| Federal Subjects of Russia | 0 | - | 4.94 | 145,109 |
| European Countries by First 2 Letters | 0 | - | 4.95 | 527,579 |
| Most Guessed Cities in Europe - Not Capitals | 0 | - | 4.82 | 87,073 |
| European Geography By Letter - P #1 | 0 | - | 4.81 | 96,598 |
| European Geography By Letter - B #2 | 0 | - | 4.84 | 76,647 |
| Category Elimination - European Geography #3 | 0 | - | 4.85 | 80,271 |
| History of Russia Quiz | 0 | - | 4.49 | 31,836 |
| Count to 10 in Europe: Pro | 0 | - | 4.86 | 68,833 |
| Official European Union Languages | 0 | - | 4.97 | 237,584 |
| European Countries in their Native Language | 0 | - | 4.99 | 157,271 |
| Europe by Borders in 30 Seconds | 0 | - | 4.98 | 426,397 |
| Geography of Russia | 0 | - | 4.57 | 21,473 |
| Pre-Euro Currencies | 0 | - | 4.44 | 52,499 |
| Famous Russians | 0 | - | 4.16 | 23,768 |
| Non-Bordering Countries Closest to Russia | 0 | - | 4.91 | 82,545 |
| Europe Geography Decoder | 0 | - | 4.86 | 69,731 |
| Countries that Beat Switzerland | 0 | - | 4.88 | 41,658 |
| Add A Letter - Make a European City | 0 | - | 4.90 | 23,312 |
| Celtic Nations | 0 | - | 4.69 | 46,868 |
| European Geography By Letter - A | 0 | - | 4.61 | 132,658 |
| European Geography By Letter - B #1 | 0 | - | 4.67 | 111,112 |
| European Geography By Letter - C | 0 | - | 4.46 | 112,093 |
| European Geography By Letter - D | 0 | - | 4.50 | 106,966 |
| European Geography By Letter - L | 0 | - | 4.52 | 112,430 |
| European Geography By Letter - M | 0 | - | 4.64 | 129,287 |
| European Geography By Letter - N | 0 | - | 4.44 | 100,019 |
| European Geography By Letter - R | 0 | - | 4.42 | 92,799 |
| European Geography By Letter - V | 0 | - | 4.43 | 92,429 |
| European Geography By Letter - T | 0 | - | 4.41 | 81,584 |
| European Geography By Letter - S #1 | 0 | - | 4.63 | 99,789 |
| Countries of Europe with an Empty Map | 0 | - | 5.00 | 309,178 |
| All First-Level Subdivisions of Europe on a Map | 0 | - | 4.98 | 169,313 |
| Countries with Territory in the Balkans | 0 | - | 4.96 | 88,683 |
| Eastern Europe Map Quiz | 0 | - | 4.91 | 127,498 |
| Slavic Countries | 0 | - | 4.96 | 111,196 |
| Most Mentioned Allies of Russia | 0 | - | 4.49 | 37,886 |
| Most Mentioned Enemies of Russia | 0 | - | 4.69 | 89,725 |
| Famous Germans | 0 | - | 4.50 | 54,809 |
| Germany Multiple Choice | 0 | - | 4.84 | 54,179 |
| States of the German Confederation in 1848 | 0 | - | 4.89 | 31,726 |
| Famous Italians by Clue | 0 | - | 4.45 | 88,839 |
| "Big Five" European Soccer Champions Since 2000 | 0 | - | 4.97 | 352,294 |
| U.S. Citizenship Test Questions | 0 | - | 4.83 | 238,769 |
| Catholic Countries in Europe | 0 | - | 4.83 | 94,553 |
| Word Chain - Russia | 0 | - | 4.33 | 15,718 |
| Countries Formerly in Yugoslavia | 0 | - | 4.95 | 124,498 |
| States of Germany | 0 | - | 4.96 | 150,983 |
| Germany Immigration by Country | 0 | - | 4.85 | 80,319 |
| Regions of Italy | 0 | - | 4.92 | 75,135 |
| Netherlands Immigration by Country | 0 | - | 4.94 | 44,078 |
| Regions of Spain Quiz | 0 | - | 4.90 | 113,108 |
| Cantons of Switzerland | 0 | - | 4.98 | 50,686 |
| Champions League Winners | 0 | - | 4.92 | 1,000,296 |
| Asian Geography By Letter - B | 0 | - | 4.85 | 66,164 |
| Biggest Countries in Europe in 1700 | 0 | - | 4.73 | 58,284 |
| Countries That Border Russia | 0 | - | 4.98 | 460,193 |
| United Kingdom A-Z | 0 | - | 4.53 | 87,411 |
| 10 Closest Megacities to London | 0 | - | 4.90 | 17,611 |
| European Geography By Letter - E | 0 | - | 4.23 | 112,418 |
| European Geography By Letter - F | 0 | - | 4.17 | 91,843 |
| European Geography By Letter - H | 0 | - | 4.30 | 95,084 |
| European Geography By Letter - G | 0 | - | 4.27 | 101,708 |
| European Geography By Letter - I | 0 | - | 4.10 | 94,665 |
| European Geography By Letter - K | 0 | - | 4.14 | 69,352 |
| European Geography By Letter - O | 0 | - | 4.28 | 62,078 |
| European Geography by Letter - W | 0 | - | 4.20 | 82,419 |
| European Geography By Letter - S #2 | 0 | - | 4.19 | 50,642 |
| European Geography A-Z | 0 | - | 4.29 | 49,098 |
| Category Elimination - European Geography #1 | 0 | - | 4.98 | 231,637 |
| European Map without 10 Random Countries | 0 | - | 4.97 | 275,637 |
| Category Elimination - European Geography #2 | 0 | - | 4.99 | 165,985 |
| Russia Country Quiz | 0 | - | 4.85 | 114,007 |
| Croatia Country Quiz | 0 | - | 4.83 | 43,062 |
| Bosnia and Herzegovina Country Quiz | 0 | - | 4.86 | 35,178 |
| Departments of France | 0 | - | 4.93 | 53,215 |
| Countries Surrounding Rome | 0 | - | 4.97 | 49,424 |
| History of The Netherlands | 0 | - | 4.46 | 17,352 |
| England or Wales? | 0 | - | 4.94 | 45,473 |
| All UEFA Champions League Teams Ever | 0 | - | 4.85 | 129,164 |
| European Countries with the Fewest Overnight Visitors | 0 | - | 4.78 | 41,625 |
| Word Scramble - European Countries | 0 | - | 4.70 | 141,249 |
| Top 20 Football Clubs in Europe | 0 | - | 4.48 | 113,778 |
| Name a Major European City A-Z | 0 | - | 4.33 | 49,294 |
| 100 Longest Rivers in Europe - with a Map | 0 | - | 4.94 | 65,094 |
| Slavic Languages | 0 | - | 4.68 | 54,141 |
| Countries that Border Hungary | 0 | - | 4.98 | 103,911 |
| North Macedonia Country Quiz | 0 | - | 4.81 | 27,715 |
| Moldova Country Quiz | 0 | - | 4.81 | 30,643 |
| French Geography Quiz #1 | 0 | - | 4.89 | 34,620 |
| Famous Swiss and Austrian People | 0 | - | 4.45 | 14,585 |
| Famous Dutch and Belgian People | 0 | - | 4.56 | 17,995 |
| France A-Z | 0 | - | 4.16 | 38,107 |
| Letters of the Greek Alphabet | 0 | - | 4.97 | 644,304 |
| Name that Greek Letter | 0 | - | 4.93 | 322,453 |
| Capitals of Italian Regions | 0 | - | 4.62 | 36,515 |
| Spanish Immigration by Country | 0 | - | 4.63 | 55,327 |
| Switzerland A-Z | 0 | - | 4.45 | 25,568 |
| Africa A-Z | 0 | - | 4.57 | 46,486 |
| African Countries by First 2 Letters | 0 | - | 4.96 | 267,308 |
| Top European Languages on a Map | 0 | - | 4.77 | 131,535 |
| Embarrassing Chapters in Russian History | 0 | - | 3.70 | 20,262 |
| Russia Multiple Choice | 0 | - | 4.58 | 40,630 |
| Countries Bordering Ukraine, with an Empty Map | 0 | - | 4.86 | 96,115 |
| Famous French People | 0 | - | 4.12 | 28,122 |
| Ancient Greece A-Z | 0 | - | 4.60 | 23,068 |
| The Trojan War | 0 | - | 4.83 | 39,549 |
| Greek Mythology General Knowledge #1 | 0 | - | 4.85 | 111,105 |
| Famous Irish People | 0 | - | 4.05 | 45,902 |
| History of Italy | 0 | - | 4.55 | 31,892 |
| Italy Multiple Choice | 0 | - | 4.73 | 103,412 |
| Ancient Roman Trivia #1 | 0 | - | 4.85 | 84,256 |
| Roman Emperors | 0 | - | 4.95 | 119,151 |
| Geography of the Dutch Empire | 0 | - | 4.62 | 34,553 |
| Famous Nordic People | 0 | - | 4.34 | 19,970 |
| Famous Spaniards Quiz | 0 | - | 4.24 | 11,564 |
| Countries of the Spanish Empire | 0 | - | 4.52 | 77,081 |
| The British Royal Family - Modern Times | 0 | - | 4.16 | 21,495 |
| People on Money - England | 0 | - | 4.29 | 16,587 |
| English Monarchs in Order by First Letter | 0 | - | 4.38 | 31,492 |
| London A-Z | 0 | - | 4.10 | 40,692 |
| Zone 1 London Underground Stations - With a Map | 0 | - | 4.90 | 52,137 |
| Asian Cities A-Z by Clue | 0 | - | 4.52 | 35,108 |
| Asian Countries by First 2 Letters | 0 | - | 4.91 | 278,085 |
| Major non-NATO U.S. Allies | 0 | - | 4.52 | 51,928 |
| Europe Map Quiz | 0 | - | 5.00 | 4,744,158 |
| Europe Geography Quiz #1 | 0 | - | 4.54 | 71,109 |
| Europe Geography Quiz #2 | 0 | - | 4.57 | 71,751 |
| Europe Geography Quiz #4 | 0 | - | 4.57 | 70,062 |
| Europe Geography Quiz #5 | 0 | - | 4.54 | 61,101 |
| Capitals of French Regions | 0 | - | 4.45 | 16,015 |
| Regions of France | 0 | - | 4.77 | 119,878 |
| France Immigration by Country | 0 | - | 4.72 | 76,159 |
| German Groups of Things | 0 | - | 4.46 | 38,373 |
| Capitals of German States | 0 | - | 4.74 | 28,887 |
| Chancellors of Germany, 1949–present | 0 | - | 4.60 | 23,183 |
| Germany True or False? | 0 | - | 4.61 | 48,652 |
| Largest Islands of Greece | 0 | - | 4.59 | 47,699 |
| Olympian Gods Quiz | 0 | - | 4.96 | 498,154 |
| Ancient Greek Words | 0 | - | 4.93 | 111,057 |
| Provinces of the Netherlands | 0 | - | 4.80 | 41,024 |
| 100 Greatest Britons Quiz | 0 | - | 4.41 | 48,142 |
| Foods in a Full English Breakfast | 0 | - | 4.46 | 102,806 |
| Name Every Beatles Song | 0 | - | 4.97 | 234,941 |
| Bohemian Rhapsody Lyrics | 0 | - | 4.98 | 291,090 |
| Famous Scottish People | 0 | - | 4.22 | 18,351 |
| Asian Geography By Letter - A | 0 | - | 4.64 | 70,942 |
| Asian Geography by Letter - H | 0 | - | 4.49 | 65,512 |
| Asian Geography By Letter - M | 0 | - | 4.47 | 61,247 |
| Asian Geography by Letter - P | 0 | - | 4.45 | 57,696 |
| Asian Geography by Letter - T | 0 | - | 4.50 | 57,175 |
| Asian Geography By Letter - L | 0 | - | 4.49 | 42,816 |
| Middle East A-Z | 0 | - | 4.47 | 45,907 |
| 100 Most Common English Words | 0 | - | 4.88 | 1,309,700 |
| Africa Map Quiz | 0 | - | 5.00 | 2,110,027 |
| Oceania Map Quiz | 0 | - | 4.98 | 638,212 |
| Australian Capitals | 0 | - | 4.92 | 62,650 |
| Canada A-Z | 0 | - | 4.73 | 32,716 |
| European Physical Geography | 0 | - | 4.26 | 33,417 |
| Russian History A-Z | 0 | - | 4.38 | 31,372 |
| Czech Republic Country Quiz | 0 | - | 4.52 | 42,008 |
| Slovakia... or Slovenia? | 0 | - | 4.69 | 41,844 |
| Ukraine Country Quiz | 0 | - | 4.42 | 47,477 |
| Hungary Country Quiz | 0 | - | 4.49 | 43,201 |
| Romania Country Quiz | 0 | - | 4.63 | 53,554 |
| History of Austria | 0 | - | 4.70 | 17,794 |
| Geography of the French Empire | 0 | - | 4.45 | 26,989 |
| The French Revolution | 0 | - | 4.46 | 23,856 |
| France Multiple Choice | 0 | - | 4.38 | 40,675 |
| History of France | 0 | - | 4.59 | 56,565 |
| Biggest Cities in Germany in 1910 | 0 | - | 4.41 | 23,422 |
| Roman Numeral Decoding Quiz | 0 | - | 4.94 | 434,987 |
| Two Letter Roman Numerals | 0 | - | 4.97 | 55,818 |
| The Vikings! | 0 | - | 4.46 | 28,282 |
| Sweden Immigration by Country | 0 | - | 4.55 | 55,805 |
| The Portuguese Empire | 0 | - | 4.58 | 12,026 |
| American to British Word Translation | 0 | - | 4.13 | 138,172 |
| Languages of the United Kingdom | 0 | - | 4.13 | 40,799 |
| The Thirteen Dwarves in the Hobbit | 0 | - | 4.81 | 28,447 |
| Champions League Top 4 | 0 | - | 4.77 | 134,847 |
| East Asia Map Quiz | 0 | - | 4.99 | 1,443,680 |
| Asia Map Quiz | 0 | - | 4.99 | 910,479 |
| A Quiz About Islam | 0 | - | 4.31 | 48,311 |
| Countries That Don't Recognize Israel | 0 | - | 4.63 | 34,612 |
| Most Common English Verbs - Extreme | 0 | - | 4.96 | 156,348 |
| Countries of Africa | 0 | - | 5.00 | 2,519,758 |
| Landlocked Countries in Africa | 0 | - | 4.99 | 46,215 |
| African East Coast | 0 | - | 4.96 | 95,465 |
| Western Africa Map Quiz | 0 | - | 4.97 | 73,324 |
| Oceanian Capitals - Map Quiz | 0 | - | 4.95 | 50,155 |
| Australia Map Quiz | 0 | - | 4.94 | 343,180 |
| U.S. Geography by Letter - B | 0 | - | 4.53 | 68,958 |
| U.S. Geography by Letter - S | 0 | - | 4.55 | 52,447 |
| U.S. Federal Holidays | 0 | - | 4.33 | 99,225 |
| United States Map Quiz | 0 | - | 4.98 | 4,147,677 |
| Two Letter U.S. State Abbreviations | 0 | - | 4.19 | 745,050 |
| Mediterranean Countries Quiz | 0 | - | 4.99 | 210,975 |
| Countries with Territorial Claims in Antarctica | 0 | - | 4.94 | 92,439 |
| Countries That Use the Euro | 0 | - | 4.95 | 103,813 |
| Europe Cities Map Quiz | 0 | - | 4.99 | 363,116 |
| Europe Geography Quiz #3 | 0 | - | 4.34 | 63,504 |
