| European Countries by First 2 Letters | 0 | - | 4.95 | 526,130 |
| Most Guessed Cities in Europe - Not Capitals | 0 | - | 4.82 | 86,806 |
| European Geography By Letter - P #1 | 0 | - | 4.81 | 96,283 |
| European Geography By Letter - B #2 | 0 | - | 4.83 | 76,152 |
| Category Elimination - European Geography #3 | 0 | - | 4.85 | 79,688 |
| Federal Subjects of Russia | 0 | - | 4.94 | 143,735 |
| Count to 10 in Europe: Pro | 0 | - | 4.85 | 68,541 |
| Official European Union Languages | 0 | - | 4.97 | 236,406 |
| European Countries in their Native Language | 0 | - | 4.99 | 156,629 |
| Europe by Borders in 30 Seconds | 0 | - | 4.98 | 424,953 |
| Pre-Euro Currencies | 0 | - | 4.44 | 52,428 |
| Countries that Border Poland | 0 | - | 4.99 | 171,260 |
| Europe Geography Decoder | 0 | - | 4.86 | 69,496 |
| Countries that Beat Switzerland | 0 | - | 4.88 | 41,542 |
| Monarchies of the World | 0 | - | 4.94 | 166,455 |
| Add A Letter - Make a European City | 0 | - | 4.90 | 23,228 |
| Celtic Nations | 0 | - | 4.69 | 46,800 |
| European Geography By Letter - A | 0 | - | 4.56 | 132,331 |
| European Geography By Letter - B #1 | 0 | - | 4.67 | 110,838 |
| European Geography By Letter - C | 0 | - | 4.46 | 111,774 |
| European Geography By Letter - D | 0 | - | 4.50 | 106,646 |
| European Geography By Letter - L | 0 | - | 4.52 | 112,169 |
| European Geography By Letter - M | 0 | - | 4.61 | 128,804 |
| European Geography By Letter - N | 0 | - | 4.44 | 99,631 |
| European Geography By Letter - R | 0 | - | 4.42 | 92,594 |
| European Geography By Letter - V | 0 | - | 4.43 | 91,997 |
| European Geography By Letter - T | 0 | - | 4.41 | 81,257 |
| European Geography By Letter - S #1 | 0 | - | 4.63 | 99,562 |
| Countries of Europe with an Empty Map | 0 | - | 5.00 | 307,641 |
| All First-Level Subdivisions of Europe on a Map | 0 | - | 4.98 | 167,646 |
| Famous Germans | 0 | - | 4.50 | 54,578 |
| Germany Multiple Choice | 0 | - | 4.84 | 54,028 |
| Famous Italians by Clue | 0 | - | 4.45 | 88,276 |
| "Big Five" European Soccer Champions Since 2000 | 0 | - | 4.97 | 349,394 |
| Monarchies Bordering Monarchies | 0 | - | 4.85 | 59,939 |
| U.S. Citizenship Test Questions | 0 | - | 4.83 | 238,227 |
| Catholic Countries in Europe | 0 | - | 4.83 | 94,146 |
| Famous Russians | 0 | - | 4.16 | 23,714 |
| States of Germany | 0 | - | 4.96 | 149,878 |
| Germany Immigration by Country | 0 | - | 4.84 | 79,945 |
| Regions of Italy | 0 | - | 4.92 | 74,622 |
| Netherlands Immigration by Country | 0 | - | 4.94 | 43,758 |
| Regions of Spain Quiz | 0 | - | 4.90 | 112,189 |
| Cantons of Switzerland | 0 | - | 4.98 | 50,072 |
| The British Royal Family - Modern Times | 0 | - | 4.16 | 21,454 |
| English Monarchs in Order by First Letter | 0 | - | 4.38 | 31,298 |
| Champions League Winners | 0 | - | 4.92 | 995,474 |
| Asian Geography By Letter - B | 0 | - | 4.85 | 65,946 |
| Biggest Countries in Europe in 1700 | 0 | - | 4.73 | 58,111 |
| Countries That Border Russia | 0 | - | 4.98 | 458,661 |
| States of the German Confederation in 1848 | 0 | - | 4.89 | 31,493 |
| United Kingdom A-Z | 0 | - | 4.53 | 87,178 |
| 10 Closest Megacities to London | 0 | - | 4.90 | 17,397 |
| European Geography By Letter - E | 0 | - | 4.23 | 112,160 |
| European Geography By Letter - F | 0 | - | 4.17 | 91,404 |
| European Geography By Letter - H | 0 | - | 4.30 | 94,846 |
| European Geography By Letter - G | 0 | - | 4.25 | 101,223 |
| European Geography By Letter - I | 0 | - | 4.10 | 94,440 |
| European Geography By Letter - K | 0 | - | 4.14 | 69,116 |
| European Geography By Letter - O | 0 | - | 4.28 | 61,893 |
| European Geography by Letter - W | 0 | - | 4.20 | 82,273 |
| European Geography By Letter - S #2 | 0 | - | 4.19 | 50,482 |
| European Geography A-Z | 0 | - | 4.28 | 48,972 |
| Category Elimination - European Geography #1 | 0 | - | 4.98 | 230,313 |
| European Map without 10 Random Countries | 0 | - | 4.97 | 274,038 |
| Category Elimination - European Geography #2 | 0 | - | 4.99 | 164,988 |
| Russia Country Quiz | 0 | - | 4.85 | 113,585 |
| Croatia Country Quiz | 0 | - | 4.83 | 42,806 |
| Bosnia and Herzegovina Country Quiz | 0 | - | 4.86 | 35,005 |
| Departments of France | 0 | - | 4.93 | 52,711 |
| Countries Surrounding Rome | 0 | - | 4.97 | 49,348 |
| History of The Netherlands | 0 | - | 4.46 | 17,302 |
| England or Wales? | 0 | - | 4.94 | 45,289 |
| All UEFA Champions League Teams Ever | 0 | - | 4.84 | 128,353 |
| European Countries with the Fewest Overnight Visitors | 0 | - | 4.78 | 41,596 |
| Word Scramble - European Countries | 0 | - | 4.70 | 140,935 |
| Top 20 Football Clubs in Europe | 0 | - | 4.48 | 112,878 |
| Name a Major European City A-Z | 0 | - | 4.33 | 49,085 |
| 100 Longest Rivers in Europe - with a Map | 0 | - | 4.94 | 64,762 |
| Slavic Languages | 0 | - | 4.67 | 53,944 |
| Poland Country Quiz | 0 | - | 4.22 | 62,624 |
| Russian History A-Z | 0 | - | 4.38 | 30,577 |
| Non-Bordering Countries Closest to Russia | 0 | - | 4.91 | 82,346 |
| Countries that Border Hungary | 0 | - | 4.98 | 103,638 |
| North Macedonia Country Quiz | 0 | - | 4.81 | 27,589 |
| Moldova Country Quiz | 0 | - | 4.81 | 30,522 |
| Countries Bordering Serbia | 0 | - | 4.96 | 91,673 |
| French Geography Quiz #1 | 0 | - | 4.89 | 34,496 |
| Famous Swiss and Austrian People | 0 | - | 4.45 | 14,550 |
| Famous Dutch and Belgian People | 0 | - | 4.56 | 17,957 |
| France A-Z | 0 | - | 4.16 | 38,044 |
| Letters of the Greek Alphabet | 0 | - | 4.97 | 641,425 |
| Name that Greek Letter | 0 | - | 4.94 | 321,486 |
| Capitals of Italian Regions | 0 | - | 4.62 | 36,419 |
| Spanish Immigration by Country | 0 | - | 4.63 | 55,231 |
| Switzerland A-Z | 0 | - | 4.45 | 25,496 |
| Africa A-Z | 0 | - | 4.57 | 46,351 |
| African Countries by First 2 Letters | 0 | - | 4.96 | 266,387 |
| Top European Languages on a Map | 0 | - | 4.77 | 131,045 |
| History of Russia Quiz | 0 | - | 4.49 | 31,780 |
| Russia Multiple Choice | 0 | - | 4.58 | 40,552 |
| Countries that Beat Russia | 0 | - | 4.84 | 81,816 |
| Countries Bordering Ukraine, with an Empty Map | 0 | - | 4.86 | 95,856 |
| Famous French People | 0 | - | 4.12 | 27,899 |
| Ancient Greece A-Z | 0 | - | 4.60 | 22,977 |
| The Trojan War | 0 | - | 4.83 | 39,402 |
| Greek Mythology General Knowledge #1 | 0 | - | 4.85 | 110,413 |
| Famous Irish People | 0 | - | 4.05 | 45,852 |
| History of Italy | 0 | - | 4.55 | 31,804 |
| Italy Multiple Choice | 0 | - | 4.74 | 103,114 |
| Ancient Roman Trivia #1 | 0 | - | 4.85 | 84,002 |
| Roman Emperors | 0 | - | 4.95 | 118,352 |
| Geography of the Dutch Empire | 0 | - | 4.62 | 34,470 |
| Famous Nordic People | 0 | - | 4.34 | 19,828 |
| Famous Spaniards Quiz | 0 | - | 4.24 | 11,540 |
| Countries of the Spanish Empire | 0 | - | 4.52 | 76,965 |
| People on Money - England | 0 | - | 4.29 | 16,559 |
| London A-Z | 0 | - | 4.10 | 40,627 |
| Asian Cities A-Z by Clue | 0 | - | 4.53 | 33,744 |
| Asian Countries by First 2 Letters | 0 | - | 4.91 | 276,995 |
| Major non-NATO U.S. Allies | 0 | - | 4.52 | 51,701 |
| Europe Map Quiz | 0 | - | 5.00 | 4,728,651 |
| Europe Geography Quiz #1 | 0 | - | 4.54 | 70,970 |
| Europe Geography Quiz #2 | 0 | - | 4.57 | 71,594 |
| Europe Geography Quiz #4 | 0 | - | 4.57 | 69,918 |
| Europe Geography Quiz #5 | 0 | - | 4.54 | 60,962 |
| Most Mentioned Allies of Russia | 0 | - | 4.49 | 37,780 |
| Most Mentioned Enemies of Russia | 0 | - | 4.69 | 89,523 |
| Capitals of French Regions | 0 | - | 4.45 | 15,980 |
| Regions of France | 0 | - | 4.78 | 119,099 |
| France Immigration by Country | 0 | - | 4.72 | 75,930 |
| German Groups of Things | 0 | - | 4.46 | 38,294 |
| Capitals of German States | 0 | - | 4.74 | 28,799 |
| Chancellors of Germany, 1949–present | 0 | - | 4.60 | 23,084 |
| Germany True or False? | 0 | - | 4.61 | 48,513 |
| Largest Islands of Greece | 0 | - | 4.59 | 47,423 |
| Olympian Gods Quiz | 0 | - | 4.96 | 495,278 |
| Ancient Greek Words | 0 | - | 4.92 | 110,600 |
| Provinces of the Netherlands | 0 | - | 4.80 | 40,742 |
| 100 Greatest Britons Quiz | 0 | - | 4.41 | 48,031 |
| Foods in a Full English Breakfast | 0 | - | 4.46 | 101,891 |
| Name Every Beatles Song | 0 | - | 4.97 | 233,915 |
| Bohemian Rhapsody Lyrics | 0 | - | 4.98 | 290,237 |
| Famous Scottish People | 0 | - | 4.22 | 18,321 |
| Asian Geography By Letter - A | 0 | - | 4.64 | 70,791 |
| Asian Geography by Letter - H | 0 | - | 4.49 | 65,359 |
| Asian Geography By Letter - M | 0 | - | 4.47 | 61,126 |
| Asian Geography by Letter - P | 0 | - | 4.45 | 57,534 |
| Asian Geography by Letter - T | 0 | - | 4.50 | 57,030 |
| Asian Geography By Letter - L | 0 | - | 4.49 | 42,671 |
| Middle East A-Z | 0 | - | 4.47 | 45,754 |
| 100 Most Common English Words | 0 | - | 4.88 | 1,303,932 |
| Africa Map Quiz | 0 | - | 5.00 | 2,103,208 |
| Oceania Map Quiz | 0 | - | 4.98 | 634,751 |
| Australian Capitals | 0 | - | 4.92 | 62,586 |
| Canada A-Z | 0 | - | 4.73 | 32,634 |
| European Physical Geography | 0 | - | 4.26 | 33,368 |
| Albania Country Quiz | 0 | - | 4.54 | 38,618 |
| Geography of Russia | 0 | - | 4.57 | 21,419 |
| Czech Republic Country Quiz | 0 | - | 4.52 | 41,827 |
| Slovakia... or Slovenia? | 0 | - | 4.69 | 41,759 |
| Ukraine Country Quiz | 0 | - | 4.42 | 47,281 |
| Hungary Country Quiz | 0 | - | 4.49 | 42,995 |
| Romania Country Quiz | 0 | - | 4.63 | 53,314 |
| Serbia Country Quiz | 0 | - | 4.44 | 34,750 |
| History of Austria | 0 | - | 4.70 | 17,742 |
| Geography of the French Empire | 0 | - | 4.48 | 26,919 |
| The French Revolution | 0 | - | 4.46 | 23,757 |
| France Multiple Choice | 0 | - | 4.38 | 40,623 |
| History of France | 0 | - | 4.59 | 55,932 |
| Biggest Cities in Germany in 1910 | 0 | - | 4.41 | 23,374 |
| Roman Numeral Decoding Quiz | 0 | - | 4.94 | 433,248 |
| Two Letter Roman Numerals | 0 | - | 4.97 | 55,574 |
| The Vikings! | 0 | - | 4.45 | 28,237 |
| Sweden Immigration by Country | 0 | - | 4.55 | 55,665 |
| The Portuguese Empire | 0 | - | 4.54 | 11,984 |
| American to British Word Translation | 0 | - | 4.06 | 117,023 |
| Languages of the United Kingdom | 0 | - | 4.13 | 40,690 |
| The Thirteen Dwarves in the Hobbit | 0 | - | 4.81 | 28,384 |
| Champions League Top 4 | 0 | - | 4.77 | 133,601 |
| East Asia Map Quiz | 0 | - | 4.99 | 1,438,554 |
| Asia Map Quiz | 0 | - | 4.99 | 906,236 |
| A Quiz About Islam | 0 | - | 4.31 | 48,185 |
| Countries That Don't Recognize Israel | 0 | - | 4.63 | 34,407 |
| Popular Royal Names | 0 | - | 4.27 | 124,444 |
| Queen in the Answers | 0 | - | 4.29 | 52,548 |
| Most Common English Verbs - Extreme | 0 | - | 4.96 | 155,697 |
| Countries of Africa | 0 | - | 5.00 | 2,505,600 |
| Landlocked Countries in Africa | 0 | - | 4.99 | 45,756 |
| African East Coast | 0 | - | 4.96 | 94,966 |
| Western Africa Map Quiz | 0 | - | 4.97 | 72,839 |
| Oceanian Capitals - Map Quiz | 0 | - | 4.95 | 49,739 |
| Australia Map Quiz | 0 | - | 4.94 | 342,308 |
| U.S. Geography by Letter - B | 0 | - | 4.53 | 68,513 |
| U.S. Geography by Letter - S | 0 | - | 4.54 | 52,062 |
| U.S. Federal Holidays | 0 | - | 4.33 | 99,074 |
| United States Map Quiz | 0 | - | 4.98 | 4,140,295 |
| Two Letter U.S. State Abbreviations | 0 | - | 4.19 | 742,885 |
| Mediterranean Countries Quiz | 0 | - | 4.99 | 209,931 |
| Countries with Territorial Claims in Antarctica | 0 | - | 4.94 | 92,165 |
