| Federal Subjects of Russia | 0 | - | 4.95 | 149,888 |
| Most Guessed Cities in Europe - Not Capitals | 0 | - | 4.83 | 88,122 |
| European Countries by First 2 Letters | 0 | - | 4.95 | 532,980 |
| European Geography By Letter - P #1 | 0 | - | 4.81 | 99,083 |
| European Geography By Letter - B #2 | 0 | - | 4.86 | 89,054 |
| Category Elimination - European Geography #3 | 0 | - | 4.86 | 82,149 |
| History of Russia Quiz | 0 | - | 4.47 | 32,023 |
| Save Europeans by Guessing Countries | 0 | - | 4.86 | 217,357 |
| Count to 10 in Europe: Pro | 0 | - | 4.86 | 69,843 |
| Official European Union Languages | 0 | - | 4.97 | 240,320 |
| European Countries in their Native Language | 0 | - | 4.99 | 158,793 |
| Europe by Borders in 30 Seconds | 0 | - | 4.98 | 431,346 |
| Geography of Russia | 0 | - | 4.57 | 21,616 |
| Non-Bordering Countries Closest to Russia | 0 | - | 4.91 | 83,342 |
| Pre-Euro Currencies | 0 | - | 4.44 | 52,774 |
| Famous Russians | 0 | - | 4.16 | 23,924 |
| Europe Geography Decoder | 0 | - | 4.87 | 70,373 |
| Countries that Beat Switzerland | 0 | - | 4.88 | 42,096 |
| Countries of Europe with an Empty Map | 0 | - | 5.00 | 313,112 |
| All First-Level Subdivisions of Europe on a Map | 0 | - | 4.99 | 176,429 |
| Countries with Territory in the Balkans | 0 | - | 4.96 | 90,344 |
| Eastern Europe Map Quiz | 0 | - | 4.91 | 128,900 |
| Slavic Countries | 0 | - | 4.96 | 112,488 |
| Germany Multiple Choice | 0 | - | 4.84 | 54,742 |
| States of the German Confederation in 1848 | 0 | - | 4.90 | 32,507 |
| "Big Five" European Soccer Champions Since 2000 | 0 | - | 4.97 | 362,508 |
| Celtic Nations | 0 | - | 4.61 | 47,125 |
| European Geography By Letter - A | 0 | - | 4.52 | 148,337 |
| European Geography By Letter - B #1 | 0 | - | 4.62 | 121,735 |
| European Geography By Letter - C | 0 | - | 4.44 | 124,242 |
| European Geography By Letter - D | 0 | - | 4.49 | 118,688 |
| European Geography By Letter - L | 0 | - | 4.52 | 115,261 |
| European Geography By Letter - M | 0 | - | 4.69 | 132,772 |
| European Geography By Letter - N | 0 | - | 4.44 | 102,276 |
| European Geography By Letter - R | 0 | - | 4.43 | 94,883 |
| European Geography By Letter - V | 0 | - | 4.43 | 94,164 |
| European Geography By Letter - T | 0 | - | 4.41 | 83,777 |
| European Geography By Letter - S #1 | 0 | - | 4.63 | 101,559 |
| Most Mentioned Allies of Russia | 0 | - | 4.49 | 38,220 |
| Most Mentioned Enemies of Russia | 0 | - | 4.69 | 90,401 |
| Famous Germans | 0 | - | 4.50 | 55,859 |
| Famous Italians by Clue | 0 | - | 4.45 | 90,525 |
| Champions League Winners | 0 | - | 4.92 | 1,017,709 |
| Add A Letter - Make a European City | 0 | - | 4.88 | 23,534 |
| U.S. Citizenship Test Questions | 0 | - | 4.83 | 240,956 |
| Catholic Countries in Europe | 0 | - | 4.83 | 95,885 |
| Word Chain - Russia | 0 | - | 4.33 | 15,804 |
| Countries That Border Russia | 0 | - | 4.98 | 464,867 |
| Countries Formerly in Yugoslavia | 0 | - | 4.95 | 125,568 |
| States of Germany | 0 | - | 4.95 | 154,892 |
| Germany Immigration by Country | 0 | - | 4.86 | 81,791 |
| Regions of Italy | 0 | - | 4.92 | 77,243 |
| Netherlands Immigration by Country | 0 | - | 4.93 | 52,899 |
| Regions of Spain Quiz | 0 | - | 4.90 | 115,552 |
| Cantons of Switzerland | 0 | - | 4.98 | 51,885 |
| United Kingdom A-Z | 0 | - | 4.51 | 88,426 |
| 10 Closest Megacities to London | 0 | - | 4.90 | 17,860 |
| Asian Geography By Letter - B | 0 | - | 4.85 | 67,103 |
| European Geography By Letter - E | 0 | - | 4.23 | 115,390 |
| European Geography By Letter - F | 0 | - | 4.15 | 94,638 |
| European Geography By Letter - H | 0 | - | 4.30 | 97,336 |
| European Geography By Letter - G | 0 | - | 4.27 | 104,110 |
| European Geography By Letter - I | 0 | - | 4.07 | 96,691 |
| European Geography By Letter - K | 0 | - | 4.15 | 71,335 |
| European Geography By Letter - O | 0 | - | 4.29 | 63,719 |
| European Geography by Letter - W | 0 | - | 4.21 | 83,688 |
| European Geography By Letter - S #2 | 0 | - | 4.20 | 51,990 |
| European Geography A-Z | 0 | - | 4.29 | 49,514 |
| Biggest Countries in Europe in 1700 | 0 | - | 4.73 | 58,809 |
| Category Elimination - European Geography #1 | 0 | - | 4.98 | 236,271 |
| European Map without 10 Random Countries | 0 | - | 4.97 | 279,264 |
| Category Elimination - European Geography #2 | 0 | - | 4.99 | 169,212 |
| Russia Country Quiz | 0 | - | 4.83 | 115,424 |
| Croatia Country Quiz | 0 | - | 4.83 | 43,822 |
| Bosnia and Herzegovina Country Quiz | 0 | - | 4.83 | 35,628 |
| Famous French People | 0 | - | 4.05 | 36,152 |
| Departments of France | 0 | - | 4.93 | 55,373 |
| The Mafia Quiz | 0 | - | 4.46 | 23,450 |
| Countries Surrounding Rome | 0 | - | 4.97 | 49,774 |
| History of The Netherlands | 0 | - | 4.46 | 17,571 |
| English Monarchs in Order by First Letter | 0 | - | 4.38 | 32,202 |
| England or Wales? | 0 | - | 4.94 | 46,012 |
| All UEFA Champions League Teams Ever | 0 | - | 4.85 | 132,422 |
| European Countries with the Fewest Overnight Visitors | 0 | - | 4.80 | 41,740 |
| Word Scramble - European Countries | 0 | - | 4.73 | 142,431 |
| Top 20 Football Clubs in Europe | 0 | - | 4.48 | 123,800 |
| Name a Major European City A-Z | 0 | - | 4.33 | 49,905 |
| 100 Longest Rivers in Europe - with a Map | 0 | - | 4.94 | 66,038 |
| Slavic Languages | 0 | - | 4.67 | 54,773 |
| Countries that Border Hungary | 0 | - | 4.98 | 105,086 |
| North Macedonia Country Quiz | 0 | - | 4.81 | 28,084 |
| Moldova Country Quiz | 0 | - | 4.82 | 31,056 |
| French Geography Quiz #1 | 0 | - | 4.89 | 35,215 |
| Famous Swiss and Austrian People | 0 | - | 4.45 | 14,678 |
| Famous Dutch and Belgian People | 0 | - | 4.56 | 18,158 |
| France A-Z | 0 | - | 4.16 | 38,359 |
| Country Quiz on a Map - France | 0 | - | 4.98 | 47,786 |
| Country Quiz on a Map - Germany | 0 | - | 4.95 | 35,642 |
| The Trojan War | 0 | - | 4.83 | 40,042 |
| Letters of the Greek Alphabet | 0 | - | 4.97 | 652,788 |
| Name that Greek Letter | 0 | - | 4.93 | 325,213 |
| Greek Mythology General Knowledge #1 | 0 | - | 4.85 | 113,143 |
| Capitals of Italian Regions | 0 | - | 4.62 | 36,756 |
| Ancient Roman Trivia #1 | 0 | - | 4.85 | 85,676 |
| Roman Emperors | 0 | - | 4.95 | 121,397 |
| Spanish Immigration by Country | 0 | - | 4.63 | 55,665 |
| Switzerland A-Z | 0 | - | 4.45 | 25,786 |
| Top European Languages on a Map | 0 | - | 4.77 | 132,994 |
| Embarrassing Chapters in Russian History | 0 | - | 3.70 | 20,371 |
| Russia Multiple Choice | 0 | - | 4.58 | 40,898 |
| Russian History A-Z | 0 | - | 4.35 | 32,291 |
| Countries Bordering Ukraine, with an Empty Map | 0 | - | 4.86 | 96,897 |
| Ancient Greece A-Z | 0 | - | 4.60 | 23,257 |
| Olympian Gods Quiz | 0 | - | 4.96 | 504,320 |
| Famous Irish People | 0 | - | 4.05 | 46,076 |
| History of Italy | 0 | - | 4.55 | 32,180 |
| Italy Multiple Choice | 0 | - | 4.74 | 104,506 |
| Geography of the Dutch Empire | 0 | - | 4.62 | 34,844 |
| Famous Nordic People | 0 | - | 4.34 | 20,332 |
| Famous Spaniards Quiz | 0 | - | 4.24 | 11,648 |
| Countries of the Spanish Empire | 0 | - | 4.52 | 77,465 |
| The British Royal Family - Modern Times | 0 | - | 4.16 | 21,584 |
| People on Money - England | 0 | - | 4.29 | 16,650 |
| London A-Z | 0 | - | 4.10 | 40,898 |
| Asian Cities A-Z by Clue | 0 | - | 4.52 | 43,075 |
| Africa A-Z | 0 | - | 4.57 | 46,795 |
| Major non-NATO U.S. Allies | 0 | - | 4.52 | 52,589 |
| Europe Map Quiz | 0 | - | 5.00 | 4,792,604 |
| Europe Geography Quiz #1 | 0 | - | 4.55 | 71,560 |
| Europe Geography Quiz #2 | 0 | - | 4.57 | 72,234 |
| Europe Geography Quiz #4 | 0 | - | 4.57 | 70,503 |
| Europe Geography Quiz #5 | 0 | - | 4.55 | 61,460 |
| Four Letter European Geography #1 | 0 | - | 4.41 | 28,606 |
| Four Letter European Geography #2 | 0 | - | 4.54 | 20,784 |
| Capitals of French Regions | 0 | - | 4.45 | 16,195 |
| Regions of France | 0 | - | 4.70 | 122,363 |
| France Immigration by Country | 0 | - | 4.70 | 77,002 |
| German Groups of Things | 0 | - | 4.47 | 38,664 |
| Capitals of German States | 0 | - | 4.74 | 29,093 |
| Chancellors of Germany, 1949–present | 0 | - | 4.60 | 23,579 |
| Germany True or False? | 0 | - | 4.61 | 49,060 |
| Largest Islands of Greece | 0 | - | 4.59 | 48,565 |
| Ancient Greek Words | 0 | - | 4.93 | 112,629 |
| Two Letter Roman Numerals | 0 | - | 4.97 | 56,599 |
| Provinces of the Netherlands | 0 | - | 4.80 | 41,927 |
| 100 Greatest Britons Quiz | 0 | - | 4.41 | 48,430 |
| Foods in a Full English Breakfast | 0 | - | 4.46 | 103,937 |
| Things British People Know that Americans Don't | 0 | - | 4.25 | 51,595 |
| The Thirteen Dwarves in the Hobbit | 0 | - | 4.81 | 28,844 |
| Name Every Beatles Song | 0 | - | 4.97 | 238,656 |
| Bohemian Rhapsody Lyrics | 0 | - | 4.98 | 292,965 |
| Famous Scottish People | 0 | - | 4.22 | 18,442 |
| Asian Geography By Letter - A | 0 | - | 4.64 | 71,520 |
| Asian Geography by Letter - H | 0 | - | 4.50 | 66,135 |
| Asian Geography By Letter - M | 0 | - | 4.48 | 61,711 |
| Asian Geography by Letter - P | 0 | - | 4.45 | 58,269 |
| Asian Geography by Letter - T | 0 | - | 4.52 | 57,708 |
| Asian Countries by First 2 Letters | 0 | - | 4.91 | 280,954 |
| Asian Geography By Letter - L | 0 | - | 4.49 | 43,377 |
| Asian Geography By Letter - O | 0 | - | 4.66 | 32,377 |
| Middle East A-Z | 0 | - | 4.47 | 46,270 |
| African Countries by First 2 Letters | 0 | - | 4.96 | 269,623 |
| 100 Most Common English Words | 0 | - | 4.88 | 1,327,400 |
| Oceania Map Quiz | 0 | - | 4.98 | 660,196 |
| Australian Capitals | 0 | - | 4.92 | 62,861 |
| Canada A-Z | 0 | - | 4.73 | 32,990 |
| European Physical Geography | 0 | - | 4.26 | 33,615 |
| Czech Republic Country Quiz | 0 | - | 4.52 | 42,501 |
| Slovakia... or Slovenia? | 0 | - | 4.69 | 42,157 |
| Ukraine Country Quiz | 0 | - | 4.43 | 48,041 |
| Hungary Country Quiz | 0 | - | 4.49 | 43,828 |
| Romania Country Quiz | 0 | - | 4.63 | 54,200 |
| History of Austria | 0 | - | 4.70 | 17,991 |
| Geography of the French Empire | 0 | - | 4.45 | 27,230 |
| The French Revolution | 0 | - | 4.47 | 24,165 |
| France Multiple Choice | 0 | - | 4.39 | 40,874 |
| History of France | 0 | - | 4.61 | 57,715 |
| Biggest Cities in Germany in 1910 | 0 | - | 4.41 | 23,573 |
| Figures from Greek Mythology | 0 | - | 4.91 | 189,181 |
| Roman Numeral Decoding Quiz | 0 | - | 4.94 | 440,336 |
| The Vikings! | 0 | - | 4.46 | 28,419 |
| Sweden Immigration by Country | 0 | - | 4.53 | 56,437 |
| The Portuguese Empire | 0 | - | 4.58 | 12,116 |
| American to British Word Translation | 0 | - | 4.14 | 139,805 |
| Languages of the United Kingdom | 0 | - | 4.14 | 41,089 |
| Champions League Top 4 | 0 | - | 4.78 | 139,514 |
| East Asia Map Quiz | 0 | - | 4.99 | 1,453,293 |
| Asia Map Quiz | 0 | - | 4.99 | 926,564 |
| A Quiz About Islam | 0 | - | 4.32 | 48,661 |
| Countries That Don't Recognize Israel | 0 | - | 4.68 | 35,227 |
| Africa Map Quiz | 0 | - | 5.00 | 2,130,548 |
| Most Common English Verbs - Extreme | 0 | - | 4.96 | 158,744 |
| Oceanian Capitals - Map Quiz | 0 | - | 4.96 | 51,585 |
| Australia Map Quiz | 0 | - | 4.95 | 346,451 |
| U.S. Geography by Letter - B | 0 | - | 4.54 | 70,131 |
| U.S. Geography by Letter - S | 0 | - | 4.55 | 58,518 |
| U.S. Federal Holidays | 0 | - | 4.33 | 99,646 |
| United States Map Quiz | 0 | - | 4.98 | 4,173,300 |
| Two Letter U.S. State Abbreviations | 0 | - | 4.19 | 750,276 |
| Mediterranean Countries Quiz | 0 | - | 4.99 | 214,293 |
