| Federal Subjects of Russia | 0 | - | 4.94 | 143,626 |
| European Countries by First 2 Letters | 0 | - | 4.95 | 526,027 |
| Most Guessed Cities in Europe - Not Capitals | 0 | - | 4.82 | 86,784 |
| European Geography By Letter - P #1 | 0 | - | 4.81 | 96,269 |
| European Geography By Letter - B #2 | 0 | - | 4.83 | 76,128 |
| Category Elimination - European Geography #3 | 0 | - | 4.85 | 79,657 |
| Famous Russians | 0 | - | 4.16 | 23,708 |
| Countries That Border Russia | 0 | - | 4.98 | 458,567 |
| Russia Country Quiz | 0 | - | 4.85 | 113,565 |
| Famous Germans | 0 | - | 4.50 | 54,565 |
| Famous Italians by Clue | 0 | - | 4.45 | 88,257 |
| Count to 10 in Europe: Pro | 0 | - | 4.85 | 68,526 |
| Official European Union Languages | 0 | - | 4.97 | 236,363 |
| European Countries in their Native Language | 0 | - | 4.99 | 156,605 |
| Europe by Borders in 30 Seconds | 0 | - | 4.98 | 424,885 |
| Pre-Euro Currencies | 0 | - | 4.44 | 52,424 |
| Non-Bordering Countries Closest to Russia | 0 | - | 4.91 | 82,335 |
| Europe Geography Decoder | 0 | - | 4.86 | 69,487 |
| Countries that Beat Switzerland | 0 | - | 4.88 | 41,529 |
| History of Russia Quiz | 0 | - | 4.49 | 31,772 |
| Add A Letter - Make a European City | 0 | - | 4.90 | 23,226 |
| Celtic Nations | 0 | - | 4.69 | 46,797 |
| European Geography By Letter - A | 0 | - | 4.56 | 132,315 |
| European Geography By Letter - B #1 | 0 | - | 4.64 | 110,827 |
| European Geography By Letter - C | 0 | - | 4.46 | 111,766 |
| European Geography By Letter - D | 0 | - | 4.50 | 106,637 |
| European Geography By Letter - L | 0 | - | 4.52 | 112,164 |
| European Geography By Letter - M | 0 | - | 4.61 | 128,782 |
| European Geography By Letter - N | 0 | - | 4.44 | 99,623 |
| European Geography By Letter - R | 0 | - | 4.42 | 92,585 |
| European Geography By Letter - V | 0 | - | 4.43 | 91,989 |
| European Geography By Letter - T | 0 | - | 4.41 | 81,240 |
| European Geography By Letter - S #1 | 0 | - | 4.63 | 99,555 |
| Countries of Europe with an Empty Map | 0 | - | 5.00 | 307,583 |
| All First-Level Subdivisions of Europe on a Map | 0 | - | 4.98 | 167,563 |
| Most Mentioned Allies of Russia | 0 | - | 4.49 | 37,768 |
| Most Mentioned Enemies of Russia | 0 | - | 4.69 | 89,512 |
| Famous Dutch and Belgian People | 0 | - | 4.56 | 17,954 |
| Germany Multiple Choice | 0 | - | 4.84 | 54,014 |
| "Big Five" European Soccer Champions Since 2000 | 0 | - | 4.97 | 349,220 |
| U.S. Citizenship Test Questions | 0 | - | 4.83 | 238,177 |
| Catholic Countries in Europe | 0 | - | 4.83 | 94,116 |
| Famous French People | 0 | - | 4.12 | 27,876 |
| States of Germany | 0 | - | 4.96 | 149,809 |
| Germany Immigration by Country | 0 | - | 4.84 | 79,917 |
| Famous Irish People | 0 | - | 4.05 | 45,847 |
| Regions of Italy | 0 | - | 4.92 | 74,602 |
| Netherlands Immigration by Country | 0 | - | 4.94 | 43,740 |
| Famous Spaniards Quiz | 0 | - | 4.24 | 11,538 |
| Regions of Spain Quiz | 0 | - | 4.90 | 112,148 |
| Cantons of Switzerland | 0 | - | 4.98 | 50,061 |
| Champions League Winners | 0 | - | 4.92 | 995,163 |
| Asian Geography By Letter - B | 0 | - | 4.85 | 65,930 |
| Biggest Countries in Europe in 1700 | 0 | - | 4.73 | 58,099 |
| Geography of Russia | 0 | - | 4.57 | 21,418 |
| States of the German Confederation in 1848 | 0 | - | 4.89 | 31,484 |
| United Kingdom A-Z | 0 | - | 4.53 | 87,166 |
| 10 Closest Megacities to London | 0 | - | 4.90 | 17,393 |
| European Geography By Letter - E | 0 | - | 4.23 | 112,153 |
| European Geography By Letter - F | 0 | - | 4.17 | 91,395 |
| European Geography By Letter - H | 0 | - | 4.30 | 94,841 |
| European Geography By Letter - G | 0 | - | 4.25 | 101,212 |
| European Geography By Letter - I | 0 | - | 4.10 | 94,433 |
| European Geography By Letter - K | 0 | - | 4.14 | 69,110 |
| European Geography By Letter - O | 0 | - | 4.28 | 61,885 |
| European Geography by Letter - W | 0 | - | 4.20 | 82,267 |
| European Geography By Letter - S #2 | 0 | - | 4.19 | 50,474 |
| European Geography A-Z | 0 | - | 4.28 | 48,956 |
| Category Elimination - European Geography #1 | 0 | - | 4.98 | 230,242 |
| European Map without 10 Random Countries | 0 | - | 4.97 | 273,990 |
| Category Elimination - European Geography #2 | 0 | - | 4.99 | 164,922 |
| Croatia Country Quiz | 0 | - | 4.83 | 42,795 |
| Bosnia and Herzegovina Country Quiz | 0 | - | 4.86 | 35,000 |
| Departments of France | 0 | - | 4.93 | 52,681 |
| The Mafia Quiz | 0 | - | 4.46 | 23,194 |
| Countries Surrounding Rome | 0 | - | 4.97 | 49,342 |
| History of The Netherlands | 0 | - | 4.46 | 17,298 |
| Famous Scottish People | 0 | - | 4.22 | 18,318 |
| England or Wales? | 0 | - | 4.94 | 45,282 |
| All UEFA Champions League Teams Ever | 0 | - | 4.84 | 128,301 |
| Famous Australians by Description | 0 | - | 4.23 | 27,452 |
| European Countries with the Fewest Overnight Visitors | 0 | - | 4.78 | 41,596 |
| Word Scramble - European Countries | 0 | - | 4.74 | 140,912 |
| Top 20 Football Clubs in Europe | 0 | - | 4.48 | 112,828 |
| Name a Major European City A-Z | 0 | - | 4.33 | 49,069 |
| 100 Longest Rivers in Europe - with a Map | 0 | - | 4.94 | 64,751 |
| Slavic Languages | 0 | - | 4.67 | 53,933 |
| Countries that Border Poland | 0 | - | 4.99 | 171,222 |
| Russian History A-Z | 0 | - | 4.38 | 30,384 |
| Countries that Border Hungary | 0 | - | 4.98 | 103,613 |
| North Macedonia Country Quiz | 0 | - | 4.81 | 27,584 |
| Moldova Country Quiz | 0 | - | 4.81 | 30,518 |
| Countries Bordering Serbia | 0 | - | 4.96 | 91,655 |
| French Geography Quiz #1 | 0 | - | 4.89 | 34,491 |
| Famous Swiss and Austrian People | 0 | - | 4.45 | 14,549 |
| France A-Z | 0 | - | 4.16 | 38,042 |
| Letters of the Greek Alphabet | 0 | - | 4.97 | 641,236 |
| Name that Greek Letter | 0 | - | 4.94 | 321,444 |
| Capitals of Italian Regions | 0 | - | 4.62 | 36,419 |
| Spanish Immigration by Country | 0 | - | 4.63 | 55,227 |
| Switzerland A-Z | 0 | - | 4.45 | 25,493 |
| Africa A-Z | 0 | - | 4.57 | 46,345 |
| African Countries by First 2 Letters | 0 | - | 4.96 | 266,354 |
| Top European Languages on a Map | 0 | - | 4.77 | 131,008 |
| Word Chain - Russia | 0 | - | 4.33 | 15,681 |
| Russia Multiple Choice | 0 | - | 4.58 | 40,542 |
| Countries that Beat Russia | 0 | - | 4.84 | 81,784 |
| Countries Bordering Ukraine, with an Empty Map | 0 | - | 4.86 | 95,835 |
| Ancient Greece A-Z | 0 | - | 4.60 | 22,969 |
| The Trojan War | 0 | - | 4.83 | 39,398 |
| Greek Mythology General Knowledge #1 | 0 | - | 4.85 | 110,362 |
| History of Italy | 0 | - | 4.55 | 31,800 |
| Italy Multiple Choice | 0 | - | 4.74 | 103,099 |
| Ancient Roman Trivia #1 | 0 | - | 4.85 | 83,981 |
| Roman Emperors | 0 | - | 4.95 | 118,301 |
| Geography of the Dutch Empire | 0 | - | 4.62 | 34,464 |
| Famous Nordic People | 0 | - | 4.34 | 19,823 |
| Countries of the Spanish Empire | 0 | - | 4.52 | 76,962 |
| The British Royal Family - Modern Times | 0 | - | 4.16 | 21,454 |
| People on Money - England | 0 | - | 4.29 | 16,558 |
| English Monarchs in Order by First Letter | 0 | - | 4.38 | 31,290 |
| London A-Z | 0 | - | 4.10 | 40,623 |
| Asian Cities A-Z by Clue | 0 | - | 4.53 | 33,405 |
| Asian Countries by First 2 Letters | 0 | - | 4.91 | 276,937 |
| Famous Chinese People | 0 | - | 4.09 | 11,794 |
| Major non-NATO U.S. Allies | 0 | - | 4.52 | 51,687 |
| Europe Map Quiz | 0 | - | 5.00 | 4,727,722 |
| Europe Geography Quiz #1 | 0 | - | 4.54 | 70,963 |
| Europe Geography Quiz #2 | 0 | - | 4.57 | 71,584 |
| Europe Geography Quiz #4 | 0 | - | 4.57 | 69,911 |
| Europe Geography Quiz #5 | 0 | - | 4.54 | 60,952 |
| Capitals of French Regions | 0 | - | 4.45 | 15,979 |
| Regions of France | 0 | - | 4.78 | 119,045 |
| France Immigration by Country | 0 | - | 4.72 | 75,919 |
| German Groups of Things | 0 | - | 4.46 | 38,290 |
| Capitals of German States | 0 | - | 4.74 | 28,797 |
| Chancellors of Germany, 1949–present | 0 | - | 4.60 | 23,078 |
| Germany True or False? | 0 | - | 4.61 | 48,506 |
| Largest Islands of Greece | 0 | - | 4.59 | 47,390 |
| Olympian Gods Quiz | 0 | - | 4.96 | 494,867 |
| Ancient Greek Words | 0 | - | 4.92 | 110,553 |
| Provinces of the Netherlands | 0 | - | 4.80 | 40,731 |
| 100 Greatest Britons Quiz | 0 | - | 4.41 | 48,026 |
| Foods in a Full English Breakfast | 0 | - | 4.46 | 101,862 |
| Name Every Beatles Song | 0 | - | 4.97 | 233,834 |
| Bohemian Rhapsody Lyrics | 0 | - | 4.98 | 290,202 |
| Asian Geography By Letter - A | 0 | - | 4.64 | 70,775 |
| Asian Geography by Letter - H | 0 | - | 4.49 | 65,349 |
| Asian Geography By Letter - M | 0 | - | 4.47 | 61,113 |
| Asian Geography by Letter - P | 0 | - | 4.45 | 57,522 |
| Asian Geography by Letter - T | 0 | - | 4.50 | 57,024 |
| Asian Geography By Letter - L | 0 | - | 4.49 | 42,659 |
| Middle East A-Z | 0 | - | 4.46 | 45,747 |
| 100 Most Common English Words | 0 | - | 4.88 | 1,303,534 |
| Africa Map Quiz | 0 | - | 5.00 | 2,102,888 |
| Oceania Map Quiz | 0 | - | 4.98 | 634,497 |
| Australian Capitals | 0 | - | 4.92 | 62,586 |
| Canada A-Z | 0 | - | 4.73 | 32,627 |
| European Physical Geography | 0 | - | 4.26 | 33,365 |
| Albania Country Quiz | 0 | - | 4.54 | 38,609 |
| Czech Republic Country Quiz | 0 | - | 4.52 | 41,817 |
| Slovakia... or Slovenia? | 0 | - | 4.69 | 41,754 |
| Ukraine Country Quiz | 0 | - | 4.42 | 47,264 |
| Hungary Country Quiz | 0 | - | 4.49 | 42,981 |
| Romania Country Quiz | 0 | - | 4.63 | 53,302 |
| Serbia Country Quiz | 0 | - | 4.44 | 34,741 |
| History of Austria | 0 | - | 4.70 | 17,736 |
| Geography of the French Empire | 0 | - | 4.48 | 26,912 |
| The French Revolution | 0 | - | 4.46 | 23,750 |
| France Multiple Choice | 0 | - | 4.38 | 40,619 |
| History of France | 0 | - | 4.59 | 55,896 |
| Biggest Cities in Germany in 1910 | 0 | - | 4.41 | 23,372 |
| Roman Numeral Decoding Quiz | 0 | - | 4.94 | 433,135 |
| Two Letter Roman Numerals | 0 | - | 4.97 | 55,552 |
| The Vikings! | 0 | - | 4.45 | 28,235 |
| Sweden Immigration by Country | 0 | - | 4.55 | 55,659 |
| The Portuguese Empire | 0 | - | 4.54 | 11,980 |
| American to British Word Translation | 0 | - | 4.06 | 117,011 |
| Languages of the United Kingdom | 0 | - | 4.13 | 40,686 |
| The Thirteen Dwarves in the Hobbit | 0 | - | 4.81 | 28,380 |
| Champions League Top 4 | 0 | - | 4.77 | 133,530 |
| East Asia Map Quiz | 0 | - | 4.99 | 1,438,044 |
| Asia Map Quiz | 0 | - | 4.99 | 905,927 |
| A Quiz About Islam | 0 | - | 4.31 | 48,180 |
| Countries That Don't Recognize Israel | 0 | - | 4.63 | 34,400 |
| Most Common English Verbs - Extreme | 0 | - | 4.96 | 155,652 |
| Countries of Africa | 0 | - | 5.00 | 2,504,700 |
| Landlocked Countries in Africa | 0 | - | 4.99 | 45,725 |
| African East Coast | 0 | - | 4.96 | 94,938 |
| Western Africa Map Quiz | 0 | - | 4.97 | 72,802 |
| Oceanian Capitals - Map Quiz | 0 | - | 4.95 | 49,724 |
| Australia Map Quiz | 0 | - | 4.94 | 342,250 |
| U.S. Geography by Letter - B | 0 | - | 4.53 | 68,501 |
| U.S. Geography by Letter - S | 0 | - | 4.54 | 52,054 |
| U.S. Federal Holidays | 0 | - | 4.33 | 99,073 |
| United States Map Quiz | 0 | - | 4.98 | 4,139,810 |
| Two Letter U.S. State Abbreviations | 0 | - | 4.19 | 742,800 |
| Mediterranean Countries Quiz | 0 | - | 4.99 | 209,851 |
| Countries with Territorial Claims in Antarctica | 0 | - | 4.94 | 92,157 |
| Countries That Use the Euro | 0 | - | 4.96 | 102,750 |
