| European Countries by First 2 Letters | 0 | - | 4.95 | 526,664 |
| Most Guessed Cities in Europe - Not Capitals | 0 | - | 4.82 | 86,929 |
| European Geography By Letter - P #1 | 0 | - | 4.81 | 96,437 |
| European Geography By Letter - B #2 | 0 | - | 4.83 | 76,386 |
| Category Elimination - European Geography #3 | 0 | - | 4.85 | 79,925 |
| Federal Subjects of Russia | 0 | - | 4.94 | 144,378 |
| Famous Germans | 0 | - | 4.50 | 54,672 |
| Famous Italians by Clue | 0 | - | 4.45 | 88,621 |
| Count to 10 in Europe: Pro | 0 | - | 4.85 | 68,660 |
| Official European Union Languages | 0 | - | 4.97 | 237,109 |
| European Countries in their Native Language | 0 | - | 4.99 | 156,939 |
| Europe by Borders in 30 Seconds | 0 | - | 4.98 | 425,555 |
| Pre-Euro Currencies | 0 | - | 4.44 | 52,467 |
| Countries that Border Poland | 0 | - | 4.99 | 171,470 |
| Famous Russians | 0 | - | 4.16 | 23,739 |
| Europe Geography Decoder | 0 | - | 4.86 | 69,578 |
| Countries that Beat Switzerland | 0 | - | 4.88 | 41,592 |
| Add A Letter - Make a European City | 0 | - | 4.90 | 23,254 |
| Celtic Nations | 0 | - | 4.69 | 46,834 |
| European Geography By Letter - A | 0 | - | 4.56 | 132,473 |
| European Geography By Letter - B #1 | 0 | - | 4.67 | 110,966 |
| European Geography By Letter - C | 0 | - | 4.46 | 111,920 |
| European Geography By Letter - D | 0 | - | 4.50 | 106,773 |
| European Geography By Letter - L | 0 | - | 4.52 | 112,282 |
| European Geography By Letter - M | 0 | - | 4.61 | 129,017 |
| European Geography By Letter - N | 0 | - | 4.44 | 99,729 |
| European Geography By Letter - R | 0 | - | 4.42 | 92,682 |
| European Geography By Letter - V | 0 | - | 4.43 | 92,062 |
| European Geography By Letter - T | 0 | - | 4.41 | 81,381 |
| European Geography By Letter - S #1 | 0 | - | 4.63 | 99,644 |
| Countries of Europe with an Empty Map | 0 | - | 5.00 | 308,096 |
| All First-Level Subdivisions of Europe on a Map | 0 | - | 4.98 | 168,315 |
| Famous Swiss and Austrian People | 0 | - | 4.45 | 14,560 |
| Famous Dutch and Belgian People | 0 | - | 4.56 | 17,970 |
| Germany Multiple Choice | 0 | - | 4.84 | 54,075 |
| "Big Five" European Soccer Champions Since 2000 | 0 | - | 4.97 | 350,573 |
| U.S. Citizenship Test Questions | 0 | - | 4.83 | 238,460 |
| Catholic Countries in Europe | 0 | - | 4.83 | 94,309 |
| Famous French People | 0 | - | 4.12 | 28,000 |
| States of Germany | 0 | - | 4.96 | 150,365 |
| Germany Immigration by Country | 0 | - | 4.85 | 80,125 |
| Famous Irish People | 0 | - | 4.05 | 45,869 |
| Regions of Italy | 0 | - | 4.92 | 74,853 |
| Netherlands Immigration by Country | 0 | - | 4.94 | 43,910 |
| Famous Nordic People | 0 | - | 4.34 | 19,889 |
| Famous Spaniards Quiz | 0 | - | 4.24 | 11,549 |
| Regions of Spain Quiz | 0 | - | 4.90 | 112,506 |
| Cantons of Switzerland | 0 | - | 4.98 | 50,404 |
| Champions League Winners | 0 | - | 4.92 | 997,474 |
| Asian Geography By Letter - B | 0 | - | 4.85 | 66,067 |
| Biggest Countries in Europe in 1700 | 0 | - | 4.73 | 58,190 |
| Countries That Border Russia | 0 | - | 4.98 | 459,362 |
| States of the German Confederation in 1848 | 0 | - | 4.89 | 31,588 |
| United Kingdom A-Z | 0 | - | 4.53 | 87,284 |
| 10 Closest Megacities to London | 0 | - | 4.90 | 17,559 |
| European Geography By Letter - E | 0 | - | 4.23 | 112,276 |
| European Geography By Letter - F | 0 | - | 4.17 | 91,711 |
| European Geography By Letter - H | 0 | - | 4.30 | 94,944 |
| European Geography By Letter - G | 0 | - | 4.27 | 101,334 |
| European Geography By Letter - I | 0 | - | 4.10 | 94,539 |
| European Geography By Letter - K | 0 | - | 4.14 | 69,204 |
| European Geography By Letter - O | 0 | - | 4.28 | 61,961 |
| European Geography by Letter - W | 0 | - | 4.20 | 82,332 |
| European Geography By Letter - S #2 | 0 | - | 4.19 | 50,547 |
| European Geography A-Z | 0 | - | 4.28 | 49,031 |
| Category Elimination - European Geography #1 | 0 | - | 4.98 | 230,802 |
| European Map without 10 Random Countries | 0 | - | 4.97 | 274,447 |
| Category Elimination - European Geography #2 | 0 | - | 4.99 | 165,377 |
| Russia Country Quiz | 0 | - | 4.85 | 113,739 |
| Croatia Country Quiz | 0 | - | 4.83 | 42,919 |
| Bosnia and Herzegovina Country Quiz | 0 | - | 4.86 | 35,086 |
| Departments of France | 0 | - | 4.93 | 52,953 |
| Countries Surrounding Rome | 0 | - | 4.97 | 49,389 |
| History of The Netherlands | 0 | - | 4.46 | 17,330 |
| Famous Scottish People | 0 | - | 4.22 | 18,336 |
| England or Wales? | 0 | - | 4.94 | 45,372 |
| All UEFA Champions League Teams Ever | 0 | - | 4.85 | 128,679 |
| Famous Australians by Description | 0 | - | 4.23 | 27,675 |
| European Countries with the Fewest Overnight Visitors | 0 | - | 4.78 | 41,609 |
| Word Scramble - European Countries | 0 | - | 4.70 | 141,056 |
| Top 20 Football Clubs in Europe | 0 | - | 4.48 | 113,260 |
| Name a Major European City A-Z | 0 | - | 4.33 | 49,189 |
| 100 Longest Rivers in Europe - with a Map | 0 | - | 4.94 | 64,899 |
| Slavic Languages | 0 | - | 4.67 | 54,027 |
| Poland Country Quiz | 0 | - | 4.22 | 62,762 |
| Russian History A-Z | 0 | - | 4.38 | 31,131 |
| Non-Bordering Countries Closest to Russia | 0 | - | 4.91 | 82,429 |
| Countries that Border Hungary | 0 | - | 4.98 | 103,764 |
| North Macedonia Country Quiz | 0 | - | 4.81 | 27,659 |
| Moldova Country Quiz | 0 | - | 4.81 | 30,570 |
| Countries Bordering Serbia | 0 | - | 4.96 | 91,836 |
| French Geography Quiz #1 | 0 | - | 4.89 | 34,546 |
| France A-Z | 0 | - | 4.16 | 38,077 |
| Letters of the Greek Alphabet | 0 | - | 4.97 | 642,669 |
| Name that Greek Letter | 0 | - | 4.94 | 321,876 |
| Capitals of Italian Regions | 0 | - | 4.62 | 36,448 |
| Spanish Immigration by Country | 0 | - | 4.63 | 55,269 |
| Switzerland A-Z | 0 | - | 4.45 | 25,524 |
| Africa A-Z | 0 | - | 4.57 | 46,400 |
| African Countries by First 2 Letters | 0 | - | 4.96 | 266,699 |
| Top European Languages on a Map | 0 | - | 4.77 | 131,240 |
| History of Russia Quiz | 0 | - | 4.49 | 31,803 |
| Russia Multiple Choice | 0 | - | 4.58 | 40,589 |
| Countries that Beat Russia | 0 | - | 4.84 | 81,993 |
| Countries Bordering Ukraine, with an Empty Map | 0 | - | 4.86 | 95,957 |
| Ancient Greece A-Z | 0 | - | 4.60 | 23,012 |
| The Trojan War | 0 | - | 4.83 | 39,470 |
| Greek Mythology General Knowledge #1 | 0 | - | 4.85 | 110,717 |
| History of Italy | 0 | - | 4.55 | 31,845 |
| Italy Multiple Choice | 0 | - | 4.74 | 103,244 |
| Ancient Roman Trivia #1 | 0 | - | 4.85 | 84,116 |
| Roman Emperors | 0 | - | 4.95 | 118,619 |
| Geography of the Dutch Empire | 0 | - | 4.62 | 34,498 |
| Countries of the Spanish Empire | 0 | - | 4.52 | 77,009 |
| The British Royal Family - Modern Times | 0 | - | 4.16 | 21,479 |
| People on Money - England | 0 | - | 4.29 | 16,570 |
| English Monarchs in Order by First Letter | 0 | - | 4.38 | 31,382 |
| London A-Z | 0 | - | 4.10 | 40,656 |
| Asian Cities A-Z by Clue | 0 | - | 4.51 | 34,574 |
| Asian Countries by First 2 Letters | 0 | - | 4.91 | 277,284 |
| Famous Chinese People | 0 | - | 4.09 | 11,813 |
| Famous Mexicans and Mexican-Americans | 0 | - | 4.15 | 16,911 |
| Major non-NATO U.S. Allies | 0 | - | 4.52 | 51,798 |
| Europe Map Quiz | 0 | - | 5.00 | 4,734,826 |
| Europe Geography Quiz #1 | 0 | - | 4.54 | 71,023 |
| Europe Geography Quiz #2 | 0 | - | 4.57 | 71,655 |
| Europe Geography Quiz #4 | 0 | - | 4.57 | 69,980 |
| Europe Geography Quiz #5 | 0 | - | 4.54 | 61,017 |
| Most Mentioned Allies of Russia | 0 | - | 4.49 | 37,825 |
| Most Mentioned Enemies of Russia | 0 | - | 4.69 | 89,626 |
| Capitals of French Regions | 0 | - | 4.45 | 15,994 |
| Regions of France | 0 | - | 4.78 | 119,433 |
| France Immigration by Country | 0 | - | 4.72 | 76,025 |
| German Groups of Things | 0 | - | 4.46 | 38,323 |
| Capitals of German States | 0 | - | 4.74 | 28,821 |
| Chancellors of Germany, 1949–present | 0 | - | 4.60 | 23,115 |
| Germany True or False? | 0 | - | 4.61 | 48,559 |
| Largest Islands of Greece | 0 | - | 4.59 | 47,532 |
| Olympian Gods Quiz | 0 | - | 4.96 | 496,900 |
| Ancient Greek Words | 0 | - | 4.92 | 110,808 |
| Provinces of the Netherlands | 0 | - | 4.80 | 40,880 |
| 100 Greatest Britons Quiz | 0 | - | 4.41 | 48,083 |
| Foods in a Full English Breakfast | 0 | - | 4.46 | 102,065 |
| Name Every Beatles Song | 0 | - | 4.97 | 234,321 |
| Bohemian Rhapsody Lyrics | 0 | - | 4.98 | 290,454 |
| Asian Geography By Letter - A | 0 | - | 4.64 | 70,866 |
| Asian Geography by Letter - H | 0 | - | 4.49 | 65,431 |
| Asian Geography By Letter - M | 0 | - | 4.47 | 61,192 |
| Asian Geography by Letter - P | 0 | - | 4.45 | 57,600 |
| Asian Geography by Letter - T | 0 | - | 4.50 | 57,110 |
| Asian Geography By Letter - L | 0 | - | 4.49 | 42,754 |
| Middle East A-Z | 0 | - | 4.47 | 45,826 |
| 100 Most Common English Words | 0 | - | 4.88 | 1,306,230 |
| Africa Map Quiz | 0 | - | 5.00 | 2,105,803 |
| Oceania Map Quiz | 0 | - | 4.98 | 636,121 |
| Australian Capitals | 0 | - | 4.92 | 62,601 |
| Canada A-Z | 0 | - | 4.73 | 32,671 |
| European Physical Geography | 0 | - | 4.26 | 33,385 |
| Albania Country Quiz | 0 | - | 4.54 | 38,723 |
| Geography of Russia | 0 | - | 4.57 | 21,440 |
| Czech Republic Country Quiz | 0 | - | 4.52 | 41,908 |
| Slovakia... or Slovenia? | 0 | - | 4.69 | 41,801 |
| Ukraine Country Quiz | 0 | - | 4.42 | 47,370 |
| Hungary Country Quiz | 0 | - | 4.49 | 43,090 |
| Romania Country Quiz | 0 | - | 4.63 | 53,416 |
| Serbia Country Quiz | 0 | - | 4.44 | 34,809 |
| History of Austria | 0 | - | 4.70 | 17,768 |
| Geography of the French Empire | 0 | - | 4.45 | 26,951 |
| The French Revolution | 0 | - | 4.46 | 23,805 |
| France Multiple Choice | 0 | - | 4.38 | 40,647 |
| History of France | 0 | - | 4.59 | 56,212 |
| Biggest Cities in Germany in 1910 | 0 | - | 4.41 | 23,397 |
| Roman Numeral Decoding Quiz | 0 | - | 4.94 | 433,982 |
| Two Letter Roman Numerals | 0 | - | 4.97 | 55,665 |
| The Vikings! | 0 | - | 4.46 | 28,254 |
| Sweden Immigration by Country | 0 | - | 4.55 | 55,732 |
| The Portuguese Empire | 0 | - | 4.54 | 12,001 |
| American to British Word Translation | 0 | - | 4.11 | 135,644 |
| Languages of the United Kingdom | 0 | - | 4.13 | 40,741 |
| The Thirteen Dwarves in the Hobbit | 0 | - | 4.81 | 28,411 |
| Champions League Top 4 | 0 | - | 4.77 | 134,094 |
| East Asia Map Quiz | 0 | - | 4.99 | 1,441,892 |
| Asia Map Quiz | 0 | - | 4.99 | 907,944 |
| A Quiz About Islam | 0 | - | 4.31 | 48,234 |
| Countries That Don't Recognize Israel | 0 | - | 4.63 | 34,490 |
| Most Common English Verbs - Extreme | 0 | - | 4.96 | 155,941 |
| Countries of Africa | 0 | - | 5.00 | 2,511,122 |
| Landlocked Countries in Africa | 0 | - | 4.99 | 45,911 |
| African East Coast | 0 | - | 4.96 | 95,162 |
| Western Africa Map Quiz | 0 | - | 4.97 | 73,033 |
| Oceanian Capitals - Map Quiz | 0 | - | 4.95 | 49,916 |
| Australia Map Quiz | 0 | - | 4.94 | 342,700 |
| U.S. Geography by Letter - B | 0 | - | 4.53 | 68,786 |
| U.S. Geography by Letter - S | 0 | - | 4.54 | 52,291 |
| U.S. Federal Holidays | 0 | - | 4.33 | 99,125 |
| United States Map Quiz | 0 | - | 4.98 | 4,143,603 |
| Two Letter U.S. State Abbreviations | 0 | - | 4.19 | 743,630 |
| Famous Canadians Quiz | 0 | - | 3.94 | 23,368 |
| Mediterranean Countries Quiz | 0 | - | 4.99 | 210,365 |
| Countries with Territorial Claims in Antarctica | 0 | - | 4.94 | 92,319 |
