| European Countries by First 2 Letters | 0 | - | 4.95 | 528,091 |
| Most Guessed Cities in Europe - Not Capitals | 0 | - | 4.82 | 87,151 |
| European Geography By Letter - P #1 | 0 | - | 4.81 | 96,661 |
| European Geography By Letter - B #2 | 0 | - | 4.84 | 76,745 |
| Federal Subjects of Russia | 0 | - | 4.95 | 145,697 |
| Famous Germans | 0 | - | 4.50 | 54,885 |
| Famous Italians by Clue | 0 | - | 4.45 | 88,972 |
| Count to 10 in Europe: Pro | 0 | - | 4.86 | 68,898 |
| Official European Union Languages | 0 | - | 4.97 | 237,820 |
| European Countries in their Native Language | 0 | - | 4.99 | 157,417 |
| Europe by Borders in 30 Seconds | 0 | - | 4.98 | 426,852 |
| Pre-Euro Currencies | 0 | - | 4.44 | 52,523 |
| Famous Russians | 0 | - | 4.16 | 23,785 |
| Europe Geography Decoder | 0 | - | 4.86 | 69,791 |
| Countries that Beat Switzerland | 0 | - | 4.88 | 41,696 |
| History of Russia Quiz | 0 | - | 4.49 | 31,859 |
| Add A Letter - Make a European City | 0 | - | 4.90 | 23,332 |
| Celtic Nations | 0 | - | 4.69 | 46,882 |
| European Geography By Letter - A | 0 | - | 4.61 | 132,737 |
| European Geography By Letter - B #1 | 0 | - | 4.67 | 111,166 |
| European Geography By Letter - C | 0 | - | 4.46 | 112,138 |
| European Geography By Letter - D | 0 | - | 4.50 | 107,026 |
| European Geography By Letter - L | 0 | - | 4.52 | 112,487 |
| European Geography By Letter - M | 0 | - | 4.64 | 129,391 |
| European Geography By Letter - N | 0 | - | 4.44 | 100,063 |
| European Geography By Letter - R | 0 | - | 4.42 | 92,837 |
| European Geography By Letter - V | 0 | - | 4.43 | 92,468 |
| European Geography By Letter - T | 0 | - | 4.41 | 81,659 |
| European Geography By Letter - S #1 | 0 | - | 4.63 | 99,827 |
| Countries of Europe with an Empty Map | 0 | - | 5.00 | 309,547 |
| All First-Level Subdivisions of Europe on a Map | 0 | - | 4.98 | 169,816 |
| Countries with Territory in the Balkans | 0 | - | 4.96 | 88,830 |
| Eastern Europe Map Quiz | 0 | - | 4.91 | 127,588 |
| Slavic Countries | 0 | - | 4.96 | 111,334 |
| Famous Swiss and Austrian People | 0 | - | 4.45 | 14,594 |
| Famous Dutch and Belgian People | 0 | - | 4.56 | 18,006 |
| Germany Multiple Choice | 0 | - | 4.84 | 54,219 |
| States of the German Confederation in 1848 | 0 | - | 4.90 | 31,804 |
| "Big Five" European Soccer Champions Since 2000 | 0 | - | 4.97 | 353,096 |
| U.S. Citizenship Test Questions | 0 | - | 4.83 | 238,949 |
| Catholic Countries in Europe | 0 | - | 4.83 | 94,678 |
| Countries Formerly in Yugoslavia | 0 | - | 4.95 | 124,591 |
| Famous French People | 0 | - | 4.12 | 28,161 |
| States of Germany | 0 | - | 4.96 | 151,343 |
| Germany Immigration by Country | 0 | - | 4.85 | 80,686 |
| Famous Irish People | 0 | - | 4.05 | 45,918 |
| Regions of Italy | 0 | - | 4.92 | 75,320 |
| Netherlands Immigration by Country | 0 | - | 4.93 | 50,956 |
| Famous Nordic People | 0 | - | 4.34 | 20,006 |
| Famous Spaniards Quiz | 0 | - | 4.24 | 11,572 |
| Regions of Spain Quiz | 0 | - | 4.90 | 113,351 |
| Cantons of Switzerland | 0 | - | 4.98 | 50,802 |
| Champions League Winners | 0 | - | 4.92 | 1,001,774 |
| Asian Geography By Letter - B | 0 | - | 4.85 | 66,201 |
| Biggest Countries in Europe in 1700 | 0 | - | 4.73 | 58,329 |
| Geography of Russia | 0 | - | 4.57 | 21,495 |
| Czech Republic Country Quiz | 0 | - | 4.52 | 42,062 |
| United Kingdom A-Z | 0 | - | 4.53 | 87,472 |
| 10 Closest Megacities to London | 0 | - | 4.90 | 17,633 |
| European Geography By Letter - E | 0 | - | 4.23 | 112,469 |
| European Geography By Letter - F | 0 | - | 4.17 | 91,886 |
| European Geography By Letter - H | 0 | - | 4.30 | 95,143 |
| European Geography By Letter - G | 0 | - | 4.27 | 101,762 |
| European Geography By Letter - I | 0 | - | 4.10 | 94,703 |
| European Geography By Letter - K | 0 | - | 4.14 | 69,390 |
| European Geography By Letter - O | 0 | - | 4.28 | 62,108 |
| European Geography by Letter - W | 0 | - | 4.20 | 82,454 |
| European Geography By Letter - S #2 | 0 | - | 4.19 | 50,674 |
| European Geography A-Z | 0 | - | 4.29 | 49,140 |
| Category Elimination - European Geography #1 | 0 | - | 4.98 | 232,097 |
| European Map without 10 Random Countries | 0 | - | 4.97 | 275,914 |
| Croatia Country Quiz | 0 | - | 4.83 | 43,146 |
| Bosnia and Herzegovina Country Quiz | 0 | - | 4.86 | 35,227 |
| Departments of France | 0 | - | 4.93 | 53,464 |
| Countries Surrounding Rome | 0 | - | 4.97 | 49,470 |
| History of The Netherlands | 0 | - | 4.46 | 17,375 |
| Famous Scottish People | 0 | - | 4.22 | 18,366 |
| England or Wales? | 0 | - | 4.94 | 45,523 |
| All UEFA Champions League Teams Ever | 0 | - | 4.85 | 129,419 |
| Famous Australians by Description | 0 | - | 4.23 | 27,813 |
| European Countries with the Fewest Overnight Visitors | 0 | - | 4.78 | 41,636 |
| Word Scramble - European Countries | 0 | - | 4.70 | 141,355 |
| Top 20 Football Clubs in Europe | 0 | - | 4.48 | 114,023 |
| Name a Major European City A-Z | 0 | - | 4.33 | 49,359 |
| 100 Longest Rivers in Europe - with a Map | 0 | - | 4.94 | 65,204 |
| Slavic Languages | 0 | - | 4.68 | 54,199 |
| Non-Bordering Countries Closest to Russia | 0 | - | 4.91 | 82,621 |
| Countries that Border Hungary | 0 | - | 4.98 | 103,990 |
| North Macedonia Country Quiz | 0 | - | 4.81 | 27,752 |
| Moldova Country Quiz | 0 | - | 4.82 | 30,695 |
| French Geography Quiz #1 | 0 | - | 4.89 | 34,669 |
| France A-Z | 0 | - | 4.16 | 38,124 |
| Letters of the Greek Alphabet | 0 | - | 4.97 | 645,151 |
| Name that Greek Letter | 0 | - | 4.93 | 322,763 |
| Capitals of Italian Regions | 0 | - | 4.62 | 36,538 |
| Spanish Immigration by Country | 0 | - | 4.63 | 55,385 |
| Switzerland A-Z | 0 | - | 4.45 | 25,591 |
| Africa A-Z | 0 | - | 4.57 | 46,522 |
| African Countries by First 2 Letters | 0 | - | 4.96 | 267,566 |
| Top European Languages on a Map | 0 | - | 4.77 | 131,685 |
| Word Chain - Russia | 0 | - | 4.33 | 15,729 |
| Russia Multiple Choice | 0 | - | 4.58 | 40,664 |
| Countries Bordering Ukraine, with an Empty Map | 0 | - | 4.86 | 96,180 |
| Ancient Greece A-Z | 0 | - | 4.60 | 23,094 |
| The Trojan War | 0 | - | 4.83 | 39,599 |
| Greek Mythology General Knowledge #1 | 0 | - | 4.85 | 111,301 |
| History of Italy | 0 | - | 4.55 | 31,911 |
| Italy Multiple Choice | 0 | - | 4.73 | 103,530 |
| Ancient Roman Trivia #1 | 0 | - | 4.85 | 84,334 |
| Roman Emperors | 0 | - | 4.95 | 119,434 |
| Geography of the Dutch Empire | 0 | - | 4.61 | 34,587 |
| Countries of the Spanish Empire | 0 | - | 4.52 | 77,117 |
| The British Royal Family - Modern Times | 0 | - | 4.16 | 21,504 |
| People on Money - England | 0 | - | 4.29 | 16,595 |
| English Monarchs in Order by First Letter | 0 | - | 4.38 | 31,556 |
| London A-Z | 0 | - | 4.10 | 40,717 |
| Asian Cities A-Z by Clue | 0 | - | 4.52 | 35,258 |
| Asian Countries by First 2 Letters | 0 | - | 4.91 | 278,353 |
| Famous Chinese People | 0 | - | 4.09 | 11,847 |
| Famous Mexicans and Mexican-Americans | 0 | - | 4.15 | 16,926 |
| Major non-NATO U.S. Allies | 0 | - | 4.52 | 51,996 |
| Europe Map Quiz | 0 | - | 5.00 | 4,749,068 |
| Europe Geography Quiz #1 | 0 | - | 4.55 | 71,161 |
| Europe Geography Quiz #2 | 0 | - | 4.57 | 71,813 |
| Europe Geography Quiz #4 | 0 | - | 4.57 | 70,096 |
| Europe Geography Quiz #5 | 0 | - | 4.55 | 61,138 |
| Most Mentioned Allies of Russia | 0 | - | 4.49 | 37,926 |
| Most Mentioned Enemies of Russia | 0 | - | 4.69 | 89,800 |
| Capitals of French Regions | 0 | - | 4.45 | 16,026 |
| Regions of France | 0 | - | 4.78 | 120,117 |
| France Immigration by Country | 0 | - | 4.70 | 76,281 |
| German Groups of Things | 0 | - | 4.46 | 38,400 |
| Capitals of German States | 0 | - | 4.74 | 28,902 |
| Chancellors of Germany, 1949–present | 0 | - | 4.60 | 23,231 |
| Germany True or False? | 0 | - | 4.61 | 48,679 |
| Largest Islands of Greece | 0 | - | 4.59 | 47,779 |
| Olympian Gods Quiz | 0 | - | 4.96 | 498,830 |
| Ancient Greek Words | 0 | - | 4.93 | 111,190 |
| Provinces of the Netherlands | 0 | - | 4.80 | 41,116 |
| 100 Greatest Britons Quiz | 0 | - | 4.41 | 48,169 |
| Foods in a Full English Breakfast | 0 | - | 4.46 | 102,927 |
| Name Every Beatles Song | 0 | - | 4.97 | 235,239 |
| Bohemian Rhapsody Lyrics | 0 | - | 4.98 | 291,251 |
| Asian Geography By Letter - A | 0 | - | 4.64 | 70,974 |
| Asian Geography by Letter - H | 0 | - | 4.49 | 65,534 |
| Asian Geography By Letter - M | 0 | - | 4.47 | 61,275 |
| Asian Geography by Letter - P | 0 | - | 4.45 | 57,739 |
| Asian Geography by Letter - T | 0 | - | 4.50 | 57,207 |
| Asian Geography By Letter - L | 0 | - | 4.49 | 42,861 |
| Asian Geography By Letter - O | 0 | - | 4.65 | 31,639 |
| Middle East A-Z | 0 | - | 4.47 | 45,936 |
| 100 Most Common English Words | 0 | - | 4.88 | 1,311,576 |
| Africa Map Quiz | 0 | - | 5.00 | 2,111,941 |
| Oceania Map Quiz | 0 | - | 4.98 | 639,181 |
| Australian Capitals | 0 | - | 4.92 | 62,672 |
| Canada A-Z | 0 | - | 4.73 | 32,739 |
| European Physical Geography | 0 | - | 4.26 | 33,439 |
| Russian History A-Z | 0 | - | 4.38 | 31,469 |
| Slovakia... or Slovenia? | 0 | - | 4.69 | 41,876 |
| Ukraine Country Quiz | 0 | - | 4.42 | 47,541 |
| Hungary Country Quiz | 0 | - | 4.49 | 43,264 |
| Romania Country Quiz | 0 | - | 4.63 | 53,626 |
| History of Austria | 0 | - | 4.70 | 17,815 |
| Geography of the French Empire | 0 | - | 4.45 | 27,011 |
| The French Revolution | 0 | - | 4.46 | 23,878 |
| France Multiple Choice | 0 | - | 4.38 | 40,688 |
| History of France | 0 | - | 4.59 | 56,680 |
| Biggest Cities in Germany in 1910 | 0 | - | 4.41 | 23,443 |
| Roman Numeral Decoding Quiz | 0 | - | 4.94 | 435,454 |
| Two Letter Roman Numerals | 0 | - | 4.97 | 55,886 |
| The Vikings! | 0 | - | 4.46 | 28,300 |
| Sweden Immigration by Country | 0 | - | 4.55 | 55,946 |
| The Portuguese Empire | 0 | - | 4.58 | 12,037 |
| American to British Word Translation | 0 | - | 4.13 | 138,480 |
| Languages of the United Kingdom | 0 | - | 4.13 | 40,827 |
| The Thirteen Dwarves in the Hobbit | 0 | - | 4.81 | 28,487 |
| Champions League Top 4 | 0 | - | 4.77 | 135,221 |
| East Asia Map Quiz | 0 | - | 4.99 | 1,444,733 |
| Asia Map Quiz | 0 | - | 4.99 | 911,952 |
| A Quiz About Islam | 0 | - | 4.31 | 48,353 |
| Countries That Don't Recognize Israel | 0 | - | 4.63 | 34,689 |
| Most Common English Verbs - Extreme | 0 | - | 4.96 | 156,550 |
| Countries of Africa | 0 | - | 5.00 | 2,524,294 |
| Landlocked Countries in Africa | 0 | - | 4.99 | 46,380 |
| African East Coast | 0 | - | 4.96 | 95,625 |
| Western Africa Map Quiz | 0 | - | 4.97 | 73,449 |
| Oceanian Capitals - Map Quiz | 0 | - | 4.95 | 50,276 |
| Australia Map Quiz | 0 | - | 4.94 | 343,472 |
| U.S. Geography by Letter - B | 0 | - | 4.53 | 69,010 |
| U.S. Geography by Letter - S | 0 | - | 4.55 | 52,493 |
| U.S. Federal Holidays | 0 | - | 4.33 | 99,388 |
| United States Map Quiz | 0 | - | 4.98 | 4,149,862 |
| Two Letter U.S. State Abbreviations | 0 | - | 4.19 | 745,550 |
| Famous Canadians Quiz | 0 | - | 3.94 | 23,385 |
| Mediterranean Countries Quiz | 0 | - | 4.99 | 211,320 |
| Countries with Territorial Claims in Antarctica | 0 | - | 4.94 | 92,509 |
| Countries That Use the Euro | 0 | - | 4.95 | 104,154 |
| Europe Cities Map Quiz | 0 | - | 4.99 | 363,476 |
| Europe Geography Quiz #3 | 0 | - | 4.35 | 63,554 |
| 10 Easternmost Countries in Europe | 0 | - | 4.89 | 114,487 |
