| European Countries by First 2 Letters | 0 | - | 4.95 | 530,330 |
| Most Guessed Cities in Europe - Not Capitals | 0 | - | 4.82 | 87,499 |
| European Geography By Letter - B #2 | 0 | - | 4.84 | 82,234 |
| Federal Subjects of Russia | 0 | - | 4.95 | 147,868 |
| Famous Germans | 0 | - | 4.50 | 55,485 |
| Famous Italians by Clue | 0 | - | 4.45 | 89,712 |
| Count to 10 in Europe: Pro | 0 | - | 4.86 | 69,285 |
| Official European Union Languages | 0 | - | 4.97 | 238,829 |
| European Countries in their Native Language | 0 | - | 4.99 | 158,070 |
| Europe by Borders in 30 Seconds | 0 | - | 4.98 | 428,807 |
| Pre-Euro Currencies | 0 | - | 4.44 | 52,634 |
| Famous Russians | 0 | - | 4.16 | 23,858 |
| Europe Geography Decoder | 0 | - | 4.86 | 70,080 |
| Famous French People | 0 | - | 4.07 | 35,800 |
| Countries that Beat Switzerland | 0 | - | 4.88 | 41,895 |
| History of Russia Quiz | 0 | - | 4.47 | 31,943 |
| Add A Letter - Make a European City | 0 | - | 4.90 | 23,414 |
| Celtic Nations | 0 | - | 4.69 | 46,978 |
| European Geography By Letter - A | 0 | - | 4.52 | 146,670 |
| European Geography By Letter - B #1 | 0 | - | 4.67 | 120,095 |
| European Geography By Letter - C | 0 | - | 4.46 | 114,394 |
| European Geography By Letter - D | 0 | - | 4.50 | 108,985 |
| European Geography By Letter - L | 0 | - | 4.52 | 113,779 |
| European Geography By Letter - M | 0 | - | 4.67 | 131,020 |
| European Geography By Letter - P #1 | 0 | - | 4.80 | 97,743 |
| European Geography By Letter - N | 0 | - | 4.44 | 101,042 |
| European Geography By Letter - R | 0 | - | 4.42 | 93,864 |
| European Geography By Letter - V | 0 | - | 4.42 | 93,155 |
| European Geography By Letter - T | 0 | - | 4.41 | 82,648 |
| European Geography By Letter - S #1 | 0 | - | 4.62 | 100,754 |
| Countries of Europe with an Empty Map | 0 | - | 5.00 | 311,103 |
| All First-Level Subdivisions of Europe on a Map | 0 | - | 4.98 | 172,657 |
| Countries with Territory in the Balkans | 0 | - | 4.96 | 89,503 |
| Eastern Europe Map Quiz | 0 | - | 4.91 | 128,349 |
| Slavic Countries | 0 | - | 4.96 | 111,830 |
| Famous Swiss and Austrian People | 0 | - | 4.45 | 14,639 |
| Famous Dutch and Belgian People | 0 | - | 4.56 | 18,082 |
| Germany Multiple Choice | 0 | - | 4.84 | 54,442 |
| States of the German Confederation in 1848 | 0 | - | 4.89 | 32,155 |
| "Big Five" European Soccer Champions Since 2000 | 0 | - | 4.97 | 357,754 |
| U.S. Citizenship Test Questions | 0 | - | 4.83 | 239,685 |
| Catholic Countries in Europe | 0 | - | 4.83 | 95,329 |
| Countries Formerly in Yugoslavia | 0 | - | 4.95 | 125,043 |
| States of Germany | 0 | - | 4.95 | 153,035 |
| Germany Immigration by Country | 0 | - | 4.85 | 81,230 |
| Famous Irish People | 0 | - | 4.05 | 46,018 |
| Regions of Italy | 0 | - | 4.92 | 76,173 |
| Netherlands Immigration by Country | 0 | - | 4.93 | 52,375 |
| Famous Nordic People | 0 | - | 4.34 | 20,158 |
| Famous Spaniards Quiz | 0 | - | 4.24 | 11,621 |
| Regions of Spain Quiz | 0 | - | 4.90 | 114,266 |
| Cantons of Switzerland | 0 | - | 4.98 | 51,373 |
| Champions League Winners | 0 | - | 4.91 | 1,009,232 |
| Asian Geography By Letter - B | 0 | - | 4.85 | 66,635 |
| Biggest Countries in Europe in 1700 | 0 | - | 4.73 | 58,553 |
| Geography of Russia | 0 | - | 4.57 | 21,551 |
| Czech Republic Country Quiz | 0 | - | 4.52 | 42,269 |
| United Kingdom A-Z | 0 | - | 4.52 | 88,124 |
| 10 Closest Megacities to London | 0 | - | 4.90 | 17,734 |
| European Geography By Letter - E | 0 | - | 4.23 | 114,032 |
| European Geography By Letter - F | 0 | - | 4.17 | 93,408 |
| European Geography By Letter - H | 0 | - | 4.30 | 96,274 |
| European Geography By Letter - G | 0 | - | 4.27 | 102,953 |
| European Geography By Letter - I | 0 | - | 4.10 | 95,726 |
| European Geography By Letter - K | 0 | - | 4.14 | 70,370 |
| European Geography By Letter - O | 0 | - | 4.28 | 62,880 |
| European Geography by Letter - W | 0 | - | 4.20 | 83,039 |
| European Geography By Letter - S #2 | 0 | - | 4.19 | 51,317 |
| European Geography A-Z | 0 | - | 4.29 | 49,348 |
| Category Elimination - European Geography #1 | 0 | - | 4.98 | 233,770 |
| European Map without 10 Random Countries | 0 | - | 4.97 | 277,252 |
| Category Elimination - European Geography #2 | 0 | - | 4.99 | 167,502 |
| Croatia Country Quiz | 0 | - | 4.83 | 43,442 |
| Bosnia and Herzegovina Country Quiz | 0 | - | 4.86 | 35,401 |
| Departments of France | 0 | - | 4.93 | 54,390 |
| Countries Surrounding Rome | 0 | - | 4.97 | 49,599 |
| History of The Netherlands | 0 | - | 4.46 | 17,469 |
| English Monarchs in Order by First Letter | 0 | - | 4.38 | 31,916 |
| Famous Scottish People | 0 | - | 4.22 | 18,409 |
| England or Wales? | 0 | - | 4.94 | 45,775 |
| All UEFA Champions League Teams Ever | 0 | - | 4.85 | 130,883 |
| Famous Australians by Description | 0 | - | 4.23 | 27,991 |
| European Countries with the Fewest Overnight Visitors | 0 | - | 4.80 | 41,669 |
| Word Scramble - European Countries | 0 | - | 4.73 | 141,830 |
| Top 20 Football Clubs in Europe | 0 | - | 4.48 | 115,475 |
| Name a Major European City A-Z | 0 | - | 4.33 | 49,625 |
| 100 Longest Rivers in Europe - with a Map | 0 | - | 4.94 | 65,586 |
| Slavic Languages | 0 | - | 4.68 | 54,443 |
| Non-Bordering Countries Closest to Russia | 0 | - | 4.91 | 82,948 |
| Countries that Border Hungary | 0 | - | 4.98 | 104,381 |
| North Macedonia Country Quiz | 0 | - | 4.81 | 27,917 |
| Moldova Country Quiz | 0 | - | 4.82 | 30,869 |
| French Geography Quiz #1 | 0 | - | 4.89 | 34,839 |
| France A-Z | 0 | - | 4.16 | 38,252 |
| Letters of the Greek Alphabet | 0 | - | 4.97 | 648,536 |
| Name that Greek Letter | 0 | - | 4.93 | 324,091 |
| Capitals of Italian Regions | 0 | - | 4.62 | 36,652 |
| Spanish Immigration by Country | 0 | - | 4.63 | 55,507 |
| Switzerland A-Z | 0 | - | 4.45 | 25,678 |
| Africa A-Z | 0 | - | 4.57 | 46,662 |
| African Countries by First 2 Letters | 0 | - | 4.96 | 268,519 |
| Top European Languages on a Map | 0 | - | 4.77 | 132,278 |
| Word Chain - Russia | 0 | - | 4.33 | 15,770 |
| Russia Multiple Choice | 0 | - | 4.58 | 40,767 |
| Russian History A-Z | 0 | - | 4.35 | 31,825 |
| Countries Bordering Ukraine, with an Empty Map | 0 | - | 4.86 | 96,513 |
| Ancient Greece A-Z | 0 | - | 4.60 | 23,164 |
| The Trojan War | 0 | - | 4.83 | 39,782 |
| Greek Mythology General Knowledge #1 | 0 | - | 4.85 | 112,125 |
| History of Italy | 0 | - | 4.55 | 32,040 |
| Italy Multiple Choice | 0 | - | 4.74 | 103,913 |
| Ancient Roman Trivia #1 | 0 | - | 4.85 | 84,627 |
| Roman Emperors | 0 | - | 4.95 | 120,317 |
| Geography of the Dutch Empire | 0 | - | 4.62 | 34,714 |
| Countries of the Spanish Empire | 0 | - | 4.52 | 77,287 |
| The British Royal Family - Modern Times | 0 | - | 4.16 | 21,539 |
| People on Money - England | 0 | - | 4.29 | 16,622 |
| London A-Z | 0 | - | 4.10 | 40,804 |
| Asian Cities A-Z by Clue | 0 | - | 4.51 | 41,745 |
| Asian Countries by First 2 Letters | 0 | - | 4.91 | 279,538 |
| Famous Chinese People | 0 | - | 4.09 | 11,886 |
| Famous Mexicans and Mexican-Americans | 0 | - | 4.15 | 16,951 |
| Major non-NATO U.S. Allies | 0 | - | 4.52 | 52,268 |
| Europe Map Quiz | 0 | - | 5.00 | 4,769,069 |
| Europe Geography Quiz #1 | 0 | - | 4.55 | 71,338 |
| Europe Geography Quiz #2 | 0 | - | 4.57 | 71,998 |
| Europe Geography Quiz #4 | 0 | - | 4.57 | 70,283 |
| Europe Geography Quiz #5 | 0 | - | 4.55 | 61,281 |
| Most Mentioned Allies of Russia | 0 | - | 4.49 | 38,066 |
| Most Mentioned Enemies of Russia | 0 | - | 4.69 | 90,101 |
| Capitals of French Regions | 0 | - | 4.45 | 16,096 |
| Regions of France | 0 | - | 4.72 | 121,131 |
| France Immigration by Country | 0 | - | 4.70 | 76,648 |
| German Groups of Things | 0 | - | 4.46 | 38,508 |
| Capitals of German States | 0 | - | 4.74 | 28,979 |
| Chancellors of Germany, 1949–present | 0 | - | 4.60 | 23,384 |
| Germany True or False? | 0 | - | 4.61 | 48,866 |
| Largest Islands of Greece | 0 | - | 4.59 | 48,124 |
| Olympian Gods Quiz | 0 | - | 4.96 | 501,648 |
| Ancient Greek Words | 0 | - | 4.93 | 111,838 |
| Provinces of the Netherlands | 0 | - | 4.80 | 41,468 |
| 100 Greatest Britons Quiz | 0 | - | 4.41 | 48,327 |
| Foods in a Full English Breakfast | 0 | - | 4.46 | 103,392 |
| Name Every Beatles Song | 0 | - | 4.97 | 236,809 |
| Bohemian Rhapsody Lyrics | 0 | - | 4.98 | 291,983 |
| Asian Geography By Letter - A | 0 | - | 4.64 | 71,222 |
| Asian Geography by Letter - H | 0 | - | 4.50 | 65,798 |
| Asian Geography By Letter - M | 0 | - | 4.47 | 61,474 |
| Asian Geography by Letter - P | 0 | - | 4.45 | 57,985 |
| Asian Geography by Letter - T | 0 | - | 4.51 | 57,432 |
| Asian Geography By Letter - L | 0 | - | 4.49 | 43,104 |
| Asian Geography By Letter - O | 0 | - | 4.65 | 31,987 |
| Middle East A-Z | 0 | - | 4.47 | 46,123 |
| 100 Most Common English Words | 0 | - | 4.88 | 1,319,081 |
| Africa Map Quiz | 0 | - | 5.00 | 2,120,913 |
| Oceania Map Quiz | 0 | - | 4.98 | 643,559 |
| Australian Capitals | 0 | - | 4.92 | 62,742 |
| Canada A-Z | 0 | - | 4.73 | 32,879 |
| European Physical Geography | 0 | - | 4.26 | 33,536 |
| Slovakia... or Slovenia? | 0 | - | 4.69 | 41,999 |
| Ukraine Country Quiz | 0 | - | 4.43 | 47,784 |
| Hungary Country Quiz | 0 | - | 4.49 | 43,522 |
| Romania Country Quiz | 0 | - | 4.63 | 53,874 |
| History of Austria | 0 | - | 4.70 | 17,894 |
| Geography of the French Empire | 0 | - | 4.45 | 27,149 |
| The French Revolution | 0 | - | 4.47 | 24,050 |
| France Multiple Choice | 0 | - | 4.39 | 40,763 |
| History of France | 0 | - | 4.59 | 57,228 |
| Roman Numeral Decoding Quiz | 0 | - | 4.94 | 437,754 |
| Two Letter Roman Numerals | 0 | - | 4.97 | 56,239 |
| The Vikings! | 0 | - | 4.46 | 28,366 |
| Sweden Immigration by Country | 0 | - | 4.55 | 56,197 |
| The Portuguese Empire | 0 | - | 4.58 | 12,081 |
| American to British Word Translation | 0 | - | 4.14 | 139,255 |
| Languages of the United Kingdom | 0 | - | 4.13 | 40,940 |
| The Thirteen Dwarves in the Hobbit | 0 | - | 4.81 | 28,703 |
| Champions League Top 4 | 0 | - | 4.77 | 137,126 |
| East Asia Map Quiz | 0 | - | 4.99 | 1,449,372 |
| Asia Map Quiz | 0 | - | 4.99 | 918,910 |
| A Quiz About Islam | 0 | - | 4.31 | 48,488 |
| Countries That Don't Recognize Israel | 0 | - | 4.68 | 34,920 |
| Most Common English Verbs - Extreme | 0 | - | 4.96 | 157,537 |
| Countries of Africa | 0 | - | 5.00 | 2,543,113 |
| Landlocked Countries in Africa | 0 | - | 4.99 | 47,045 |
| African East Coast | 0 | - | 4.96 | 96,225 |
| Western Africa Map Quiz | 0 | - | 4.97 | 74,085 |
| Oceanian Capitals - Map Quiz | 0 | - | 4.95 | 50,844 |
| Australia Map Quiz | 0 | - | 4.95 | 344,975 |
| U.S. Geography by Letter - B | 0 | - | 4.53 | 69,490 |
| U.S. Geography by Letter - S | 0 | - | 4.55 | 52,921 |
| U.S. Federal Holidays | 0 | - | 4.33 | 99,505 |
| United States Map Quiz | 0 | - | 4.98 | 4,162,509 |
| Two Letter U.S. State Abbreviations | 0 | - | 4.19 | 747,807 |
| Famous Canadians Quiz | 0 | - | 3.94 | 23,415 |
| Mediterranean Countries Quiz | 0 | - | 4.99 | 212,691 |
| Countries with Territorial Claims in Antarctica | 0 | - | 4.94 | 92,722 |
| Countries That Use the Euro | 0 | - | 4.95 | 105,444 |
| Europe Cities Map Quiz | 0 | - | 4.99 | 364,913 |
| Europe Geography Quiz #3 | 0 | - | 4.35 | 63,731 |
| 10 Easternmost Countries in Europe | 0 | - | 4.89 | 115,599 |
