| European Countries by First 2 Letters | 0 | - | 4.95 | 528,071 |
| Pre-Euro Currencies | 0 | - | 4.44 | 52,522 |
| Most Guessed Cities in Europe - Not Capitals | 0 | - | 4.82 | 87,150 |
| European Geography By Letter - P #1 | 0 | - | 4.81 | 96,660 |
| European Geography By Letter - B #2 | 0 | - | 4.84 | 76,744 |
| Category Elimination - European Geography #3 | 0 | - | 4.85 | 80,454 |
| Count to 10 in Europe: Pro | 0 | - | 4.86 | 68,895 |
| Official European Union Languages | 0 | - | 4.97 | 237,812 |
| European Countries in their Native Language | 0 | - | 4.99 | 157,415 |
| Europe by Borders in 30 Seconds | 0 | - | 4.98 | 426,828 |
| Europe Geography Decoder | 0 | - | 4.86 | 69,789 |
| Countries that Beat Switzerland | 0 | - | 4.88 | 41,693 |
| People on Money by Country | 0 | - | 4.83 | 60,202 |
| Add A Letter - Make a European City | 0 | - | 4.90 | 23,332 |
| Celtic Nations | 0 | - | 4.69 | 46,881 |
| Countries of Europe with an Empty Map | 0 | - | 5.00 | 309,538 |
| All First-Level Subdivisions of Europe on a Map | 0 | - | 4.98 | 169,800 |
| Germany Multiple Choice | 0 | - | 4.84 | 54,217 |
| States of the German Confederation in 1848 | 0 | - | 4.90 | 31,804 |
| "Big Five" European Soccer Champions Since 2000 | 0 | - | 4.97 | 353,048 |
| World Currency Quiz | 0 | - | 4.92 | 300,994 |
| European Geography By Letter - A | 0 | - | 4.61 | 132,737 |
| European Geography By Letter - B #1 | 0 | - | 4.67 | 111,165 |
| European Geography By Letter - C | 0 | - | 4.46 | 112,138 |
| European Geography By Letter - D | 0 | - | 4.50 | 107,026 |
| European Geography By Letter - L | 0 | - | 4.52 | 112,485 |
| European Geography By Letter - M | 0 | - | 4.64 | 129,389 |
| European Geography By Letter - N | 0 | - | 4.44 | 100,062 |
| European Geography By Letter - R | 0 | - | 4.42 | 92,837 |
| European Geography By Letter - V | 0 | - | 4.43 | 92,468 |
| European Geography By Letter - T | 0 | - | 4.41 | 81,656 |
| European Geography By Letter - S #1 | 0 | - | 4.63 | 99,826 |
| Famous Germans | 0 | - | 4.50 | 54,882 |
| Famous Italians by Clue | 0 | - | 4.45 | 88,965 |
| U.S. Citizenship Test Questions | 0 | - | 4.83 | 238,944 |
| Catholic Countries in Europe | 0 | - | 4.83 | 94,674 |
| Biggest Countries in Europe in 1700 | 0 | - | 4.73 | 58,327 |
| Federal Subjects of Russia | 0 | - | 4.95 | 145,673 |
| States of Germany | 0 | - | 4.96 | 151,326 |
| Germany Immigration by Country | 0 | - | 4.85 | 80,679 |
| Regions of Italy | 0 | - | 4.92 | 75,310 |
| Netherlands Immigration by Country | 0 | - | 4.93 | 50,901 |
| Regions of Spain Quiz | 0 | - | 4.90 | 113,342 |
| Cantons of Switzerland | 0 | - | 4.98 | 50,800 |
| People on Money - England | 0 | - | 4.29 | 16,595 |
| 10 Closest Megacities to London | 0 | - | 4.90 | 17,631 |
| Champions League Winners | 0 | - | 4.92 | 1,001,690 |
| Asian Geography By Letter - B | 0 | - | 4.85 | 66,200 |
| United Kingdom A-Z | 0 | - | 4.53 | 87,472 |
| European Geography By Letter - E | 0 | - | 4.23 | 112,469 |
| European Geography By Letter - F | 0 | - | 4.17 | 91,885 |
| European Geography By Letter - H | 0 | - | 4.30 | 95,142 |
| European Geography By Letter - G | 0 | - | 4.27 | 101,761 |
| European Geography By Letter - I | 0 | - | 4.10 | 94,702 |
| European Geography By Letter - K | 0 | - | 4.14 | 69,389 |
| European Geography By Letter - O | 0 | - | 4.28 | 62,107 |
| European Geography by Letter - W | 0 | - | 4.20 | 82,452 |
| European Geography By Letter - S #2 | 0 | - | 4.19 | 50,674 |
| European Geography A-Z | 0 | - | 4.29 | 49,137 |
| European Countries with the Fewest Overnight Visitors | 0 | - | 4.78 | 41,635 |
| Word Scramble - European Countries | 0 | - | 4.70 | 141,353 |
| Top 20 Football Clubs in Europe | 0 | - | 4.48 | 114,010 |
| Category Elimination - European Geography #1 | 0 | - | 4.98 | 232,085 |
| European Map without 10 Random Countries | 0 | - | 4.97 | 275,873 |
| Category Elimination - European Geography #2 | 0 | - | 4.99 | 166,271 |
| Slavic Languages | 0 | - | 4.68 | 54,197 |
| Departments of France | 0 | - | 4.93 | 53,454 |
| Capitals of Italian Regions | 0 | - | 4.62 | 36,537 |
| The Mafia Quiz | 0 | - | 4.46 | 23,259 |
| Countries Surrounding Rome | 0 | - | 4.97 | 49,468 |
| History of The Netherlands | 0 | - | 4.46 | 17,375 |
| Spanish Immigration by Country | 0 | - | 4.63 | 55,381 |
| England or Wales? | 0 | - | 4.94 | 45,521 |
| All UEFA Champions League Teams Ever | 0 | - | 4.85 | 129,411 |
| Currencies by $ymbol | 0 | - | 4.56 | 33,341 |
| African Countries by First 2 Letters | 0 | - | 4.96 | 267,542 |
| 100 Longest Rivers in Europe - with a Map | 0 | - | 4.94 | 65,199 |
| French Geography Quiz #1 | 0 | - | 4.89 | 34,668 |
| Asian Countries by First 2 Letters | 0 | - | 4.91 | 278,349 |
| Africa A-Z | 0 | - | 4.57 | 46,520 |
| Top European Languages on a Map | 0 | - | 4.77 | 131,682 |
| Name a Major European City A-Z | 0 | - | 4.33 | 49,355 |
| History of Russia Quiz | 0 | - | 4.49 | 31,859 |
| Russia Multiple Choice | 0 | - | 4.58 | 40,663 |
| Famous Swiss and Austrian People | 0 | - | 4.45 | 14,594 |
| Famous Dutch and Belgian People | 0 | - | 4.56 | 18,006 |
| France A-Z | 0 | - | 4.16 | 38,123 |
| Letters of the Greek Alphabet | 0 | - | 4.97 | 645,131 |
| Name that Greek Letter | 0 | - | 4.93 | 322,756 |
| History of Italy | 0 | - | 4.55 | 31,911 |
| Italy Multiple Choice | 0 | - | 4.73 | 103,525 |
| Geography of the Dutch Empire | 0 | - | 4.61 | 34,586 |
| Countries of the Spanish Empire | 0 | - | 4.52 | 77,115 |
| Switzerland A-Z | 0 | - | 4.45 | 25,590 |
| Asian Cities A-Z by Clue | 0 | - | 4.52 | 35,253 |
| 100 Most Common English Words | 0 | - | 4.88 | 1,311,518 |
| Europe Map Quiz | 0 | - | 5.00 | 4,748,919 |
| Four Letter European Geography #2 | 0 | - | 4.57 | 20,288 |
| Famous Russians | 0 | - | 4.16 | 23,783 |
| Famous French People | 0 | - | 4.12 | 28,159 |
| Capitals of French Regions | 0 | - | 4.45 | 16,026 |
| Capitals of German States | 0 | - | 4.74 | 28,902 |
| Chancellors of Germany, 1949–present | 0 | - | 4.60 | 23,231 |
| Ancient Greece A-Z | 0 | - | 4.60 | 23,094 |
| The Trojan War | 0 | - | 4.83 | 39,597 |
| Greek Mythology General Knowledge #1 | 0 | - | 4.85 | 111,295 |
| Famous Irish People | 0 | - | 4.05 | 45,918 |
| Ancient Roman Trivia #1 | 0 | - | 4.85 | 84,330 |
| Roman Emperors | 0 | - | 4.95 | 119,427 |
| Famous Nordic People | 0 | - | 4.34 | 20,006 |
| Famous Spaniards Quiz | 0 | - | 4.24 | 11,572 |
| The British Royal Family - Modern Times | 0 | - | 4.16 | 21,504 |
| English Monarchs in Order by First Letter | 0 | - | 4.38 | 31,540 |
| London A-Z | 0 | - | 4.10 | 40,717 |
| Africa Map Quiz | 0 | - | 5.00 | 2,111,888 |
| Oceania Map Quiz | 0 | - | 4.98 | 639,163 |
| Australian Capitals | 0 | - | 4.92 | 62,672 |
| Major non-NATO U.S. Allies | 0 | - | 4.52 | 51,994 |
| Europe Geography Quiz #1 | 0 | - | 4.55 | 71,160 |
| Europe Geography Quiz #2 | 0 | - | 4.57 | 71,812 |
| Europe Geography Quiz #4 | 0 | - | 4.57 | 70,095 |
| Europe Geography Quiz #5 | 0 | - | 4.55 | 61,136 |
| Regions of France | 0 | - | 4.78 | 120,108 |
| France Immigration by Country | 0 | - | 4.70 | 76,278 |
| German Groups of Things | 0 | - | 4.46 | 38,400 |
| Germany True or False? | 0 | - | 4.61 | 48,678 |
| Largest Islands of Greece | 0 | - | 4.59 | 47,771 |
| Olympian Gods Quiz | 0 | - | 4.96 | 498,805 |
| Provinces of the Netherlands | 0 | - | 4.80 | 41,112 |
| 100 Greatest Britons Quiz | 0 | - | 4.41 | 48,168 |
| Foods in a Full English Breakfast | 0 | - | 4.46 | 102,925 |
| Famous Scottish People | 0 | - | 4.22 | 18,366 |
| Asian Geography By Letter - A | 0 | - | 4.64 | 70,974 |
| Asian Geography by Letter - H | 0 | - | 4.49 | 65,533 |
| Asian Geography By Letter - M | 0 | - | 4.47 | 61,275 |
| Asian Geography by Letter - P | 0 | - | 4.45 | 57,739 |
| Asian Geography by Letter - T | 0 | - | 4.50 | 57,207 |
| East Asia Map Quiz | 0 | - | 4.99 | 1,444,722 |
| Asia Map Quiz | 0 | - | 4.99 | 911,910 |
| Asian Geography By Letter - L | 0 | - | 4.49 | 42,860 |
| Asian Geography By Letter - O | 0 | - | 4.65 | 31,638 |
| Middle East A-Z | 0 | - | 4.47 | 45,935 |
| Most Common English Verbs - Extreme | 0 | - | 4.96 | 156,543 |
| Landlocked Countries in Africa | 0 | - | 4.99 | 46,375 |
| African East Coast | 0 | - | 4.96 | 95,620 |
| Western Africa Map Quiz | 0 | - | 4.97 | 73,447 |
| Oceanian Capitals - Map Quiz | 0 | - | 4.95 | 50,275 |
| Canada A-Z | 0 | - | 4.73 | 32,739 |
| Mediterranean Countries Quiz | 0 | - | 4.99 | 211,311 |
| Countries with Territorial Claims in Antarctica | 0 | - | 4.94 | 92,506 |
| Countries That Use the Euro | 0 | - | 4.95 | 104,144 |
| European Physical Geography | 0 | - | 4.26 | 33,439 |
| 10 Easternmost Countries in Europe | 0 | - | 4.89 | 114,479 |
| Country Codes of Europe | 0 | - | 3.43 | 13,684 |
| The Only European Country ... | 0 | - | 4.91 | 215,431 |
| European Countries NOT in NATO | 0 | - | 4.90 | 60,476 |
| Four Letter European Geography #1 | 0 | - | 4.40 | 27,951 |
| Geography of Russia | 0 | - | 4.57 | 21,495 |
| Russian History A-Z | 0 | - | 4.38 | 31,467 |
| Slovakia... or Slovenia? | 0 | - | 4.69 | 41,876 |
| History of Austria | 0 | - | 4.70 | 17,815 |
| Presidents of France | 0 | - | 4.25 | 24,000 |
| Geography of the French Empire | 0 | - | 4.45 | 27,008 |
| The French Revolution | 0 | - | 4.46 | 23,878 |
| France Multiple Choice | 0 | - | 4.38 | 40,688 |
| History of France | 0 | - | 4.59 | 56,680 |
| Biggest Cities in Germany in 1910 | 0 | - | 4.41 | 23,443 |
| Ancient Greek Words | 0 | - | 4.93 | 111,186 |
| Two Letter Roman Numerals | 0 | - | 4.97 | 55,885 |
| The Vikings! | 0 | - | 4.46 | 28,300 |
| Sweden Immigration by Country | 0 | - | 4.55 | 55,941 |
| The Portuguese Empire | 0 | - | 4.58 | 12,035 |
| Kings of Spain Quiz | 0 | - | 4.14 | 13,997 |
| American to British Word Translation | 0 | - | 4.13 | 138,465 |
| Languages of the United Kingdom | 0 | - | 4.13 | 40,827 |
| The Thirteen Dwarves in the Hobbit | 0 | - | 4.81 | 28,484 |
| Name Every Beatles Song | 0 | - | 4.97 | 235,236 |
| Bohemian Rhapsody Lyrics | 0 | - | 4.98 | 291,248 |
| Champions League Top 4 | 0 | - | 4.77 | 135,201 |
| South and Central Asia Map Quiz | 0 | - | 4.93 | 98,325 |
| A Quiz About Islam | 0 | - | 4.31 | 48,352 |
| Countries That Don't Recognize Israel | 0 | - | 4.63 | 34,687 |
| Countries with the Most Military Troops | 0 | - | 4.95 | 286,724 |
| Countries with Nuclear Weapons | 0 | - | 4.86 | 270,860 |
| Countries with NO Military | 0 | - | 4.97 | 61,735 |
| Top Arms Exporting Countries | 0 | - | 4.96 | 89,926 |
| Countries with the Most Elite Universities | 0 | - | 4.94 | 147,632 |
| Monarchies of the World | 0 | - | 4.94 | 167,587 |
| Countries by Hottest Recorded Temperature | 0 | - | 4.91 | 112,178 |
| Countries by Coldest Recorded Temperature | 0 | - | 4.83 | 111,398 |
| Countries where the Sea Freezes | 0 | - | 4.93 | 113,918 |
| Largest Countries Without Deserts | 0 | - | 4.89 | 74,900 |
| Countries by Number of Books Published | 0 | - | 4.95 | 72,263 |
| NATO Countries | 0 | - | 4.98 | 278,498 |
| EU Countries Quiz | 0 | - | 4.99 | 272,056 |
| Top Five Countries by Religion | 0 | - | 4.93 | 170,273 |
| Books of the Protestant Bible | 0 | - | 4.89 | 208,954 |
| Astronomy Quiz | 0 | - | 4.90 | 82,207 |
| Countries with the Longest High Speed Rail Networks | 0 | - | 4.91 | 65,431 |
| Cities with the Most Metro Rail Stations | 0 | - | 4.89 | 102,104 |
