| European Countries by First 2 Letters | 0 | - | 4.95 | 530,776 |
| Pre-Euro Currencies | 0 | - | 4.44 | 52,659 |
| Most Guessed Cities in Europe - Not Capitals | 0 | - | 4.82 | 87,623 |
| Save Europeans by Guessing Countries | 0 | - | 4.86 | 214,809 |
| European Geography By Letter - P #1 | 0 | - | 4.81 | 97,995 |
| European Geography By Letter - B #2 | 0 | - | 4.86 | 87,167 |
| Category Elimination - European Geography #3 | 0 | - | 4.86 | 81,374 |
| Count to 10 in Europe: Pro | 0 | - | 4.86 | 69,365 |
| Official European Union Languages | 0 | - | 4.97 | 238,987 |
| European Countries in their Native Language | 0 | - | 4.99 | 158,181 |
| Europe by Borders in 30 Seconds | 0 | - | 4.98 | 429,274 |
| Europe Geography Decoder | 0 | - | 4.86 | 70,128 |
| Countries that Beat Switzerland | 0 | - | 4.88 | 41,925 |
| People on Money by Country | 0 | - | 4.83 | 60,528 |
| Add A Letter - Make a European City | 0 | - | 4.90 | 23,436 |
| Celtic Nations | 0 | - | 4.69 | 47,004 |
| Countries of Europe with an Empty Map | 0 | - | 5.00 | 311,555 |
| All First-Level Subdivisions of Europe on a Map | 0 | - | 4.98 | 173,450 |
| Germany Multiple Choice | 0 | - | 4.84 | 54,490 |
| States of the German Confederation in 1848 | 0 | - | 4.90 | 32,223 |
| "Big Five" European Soccer Champions Since 2000 | 0 | - | 4.97 | 358,425 |
| World Currency Quiz | 0 | - | 4.92 | 304,459 |
| European Geography By Letter - A | 0 | - | 4.52 | 147,030 |
| European Geography By Letter - B #1 | 0 | - | 4.69 | 120,428 |
| European Geography By Letter - C | 0 | - | 4.46 | 114,825 |
| European Geography By Letter - D | 0 | - | 4.50 | 109,379 |
| European Geography By Letter - L | 0 | - | 4.52 | 114,043 |
| European Geography By Letter - M | 0 | - | 4.67 | 131,382 |
| European Geography By Letter - N | 0 | - | 4.44 | 101,237 |
| European Geography By Letter - R | 0 | - | 4.42 | 94,050 |
| European Geography By Letter - V | 0 | - | 4.42 | 93,313 |
| European Geography By Letter - T | 0 | - | 4.41 | 82,880 |
| European Geography By Letter - S #1 | 0 | - | 4.63 | 100,917 |
| Famous Germans | 0 | - | 4.50 | 55,548 |
| Famous Italians by Clue | 0 | - | 4.45 | 89,855 |
| U.S. Citizenship Test Questions | 0 | - | 4.83 | 239,784 |
| Catholic Countries in Europe | 0 | - | 4.83 | 95,428 |
| Biggest Countries in Europe in 1700 | 0 | - | 4.73 | 58,598 |
| Federal Subjects of Russia | 0 | - | 4.95 | 148,151 |
| States of Germany | 0 | - | 4.95 | 153,341 |
| Germany Immigration by Country | 0 | - | 4.85 | 81,314 |
| Regions of Italy | 0 | - | 4.92 | 76,316 |
| Netherlands Immigration by Country | 0 | - | 4.93 | 52,467 |
| Regions of Spain Quiz | 0 | - | 4.90 | 114,482 |
| Cantons of Switzerland | 0 | - | 4.98 | 51,442 |
| People on Money - England | 0 | - | 4.29 | 16,626 |
| 10 Closest Megacities to London | 0 | - | 4.90 | 17,762 |
| Champions League Winners | 0 | - | 4.92 | 1,010,335 |
| Asian Geography By Letter - B | 0 | - | 4.85 | 66,745 |
| United Kingdom A-Z | 0 | - | 4.52 | 88,182 |
| European Geography By Letter - E | 0 | - | 4.23 | 114,301 |
| European Geography By Letter - F | 0 | - | 4.17 | 93,644 |
| European Geography By Letter - H | 0 | - | 4.30 | 96,495 |
| European Geography By Letter - G | 0 | - | 4.27 | 103,183 |
| European Geography By Letter - I | 0 | - | 4.09 | 95,925 |
| European Geography By Letter - K | 0 | - | 4.14 | 70,554 |
| European Geography By Letter - O | 0 | - | 4.29 | 63,036 |
| European Geography by Letter - W | 0 | - | 4.21 | 83,171 |
| European Geography By Letter - S #2 | 0 | - | 4.20 | 51,463 |
| European Geography A-Z | 0 | - | 4.29 | 49,372 |
| European Countries with the Fewest Overnight Visitors | 0 | - | 4.80 | 41,676 |
| Word Scramble - European Countries | 0 | - | 4.73 | 141,926 |
| Top 20 Football Clubs in Europe | 0 | - | 4.48 | 115,719 |
| Category Elimination - European Geography #1 | 0 | - | 4.98 | 234,074 |
| European Map without 10 Random Countries | 0 | - | 4.97 | 277,492 |
| Category Elimination - European Geography #2 | 0 | - | 4.99 | 167,764 |
| Slavic Languages | 0 | - | 4.68 | 54,487 |
| Famous French People | 0 | - | 4.07 | 35,881 |
| Departments of France | 0 | - | 4.93 | 54,530 |
| Capitals of Italian Regions | 0 | - | 4.62 | 36,675 |
| The Mafia Quiz | 0 | - | 4.46 | 23,380 |
| Countries Surrounding Rome | 0 | - | 4.97 | 49,622 |
| History of The Netherlands | 0 | - | 4.46 | 17,491 |
| Spanish Immigration by Country | 0 | - | 4.63 | 55,518 |
| English Monarchs in Order by First Letter | 0 | - | 4.38 | 31,968 |
| England or Wales? | 0 | - | 4.94 | 45,815 |
| All UEFA Champions League Teams Ever | 0 | - | 4.85 | 131,107 |
| Currencies by $ymbol | 0 | - | 4.56 | 33,468 |
| 100 Longest Rivers in Europe - with a Map | 0 | - | 4.94 | 65,665 |
| French Geography Quiz #1 | 0 | - | 4.89 | 34,883 |
| Asian Countries by First 2 Letters | 0 | - | 4.91 | 279,768 |
| African Countries by First 2 Letters | 0 | - | 4.96 | 268,660 |
| Top European Languages on a Map | 0 | - | 4.77 | 132,390 |
| Name a Major European City A-Z | 0 | - | 4.33 | 49,669 |
| History of Russia Quiz | 0 | - | 4.47 | 31,958 |
| Russia Multiple Choice | 0 | - | 4.58 | 40,785 |
| Famous Swiss and Austrian People | 0 | - | 4.45 | 14,647 |
| Famous Dutch and Belgian People | 0 | - | 4.56 | 18,093 |
| France A-Z | 0 | - | 4.16 | 38,275 |
| Letters of the Greek Alphabet | 0 | - | 4.97 | 649,205 |
| Name that Greek Letter | 0 | - | 4.93 | 324,237 |
| History of Italy | 0 | - | 4.55 | 32,064 |
| Italy Multiple Choice | 0 | - | 4.74 | 103,993 |
| Geography of the Dutch Empire | 0 | - | 4.62 | 34,730 |
| Countries of the Spanish Empire | 0 | - | 4.52 | 77,310 |
| Switzerland A-Z | 0 | - | 4.45 | 25,695 |
| Asian Cities A-Z by Clue | 0 | - | 4.51 | 42,493 |
| Africa A-Z | 0 | - | 4.57 | 46,688 |
| 100 Most Common English Words | 0 | - | 4.88 | 1,320,310 |
| Europe Map Quiz | 0 | - | 5.00 | 4,772,811 |
| Four Letter European Geography #2 | 0 | - | 4.57 | 20,561 |
| Famous Russians | 0 | - | 4.16 | 23,874 |
| Russian History A-Z | 0 | - | 4.35 | 31,889 |
| Capitals of French Regions | 0 | - | 4.45 | 16,117 |
| Capitals of German States | 0 | - | 4.74 | 28,992 |
| Chancellors of Germany, 1949–present | 0 | - | 4.60 | 23,409 |
| Ancient Greece A-Z | 0 | - | 4.60 | 23,182 |
| The Trojan War | 0 | - | 4.83 | 39,812 |
| Greek Mythology General Knowledge #1 | 0 | - | 4.85 | 112,306 |
| Famous Irish People | 0 | - | 4.05 | 46,025 |
| Ancient Roman Trivia #1 | 0 | - | 4.85 | 84,667 |
| Roman Emperors | 0 | - | 4.95 | 120,447 |
| Famous Nordic People | 0 | - | 4.34 | 20,183 |
| Famous Spaniards Quiz | 0 | - | 4.24 | 11,624 |
| The British Royal Family - Modern Times | 0 | - | 4.16 | 21,547 |
| London A-Z | 0 | - | 4.10 | 40,823 |
| Oceania Map Quiz | 0 | - | 4.98 | 654,665 |
| Australian Capitals | 0 | - | 4.92 | 62,761 |
| Major non-NATO U.S. Allies | 0 | - | 4.52 | 52,306 |
| Europe Geography Quiz #1 | 0 | - | 4.55 | 71,368 |
| Europe Geography Quiz #2 | 0 | - | 4.57 | 72,033 |
| Europe Geography Quiz #4 | 0 | - | 4.57 | 70,327 |
| Europe Geography Quiz #5 | 0 | - | 4.55 | 61,307 |
| Regions of France | 0 | - | 4.70 | 121,312 |
| France Immigration by Country | 0 | - | 4.70 | 76,700 |
| German Groups of Things | 0 | - | 4.46 | 38,531 |
| Germany True or False? | 0 | - | 4.61 | 48,903 |
| Largest Islands of Greece | 0 | - | 4.59 | 48,162 |
| Olympian Gods Quiz | 0 | - | 4.96 | 502,056 |
| Provinces of the Netherlands | 0 | - | 4.80 | 41,516 |
| 100 Greatest Britons Quiz | 0 | - | 4.41 | 48,352 |
| Foods in a Full English Breakfast | 0 | - | 4.46 | 103,473 |
| Famous Scottish People | 0 | - | 4.22 | 18,415 |
| Asian Geography By Letter - A | 0 | - | 4.64 | 71,281 |
| Asian Geography by Letter - H | 0 | - | 4.50 | 65,857 |
| Asian Geography By Letter - M | 0 | - | 4.48 | 61,515 |
| Asian Geography by Letter - P | 0 | - | 4.45 | 58,025 |
| Asian Geography by Letter - T | 0 | - | 4.51 | 57,487 |
| East Asia Map Quiz | 0 | - | 4.99 | 1,449,882 |
| Asia Map Quiz | 0 | - | 4.99 | 920,112 |
| Asian Geography By Letter - L | 0 | - | 4.49 | 43,143 |
| Asian Geography By Letter - O | 0 | - | 4.66 | 32,058 |
| Middle East A-Z | 0 | - | 4.47 | 46,157 |
| Africa Map Quiz | 0 | - | 5.00 | 2,122,390 |
| Most Common English Verbs - Extreme | 0 | - | 4.96 | 157,722 |
| Oceanian Capitals - Map Quiz | 0 | - | 4.95 | 51,006 |
| Canada A-Z | 0 | - | 4.73 | 32,897 |
| Mediterranean Countries Quiz | 0 | - | 4.99 | 212,885 |
| Countries with Territorial Claims in Antarctica | 0 | - | 4.94 | 92,749 |
| Countries That Use the Euro | 0 | - | 4.95 | 105,677 |
| European Physical Geography | 0 | - | 4.26 | 33,543 |
| 10 Easternmost Countries in Europe | 0 | - | 4.89 | 115,774 |
| Country Codes of Europe | 0 | - | 3.43 | 13,760 |
| The Only European Country ... | 0 | - | 4.91 | 217,539 |
| European Countries NOT in NATO | 0 | - | 4.90 | 61,680 |
| Four Letter European Geography #1 | 0 | - | 4.40 | 28,321 |
| Geography of Russia | 0 | - | 4.57 | 21,557 |
| Slovakia... or Slovenia? | 0 | - | 4.69 | 42,028 |
| History of Austria | 0 | - | 4.70 | 17,914 |
| Presidents of France | 0 | - | 4.25 | 24,219 |
| Geography of the French Empire | 0 | - | 4.45 | 27,161 |
| The French Revolution | 0 | - | 4.47 | 24,072 |
| France Multiple Choice | 0 | - | 4.39 | 40,774 |
| History of France | 0 | - | 4.61 | 57,307 |
| Ancient Greek Words | 0 | - | 4.93 | 111,961 |
| Two Letter Roman Numerals | 0 | - | 4.97 | 56,297 |
| The Vikings! | 0 | - | 4.46 | 28,372 |
| Sweden Immigration by Country | 0 | - | 4.55 | 56,225 |
| The Portuguese Empire | 0 | - | 4.58 | 12,086 |
| Kings of Spain Quiz | 0 | - | 4.14 | 14,071 |
| American to British Word Translation | 0 | - | 4.14 | 139,349 |
| Languages of the United Kingdom | 0 | - | 4.13 | 40,961 |
| The Thirteen Dwarves in the Hobbit | 0 | - | 4.81 | 28,733 |
| Name Every Beatles Song | 0 | - | 4.97 | 237,178 |
| Bohemian Rhapsody Lyrics | 0 | - | 4.98 | 292,149 |
| Champions League Top 4 | 0 | - | 4.77 | 137,407 |
| South and Central Asia Map Quiz | 0 | - | 4.94 | 99,368 |
| A Quiz About Islam | 0 | - | 4.31 | 48,513 |
| Countries That Don't Recognize Israel | 0 | - | 4.68 | 34,966 |
| Landlocked Countries in Africa | 0 | - | 4.99 | 47,148 |
| African East Coast | 0 | - | 4.96 | 96,327 |
| Western Africa Map Quiz | 0 | - | 4.97 | 74,191 |
| Countries with the Most Military Troops | 0 | - | 4.95 | 289,551 |
| Countries with Nuclear Weapons | 0 | - | 4.86 | 274,727 |
| Countries with NO Military | 0 | - | 4.97 | 62,698 |
| Top Arms Exporting Countries | 0 | - | 4.96 | 92,186 |
| Countries with the Most Elite Universities | 0 | - | 4.95 | 149,040 |
| Monarchies of the World | 0 | - | 4.94 | 169,351 |
| Countries by Hottest Recorded Temperature | 0 | - | 4.92 | 113,348 |
| Countries by Coldest Recorded Temperature | 0 | - | 4.83 | 112,634 |
| Countries where the Sea Freezes | 0 | - | 4.93 | 114,798 |
| Largest Countries Without Deserts | 0 | - | 4.89 | 75,370 |
| Countries by Number of Books Published | 0 | - | 4.95 | 72,824 |
| NATO Countries | 0 | - | 4.98 | 281,745 |
| EU Countries Quiz | 0 | - | 4.99 | 275,782 |
| Top Five Countries by Religion | 0 | - | 4.93 | 172,364 |
| Books of the Protestant Bible | 0 | - | 4.84 | 210,857 |
| Astronomy Quiz | 0 | - | 4.90 | 82,869 |
| Countries with the Longest High Speed Rail Networks | 0 | - | 4.91 | 65,946 |
| Cities with the Most Metro Rail Stations | 0 | - | 4.89 | 102,611 |
