| European Countries by First 2 Letters | 0 | - | 4.95 | 532,975 |
| Count to 10 in Europe: Pro | 0 | - | 4.86 | 69,839 |
| Official European Union Languages | 0 | - | 4.97 | 240,274 |
| European Countries in their Native Language | 0 | - | 4.99 | 158,788 |
| Europe by Borders in 30 Seconds | 0 | - | 4.98 | 431,342 |
| Europe Geography Decoder | 0 | - | 4.87 | 70,373 |
| Countries that Beat Switzerland | 0 | - | 4.88 | 42,094 |
| Letters of the Greek Alphabet | 0 | - | 4.97 | 652,772 |
| Name that Greek Letter | 0 | - | 4.93 | 325,209 |
| Celtic Nations | 0 | - | 4.61 | 47,125 |
| Top European Languages on a Map | 0 | - | 4.77 | 132,987 |
| Add A Letter - Make a European City | 0 | - | 4.88 | 23,534 |
| Top 10 Languages Spoken in Europe | 0 | - | 4.96 | 221,197 |
| Most Guessed Cities in Europe - Not Capitals | 0 | - | 4.83 | 88,122 |
| Countries of Europe with an Empty Map | 0 | - | 5.00 | 313,107 |
| All First-Level Subdivisions of Europe on a Map | 0 | - | 4.99 | 176,405 |
| Germany Multiple Choice | 0 | - | 4.84 | 54,741 |
| States of the German Confederation in 1848 | 0 | - | 4.90 | 32,507 |
| "Big Five" European Soccer Champions Since 2000 | 0 | - | 4.97 | 362,492 |
| Top Asian Languages on a Map | 0 | - | 4.95 | 72,196 |
| Top African Languages on a Map | 0 | - | 4.94 | 75,447 |
| European Geography By Letter - P #1 | 0 | - | 4.81 | 99,083 |
| Catholic Countries in Europe | 0 | - | 4.83 | 95,880 |
| Biggest Countries in Europe in 1700 | 0 | - | 4.73 | 58,808 |
| European Geography By Letter - B #2 | 0 | - | 4.86 | 89,053 |
| Category Elimination - European Geography #3 | 0 | - | 4.86 | 82,145 |
| Federal Subjects of Russia | 0 | - | 4.95 | 149,879 |
| States of Germany | 0 | - | 4.95 | 154,888 |
| Germany Immigration by Country | 0 | - | 4.86 | 81,791 |
| Regions of Italy | 0 | - | 4.92 | 77,239 |
| Netherlands Immigration by Country | 0 | - | 4.93 | 52,898 |
| Regions of Spain Quiz | 0 | - | 4.90 | 115,547 |
| Cantons of Switzerland | 0 | - | 4.98 | 51,880 |
| American to British Word Translation | 0 | - | 4.14 | 139,804 |
| Languages of the United Kingdom | 0 | - | 4.14 | 41,088 |
| 10 Closest Megacities to London | 0 | - | 4.90 | 17,860 |
| Champions League Winners | 0 | - | 4.92 | 1,017,674 |
| Top 10 Non-English Languages Spoken in New York City | 0 | - | 4.85 | 66,807 |
| Pre-Euro Currencies | 0 | - | 4.44 | 52,771 |
| European Countries with the Fewest Overnight Visitors | 0 | - | 4.80 | 41,740 |
| Word Scramble - European Countries | 0 | - | 4.73 | 142,431 |
| Top 20 Football Clubs in Europe | 0 | - | 4.48 | 123,777 |
| Category Elimination - European Geography #1 | 0 | - | 4.98 | 236,261 |
| European Map without 10 Random Countries | 0 | - | 4.97 | 279,260 |
| Category Elimination - European Geography #2 | 0 | - | 4.99 | 169,205 |
| Slavic Languages | 0 | - | 4.67 | 54,772 |
| Departments of France | 0 | - | 4.93 | 55,367 |
| Capitals of Italian Regions | 0 | - | 4.62 | 36,756 |
| Countries Surrounding Rome | 0 | - | 4.97 | 49,774 |
| Spanish Immigration by Country | 0 | - | 4.63 | 55,664 |
| British Spellings | 0 | - | 4.06 | 99,624 |
| England or Wales? | 0 | - | 4.94 | 46,012 |
| All UEFA Champions League Teams Ever | 0 | - | 4.85 | 132,413 |
| Countries with the Most Arabic Speakers | 0 | - | 4.92 | 80,920 |
| English Words of Arabic Origin | 0 | - | 4.54 | 49,913 |
| 100 Longest Rivers in Europe - with a Map | 0 | - | 4.94 | 66,036 |
| Countries With the Most Russian Speakers | 0 | - | 4.97 | 103,199 |
| French Geography Quiz #1 | 0 | - | 4.89 | 35,208 |
| Languages of Spain | 0 | - | 4.36 | 23,466 |
| British to American Word Translation | 0 | - | 3.74 | 255,394 |
| British Foods by Description | 0 | - | 3.94 | 48,405 |
| British and American Word Differences | 0 | - | 2.63 | 46,938 |
| Asian Countries by First 2 Letters | 0 | - | 4.91 | 280,951 |
| African Countries by First 2 Letters | 0 | - | 4.96 | 269,620 |
| History of Russia Quiz | 0 | - | 4.47 | 32,022 |
| Russia Multiple Choice | 0 | - | 4.58 | 40,898 |
| History of Italy | 0 | - | 4.55 | 32,179 |
| Italy Multiple Choice | 0 | - | 4.74 | 104,505 |
| Geography of the Dutch Empire | 0 | - | 4.62 | 34,843 |
| Countries of the Spanish Empire | 0 | - | 4.52 | 77,465 |
| Europe Map Quiz | 0 | - | 5.00 | 4,792,531 |
| Capitals of French Regions | 0 | - | 4.45 | 16,194 |
| Capitals of German States | 0 | - | 4.74 | 29,093 |
| Chancellors of Germany, 1949–present | 0 | - | 4.60 | 23,579 |
| The Trojan War | 0 | - | 4.83 | 40,042 |
| Greek Mythology General Knowledge #1 | 0 | - | 4.85 | 113,139 |
| Ancient Roman Trivia #1 | 0 | - | 4.85 | 85,672 |
| Roman Emperors | 0 | - | 4.95 | 121,394 |
| Oceania Map Quiz | 0 | - | 4.98 | 660,185 |
| Australian Capitals | 0 | - | 4.92 | 62,860 |
| European Geography By Letter - A | 0 | - | 4.52 | 148,337 |
| European Geography By Letter - B #1 | 0 | - | 4.62 | 121,734 |
| European Geography By Letter - C | 0 | - | 4.44 | 124,240 |
| European Geography By Letter - D | 0 | - | 4.49 | 118,683 |
| European Geography By Letter - L | 0 | - | 4.52 | 115,261 |
| European Geography By Letter - M | 0 | - | 4.69 | 132,770 |
| European Geography By Letter - N | 0 | - | 4.44 | 102,276 |
| European Geography By Letter - R | 0 | - | 4.43 | 94,883 |
| European Geography By Letter - V | 0 | - | 4.43 | 94,163 |
| European Geography By Letter - T | 0 | - | 4.41 | 83,774 |
| Europe Geography Quiz #1 | 0 | - | 4.55 | 71,560 |
| Europe Geography Quiz #2 | 0 | - | 4.57 | 72,233 |
| Europe Geography Quiz #4 | 0 | - | 4.57 | 70,502 |
| Europe Geography Quiz #5 | 0 | - | 4.55 | 61,460 |
| European Geography By Letter - S #1 | 0 | - | 4.63 | 101,558 |
| Top 10 European Countries by English Proficiency | 0 | - | 4.74 | 66,031 |
| Regions of France | 0 | - | 4.70 | 122,354 |
| France Immigration by Country | 0 | - | 4.70 | 77,000 |
| German Loan Words | 0 | - | 4.27 | 141,190 |
| Famous Germans | 0 | - | 4.50 | 55,859 |
| German Groups of Things | 0 | - | 4.47 | 38,663 |
| Germany True or False? | 0 | - | 4.61 | 49,060 |
| Largest Islands of Greece | 0 | - | 4.59 | 48,563 |
| Olympian Gods Quiz | 0 | - | 4.96 | 504,307 |
| Famous Italians by Clue | 0 | - | 4.45 | 90,524 |
| Provinces of the Netherlands | 0 | - | 4.80 | 41,911 |
| 100 Greatest Britons Quiz | 0 | - | 4.41 | 48,430 |
| Foods in a Full English Breakfast | 0 | - | 4.46 | 103,936 |
| East Asia Map Quiz | 0 | - | 4.99 | 1,453,270 |
| Asia Map Quiz | 0 | - | 4.99 | 926,527 |
| Africa Map Quiz | 0 | - | 5.00 | 2,130,511 |
| Elemental Words | 0 | - | 4.97 | 52,601 |
| Mythical Creatures Quiz #1 | 0 | - | 4.92 | 710,618 |
| Oceanian Capitals - Map Quiz | 0 | - | 4.96 | 51,584 |
| Mediterranean Countries Quiz | 0 | - | 4.99 | 214,283 |
| Countries with Territorial Claims in Antarctica | 0 | - | 4.94 | 92,976 |
| Countries That Use the Euro | 0 | - | 4.95 | 107,163 |
| European Physical Geography | 0 | - | 4.26 | 33,615 |
| 10 Easternmost Countries in Europe | 0 | - | 4.87 | 117,442 |
| Country Codes of Europe | 0 | - | 3.45 | 13,845 |
| The Only European Country ... | 0 | - | 4.91 | 219,513 |
| European Countries NOT in NATO | 0 | - | 4.91 | 62,793 |
| Geography of Russia | 0 | - | 4.57 | 21,615 |
| Slovakia... or Slovenia? | 0 | - | 4.69 | 42,157 |
| History of Austria | 0 | - | 4.70 | 17,991 |
| Presidents of France | 0 | - | 4.25 | 24,368 |
| Geography of the French Empire | 0 | - | 4.45 | 27,229 |
| The French Revolution | 0 | - | 4.47 | 24,165 |
| France Multiple Choice | 0 | - | 4.39 | 40,874 |
| History of France | 0 | - | 4.61 | 57,714 |
| Biggest Cities in Germany in 1910 | 0 | - | 4.41 | 23,573 |
| Ancient Greek Words | 0 | - | 4.93 | 112,629 |
| Two Letter Roman Numerals | 0 | - | 4.97 | 56,595 |
| The Vikings! | 0 | - | 4.46 | 28,419 |
| Sweden Immigration by Country | 0 | - | 4.53 | 56,435 |
| The Portuguese Empire | 0 | - | 4.58 | 12,116 |
| Kings of Spain Quiz | 0 | - | 4.14 | 14,130 |
| United Kingdom A-Z | 0 | - | 4.51 | 88,424 |
| The Thirteen Dwarves in the Hobbit | 0 | - | 4.81 | 28,844 |
| Name Every Beatles Song | 0 | - | 4.97 | 238,640 |
| Bohemian Rhapsody Lyrics | 0 | - | 4.98 | 292,962 |
| Champions League Top 4 | 0 | - | 4.78 | 139,508 |
| South and Central Asia Map Quiz | 0 | - | 4.94 | 100,130 |
| Japanese Language - Katakana Practice | 0 | - | 4.61 | 33,440 |
| Landlocked Countries in Africa | 0 | - | 4.99 | 48,222 |
| African East Coast | 0 | - | 4.96 | 96,911 |
| Western Africa Map Quiz | 0 | - | 4.98 | 74,789 |
| Country Name Etymologies #1 | 0 | - | 4.97 | 159,601 |
| Country Name Etymologies #2 | 0 | - | 4.96 | 87,097 |
| Capitals in their Native Languages | 0 | - | 4.95 | 133,977 |
| Australia Map Quiz | 0 | - | 4.95 | 346,444 |
| United States Map Quiz | 0 | - | 4.98 | 4,173,241 |
| Things Named For People #2 - U.S. Centric | 0 | - | 4.21 | 52,740 |
| Top 10 Non-English Languages of Los Angeles | 0 | - | 4.43 | 60,153 |
| Europe Cities Map Quiz | 0 | - | 4.99 | 366,520 |
| European Geography By Letter - E | 0 | - | 4.23 | 115,388 |
| European Geography By Letter - F | 0 | - | 4.15 | 94,638 |
| European Geography By Letter - H | 0 | - | 4.30 | 97,336 |
| European Geography By Letter - G | 0 | - | 4.27 | 104,110 |
| European Geography By Letter - I | 0 | - | 4.07 | 96,691 |
| European Geography By Letter - K | 0 | - | 4.15 | 71,335 |
| European Geography By Letter - O | 0 | - | 4.29 | 63,719 |
| European Geography by Letter - W | 0 | - | 4.21 | 83,688 |
| Europe Geography Quiz #3 | 0 | - | 4.35 | 63,933 |
| European Geography By Letter - S #2 | 0 | - | 4.20 | 51,990 |
| European Geography A-Z | 0 | - | 4.29 | 49,514 |
| Austria... or Australia? | 0 | - | 4.67 | 104,827 |
| Famous French People | 0 | - | 4.05 | 36,152 |
| Word Chain - France | 0 | - | 4.38 | 42,958 |
| Ancient Greek Trivia | 0 | - | 4.62 | 67,276 |
| Geography of Ancient Greece | 0 | - | 4.69 | 32,069 |
| Italian Foods | 0 | - | 4.30 | 73,376 |
| Countries Italy Declared War On | 0 | - | 4.74 | 47,970 |
| The Mafia Quiz | 0 | - | 4.46 | 23,450 |
| Roman Numeral Decoding Quiz | 0 | - | 4.94 | 440,313 |
| History of The Netherlands | 0 | - | 4.46 | 17,571 |
| Canary Islands | 0 | - | 4.62 | 17,549 |
| Switzerland Immigration by Country | 0 | - | 4.69 | 30,143 |
| British Groups of Things | 0 | - | 4.26 | 83,038 |
| British Acronyms | 0 | - | 4.40 | 45,959 |
| United Kingdom Decoder | 0 | - | 4.29 | 40,123 |
| British Monopoly Board | 0 | - | 4.52 | 41,292 |
| English Monarchs in Order by First Letter | 0 | - | 4.38 | 32,200 |
| Middle East Map Quiz | 0 | - | 4.99 | 1,387,925 |
| Countries of Africa | 0 | - | 5.00 | 2,564,046 |
| Australian States and Territories | 0 | - | 4.96 | 143,019 |
| Australian Immigration by Country | 0 | - | 4.81 | 77,538 |
| Australian Slang | 0 | - | 4.24 | 28,756 |
| Australia True or False | 0 | - | 4.86 | 57,199 |
| Flags of North and South America | 0 | - | 4.99 | 377,974 |
| 10 Biggest American Countries by Area | 0 | - | 4.95 | 113,071 |
| Top 10 Most Populous American Countries | 0 | - | 4.96 | 144,964 |
| Latin American Countries Map Quiz | 0 | - | 4.98 | 130,839 |
| South America Map Quiz | 0 | - | 5.00 | 1,558,190 |
| Uruguay Country Quiz | 0 | - | 4.84 | 31,782 |
| Countries of North America Quiz | 0 | - | 5.00 | 1,033,061 |
| North America Map Quiz | 0 | - | 4.98 | 252,661 |
| Third Most Common Language by U.S. State | 0 | - | 4.87 | 114,033 |
| Canada Provinces and Territories | 0 | - | 5.00 | 346,970 |
| Canada Provinces Map Quiz | 0 | - | 4.99 | 645,247 |
