| European Countries by First 2 Letters | 0 | - | 4.95 | 527,466 |
| Pre-Euro Currencies | 0 | - | 4.44 | 52,498 |
| Most Guessed Cities in Europe - Not Capitals | 0 | - | 4.82 | 87,063 |
| Save Europeans by Guessing Countries | 0 | - | 4.83 | 210,790 |
| European Geography By Letter - P #1 | 0 | - | 4.81 | 96,592 |
| European Geography By Letter - B #2 | 0 | - | 4.84 | 76,635 |
| Category Elimination - European Geography #3 | 0 | - | 4.85 | 80,246 |
| Count to 10 in Europe: Pro | 0 | - | 4.86 | 68,815 |
| Official European Union Languages | 0 | - | 4.97 | 237,545 |
| European Countries in their Native Language | 0 | - | 4.99 | 157,247 |
| Europe by Borders in 30 Seconds | 0 | - | 4.98 | 426,318 |
| Europe Geography Decoder | 0 | - | 4.86 | 69,721 |
| Countries that Beat Switzerland | 0 | - | 4.88 | 41,651 |
| People on Money by Country | 0 | - | 4.83 | 60,133 |
| Add A Letter - Make a European City | 0 | - | 4.90 | 23,308 |
| Celtic Nations | 0 | - | 4.69 | 46,866 |
| Countries of Europe with an Empty Map | 0 | - | 5.00 | 309,088 |
| All First-Level Subdivisions of Europe on a Map | 0 | - | 4.98 | 169,242 |
| Germany Multiple Choice | 0 | - | 4.84 | 54,170 |
| States of the German Confederation in 1848 | 0 | - | 4.89 | 31,720 |
| "Big Five" European Soccer Champions Since 2000 | 0 | - | 4.97 | 352,200 |
| World Currency Quiz | 0 | - | 4.92 | 300,139 |
| European Geography By Letter - A | 0 | - | 4.61 | 132,653 |
| European Geography By Letter - B #1 | 0 | - | 4.67 | 111,107 |
| European Geography By Letter - C | 0 | - | 4.46 | 112,088 |
| European Geography By Letter - D | 0 | - | 4.50 | 106,963 |
| European Geography By Letter - L | 0 | - | 4.52 | 112,425 |
| European Geography By Letter - M | 0 | - | 4.64 | 129,271 |
| European Geography By Letter - N | 0 | - | 4.44 | 100,016 |
| European Geography By Letter - R | 0 | - | 4.42 | 92,793 |
| European Geography By Letter - V | 0 | - | 4.43 | 92,425 |
| European Geography By Letter - T | 0 | - | 4.41 | 81,573 |
| European Geography By Letter - S #1 | 0 | - | 4.63 | 99,781 |
| Famous Germans | 0 | - | 4.50 | 54,805 |
| Famous Italians by Clue | 0 | - | 4.45 | 88,823 |
| U.S. Citizenship Test Questions | 0 | - | 4.83 | 238,747 |
| Catholic Countries in Europe | 0 | - | 4.83 | 94,534 |
| Biggest Countries in Europe in 1700 | 0 | - | 4.73 | 58,276 |
| Federal Subjects of Russia | 0 | - | 4.94 | 145,064 |
| States of Germany | 0 | - | 4.96 | 150,926 |
| Germany Immigration by Country | 0 | - | 4.85 | 80,304 |
| Regions of Italy | 0 | - | 4.92 | 75,101 |
| Netherlands Immigration by Country | 0 | - | 4.94 | 44,060 |
| Regions of Spain Quiz | 0 | - | 4.90 | 113,066 |
| Cantons of Switzerland | 0 | - | 4.98 | 50,670 |
| People on Money - England | 0 | - | 4.29 | 16,587 |
| 10 Closest Megacities to London | 0 | - | 4.90 | 17,607 |
| Champions League Winners | 0 | - | 4.92 | 1,000,098 |
| Asian Geography By Letter - B | 0 | - | 4.85 | 66,160 |
| United Kingdom A-Z | 0 | - | 4.53 | 87,395 |
| European Geography By Letter - E | 0 | - | 4.23 | 112,411 |
| European Geography By Letter - F | 0 | - | 4.17 | 91,840 |
| European Geography By Letter - H | 0 | - | 4.30 | 95,078 |
| European Geography By Letter - G | 0 | - | 4.27 | 101,703 |
| European Geography By Letter - I | 0 | - | 4.10 | 94,663 |
| European Geography By Letter - K | 0 | - | 4.14 | 69,348 |
| European Geography By Letter - O | 0 | - | 4.28 | 62,073 |
| European Geography by Letter - W | 0 | - | 4.20 | 82,416 |
| European Geography By Letter - S #2 | 0 | - | 4.19 | 50,640 |
| European Geography A-Z | 0 | - | 4.28 | 49,094 |
| European Countries with the Fewest Overnight Visitors | 0 | - | 4.78 | 41,623 |
| Word Scramble - European Countries | 0 | - | 4.70 | 141,235 |
| Top 20 Football Clubs in Europe | 0 | - | 4.48 | 113,745 |
| Category Elimination - European Geography #1 | 0 | - | 4.98 | 231,566 |
| European Map without 10 Random Countries | 0 | - | 4.97 | 275,604 |
| Category Elimination - European Geography #2 | 0 | - | 4.99 | 165,947 |
| Slavic Languages | 0 | - | 4.68 | 54,133 |
| Departments of France | 0 | - | 4.93 | 53,192 |
| Capitals of Italian Regions | 0 | - | 4.62 | 36,514 |
| The Mafia Quiz | 0 | - | 4.46 | 23,241 |
| Countries Surrounding Rome | 0 | - | 4.97 | 49,422 |
| History of The Netherlands | 0 | - | 4.46 | 17,352 |
| Spanish Immigration by Country | 0 | - | 4.63 | 55,323 |
| England or Wales? | 0 | - | 4.94 | 45,469 |
| All UEFA Champions League Teams Ever | 0 | - | 4.85 | 129,130 |
| Currencies by $ymbol | 0 | - | 4.56 | 33,304 |
| African Countries by First 2 Letters | 0 | - | 4.96 | 267,263 |
| 100 Longest Rivers in Europe - with a Map | 0 | - | 4.94 | 65,080 |
| French Geography Quiz #1 | 0 | - | 4.89 | 34,615 |
| Asian Countries by First 2 Letters | 0 | - | 4.91 | 278,054 |
| Africa A-Z | 0 | - | 4.57 | 46,482 |
| Top European Languages on a Map | 0 | - | 4.77 | 131,514 |
| Name a Major European City A-Z | 0 | - | 4.33 | 49,289 |
| History of Russia Quiz | 0 | - | 4.49 | 31,833 |
| 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 | 38,105 |
| Letters of the Greek Alphabet | 0 | - | 4.97 | 644,185 |
| Name that Greek Letter | 0 | - | 4.93 | 322,394 |
| History of Italy | 0 | - | 4.55 | 31,888 |
| Italy Multiple Choice | 0 | - | 4.74 | 103,397 |
| Geography of the Dutch Empire | 0 | - | 4.61 | 34,549 |
| Countries of the Spanish Empire | 0 | - | 4.52 | 77,075 |
| Switzerland A-Z | 0 | - | 4.45 | 25,563 |
| Asian Cities A-Z by Clue | 0 | - | 4.52 | 35,086 |
| 100 Most Common English Words | 0 | - | 4.88 | 1,309,380 |
| Europe Map Quiz | 0 | - | 5.00 | 4,743,365 |
| Four Letter European Geography #1 | 0 | - | 4.44 | 27,827 |
| Four Letter European Geography #2 | 0 | - | 4.57 | 20,187 |
| Famous Russians | 0 | - | 4.16 | 23,765 |
| Famous French People | 0 | - | 4.12 | 28,115 |
| Capitals of French Regions | 0 | - | 4.45 | 16,013 |
| 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 | 39,541 |
| Greek Mythology General Knowledge #1 | 0 | - | 4.85 | 111,073 |
| Famous Irish People | 0 | - | 4.05 | 45,901 |
| Ancient Roman Trivia #1 | 0 | - | 4.85 | 84,244 |
| Roman Emperors | 0 | - | 4.95 | 119,082 |
| Famous Nordic People | 0 | - | 4.34 | 19,965 |
| 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 | 31,490 |
| London A-Z | 0 | - | 4.10 | 40,689 |
| Africa Map Quiz | 0 | - | 5.00 | 2,109,738 |
| Oceania Map Quiz | 0 | - | 4.98 | 638,003 |
| Australian Capitals | 0 | - | 4.92 | 62,646 |
| Major non-NATO U.S. Allies | 0 | - | 4.52 | 51,922 |
| Europe Geography Quiz #1 | 0 | - | 4.54 | 71,102 |
| Europe Geography Quiz #2 | 0 | - | 4.57 | 71,747 |
| Europe Geography Quiz #4 | 0 | - | 4.57 | 70,052 |
| Europe Geography Quiz #5 | 0 | - | 4.54 | 61,096 |
| Regions of France | 0 | - | 4.78 | 119,825 |
| France Immigration by Country | 0 | - | 4.72 | 76,149 |
| German Groups of Things | 0 | - | 4.46 | 38,370 |
| Germany True or False? | 0 | - | 4.61 | 48,641 |
| Largest Islands of Greece | 0 | - | 4.59 | 47,690 |
| Olympian Gods Quiz | 0 | - | 4.96 | 498,025 |
| Provinces of the Netherlands | 0 | - | 4.80 | 41,012 |
| 100 Greatest Britons Quiz | 0 | - | 4.41 | 48,134 |
| Foods in a Full English Breakfast | 0 | - | 4.46 | 102,791 |
| Famous Scottish People | 0 | - | 4.22 | 18,351 |
| Asian Geography By Letter - A | 0 | - | 4.64 | 70,936 |
| Asian Geography by Letter - H | 0 | - | 4.49 | 65,505 |
| Asian Geography By Letter - M | 0 | - | 4.47 | 61,244 |
| Asian Geography by Letter - P | 0 | - | 4.45 | 57,692 |
| Asian Geography by Letter - T | 0 | - | 4.50 | 57,171 |
| East Asia Map Quiz | 0 | - | 4.99 | 1,443,544 |
| Asia Map Quiz | 0 | - | 4.99 | 910,257 |
| Asian Geography By Letter - L | 0 | - | 4.49 | 42,810 |
| Middle East A-Z | 0 | - | 4.47 | 45,897 |
| Most Common English Verbs - Extreme | 0 | - | 4.96 | 156,302 |
| Landlocked Countries in Africa | 0 | - | 4.99 | 46,192 |
| African East Coast | 0 | - | 4.96 | 95,445 |
| Western Africa Map Quiz | 0 | - | 4.97 | 73,301 |
| Oceanian Capitals - Map Quiz | 0 | - | 4.95 | 50,133 |
| Canada A-Z | 0 | - | 4.73 | 32,712 |
| Mediterranean Countries Quiz | 0 | - | 4.99 | 210,929 |
| Countries with Territorial Claims in Antarctica | 0 | - | 4.94 | 92,427 |
| Countries That Use the Euro | 0 | - | 4.95 | 103,779 |
| European Physical Geography | 0 | - | 4.26 | 33,414 |
| 10 Easternmost Countries in Europe | 0 | - | 4.89 | 114,195 |
| Country Codes of Europe | 0 | - | 3.46 | 13,672 |
| The Only European Country ... | 0 | - | 4.91 | 214,925 |
| European Countries NOT in NATO | 0 | - | 4.90 | 60,189 |
| Geography of Russia | 0 | - | 4.57 | 21,466 |
| Russian History A-Z | 0 | - | 4.38 | 31,351 |
| Slovakia... or Slovenia? | 0 | - | 4.69 | 41,840 |
| History of Austria | 0 | - | 4.70 | 17,793 |
| Presidents of France | 0 | - | 4.25 | 23,965 |
| Geography of the French Empire | 0 | - | 4.45 | 26,986 |
| The French Revolution | 0 | - | 4.46 | 23,851 |
| France Multiple Choice | 0 | - | 4.38 | 40,675 |
| History of France | 0 | - | 4.59 | 56,529 |
| Biggest Cities in Germany in 1910 | 0 | - | 4.41 | 23,421 |
| Ancient Greek Words | 0 | - | 4.93 | 111,040 |
| Two Letter Roman Numerals | 0 | - | 4.97 | 55,807 |
| 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 | 13,988 |
| American to British Word Translation | 0 | - | 4.13 | 138,096 |
| Languages of the United Kingdom | 0 | - | 4.13 | 40,796 |
| The Thirteen Dwarves in the Hobbit | 0 | - | 4.81 | 28,446 |
| Name Every Beatles Song | 0 | - | 4.97 | 234,895 |
| Bohemian Rhapsody Lyrics | 0 | - | 4.98 | 291,063 |
| Champions League Top 4 | 0 | - | 4.77 | 134,790 |
| South and Central Asia Map Quiz | 0 | - | 4.93 | 98,115 |
| A Quiz About Islam | 0 | - | 4.31 | 48,308 |
| Countries That Don't Recognize Israel | 0 | - | 4.63 | 34,601 |
| Countries with the Most Military Troops | 0 | - | 4.95 | 286,120 |
| Countries with Nuclear Weapons | 0 | - | 4.86 | 270,039 |
| Countries with NO Military | 0 | - | 4.97 | 61,510 |
| Top Arms Exporting Countries | 0 | - | 4.96 | 87,970 |
| Countries with the Most Elite Universities | 0 | - | 4.94 | 147,307 |
| Monarchies of the World | 0 | - | 4.94 | 167,286 |
| Countries by Hottest Recorded Temperature | 0 | - | 4.91 | 112,035 |
| Countries by Coldest Recorded Temperature | 0 | - | 4.83 | 111,247 |
| Countries where the Sea Freezes | 0 | - | 4.93 | 113,759 |
| Largest Countries Without Deserts | 0 | - | 4.89 | 74,816 |
| Countries by Number of Books Published | 0 | - | 4.95 | 72,120 |
| NATO Countries | 0 | - | 4.98 | 277,728 |
| EU Countries Quiz | 0 | - | 4.99 | 271,325 |
| Top Five Countries by Religion | 0 | - | 4.93 | 169,852 |
| Books of the Protestant Bible | 0 | - | 4.89 | 208,443 |
| Astronomy Quiz | 0 | - | 4.90 | 82,054 |
| Countries with the Longest High Speed Rail Networks | 0 | - | 4.91 | 65,349 |
| Cities with the Most Metro Rail Stations | 0 | - | 4.89 | 101,988 |
