| Federal Subjects of Russia | 0 | - | 4.94 | 144,705 |
| Most Guessed Cities in Europe - Not Capitals | 0 | - | 4.82 | 86,976 |
| European Countries by First 2 Letters | 0 | - | 4.95 | 526,973 |
| European Geography By Letter - P #1 | 0 | - | 4.81 | 96,520 |
| European Geography By Letter - B #2 | 0 | - | 4.84 | 76,513 |
| Category Elimination - European Geography #3 | 0 | - | 4.85 | 80,060 |
| History of Russia Quiz | 0 | - | 4.49 | 31,819 |
| Save Europeans by Guessing Countries | 0 | - | 4.84 | 210,330 |
| Count to 10 in Europe: Pro | 0 | - | 4.86 | 68,737 |
| Official European Union Languages | 0 | - | 4.97 | 237,296 |
| European Countries in their Native Language | 0 | - | 4.99 | 157,113 |
| Europe by Borders in 30 Seconds | 0 | - | 4.98 | 425,905 |
| Geography of Russia | 0 | - | 4.57 | 21,453 |
| Non-Bordering Countries Closest to Russia | 0 | - | 4.91 | 82,475 |
| Pre-Euro Currencies | 0 | - | 4.44 | 52,484 |
| Famous Russians | 0 | - | 4.16 | 23,752 |
| Europe Geography Decoder | 0 | - | 4.86 | 69,633 |
| Countries that Beat Switzerland | 0 | - | 4.88 | 41,623 |
| Countries of Europe with an Empty Map | 0 | - | 5.00 | 308,670 |
| All First-Level Subdivisions of Europe on a Map | 0 | - | 4.98 | 168,830 |
| Countries with Territory in the Balkans | 0 | - | 4.96 | 88,516 |
| Eastern Europe Map Quiz | 0 | - | 4.91 | 127,373 |
| Slavic Countries | 0 | - | 4.96 | 111,058 |
| Germany Multiple Choice | 0 | - | 4.84 | 54,129 |
| States of the German Confederation in 1848 | 0 | - | 4.89 | 31,645 |
| "Big Five" European Soccer Champions Since 2000 | 0 | - | 4.97 | 351,342 |
| Add A Letter - Make a European City | 0 | - | 4.90 | 23,264 |
| Celtic Nations | 0 | - | 4.69 | 46,841 |
| European Geography By Letter - A | 0 | - | 4.61 | 132,583 |
| European Geography By Letter - B #1 | 0 | - | 4.67 | 111,045 |
| European Geography By Letter - C | 0 | - | 4.46 | 112,009 |
| European Geography By Letter - D | 0 | - | 4.50 | 106,889 |
| European Geography By Letter - L | 0 | - | 4.52 | 112,366 |
| European Geography By Letter - M | 0 | - | 4.64 | 129,150 |
| European Geography By Letter - N | 0 | - | 4.44 | 99,966 |
| European Geography By Letter - R | 0 | - | 4.42 | 92,739 |
| European Geography By Letter - V | 0 | - | 4.43 | 92,111 |
| European Geography By Letter - T | 0 | - | 4.41 | 81,474 |
| European Geography By Letter - S #1 | 0 | - | 4.63 | 99,713 |
| Most Mentioned Allies of Russia | 0 | - | 4.49 | 37,853 |
| Most Mentioned Enemies of Russia | 0 | - | 4.69 | 89,664 |
| Famous Germans | 0 | - | 4.50 | 54,740 |
| Famous Italians by Clue | 0 | - | 4.45 | 88,727 |
| Champions League Winners | 0 | - | 4.92 | 998,635 |
| U.S. Citizenship Test Questions | 0 | - | 4.83 | 238,565 |
| Catholic Countries in Europe | 0 | - | 4.83 | 94,410 |
| Word Chain - Russia | 0 | - | 4.33 | 15,701 |
| Countries That Border Russia | 0 | - | 4.98 | 459,784 |
| Countries Formerly in Yugoslavia | 0 | - | 4.95 | 124,361 |
| States of Germany | 0 | - | 4.96 | 150,659 |
| Germany Immigration by Country | 0 | - | 4.85 | 80,204 |
| Regions of Italy | 0 | - | 4.92 | 74,972 |
| Netherlands Immigration by Country | 0 | - | 4.94 | 43,989 |
| Regions of Spain Quiz | 0 | - | 4.90 | 112,784 |
| Cantons of Switzerland | 0 | - | 4.98 | 50,529 |
| United Kingdom A-Z | 0 | - | 4.53 | 87,350 |
| 10 Closest Megacities to London | 0 | - | 4.90 | 17,581 |
| Asian Geography By Letter - B | 0 | - | 4.85 | 66,118 |
| European Geography By Letter - E | 0 | - | 4.23 | 112,350 |
| European Geography By Letter - F | 0 | - | 4.17 | 91,788 |
| European Geography By Letter - H | 0 | - | 4.30 | 95,026 |
| European Geography By Letter - G | 0 | - | 4.27 | 101,644 |
| European Geography By Letter - I | 0 | - | 4.10 | 94,613 |
| European Geography By Letter - K | 0 | - | 4.14 | 69,297 |
| European Geography By Letter - O | 0 | - | 4.28 | 62,028 |
| European Geography by Letter - W | 0 | - | 4.20 | 82,368 |
| European Geography By Letter - S #2 | 0 | - | 4.19 | 50,592 |
| European Geography A-Z | 0 | - | 4.28 | 49,058 |
| Biggest Countries in Europe in 1700 | 0 | - | 4.73 | 58,223 |
| Category Elimination - European Geography #1 | 0 | - | 4.98 | 231,114 |
| European Map without 10 Random Countries | 0 | - | 4.97 | 274,707 |
| Category Elimination - European Geography #2 | 0 | - | 4.99 | 165,617 |
| Russia Country Quiz | 0 | - | 4.85 | 113,840 |
| Croatia Country Quiz | 0 | - | 4.83 | 42,978 |
| Bosnia and Herzegovina Country Quiz | 0 | - | 4.86 | 35,124 |
| Departments of France | 0 | - | 4.93 | 53,065 |
| The Mafia Quiz | 0 | - | 4.46 | 23,224 |
| Countries Surrounding Rome | 0 | - | 4.97 | 49,408 |
| History of The Netherlands | 0 | - | 4.46 | 17,345 |
| England or Wales? | 0 | - | 4.94 | 45,416 |
| All UEFA Champions League Teams Ever | 0 | - | 4.85 | 128,869 |
| European Countries with the Fewest Overnight Visitors | 0 | - | 4.78 | 41,614 |
| Word Scramble - European Countries | 0 | - | 4.70 | 141,124 |
| Top 20 Football Clubs in Europe | 0 | - | 4.48 | 113,490 |
| Name a Major European City A-Z | 0 | - | 4.33 | 49,232 |
| 100 Longest Rivers in Europe - with a Map | 0 | - | 4.94 | 64,997 |
| Slavic Languages | 0 | - | 4.68 | 54,074 |
| Countries that Border Hungary | 0 | - | 4.98 | 103,828 |
| North Macedonia Country Quiz | 0 | - | 4.81 | 27,679 |
| Moldova Country Quiz | 0 | - | 4.81 | 30,607 |
| French Geography Quiz #1 | 0 | - | 4.89 | 34,573 |
| Famous Swiss and Austrian People | 0 | - | 4.45 | 14,571 |
| Famous Dutch and Belgian People | 0 | - | 4.56 | 17,983 |
| France A-Z | 0 | - | 4.16 | 38,094 |
| Country Quiz on a Map - France | 0 | - | 4.98 | 46,730 |
| The Trojan War | 0 | - | 4.83 | 39,501 |
| Letters of the Greek Alphabet | 0 | - | 4.97 | 643,372 |
| Name that Greek Letter | 0 | - | 4.94 | 322,121 |
| Greek Mythology General Knowledge #1 | 0 | - | 4.85 | 110,887 |
| Capitals of Italian Regions | 0 | - | 4.62 | 36,485 |
| Ancient Roman Trivia #1 | 0 | - | 4.85 | 84,174 |
| Roman Emperors | 0 | - | 4.95 | 118,816 |
| Spanish Immigration by Country | 0 | - | 4.63 | 55,294 |
| Switzerland A-Z | 0 | - | 4.45 | 25,544 |
| Africa A-Z | 0 | - | 4.57 | 46,428 |
| Top European Languages on a Map | 0 | - | 4.77 | 131,371 |
| Embarrassing Chapters in Russian History | 0 | - | 3.70 | 20,252 |
| Russia Multiple Choice | 0 | - | 4.58 | 40,608 |
| Countries Bordering Ukraine, with an Empty Map | 0 | - | 4.86 | 96,027 |
| Famous French People | 0 | - | 4.12 | 28,075 |
| Ancient Greece A-Z | 0 | - | 4.60 | 23,042 |
| Olympian Gods Quiz | 0 | - | 4.96 | 497,471 |
| Famous Irish People | 0 | - | 4.05 | 45,885 |
| History of Italy | 0 | - | 4.55 | 31,864 |
| Italy Multiple Choice | 0 | - | 4.73 | 103,325 |
| Geography of the Dutch Empire | 0 | - | 4.62 | 34,524 |
| Famous Nordic People | 0 | - | 4.34 | 19,927 |
| Famous Spaniards Quiz | 0 | - | 4.24 | 11,557 |
| Countries of the Spanish Empire | 0 | - | 4.52 | 77,037 |
| The British Royal Family - Modern Times | 0 | - | 4.16 | 21,484 |
| People on Money - England | 0 | - | 4.29 | 16,576 |
| English Monarchs in Order by First Letter | 0 | - | 4.38 | 31,437 |
| London A-Z | 0 | - | 4.10 | 40,673 |
| Asian Cities A-Z by Clue | 0 | - | 4.51 | 34,875 |
| African Countries by First 2 Letters | 0 | - | 4.96 | 266,854 |
| Major non-NATO U.S. Allies | 0 | - | 4.52 | 51,852 |
| Europe Map Quiz | 0 | - | 5.00 | 4,739,135 |
| Europe Geography Quiz #1 | 0 | - | 4.54 | 71,057 |
| Europe Geography Quiz #2 | 0 | - | 4.57 | 71,699 |
| Europe Geography Quiz #4 | 0 | - | 4.57 | 70,015 |
| Europe Geography Quiz #5 | 0 | - | 4.54 | 61,055 |
| Four Letter European Geography #1 | 0 | - | 4.44 | 27,273 |
| Four Letter European Geography #2 | 0 | - | 4.57 | 19,718 |
| Capitals of French Regions | 0 | - | 4.45 | 16,006 |
| Regions of France | 0 | - | 4.78 | 119,641 |
| France Immigration by Country | 0 | - | 4.72 | 76,078 |
| German Groups of Things | 0 | - | 4.46 | 38,349 |
| Capitals of German States | 0 | - | 4.74 | 28,866 |
| Chancellors of Germany, 1949–present | 0 | - | 4.60 | 23,152 |
| Germany True or False? | 0 | - | 4.61 | 48,606 |
| Largest Islands of Greece | 0 | - | 4.59 | 47,613 |
| Ancient Greek Words | 0 | - | 4.92 | 110,924 |
| Two Letter Roman Numerals | 0 | - | 4.97 | 55,732 |
| Provinces of the Netherlands | 0 | - | 4.80 | 40,948 |
| 100 Greatest Britons Quiz | 0 | - | 4.41 | 48,101 |
| Foods in a Full English Breakfast | 0 | - | 4.46 | 102,154 |
| The Thirteen Dwarves in the Hobbit | 0 | - | 4.81 | 28,426 |
| Name Every Beatles Song | 0 | - | 4.97 | 234,600 |
| Bohemian Rhapsody Lyrics | 0 | - | 4.98 | 290,606 |
| Famous Scottish People | 0 | - | 4.22 | 18,343 |
| Asian Geography By Letter - A | 0 | - | 4.64 | 70,898 |
| Asian Geography by Letter - H | 0 | - | 4.49 | 65,469 |
| Asian Geography By Letter - M | 0 | - | 4.47 | 61,224 |
| Asian Geography by Letter - P | 0 | - | 4.45 | 57,644 |
| Asian Geography by Letter - T | 0 | - | 4.50 | 57,142 |
| Asian Countries by First 2 Letters | 0 | - | 4.91 | 277,809 |
| Asian Geography By Letter - L | 0 | - | 4.49 | 42,781 |
| Middle East A-Z | 0 | - | 4.47 | 45,867 |
| 100 Most Common English Words | 0 | - | 4.88 | 1,307,695 |
| Africa Map Quiz | 0 | - | 5.00 | 2,107,507 |
| Oceania Map Quiz | 0 | - | 4.98 | 636,985 |
| Australian Capitals | 0 | - | 4.92 | 62,614 |
| Canada A-Z | 0 | - | 4.73 | 32,692 |
| European Physical Geography | 0 | - | 4.26 | 33,399 |
| Russian History A-Z | 0 | - | 4.38 | 31,244 |
| Czech Republic Country Quiz | 0 | - | 4.52 | 41,949 |
| Slovakia... or Slovenia? | 0 | - | 4.69 | 41,819 |
| Ukraine Country Quiz | 0 | - | 4.42 | 47,420 |
| Hungary Country Quiz | 0 | - | 4.49 | 43,130 |
| Romania Country Quiz | 0 | - | 4.63 | 53,489 |
| History of Austria | 0 | - | 4.70 | 17,779 |
| Geography of the French Empire | 0 | - | 4.45 | 26,965 |
| The French Revolution | 0 | - | 4.46 | 23,832 |
| France Multiple Choice | 0 | - | 4.38 | 40,662 |
| History of France | 0 | - | 4.59 | 56,387 |
| Biggest Cities in Germany in 1910 | 0 | - | 4.41 | 23,409 |
| Figures from Greek Mythology | 0 | - | 4.91 | 185,453 |
| Roman Numeral Decoding Quiz | 0 | - | 4.94 | 434,460 |
| The Vikings! | 0 | - | 4.46 | 28,268 |
| Sweden Immigration by Country | 0 | - | 4.55 | 55,763 |
| The Portuguese Empire | 0 | - | 4.54 | 12,008 |
| American to British Word Translation | 0 | - | 4.13 | 137,335 |
| Languages of the United Kingdom | 0 | - | 4.13 | 40,772 |
| Champions League Top 4 | 0 | - | 4.77 | 134,396 |
| East Asia Map Quiz | 0 | - | 4.99 | 1,442,577 |
| Asia Map Quiz | 0 | - | 4.99 | 908,912 |
| A Quiz About Islam | 0 | - | 4.31 | 48,261 |
| Countries That Don't Recognize Israel | 0 | - | 4.63 | 34,543 |
| Most Common English Verbs - Extreme | 0 | - | 4.96 | 156,104 |
| Countries of Africa | 0 | - | 5.00 | 2,514,738 |
| Landlocked Countries in Africa | 0 | - | 4.99 | 46,026 |
| African East Coast | 0 | - | 4.96 | 95,290 |
| Western Africa Map Quiz | 0 | - | 4.97 | 73,182 |
| Oceanian Capitals - Map Quiz | 0 | - | 4.95 | 50,038 |
| Australia Map Quiz | 0 | - | 4.94 | 342,896 |
| U.S. Geography by Letter - B | 0 | - | 4.53 | 68,901 |
| U.S. Geography by Letter - S | 0 | - | 4.55 | 52,394 |
| U.S. Federal Holidays | 0 | - | 4.33 | 99,151 |
| United States Map Quiz | 0 | - | 4.98 | 4,145,357 |
| Two Letter U.S. State Abbreviations | 0 | - | 4.19 | 744,174 |
