| States of the German Confederation in 1848 | 0 | - | 4.90 | 32,473 |
| States of Germany | 0 | - | 4.95 | 154,623 |
| Germany Immigration by Country | 0 | - | 4.86 | 81,722 |
| Germany True or False? | 0 | - | 4.61 | 49,029 |
| European Countries by First 2 Letters | 0 | - | 4.95 | 532,631 |
| Save Europeans by Guessing Countries | 0 | - | 4.86 | 216,911 |
| Italy Multiple Choice | 0 | - | 4.74 | 104,408 |
| Regions of Italy | 0 | - | 4.92 | 77,133 |
| Netherlands Immigration by Country | 0 | - | 4.93 | 52,825 |
| Regions of Spain Quiz | 0 | - | 4.90 | 115,396 |
| Cantons of Switzerland | 0 | - | 4.98 | 51,789 |
| 10 Closest Megacities to London | 0 | - | 4.90 | 17,843 |
| Count to 10 in Europe: Pro | 0 | - | 4.86 | 69,765 |
| Official European Union Languages | 0 | - | 4.97 | 239,869 |
| European Countries in their Native Language | 0 | - | 4.99 | 158,697 |
| Famous Germans | 0 | - | 4.50 | 55,808 |
| German Groups of Things | 0 | - | 4.47 | 38,645 |
| England or Wales? | 0 | - | 4.94 | 45,982 |
| Europe by Borders in 30 Seconds | 0 | - | 4.98 | 431,040 |
| France Multiple Choice | 0 | - | 4.39 | 40,855 |
| Biggest Cities in Germany in 1910 | 0 | - | 4.41 | 23,562 |
| Europe Geography Decoder | 0 | - | 4.87 | 70,335 |
| Countries that Beat Switzerland | 0 | - | 4.88 | 42,065 |
| Russia Multiple Choice | 0 | - | 4.58 | 40,881 |
| Country Quiz on a Map - Germany | 0 | - | 4.95 | 35,578 |
| History of Italy | 0 | - | 4.55 | 32,159 |
| Geography of the Dutch Empire | 0 | - | 4.62 | 34,829 |
| Countries of the Spanish Empire | 0 | - | 4.52 | 77,433 |
| Australia True or False | 0 | - | 4.87 | 57,162 |
| Add A Letter - Make a European City | 0 | - | 4.90 | 23,513 |
| Celtic Nations | 0 | - | 4.61 | 47,106 |
| Most Guessed Cities in Europe - Not Capitals | 0 | - | 4.83 | 88,052 |
| Countries of Europe with an Empty Map | 0 | - | 5.00 | 312,892 |
| All First-Level Subdivisions of Europe on a Map | 0 | - | 4.99 | 176,012 |
| Capitals of German States | 0 | - | 4.74 | 29,076 |
| Chancellors of Germany, 1949–present | 0 | - | 4.60 | 23,551 |
| Geography of Germany | 0 | - | 4.35 | 17,291 |
| History of Germany | 0 | - | 4.39 | 52,980 |
| Counties of England | 0 | - | 4.97 | 803,276 |
| "Big Five" European Soccer Champions Since 2000 | 0 | - | 4.97 | 361,935 |
| Regions of France | 0 | - | 4.70 | 122,168 |
| France Immigration by Country | 0 | - | 4.70 | 76,955 |
| Largest Islands of Greece | 0 | - | 4.59 | 48,509 |
| Famous Italians by Clue | 0 | - | 4.45 | 90,421 |
| Provinces of the Netherlands | 0 | - | 4.80 | 41,798 |
| 100 Greatest Britons Quiz | 0 | - | 4.41 | 48,415 |
| Foods in a Full English Breakfast | 0 | - | 4.46 | 103,853 |
| Australia... or New Zealand? | 0 | - | 4.83 | 62,035 |
| European Geography By Letter - P #1 | 0 | - | 4.81 | 99,018 |
| Catholic Countries in Europe | 0 | - | 4.83 | 95,808 |
| Biggest Countries in Europe in 1700 | 0 | - | 4.73 | 58,764 |
| European Geography By Letter - B #2 | 0 | - | 4.87 | 88,934 |
| Category Elimination - European Geography #3 | 0 | - | 4.86 | 82,021 |
| Federal Subjects of Russia | 0 | - | 4.95 | 149,615 |
| History of Austria | 0 | - | 4.70 | 17,977 |
| Regions of France Map Quiz | 0 | - | 4.97 | 145,689 |
| Geography of the French Empire | 0 | - | 4.45 | 27,221 |
| The French Revolution | 0 | - | 4.47 | 24,151 |
| History of France | 0 | - | 4.61 | 57,652 |
| States of Germany Map Quiz | 0 | - | 4.92 | 133,851 |
| Word Chain - Germany | 0 | - | 4.31 | 22,687 |
| The Vikings! | 0 | - | 4.46 | 28,409 |
| The Portuguese Empire | 0 | - | 4.58 | 12,113 |
| American to British Word Translation | 0 | - | 4.14 | 139,734 |
| Languages of the United Kingdom | 0 | - | 4.14 | 41,068 |
| Countries and Territories of the United Kingdom | 0 | - | 4.90 | 94,558 |
| Counties of England Map Quiz | 0 | - | 4.97 | 309,121 |
| British Geography Multiple Choice | 0 | - | 4.49 | 43,462 |
| Champions League Winners | 0 | - | 4.92 | 1,016,616 |
| Category Elimination - European Geography #1 | 0 | - | 4.98 | 235,988 |
| European Map without 10 Random Countries | 0 | - | 4.97 | 278,999 |
| Category Elimination - European Geography #2 | 0 | - | 4.99 | 169,012 |
| Departments of France | 0 | - | 4.93 | 55,221 |
| Countries Surrounding Rome | 0 | - | 4.97 | 49,753 |
| All UEFA Champions League Teams Ever | 0 | - | 4.85 | 132,233 |
| Pre-Euro Currencies | 0 | - | 4.44 | 52,755 |
| European Countries with the Fewest Overnight Visitors | 0 | - | 4.80 | 41,723 |
| Word Scramble - European Countries | 0 | - | 4.73 | 142,359 |
| Top 20 Football Clubs in Europe | 0 | - | 4.48 | 122,642 |
| Slavic Languages | 0 | - | 4.67 | 54,713 |
| Famous French People | 0 | - | 4.05 | 36,121 |
| Word Chain - France | 0 | - | 4.38 | 42,946 |
| Capitals of Italian Regions | 0 | - | 4.62 | 36,746 |
| Italian Foods | 0 | - | 4.30 | 73,300 |
| The Mafia Quiz | 0 | - | 4.46 | 23,441 |
| History of The Netherlands | 0 | - | 4.46 | 17,556 |
| Spanish Immigration by Country | 0 | - | 4.63 | 55,634 |
| Canary Islands | 0 | - | 4.62 | 17,543 |
| Switzerland Immigration by Country | 0 | - | 4.69 | 30,092 |
| British Spellings | 0 | - | 4.06 | 99,612 |
| British Groups of Things | 0 | - | 4.26 | 83,024 |
| British Acronyms | 0 | - | 4.40 | 45,949 |
| United Kingdom Decoder | 0 | - | 4.29 | 40,115 |
| English Monarchs in Order by First Letter | 0 | - | 4.38 | 32,139 |
| Geography of Scotland | 0 | - | 4.63 | 21,746 |
| 100 Longest Rivers in Europe - with a Map | 0 | - | 4.94 | 65,975 |
| French Geography Quiz #1 | 0 | - | 4.89 | 35,105 |
| Letters of the Greek Alphabet | 0 | - | 4.97 | 652,220 |
| Name that Greek Letter | 0 | - | 4.93 | 325,069 |
| History of Spain | 0 | - | 4.23 | 21,165 |
| Languages of Spain | 0 | - | 4.36 | 23,445 |
| British to American Word Translation | 0 | - | 3.74 | 255,359 |
| British Foods by Description | 0 | - | 3.94 | 48,394 |
| British and American Word Differences | 0 | - | 2.63 | 46,932 |
| British Geography Quiz #2 | 0 | - | 4.30 | 28,227 |
| Bridges of London | 0 | - | 4.17 | 10,146 |
| British Sport Trivia | 0 | - | 4.39 | 20,533 |
| Famous Welsh People | 0 | - | 4.34 | 11,699 |
| Malta Country Quiz | 0 | - | 4.81 | 31,242 |
| Canada Multiple Choice Quiz | 0 | - | 4.50 | 49,705 |
| Top European Languages on a Map | 0 | - | 4.77 | 132,881 |
| History of Russia Quiz | 0 | - | 4.47 | 32,009 |
| Movies Set in France | 0 | - | 4.26 | 13,153 |
| French Inventions | 0 | - | 4.10 | 13,929 |
| Country Quiz on a Map - France | 0 | - | 4.98 | 47,728 |
| History of Paris | 0 | - | 4.24 | 13,682 |
| The Trojan War | 0 | - | 4.83 | 40,006 |
| Greek Mythology General Knowledge #1 | 0 | - | 4.85 | 113,019 |
| Word Chain - Italy | 0 | - | 4.07 | 23,225 |
| Embarrassing Chapters in Italian History | 0 | - | 4.24 | 12,168 |
| Ancient Roman Trivia #1 | 0 | - | 4.85 | 85,612 |
| Roman Emperors | 0 | - | 4.95 | 121,272 |
| Famous Nordic People | 0 | - | 4.34 | 20,315 |
| Famous Spaniards Quiz | 0 | - | 4.24 | 11,645 |
| Invasions of Great Britain | 0 | - | 4.51 | 60,108 |
| Word Chain - United Kingdom | 0 | - | 4.05 | 29,417 |
| The British Royal Family - Modern Times | 0 | - | 4.16 | 21,580 |
| People on Money - England | 0 | - | 4.29 | 16,646 |
| Name a Valid English City | 0 | - | 4.19 | 16,830 |
| Asian Countries by First 2 Letters | 0 | - | 4.92 | 280,787 |
| Japan Multiple Choice | 0 | - | 4.48 | 40,845 |
| African Countries by First 2 Letters | 0 | - | 4.96 | 269,466 |
| Australian Capitals | 0 | - | 4.92 | 62,838 |
| European Geography By Letter - A | 0 | - | 4.52 | 148,270 |
| European Geography By Letter - B #1 | 0 | - | 4.62 | 121,666 |
| European Geography By Letter - C | 0 | - | 4.44 | 124,122 |
| European Geography By Letter - D | 0 | - | 4.49 | 118,196 |
| European Geography By Letter - L | 0 | - | 4.52 | 115,193 |
| European Geography By Letter - M | 0 | - | 4.69 | 132,666 |
| European Geography By Letter - N | 0 | - | 4.44 | 102,221 |
| European Geography By Letter - R | 0 | - | 4.43 | 94,837 |
| European Geography By Letter - V | 0 | - | 4.43 | 94,122 |
| European Geography By Letter - T | 0 | - | 4.41 | 83,709 |
| Europe Map Quiz | 0 | - | 5.00 | 4,789,515 |
| Europe Geography Quiz #1 | 0 | - | 4.55 | 71,536 |
| Europe Geography Quiz #2 | 0 | - | 4.57 | 72,199 |
| Europe Geography Quiz #4 | 0 | - | 4.57 | 70,473 |
| Europe Geography Quiz #5 | 0 | - | 4.55 | 61,437 |
| European Geography By Letter - S #1 | 0 | - | 4.63 | 101,514 |
| Four Letter European Geography #1 | 0 | - | 4.41 | 28,560 |
| Four Letter European Geography #2 | 0 | - | 4.54 | 20,753 |
| Capitals of French Regions | 0 | - | 4.45 | 16,185 |
| German Loan Words | 0 | - | 4.27 | 141,030 |
| Olympian Gods Quiz | 0 | - | 4.96 | 503,910 |
| Ancient Greek Words | 0 | - | 4.93 | 112,527 |
| Name Every Beatles Song | 0 | - | 4.97 | 238,423 |
| Bohemian Rhapsody Lyrics | 0 | - | 4.98 | 292,844 |
| Oceania Map Quiz | 0 | - | 4.98 | 659,682 |
| European Physical Geography | 0 | - | 4.26 | 33,600 |
| Geography of Russia | 0 | - | 4.57 | 21,606 |
| Slovakia... or Slovenia? | 0 | - | 4.69 | 42,137 |
| German History A-Z | 0 | - | 4.49 | 24,924 |
| Roman Numeral Decoding Quiz | 0 | - | 4.94 | 439,957 |
| Two Letter Roman Numerals | 0 | - | 4.97 | 56,532 |
| Sweden Immigration by Country | 0 | - | 4.53 | 56,398 |
| United Kingdom A-Z | 0 | - | 4.51 | 88,390 |
| The Thirteen Dwarves in the Hobbit | 0 | - | 4.81 | 28,824 |
| Wives of King Henry VIII | 0 | - | 4.55 | 53,468 |
| Countries the UK Declared War On | 0 | - | 4.55 | 123,289 |
| Geography of the British Empire | 0 | - | 4.48 | 39,851 |
| Champions League Top 4 | 0 | - | 4.78 | 139,229 |
| East Asia Map Quiz | 0 | - | 4.99 | 1,452,749 |
| Asia Map Quiz | 0 | - | 4.99 | 925,574 |
| Africa Map Quiz | 0 | - | 5.00 | 2,129,270 |
| Oceanian Capitals - Map Quiz | 0 | - | 4.96 | 51,495 |
| Australia Map Quiz | 0 | - | 4.95 | 346,252 |
| United States Map Quiz | 0 | - | 4.98 | 4,172,023 |
| Mediterranean Countries Quiz | 0 | - | 4.99 | 214,056 |
| Countries with Territorial Claims in Antarctica | 0 | - | 4.94 | 92,947 |
| Countries That Use the Euro | 0 | - | 4.95 | 106,921 |
| Europe Cities Map Quiz | 0 | - | 4.99 | 366,328 |
| European Geography By Letter - E | 0 | - | 4.23 | 115,330 |
| European Geography By Letter - F | 0 | - | 4.15 | 94,591 |
| European Geography By Letter - H | 0 | - | 4.30 | 97,296 |
| European Geography By Letter - G | 0 | - | 4.27 | 104,063 |
| European Geography By Letter - I | 0 | - | 4.07 | 96,654 |
| European Geography By Letter - K | 0 | - | 4.15 | 71,298 |
| European Geography By Letter - O | 0 | - | 4.29 | 63,679 |
| European Geography by Letter - W | 0 | - | 4.21 | 83,659 |
| Europe Geography Quiz #3 | 0 | - | 4.35 | 63,905 |
| European Geography By Letter - S #2 | 0 | - | 4.20 | 51,958 |
| 10 Easternmost Countries in Europe | 0 | - | 4.87 | 117,243 |
| European Geography A-Z | 0 | - | 4.29 | 49,490 |
| Country Codes of Europe | 0 | - | 3.45 | 13,838 |
| The Only European Country ... | 0 | - | 4.91 | 219,188 |
| European Countries NOT in NATO | 0 | - | 4.91 | 62,616 |
| European Geographic Groups of Four | 0 | - | 4.56 | 20,278 |
| Austria... or Australia? | 0 | - | 4.67 | 104,781 |
| Presidents of France | 0 | - | 4.25 | 24,346 |
| French Foods | 0 | - | 4.00 | 27,778 |
