| Germany Multiple Choice | 0 | - | 4.84 | 54,029 |
| States of Germany | 0 | - | 4.96 | 149,884 |
| Germany Immigration by Country | 0 | - | 4.84 | 79,963 |
| States of the German Confederation in 1848 | 0 | - | 4.89 | 31,497 |
| European Countries by First 2 Letters | 0 | - | 4.95 | 526,137 |
| Regions of Italy | 0 | - | 4.92 | 74,623 |
| Netherlands Immigration by Country | 0 | - | 4.94 | 43,761 |
| Regions of Spain Quiz | 0 | - | 4.90 | 112,193 |
| Cantons of Switzerland | 0 | - | 4.98 | 50,073 |
| 10 Closest Megacities to London | 0 | - | 4.90 | 17,397 |
| Count to 10 in Europe: Pro | 0 | - | 4.85 | 68,543 |
| Official European Union Languages | 0 | - | 4.97 | 236,410 |
| European Countries in their Native Language | 0 | - | 4.99 | 156,631 |
| Famous Germans | 0 | - | 4.50 | 54,580 |
| German Groups of Things | 0 | - | 4.46 | 38,294 |
| Germany True or False? | 0 | - | 4.61 | 48,513 |
| Europe by Borders in 30 Seconds | 0 | - | 4.98 | 424,963 |
| Biggest Cities in Germany in 1910 | 0 | - | 4.41 | 23,375 |
| Languages of the United Kingdom | 0 | - | 4.13 | 40,690 |
| Europe Geography Decoder | 0 | - | 4.86 | 69,499 |
| Letters of the Greek Alphabet | 0 | - | 4.97 | 641,444 |
| Name that Greek Letter | 0 | - | 4.94 | 321,488 |
| Countries that Beat Switzerland | 0 | - | 4.88 | 41,543 |
| Top European Languages on a Map | 0 | - | 4.77 | 131,048 |
| History of Italy | 0 | - | 4.55 | 31,805 |
| Italy Multiple Choice | 0 | - | 4.74 | 103,114 |
| Geography of the Dutch Empire | 0 | - | 4.62 | 34,470 |
| Countries of the Spanish Empire | 0 | - | 4.52 | 76,966 |
| Top African Languages on a Map | 0 | - | 4.92 | 72,311 |
| Add A Letter - Make a European City | 0 | - | 4.90 | 23,228 |
| Celtic Nations | 0 | - | 4.69 | 46,802 |
| Top 10 Languages Spoken in Europe | 0 | - | 4.96 | 216,151 |
| Most Guessed Cities in Europe - Not Capitals | 0 | - | 4.82 | 86,808 |
| Countries of Europe with an Empty Map | 0 | - | 5.00 | 307,648 |
| All First-Level Subdivisions of Europe on a Map | 0 | - | 4.98 | 167,670 |
| Capitals of German States | 0 | - | 4.74 | 28,799 |
| Chancellors of Germany, 1949–present | 0 | - | 4.60 | 23,084 |
| Geography of Germany | 0 | - | 4.35 | 17,079 |
| History of Germany | 0 | - | 4.39 | 52,597 |
| Languages of Spain | 0 | - | 4.36 | 23,139 |
| Counties of England | 0 | - | 4.97 | 788,632 |
| "Big Five" European Soccer Champions Since 2000 | 0 | - | 4.97 | 349,437 |
| Top Asian Languages on a Map | 0 | - | 4.95 | 70,624 |
| Regions of France | 0 | - | 4.78 | 119,103 |
| France Immigration by Country | 0 | - | 4.72 | 75,933 |
| Largest Islands of Greece | 0 | - | 4.59 | 47,423 |
| Famous Italians by Clue | 0 | - | 4.45 | 88,280 |
| Provinces of the Netherlands | 0 | - | 4.80 | 40,744 |
| 100 Greatest Britons Quiz | 0 | - | 4.41 | 48,031 |
| Foods in a Full English Breakfast | 0 | - | 4.46 | 101,893 |
| European Geography By Letter - P #1 | 0 | - | 4.81 | 96,285 |
| Catholic Countries in Europe | 0 | - | 4.83 | 94,149 |
| Biggest Countries in Europe in 1700 | 0 | - | 4.73 | 58,112 |
| European Geography By Letter - B #2 | 0 | - | 4.83 | 76,161 |
| Category Elimination - European Geography #3 | 0 | - | 4.85 | 79,690 |
| Federal Subjects of Russia | 0 | - | 4.94 | 143,743 |
| History of Austria | 0 | - | 4.70 | 17,742 |
| Regions of France Map Quiz | 0 | - | 4.97 | 143,040 |
| Geography of the French Empire | 0 | - | 4.48 | 26,919 |
| The French Revolution | 0 | - | 4.46 | 23,758 |
| France Multiple Choice | 0 | - | 4.38 | 40,625 |
| History of France | 0 | - | 4.59 | 55,937 |
| States of Germany Map Quiz | 0 | - | 4.91 | 131,599 |
| Word Chain - Germany | 0 | - | 4.31 | 22,472 |
| The Vikings! | 0 | - | 4.45 | 28,237 |
| The Portuguese Empire | 0 | - | 4.54 | 11,984 |
| American to British Word Translation | 0 | - | 4.06 | 117,024 |
| Countries and Territories of the United Kingdom | 0 | - | 4.89 | 92,863 |
| Counties of England Map Quiz | 0 | - | 4.97 | 306,000 |
| Champions League Winners | 0 | - | 4.92 | 995,523 |
| Top 10 Non-English Languages Spoken in New York City | 0 | - | 4.84 | 65,566 |
| Category Elimination - European Geography #1 | 0 | - | 4.98 | 230,326 |
| European Map without 10 Random Countries | 0 | - | 4.97 | 274,044 |
| Category Elimination - European Geography #2 | 0 | - | 4.99 | 164,996 |
| Departments of France | 0 | - | 4.93 | 52,715 |
| Countries Surrounding Rome | 0 | - | 4.97 | 49,349 |
| England or Wales? | 0 | - | 4.94 | 45,289 |
| All UEFA Champions League Teams Ever | 0 | - | 4.84 | 128,357 |
| Countries with the Most Arabic Speakers | 0 | - | 4.92 | 79,402 |
| Pre-Euro Currencies | 0 | - | 4.44 | 52,429 |
| European Countries with the Fewest Overnight Visitors | 0 | - | 4.78 | 41,596 |
| Word Scramble - European Countries | 0 | - | 4.70 | 140,936 |
| Top 20 Football Clubs in Europe | 0 | - | 4.48 | 112,889 |
| Slavic Languages | 0 | - | 4.67 | 53,947 |
| Word Chain - France | 0 | - | 4.38 | 42,570 |
| Capitals of Italian Regions | 0 | - | 4.62 | 36,420 |
| Italian Foods | 0 | - | 4.30 | 72,136 |
| The Mafia Quiz | 0 | - | 4.46 | 23,195 |
| History of The Netherlands | 0 | - | 4.46 | 17,302 |
| Spanish Immigration by Country | 0 | - | 4.63 | 55,234 |
| Canary Islands | 0 | - | 4.61 | 17,390 |
| Switzerland Immigration by Country | 0 | - | 4.70 | 29,108 |
| British Spellings | 0 | - | 4.07 | 99,195 |
| British Groups of Things | 0 | - | 4.25 | 82,659 |
| British Acronyms | 0 | - | 4.39 | 45,608 |
| United Kingdom Decoder | 0 | - | 4.29 | 39,942 |
| Geography of Scotland | 0 | - | 4.63 | 21,468 |
| 100 Longest Rivers in Europe - with a Map | 0 | - | 4.94 | 64,763 |
| Countries With the Most Russian Speakers | 0 | - | 4.97 | 98,262 |
| French Geography Quiz #1 | 0 | - | 4.89 | 34,499 |
| History of Spain | 0 | - | 4.29 | 20,992 |
| British to American Word Translation | 0 | - | 3.74 | 253,283 |
| British Foods by Description | 0 | - | 3.94 | 48,226 |
| British and American Word Differences | 0 | - | 2.67 | 45,908 |
| British Geography Quiz #2 | 0 | - | 4.29 | 27,498 |
| Bridges of London | 0 | - | 4.17 | 10,061 |
| British Sport Trivia | 0 | - | 4.37 | 20,353 |
| Famous Welsh People | 0 | - | 4.21 | 9,768 |
| African Countries by First 2 Letters | 0 | - | 4.96 | 266,392 |
| History of Russia Quiz | 0 | - | 4.49 | 31,781 |
| Russia Multiple Choice | 0 | - | 4.58 | 40,552 |
| Famous French People | 0 | - | 4.12 | 27,901 |
| Movies Set in France | 0 | - | 4.26 | 13,068 |
| French Inventions | 0 | - | 4.08 | 13,862 |
| History of Paris | 0 | - | 4.24 | 13,612 |
| The Trojan War | 0 | - | 4.83 | 39,403 |
| Greek Mythology General Knowledge #1 | 0 | - | 4.85 | 110,427 |
| Word Chain - Italy | 0 | - | 4.07 | 23,083 |
| Embarrassing Chapters in Italian History | 0 | - | 4.24 | 12,034 |
| Ancient Roman Trivia #1 | 0 | - | 4.85 | 84,005 |
| Roman Emperors | 0 | - | 4.95 | 118,356 |
| Famous Nordic People | 0 | - | 4.34 | 19,830 |
| Famous Spaniards Quiz | 0 | - | 4.24 | 11,540 |
| Invasions of Great Britain | 0 | - | 4.51 | 59,368 |
| Word Chain - United Kingdom | 0 | - | 4.05 | 29,233 |
| The British Royal Family - Modern Times | 0 | - | 4.16 | 21,454 |
| People on Money - England | 0 | - | 4.29 | 16,560 |
| Name a Valid English City | 0 | - | 4.19 | 16,624 |
| English Monarchs in Order by First Letter | 0 | - | 4.38 | 31,298 |
| Asian Countries by First 2 Letters | 0 | - | 4.91 | 276,999 |
| Australian Capitals | 0 | - | 4.92 | 62,586 |
| European Geography By Letter - A | 0 | - | 4.56 | 132,335 |
| European Geography By Letter - B #1 | 0 | - | 4.67 | 110,841 |
| European Geography By Letter - C | 0 | - | 4.46 | 111,776 |
| European Geography By Letter - D | 0 | - | 4.50 | 106,648 |
| European Geography By Letter - L | 0 | - | 4.52 | 112,170 |
| European Geography By Letter - M | 0 | - | 4.61 | 128,808 |
| European Geography By Letter - N | 0 | - | 4.44 | 99,632 |
| European Geography By Letter - R | 0 | - | 4.42 | 92,594 |
| European Geography By Letter - V | 0 | - | 4.43 | 91,997 |
| European Geography By Letter - T | 0 | - | 4.41 | 81,258 |
| Europe Map Quiz | 0 | - | 5.00 | 4,728,760 |
| Europe Geography Quiz #1 | 0 | - | 4.54 | 70,971 |
| Europe Geography Quiz #2 | 0 | - | 4.57 | 71,596 |
| Europe Geography Quiz #4 | 0 | - | 4.57 | 69,920 |
| Europe Geography Quiz #5 | 0 | - | 4.54 | 60,962 |
| European Geography By Letter - S #1 | 0 | - | 4.63 | 99,564 |
| Top 10 European Countries by English Proficiency | 0 | - | 4.74 | 65,352 |
| Four Letter European Geography #1 | 0 | - | 4.44 | 27,106 |
| Four Letter European Geography #2 | 0 | - | 4.57 | 19,587 |
| Capitals of French Regions | 0 | - | 4.45 | 15,980 |
| German Loan Words | 0 | - | 4.27 | 135,435 |
| Olympian Gods Quiz | 0 | - | 4.96 | 495,314 |
| Ancient Greek Words | 0 | - | 4.92 | 110,606 |
| Name Every Beatles Song | 0 | - | 4.97 | 233,918 |
| Bohemian Rhapsody Lyrics | 0 | - | 4.98 | 290,242 |
| Africa Map Quiz | 0 | - | 5.00 | 2,103,249 |
| Oceania Map Quiz | 0 | - | 4.98 | 634,773 |
| European Physical Geography | 0 | - | 4.26 | 33,368 |
| Geography of Russia | 0 | - | 4.57 | 21,419 |
| Slovakia... or Slovenia? | 0 | - | 4.69 | 41,759 |
| German History A-Z | 0 | - | 4.49 | 24,194 |
| Roman Numeral Decoding Quiz | 0 | - | 4.94 | 433,265 |
| Two Letter Roman Numerals | 0 | - | 4.97 | 55,576 |
| Sweden Immigration by Country | 0 | - | 4.55 | 55,667 |
| United Kingdom A-Z | 0 | - | 4.53 | 87,181 |
| The Thirteen Dwarves in the Hobbit | 0 | - | 4.81 | 28,384 |
| Wives of King Henry VIII | 0 | - | 4.55 | 53,158 |
| Countries the UK Declared War On | 0 | - | 4.61 | 121,724 |
| Geography of the British Empire | 0 | - | 4.48 | 39,465 |
| Champions League Top 4 | 0 | - | 4.77 | 133,614 |
| East Asia Map Quiz | 0 | - | 4.99 | 1,438,562 |
| Asia Map Quiz | 0 | - | 4.99 | 906,268 |
| Japanese Language - Katakana Practice | 0 | - | 4.61 | 32,520 |
| Countries of Africa | 0 | - | 5.00 | 2,505,676 |
| Landlocked Countries in Africa | 0 | - | 4.99 | 45,757 |
| African East Coast | 0 | - | 4.96 | 94,970 |
| Western Africa Map Quiz | 0 | - | 4.97 | 72,844 |
| Oceanian Capitals - Map Quiz | 0 | - | 4.95 | 49,742 |
| Australia Map Quiz | 0 | - | 4.94 | 342,323 |
| United States Map Quiz | 0 | - | 4.98 | 4,140,334 |
| Top 10 Non-English Languages of Los Angeles | 0 | - | 4.42 | 59,572 |
| Mediterranean Countries Quiz | 0 | - | 4.99 | 209,946 |
| Countries with Territorial Claims in Antarctica | 0 | - | 4.94 | 92,165 |
| Countries That Use the Euro | 0 | - | 4.96 | 102,821 |
| Europe Cities Map Quiz | 0 | - | 4.99 | 362,149 |
| European Geography By Letter - E | 0 | - | 4.23 | 112,161 |
| European Geography By Letter - F | 0 | - | 4.17 | 91,404 |
| European Geography By Letter - H | 0 | - | 4.30 | 94,846 |
| European Geography By Letter - G | 0 | - | 4.25 | 101,226 |
| European Geography By Letter - I | 0 | - | 4.10 | 94,441 |
| European Geography By Letter - K | 0 | - | 4.14 | 69,117 |
| European Geography By Letter - O | 0 | - | 4.28 | 61,894 |
| European Geography by Letter - W | 0 | - | 4.20 | 82,273 |
| Europe Geography Quiz #3 | 0 | - | 4.34 | 63,382 |
| European Geography By Letter - S #2 | 0 | - | 4.19 | 50,483 |
| 10 Easternmost Countries in Europe | 0 | - | 4.89 | 113,412 |
| European Geography A-Z | 0 | - | 4.28 | 48,972 |
| Country Codes of Europe | 0 | - | 3.46 | 13,649 |
| The Only European Country ... | 0 | - | 4.91 | 213,608 |
