| European Countries by First 2 Letters | 0 | - | 4.95 | 527,077 |
| Most Guessed Cities in Europe - Not Capitals | 0 | - | 4.82 | 86,997 |
| Save Europeans by Guessing Countries | 0 | - | 4.84 | 210,406 |
| European Geography By Letter - P #1 | 0 | - | 4.81 | 96,528 |
| European Geography By Letter - B #2 | 0 | - | 4.84 | 76,531 |
| Category Elimination - European Geography #3 | 0 | - | 4.85 | 80,098 |
| Count to 10 in Europe: Pro | 0 | - | 4.86 | 68,752 |
| Official European Union Languages | 0 | - | 4.97 | 237,342 |
| European Countries in their Native Language | 0 | - | 4.99 | 157,138 |
| Europe by Borders in 30 Seconds | 0 | - | 4.98 | 425,965 |
| Europe Geography Decoder | 0 | - | 4.86 | 69,657 |
| Countries that Beat Switzerland | 0 | - | 4.88 | 41,629 |
| People on Money by Country | 0 | - | 4.83 | 60,087 |
| Add A Letter - Make a European City | 0 | - | 4.90 | 23,271 |
| Celtic Nations | 0 | - | 4.69 | 46,848 |
| Countries of Europe with an Empty Map | 0 | - | 5.00 | 308,847 |
| All First-Level Subdivisions of Europe on a Map | 0 | - | 4.98 | 168,890 |
| Germany Multiple Choice | 0 | - | 4.84 | 54,136 |
| States of the German Confederation in 1848 | 0 | - | 4.89 | 31,668 |
| "Big Five" European Soccer Champions Since 2000 | 0 | - | 4.97 | 351,486 |
| World Currency Quiz | 0 | - | 4.92 | 299,639 |
| European Geography By Letter - A | 0 | - | 4.61 | 132,590 |
| European Geography By Letter - B #1 | 0 | - | 4.67 | 111,055 |
| European Geography By Letter - C | 0 | - | 4.46 | 112,021 |
| European Geography By Letter - D | 0 | - | 4.50 | 106,900 |
| European Geography By Letter - L | 0 | - | 4.52 | 112,371 |
| European Geography By Letter - M | 0 | - | 4.64 | 129,166 |
| European Geography By Letter - N | 0 | - | 4.44 | 99,968 |
| European Geography By Letter - R | 0 | - | 4.42 | 92,743 |
| European Geography By Letter - V | 0 | - | 4.43 | 92,116 |
| European Geography By Letter - T | 0 | - | 4.41 | 81,484 |
| European Geography By Letter - S #1 | 0 | - | 4.63 | 99,720 |
| Famous Germans | 0 | - | 4.50 | 54,753 |
| Famous Italians by Clue | 0 | - | 4.45 | 88,739 |
| U.S. Citizenship Test Questions | 0 | - | 4.83 | 238,594 |
| Catholic Countries in Europe | 0 | - | 4.83 | 94,432 |
| Biggest Countries in Europe in 1700 | 0 | - | 4.73 | 58,237 |
| Federal Subjects of Russia | 0 | - | 4.94 | 144,794 |
| States of Germany | 0 | - | 4.96 | 150,699 |
| Germany Immigration by Country | 0 | - | 4.85 | 80,226 |
| Regions of Italy | 0 | - | 4.92 | 74,999 |
| Netherlands Immigration by Country | 0 | - | 4.94 | 43,999 |
| Regions of Spain Quiz | 0 | - | 4.90 | 112,837 |
| Cantons of Switzerland | 0 | - | 4.98 | 50,554 |
| People on Money - England | 0 | - | 4.29 | 16,578 |
| 10 Closest Megacities to London | 0 | - | 4.90 | 17,584 |
| Champions League Winners | 0 | - | 4.92 | 998,906 |
| Asian Geography By Letter - B | 0 | - | 4.85 | 66,124 |
| United Kingdom A-Z | 0 | - | 4.53 | 87,360 |
| European Geography By Letter - E | 0 | - | 4.23 | 112,359 |
| European Geography By Letter - F | 0 | - | 4.17 | 91,793 |
| European Geography By Letter - H | 0 | - | 4.30 | 95,032 |
| European Geography By Letter - G | 0 | - | 4.27 | 101,652 |
| European Geography By Letter - I | 0 | - | 4.10 | 94,615 |
| European Geography By Letter - K | 0 | - | 4.14 | 69,302 |
| European Geography By Letter - O | 0 | - | 4.28 | 62,030 |
| European Geography by Letter - W | 0 | - | 4.20 | 82,372 |
| European Geography By Letter - S #2 | 0 | - | 4.19 | 50,596 |
| European Geography A-Z | 0 | - | 4.28 | 49,070 |
| European Countries with the Fewest Overnight Visitors | 0 | - | 4.78 | 41,614 |
| Word Scramble - European Countries | 0 | - | 4.70 | 141,145 |
| Top 20 Football Clubs in Europe | 0 | - | 4.48 | 113,540 |
| Category Elimination - European Geography #1 | 0 | - | 4.98 | 231,204 |
| European Map without 10 Random Countries | 0 | - | 4.97 | 274,755 |
| Category Elimination - European Geography #2 | 0 | - | 4.99 | 165,669 |
| Slavic Languages | 0 | - | 4.68 | 54,086 |
| Departments of France | 0 | - | 4.93 | 53,084 |
| Capitals of Italian Regions | 0 | - | 4.62 | 36,489 |
| The Mafia Quiz | 0 | - | 4.46 | 23,224 |
| Countries Surrounding Rome | 0 | - | 4.97 | 49,409 |
| History of The Netherlands | 0 | - | 4.46 | 17,348 |
| Spanish Immigration by Country | 0 | - | 4.63 | 55,299 |
| England or Wales? | 0 | - | 4.94 | 45,426 |
| All UEFA Champions League Teams Ever | 0 | - | 4.85 | 128,912 |
| Currencies by $ymbol | 0 | - | 4.56 | 33,280 |
| African Countries by First 2 Letters | 0 | - | 4.96 | 266,925 |
| 100 Longest Rivers in Europe - with a Map | 0 | - | 4.94 | 65,013 |
| French Geography Quiz #1 | 0 | - | 4.89 | 34,578 |
| Asian Countries by First 2 Letters | 0 | - | 4.91 | 277,851 |
| Africa A-Z | 0 | - | 4.57 | 46,442 |
| Top European Languages on a Map | 0 | - | 4.77 | 131,411 |
| Name a Major European City A-Z | 0 | - | 4.33 | 49,241 |
| History of Russia Quiz | 0 | - | 4.49 | 31,823 |
| Russia Multiple Choice | 0 | - | 4.58 | 40,612 |
| Famous Swiss and Austrian People | 0 | - | 4.45 | 14,575 |
| Famous Dutch and Belgian People | 0 | - | 4.56 | 17,985 |
| France A-Z | 0 | - | 4.16 | 38,095 |
| Letters of the Greek Alphabet | 0 | - | 4.97 | 643,494 |
| Name that Greek Letter | 0 | - | 4.94 | 322,157 |
| History of Italy | 0 | - | 4.55 | 31,867 |
| Italy Multiple Choice | 0 | - | 4.74 | 103,337 |
| Geography of the Dutch Empire | 0 | - | 4.61 | 34,524 |
| Countries of the Spanish Empire | 0 | - | 4.52 | 77,045 |
| Switzerland A-Z | 0 | - | 4.45 | 25,545 |
| Asian Cities A-Z by Clue | 0 | - | 4.51 | 34,915 |
| 100 Most Common English Words | 0 | - | 4.88 | 1,308,002 |
| Europe Map Quiz | 0 | - | 5.00 | 4,739,907 |
| Four Letter European Geography #1 | 0 | - | 4.44 | 27,398 |
| Four Letter European Geography #2 | 0 | - | 4.57 | 19,815 |
| Famous Russians | 0 | - | 4.16 | 23,753 |
| Famous French People | 0 | - | 4.12 | 28,085 |
| Capitals of French Regions | 0 | - | 4.45 | 16,009 |
| Capitals of German States | 0 | - | 4.74 | 28,870 |
| Chancellors of Germany, 1949–present | 0 | - | 4.60 | 23,158 |
| Ancient Greece A-Z | 0 | - | 4.60 | 23,046 |
| The Trojan War | 0 | - | 4.83 | 39,506 |
| Greek Mythology General Knowledge #1 | 0 | - | 4.85 | 110,924 |
| Famous Irish People | 0 | - | 4.05 | 45,889 |
| Ancient Roman Trivia #1 | 0 | - | 4.85 | 84,183 |
| Roman Emperors | 0 | - | 4.95 | 118,854 |
| Famous Nordic People | 0 | - | 4.34 | 19,932 |
| Famous Spaniards Quiz | 0 | - | 4.24 | 11,558 |
| The British Royal Family - Modern Times | 0 | - | 4.16 | 21,486 |
| English Monarchs in Order by First Letter | 0 | - | 4.38 | 31,444 |
| London A-Z | 0 | - | 4.10 | 40,679 |
| Africa Map Quiz | 0 | - | 5.00 | 2,107,852 |
| Oceania Map Quiz | 0 | - | 4.98 | 637,127 |
| Australian Capitals | 0 | - | 4.92 | 62,618 |
| Major non-NATO U.S. Allies | 0 | - | 4.52 | 51,864 |
| Europe Geography Quiz #1 | 0 | - | 4.54 | 71,063 |
| Europe Geography Quiz #2 | 0 | - | 4.57 | 71,705 |
| Europe Geography Quiz #4 | 0 | - | 4.57 | 70,018 |
| Europe Geography Quiz #5 | 0 | - | 4.54 | 61,058 |
| Regions of France | 0 | - | 4.78 | 119,662 |
| France Immigration by Country | 0 | - | 4.72 | 76,089 |
| German Groups of Things | 0 | - | 4.46 | 38,353 |
| Germany True or False? | 0 | - | 4.61 | 48,608 |
| Largest Islands of Greece | 0 | - | 4.59 | 47,625 |
| Olympian Gods Quiz | 0 | - | 4.96 | 497,556 |
| Provinces of the Netherlands | 0 | - | 4.80 | 40,951 |
| 100 Greatest Britons Quiz | 0 | - | 4.41 | 48,107 |
| Foods in a Full English Breakfast | 0 | - | 4.46 | 102,276 |
| Famous Scottish People | 0 | - | 4.22 | 18,344 |
| Asian Geography By Letter - A | 0 | - | 4.64 | 70,902 |
| Asian Geography by Letter - H | 0 | - | 4.49 | 65,473 |
| Asian Geography By Letter - M | 0 | - | 4.47 | 61,226 |
| Asian Geography by Letter - P | 0 | - | 4.45 | 57,650 |
| Asian Geography by Letter - T | 0 | - | 4.50 | 57,147 |
| East Asia Map Quiz | 0 | - | 4.99 | 1,442,751 |
| Asia Map Quiz | 0 | - | 4.99 | 909,141 |
| Asian Geography By Letter - L | 0 | - | 4.49 | 42,788 |
| Middle East A-Z | 0 | - | 4.47 | 45,872 |
| Most Common English Verbs - Extreme | 0 | - | 4.96 | 156,144 |
| Landlocked Countries in Africa | 0 | - | 4.99 | 46,066 |
| African East Coast | 0 | - | 4.96 | 95,324 |
| Western Africa Map Quiz | 0 | - | 4.97 | 73,203 |
| Oceanian Capitals - Map Quiz | 0 | - | 4.95 | 50,054 |
| Canada A-Z | 0 | - | 4.73 | 32,697 |
| Mediterranean Countries Quiz | 0 | - | 4.99 | 210,688 |
| Countries with Territorial Claims in Antarctica | 0 | - | 4.94 | 92,390 |
| Countries That Use the Euro | 0 | - | 4.95 | 103,556 |
| European Physical Geography | 0 | - | 4.26 | 33,406 |
| 10 Easternmost Countries in Europe | 0 | - | 4.89 | 114,014 |
| Country Codes of Europe | 0 | - | 3.46 | 13,666 |
| The Only European Country ... | 0 | - | 4.91 | 214,625 |
| European Countries NOT in NATO | 0 | - | 4.87 | 60,010 |
| Geography of Russia | 0 | - | 4.57 | 21,455 |
| Russian History A-Z | 0 | - | 4.38 | 31,270 |
| Slovakia... or Slovenia? | 0 | - | 4.69 | 41,821 |
| History of Austria | 0 | - | 4.70 | 17,780 |
| Presidents of France | 0 | - | 4.25 | 23,944 |
| Geography of the French Empire | 0 | - | 4.45 | 26,970 |
| The French Revolution | 0 | - | 4.46 | 23,835 |
| France Multiple Choice | 0 | - | 4.38 | 40,664 |
| History of France | 0 | - | 4.59 | 56,418 |
| Biggest Cities in Germany in 1910 | 0 | - | 4.41 | 23,411 |
| Ancient Greek Words | 0 | - | 4.93 | 110,949 |
| Two Letter Roman Numerals | 0 | - | 4.97 | 55,739 |
| The Vikings! | 0 | - | 4.46 | 28,269 |
| Sweden Immigration by Country | 0 | - | 4.55 | 55,774 |
| The Portuguese Empire | 0 | - | 4.58 | 12,008 |
| Kings of Spain Quiz | 0 | - | 4.14 | 13,978 |
| American to British Word Translation | 0 | - | 4.13 | 137,501 |
| Languages of the United Kingdom | 0 | - | 4.13 | 40,775 |
| The Thirteen Dwarves in the Hobbit | 0 | - | 4.81 | 28,431 |
| Name Every Beatles Song | 0 | - | 4.97 | 234,652 |
| Bohemian Rhapsody Lyrics | 0 | - | 4.98 | 290,714 |
| Champions League Top 4 | 0 | - | 4.77 | 134,468 |
| South and Central Asia Map Quiz | 0 | - | 4.93 | 97,947 |
| A Quiz About Islam | 0 | - | 4.31 | 48,269 |
| Countries That Don't Recognize Israel | 0 | - | 4.63 | 34,552 |
| Countries with the Most Military Troops | 0 | - | 4.95 | 285,766 |
| Countries with Nuclear Weapons | 0 | - | 4.86 | 269,495 |
| Countries with NO Military | 0 | - | 4.97 | 61,381 |
| Top Arms Exporting Countries | 0 | - | 4.96 | 85,292 |
| Countries with the Most Elite Universities | 0 | - | 4.94 | 147,139 |
| Monarchies of the World | 0 | - | 4.94 | 167,088 |
| Countries by Hottest Recorded Temperature | 0 | - | 4.91 | 111,938 |
| Countries by Coldest Recorded Temperature | 0 | - | 4.83 | 111,169 |
| Countries where the Sea Freezes | 0 | - | 4.93 | 113,671 |
| Largest Countries Without Deserts | 0 | - | 4.89 | 74,782 |
| Countries by Number of Books Published | 0 | - | 4.95 | 72,052 |
| NATO Countries | 0 | - | 4.98 | 277,263 |
| EU Countries Quiz | 0 | - | 4.99 | 270,935 |
| Top Five Countries by Religion | 0 | - | 4.93 | 169,614 |
| Books of the Protestant Bible | 0 | - | 4.89 | 208,054 |
| Astronomy Quiz | 0 | - | 4.90 | 81,969 |
| Solar System Trivia | 0 | - | 4.93 | 46,222 |
| Countries with the Longest High Speed Rail Networks | 0 | - | 4.89 | 65,299 |
| Cities with the Most Metro Rail Stations | 0 | - | 4.89 | 101,927 |
