| European Countries by First 2 Letters | 0 | - | 4.95 | 526,418 |
| Most Guessed Cities in Europe - Not Capitals | 0 | - | 4.82 | 86,864 |
| European Geography By Letter - P #1 | 0 | - | 4.81 | 96,344 |
| European Geography By Letter - B #2 | 0 | - | 4.83 | 76,286 |
| Federal Subjects of Russia | 0 | - | 4.94 | 144,036 |
| Famous Germans | 0 | - | 4.50 | 54,628 |
| Famous Italians by Clue | 0 | - | 4.45 | 88,540 |
| Count to 10 in Europe: Pro | 0 | - | 4.85 | 68,591 |
| Official European Union Languages | 0 | - | 4.97 | 236,723 |
| European Countries in their Native Language | 0 | - | 4.99 | 156,715 |
| Europe by Borders in 30 Seconds | 0 | - | 4.98 | 425,263 |
| Pre-Euro Currencies | 0 | - | 4.44 | 52,452 |
| Famous Russians | 0 | - | 4.16 | 23,730 |
| Europe Geography Decoder | 0 | - | 4.86 | 69,547 |
| Countries that Beat Switzerland | 0 | - | 4.88 | 41,572 |
| History of Russia Quiz | 0 | - | 4.49 | 31,795 |
| Add A Letter - Make a European City | 0 | - | 4.90 | 23,244 |
| Celtic Nations | 0 | - | 4.69 | 46,816 |
| European Geography By Letter - A | 0 | - | 4.56 | 132,422 |
| European Geography By Letter - B #1 | 0 | - | 4.67 | 110,921 |
| European Geography By Letter - C | 0 | - | 4.46 | 111,870 |
| European Geography By Letter - D | 0 | - | 4.50 | 106,728 |
| European Geography By Letter - L | 0 | - | 4.52 | 112,235 |
| European Geography By Letter - M | 0 | - | 4.61 | 128,923 |
| European Geography By Letter - N | 0 | - | 4.44 | 99,687 |
| European Geography By Letter - R | 0 | - | 4.42 | 92,640 |
| European Geography By Letter - V | 0 | - | 4.43 | 92,032 |
| European Geography By Letter - T | 0 | - | 4.41 | 81,322 |
| European Geography By Letter - S #1 | 0 | - | 4.63 | 99,609 |
| Countries of Europe with an Empty Map | 0 | - | 5.00 | 307,879 |
| All First-Level Subdivisions of Europe on a Map | 0 | - | 4.98 | 167,975 |
| Countries with Territory in the Balkans | 0 | - | 4.96 | 88,283 |
| Eastern Europe Map Quiz | 0 | - | 4.91 | 127,215 |
| Slavic Countries | 0 | - | 4.96 | 110,874 |
| Famous Swiss and Austrian People | 0 | - | 4.45 | 14,556 |
| Famous Dutch and Belgian People | 0 | - | 4.56 | 17,962 |
| Germany Multiple Choice | 0 | - | 4.84 | 54,052 |
| "Big Five" European Soccer Champions Since 2000 | 0 | - | 4.97 | 350,051 |
| U.S. Citizenship Test Questions | 0 | - | 4.83 | 238,355 |
| Catholic Countries in Europe | 0 | - | 4.83 | 94,235 |
| Countries Formerly in Yugoslavia | 0 | - | 4.95 | 124,222 |
| Famous French People | 0 | - | 4.12 | 27,958 |
| States of Germany | 0 | - | 4.96 | 150,122 |
| Germany Immigration by Country | 0 | - | 4.84 | 80,040 |
| Famous Irish People | 0 | - | 4.05 | 45,857 |
| Regions of Italy | 0 | - | 4.92 | 74,743 |
| Netherlands Immigration by Country | 0 | - | 4.94 | 43,831 |
| Famous Nordic People | 0 | - | 4.34 | 19,863 |
| Famous Spaniards Quiz | 0 | - | 4.24 | 11,545 |
| Regions of Spain Quiz | 0 | - | 4.90 | 112,385 |
| Cantons of Switzerland | 0 | - | 4.98 | 50,216 |
| Champions League Winners | 0 | - | 4.92 | 996,605 |
| Asian Geography By Letter - B | 0 | - | 4.85 | 66,006 |
| Biggest Countries in Europe in 1700 | 0 | - | 4.73 | 58,156 |
| Geography of Russia | 0 | - | 4.57 | 21,428 |
| Czech Republic Country Quiz | 0 | - | 4.52 | 41,869 |
| States of the German Confederation in 1848 | 0 | - | 4.89 | 31,533 |
| United Kingdom A-Z | 0 | - | 4.53 | 87,231 |
| 10 Closest Megacities to London | 0 | - | 4.90 | 17,452 |
| European Geography By Letter - E | 0 | - | 4.23 | 112,232 |
| European Geography By Letter - F | 0 | - | 4.17 | 91,675 |
| European Geography By Letter - H | 0 | - | 4.30 | 94,914 |
| European Geography By Letter - G | 0 | - | 4.25 | 101,293 |
| European Geography By Letter - I | 0 | - | 4.10 | 94,503 |
| European Geography By Letter - K | 0 | - | 4.14 | 69,180 |
| European Geography By Letter - O | 0 | - | 4.28 | 61,933 |
| European Geography by Letter - W | 0 | - | 4.20 | 82,302 |
| European Geography By Letter - S #2 | 0 | - | 4.19 | 50,521 |
| European Geography A-Z | 0 | - | 4.28 | 49,008 |
| Category Elimination - European Geography #1 | 0 | - | 4.98 | 230,596 |
| European Map without 10 Random Countries | 0 | - | 4.97 | 274,257 |
| Category Elimination - European Geography #2 | 0 | - | 4.99 | 165,201 |
| Croatia Country Quiz | 0 | - | 4.83 | 42,863 |
| Bosnia and Herzegovina Country Quiz | 0 | - | 4.86 | 35,043 |
| Departments of France | 0 | - | 4.93 | 52,849 |
| Countries Surrounding Rome | 0 | - | 4.97 | 49,373 |
| History of The Netherlands | 0 | - | 4.46 | 17,316 |
| Famous Scottish People | 0 | - | 4.22 | 18,326 |
| England or Wales? | 0 | - | 4.94 | 45,328 |
| All UEFA Champions League Teams Ever | 0 | - | 4.85 | 128,534 |
| Famous Australians by Description | 0 | - | 4.23 | 27,622 |
| European Countries with the Fewest Overnight Visitors | 0 | - | 4.78 | 41,602 |
| Word Scramble - European Countries | 0 | - | 4.70 | 141,002 |
| Top 20 Football Clubs in Europe | 0 | - | 4.48 | 113,085 |
| Name a Major European City A-Z | 0 | - | 4.33 | 49,137 |
| 100 Longest Rivers in Europe - with a Map | 0 | - | 4.94 | 64,849 |
| Slavic Languages | 0 | - | 4.67 | 53,991 |
| Non-Bordering Countries Closest to Russia | 0 | - | 4.91 | 82,387 |
| Countries that Border Hungary | 0 | - | 4.98 | 103,710 |
| North Macedonia Country Quiz | 0 | - | 4.81 | 27,624 |
| Moldova Country Quiz | 0 | - | 4.81 | 30,545 |
| French Geography Quiz #1 | 0 | - | 4.89 | 34,520 |
| France A-Z | 0 | - | 4.16 | 38,064 |
| Letters of the Greek Alphabet | 0 | - | 4.97 | 642,022 |
| Name that Greek Letter | 0 | - | 4.94 | 321,714 |
| Capitals of Italian Regions | 0 | - | 4.62 | 36,433 |
| Spanish Immigration by Country | 0 | - | 4.63 | 55,254 |
| Switzerland A-Z | 0 | - | 4.45 | 25,510 |
| Africa A-Z | 0 | - | 4.57 | 46,375 |
| African Countries by First 2 Letters | 0 | - | 4.96 | 266,558 |
| Top European Languages on a Map | 0 | - | 4.77 | 131,151 |
| Word Chain - Russia | 0 | - | 4.33 | 15,685 |
| Russia Multiple Choice | 0 | - | 4.58 | 40,571 |
| Countries Bordering Ukraine, with an Empty Map | 0 | - | 4.86 | 95,916 |
| Ancient Greece A-Z | 0 | - | 4.60 | 22,986 |
| The Trojan War | 0 | - | 4.83 | 39,441 |
| Greek Mythology General Knowledge #1 | 0 | - | 4.85 | 110,561 |
| History of Italy | 0 | - | 4.55 | 31,820 |
| Italy Multiple Choice | 0 | - | 4.74 | 103,179 |
| Ancient Roman Trivia #1 | 0 | - | 4.85 | 84,060 |
| Roman Emperors | 0 | - | 4.95 | 118,509 |
| Geography of the Dutch Empire | 0 | - | 4.62 | 34,487 |
| Countries of the Spanish Empire | 0 | - | 4.52 | 76,984 |
| The British Royal Family - Modern Times | 0 | - | 4.16 | 21,466 |
| People on Money - England | 0 | - | 4.29 | 16,565 |
| English Monarchs in Order by First Letter | 0 | - | 4.38 | 31,339 |
| London A-Z | 0 | - | 4.10 | 40,640 |
| Asian Cities A-Z by Clue | 0 | - | 4.51 | 34,300 |
| Asian Countries by First 2 Letters | 0 | - | 4.91 | 277,127 |
| Famous Chinese People | 0 | - | 4.09 | 11,800 |
| Famous Mexicans and Mexican-Americans | 0 | - | 4.15 | 16,906 |
| Major non-NATO U.S. Allies | 0 | - | 4.52 | 51,754 |
| Europe Map Quiz | 0 | - | 5.00 | 4,732,004 |
| Europe Geography Quiz #1 | 0 | - | 4.54 | 70,997 |
| Europe Geography Quiz #2 | 0 | - | 4.57 | 71,627 |
| Europe Geography Quiz #4 | 0 | - | 4.57 | 69,952 |
| Europe Geography Quiz #5 | 0 | - | 4.54 | 60,991 |
| Most Mentioned Allies of Russia | 0 | - | 4.49 | 37,802 |
| Most Mentioned Enemies of Russia | 0 | - | 4.69 | 89,575 |
| Capitals of French Regions | 0 | - | 4.45 | 15,988 |
| Regions of France | 0 | - | 4.78 | 119,289 |
| France Immigration by Country | 0 | - | 4.72 | 75,974 |
| German Groups of Things | 0 | - | 4.46 | 38,307 |
| Capitals of German States | 0 | - | 4.74 | 28,814 |
| Chancellors of Germany, 1949–present | 0 | - | 4.60 | 23,102 |
| Germany True or False? | 0 | - | 4.61 | 48,537 |
| Largest Islands of Greece | 0 | - | 4.59 | 47,474 |
| Olympian Gods Quiz | 0 | - | 4.96 | 496,305 |
| Ancient Greek Words | 0 | - | 4.92 | 110,718 |
| Provinces of the Netherlands | 0 | - | 4.80 | 40,839 |
| 100 Greatest Britons Quiz | 0 | - | 4.41 | 48,052 |
| Foods in a Full English Breakfast | 0 | - | 4.46 | 101,978 |
| Name Every Beatles Song | 0 | - | 4.97 | 234,145 |
| Bohemian Rhapsody Lyrics | 0 | - | 4.98 | 290,366 |
| Asian Geography By Letter - A | 0 | - | 4.64 | 70,834 |
| Asian Geography by Letter - H | 0 | - | 4.49 | 65,399 |
| Asian Geography By Letter - M | 0 | - | 4.47 | 61,169 |
| Asian Geography by Letter - P | 0 | - | 4.45 | 57,572 |
| Asian Geography by Letter - T | 0 | - | 4.50 | 57,083 |
| Asian Geography By Letter - L | 0 | - | 4.49 | 42,723 |
| Middle East A-Z | 0 | - | 4.47 | 45,792 |
| 100 Most Common English Words | 0 | - | 4.88 | 1,305,156 |
| Africa Map Quiz | 0 | - | 5.00 | 2,104,615 |
| Oceania Map Quiz | 0 | - | 4.98 | 635,427 |
| Australian Capitals | 0 | - | 4.92 | 62,594 |
| Canada A-Z | 0 | - | 4.73 | 32,652 |
| European Physical Geography | 0 | - | 4.26 | 33,375 |
| Russian History A-Z | 0 | - | 4.38 | 30,881 |
| Slovakia... or Slovenia? | 0 | - | 4.69 | 41,782 |
| Ukraine Country Quiz | 0 | - | 4.42 | 47,324 |
| Hungary Country Quiz | 0 | - | 4.49 | 43,046 |
| Romania Country Quiz | 0 | - | 4.63 | 53,360 |
| History of Austria | 0 | - | 4.70 | 17,754 |
| Geography of the French Empire | 0 | - | 4.48 | 26,940 |
| The French Revolution | 0 | - | 4.46 | 23,786 |
| France Multiple Choice | 0 | - | 4.38 | 40,635 |
| History of France | 0 | - | 4.59 | 56,083 |
| Biggest Cities in Germany in 1910 | 0 | - | 4.41 | 23,388 |
| Roman Numeral Decoding Quiz | 0 | - | 4.94 | 433,616 |
| Two Letter Roman Numerals | 0 | - | 4.97 | 55,627 |
| The Vikings! | 0 | - | 4.46 | 28,247 |
| Sweden Immigration by Country | 0 | - | 4.55 | 55,706 |
| The Portuguese Empire | 0 | - | 4.54 | 11,993 |
| American to British Word Translation | 0 | - | 4.06 | 123,993 |
| Languages of the United Kingdom | 0 | - | 4.13 | 40,713 |
| The Thirteen Dwarves in the Hobbit | 0 | - | 4.81 | 28,399 |
| Champions League Top 4 | 0 | - | 4.77 | 133,875 |
| East Asia Map Quiz | 0 | - | 4.99 | 1,440,651 |
| Asia Map Quiz | 0 | - | 4.99 | 907,192 |
| A Quiz About Islam | 0 | - | 4.31 | 48,212 |
| Countries That Don't Recognize Israel | 0 | - | 4.63 | 34,452 |
| Most Common English Verbs - Extreme | 0 | - | 4.96 | 155,825 |
| Countries of Africa | 0 | - | 5.00 | 2,508,440 |
| Landlocked Countries in Africa | 0 | - | 4.99 | 45,833 |
| African East Coast | 0 | - | 4.96 | 95,071 |
| Western Africa Map Quiz | 0 | - | 4.97 | 72,947 |
| Oceanian Capitals - Map Quiz | 0 | - | 4.95 | 49,813 |
| Australia Map Quiz | 0 | - | 4.94 | 342,523 |
| U.S. Geography by Letter - B | 0 | - | 4.53 | 68,542 |
| U.S. Geography by Letter - S | 0 | - | 4.54 | 52,084 |
| U.S. Federal Holidays | 0 | - | 4.33 | 99,102 |
| United States Map Quiz | 0 | - | 4.98 | 4,142,123 |
| Two Letter U.S. State Abbreviations | 0 | - | 4.19 | 743,246 |
| Famous Canadians Quiz | 0 | - | 3.94 | 23,361 |
| Mediterranean Countries Quiz | 0 | - | 4.99 | 210,180 |
| Countries with Territorial Claims in Antarctica | 0 | - | 4.94 | 92,218 |
| Countries That Use the Euro | 0 | - | 4.96 | 103,042 |
| Europe Cities Map Quiz | 0 | - | 4.99 | 362,352 |
| Europe Geography Quiz #3 | 0 | - | 4.34 | 63,404 |
| 10 Easternmost Countries in Europe | 0 | - | 4.89 | 113,601 |
