| States of the German Confederation in 1848 | 0 | - | 4.90 | 31,840 |
| States of Germany | 0 | - | 4.96 | 151,578 |
| Germany Immigration by Country | 0 | - | 4.85 | 80,776 |
| Germany True or False? | 0 | - | 4.61 | 48,707 |
| European Countries by First 2 Letters | 0 | - | 4.95 | 528,351 |
| Save Europeans by Guessing Countries | 0 | - | 4.83 | 211,668 |
| Italy Multiple Choice | 0 | - | 4.73 | 103,573 |
| Regions of Italy | 0 | - | 4.92 | 75,418 |
| Netherlands Immigration by Country | 0 | - | 4.93 | 51,487 |
| Regions of Spain Quiz | 0 | - | 4.90 | 113,477 |
| Cantons of Switzerland | 0 | - | 4.98 | 50,918 |
| 10 Closest Megacities to London | 0 | - | 4.90 | 17,649 |
| Count to 10 in Europe: Pro | 0 | - | 4.86 | 68,941 |
| Official European Union Languages | 0 | - | 4.97 | 237,939 |
| European Countries in their Native Language | 0 | - | 4.99 | 157,501 |
| Famous Germans | 0 | - | 4.50 | 54,999 |
| German Groups of Things | 0 | - | 4.46 | 38,412 |
| England or Wales? | 0 | - | 4.94 | 45,554 |
| Europe by Borders in 30 Seconds | 0 | - | 4.98 | 427,102 |
| France Multiple Choice | 0 | - | 4.38 | 40,691 |
| Biggest Cities in Germany in 1910 | 0 | - | 4.41 | 23,450 |
| Europe Geography Decoder | 0 | - | 4.86 | 69,830 |
| Countries that Beat Switzerland | 0 | - | 4.88 | 41,715 |
| Russia Multiple Choice | 0 | - | 4.58 | 40,675 |
| History of Italy | 0 | - | 4.55 | 31,923 |
| Geography of the Dutch Empire | 0 | - | 4.61 | 34,599 |
| Countries of the Spanish Empire | 0 | - | 4.52 | 77,141 |
| Australia True or False | 0 | - | 4.87 | 56,735 |
| Add A Letter - Make a European City | 0 | - | 4.90 | 23,344 |
| Celtic Nations | 0 | - | 4.69 | 46,889 |
| Most Guessed Cities in Europe - Not Capitals | 0 | - | 4.82 | 87,187 |
| Countries of Europe with an Empty Map | 0 | - | 5.00 | 309,747 |
| All First-Level Subdivisions of Europe on a Map | 0 | - | 4.99 | 170,076 |
| Capitals of German States | 0 | - | 4.74 | 28,916 |
| Chancellors of Germany, 1949–present | 0 | - | 4.60 | 23,252 |
| Geography of Germany | 0 | - | 4.35 | 17,149 |
| History of Germany | 0 | - | 4.39 | 52,756 |
| Counties of England | 0 | - | 4.97 | 793,863 |
| "Big Five" European Soccer Champions Since 2000 | 0 | - | 4.97 | 353,551 |
| Regions of France | 0 | - | 4.75 | 120,236 |
| France Immigration by Country | 0 | - | 4.70 | 76,331 |
| Largest Islands of Greece | 0 | - | 4.59 | 47,810 |
| Famous Italians by Clue | 0 | - | 4.45 | 89,089 |
| Provinces of the Netherlands | 0 | - | 4.80 | 41,166 |
| 100 Greatest Britons Quiz | 0 | - | 4.41 | 48,195 |
| Foods in a Full English Breakfast | 0 | - | 4.46 | 102,986 |
| Australia... or New Zealand? | 0 | - | 4.83 | 61,394 |
| European Geography By Letter - P #1 | 0 | - | 4.80 | 96,925 |
| Catholic Countries in Europe | 0 | - | 4.83 | 94,768 |
| Biggest Countries in Europe in 1700 | 0 | - | 4.73 | 58,356 |
| European Geography By Letter - B #2 | 0 | - | 4.84 | 77,294 |
| Category Elimination - European Geography #3 | 0 | - | 4.85 | 80,561 |
| Federal Subjects of Russia | 0 | - | 4.95 | 145,878 |
| History of Austria | 0 | - | 4.70 | 17,825 |
| Regions of France Map Quiz | 0 | - | 4.97 | 143,991 |
| Geography of the French Empire | 0 | - | 4.45 | 27,013 |
| The French Revolution | 0 | - | 4.46 | 23,886 |
| History of France | 0 | - | 4.59 | 56,745 |
| States of Germany Map Quiz | 0 | - | 4.91 | 132,403 |
| Word Chain - Germany | 0 | - | 4.31 | 22,551 |
| The Vikings! | 0 | - | 4.46 | 28,307 |
| The Portuguese Empire | 0 | - | 4.58 | 12,042 |
| American to British Word Translation | 0 | - | 4.14 | 138,600 |
| Languages of the United Kingdom | 0 | - | 4.13 | 40,842 |
| Countries and Territories of the United Kingdom | 0 | - | 4.89 | 93,477 |
| Counties of England Map Quiz | 0 | - | 4.97 | 306,901 |
| British Geography Multiple Choice | 0 | - | 4.49 | 43,285 |
| Champions League Winners | 0 | - | 4.92 | 1,002,621 |
| Category Elimination - European Geography #1 | 0 | - | 4.98 | 232,266 |
| European Map without 10 Random Countries | 0 | - | 4.97 | 276,047 |
| Category Elimination - European Geography #2 | 0 | - | 4.99 | 166,442 |
| Departments of France | 0 | - | 4.93 | 53,604 |
| Countries Surrounding Rome | 0 | - | 4.97 | 49,491 |
| All UEFA Champions League Teams Ever | 0 | - | 4.85 | 129,544 |
| Pre-Euro Currencies | 0 | - | 4.44 | 52,537 |
| European Countries with the Fewest Overnight Visitors | 0 | - | 4.80 | 41,640 |
| Word Scramble - European Countries | 0 | - | 4.70 | 141,423 |
| Top 20 Football Clubs in Europe | 0 | - | 4.48 | 114,166 |
| Slavic Languages | 0 | - | 4.68 | 54,226 |
| Word Chain - France | 0 | - | 4.38 | 42,718 |
| Capitals of Italian Regions | 0 | - | 4.62 | 36,562 |
| Italian Foods | 0 | - | 4.30 | 72,569 |
| The Mafia Quiz | 0 | - | 4.46 | 23,274 |
| History of The Netherlands | 0 | - | 4.46 | 17,389 |
| Spanish Immigration by Country | 0 | - | 4.63 | 55,398 |
| Canary Islands | 0 | - | 4.62 | 17,454 |
| Switzerland Immigration by Country | 0 | - | 4.70 | 29,534 |
| British Spellings | 0 | - | 4.06 | 99,382 |
| British Groups of Things | 0 | - | 4.25 | 82,816 |
| British Acronyms | 0 | - | 4.39 | 45,734 |
| United Kingdom Decoder | 0 | - | 4.29 | 40,007 |
| Geography of Scotland | 0 | - | 4.63 | 21,574 |
| 100 Longest Rivers in Europe - with a Map | 0 | - | 4.94 | 65,265 |
| French Geography Quiz #1 | 0 | - | 4.89 | 34,689 |
| Letters of the Greek Alphabet | 0 | - | 4.97 | 645,516 |
| Name that Greek Letter | 0 | - | 4.93 | 322,900 |
| History of Spain | 0 | - | 4.23 | 21,061 |
| Languages of Spain | 0 | - | 4.36 | 23,265 |
| British to American Word Translation | 0 | - | 3.74 | 254,959 |
| British Foods by Description | 0 | - | 3.94 | 48,303 |
| British and American Word Differences | 0 | - | 2.63 | 46,845 |
| British Geography Quiz #2 | 0 | - | 4.29 | 27,563 |
| Bridges of London | 0 | - | 4.17 | 10,088 |
| British Sport Trivia | 0 | - | 4.37 | 20,424 |
| Famous Welsh People | 0 | - | 4.29 | 11,289 |
| Malta Country Quiz | 0 | - | 4.81 | 30,976 |
| African Countries by First 2 Letters | 0 | - | 4.96 | 267,677 |
| Canada Multiple Choice Quiz | 0 | - | 4.50 | 49,182 |
| Top European Languages on a Map | 0 | - | 4.77 | 131,757 |
| History of Russia Quiz | 0 | - | 4.49 | 31,866 |
| Famous French People | 0 | - | 4.12 | 31,747 |
| Movies Set in France | 0 | - | 4.26 | 13,107 |
| French Inventions | 0 | - | 4.08 | 13,887 |
| History of Paris | 0 | - | 4.24 | 13,633 |
| The Trojan War | 0 | - | 4.83 | 39,621 |
| Greek Mythology General Knowledge #1 | 0 | - | 4.85 | 111,392 |
| Word Chain - Italy | 0 | - | 4.07 | 23,146 |
| Embarrassing Chapters in Italian History | 0 | - | 4.24 | 12,078 |
| Ancient Roman Trivia #1 | 0 | - | 4.85 | 84,362 |
| Roman Emperors | 0 | - | 4.95 | 119,525 |
| Famous Nordic People | 0 | - | 4.34 | 20,026 |
| Famous Spaniards Quiz | 0 | - | 4.24 | 11,587 |
| Invasions of Great Britain | 0 | - | 4.51 | 59,772 |
| Word Chain - United Kingdom | 0 | - | 4.05 | 29,318 |
| The British Royal Family - Modern Times | 0 | - | 4.16 | 21,511 |
| People on Money - England | 0 | - | 4.29 | 16,598 |
| Name a Valid English City | 0 | - | 4.19 | 16,692 |
| English Monarchs in Order by First Letter | 0 | - | 4.38 | 31,615 |
| Asian Countries by First 2 Letters | 0 | - | 4.91 | 278,459 |
| Japan Multiple Choice | 0 | - | 4.48 | 40,639 |
| Australian Capitals | 0 | - | 4.92 | 62,684 |
| European Geography By Letter - A | 0 | - | 4.61 | 140,200 |
| European Geography By Letter - B #1 | 0 | - | 4.67 | 111,890 |
| European Geography By Letter - C | 0 | - | 4.46 | 112,721 |
| European Geography By Letter - D | 0 | - | 4.50 | 107,519 |
| European Geography By Letter - L | 0 | - | 4.52 | 112,768 |
| European Geography By Letter - M | 0 | - | 4.64 | 129,708 |
| European Geography By Letter - N | 0 | - | 4.44 | 100,265 |
| European Geography By Letter - R | 0 | - | 4.42 | 92,994 |
| European Geography By Letter - V | 0 | - | 4.43 | 92,593 |
| European Geography By Letter - T | 0 | - | 4.41 | 81,856 |
| Europe Map Quiz | 0 | - | 5.00 | 4,751,221 |
| Europe Geography Quiz #1 | 0 | - | 4.55 | 71,179 |
| Europe Geography Quiz #2 | 0 | - | 4.57 | 71,835 |
| Europe Geography Quiz #4 | 0 | - | 4.57 | 70,119 |
| Europe Geography Quiz #5 | 0 | - | 4.55 | 61,154 |
| European Geography By Letter - S #1 | 0 | - | 4.63 | 100,087 |
| Four Letter European Geography #2 | 0 | - | 4.57 | 20,323 |
| Capitals of French Regions | 0 | - | 4.45 | 16,031 |
| German Loan Words | 0 | - | 4.27 | 135,687 |
| Olympian Gods Quiz | 0 | - | 4.96 | 499,127 |
| Ancient Greek Words | 0 | - | 4.93 | 111,237 |
| Name Every Beatles Song | 0 | - | 4.97 | 235,386 |
| Bohemian Rhapsody Lyrics | 0 | - | 4.98 | 291,351 |
| Africa Map Quiz | 0 | - | 5.00 | 2,112,980 |
| Oceania Map Quiz | 0 | - | 4.98 | 639,670 |
| European Physical Geography | 0 | - | 4.26 | 33,449 |
| Geography of Russia | 0 | - | 4.57 | 21,500 |
| Slovakia... or Slovenia? | 0 | - | 4.69 | 41,886 |
| German History A-Z | 0 | - | 4.49 | 24,551 |
| Roman Numeral Decoding Quiz | 0 | - | 4.94 | 435,721 |
| Two Letter Roman Numerals | 0 | - | 4.97 | 55,947 |
| Sweden Immigration by Country | 0 | - | 4.55 | 55,981 |
| United Kingdom A-Z | 0 | - | 4.53 | 87,517 |
| The Thirteen Dwarves in the Hobbit | 0 | - | 4.81 | 28,553 |
| Wives of King Henry VIII | 0 | - | 4.55 | 53,290 |
| Countries the UK Declared War On | 0 | - | 4.61 | 122,229 |
| Geography of the British Empire | 0 | - | 4.48 | 39,617 |
| Champions League Top 4 | 0 | - | 4.77 | 135,453 |
| East Asia Map Quiz | 0 | - | 4.99 | 1,445,415 |
| Asia Map Quiz | 0 | - | 4.99 | 913,035 |
| North Korea... or South Korea? | 0 | - | 4.47 | 80,566 |
| Countries of Africa | 0 | - | 5.00 | 2,526,570 |
| Landlocked Countries in Africa | 0 | - | 4.99 | 46,464 |
| African East Coast | 0 | - | 4.96 | 95,689 |
| Western Africa Map Quiz | 0 | - | 4.97 | 73,517 |
| Oceanian Capitals - Map Quiz | 0 | - | 4.95 | 50,370 |
| Australia Map Quiz | 0 | - | 4.95 | 343,586 |
| United States Map Quiz | 0 | - | 4.98 | 4,150,934 |
| Mediterranean Countries Quiz | 0 | - | 4.99 | 211,493 |
| Countries with Territorial Claims in Antarctica | 0 | - | 4.94 | 92,532 |
| Countries That Use the Euro | 0 | - | 4.95 | 104,297 |
| Europe Cities Map Quiz | 0 | - | 4.99 | 363,696 |
| European Geography By Letter - E | 0 | - | 4.23 | 112,821 |
| European Geography By Letter - F | 0 | - | 4.17 | 92,200 |
| European Geography By Letter - H | 0 | - | 4.30 | 95,405 |
| European Geography By Letter - G | 0 | - | 4.27 | 102,039 |
| European Geography By Letter - I | 0 | - | 4.10 | 94,925 |
| European Geography By Letter - K | 0 | - | 4.14 | 69,604 |
| European Geography By Letter - O | 0 | - | 4.28 | 62,264 |
| European Geography by Letter - W | 0 | - | 4.20 | 82,563 |
| Europe Geography Quiz #3 | 0 | - | 4.35 | 63,583 |
| European Geography By Letter - S #2 | 0 | - | 4.19 | 50,798 |
| 10 Easternmost Countries in Europe | 0 | - | 4.89 | 114,610 |
| European Geography A-Z | 0 | - | 4.29 | 49,166 |
| Country Codes of Europe | 0 | - | 3.43 | 13,694 |
| The Only European Country ... | 0 | - | 4.91 | 215,666 |
| European Countries NOT in NATO | 0 | - | 4.90 | 60,574 |
| Four Letter European Geography #1 | 0 | - | 4.40 | 27,989 |
| Austria... or Australia? | 0 | - | 4.68 | 104,184 |
