| European Countries by First 2 Letters | 0 | - | 4.95 | 526,223 |
| Most Guessed Cities in Europe - Not Capitals | 0 | - | 4.82 | 86,823 |
| European Geography By Letter - P #1 | 0 | - | 4.81 | 96,301 |
| European Geography By Letter - B #2 | 0 | - | 4.83 | 76,184 |
| Category Elimination - European Geography #3 | 0 | - | 4.85 | 79,734 |
| Federal Subjects of Russia | 0 | - | 4.94 | 143,875 |
| Count to 10 in Europe: Pro | 0 | - | 4.85 | 68,560 |
| Official European Union Languages | 0 | - | 4.97 | 236,463 |
| European Countries in their Native Language | 0 | - | 4.99 | 156,659 |
| Europe by Borders in 30 Seconds | 0 | - | 4.98 | 425,058 |
| Pre-Euro Currencies | 0 | - | 4.44 | 52,440 |
| Countries that Border Poland | 0 | - | 4.99 | 171,299 |
| Europe Geography Decoder | 0 | - | 4.86 | 69,520 |
| Countries that Beat Switzerland | 0 | - | 4.88 | 41,548 |
| Monarchies of the World | 0 | - | 4.94 | 166,522 |
| Add A Letter - Make a European City | 0 | - | 4.90 | 23,232 |
| Celtic Nations | 0 | - | 4.69 | 46,806 |
| European Geography By Letter - A | 0 | - | 4.56 | 132,352 |
| European Geography By Letter - B #1 | 0 | - | 4.67 | 110,855 |
| European Geography By Letter - C | 0 | - | 4.46 | 111,785 |
| European Geography By Letter - D | 0 | - | 4.50 | 106,661 |
| European Geography By Letter - L | 0 | - | 4.52 | 112,185 |
| European Geography By Letter - M | 0 | - | 4.61 | 128,835 |
| European Geography By Letter - N | 0 | - | 4.44 | 99,639 |
| European Geography By Letter - R | 0 | - | 4.42 | 92,603 |
| European Geography By Letter - V | 0 | - | 4.43 | 92,004 |
| European Geography By Letter - T | 0 | - | 4.41 | 81,273 |
| European Geography By Letter - S #1 | 0 | - | 4.63 | 99,572 |
| Countries of Europe with an Empty Map | 0 | - | 5.00 | 307,709 |
| All First-Level Subdivisions of Europe on a Map | 0 | - | 4.98 | 167,752 |
| Famous Germans | 0 | - | 4.50 | 54,595 |
| Germany Multiple Choice | 0 | - | 4.84 | 54,033 |
| Famous Italians by Clue | 0 | - | 4.45 | 88,306 |
| "Big Five" European Soccer Champions Since 2000 | 0 | - | 4.97 | 349,639 |
| Monarchies Bordering Monarchies | 0 | - | 4.85 | 59,948 |
| U.S. Citizenship Test Questions | 0 | - | 4.83 | 238,277 |
| Catholic Countries in Europe | 0 | - | 4.83 | 94,180 |
| Famous Russians | 0 | - | 4.16 | 23,723 |
| States of Germany | 0 | - | 4.96 | 149,950 |
| Germany Immigration by Country | 0 | - | 4.84 | 79,989 |
| Regions of Italy | 0 | - | 4.92 | 74,656 |
| Netherlands Immigration by Country | 0 | - | 4.94 | 43,780 |
| Regions of Spain Quiz | 0 | - | 4.90 | 112,264 |
| Cantons of Switzerland | 0 | - | 4.98 | 50,098 |
| The British Royal Family - Modern Times | 0 | - | 4.16 | 21,458 |
| English Monarchs in Order by First Letter | 0 | - | 4.38 | 31,311 |
| Champions League Winners | 0 | - | 4.92 | 995,878 |
| Asian Geography By Letter - B | 0 | - | 4.85 | 65,977 |
| Biggest Countries in Europe in 1700 | 0 | - | 4.73 | 58,124 |
| Countries That Border Russia | 0 | - | 4.98 | 458,791 |
| States of the German Confederation in 1848 | 0 | - | 4.89 | 31,509 |
| United Kingdom A-Z | 0 | - | 4.53 | 87,195 |
| 10 Closest Megacities to London | 0 | - | 4.90 | 17,400 |
| European Geography By Letter - E | 0 | - | 4.23 | 112,170 |
| European Geography By Letter - F | 0 | - | 4.17 | 91,415 |
| European Geography By Letter - H | 0 | - | 4.30 | 94,860 |
| European Geography By Letter - G | 0 | - | 4.25 | 101,236 |
| European Geography By Letter - I | 0 | - | 4.10 | 94,454 |
| European Geography By Letter - K | 0 | - | 4.14 | 69,129 |
| European Geography By Letter - O | 0 | - | 4.28 | 61,899 |
| European Geography by Letter - W | 0 | - | 4.20 | 82,280 |
| European Geography By Letter - S #2 | 0 | - | 4.19 | 50,489 |
| European Geography A-Z | 0 | - | 4.28 | 48,983 |
| Category Elimination - European Geography #1 | 0 | - | 4.98 | 230,415 |
| European Map without 10 Random Countries | 0 | - | 4.97 | 274,113 |
| Category Elimination - European Geography #2 | 0 | - | 4.99 | 165,087 |
| Russia Country Quiz | 0 | - | 4.85 | 113,605 |
| Croatia Country Quiz | 0 | - | 4.83 | 42,826 |
| Bosnia and Herzegovina Country Quiz | 0 | - | 4.86 | 35,018 |
| Departments of France | 0 | - | 4.93 | 52,749 |
| Countries Surrounding Rome | 0 | - | 4.97 | 49,354 |
| History of The Netherlands | 0 | - | 4.46 | 17,305 |
| England or Wales? | 0 | - | 4.94 | 45,303 |
| All UEFA Champions League Teams Ever | 0 | - | 4.84 | 128,416 |
| European Countries with the Fewest Overnight Visitors | 0 | - | 4.78 | 41,597 |
| Word Scramble - European Countries | 0 | - | 4.70 | 140,965 |
| Top 20 Football Clubs in Europe | 0 | - | 4.48 | 112,950 |
| Name a Major European City A-Z | 0 | - | 4.33 | 49,098 |
| 100 Longest Rivers in Europe - with a Map | 0 | - | 4.94 | 64,774 |
| Slavic Languages | 0 | - | 4.67 | 53,958 |
| Poland Country Quiz | 0 | - | 4.22 | 62,653 |
| Russian History A-Z | 0 | - | 4.38 | 30,708 |
| Non-Bordering Countries Closest to Russia | 0 | - | 4.91 | 82,356 |
| Countries that Border Hungary | 0 | - | 4.98 | 103,670 |
| North Macedonia Country Quiz | 0 | - | 4.81 | 27,598 |
| Moldova Country Quiz | 0 | - | 4.81 | 30,527 |
| Countries Bordering Serbia | 0 | - | 4.96 | 91,710 |
| French Geography Quiz #1 | 0 | - | 4.89 | 34,507 |
| Famous Swiss and Austrian People | 0 | - | 4.45 | 14,550 |
| Famous Dutch and Belgian People | 0 | - | 4.56 | 17,960 |
| France A-Z | 0 | - | 4.16 | 38,050 |
| Letters of the Greek Alphabet | 0 | - | 4.97 | 641,637 |
| Name that Greek Letter | 0 | - | 4.94 | 321,559 |
| Capitals of Italian Regions | 0 | - | 4.62 | 36,423 |
| Spanish Immigration by Country | 0 | - | 4.63 | 55,238 |
| Switzerland A-Z | 0 | - | 4.45 | 25,500 |
| Africa A-Z | 0 | - | 4.57 | 46,357 |
| African Countries by First 2 Letters | 0 | - | 4.96 | 266,450 |
| Top European Languages on a Map | 0 | - | 4.77 | 131,078 |
| History of Russia Quiz | 0 | - | 4.49 | 31,784 |
| Russia Multiple Choice | 0 | - | 4.58 | 40,557 |
| Countries that Beat Russia | 0 | - | 4.84 | 81,853 |
| Countries Bordering Ukraine, with an Empty Map | 0 | - | 4.86 | 95,880 |
| Famous French People | 0 | - | 4.12 | 27,920 |
| Ancient Greece A-Z | 0 | - | 4.60 | 22,981 |
| The Trojan War | 0 | - | 4.83 | 39,419 |
| Greek Mythology General Knowledge #1 | 0 | - | 4.85 | 110,485 |
| Famous Irish People | 0 | - | 4.05 | 45,853 |
| History of Italy | 0 | - | 4.55 | 31,808 |
| Italy Multiple Choice | 0 | - | 4.74 | 103,135 |
| Ancient Roman Trivia #1 | 0 | - | 4.85 | 84,023 |
| Roman Emperors | 0 | - | 4.95 | 118,408 |
| Geography of the Dutch Empire | 0 | - | 4.62 | 34,476 |
| Famous Nordic People | 0 | - | 4.34 | 19,845 |
| Famous Spaniards Quiz | 0 | - | 4.24 | 11,540 |
| Countries of the Spanish Empire | 0 | - | 4.52 | 76,974 |
| People on Money - England | 0 | - | 4.29 | 16,561 |
| London A-Z | 0 | - | 4.10 | 40,632 |
| Asian Cities A-Z by Clue | 0 | - | 4.53 | 33,995 |
| Asian Countries by First 2 Letters | 0 | - | 4.91 | 277,059 |
| Major non-NATO U.S. Allies | 0 | - | 4.52 | 51,715 |
| Europe Map Quiz | 0 | - | 5.00 | 4,729,837 |
| Europe Geography Quiz #1 | 0 | - | 4.54 | 70,979 |
| Europe Geography Quiz #2 | 0 | - | 4.57 | 71,606 |
| Europe Geography Quiz #4 | 0 | - | 4.57 | 69,929 |
| Europe Geography Quiz #5 | 0 | - | 4.54 | 60,968 |
| Most Mentioned Allies of Russia | 0 | - | 4.49 | 37,783 |
| Most Mentioned Enemies of Russia | 0 | - | 4.69 | 89,541 |
| Capitals of French Regions | 0 | - | 4.45 | 15,982 |
| Regions of France | 0 | - | 4.78 | 119,166 |
| France Immigration by Country | 0 | - | 4.72 | 75,941 |
| German Groups of Things | 0 | - | 4.46 | 38,297 |
| Capitals of German States | 0 | - | 4.74 | 28,806 |
| Chancellors of Germany, 1949–present | 0 | - | 4.60 | 23,090 |
| Germany True or False? | 0 | - | 4.61 | 48,518 |
| Largest Islands of Greece | 0 | - | 4.59 | 47,434 |
| Olympian Gods Quiz | 0 | - | 4.96 | 495,703 |
| Ancient Greek Words | 0 | - | 4.92 | 110,634 |
| Provinces of the Netherlands | 0 | - | 4.80 | 40,760 |
| 100 Greatest Britons Quiz | 0 | - | 4.41 | 48,037 |
| Foods in a Full English Breakfast | 0 | - | 4.46 | 101,915 |
| Name Every Beatles Song | 0 | - | 4.97 | 233,976 |
| Bohemian Rhapsody Lyrics | 0 | - | 4.98 | 290,281 |
| Famous Scottish People | 0 | - | 4.22 | 18,326 |
| Asian Geography By Letter - A | 0 | - | 4.64 | 70,817 |
| Asian Geography by Letter - H | 0 | - | 4.49 | 65,378 |
| Asian Geography By Letter - M | 0 | - | 4.47 | 61,148 |
| Asian Geography by Letter - P | 0 | - | 4.45 | 57,553 |
| Asian Geography by Letter - T | 0 | - | 4.50 | 57,056 |
| Asian Geography By Letter - L | 0 | - | 4.49 | 42,697 |
| Middle East A-Z | 0 | - | 4.47 | 45,773 |
| 100 Most Common English Words | 0 | - | 4.88 | 1,304,329 |
| Africa Map Quiz | 0 | - | 5.00 | 2,103,721 |
| Oceania Map Quiz | 0 | - | 4.98 | 635,000 |
| Australian Capitals | 0 | - | 4.92 | 62,589 |
| Canada A-Z | 0 | - | 4.73 | 32,640 |
| European Physical Geography | 0 | - | 4.26 | 33,372 |
| Albania Country Quiz | 0 | - | 4.54 | 38,629 |
| Geography of Russia | 0 | - | 4.57 | 21,424 |
| Czech Republic Country Quiz | 0 | - | 4.52 | 41,842 |
| Slovakia... or Slovenia? | 0 | - | 4.69 | 41,764 |
| Ukraine Country Quiz | 0 | - | 4.42 | 47,294 |
| Hungary Country Quiz | 0 | - | 4.49 | 43,008 |
| Romania Country Quiz | 0 | - | 4.63 | 53,325 |
| Serbia Country Quiz | 0 | - | 4.44 | 34,757 |
| History of Austria | 0 | - | 4.70 | 17,742 |
| Geography of the French Empire | 0 | - | 4.48 | 26,923 |
| The French Revolution | 0 | - | 4.46 | 23,773 |
| France Multiple Choice | 0 | - | 4.38 | 40,629 |
| History of France | 0 | - | 4.59 | 55,973 |
| Biggest Cities in Germany in 1910 | 0 | - | 4.41 | 23,380 |
| Roman Numeral Decoding Quiz | 0 | - | 4.94 | 433,370 |
| Two Letter Roman Numerals | 0 | - | 4.97 | 55,596 |
| The Vikings! | 0 | - | 4.45 | 28,239 |
| Sweden Immigration by Country | 0 | - | 4.55 | 55,680 |
| The Portuguese Empire | 0 | - | 4.54 | 11,987 |
| American to British Word Translation | 0 | - | 4.06 | 117,036 |
| Languages of the United Kingdom | 0 | - | 4.13 | 40,696 |
| The Thirteen Dwarves in the Hobbit | 0 | - | 4.81 | 28,387 |
| Champions League Top 4 | 0 | - | 4.77 | 133,692 |
| East Asia Map Quiz | 0 | - | 4.99 | 1,439,325 |
| Asia Map Quiz | 0 | - | 4.99 | 906,632 |
| A Quiz About Islam | 0 | - | 4.31 | 48,193 |
| Countries That Don't Recognize Israel | 0 | - | 4.63 | 34,422 |
| Popular Royal Names | 0 | - | 4.27 | 124,457 |
| Queen in the Answers | 0 | - | 4.29 | 52,571 |
| Most Common English Verbs - Extreme | 0 | - | 4.96 | 155,748 |
| Countries of Africa | 0 | - | 5.00 | 2,506,472 |
| Landlocked Countries in Africa | 0 | - | 4.99 | 45,778 |
| African East Coast | 0 | - | 4.96 | 95,001 |
| Western Africa Map Quiz | 0 | - | 4.97 | 72,893 |
| Oceanian Capitals - Map Quiz | 0 | - | 4.95 | 49,759 |
| Australia Map Quiz | 0 | - | 4.94 | 342,379 |
| U.S. Geography by Letter - B | 0 | - | 4.53 | 68,526 |
| U.S. Geography by Letter - S | 0 | - | 4.54 | 52,071 |
| U.S. Federal Holidays | 0 | - | 4.33 | 99,086 |
| United States Map Quiz | 0 | - | 4.98 | 4,141,068 |
| Two Letter U.S. State Abbreviations | 0 | - | 4.19 | 743,016 |
| Mediterranean Countries Quiz | 0 | - | 4.99 | 210,029 |
| Countries with Territorial Claims in Antarctica | 0 | - | 4.94 | 92,178 |
