| European Countries by First 2 Letters | 0 | - | 4.95 | 533,018 |
| Most Guessed Cities in Europe - Not Capitals | 0 | - | 4.83 | 88,130 |
| European Geography By Letter - P #1 | 0 | - | 4.81 | 99,090 |
| European Geography By Letter - B #2 | 0 | - | 4.87 | 89,066 |
| Category Elimination - European Geography #3 | 0 | - | 4.86 | 82,161 |
| Federal Subjects of Russia | 0 | - | 4.95 | 149,915 |
| Famous Germans | 0 | - | 4.50 | 55,867 |
| Famous Italians by Clue | 0 | - | 4.45 | 90,531 |
| Count to 10 in Europe: Pro | 0 | - | 4.86 | 69,855 |
| Official European Union Languages | 0 | - | 4.97 | 240,361 |
| European Countries in their Native Language | 0 | - | 4.99 | 158,809 |
| Europe by Borders in 30 Seconds | 0 | - | 4.98 | 431,382 |
| Pre-Euro Currencies | 0 | - | 4.44 | 52,782 |
| Countries that Border Poland | 0 | - | 4.99 | 173,341 |
| Famous Russians | 0 | - | 4.16 | 23,925 |
| Europe Geography Decoder | 0 | - | 4.87 | 70,378 |
| Famous French People | 0 | - | 4.05 | 36,156 |
| Countries that Beat Switzerland | 0 | - | 4.88 | 42,102 |
| Celtic Nations | 0 | - | 4.61 | 47,127 |
| European Geography By Letter - A | 0 | - | 4.52 | 148,344 |
| European Geography By Letter - B #1 | 0 | - | 4.62 | 121,748 |
| European Geography By Letter - C | 0 | - | 4.44 | 124,253 |
| European Geography By Letter - D | 0 | - | 4.49 | 118,723 |
| European Geography By Letter - L | 0 | - | 4.52 | 115,268 |
| European Geography By Letter - M | 0 | - | 4.69 | 132,777 |
| European Geography By Letter - N | 0 | - | 4.44 | 102,277 |
| European Geography By Letter - R | 0 | - | 4.43 | 94,885 |
| European Geography By Letter - V | 0 | - | 4.43 | 94,165 |
| European Geography By Letter - T | 0 | - | 4.41 | 83,783 |
| European Geography By Letter - S #1 | 0 | - | 4.63 | 101,560 |
| Countries of Europe with an Empty Map | 0 | - | 5.00 | 313,166 |
| All First-Level Subdivisions of Europe on a Map | 0 | - | 4.99 | 176,486 |
| Famous Swiss and Austrian People | 0 | - | 4.45 | 14,680 |
| Famous Dutch and Belgian People | 0 | - | 4.56 | 18,159 |
| Germany Multiple Choice | 0 | - | 4.84 | 54,747 |
| States of the German Confederation in 1848 | 0 | - | 4.90 | 32,509 |
| "Big Five" European Soccer Champions Since 2000 | 0 | - | 4.97 | 362,596 |
| Add A Letter - Make a European City | 0 | - | 4.88 | 23,534 |
| U.S. Citizenship Test Questions | 0 | - | 4.83 | 240,963 |
| Catholic Countries in Europe | 0 | - | 4.83 | 95,897 |
| Russian History A-Z | 0 | - | 4.35 | 32,297 |
| States of Germany | 0 | - | 4.95 | 154,921 |
| Germany Immigration by Country | 0 | - | 4.86 | 81,799 |
| Famous Irish People | 0 | - | 4.05 | 46,078 |
| Regions of Italy | 0 | - | 4.92 | 77,255 |
| Netherlands Immigration by Country | 0 | - | 4.93 | 52,909 |
| Famous Nordic People | 0 | - | 4.34 | 20,336 |
| Famous Spaniards Quiz | 0 | - | 4.24 | 11,649 |
| Regions of Spain Quiz | 0 | - | 4.90 | 115,573 |
| Cantons of Switzerland | 0 | - | 4.98 | 51,893 |
| Champions League Winners | 0 | - | 4.92 | 1,017,900 |
| Asian Geography By Letter - B | 0 | - | 4.85 | 67,108 |
| Biggest Countries in Europe in 1700 | 0 | - | 4.73 | 58,817 |
| Countries That Border Russia | 0 | - | 4.98 | 464,901 |
| United Kingdom A-Z | 0 | - | 4.51 | 88,443 |
| 10 Closest Megacities to London | 0 | - | 4.90 | 17,862 |
| European Geography By Letter - E | 0 | - | 4.23 | 115,395 |
| European Geography By Letter - F | 0 | - | 4.15 | 94,646 |
| European Geography By Letter - H | 0 | - | 4.30 | 97,340 |
| European Geography By Letter - G | 0 | - | 4.27 | 104,115 |
| European Geography By Letter - I | 0 | - | 4.07 | 96,694 |
| European Geography By Letter - K | 0 | - | 4.15 | 71,338 |
| European Geography By Letter - O | 0 | - | 4.29 | 63,720 |
| European Geography by Letter - W | 0 | - | 4.21 | 83,689 |
| European Geography By Letter - S #2 | 0 | - | 4.20 | 51,991 |
| European Geography A-Z | 0 | - | 4.29 | 49,522 |
| Category Elimination - European Geography #1 | 0 | - | 4.98 | 236,310 |
| European Map without 10 Random Countries | 0 | - | 4.97 | 279,294 |
| Category Elimination - European Geography #2 | 0 | - | 4.99 | 169,242 |
| Russia Country Quiz | 0 | - | 4.83 | 115,443 |
| Croatia Country Quiz | 0 | - | 4.83 | 43,827 |
| Bosnia and Herzegovina Country Quiz | 0 | - | 4.83 | 35,635 |
| Departments of France | 0 | - | 4.93 | 55,388 |
| Countries Surrounding Rome | 0 | - | 4.97 | 49,778 |
| History of The Netherlands | 0 | - | 4.46 | 17,571 |
| English Monarchs in Order by First Letter | 0 | - | 4.38 | 32,214 |
| Famous Scottish People | 0 | - | 4.22 | 18,443 |
| England or Wales? | 0 | - | 4.94 | 46,025 |
| All UEFA Champions League Teams Ever | 0 | - | 4.85 | 132,457 |
| Famous Australians by Description | 0 | - | 4.23 | 28,187 |
| European Countries with the Fewest Overnight Visitors | 0 | - | 4.80 | 41,740 |
| Word Scramble - European Countries | 0 | - | 4.73 | 142,435 |
| Top 20 Football Clubs in Europe | 0 | - | 4.48 | 123,953 |
| Name a Major European City A-Z | 0 | - | 4.33 | 49,917 |
| 100 Longest Rivers in Europe - with a Map | 0 | - | 4.94 | 66,045 |
| Slavic Languages | 0 | - | 4.67 | 54,778 |
| Poland Country Quiz | 0 | - | 4.20 | 63,812 |
| Non-Bordering Countries Closest to Russia | 0 | - | 4.91 | 83,351 |
| Countries that Border Hungary | 0 | - | 4.98 | 105,103 |
| North Macedonia Country Quiz | 0 | - | 4.81 | 28,091 |
| Moldova Country Quiz | 0 | - | 4.82 | 31,063 |
| Countries Bordering Serbia | 0 | - | 4.96 | 93,207 |
| French Geography Quiz #1 | 0 | - | 4.89 | 35,252 |
| France A-Z | 0 | - | 4.16 | 38,361 |
| Letters of the Greek Alphabet | 0 | - | 4.97 | 652,877 |
| Name that Greek Letter | 0 | - | 4.93 | 325,250 |
| Capitals of Italian Regions | 0 | - | 4.62 | 36,758 |
| Spanish Immigration by Country | 0 | - | 4.63 | 55,665 |
| Switzerland A-Z | 0 | - | 4.45 | 25,788 |
| Top European Languages on a Map | 0 | - | 4.77 | 133,000 |
| History of Russia Quiz | 0 | - | 4.47 | 32,025 |
| Russia Multiple Choice | 0 | - | 4.58 | 40,903 |
| Countries that Beat Russia | 0 | - | 4.81 | 83,739 |
| Countries Bordering Ukraine, with an Empty Map | 0 | - | 4.86 | 96,904 |
| Ancient Greece A-Z | 0 | - | 4.60 | 23,259 |
| The Trojan War | 0 | - | 4.83 | 40,059 |
| Greek Mythology General Knowledge #1 | 0 | - | 4.85 | 113,174 |
| History of Italy | 0 | - | 4.55 | 32,183 |
| Italy Multiple Choice | 0 | - | 4.74 | 104,515 |
| Ancient Roman Trivia #1 | 0 | - | 4.85 | 85,687 |
| Roman Emperors | 0 | - | 4.95 | 121,421 |
| Geography of the Dutch Empire | 0 | - | 4.62 | 34,849 |
| 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 | 18,234 |
| London A-Z | 0 | - | 4.10 | 40,905 |
| Asian Cities A-Z by Clue | 0 | - | 4.52 | 43,082 |
| Asian Countries by First 2 Letters | 0 | - | 4.91 | 281,011 |
| Famous Chinese People | 0 | - | 4.09 | 11,933 |
| Africa A-Z | 0 | - | 4.57 | 46,797 |
| African Countries by First 2 Letters | 0 | - | 4.96 | 269,645 |
| Famous Mexicans and Mexican-Americans | 0 | - | 4.15 | 16,968 |
| Major non-NATO U.S. Allies | 0 | - | 4.52 | 52,593 |
| Europe Map Quiz | 0 | - | 5.00 | 4,793,055 |
| Europe Geography Quiz #1 | 0 | - | 4.55 | 71,570 |
| Europe Geography Quiz #2 | 0 | - | 4.57 | 72,239 |
| Europe Geography Quiz #4 | 0 | - | 4.57 | 70,512 |
| Europe Geography Quiz #5 | 0 | - | 4.55 | 61,465 |
| Most Mentioned Allies of Russia | 0 | - | 4.49 | 38,221 |
| Most Mentioned Enemies of Russia | 0 | - | 4.69 | 90,407 |
| Capitals of French Regions | 0 | - | 4.45 | 16,198 |
| Regions of France | 0 | - | 4.70 | 122,393 |
| France Immigration by Country | 0 | - | 4.70 | 77,005 |
| German Groups of Things | 0 | - | 4.47 | 38,668 |
| Capitals of German States | 0 | - | 4.74 | 29,094 |
| Chancellors of Germany, 1949–present | 0 | - | 4.60 | 23,579 |
| Germany True or False? | 0 | - | 4.61 | 49,063 |
| Largest Islands of Greece | 0 | - | 4.59 | 48,568 |
| Olympian Gods Quiz | 0 | - | 4.96 | 504,378 |
| Ancient Greek Words | 0 | - | 4.93 | 112,647 |
| Provinces of the Netherlands | 0 | - | 4.80 | 41,931 |
| 100 Greatest Britons Quiz | 0 | - | 4.41 | 48,447 |
| Foods in a Full English Breakfast | 0 | - | 4.46 | 103,948 |
| Name Every Beatles Song | 0 | - | 4.97 | 238,686 |
| Bohemian Rhapsody Lyrics | 0 | - | 4.98 | 292,986 |
| Asian Geography By Letter - A | 0 | - | 4.64 | 71,527 |
| Asian Geography by Letter - H | 0 | - | 4.50 | 66,140 |
| Asian Geography By Letter - M | 0 | - | 4.48 | 61,715 |
| Asian Geography by Letter - P | 0 | - | 4.45 | 58,273 |
| Asian Geography by Letter - T | 0 | - | 4.52 | 57,714 |
| Asian Geography By Letter - L | 0 | - | 4.49 | 43,381 |
| Asian Geography By Letter - O | 0 | - | 4.66 | 32,382 |
| Middle East A-Z | 0 | - | 4.47 | 46,271 |
| 100 Most Common English Words | 0 | - | 4.88 | 1,327,533 |
| Oceania Map Quiz | 0 | - | 4.98 | 660,280 |
| Australian Capitals | 0 | - | 4.92 | 62,861 |
| Canada A-Z | 0 | - | 4.73 | 32,992 |
| European Physical Geography | 0 | - | 4.26 | 33,617 |
| Albania Country Quiz | 0 | - | 4.54 | 39,297 |
| Geography of Russia | 0 | - | 4.57 | 21,617 |
| Czech Republic Country Quiz | 0 | - | 4.52 | 42,503 |
| Slovakia... or Slovenia? | 0 | - | 4.69 | 42,157 |
| Ukraine Country Quiz | 0 | - | 4.43 | 48,044 |
| Hungary Country Quiz | 0 | - | 4.49 | 43,832 |
| Romania Country Quiz | 0 | - | 4.63 | 54,207 |
| Serbia Country Quiz | 0 | - | 4.44 | 35,257 |
| History of Austria | 0 | - | 4.70 | 17,992 |
| Geography of the French Empire | 0 | - | 4.45 | 27,232 |
| The French Revolution | 0 | - | 4.47 | 24,165 |
| France Multiple Choice | 0 | - | 4.39 | 40,875 |
| History of France | 0 | - | 4.61 | 57,719 |
| Biggest Cities in Germany in 1910 | 0 | - | 4.41 | 23,575 |
| Roman Numeral Decoding Quiz | 0 | - | 4.94 | 440,377 |
| Two Letter Roman Numerals | 0 | - | 4.97 | 56,613 |
| The Vikings! | 0 | - | 4.46 | 28,421 |
| Sweden Immigration by Country | 0 | - | 4.53 | 56,439 |
| The Portuguese Empire | 0 | - | 4.58 | 12,117 |
| American to British Word Translation | 0 | - | 4.14 | 139,815 |
| Languages of the United Kingdom | 0 | - | 4.14 | 41,091 |
| The Thirteen Dwarves in the Hobbit | 0 | - | 4.81 | 28,845 |
| Champions League Top 4 | 0 | - | 4.78 | 139,543 |
| East Asia Map Quiz | 0 | - | 4.99 | 1,453,370 |
| Asia Map Quiz | 0 | - | 4.99 | 926,667 |
| A Quiz About Islam | 0 | - | 4.32 | 48,662 |
| Countries That Don't Recognize Israel | 0 | - | 4.68 | 35,230 |
| Africa Map Quiz | 0 | - | 5.00 | 2,130,690 |
| Most Common English Verbs - Extreme | 0 | - | 4.96 | 158,768 |
| Oceanian Capitals - Map Quiz | 0 | - | 4.96 | 51,598 |
| Australia Map Quiz | 0 | - | 4.95 | 346,480 |
| U.S. Geography by Letter - B | 0 | - | 4.54 | 70,145 |
| U.S. Geography by Letter - S | 0 | - | 4.55 | 58,544 |
| U.S. Federal Holidays | 0 | - | 4.33 | 99,647 |
| United States Map Quiz | 0 | - | 4.98 | 4,173,444 |
| Two Letter U.S. State Abbreviations | 0 | - | 4.19 | 750,304 |
| Famous Canadians Quiz | 0 | - | 3.94 | 23,431 |
| Mediterranean Countries Quiz | 0 | - | 4.99 | 214,321 |
| Countries with Territorial Claims in Antarctica | 0 | - | 4.94 | 92,982 |
| Countries That Use the Euro | 0 | - | 4.95 | 107,213 |
| Europe Cities Map Quiz | 0 | - | 4.99 | 366,578 |
| Europe Geography Quiz #3 | 0 | - | 4.35 | 63,941 |
