| European Countries by First 2 Letters | 0 | - | 4.95 | 526,389 |
| Most Guessed Cities in Europe - Not Capitals | 0 | - | 4.82 | 86,859 |
| Countries with the Most Skyscrapers | 0 | - | 4.92 | 143,441 |
| U.S. Cities with the Most Skyscrapers | 0 | - | 4.89 | 95,319 |
| Countries with the Tallest Buildings | 0 | - | 4.93 | 103,750 |
| European Geography By Letter - P #1 | 0 | - | 4.81 | 96,339 |
| European Geography By Letter - B #2 | 0 | - | 4.83 | 76,278 |
| Category Elimination - European Geography #3 | 0 | - | 4.85 | 79,806 |
| Count to 10 in Europe: Pro | 0 | - | 4.85 | 68,585 |
| Official European Union Languages | 0 | - | 4.97 | 236,646 |
| European Countries in their Native Language | 0 | - | 4.99 | 156,709 |
| Europe by Borders in 30 Seconds | 0 | - | 4.98 | 425,236 |
| Pre-Euro Currencies | 0 | - | 4.44 | 52,451 |
| Europe Geography Decoder | 0 | - | 4.86 | 69,544 |
| Countries that Beat Switzerland | 0 | - | 4.88 | 41,570 |
| Tall Building Cities - United States | 0 | - | 4.48 | 68,261 |
| Add A Letter - Make a European City | 0 | - | 4.90 | 23,242 |
| Celtic Nations | 0 | - | 4.69 | 46,812 |
| Countries of Europe with an Empty Map | 0 | - | 5.00 | 307,867 |
| All First-Level Subdivisions of Europe on a Map | 0 | - | 4.98 | 167,953 |
| Germany Multiple Choice | 0 | - | 4.84 | 54,050 |
| "Big Five" European Soccer Champions Since 2000 | 0 | - | 4.97 | 349,984 |
| European Geography By Letter - A | 0 | - | 4.56 | 132,420 |
| European Geography By Letter - B #1 | 0 | - | 4.67 | 110,921 |
| European Geography By Letter - C | 0 | - | 4.46 | 111,869 |
| European Geography By Letter - D | 0 | - | 4.50 | 106,726 |
| European Geography By Letter - L | 0 | - | 4.52 | 112,229 |
| European Geography By Letter - M | 0 | - | 4.61 | 128,912 |
| European Geography By Letter - N | 0 | - | 4.44 | 99,681 |
| European Geography By Letter - R | 0 | - | 4.42 | 92,638 |
| European Geography By Letter - V | 0 | - | 4.43 | 92,030 |
| European Geography By Letter - T | 0 | - | 4.41 | 81,320 |
| European Geography By Letter - S #1 | 0 | - | 4.63 | 99,608 |
| Famous Germans | 0 | - | 4.50 | 54,622 |
| Famous Italians by Clue | 0 | - | 4.45 | 88,536 |
| U.S. Citizenship Test Questions | 0 | - | 4.83 | 238,347 |
| Catholic Countries in Europe | 0 | - | 4.83 | 94,228 |
| Biggest Countries in Europe in 1700 | 0 | - | 4.73 | 58,152 |
| Federal Subjects of Russia | 0 | - | 4.94 | 144,023 |
| States of Germany | 0 | - | 4.96 | 150,093 |
| Germany Immigration by Country | 0 | - | 4.84 | 80,026 |
| States of the German Confederation in 1848 | 0 | - | 4.89 | 31,527 |
| Regions of Italy | 0 | - | 4.92 | 74,736 |
| Netherlands Immigration by Country | 0 | - | 4.94 | 43,824 |
| Regions of Spain Quiz | 0 | - | 4.90 | 112,365 |
| Cantons of Switzerland | 0 | - | 4.98 | 50,201 |
| United Kingdom A-Z | 0 | - | 4.53 | 87,227 |
| 10 Closest Megacities to London | 0 | - | 4.90 | 17,435 |
| Champions League Winners | 0 | - | 4.92 | 996,475 |
| Asian Geography By Letter - B | 0 | - | 4.85 | 66,004 |
| Cities with the Tallest Buildings | 0 | - | 4.17 | 84,339 |
| Category Elimination - European Geography #1 | 0 | - | 4.98 | 230,576 |
| European Map without 10 Random Countries | 0 | - | 4.97 | 274,237 |
| Category Elimination - European Geography #2 | 0 | - | 4.99 | 165,192 |
| Departments of France | 0 | - | 4.93 | 52,842 |
| Countries Surrounding Rome | 0 | - | 4.97 | 49,372 |
| England or Wales? | 0 | - | 4.94 | 45,322 |
| All UEFA Champions League Teams Ever | 0 | - | 4.85 | 128,510 |
| European Geography By Letter - E | 0 | - | 4.23 | 112,229 |
| European Geography By Letter - F | 0 | - | 4.17 | 91,675 |
| European Geography By Letter - H | 0 | - | 4.30 | 94,914 |
| European Geography By Letter - G | 0 | - | 4.25 | 101,290 |
| European Geography By Letter - I | 0 | - | 4.10 | 94,502 |
| European Geography By Letter - K | 0 | - | 4.14 | 69,179 |
| European Geography By Letter - O | 0 | - | 4.28 | 61,928 |
| European Geography by Letter - W | 0 | - | 4.20 | 82,301 |
| European Geography By Letter - S #2 | 0 | - | 4.19 | 50,519 |
| European Geography A-Z | 0 | - | 4.28 | 49,007 |
| European Countries with the Fewest Overnight Visitors | 0 | - | 4.78 | 41,599 |
| Word Scramble - European Countries | 0 | - | 4.70 | 140,999 |
| Top 20 Football Clubs in Europe | 0 | - | 4.48 | 113,065 |
| Slavic Languages | 0 | - | 4.67 | 53,987 |
| Capitals of Italian Regions | 0 | - | 4.62 | 36,430 |
| The Mafia Quiz | 0 | - | 4.46 | 23,207 |
| History of The Netherlands | 0 | - | 4.46 | 17,311 |
| Spanish Immigration by Country | 0 | - | 4.63 | 55,251 |
| Name a Major European City A-Z | 0 | - | 4.33 | 49,133 |
| 100 Longest Rivers in Europe - with a Map | 0 | - | 4.94 | 64,846 |
| French Geography Quiz #1 | 0 | - | 4.89 | 34,519 |
| Famous Swiss and Austrian People | 0 | - | 4.45 | 14,556 |
| Famous Dutch and Belgian People | 0 | - | 4.56 | 17,962 |
| France A-Z | 0 | - | 4.16 | 38,062 |
| Letters of the Greek Alphabet | 0 | - | 4.97 | 641,995 |
| Name that Greek Letter | 0 | - | 4.94 | 321,701 |
| Switzerland A-Z | 0 | - | 4.45 | 25,509 |
| Africa A-Z | 0 | - | 4.57 | 46,373 |
| African Countries by First 2 Letters | 0 | - | 4.96 | 266,549 |
| Top European Languages on a Map | 0 | - | 4.77 | 131,144 |
| Famous Russians | 0 | - | 4.16 | 23,728 |
| History of Russia Quiz | 0 | - | 4.49 | 31,795 |
| Russia Multiple Choice | 0 | - | 4.58 | 40,568 |
| Famous French People | 0 | - | 4.12 | 27,955 |
| Ancient Greece A-Z | 0 | - | 4.60 | 22,984 |
| The Trojan War | 0 | - | 4.83 | 39,434 |
| Greek Mythology General Knowledge #1 | 0 | - | 4.85 | 110,546 |
| Famous Irish People | 0 | - | 4.05 | 45,855 |
| History of Italy | 0 | - | 4.55 | 31,817 |
| Italy Multiple Choice | 0 | - | 4.74 | 103,170 |
| Ancient Roman Trivia #1 | 0 | - | 4.85 | 84,056 |
| Roman Emperors | 0 | - | 4.95 | 118,498 |
| Geography of the Dutch Empire | 0 | - | 4.62 | 34,483 |
| Famous Nordic People | 0 | - | 4.34 | 19,862 |
| Famous Spaniards Quiz | 0 | - | 4.24 | 11,545 |
| Countries of the Spanish Empire | 0 | - | 4.52 | 76,983 |
| The British Royal Family - Modern Times | 0 | - | 4.16 | 21,464 |
| People on Money - England | 0 | - | 4.29 | 16,564 |
| English Monarchs in Order by First Letter | 0 | - | 4.38 | 31,335 |
| London A-Z | 0 | - | 4.10 | 40,638 |
| Asian Cities A-Z by Clue | 0 | - | 4.51 | 34,274 |
| Asian Countries by First 2 Letters | 0 | - | 4.91 | 277,120 |
| Countries with the Most Skyscrapers per Capita | 0 | - | 4.69 | 72,161 |
| 100 Most Common English Words | 0 | - | 4.88 | 1,305,049 |
| Australian Capitals | 0 | - | 4.92 | 62,594 |
| Major non-NATO U.S. Allies | 0 | - | 4.52 | 51,752 |
| Europe Map Quiz | 0 | - | 5.00 | 4,731,741 |
| Europe Geography Quiz #1 | 0 | - | 4.54 | 70,994 |
| Europe Geography Quiz #2 | 0 | - | 4.57 | 71,621 |
| Europe Geography Quiz #4 | 0 | - | 4.57 | 69,948 |
| Europe Geography Quiz #5 | 0 | - | 4.54 | 60,988 |
| Four Letter European Geography #1 | 0 | - | 4.44 | 27,159 |
| Capitals of French Regions | 0 | - | 4.45 | 15,988 |
| Regions of France | 0 | - | 4.78 | 119,279 |
| France Immigration by Country | 0 | - | 4.72 | 75,969 |
| German Groups of Things | 0 | - | 4.46 | 38,306 |
| Capitals of German States | 0 | - | 4.74 | 28,812 |
| Chancellors of Germany, 1949–present | 0 | - | 4.60 | 23,100 |
| Germany True or False? | 0 | - | 4.61 | 48,536 |
| Largest Islands of Greece | 0 | - | 4.59 | 47,469 |
| Olympian Gods Quiz | 0 | - | 4.96 | 496,242 |
| Ancient Greek Words | 0 | - | 4.92 | 110,711 |
| Provinces of the Netherlands | 0 | - | 4.80 | 40,831 |
| 100 Greatest Britons Quiz | 0 | - | 4.41 | 48,051 |
| Foods in a Full English Breakfast | 0 | - | 4.46 | 101,969 |
| Name Every Beatles Song | 0 | - | 4.97 | 234,130 |
| Bohemian Rhapsody Lyrics | 0 | - | 4.98 | 290,355 |
| Famous Scottish People | 0 | - | 4.22 | 18,326 |
| Asian Geography By Letter - A | 0 | - | 4.64 | 70,833 |
| Asian Geography by Letter - H | 0 | - | 4.49 | 65,397 |
| Asian Geography By Letter - M | 0 | - | 4.47 | 61,167 |
| Asian Geography by Letter - P | 0 | - | 4.45 | 57,569 |
| Asian Geography by Letter - T | 0 | - | 4.50 | 57,080 |
| Asian Geography By Letter - L | 0 | - | 4.49 | 42,719 |
| Middle East A-Z | 0 | - | 4.47 | 45,790 |
| Most Common English Verbs - Extreme | 0 | - | 4.96 | 155,818 |
| Africa Map Quiz | 0 | - | 5.00 | 2,104,486 |
| Oceania Map Quiz | 0 | - | 4.98 | 635,378 |
| Canada A-Z | 0 | - | 4.73 | 32,652 |
| European Physical Geography | 0 | - | 4.26 | 33,375 |
| Geography of Russia | 0 | - | 4.57 | 21,428 |
| Russian History A-Z | 0 | - | 4.38 | 30,853 |
| Slovakia... or Slovenia? | 0 | - | 4.69 | 41,779 |
| History of Austria | 0 | - | 4.70 | 17,753 |
| Geography of the French Empire | 0 | - | 4.48 | 26,936 |
| The French Revolution | 0 | - | 4.46 | 23,785 |
| France Multiple Choice | 0 | - | 4.38 | 40,635 |
| History of France | 0 | - | 4.59 | 56,066 |
| Biggest Cities in Germany in 1910 | 0 | - | 4.41 | 23,385 |
| Roman Numeral Decoding Quiz | 0 | - | 4.94 | 433,592 |
| Two Letter Roman Numerals | 0 | - | 4.97 | 55,622 |
| The Vikings! | 0 | - | 4.46 | 28,246 |
| Sweden Immigration by Country | 0 | - | 4.55 | 55,704 |
| The Portuguese Empire | 0 | - | 4.54 | 11,992 |
| American to British Word Translation | 0 | - | 4.06 | 120,854 |
| Languages of the United Kingdom | 0 | - | 4.13 | 40,708 |
| The Thirteen Dwarves in the Hobbit | 0 | - | 4.81 | 28,395 |
| Champions League Top 4 | 0 | - | 4.77 | 133,837 |
| East Asia Map Quiz | 0 | - | 4.99 | 1,440,553 |
| Asia Map Quiz | 0 | - | 4.99 | 907,127 |
| A Quiz About Islam | 0 | - | 4.31 | 48,209 |
| Countries That Don't Recognize Israel | 0 | - | 4.63 | 34,450 |
| Countries of Africa | 0 | - | 5.00 | 2,508,204 |
| Landlocked Countries in Africa | 0 | - | 4.99 | 45,824 |
| African East Coast | 0 | - | 4.96 | 95,060 |
| Western Africa Map Quiz | 0 | - | 4.97 | 72,939 |
| Oceanian Capitals - Map Quiz | 0 | - | 4.95 | 49,809 |
| Australia Map Quiz | 0 | - | 4.94 | 342,514 |
| U.S. Geography by Letter - B | 0 | - | 4.53 | 68,540 |
| U.S. Geography by Letter - S | 0 | - | 4.54 | 52,080 |
| U.S. Federal Holidays | 0 | - | 4.33 | 99,101 |
| United States Map Quiz | 0 | - | 4.98 | 4,142,042 |
| Two Letter U.S. State Abbreviations | 0 | - | 4.19 | 743,234 |
| Mediterranean Countries Quiz | 0 | - | 4.99 | 210,168 |
| Countries with Territorial Claims in Antarctica | 0 | - | 4.94 | 92,214 |
| Countries That Use the Euro | 0 | - | 4.96 | 103,023 |
| Europe Cities Map Quiz | 0 | - | 4.99 | 362,329 |
| Europe Geography Quiz #3 | 0 | - | 4.34 | 63,401 |
| 10 Easternmost Countries in Europe | 0 | - | 4.89 | 113,586 |
| Country Codes of Europe | 0 | - | 3.46 | 13,654 |
| The Only European Country ... | 0 | - | 4.91 | 213,882 |
| European Countries NOT in NATO | 0 | - | 4.87 | 59,562 |
| Austria... or Australia? | 0 | - | 4.68 | 103,876 |
| Presidents of France | 0 | - | 4.25 | 23,905 |
| Word Chain - France | 0 | - | 4.38 | 42,584 |
| Ancient Greek Trivia | 0 | - | 4.62 | 66,780 |
| Geography of Ancient Greece | 0 | - | 4.69 | 31,772 |
| Figures from Greek Mythology | 0 | - | 4.91 | 184,979 |
| Italian Foods | 0 | - | 4.31 | 72,207 |
| Countries Italy Declared War On | 0 | - | 4.75 | 42,961 |
| Kings of Spain Quiz | 0 | - | 4.14 | 13,960 |
| Canary Islands | 0 | - | 4.61 | 17,404 |
