| States of the German Confederation in 1848 | 0 | - | 4.90 | 32,327 |
| States of Germany | 0 | - | 4.95 | 153,918 |
| Germany Immigration by Country | 0 | - | 4.86 | 81,507 |
| European Countries by First 2 Letters | 0 | - | 4.95 | 531,635 |
| Germany Multiple Choice | 0 | - | 4.84 | 54,603 |
| Save Europeans by Guessing Countries | 0 | - | 4.86 | 215,821 |
| States of Germany Map Quiz | 0 | - | 4.92 | 133,497 |
| Regions of Italy | 0 | - | 4.92 | 76,640 |
| Netherlands Immigration by Country | 0 | - | 4.93 | 52,635 |
| Regions of Spain Quiz | 0 | - | 4.90 | 114,971 |
| Cantons of Switzerland | 0 | - | 4.98 | 51,583 |
| 10 Closest Megacities to London | 0 | - | 4.90 | 17,803 |
| Count to 10 in Europe: Pro | 0 | - | 4.86 | 69,547 |
| Official European Union Languages | 0 | - | 4.97 | 239,392 |
| European Countries in their Native Language | 0 | - | 4.99 | 158,415 |
| Europe by Borders in 30 Seconds | 0 | - | 4.98 | 430,101 |
| Biggest Cities in Germany in 1910 | 0 | - | 4.41 | 23,539 |
| Europe Geography Decoder | 0 | - | 4.86 | 70,210 |
| Countries that Beat Switzerland | 0 | - | 4.88 | 41,989 |
| History of Italy | 0 | - | 4.55 | 32,105 |
| Italy Multiple Choice | 0 | - | 4.74 | 104,173 |
| Geography of the Dutch Empire | 0 | - | 4.62 | 34,775 |
| Countries of the Spanish Empire | 0 | - | 4.52 | 77,373 |
| Add A Letter - Make a European City | 0 | - | 4.90 | 23,466 |
| Celtic Nations | 0 | - | 4.61 | 47,058 |
| Most Guessed Cities in Europe - Not Capitals | 0 | - | 4.82 | 87,867 |
| Countries of Europe with an Empty Map | 0 | - | 5.00 | 312,118 |
| All First-Level Subdivisions of Europe on a Map | 0 | - | 4.99 | 174,783 |
| Geography of Germany | 0 | - | 4.35 | 17,242 |
| History of Germany | 0 | - | 4.39 | 52,939 |
| Counties of England | 0 | - | 4.97 | 801,041 |
| "Big Five" European Soccer Champions Since 2000 | 0 | - | 4.97 | 359,933 |
| Regions of France | 0 | - | 4.70 | 121,699 |
| France Immigration by Country | 0 | - | 4.70 | 76,821 |
| Famous Germans | 0 | - | 4.50 | 55,650 |
| German Groups of Things | 0 | - | 4.47 | 38,586 |
| Germany True or False? | 0 | - | 4.61 | 48,957 |
| Largest Islands of Greece | 0 | - | 4.59 | 48,308 |
| Famous Italians by Clue | 0 | - | 4.45 | 90,041 |
| Provinces of the Netherlands | 0 | - | 4.80 | 41,619 |
| 100 Greatest Britons Quiz | 0 | - | 4.41 | 48,377 |
| Foods in a Full English Breakfast | 0 | - | 4.46 | 103,628 |
| Name Every Beatles Song | 0 | - | 4.97 | 237,792 |
| Bohemian Rhapsody Lyrics | 0 | - | 4.98 | 292,533 |
| European Geography By Letter - P #1 | 0 | - | 4.81 | 98,530 |
| Catholic Countries in Europe | 0 | - | 4.83 | 95,587 |
| Biggest Countries in Europe in 1700 | 0 | - | 4.73 | 58,681 |
| European Geography By Letter - B #2 | 0 | - | 4.87 | 88,210 |
| Category Elimination - European Geography #3 | 0 | - | 4.86 | 81,672 |
| Federal Subjects of Russia | 0 | - | 4.95 | 148,797 |
| History of Austria | 0 | - | 4.70 | 17,949 |
| Regions of France Map Quiz | 0 | - | 4.97 | 145,325 |
| Geography of the French Empire | 0 | - | 4.45 | 27,193 |
| The French Revolution | 0 | - | 4.47 | 24,108 |
| France Multiple Choice | 0 | - | 4.39 | 40,808 |
| History of France | 0 | - | 4.61 | 57,452 |
| The Vikings! | 0 | - | 4.46 | 28,388 |
| The Portuguese Empire | 0 | - | 4.58 | 12,094 |
| American to British Word Translation | 0 | - | 4.14 | 139,524 |
| Languages of the United Kingdom | 0 | - | 4.14 | 41,014 |
| Countries and Territories of the United Kingdom | 0 | - | 4.90 | 94,353 |
| Counties of England Map Quiz | 0 | - | 4.97 | 308,637 |
| Champions League Winners | 0 | - | 4.92 | 1,012,755 |
| Category Elimination - European Geography #1 | 0 | - | 4.98 | 235,039 |
| European Map without 10 Random Countries | 0 | - | 4.97 | 278,155 |
| Category Elimination - European Geography #2 | 0 | - | 4.99 | 168,356 |
| Departments of France | 0 | - | 4.93 | 54,831 |
| Germany Country Quiz | 0 | - | 4.83 | 158,545 |
| Countries Bordering Germany | 0 | - | 4.99 | 371,282 |
| Countries Surrounding Rome | 0 | - | 4.97 | 49,694 |
| England or Wales? | 0 | - | 4.94 | 45,885 |
| All UEFA Champions League Teams Ever | 0 | - | 4.85 | 131,569 |
| Pre-Euro Currencies | 0 | - | 4.44 | 52,699 |
| European Countries with the Fewest Overnight Visitors | 0 | - | 4.80 | 41,699 |
| Word Scramble - European Countries | 0 | - | 4.73 | 142,139 |
| Top 20 Football Clubs in Europe | 0 | - | 4.48 | 116,224 |
| Slavic Languages | 0 | - | 4.68 | 54,600 |
| Famous French People | 0 | - | 4.07 | 35,984 |
| Word Chain - France | 0 | - | 4.38 | 42,895 |
| Capitals of Italian Regions | 0 | - | 4.62 | 36,701 |
| Italian Foods | 0 | - | 4.30 | 73,108 |
| The Mafia Quiz | 0 | - | 4.46 | 23,408 |
| History of The Netherlands | 0 | - | 4.46 | 17,524 |
| Spanish Immigration by Country | 0 | - | 4.63 | 55,585 |
| Canary Islands | 0 | - | 4.62 | 17,508 |
| Switzerland Immigration by Country | 0 | - | 4.69 | 29,947 |
| British Spellings | 0 | - | 4.06 | 99,551 |
| British Groups of Things | 0 | - | 4.25 | 82,969 |
| British Acronyms | 0 | - | 4.40 | 45,899 |
| United Kingdom Decoder | 0 | - | 4.29 | 40,084 |
| English Monarchs in Order by First Letter | 0 | - | 4.38 | 32,053 |
| Geography of Scotland | 0 | - | 4.63 | 21,704 |
| 100 Longest Rivers in Europe - with a Map | 0 | - | 4.94 | 65,765 |
| French Geography Quiz #1 | 0 | - | 4.89 | 35,005 |
| Countries With the Most German Speakers | 0 | - | 4.89 | 98,015 |
| Letters of the Greek Alphabet | 0 | - | 4.97 | 650,510 |
| Name that Greek Letter | 0 | - | 4.93 | 324,618 |
| History of Spain | 0 | - | 4.23 | 21,143 |
| Languages of Spain | 0 | - | 4.36 | 23,394 |
| British to American Word Translation | 0 | - | 3.74 | 255,265 |
| British Foods by Description | 0 | - | 3.94 | 48,362 |
| British and American Word Differences | 0 | - | 2.63 | 46,915 |
| British Geography Quiz #2 | 0 | - | 4.29 | 28,182 |
| Wonderwall Lyrics | 0 | - | 4.25 | 74,000 |
| Best-Selling British Musical Acts | 0 | - | 4.49 | 47,005 |
| Bridges of London | 0 | - | 4.17 | 10,134 |
| British Sport Trivia | 0 | - | 4.37 | 20,506 |
| Famous Welsh People | 0 | - | 4.34 | 11,636 |
| Malta Country Quiz | 0 | - | 4.81 | 31,197 |
| Top European Languages on a Map | 0 | - | 4.77 | 132,610 |
| History of Russia Quiz | 0 | - | 4.47 | 31,980 |
| Russia Multiple Choice | 0 | - | 4.58 | 40,829 |
| Movies Set in France | 0 | - | 4.26 | 13,139 |
| French Inventions | 0 | - | 4.10 | 13,918 |
| History of Paris | 0 | - | 4.24 | 13,667 |
| Word Chain - Germany | 0 | - | 4.31 | 22,657 |
| Countries that Beat Germany | 0 | - | 4.94 | 107,062 |
| The Trojan War | 0 | - | 4.83 | 39,928 |
| Greek Mythology General Knowledge #1 | 0 | - | 4.85 | 112,643 |
| Word Chain - Italy | 0 | - | 4.07 | 23,205 |
| Embarrassing Chapters in Italian History | 0 | - | 4.24 | 12,144 |
| Ancient Roman Trivia #1 | 0 | - | 4.85 | 85,457 |
| Roman Emperors | 0 | - | 4.95 | 120,843 |
| Famous Nordic People | 0 | - | 4.34 | 20,234 |
| Famous Spaniards Quiz | 0 | - | 4.24 | 11,627 |
| Invasions of Great Britain | 0 | - | 4.51 | 60,036 |
| Word Chain - United Kingdom | 0 | - | 4.05 | 29,381 |
| The British Royal Family - Modern Times | 0 | - | 4.16 | 21,562 |
| People on Money - England | 0 | - | 4.29 | 16,634 |
| Name a Valid English City | 0 | - | 4.19 | 16,783 |
| A Quiz About The Beatles | 0 | - | 4.56 | 48,256 |
| Asian Countries by First 2 Letters | 0 | - | 4.92 | 280,257 |
| African Countries by First 2 Letters | 0 | - | 4.96 | 269,008 |
| Australian Capitals | 0 | - | 4.92 | 62,802 |
| European Geography By Letter - A | 0 | - | 4.52 | 147,621 |
| European Geography By Letter - B #1 | 0 | - | 4.62 | 120,987 |
| European Geography By Letter - C | 0 | - | 4.43 | 122,504 |
| European Geography By Letter - D | 0 | - | 4.50 | 109,999 |
| European Geography By Letter - L | 0 | - | 4.52 | 114,676 |
| European Geography By Letter - M | 0 | - | 4.69 | 131,997 |
| European Geography By Letter - N | 0 | - | 4.44 | 101,821 |
| European Geography By Letter - R | 0 | - | 4.43 | 94,337 |
| European Geography By Letter - V | 0 | - | 4.42 | 93,554 |
| European Geography By Letter - T | 0 | - | 4.41 | 83,242 |
| Europe Map Quiz | 0 | - | 5.00 | 4,779,766 |
| Europe Geography Quiz #1 | 0 | - | 4.55 | 71,442 |
| Europe Geography Quiz #2 | 0 | - | 4.57 | 72,096 |
| Europe Geography Quiz #4 | 0 | - | 4.57 | 70,395 |
| Europe Geography Quiz #5 | 0 | - | 4.55 | 61,362 |
| European Geography By Letter - S #1 | 0 | - | 4.63 | 101,174 |
| Four Letter European Geography #1 | 0 | - | 4.41 | 28,409 |
| Four Letter European Geography #2 | 0 | - | 4.54 | 20,630 |
| Capitals of French Regions | 0 | - | 4.45 | 16,152 |
| Capitals of German States | 0 | - | 4.74 | 29,032 |
| Chancellors of Germany, 1949–present | 0 | - | 4.60 | 23,476 |
| Olympian Gods Quiz | 0 | - | 4.96 | 502,883 |
| Ancient Greek Words | 0 | - | 4.93 | 112,210 |
| Imagine Lyrics | 0 | - | 4.53 | 43,497 |
| Oceania Map Quiz | 0 | - | 4.98 | 657,738 |
| European Physical Geography | 0 | - | 4.26 | 33,571 |
| Geography of Russia | 0 | - | 4.57 | 21,573 |
| Slovakia... or Slovenia? | 0 | - | 4.69 | 42,069 |
| German History A-Z | 0 | - | 4.49 | 24,809 |
| Roman Numeral Decoding Quiz | 0 | - | 4.94 | 438,949 |
| Two Letter Roman Numerals | 0 | - | 4.97 | 56,403 |
| Sweden Immigration by Country | 0 | - | 4.55 | 56,305 |
| United Kingdom A-Z | 0 | - | 4.51 | 88,253 |
| British Geography Multiple Choice | 0 | - | 4.49 | 43,417 |
| The Thirteen Dwarves in the Hobbit | 0 | - | 4.81 | 28,767 |
| Beatles Lyrics First Names | 0 | - | 4.36 | 40,078 |
| Beatles Songs by Synonyms | 0 | - | 4.74 | 40,957 |
| Elton John Quiz | 0 | - | 4.49 | 18,507 |
| Wives of King Henry VIII | 0 | - | 4.55 | 53,435 |
| Countries the UK Declared War On | 0 | - | 4.55 | 123,094 |
| Geography of the British Empire | 0 | - | 4.48 | 39,811 |
| Champions League Top 4 | 0 | - | 4.77 | 138,105 |
| East Asia Map Quiz | 0 | - | 4.99 | 1,450,977 |
| Asia Map Quiz | 0 | - | 4.99 | 922,775 |
| Africa Map Quiz | 0 | - | 5.00 | 2,125,649 |
| Oceanian Capitals - Map Quiz | 0 | - | 4.95 | 51,218 |
| Australia Map Quiz | 0 | - | 4.95 | 345,715 |
| United States Map Quiz | 0 | - | 4.98 | 4,167,374 |
| Mediterranean Countries Quiz | 0 | - | 4.99 | 213,372 |
| Countries with Territorial Claims in Antarctica | 0 | - | 4.94 | 92,822 |
| Countries That Use the Euro | 0 | - | 4.95 | 106,215 |
| Europe Cities Map Quiz | 0 | - | 4.99 | 365,663 |
| European Geography By Letter - E | 0 | - | 4.23 | 114,752 |
| European Geography By Letter - F | 0 | - | 4.15 | 94,064 |
| European Geography By Letter - H | 0 | - | 4.30 | 96,871 |
| European Geography By Letter - G | 0 | - | 4.27 | 103,566 |
| European Geography By Letter - I | 0 | - | 4.09 | 96,265 |
| European Geography By Letter - K | 0 | - | 4.15 | 70,906 |
| European Geography By Letter - O | 0 | - | 4.29 | 63,319 |
| European Geography by Letter - W | 0 | - | 4.21 | 83,389 |
| Europe Geography Quiz #3 | 0 | - | 4.35 | 63,824 |
| European Geography By Letter - S #2 | 0 | - | 4.20 | 51,681 |
| 10 Easternmost Countries in Europe | 0 | - | 4.87 | 116,673 |
| European Geography A-Z | 0 | - | 4.29 | 49,428 |
| Country Codes of Europe | 0 | - | 3.43 | 13,782 |
| The Only European Country ... | 0 | - | 4.91 | 218,266 |
