| Federal Subjects of Russia | 0 | - | 4.95 | 147,785 |
| Most Guessed Cities in Europe - Not Capitals | 0 | - | 4.82 | 87,487 |
| European Countries by First 2 Letters | 0 | - | 4.95 | 530,224 |
| European Geography By Letter - B #2 | 0 | - | 4.84 | 78,823 |
| Category Elimination - European Geography #3 | 0 | - | 4.86 | 81,194 |
| History of Russia Quiz | 0 | - | 4.47 | 31,943 |
| Save Europeans by Guessing Countries | 0 | - | 4.86 | 214,268 |
| Count to 10 in Europe: Pro | 0 | - | 4.86 | 69,270 |
| Official European Union Languages | 0 | - | 4.97 | 238,796 |
| European Countries in their Native Language | 0 | - | 4.99 | 158,045 |
| Europe by Borders in 30 Seconds | 0 | - | 4.98 | 428,741 |
| Geography of Russia | 0 | - | 4.57 | 21,550 |
| Non-Bordering Countries Closest to Russia | 0 | - | 4.91 | 82,937 |
| Pre-Euro Currencies | 0 | - | 4.44 | 52,629 |
| Famous Russians | 0 | - | 4.16 | 23,856 |
| Europe Geography Decoder | 0 | - | 4.86 | 70,068 |
| Countries that Beat Switzerland | 0 | - | 4.88 | 41,891 |
| Countries of Europe with an Empty Map | 0 | - | 5.00 | 310,998 |
| All First-Level Subdivisions of Europe on a Map | 0 | - | 4.98 | 172,547 |
| Countries with Territory in the Balkans | 0 | - | 4.96 | 89,478 |
| Eastern Europe Map Quiz | 0 | - | 4.91 | 128,335 |
| Slavic Countries | 0 | - | 4.96 | 111,815 |
| Germany Multiple Choice | 0 | - | 4.84 | 54,424 |
| States of the German Confederation in 1848 | 0 | - | 4.89 | 32,143 |
| "Big Five" European Soccer Champions Since 2000 | 0 | - | 4.97 | 357,522 |
| Add A Letter - Make a European City | 0 | - | 4.90 | 23,412 |
| Celtic Nations | 0 | - | 4.69 | 46,975 |
| European Geography By Letter - A | 0 | - | 4.52 | 146,522 |
| European Geography By Letter - B #1 | 0 | - | 4.67 | 119,959 |
| European Geography By Letter - C | 0 | - | 4.46 | 114,216 |
| European Geography By Letter - D | 0 | - | 4.50 | 108,831 |
| European Geography By Letter - L | 0 | - | 4.52 | 113,670 |
| European Geography By Letter - M | 0 | - | 4.67 | 130,891 |
| European Geography By Letter - P #1 | 0 | - | 4.80 | 97,680 |
| European Geography By Letter - N | 0 | - | 4.44 | 100,979 |
| European Geography By Letter - R | 0 | - | 4.42 | 93,826 |
| European Geography By Letter - V | 0 | - | 4.42 | 93,120 |
| European Geography By Letter - T | 0 | - | 4.41 | 82,586 |
| European Geography By Letter - S #1 | 0 | - | 4.62 | 100,717 |
| Most Mentioned Allies of Russia | 0 | - | 4.49 | 38,064 |
| Most Mentioned Enemies of Russia | 0 | - | 4.69 | 90,097 |
| Famous Germans | 0 | - | 4.50 | 55,466 |
| Famous Italians by Clue | 0 | - | 4.45 | 89,682 |
| Champions League Winners | 0 | - | 4.91 | 1,008,896 |
| U.S. Citizenship Test Questions | 0 | - | 4.83 | 239,656 |
| Catholic Countries in Europe | 0 | - | 4.83 | 95,304 |
| Word Chain - Russia | 0 | - | 4.33 | 15,770 |
| Countries That Border Russia | 0 | - | 4.98 | 462,499 |
| Countries Formerly in Yugoslavia | 0 | - | 4.95 | 125,028 |
| States of Germany | 0 | - | 4.95 | 152,972 |
| Germany Immigration by Country | 0 | - | 4.85 | 81,209 |
| Regions of Italy | 0 | - | 4.92 | 76,125 |
| Netherlands Immigration by Country | 0 | - | 4.93 | 52,352 |
| Regions of Spain Quiz | 0 | - | 4.90 | 114,224 |
| Cantons of Switzerland | 0 | - | 4.98 | 51,339 |
| United Kingdom A-Z | 0 | - | 4.52 | 88,119 |
| 10 Closest Megacities to London | 0 | - | 4.90 | 17,730 |
| Asian Geography By Letter - B | 0 | - | 4.85 | 66,598 |
| European Geography By Letter - E | 0 | - | 4.23 | 113,924 |
| European Geography By Letter - F | 0 | - | 4.17 | 93,278 |
| European Geography By Letter - H | 0 | - | 4.30 | 96,185 |
| European Geography By Letter - G | 0 | - | 4.27 | 102,875 |
| European Geography By Letter - I | 0 | - | 4.10 | 95,660 |
| European Geography By Letter - K | 0 | - | 4.14 | 70,296 |
| European Geography By Letter - O | 0 | - | 4.28 | 62,839 |
| European Geography by Letter - W | 0 | - | 4.20 | 83,010 |
| European Geography By Letter - S #2 | 0 | - | 4.19 | 51,285 |
| European Geography A-Z | 0 | - | 4.29 | 49,342 |
| Biggest Countries in Europe in 1700 | 0 | - | 4.73 | 58,547 |
| Category Elimination - European Geography #1 | 0 | - | 4.98 | 233,718 |
| European Map without 10 Random Countries | 0 | - | 4.97 | 277,200 |
| Category Elimination - European Geography #2 | 0 | - | 4.99 | 167,449 |
| Russia Country Quiz | 0 | - | 4.83 | 114,628 |
| Croatia Country Quiz | 0 | - | 4.83 | 43,432 |
| Bosnia and Herzegovina Country Quiz | 0 | - | 4.86 | 35,398 |
| Famous French People | 0 | - | 4.07 | 35,770 |
| Departments of France | 0 | - | 4.93 | 54,353 |
| The Mafia Quiz | 0 | - | 4.46 | 23,359 |
| Countries Surrounding Rome | 0 | - | 4.97 | 49,593 |
| History of The Netherlands | 0 | - | 4.46 | 17,466 |
| English Monarchs in Order by First Letter | 0 | - | 4.38 | 31,899 |
| England or Wales? | 0 | - | 4.94 | 45,765 |
| All UEFA Champions League Teams Ever | 0 | - | 4.85 | 130,829 |
| European Countries with the Fewest Overnight Visitors | 0 | - | 4.80 | 41,669 |
| Word Scramble - European Countries | 0 | - | 4.73 | 141,816 |
| Top 20 Football Clubs in Europe | 0 | - | 4.48 | 115,421 |
| Name a Major European City A-Z | 0 | - | 4.33 | 49,614 |
| 100 Longest Rivers in Europe - with a Map | 0 | - | 4.94 | 65,574 |
| Slavic Languages | 0 | - | 4.68 | 54,433 |
| Countries that Border Hungary | 0 | - | 4.98 | 104,356 |
| North Macedonia Country Quiz | 0 | - | 4.81 | 27,910 |
| Moldova Country Quiz | 0 | - | 4.82 | 30,864 |
| French Geography Quiz #1 | 0 | - | 4.89 | 34,833 |
| Famous Swiss and Austrian People | 0 | - | 4.45 | 14,634 |
| Famous Dutch and Belgian People | 0 | - | 4.56 | 18,079 |
| France A-Z | 0 | - | 4.16 | 38,243 |
| Country Quiz on a Map - France | 0 | - | 4.98 | 47,318 |
| The Trojan War | 0 | - | 4.83 | 39,776 |
| Letters of the Greek Alphabet | 0 | - | 4.97 | 648,414 |
| Name that Greek Letter | 0 | - | 4.93 | 324,068 |
| Greek Mythology General Knowledge #1 | 0 | - | 4.85 | 112,085 |
| Capitals of Italian Regions | 0 | - | 4.62 | 36,643 |
| Ancient Roman Trivia #1 | 0 | - | 4.85 | 84,611 |
| Roman Emperors | 0 | - | 4.95 | 120,287 |
| Spanish Immigration by Country | 0 | - | 4.63 | 55,504 |
| Switzerland A-Z | 0 | - | 4.45 | 25,671 |
| Africa A-Z | 0 | - | 4.57 | 46,654 |
| Top European Languages on a Map | 0 | - | 4.77 | 132,253 |
| Embarrassing Chapters in Russian History | 0 | - | 3.70 | 20,322 |
| Russia Multiple Choice | 0 | - | 4.58 | 40,763 |
| Russian History A-Z | 0 | - | 4.35 | 31,816 |
| Countries Bordering Ukraine, with an Empty Map | 0 | - | 4.86 | 96,500 |
| Ancient Greece A-Z | 0 | - | 4.60 | 23,161 |
| Olympian Gods Quiz | 0 | - | 4.96 | 501,561 |
| Famous Irish People | 0 | - | 4.05 | 46,014 |
| History of Italy | 0 | - | 4.55 | 32,036 |
| Italy Multiple Choice | 0 | - | 4.74 | 103,903 |
| Geography of the Dutch Empire | 0 | - | 4.62 | 34,706 |
| Famous Nordic People | 0 | - | 4.34 | 20,156 |
| Famous Spaniards Quiz | 0 | - | 4.24 | 11,620 |
| Countries of the Spanish Empire | 0 | - | 4.52 | 77,284 |
| The British Royal Family - Modern Times | 0 | - | 4.16 | 21,539 |
| People on Money - England | 0 | - | 4.29 | 16,621 |
| London A-Z | 0 | - | 4.10 | 40,801 |
| Asian Cities A-Z by Clue | 0 | - | 4.50 | 41,215 |
| African Countries by First 2 Letters | 0 | - | 4.96 | 268,486 |
| Major non-NATO U.S. Allies | 0 | - | 4.52 | 52,261 |
| Europe Map Quiz | 0 | - | 5.00 | 4,768,348 |
| Europe Geography Quiz #1 | 0 | - | 4.55 | 71,329 |
| Europe Geography Quiz #2 | 0 | - | 4.57 | 71,993 |
| Europe Geography Quiz #4 | 0 | - | 4.57 | 70,276 |
| Europe Geography Quiz #5 | 0 | - | 4.55 | 61,277 |
| Four Letter European Geography #2 | 0 | - | 4.57 | 20,519 |
| Capitals of French Regions | 0 | - | 4.45 | 16,096 |
| Regions of France | 0 | - | 4.72 | 121,083 |
| France Immigration by Country | 0 | - | 4.70 | 76,632 |
| German Groups of Things | 0 | - | 4.46 | 38,501 |
| Capitals of German States | 0 | - | 4.74 | 28,979 |
| Chancellors of Germany, 1949–present | 0 | - | 4.60 | 23,379 |
| Germany True or False? | 0 | - | 4.61 | 48,860 |
| Largest Islands of Greece | 0 | - | 4.59 | 48,104 |
| Ancient Greek Words | 0 | - | 4.93 | 111,820 |
| Two Letter Roman Numerals | 0 | - | 4.97 | 56,230 |
| Provinces of the Netherlands | 0 | - | 4.80 | 41,462 |
| 100 Greatest Britons Quiz | 0 | - | 4.41 | 48,317 |
| Foods in a Full English Breakfast | 0 | - | 4.46 | 103,372 |
| The Thirteen Dwarves in the Hobbit | 0 | - | 4.81 | 28,695 |
| Name Every Beatles Song | 0 | - | 4.97 | 236,742 |
| Bohemian Rhapsody Lyrics | 0 | - | 4.98 | 291,949 |
| Famous Scottish People | 0 | - | 4.22 | 18,408 |
| Asian Geography By Letter - A | 0 | - | 4.64 | 71,201 |
| Asian Geography by Letter - H | 0 | - | 4.50 | 65,781 |
| Asian Geography By Letter - M | 0 | - | 4.47 | 61,466 |
| Asian Geography by Letter - P | 0 | - | 4.45 | 57,968 |
| Asian Geography by Letter - T | 0 | - | 4.51 | 57,416 |
| Asian Countries by First 2 Letters | 0 | - | 4.91 | 279,468 |
| Asian Geography By Letter - L | 0 | - | 4.49 | 43,097 |
| Asian Geography By Letter - O | 0 | - | 4.65 | 31,971 |
| Middle East A-Z | 0 | - | 4.47 | 46,113 |
| 100 Most Common English Words | 0 | - | 4.88 | 1,318,802 |
| Africa Map Quiz | 0 | - | 5.00 | 2,120,576 |
| Oceania Map Quiz | 0 | - | 4.98 | 643,394 |
| Australian Capitals | 0 | - | 4.92 | 62,739 |
| Canada A-Z | 0 | - | 4.73 | 32,873 |
| European Physical Geography | 0 | - | 4.26 | 33,532 |
| Czech Republic Country Quiz | 0 | - | 4.52 | 42,265 |
| Slovakia... or Slovenia? | 0 | - | 4.69 | 41,993 |
| Ukraine Country Quiz | 0 | - | 4.43 | 47,778 |
| Hungary Country Quiz | 0 | - | 4.49 | 43,512 |
| Romania Country Quiz | 0 | - | 4.63 | 53,867 |
| History of Austria | 0 | - | 4.70 | 17,890 |
| Geography of the French Empire | 0 | - | 4.45 | 27,145 |
| The French Revolution | 0 | - | 4.47 | 24,038 |
| France Multiple Choice | 0 | - | 4.39 | 40,757 |
| History of France | 0 | - | 4.59 | 57,207 |
| Figures from Greek Mythology | 0 | - | 4.91 | 187,338 |
| Roman Numeral Decoding Quiz | 0 | - | 4.94 | 437,682 |
| The Vikings! | 0 | - | 4.46 | 28,362 |
| Sweden Immigration by Country | 0 | - | 4.55 | 56,188 |
| The Portuguese Empire | 0 | - | 4.58 | 12,079 |
| American to British Word Translation | 0 | - | 4.14 | 139,236 |
| Languages of the United Kingdom | 0 | - | 4.13 | 40,931 |
| Champions League Top 4 | 0 | - | 4.77 | 137,055 |
| East Asia Map Quiz | 0 | - | 4.99 | 1,449,211 |
| Asia Map Quiz | 0 | - | 4.99 | 918,590 |
| A Quiz About Islam | 0 | - | 4.31 | 48,480 |
| Countries That Don't Recognize Israel | 0 | - | 4.68 | 34,912 |
| Most Common English Verbs - Extreme | 0 | - | 4.96 | 157,504 |
| Countries of Africa | 0 | - | 5.00 | 2,542,400 |
| Landlocked Countries in Africa | 0 | - | 4.99 | 47,015 |
| African East Coast | 0 | - | 4.96 | 96,197 |
| Western Africa Map Quiz | 0 | - | 4.97 | 74,063 |
| Oceanian Capitals - Map Quiz | 0 | - | 4.95 | 50,836 |
| Australia Map Quiz | 0 | - | 4.95 | 344,933 |
| U.S. Geography by Letter - B | 0 | - | 4.53 | 69,483 |
| U.S. Geography by Letter - S | 0 | - | 4.55 | 52,914 |
| U.S. Federal Holidays | 0 | - | 4.33 | 99,496 |
| United States Map Quiz | 0 | - | 4.98 | 4,162,182 |
| Two Letter U.S. State Abbreviations | 0 | - | 4.19 | 747,751 |
| Mediterranean Countries Quiz | 0 | - | 4.99 | 212,638 |
