| Federal Subjects of Russia | 0 | - | 4.95 | 148,072 |
| European Countries by First 2 Letters | 0 | - | 4.95 | 530,715 |
| Most Guessed Cities in Europe - Not Capitals | 0 | - | 4.82 | 87,548 |
| European Geography By Letter - P #1 | 0 | - | 4.81 | 97,969 |
| European Geography By Letter - B #2 | 0 | - | 4.86 | 87,008 |
| Category Elimination - European Geography #3 | 0 | - | 4.86 | 81,345 |
| History of Russia Quiz | 0 | - | 4.47 | 31,957 |
| Count to 10 in Europe: Pro | 0 | - | 4.86 | 69,344 |
| Official European Union Languages | 0 | - | 4.97 | 238,968 |
| European Countries in their Native Language | 0 | - | 4.99 | 158,157 |
| Europe by Borders in 30 Seconds | 0 | - | 4.98 | 429,148 |
| Geography of Russia | 0 | - | 4.57 | 21,556 |
| Pre-Euro Currencies | 0 | - | 4.44 | 52,652 |
| Famous Russians | 0 | - | 4.16 | 23,871 |
| Non-Bordering Countries Closest to Russia | 0 | - | 4.91 | 82,998 |
| Europe Geography Decoder | 0 | - | 4.86 | 70,121 |
| Countries that Beat Switzerland | 0 | - | 4.88 | 41,920 |
| Add A Letter - Make a European City | 0 | - | 4.90 | 23,434 |
| Celtic Nations | 0 | - | 4.69 | 47,001 |
| European Geography By Letter - A | 0 | - | 4.52 | 147,012 |
| European Geography By Letter - B #1 | 0 | - | 4.67 | 120,403 |
| European Geography By Letter - C | 0 | - | 4.46 | 114,807 |
| European Geography By Letter - D | 0 | - | 4.50 | 109,354 |
| European Geography By Letter - L | 0 | - | 4.52 | 114,027 |
| European Geography By Letter - M | 0 | - | 4.67 | 131,352 |
| European Geography By Letter - N | 0 | - | 4.44 | 101,223 |
| European Geography By Letter - R | 0 | - | 4.42 | 94,032 |
| European Geography By Letter - V | 0 | - | 4.42 | 93,302 |
| European Geography By Letter - T | 0 | - | 4.41 | 82,862 |
| European Geography By Letter - S #1 | 0 | - | 4.63 | 100,906 |
| Countries of Europe with an Empty Map | 0 | - | 5.00 | 311,424 |
| All First-Level Subdivisions of Europe on a Map | 0 | - | 4.98 | 173,305 |
| Countries with Territory in the Balkans | 0 | - | 4.96 | 89,596 |
| Eastern Europe Map Quiz | 0 | - | 4.91 | 128,438 |
| Slavic Countries | 0 | - | 4.96 | 111,909 |
| Most Mentioned Allies of Russia | 0 | - | 4.49 | 38,080 |
| Most Mentioned Enemies of Russia | 0 | - | 4.69 | 90,138 |
| Famous Germans | 0 | - | 4.50 | 55,541 |
| Germany Multiple Choice | 0 | - | 4.84 | 54,486 |
| States of the German Confederation in 1848 | 0 | - | 4.90 | 32,211 |
| Famous Italians by Clue | 0 | - | 4.45 | 89,833 |
| "Big Five" European Soccer Champions Since 2000 | 0 | - | 4.97 | 358,323 |
| U.S. Citizenship Test Questions | 0 | - | 4.83 | 239,768 |
| Catholic Countries in Europe | 0 | - | 4.83 | 95,410 |
| Word Chain - Russia | 0 | - | 4.33 | 15,772 |
| Countries Formerly in Yugoslavia | 0 | - | 4.95 | 125,124 |
| States of Germany | 0 | - | 4.95 | 153,273 |
| Germany Immigration by Country | 0 | - | 4.85 | 81,303 |
| Regions of Italy | 0 | - | 4.92 | 76,300 |
| Netherlands Immigration by Country | 0 | - | 4.93 | 52,452 |
| Regions of Spain Quiz | 0 | - | 4.90 | 114,457 |
| Cantons of Switzerland | 0 | - | 4.98 | 51,428 |
| Champions League Winners | 0 | - | 4.92 | 1,010,130 |
| Asian Geography By Letter - B | 0 | - | 4.85 | 66,735 |
| Biggest Countries in Europe in 1700 | 0 | - | 4.73 | 58,591 |
| Countries That Border Russia | 0 | - | 4.98 | 462,893 |
| United Kingdom A-Z | 0 | - | 4.52 | 88,170 |
| 10 Closest Megacities to London | 0 | - | 4.90 | 17,758 |
| European Geography By Letter - E | 0 | - | 4.23 | 114,285 |
| European Geography By Letter - F | 0 | - | 4.17 | 93,631 |
| European Geography By Letter - H | 0 | - | 4.30 | 96,482 |
| European Geography By Letter - G | 0 | - | 4.27 | 103,169 |
| European Geography By Letter - I | 0 | - | 4.09 | 95,911 |
| European Geography By Letter - K | 0 | - | 4.14 | 70,550 |
| European Geography By Letter - O | 0 | - | 4.29 | 63,029 |
| European Geography by Letter - W | 0 | - | 4.21 | 83,160 |
| European Geography By Letter - S #2 | 0 | - | 4.20 | 51,459 |
| European Geography A-Z | 0 | - | 4.29 | 49,370 |
| Category Elimination - European Geography #1 | 0 | - | 4.98 | 233,977 |
| European Map without 10 Random Countries | 0 | - | 4.97 | 277,424 |
| Category Elimination - European Geography #2 | 0 | - | 4.99 | 167,690 |
| Russia Country Quiz | 0 | - | 4.83 | 114,718 |
| Croatia Country Quiz | 0 | - | 4.83 | 43,497 |
| Bosnia and Herzegovina Country Quiz | 0 | - | 4.86 | 35,422 |
| Famous French People | 0 | - | 4.07 | 35,872 |
| Departments of France | 0 | - | 4.93 | 54,505 |
| Countries Surrounding Rome | 0 | - | 4.97 | 49,620 |
| History of The Netherlands | 0 | - | 4.46 | 17,489 |
| English Monarchs in Order by First Letter | 0 | - | 4.38 | 31,964 |
| England or Wales? | 0 | - | 4.94 | 45,808 |
| All UEFA Champions League Teams Ever | 0 | - | 4.85 | 131,059 |
| European Countries with the Fewest Overnight Visitors | 0 | - | 4.80 | 41,676 |
| Word Scramble - European Countries | 0 | - | 4.73 | 141,895 |
| Top 20 Football Clubs in Europe | 0 | - | 4.48 | 115,676 |
| Name a Major European City A-Z | 0 | - | 4.33 | 49,664 |
| 100 Longest Rivers in Europe - with a Map | 0 | - | 4.94 | 65,656 |
| Slavic Languages | 0 | - | 4.68 | 54,475 |
| Countries that Border Hungary | 0 | - | 4.98 | 104,447 |
| North Macedonia Country Quiz | 0 | - | 4.81 | 27,931 |
| Moldova Country Quiz | 0 | - | 4.82 | 30,891 |
| French Geography Quiz #1 | 0 | - | 4.89 | 34,864 |
| Famous Swiss and Austrian People | 0 | - | 4.45 | 14,646 |
| Famous Dutch and Belgian People | 0 | - | 4.56 | 18,091 |
| France A-Z | 0 | - | 4.16 | 38,272 |
| Letters of the Greek Alphabet | 0 | - | 4.97 | 649,039 |
| Name that Greek Letter | 0 | - | 4.93 | 324,211 |
| Capitals of Italian Regions | 0 | - | 4.62 | 36,666 |
| Spanish Immigration by Country | 0 | - | 4.63 | 55,517 |
| Switzerland A-Z | 0 | - | 4.45 | 25,693 |
| Top European Languages on a Map | 0 | - | 4.77 | 132,374 |
| Embarrassing Chapters in Russian History | 0 | - | 3.70 | 20,325 |
| Russia Multiple Choice | 0 | - | 4.58 | 40,783 |
| Russian History A-Z | 0 | - | 4.35 | 31,881 |
| Countries Bordering Ukraine, with an Empty Map | 0 | - | 4.86 | 96,553 |
| Ancient Greece A-Z | 0 | - | 4.60 | 23,181 |
| The Trojan War | 0 | - | 4.83 | 39,807 |
| Greek Mythology General Knowledge #1 | 0 | - | 4.85 | 112,278 |
| Famous Irish People | 0 | - | 4.05 | 46,024 |
| History of Italy | 0 | - | 4.55 | 32,060 |
| Italy Multiple Choice | 0 | - | 4.74 | 103,982 |
| Ancient Roman Trivia #1 | 0 | - | 4.85 | 84,661 |
| Roman Emperors | 0 | - | 4.95 | 120,427 |
| Geography of the Dutch Empire | 0 | - | 4.61 | 34,723 |
| Famous Nordic People | 0 | - | 4.34 | 20,177 |
| Famous Spaniards Quiz | 0 | - | 4.24 | 11,624 |
| Countries of the Spanish Empire | 0 | - | 4.52 | 77,301 |
| The British Royal Family - Modern Times | 0 | - | 4.16 | 21,546 |
| People on Money - England | 0 | - | 4.29 | 16,625 |
| London A-Z | 0 | - | 4.10 | 40,819 |
| Zone 1 London Underground Stations - With a Map | 0 | - | 4.90 | 52,508 |
| Asian Cities A-Z by Clue | 0 | - | 4.51 | 42,427 |
| Asian Countries by First 2 Letters | 0 | - | 4.91 | 279,740 |
| Africa A-Z | 0 | - | 4.57 | 46,686 |
| African Countries by First 2 Letters | 0 | - | 4.96 | 268,633 |
| Major non-NATO U.S. Allies | 0 | - | 4.52 | 52,297 |
| Europe Map Quiz | 0 | - | 5.00 | 4,772,190 |
| Europe Geography Quiz #1 | 0 | - | 4.55 | 71,361 |
| Europe Geography Quiz #2 | 0 | - | 4.57 | 72,020 |
| Europe Geography Quiz #4 | 0 | - | 4.57 | 70,311 |
| Europe Geography Quiz #5 | 0 | - | 4.55 | 61,304 |
| Capitals of French Regions | 0 | - | 4.45 | 16,117 |
| Regions of France | 0 | - | 4.72 | 121,281 |
| France Immigration by Country | 0 | - | 4.70 | 76,694 |
| German Groups of Things | 0 | - | 4.46 | 38,529 |
| Capitals of German States | 0 | - | 4.74 | 28,990 |
| Chancellors of Germany, 1949–present | 0 | - | 4.60 | 23,404 |
| Germany True or False? | 0 | - | 4.61 | 48,895 |
| Largest Islands of Greece | 0 | - | 4.59 | 48,154 |
| Olympian Gods Quiz | 0 | - | 4.96 | 501,990 |
| Ancient Greek Words | 0 | - | 4.93 | 111,934 |
| Provinces of the Netherlands | 0 | - | 4.80 | 41,510 |
| 100 Greatest Britons Quiz | 0 | - | 4.41 | 48,346 |
| Foods in a Full English Breakfast | 0 | - | 4.46 | 103,464 |
| Name Every Beatles Song | 0 | - | 4.97 | 237,118 |
| Bohemian Rhapsody Lyrics | 0 | - | 4.98 | 292,132 |
| Famous Scottish People | 0 | - | 4.22 | 18,415 |
| Asian Geography By Letter - A | 0 | - | 4.64 | 71,276 |
| Asian Geography by Letter - H | 0 | - | 4.50 | 65,848 |
| Asian Geography By Letter - M | 0 | - | 4.48 | 61,509 |
| Asian Geography by Letter - P | 0 | - | 4.45 | 58,017 |
| Asian Geography by Letter - T | 0 | - | 4.51 | 57,479 |
| Asian Geography By Letter - L | 0 | - | 4.49 | 43,140 |
| Asian Geography By Letter - O | 0 | - | 4.66 | 32,046 |
| Middle East A-Z | 0 | - | 4.47 | 46,154 |
| 100 Most Common English Words | 0 | - | 4.88 | 1,320,093 |
| Oceania Map Quiz | 0 | - | 4.98 | 654,073 |
| Australian Capitals | 0 | - | 4.92 | 62,759 |
| Canada A-Z | 0 | - | 4.73 | 32,893 |
| European Physical Geography | 0 | - | 4.26 | 33,542 |
| Czech Republic Country Quiz | 0 | - | 4.52 | 42,299 |
| Slovakia... or Slovenia? | 0 | - | 4.69 | 42,023 |
| Ukraine Country Quiz | 0 | - | 4.43 | 47,805 |
| Hungary Country Quiz | 0 | - | 4.49 | 43,560 |
| Romania Country Quiz | 0 | - | 4.63 | 53,921 |
| History of Austria | 0 | - | 4.70 | 17,911 |
| Geography of the French Empire | 0 | - | 4.45 | 27,157 |
| The French Revolution | 0 | - | 4.47 | 24,066 |
| France Multiple Choice | 0 | - | 4.39 | 40,774 |
| History of France | 0 | - | 4.59 | 57,292 |
| Roman Numeral Decoding Quiz | 0 | - | 4.94 | 438,128 |
| Two Letter Roman Numerals | 0 | - | 4.97 | 56,285 |
| The Vikings! | 0 | - | 4.46 | 28,370 |
| Sweden Immigration by Country | 0 | - | 4.55 | 56,219 |
| The Portuguese Empire | 0 | - | 4.58 | 12,086 |
| American to British Word Translation | 0 | - | 4.14 | 139,338 |
| Languages of the United Kingdom | 0 | - | 4.13 | 40,954 |
| The Thirteen Dwarves in the Hobbit | 0 | - | 4.81 | 28,727 |
| Champions League Top 4 | 0 | - | 4.77 | 137,364 |
| East Asia Map Quiz | 0 | - | 4.99 | 1,449,818 |
| Asia Map Quiz | 0 | - | 4.99 | 919,942 |
| A Quiz About Islam | 0 | - | 4.31 | 48,508 |
| Countries That Don't Recognize Israel | 0 | - | 4.68 | 34,960 |
| Africa Map Quiz | 0 | - | 5.00 | 2,122,151 |
| Most Common English Verbs - Extreme | 0 | - | 4.96 | 157,674 |
| Oceanian Capitals - Map Quiz | 0 | - | 4.95 | 50,964 |
| Australia Map Quiz | 0 | - | 4.95 | 345,242 |
| U.S. Geography by Letter - B | 0 | - | 4.53 | 69,684 |
| U.S. Geography by Letter - S | 0 | - | 4.55 | 53,120 |
| U.S. Federal Holidays | 0 | - | 4.33 | 99,527 |
| United States Map Quiz | 0 | - | 4.98 | 4,163,893 |
| Two Letter U.S. State Abbreviations | 0 | - | 4.19 | 748,115 |
| Mediterranean Countries Quiz | 0 | - | 4.99 | 212,861 |
| Countries with Territorial Claims in Antarctica | 0 | - | 4.94 | 92,746 |
| Countries That Use the Euro | 0 | - | 4.95 | 105,633 |
| Europe Cities Map Quiz | 0 | - | 4.99 | 365,110 |
| Europe Geography Quiz #3 | 0 | - | 4.35 | 63,753 |
| 10 Easternmost Countries in Europe | 0 | - | 4.89 | 115,735 |
| Country Codes of Europe | 0 | - | 3.43 | 13,757 |
| The Only European Country ... | 0 | - | 4.91 | 217,473 |
| European Countries NOT in NATO | 0 | - | 4.90 | 61,626 |
