Languages on a Map | 0 | - | 4.77 | 131,506 |
| Name a Major European City A-Z | 0 | - | 4.33 | 49,283 |
| History of Russia Quiz | 0 | - | 4.49 | 31,832 |
| Russia Multiple Choice | 0 | - | 4.58 | 40,626 |
| Famous Swiss and Austrian People | 0 | - | 4.45 | 14,583 |
| Famous Dutch and Belgian People | 0 | - | 4.56 | 17,993 |
| France A-Z | 0 | - | 4.16 | 38,104 |
| Letters of the Greek Alphabet | 0 | - | 4.97 | 644,142 |
| Name that Greek Letter | 0 | - | 4.93 | 322,375 |
| History of Italy | 0 | - | 4.55 | 31,881 |
| Italy Multiple Choice | 0 | - | 4.74 | 103,392 |
| Geography of the Dutch Empire | 0 | - | 4.61 | 34,547 |
| Countries of the Spanish Empire | 0 | - | 4.52 | 77,070 |
| Switzerland A-Z | 0 | - | 4.45 | 25,562 |
| Asian Cities A-Z by Clue | 0 | - | 4.52 | 35,073 |
| 100 Most Common English Words | 0 | - | 4.88 | 1,309,250 |
| Europe Map Quiz | 0 | - | 5.00 | 4,743,054 |
| Four Letter European Geography #1 | 0 | - | 4.44 | 27,811 |
| Four Letter European Geography #2 | 0 | - | 4.57 | 20,172 |
| Famous Russians | 0 | - | 4.16 | 23,765 |
| Famous French People | 0 | - | 4.12 | 28,114 |
| Capitals of French Regions | 0 | - | 4.45 | 16,012 |
| Capitals of German States | 0 | - | 4.74 | 28,886 |
| Chancellors of Germany, 1949–present | 0 | - | 4.60 | 23,182 |
| Ancient Greece A-Z | 0 | - | 4.60 | 23,065 |
| The Trojan War | 0 | - | 4.83 | 39,540 |
| Greek Mythology General Knowledge #1 | 0 | - | 4.85 | 111,060 |
| Famous Irish People | 0 | - | 4.05 | 45,898 |
| Ancient Roman Trivia #1 | 0 | - | 4.85 | 84,239 |
| Roman Emperors | 0 | - | 4.95 | 119,072 |
| Famous Nordic People | 0 | - | 4.34 | 19,964 |
| Famous Spaniards Quiz | 0 | - | 4.24 | 11,562 |
| The British Royal Family - Modern Times | 0 | - | 4.16 | 21,494 |
| English Monarchs in Order by First Letter | 0 | - | 4.38 | 31,489 |
| London A-Z | 0 | - | 4.10 | 40,687 |
| Africa Map Quiz | 0 | - | 5.00 | 2,109,614 |
| Oceania Map Quiz | 0 | - | 4.98 | 637,932 |
| Australian Capitals | 0 | - | 4.92 | 62,644 |
| Major non-NATO U.S. Allies | 0 | - | 4.52 | 51,918 |
| Europe Geography Quiz #1 | 0 | - | 4.54 | 71,101 |
| Europe Geography Quiz #2 | 0 | - | 4.57 | 71,746 |
| Europe Geography Quiz #4 | 0 | - | 4.57 | 70,051 |
| Europe Geography Quiz #5 | 0 | - | 4.54 | 61,093 |
| Regions of France | 0 | - | 4.78 | 119,813 |
| France Immigration by Country | 0 | - | 4.72 | 76,143 |
| German Groups of Things | 0 | - | 4.46 | 38,370 |
| Germany True or False? | 0 | - | 4.61 | 48,636 |
| Largest Islands of Greece | 0 | - | 4.59 | 47,689 |
| Olympian Gods Quiz | 0 | - | 4.96 | 497,981 |
| Provinces of the Netherlands | 0 | - | 4.80 | 41,011 |
| 100 Greatest Britons Quiz | 0 | - | 4.41 | 48,131 |
| Foods in a Full English Breakfast | 0 | - | 4.46 | 102,779 |
| Famous Scottish People | 0 | - | 4.22 | 18,349 |
| Asian Geography By Letter - A | 0 | - | 4.64 | 70,932 |
| Asian Geography by Letter - H | 0 | - | 4.49 | 65,501 |
| Asian Geography By Letter - M | 0 | - | 4.47 | 61,242 |
| Asian Geography by Letter - P | 0 | - | 4.45 | 57,689 |
| Asian Geography by Letter - T | 0 | - | 4.50 | 57,170 |
| East Asia Map Quiz | 0 | - | 4.99 | 1,443,461 |
| Asia Map Quiz | 0 | - | 4.99 | 910,166 |
| Asian Geography By Letter - L | 0 | - | 4.49 | 42,809 |
| Middle East A-Z | 0 | - | 4.47 | 45,892 |
| Most Common English Verbs - Extreme | 0 | - | 4.96 | 156,291 |
| Landlocked Countries in Africa | 0 | - | 4.99 | 46,180 |
| African East Coast | 0 | - | 4.96 | 95,438 |
| Western Africa Map Quiz | 0 | - | 4.97 | 73,291 |
| Oceanian Capitals - Map Quiz | 0 | - | 4.95 | 50,128 |
| Canada A-Z | 0 | - | 4.73 | 32,711 |
| Mediterranean Countries Quiz | 0 | - | 4.99 | 210,912 |
| Countries with Territorial Claims in Antarctica | 0 | - | 4.94 | 92,425 |
| Countries That Use the Euro | 0 | - | 4.95 | 103,756 |
| European Physical Geography | 0 | - | 4.26 | 33,414 |
| 10 Easternmost Countries in Europe | 0 | - | 4.89 | 114,178 |
| Country Codes of Europe | 0 | - | 3.46 | 13,672 |
| The Only European Country ... | 0 | - | 4.91 | 214,899 |
| European Countries NOT in NATO | 0 | - | 4.90 | 60,178 |
| Geography of Russia | 0 | - | 4.57 | 21,465 |
| Russian History A-Z | 0 | - | 4.38 | 31,347 |
| Slovakia... or Slovenia? | 0 | - | 4.69 | 41,837 |
| History of Austria | 0 | - | 4.70 | 17,793 |
| Presidents of France | 0 | - | 4.25 | 23,964 |
| Geography of the French Empire | 0 | - | 4.45 | 26,985 |
| The French Revolution | 0 | - | 4.46 | 23,851 |
| France Multiple Choice | 0 | - | 4.38 | 40,675 |
| History of France | 0 | - | 4.59 | 56,522 |
| Biggest Cities in Germany in 1910 | 0 | - | 4.41 | 23,421 |
| Ancient Greek Words | 0 | - | 4.93 | 111,033 |
| Two Letter Roman Numerals | 0 | - | 4.97 | 55,801 |
| The Vikings! | 0 | - | 4.46 | 28,280 |
| Sweden Immigration by Country | 0 | - | 4.55 | 55,802 |
| The Portuguese Empire | 0 | - | 4.58 | 12,025 |
| Kings of Spain Quiz | 0 | - | 4.14 | 13,986 |
| American to British Word Translation | 0 | - | 4.13 | 138,069 |
| Languages of the United Kingdom | 0 | - | 4.13 | 40,795 |
| The Thirteen Dwarves in the Hobbit | 0 | - | 4.81 | 28,444 |
| Name Every Beatles Song | 0 | - | 4.97 | 234,878 |
| Bohemian Rhapsody Lyrics | 0 | - | 4.98 | 291,048 |
| Champions League Top 4 | 0 | - | 4.77 | 134,774 |
| South and Central Asia Map Quiz | 0 | - | 4.93 | 98,095 |
| A Quiz About Islam | 0 | - | 4.31 | 48,304 |
| Countries That Don't Recognize Israel | 0 | - | 4.63 | 34,600 |
| Countries with the Most Military Troops | 0 | - | 4.95 | 286,094 |
| Countries with Nuclear Weapons | 0 | - | 4.86 | 269,983 |
| Countries with NO Military | 0 | - | 4.97 | 61,501 |
| Top Arms Exporting Countries | 0 | - | 4.96 | 87,708 |
| Countries with the Most Elite Universities | 0 | - | 4.94 | 147,291 |
| Monarchies of the World | 0 | - | 4.94 | 167,267 |
| Countries by Hottest Recorded Temperature | 0 | - | 4.91 | 112,032 |
| Countries by Coldest Recorded Temperature | 0 | - | 4.83 | 111,245 |
| Countries where the Sea Freezes | 0 | - | 4.93 | 113,754 |
| Largest Countries Without Deserts | 0 | - | 4.89 | 74,814 |
| Countries by Number of Books Published | 0 | - | 4.95 | 72,115 |
| NATO Countries | 0 | - | 4.98 | 277,689 |
| EU Countries Quiz | 0 | - | 4.99 | 271,288 |
| Top Five Countries by Religion | 0 | - | 4.93 | 169,825 |
| Books of the Protestant Bible | 0 | - | 4.89 | 208,422 |
| Astronomy Quiz | 0 | - | 4.90 | 82,047 |
| Countries with the Longest High Speed Rail Networks | 0 | - | 4.91 | 65,343 |
| Cities with the Most Metro Rail Stations | 0 | - | 4.89 | 101,986 |
