| European Countries by First 2 Letters | 0 | - | 4.95 | 526,694 |
| Pre-Euro Currencies | 0 | - | 4.44 | 52,469 |
| Most Guessed Cities in Europe - Not Capitals | 0 | - | 4.82 | 86,932 |
| Save Europeans by Guessing Countries | 0 | - | 4.84 | 209,969 |
| European Geography By Letter - P #1 | 0 | - | 4.81 | 96,450 |
| European Geography By Letter - B #2 | 0 | - | 4.83 | 76,403 |
| Category Elimination - European Geography #3 | 0 | - | 4.85 | 79,936 |
| Count to 10 in Europe: Pro | 0 | - | 4.85 | 68,673 |
| Official European Union Languages | 0 | - | 4.97 | 237,140 |
| European Countries in their Native Language | 0 | - | 4.99 | 157,008 |
| Europe by Borders in 30 Seconds | 0 | - | 4.98 | 425,600 |
| Europe Geography Decoder | 0 | - | 4.86 | 69,584 |
| Countries that Beat Switzerland | 0 | - | 4.88 | 41,598 |
| People on Money by Country | 0 | - | 4.83 | 60,035 |
| Add A Letter - Make a European City | 0 | - | 4.90 | 23,257 |
| Celtic Nations | 0 | - | 4.69 | 46,836 |
| Countries of Europe with an Empty Map | 0 | - | 5.00 | 308,141 |
| All First-Level Subdivisions of Europe on a Map | 0 | - | 4.98 | 168,440 |
| Germany Multiple Choice | 0 | - | 4.84 | 54,080 |
| "Big Five" European Soccer Champions Since 2000 | 0 | - | 4.97 | 350,650 |
| World Currency Quiz | 0 | - | 4.92 | 299,059 |
| European Geography By Letter - A | 0 | - | 4.56 | 132,484 |
| European Geography By Letter - B #1 | 0 | - | 4.67 | 110,968 |
| European Geography By Letter - C | 0 | - | 4.46 | 111,931 |
| European Geography By Letter - D | 0 | - | 4.50 | 106,782 |
| European Geography By Letter - L | 0 | - | 4.52 | 112,293 |
| European Geography By Letter - M | 0 | - | 4.61 | 129,042 |
| European Geography By Letter - N | 0 | - | 4.44 | 99,783 |
| European Geography By Letter - R | 0 | - | 4.42 | 92,688 |
| European Geography By Letter - V | 0 | - | 4.43 | 92,066 |
| European Geography By Letter - T | 0 | - | 4.41 | 81,387 |
| European Geography By Letter - S #1 | 0 | - | 4.63 | 99,652 |
| Famous Germans | 0 | - | 4.50 | 54,679 |
| Famous Italians by Clue | 0 | - | 4.45 | 88,629 |
| U.S. Citizenship Test Questions | 0 | - | 4.83 | 238,472 |
| Catholic Countries in Europe | 0 | - | 4.83 | 94,324 |
| Biggest Countries in Europe in 1700 | 0 | - | 4.73 | 58,193 |
| Federal Subjects of Russia | 0 | - | 4.94 | 144,425 |
| States of Germany | 0 | - | 4.96 | 150,390 |
| Germany Immigration by Country | 0 | - | 4.85 | 80,128 |
| States of the German Confederation in 1848 | 0 | - | 4.89 | 31,599 |
| Regions of Italy | 0 | - | 4.92 | 74,875 |
| Netherlands Immigration by Country | 0 | - | 4.94 | 43,919 |
| Regions of Spain Quiz | 0 | - | 4.90 | 112,528 |
| Cantons of Switzerland | 0 | - | 4.98 | 50,431 |
| People on Money - England | 0 | - | 4.29 | 16,571 |
| 10 Closest Megacities to London | 0 | - | 4.90 | 17,564 |
| Champions League Winners | 0 | - | 4.92 | 997,582 |
| Asian Geography By Letter - B | 0 | - | 4.85 | 66,077 |
| United Kingdom A-Z | 0 | - | 4.53 | 87,295 |
| European Geography By Letter - E | 0 | - | 4.23 | 112,282 |
| European Geography By Letter - F | 0 | - | 4.17 | 91,718 |
| European Geography By Letter - H | 0 | - | 4.30 | 94,954 |
| European Geography By Letter - G | 0 | - | 4.27 | 101,340 |
| European Geography By Letter - I | 0 | - | 4.10 | 94,547 |
| European Geography By Letter - K | 0 | - | 4.14 | 69,214 |
| European Geography By Letter - O | 0 | - | 4.28 | 61,969 |
| European Geography by Letter - W | 0 | - | 4.20 | 82,334 |
| European Geography By Letter - S #2 | 0 | - | 4.19 | 50,551 |
| European Geography A-Z | 0 | - | 4.28 | 49,037 |
| European Countries with the Fewest Overnight Visitors | 0 | - | 4.78 | 41,610 |
| Word Scramble - European Countries | 0 | - | 4.70 | 141,061 |
| Top 20 Football Clubs in Europe | 0 | - | 4.48 | 113,280 |
| Category Elimination - European Geography #1 | 0 | - | 4.98 | 230,834 |
| European Map without 10 Random Countries | 0 | - | 4.97 | 274,469 |
| Category Elimination - European Geography #2 | 0 | - | 4.99 | 165,396 |
| Slavic Languages | 0 | - | 4.67 | 54,034 |
| Departments of France | 0 | - | 4.93 | 52,972 |
| Capitals of Italian Regions | 0 | - | 4.62 | 36,450 |
| The Mafia Quiz | 0 | - | 4.46 | 23,214 |
| Countries Surrounding Rome | 0 | - | 4.97 | 49,395 |
| History of The Netherlands | 0 | - | 4.46 | 17,332 |
| Spanish Immigration by Country | 0 | - | 4.63 | 55,274 |
| England or Wales? | 0 | - | 4.94 | 45,383 |
| All UEFA Champions League Teams Ever | 0 | - | 4.85 | 128,699 |
| Currencies by $ymbol | 0 | - | 4.56 | 33,248 |
| African Countries by First 2 Letters | 0 | - | 4.96 | 266,713 |
| 100 Longest Rivers in Europe - with a Map | 0 | - | 4.94 | 64,912 |
| French Geography Quiz #1 | 0 | - | 4.89 | 34,547 |
| Asian Countries by First 2 Letters | 0 | - | 4.91 | 277,299 |
| Africa A-Z | 0 | - | 4.57 | 46,402 |
| Top European Languages on a Map | 0 | - | 4.77 | 131,260 |
| Name a Major European City A-Z | 0 | - | 4.33 | 49,193 |
| History of Russia Quiz | 0 | - | 4.49 | 31,804 |
| Russia Multiple Choice | 0 | - | 4.58 | 40,594 |
| Famous Swiss and Austrian People | 0 | - | 4.45 | 14,561 |
| Famous Dutch and Belgian People | 0 | - | 4.56 | 17,971 |
| France A-Z | 0 | - | 4.16 | 38,079 |
| Letters of the Greek Alphabet | 0 | - | 4.97 | 642,767 |
| Name that Greek Letter | 0 | - | 4.94 | 321,898 |
| History of Italy | 0 | - | 4.55 | 31,849 |
| Italy Multiple Choice | 0 | - | 4.74 | 103,254 |
| Geography of the Dutch Empire | 0 | - | 4.62 | 34,502 |
| Countries of the Spanish Empire | 0 | - | 4.52 | 77,010 |
| Switzerland A-Z | 0 | - | 4.45 | 25,529 |
| Asian Cities A-Z by Clue | 0 | - | 4.51 | 34,627 |
| 100 Most Common English Words | 0 | - | 4.88 | 1,306,466 |
| Europe Map Quiz | 0 | - | 5.00 | 4,735,365 |
| Four Letter European Geography #1 | 0 | - | 4.44 | 27,214 |
| Four Letter European Geography #2 | 0 | - | 4.57 | 19,667 |
| Famous Russians | 0 | - | 4.16 | 23,740 |
| Famous French People | 0 | - | 4.12 | 28,013 |
| Capitals of French Regions | 0 | - | 4.45 | 15,995 |
| Capitals of German States | 0 | - | 4.74 | 28,823 |
| Chancellors of Germany, 1949–present | 0 | - | 4.60 | 23,120 |
| Ancient Greece A-Z | 0 | - | 4.60 | 23,012 |
| The Trojan War | 0 | - | 4.83 | 39,474 |
| Greek Mythology General Knowledge #1 | 0 | - | 4.85 | 110,734 |
| Famous Irish People | 0 | - | 4.05 | 45,871 |
| Ancient Roman Trivia #1 | 0 | - | 4.85 | 84,119 |
| Roman Emperors | 0 | - | 4.95 | 118,642 |
| Famous Nordic People | 0 | - | 4.34 | 19,892 |
| Famous Spaniards Quiz | 0 | - | 4.24 | 11,551 |
| The British Royal Family - Modern Times | 0 | - | 4.16 | 21,479 |
| English Monarchs in Order by First Letter | 0 | - | 4.38 | 31,387 |
| London A-Z | 0 | - | 4.10 | 40,662 |
| Africa Map Quiz | 0 | - | 5.00 | 2,106,013 |
| Oceania Map Quiz | 0 | - | 4.98 | 636,243 |
| Australian Capitals | 0 | - | 4.92 | 62,605 |
| Major non-NATO U.S. Allies | 0 | - | 4.52 | 51,808 |
| Europe Geography Quiz #1 | 0 | - | 4.54 | 71,025 |
| Europe Geography Quiz #2 | 0 | - | 4.57 | 71,660 |
| Europe Geography Quiz #4 | 0 | - | 4.57 | 69,984 |
| Europe Geography Quiz #5 | 0 | - | 4.54 | 61,022 |
| Regions of France | 0 | - | 4.78 | 119,461 |
| France Immigration by Country | 0 | - | 4.72 | 76,029 |
| German Groups of Things | 0 | - | 4.46 | 38,326 |
| Germany True or False? | 0 | - | 4.61 | 48,566 |
| Largest Islands of Greece | 0 | - | 4.59 | 47,539 |
| Olympian Gods Quiz | 0 | - | 4.96 | 496,979 |
| Provinces of the Netherlands | 0 | - | 4.80 | 40,889 |
| 100 Greatest Britons Quiz | 0 | - | 4.41 | 48,084 |
| Foods in a Full English Breakfast | 0 | - | 4.46 | 102,073 |
| Famous Scottish People | 0 | - | 4.22 | 18,336 |
| Asian Geography By Letter - A | 0 | - | 4.64 | 70,876 |
| Asian Geography by Letter - H | 0 | - | 4.49 | 65,436 |
| Asian Geography By Letter - M | 0 | - | 4.47 | 61,197 |
| Asian Geography by Letter - P | 0 | - | 4.45 | 57,604 |
| Asian Geography by Letter - T | 0 | - | 4.50 | 57,114 |
| East Asia Map Quiz | 0 | - | 4.99 | 1,441,930 |
| Asia Map Quiz | 0 | - | 4.99 | 908,078 |
| Asian Geography By Letter - L | 0 | - | 4.49 | 42,759 |
| Middle East A-Z | 0 | - | 4.47 | 45,835 |
| Most Common English Verbs - Extreme | 0 | - | 4.96 | 155,964 |
| Landlocked Countries in Africa | 0 | - | 4.99 | 45,921 |
| African East Coast | 0 | - | 4.96 | 95,172 |
| Western Africa Map Quiz | 0 | - | 4.97 | 73,044 |
| Oceanian Capitals - Map Quiz | 0 | - | 4.95 | 49,936 |
| Canada A-Z | 0 | - | 4.73 | 32,674 |
| Mediterranean Countries Quiz | 0 | - | 4.99 | 210,401 |
| Countries with Territorial Claims in Antarctica | 0 | - | 4.94 | 92,326 |
| Countries That Use the Euro | 0 | - | 4.95 | 103,276 |
| European Physical Geography | 0 | - | 4.26 | 33,385 |
| 10 Easternmost Countries in Europe | 0 | - | 4.89 | 113,777 |
| Country Codes of Europe | 0 | - | 3.46 | 13,658 |
| The Only European Country ... | 0 | - | 4.91 | 214,193 |
| European Countries NOT in NATO | 0 | - | 4.87 | 59,790 |
| Geography of Russia | 0 | - | 4.57 | 21,441 |
| Russian History A-Z | 0 | - | 4.38 | 31,147 |
| Slovakia... or Slovenia? | 0 | - | 4.69 | 41,802 |
| History of Austria | 0 | - | 4.70 | 17,769 |
| Presidents of France | 0 | - | 4.25 | 23,929 |
| Geography of the French Empire | 0 | - | 4.45 | 26,954 |
| The French Revolution | 0 | - | 4.46 | 23,810 |
| France Multiple Choice | 0 | - | 4.38 | 40,650 |
| History of France | 0 | - | 4.59 | 56,238 |
| Biggest Cities in Germany in 1910 | 0 | - | 4.41 | 23,399 |
| Ancient Greek Words | 0 | - | 4.92 | 110,820 |
| Two Letter Roman Numerals | 0 | - | 4.97 | 55,673 |
| The Vikings! | 0 | - | 4.46 | 28,256 |
| Sweden Immigration by Country | 0 | - | 4.55 | 55,736 |
| The Portuguese Empire | 0 | - | 4.54 | 12,002 |
| Kings of Spain Quiz | 0 | - | 4.14 | 13,970 |
| American to British Word Translation | 0 | - | 4.12 | 136,023 |
| Languages of the United Kingdom | 0 | - | 4.13 | 40,744 |
| The Thirteen Dwarves in the Hobbit | 0 | - | 4.81 | 28,412 |
| Name Every Beatles Song | 0 | - | 4.97 | 234,361 |
| Bohemian Rhapsody Lyrics | 0 | - | 4.98 | 290,467 |
| Champions League Top 4 | 0 | - | 4.77 | 134,123 |
| South and Central Asia Map Quiz | 0 | - | 4.93 | 97,628 |
| A Quiz About Islam | 0 | - | 4.31 | 48,240 |
| Countries That Don't Recognize Israel | 0 | - | 4.63 | 34,501 |
| Countries with the Most Military Troops | 0 | - | 4.95 | 285,346 |
| Countries with Nuclear Weapons | 0 | - | 4.86 | 268,892 |
| Countries with NO Military | 0 | - | 4.97 | 61,265 |
| Top Arms Exporting Countries | 0 | - | 4.96 | 85,162 |
| Countries with the Most Elite Universities | 0 | - | 4.94 | 146,948 |
| Monarchies of the World | 0 | - | 4.94 | 166,848 |
| Countries by Hottest Recorded Temperature | 0 | - | 4.91 | 111,818 |
| Countries by Coldest Recorded Temperature | 0 | - | 4.83 | 111,065 |
| Countries where the Sea Freezes | 0 | - | 4.93 | 113,567 |
| Largest Countries Without Deserts | 0 | - | 4.89 | 74,716 |
| Countries by Number of Books Published | 0 | - | 4.95 | 71,981 |
| NATO Countries | 0 | - | 4.98 | 276,436 |
| EU Countries Quiz | 0 | - | 4.99 | 270,411 |
| Top Five Countries by Religion | 0 | - | 4.93 | 169,269 |
| Books of the Protestant Bible | 0 | - | 4.89 | 207,640 |
| Astronomy Quiz | 0 | - | 4.90 | 81,855 |
| Countries with the Longest High Speed Rail Networks | 0 | - | 4.89 | 65,233 |
| Cities with the Most Metro Rail Stations | 0 | - | 4.89 | 101,827 |
