| European Countries by First 2 Letters | 0 | - | 4.95 | 532,993 |
| Most Guessed Cities in Europe - Not Capitals | 0 | - | 4.83 | 88,127 |
| European Geography By Letter - P #1 | 0 | - | 4.81 | 99,085 |
| European Geography By Letter - B #2 | 0 | - | 4.87 | 89,060 |
| Category Elimination - European Geography #3 | 0 | - | 4.86 | 82,157 |
| Federal Subjects of Russia | 0 | - | 4.95 | 149,904 |
| Famous Germans | 0 | - | 4.50 | 55,863 |
| Famous Italians by Clue | 0 | - | 4.45 | 90,530 |
| Count to 10 in Europe: Pro | 0 | - | 4.86 | 69,852 |
| Official European Union Languages | 0 | - | 4.97 | 240,354 |
| European Countries in their Native Language | 0 | - | 4.99 | 158,804 |
| Europe by Borders in 30 Seconds | 0 | - | 4.98 | 431,366 |
| Pre-Euro Currencies | 0 | - | 4.44 | 52,778 |
| Countries that Border Poland | 0 | - | 4.99 | 173,331 |
| Famous Russians | 0 | - | 4.16 | 23,925 |
| Europe Geography Decoder | 0 | - | 4.87 | 70,376 |
| Famous French People | 0 | - | 4.05 | 36,155 |
| Countries that Beat Switzerland | 0 | - | 4.88 | 42,098 |
| Celtic Nations | 0 | - | 4.61 | 47,125 |
| European Geography By Letter - A | 0 | - | 4.52 | 148,342 |
| European Geography By Letter - B #1 | 0 | - | 4.62 | 121,740 |
| European Geography By Letter - C | 0 | - | 4.44 | 124,248 |
| European Geography By Letter - D | 0 | - | 4.49 | 118,704 |
| European Geography By Letter - L | 0 | - | 4.52 | 115,262 |
| European Geography By Letter - M | 0 | - | 4.69 | 132,774 |
| European Geography By Letter - N | 0 | - | 4.44 | 102,277 |
| European Geography By Letter - R | 0 | - | 4.43 | 94,884 |
| European Geography By Letter - V | 0 | - | 4.43 | 94,164 |
| European Geography By Letter - T | 0 | - | 4.41 | 83,779 |
| European Geography By Letter - S #1 | 0 | - | 4.63 | 101,560 |
| Countries of Europe with an Empty Map | 0 | - | 5.00 | 313,136 |
| All First-Level Subdivisions of Europe on a Map | 0 | - | 4.99 | 176,459 |
| Famous Swiss and Austrian People | 0 | - | 4.45 | 14,679 |
| Famous Dutch and Belgian People | 0 | - | 4.56 | 18,158 |
| Germany Multiple Choice | 0 | - | 4.84 | 54,745 |
| States of the German Confederation in 1848 | 0 | - | 4.90 | 32,509 |
| "Big Five" European Soccer Champions Since 2000 | 0 | - | 4.97 | 362,545 |
| Add A Letter - Make a European City | 0 | - | 4.88 | 23,534 |
| U.S. Citizenship Test Questions | 0 | - | 4.83 | 240,959 |
| Catholic Countries in Europe | 0 | - | 4.83 | 95,892 |
| Russian History A-Z | 0 | - | 4.35 | 32,293 |
| States of Germany | 0 | - | 4.95 | 154,901 |
| Germany Immigration by Country | 0 | - | 4.86 | 81,796 |
| Famous Irish People | 0 | - | 4.05 | 46,078 |
| Regions of Italy | 0 | - | 4.92 | 77,247 |
| Netherlands Immigration by Country | 0 | - | 4.93 | 52,904 |
| Famous Nordic People | 0 | - | 4.34 | 20,335 |
| Famous Spaniards Quiz | 0 | - | 4.24 | 11,648 |
| Regions of Spain Quiz | 0 | - | 4.90 | 115,564 |
| Cantons of Switzerland | 0 | - | 4.98 | 51,890 |
| Champions League Winners | 0 | - | 4.92 | 1,017,787 |
| Asian Geography By Letter - B | 0 | - | 4.85 | 67,105 |
| Biggest Countries in Europe in 1700 | 0 | - | 4.73 | 58,814 |
| Countries That Border Russia | 0 | - | 4.98 | 464,879 |
| United Kingdom A-Z | 0 | - | 4.51 | 88,434 |
| 10 Closest Megacities to London | 0 | - | 4.90 | 17,861 |
| European Geography By Letter - E | 0 | - | 4.23 | 115,392 |
| European Geography By Letter - F | 0 | - | 4.15 | 94,644 |
| European Geography By Letter - H | 0 | - | 4.30 | 97,338 |
| European Geography By Letter - G | 0 | - | 4.27 | 104,112 |
| European Geography By Letter - I | 0 | - | 4.07 | 96,693 |
| European Geography By Letter - K | 0 | - | 4.15 | 71,336 |
| European Geography By Letter - O | 0 | - | 4.29 | 63,720 |
| 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 | 49,517 |
| Category Elimination - European Geography #1 | 0 | - | 4.98 | 236,286 |
| European Map without 10 Random Countries | 0 | - | 4.97 | 279,281 |
| Category Elimination - European Geography #2 | 0 | - | 4.99 | 169,219 |
| Russia Country Quiz | 0 | - | 4.83 | 115,427 |
| Croatia Country Quiz | 0 | - | 4.83 | 43,824 |
| Bosnia and Herzegovina Country Quiz | 0 | - | 4.83 | 35,631 |
| Departments of France | 0 | - | 4.93 | 55,380 |
| Countries Surrounding Rome | 0 | - | 4.97 | 49,775 |
| History of The Netherlands | 0 | - | 4.46 | 17,571 |
| English Monarchs in Order by First Letter | 0 | - | 4.38 | 32,202 |
| Famous Scottish People | 0 | - | 4.22 | 18,443 |
| England or Wales? | 0 | - | 4.94 | 46,018 |
| All UEFA Champions League Teams Ever | 0 | - | 4.85 | 132,442 |
| Famous Australians by Description | 0 | - | 4.23 | 28,185 |
| 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 | 123,865 |
| Name a Major European City A-Z | 0 | - | 4.33 | 49,910 |
| 100 Longest Rivers in Europe - with a Map | 0 | - | 4.94 | 66,042 |
| Slavic Languages | 0 | - | 4.67 | 54,776 |
| Poland Country Quiz | 0 | - | 4.20 | 63,810 |
| Non-Bordering Countries Closest to Russia | 0 | - | 4.91 | 83,345 |
| Countries that Border Hungary | 0 | - | 4.98 | 105,092 |
| North Macedonia Country Quiz | 0 | - | 4.81 | 28,086 |
| Moldova Country Quiz | 0 | - | 4.82 | 31,061 |
| Countries Bordering Serbia | 0 | - | 4.96 | 93,200 |
| French Geography Quiz #1 | 0 | - | 4.89 | 35,234 |
| France A-Z | 0 | - | 4.16 | 38,359 |
| Letters of the Greek Alphabet | 0 | - | 4.97 | 652,825 |
| Name that Greek Letter | 0 | - | 4.93 | 325,237 |
| Capitals of Italian Regions | 0 | - | 4.62 | 36,758 |
| Spanish Immigration by Country | 0 | - | 4.63 | 55,665 |
| Switzerland A-Z | 0 | - | 4.45 | 25,786 |
| Top European Languages on a Map | 0 | - | 4.77 | 132,998 |
| History of Russia Quiz | 0 | - | 4.47 | 32,024 |
| Russia Multiple Choice | 0 | - | 4.58 | 40,900 |
| Countries that Beat Russia | 0 | - | 4.81 | 83,734 |
| Countries Bordering Ukraine, with an Empty Map | 0 | - | 4.86 | 96,902 |
| Ancient Greece A-Z | 0 | - | 4.60 | 23,258 |
| The Trojan War | 0 | - | 4.83 | 40,046 |
| Greek Mythology General Knowledge #1 | 0 | - | 4.85 | 113,160 |
| History of Italy | 0 | - | 4.55 | 32,182 |
| Italy Multiple Choice | 0 | - | 4.74 | 104,513 |
| Ancient Roman Trivia #1 | 0 | - | 4.85 | 85,682 |
| Roman Emperors | 0 | - | 4.95 | 121,407 |
| Geography of the Dutch Empire | 0 | - | 4.62 | 34,845 |
| 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 | 17,481 |
| London A-Z | 0 | - | 4.10 | 40,899 |
| Asian Cities A-Z by Clue | 0 | - | 4.52 | 43,080 |
| Asian Countries by First 2 Letters | 0 | - | 4.91 | 280,970 |
| Famous Chinese People | 0 | - | 4.09 | 11,933 |
| Africa A-Z | 0 | - | 4.57 | 46,796 |
| African Countries by First 2 Letters | 0 | - | 4.96 | 269,629 |
| Famous Mexicans and Mexican-Americans | 0 | - | 4.15 | 16,968 |
| Major non-NATO U.S. Allies | 0 | - | 4.52 | 52,592 |
| Europe Map Quiz | 0 | - | 5.00 | 4,792,822 |
| Europe Geography Quiz #1 | 0 | - | 4.55 | 71,566 |
| Europe Geography Quiz #2 | 0 | - | 4.57 | 72,237 |
| Europe Geography Quiz #4 | 0 | - | 4.57 | 70,506 |
| Europe Geography Quiz #5 | 0 | - | 4.55 | 61,462 |
| Most Mentioned Allies of Russia | 0 | - | 4.49 | 38,221 |
| Most Mentioned Enemies of Russia | 0 | - | 4.69 | 90,403 |
| Capitals of French Regions | 0 | - | 4.45 | 16,195 |
| Regions of France | 0 | - | 4.70 | 122,376 |
| France Immigration by Country | 0 | - | 4.70 | 77,002 |
| German Groups of Things | 0 | - | 4.47 | 38,666 |
| 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 | 49,062 |
| Largest Islands of Greece | 0 | - | 4.59 | 48,567 |
| Olympian Gods Quiz | 0 | - | 4.96 | 504,357 |
| Ancient Greek Words | 0 | - | 4.93 | 112,635 |
| Provinces of the Netherlands | 0 | - | 4.80 | 41,930 |
| 100 Greatest Britons Quiz | 0 | - | 4.41 | 48,439 |
| Foods in a Full English Breakfast | 0 | - | 4.46 | 103,942 |
| Name Every Beatles Song | 0 | - | 4.97 | 238,677 |
| Bohemian Rhapsody Lyrics | 0 | - | 4.98 | 292,976 |
| Asian Geography By Letter - A | 0 | - | 4.64 | 71,522 |
| Asian Geography by Letter - H | 0 | - | 4.50 | 66,136 |
| Asian Geography By Letter - M | 0 | - | 4.48 | 61,712 |
| Asian Geography by Letter - P | 0 | - | 4.45 | 58,270 |
| Asian Geography by Letter - T | 0 | - | 4.52 | 57,710 |
| Asian Geography By Letter - L | 0 | - | 4.49 | 43,380 |
| Asian Geography By Letter - O | 0 | - | 4.66 | 32,378 |
| Middle East A-Z | 0 | - | 4.47 | 46,270 |
| 100 Most Common English Words | 0 | - | 4.88 | 1,327,471 |
| Oceania Map Quiz | 0 | - | 4.98 | 660,248 |
| Australian Capitals | 0 | - | 4.92 | 62,861 |
| Canada A-Z | 0 | - | 4.73 | 32,992 |
| European Physical Geography | 0 | - | 4.26 | 33,616 |
| Albania Country Quiz | 0 | - | 4.54 | 39,294 |
| Geography of Russia | 0 | - | 4.57 | 21,616 |
| Czech Republic Country Quiz | 0 | - | 4.52 | 42,503 |
| Slovakia... or Slovenia? | 0 | - | 4.69 | 42,157 |
| Ukraine Country Quiz | 0 | - | 4.43 | 48,041 |
| Hungary Country Quiz | 0 | - | 4.49 | 43,830 |
| Romania Country Quiz | 0 | - | 4.63 | 54,204 |
| Serbia Country Quiz | 0 | - | 4.44 | 35,253 |
| 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 | 57,718 |
| Biggest Cities in Germany in 1910 | 0 | - | 4.41 | 23,573 |
| Roman Numeral Decoding Quiz | 0 | - | 4.94 | 440,350 |
| Two Letter Roman Numerals | 0 | - | 4.97 | 56,609 |
| The Vikings! | 0 | - | 4.46 | 28,419 |
| Sweden Immigration by Country | 0 | - | 4.53 | 56,438 |
| The Portuguese Empire | 0 | - | 4.58 | 12,117 |
| American to British Word Translation | 0 | - | 4.14 | 139,810 |
| Languages of the United Kingdom | 0 | - | 4.14 | 41,091 |
| The Thirteen Dwarves in the Hobbit | 0 | - | 4.81 | 28,844 |
| Champions League Top 4 | 0 | - | 4.78 | 139,527 |
| East Asia Map Quiz | 0 | - | 4.99 | 1,453,336 |
| Asia Map Quiz | 0 | - | 4.99 | 926,619 |
| A Quiz About Islam | 0 | - | 4.32 | 48,661 |
| Countries That Don't Recognize Israel | 0 | - | 4.68 | 35,228 |
| Africa Map Quiz | 0 | - | 5.00 | 2,130,606 |
| Most Common English Verbs - Extreme | 0 | - | 4.96 | 158,757 |
| Oceanian Capitals - Map Quiz | 0 | - | 4.96 | 51,588 |
| Australia Map Quiz | 0 | - | 4.95 | 346,469 |
| U.S. Geography by Letter - B | 0 | - | 4.54 | 70,142 |
| U.S. Geography by Letter - S | 0 | - | 4.55 | 58,537 |
| U.S. Federal Holidays | 0 | - | 4.33 | 99,646 |
| United States Map Quiz | 0 | - | 4.98 | 4,173,367 |
| Two Letter U.S. State Abbreviations | 0 | - | 4.19 | 750,293 |
| Famous Canadians Quiz | 0 | - | 3.94 | 23,431 |
| Mediterranean Countries Quiz | 0 | - | 4.99 | 214,309 |
| Countries with Territorial Claims in Antarctica | 0 | - | 4.94 | 92,981 |
| Countries That Use the Euro | 0 | - | 4.95 | 107,186 |
| Europe Cities Map Quiz | 0 | - | 4.99 | 366,559 |
| Europe Geography Quiz #3 | 0 | - | 4.35 | 63,937 |
