| Federal Subjects of Russia | 0 | - | 4.95 | 148,353 |
| European Countries by First 2 Letters | 0 | - | 4.95 | 531,085 |
| Most Guessed Cities in Europe - Not Capitals | 0 | - | 4.82 | 87,755 |
| European Geography By Letter - P #1 | 0 | - | 4.81 | 98,239 |
| European Geography By Letter - B #2 | 0 | - | 4.86 | 87,584 |
| Category Elimination - European Geography #3 | 0 | - | 4.86 | 81,500 |
| Countries That Border Russia | 0 | - | 4.98 | 463,367 |
| Russia Country Quiz | 0 | - | 4.83 | 114,810 |
| Famous Germans | 0 | - | 4.50 | 55,589 |
| Famous Italians by Clue | 0 | - | 4.45 | 89,935 |
| Count to 10 in Europe: Pro | 0 | - | 4.86 | 69,436 |
| Official European Union Languages | 0 | - | 4.97 | 239,160 |
| European Countries in their Native Language | 0 | - | 4.99 | 158,269 |
| Europe by Borders in 30 Seconds | 0 | - | 4.98 | 429,642 |
| Pre-Euro Currencies | 0 | - | 4.44 | 52,673 |
| Non-Bordering Countries Closest to Russia | 0 | - | 4.91 | 83,049 |
| Europe Geography Decoder | 0 | - | 4.86 | 70,165 |
| Famous French People | 0 | - | 4.07 | 35,933 |
| Countries that Beat Switzerland | 0 | - | 4.88 | 41,948 |
| History of Russia Quiz | 0 | - | 4.47 | 31,973 |
| Add A Letter - Make a European City | 0 | - | 4.90 | 23,456 |
| Celtic Nations | 0 | - | 4.69 | 47,026 |
| European Geography By Letter - A | 0 | - | 4.52 | 147,124 |
| European Geography By Letter - B #1 | 0 | - | 4.69 | 120,529 |
| European Geography By Letter - C | 0 | - | 4.46 | 114,908 |
| European Geography By Letter - D | 0 | - | 4.50 | 109,453 |
| European Geography By Letter - L | 0 | - | 4.52 | 114,121 |
| European Geography By Letter - M | 0 | - | 4.67 | 131,517 |
| European Geography By Letter - N | 0 | - | 4.44 | 101,299 |
| European Geography By Letter - R | 0 | - | 4.43 | 94,118 |
| European Geography By Letter - V | 0 | - | 4.42 | 93,369 |
| European Geography By Letter - T | 0 | - | 4.41 | 82,957 |
| European Geography By Letter - S #1 | 0 | - | 4.63 | 100,978 |
| Countries of Europe with an Empty Map | 0 | - | 5.00 | 311,749 |
| All First-Level Subdivisions of Europe on a Map | 0 | - | 4.98 | 174,045 |
| Most Mentioned Allies of Russia | 0 | - | 4.49 | 38,107 |
| Most Mentioned Enemies of Russia | 0 | - | 4.69 | 90,190 |
| Famous Dutch and Belgian People | 0 | - | 4.56 | 18,099 |
| Germany Multiple Choice | 0 | - | 4.84 | 54,542 |
| States of the German Confederation in 1848 | 0 | - | 4.90 | 32,263 |
| "Big Five" European Soccer Champions Since 2000 | 0 | - | 4.97 | 359,049 |
| U.S. Citizenship Test Questions | 0 | - | 4.83 | 240,325 |
| Catholic Countries in Europe | 0 | - | 4.83 | 95,495 |
| Russian History A-Z | 0 | - | 4.35 | 31,928 |
| States of Germany | 0 | - | 4.95 | 153,636 |
| Germany Immigration by Country | 0 | - | 4.85 | 81,389 |
| Famous Irish People | 0 | - | 4.05 | 46,031 |
| Regions of Italy | 0 | - | 4.92 | 76,458 |
| Netherlands Immigration by Country | 0 | - | 4.93 | 52,531 |
| Famous Spaniards Quiz | 0 | - | 4.24 | 11,627 |
| Regions of Spain Quiz | 0 | - | 4.90 | 114,734 |
| Cantons of Switzerland | 0 | - | 4.98 | 51,502 |
| Champions League Winners | 0 | - | 4.92 | 1,011,304 |
| Asian Geography By Letter - B | 0 | - | 4.85 | 66,775 |
| Biggest Countries in Europe in 1700 | 0 | - | 4.73 | 58,648 |
| Geography of Russia | 0 | - | 4.57 | 21,560 |
| United Kingdom A-Z | 0 | - | 4.52 | 88,214 |
| 10 Closest Megacities to London | 0 | - | 4.90 | 17,775 |
| European Geography By Letter - E | 0 | - | 4.23 | 114,364 |
| European Geography By Letter - F | 0 | - | 4.17 | 93,708 |
| European Geography By Letter - H | 0 | - | 4.30 | 96,562 |
| European Geography By Letter - G | 0 | - | 4.27 | 103,248 |
| European Geography By Letter - I | 0 | - | 4.09 | 95,990 |
| European Geography By Letter - K | 0 | - | 4.14 | 70,615 |
| European Geography By Letter - O | 0 | - | 4.29 | 63,097 |
| European Geography by Letter - W | 0 | - | 4.21 | 83,224 |
| European Geography By Letter - S #2 | 0 | - | 4.20 | 51,501 |
| European Geography A-Z | 0 | - | 4.29 | 49,394 |
| Category Elimination - European Geography #1 | 0 | - | 4.98 | 234,615 |
| European Map without 10 Random Countries | 0 | - | 4.97 | 277,795 |
| Category Elimination - European Geography #2 | 0 | - | 4.99 | 168,044 |
| Croatia Country Quiz | 0 | - | 4.83 | 43,542 |
| Bosnia and Herzegovina Country Quiz | 0 | - | 4.86 | 35,452 |
| Departments of France | 0 | - | 4.93 | 54,652 |
| The Mafia Quiz | 0 | - | 4.46 | 23,395 |
| Countries Surrounding Rome | 0 | - | 4.97 | 49,649 |
| History of The Netherlands | 0 | - | 4.46 | 17,503 |
| English Monarchs in Order by First Letter | 0 | - | 4.38 | 32,001 |
| Famous Scottish People | 0 | - | 4.22 | 18,420 |
| England or Wales? | 0 | - | 4.94 | 45,841 |
| All UEFA Champions League Teams Ever | 0 | - | 4.85 | 131,299 |
| Famous Australians by Description | 0 | - | 4.23 | 28,043 |
| European Countries with the Fewest Overnight Visitors | 0 | - | 4.80 | 41,682 |
| Word Scramble - European Countries | 0 | - | 4.73 | 141,980 |
| Top 20 Football Clubs in Europe | 0 | - | 4.48 | 115,922 |
| Name a Major European City A-Z | 0 | - | 4.33 | 49,700 |
| 100 Longest Rivers in Europe - with a Map | 0 | - | 4.94 | 65,700 |
| Slavic Languages | 0 | - | 4.68 | 54,535 |
| Countries that Border Poland | 0 | - | 4.99 | 172,741 |
| Countries that Border Hungary | 0 | - | 4.98 | 104,510 |
| North Macedonia Country Quiz | 0 | - | 4.81 | 27,953 |
| Moldova Country Quiz | 0 | - | 4.82 | 30,918 |
| Countries Bordering Serbia | 0 | - | 4.96 | 92,763 |
| French Geography Quiz #1 | 0 | - | 4.89 | 34,945 |
| Famous Swiss and Austrian People | 0 | - | 4.45 | 14,652 |
| France A-Z | 0 | - | 4.16 | 38,288 |
| Letters of the Greek Alphabet | 0 | - | 4.97 | 649,777 |
| Name that Greek Letter | 0 | - | 4.93 | 324,400 |
| Capitals of Italian Regions | 0 | - | 4.62 | 36,686 |
| Spanish Immigration by Country | 0 | - | 4.63 | 55,545 |
| Switzerland A-Z | 0 | - | 4.45 | 25,710 |
| Top European Languages on a Map | 0 | - | 4.77 | 132,489 |
| Word Chain - Russia | 0 | - | 4.33 | 15,779 |
| Russia Multiple Choice | 0 | - | 4.58 | 40,802 |
| Countries that Beat Russia | 0 | - | 4.81 | 83,188 |
| Countries Bordering Ukraine, with an Empty Map | 0 | - | 4.86 | 96,606 |
| Ancient Greece A-Z | 0 | - | 4.60 | 23,194 |
| The Trojan War | 0 | - | 4.83 | 39,872 |
| Greek Mythology General Knowledge #1 | 0 | - | 4.85 | 112,456 |
| History of Italy | 0 | - | 4.55 | 32,090 |
| Italy Multiple Choice | 0 | - | 4.74 | 104,076 |
| Ancient Roman Trivia #1 | 0 | - | 4.85 | 85,227 |
| Roman Emperors | 0 | - | 4.95 | 120,620 |
| Geography of the Dutch Empire | 0 | - | 4.62 | 34,754 |
| Famous Nordic People | 0 | - | 4.34 | 20,207 |
| Countries of the Spanish Empire | 0 | - | 4.52 | 77,334 |
| The British Royal Family - Modern Times | 0 | - | 4.16 | 21,550 |
| People on Money - England | 0 | - | 4.29 | 16,627 |
| London A-Z | 0 | - | 4.10 | 40,836 |
| Asian Cities A-Z by Clue | 0 | - | 4.51 | 42,687 |
| Asian Countries by First 2 Letters | 0 | - | 4.91 | 279,968 |
| Famous Chinese People | 0 | - | 4.09 | 11,896 |
| Africa A-Z | 0 | - | 4.57 | 46,715 |
| African Countries by First 2 Letters | 0 | - | 4.96 | 268,802 |
| Major non-NATO U.S. Allies | 0 | - | 4.52 | 52,339 |
| Europe Map Quiz | 0 | - | 5.00 | 4,775,432 |
| Europe Geography Quiz #1 | 0 | - | 4.55 | 71,402 |
| Europe Geography Quiz #2 | 0 | - | 4.57 | 72,057 |
| Europe Geography Quiz #4 | 0 | - | 4.57 | 70,349 |
| Europe Geography Quiz #5 | 0 | - | 4.55 | 61,323 |
| Capitals of French Regions | 0 | - | 4.45 | 16,129 |
| Regions of France | 0 | - | 4.70 | 121,475 |
| France Immigration by Country | 0 | - | 4.70 | 76,745 |
| German Groups of Things | 0 | - | 4.46 | 38,560 |
| Capitals of German States | 0 | - | 4.74 | 29,017 |
| Chancellors of Germany, 1949–present | 0 | - | 4.60 | 23,434 |
| Germany True or False? | 0 | - | 4.61 | 48,926 |
| Largest Islands of Greece | 0 | - | 4.59 | 48,232 |
| Olympian Gods Quiz | 0 | - | 4.96 | 502,365 |
| Ancient Greek Words | 0 | - | 4.93 | 112,078 |
| Provinces of the Netherlands | 0 | - | 4.80 | 41,568 |
| 100 Greatest Britons Quiz | 0 | - | 4.41 | 48,368 |
| Foods in a Full English Breakfast | 0 | - | 4.46 | 103,544 |
| Name Every Beatles Song | 0 | - | 4.97 | 237,437 |
| Bohemian Rhapsody Lyrics | 0 | - | 4.98 | 292,221 |
| Asian Geography By Letter - A | 0 | - | 4.64 | 71,305 |
| Asian Geography by Letter - H | 0 | - | 4.50 | 65,886 |
| Asian Geography By Letter - M | 0 | - | 4.48 | 61,529 |
| Asian Geography by Letter - P | 0 | - | 4.45 | 58,045 |
| Asian Geography by Letter - T | 0 | - | 4.51 | 57,509 |
| Asian Geography By Letter - L | 0 | - | 4.49 | 43,170 |
| Asian Geography By Letter - O | 0 | - | 4.66 | 32,096 |
| Middle East A-Z | 0 | - | 4.47 | 46,182 |
| 100 Most Common English Words | 0 | - | 4.88 | 1,321,334 |
| Oceania Map Quiz | 0 | - | 4.98 | 656,382 |
| Australian Capitals | 0 | - | 4.92 | 62,780 |
| Canada A-Z | 0 | - | 4.73 | 32,912 |
| European Physical Geography | 0 | - | 4.26 | 33,559 |
| Albania Country Quiz | 0 | - | 4.54 | 39,124 |
| Czech Republic Country Quiz | 0 | - | 4.52 | 42,337 |
| Slovakia... or Slovenia? | 0 | - | 4.69 | 42,041 |
| Ukraine Country Quiz | 0 | - | 4.43 | 47,861 |
| Hungary Country Quiz | 0 | - | 4.49 | 43,612 |
| Romania Country Quiz | 0 | - | 4.63 | 53,967 |
| Serbia Country Quiz | 0 | - | 4.44 | 35,124 |
| History of Austria | 0 | - | 4.70 | 17,928 |
| Geography of the French Empire | 0 | - | 4.45 | 27,177 |
| The French Revolution | 0 | - | 4.47 | 24,083 |
| France Multiple Choice | 0 | - | 4.39 | 40,789 |
| History of France | 0 | - | 4.61 | 57,369 |
| Roman Numeral Decoding Quiz | 0 | - | 4.94 | 438,489 |
| Two Letter Roman Numerals | 0 | - | 4.97 | 56,337 |
| The Vikings! | 0 | - | 4.46 | 28,379 |
| Sweden Immigration by Country | 0 | - | 4.55 | 56,255 |
| The Portuguese Empire | 0 | - | 4.58 | 12,088 |
| American to British Word Translation | 0 | - | 4.14 | 139,425 |
| Languages of the United Kingdom | 0 | - | 4.13 | 40,978 |
| The Thirteen Dwarves in the Hobbit | 0 | - | 4.81 | 28,746 |
| Champions League Top 4 | 0 | - | 4.77 | 137,697 |
| East Asia Map Quiz | 0 | - | 4.99 | 1,450,277 |
| Asia Map Quiz | 0 | - | 4.99 | 921,262 |
| A Quiz About Islam | 0 | - | 4.31 | 48,532 |
| Countries That Don't Recognize Israel | 0 | - | 4.68 | 35,013 |
| Africa Map Quiz | 0 | - | 5.00 | 2,123,554 |
| Most Common English Verbs - Extreme | 0 | - | 4.96 | 157,892 |
| Oceanian Capitals - Map Quiz | 0 | - | 4.95 | 51,062 |
| Australia Map Quiz | 0 | - | 4.95 | 345,474 |
| U.S. Geography by Letter - B | 0 | - | 4.53 | 69,760 |
| U.S. Geography by Letter - S | 0 | - | 4.55 | 53,209 |
| U.S. Federal Holidays | 0 | - | 4.33 | 99,550 |
| United States Map Quiz | 0 | - | 4.98 | 4,165,322 |
| Two Letter U.S. State Abbreviations | 0 | - | 4.19 | 748,480 |
| Mediterranean Countries Quiz | 0 | - | 4.99 | 213,083 |
| Countries with Territorial Claims in Antarctica | 0 | - | 4.94 | 92,788 |
| Countries That Use the Euro | 0 | - | 4.95 | 105,927 |
| Europe Cities Map Quiz | 0 | - | 4.99 | 365,385 |
| Europe Geography Quiz #3 | 0 | - | 4.35 | 63,784 |
| 10 Easternmost Countries in Europe | 0 | - | 4.89 | 116,287 |
| Country Codes of Europe | 0 | - | 3.43 | 13,765 |
| The Only European Country ... | 0 | - | 4.91 | 217,847 |
