| European Countries by First 2 Letters | 0 | - | 4.95 | 532,662 |
| European Geography By Letter - P #1 | 0 | - | 4.81 | 99,025 |
| Catholic Countries in Europe | 0 | - | 4.83 | 95,808 |
| European Geography By Letter - B #2 | 0 | - | 4.87 | 88,945 |
| Category Elimination - European Geography #3 | 0 | - | 4.86 | 82,024 |
| Category Elimination - European Geography #1 | 0 | - | 4.98 | 236,004 |
| Category Elimination - European Geography #2 | 0 | - | 4.99 | 169,022 |
| Countries With the Most Russian Speakers | 0 | - | 4.97 | 102,975 |
| Count to 10 in Europe: Pro | 0 | - | 4.86 | 69,773 |
| Official European Union Languages | 0 | - | 4.97 | 239,874 |
| European Countries in their Native Language | 0 | - | 4.99 | 158,706 |
| Europe by Borders in 30 Seconds | 0 | - | 4.98 | 431,050 |
| Letters of the Greek Alphabet | 0 | - | 4.97 | 652,248 |
| Name that Greek Letter | 0 | - | 4.93 | 325,078 |
| Europe Geography Decoder | 0 | - | 4.87 | 70,337 |
| Countries that Beat Switzerland | 0 | - | 4.88 | 42,065 |
| Ancient Greek Words | 0 | - | 4.93 | 112,531 |
| "Big Five" European Soccer Champions Since 2000 | 0 | - | 4.97 | 361,967 |
| Add A Letter - Make a European City | 0 | - | 4.90 | 23,513 |
| European Geography By Letter - A | 0 | - | 4.52 | 148,278 |
| European Geography By Letter - B #1 | 0 | - | 4.62 | 121,674 |
| European Geography By Letter - C | 0 | - | 4.44 | 124,134 |
| European Geography By Letter - D | 0 | - | 4.49 | 118,245 |
| European Geography By Letter - L | 0 | - | 4.52 | 115,197 |
| European Geography By Letter - M | 0 | - | 4.69 | 132,673 |
| European Geography By Letter - N | 0 | - | 4.44 | 102,225 |
| European Geography By Letter - R | 0 | - | 4.43 | 94,842 |
| European Geography By Letter - V | 0 | - | 4.43 | 94,126 |
| European Geography By Letter - T | 0 | - | 4.41 | 83,716 |
| European Geography By Letter - S #1 | 0 | - | 4.63 | 101,522 |
| Top 10 Languages Spoken in Europe | 0 | - | 4.96 | 220,954 |
| Most Guessed Cities in Europe - Not Capitals | 0 | - | 4.83 | 88,058 |
| Countries of Europe with an Empty Map | 0 | - | 5.00 | 312,898 |
| All First-Level Subdivisions of Europe on a Map | 0 | - | 4.99 | 176,034 |
| Russian History A-Z | 0 | - | 4.35 | 32,247 |
| Famous Germans | 0 | - | 4.50 | 55,812 |
| Germany Multiple Choice | 0 | - | 4.84 | 54,709 |
| States of the German Confederation in 1848 | 0 | - | 4.90 | 32,475 |
| Famous Italians by Clue | 0 | - | 4.45 | 90,427 |
| 100 Greatest Britons Quiz | 0 | - | 4.41 | 48,415 |
| Champions League Winners | 0 | - | 4.92 | 1,016,682 |
| U.S. Citizenship Test Questions | 0 | - | 4.83 | 240,856 |
| Celtic Nations | 0 | - | 4.61 | 47,106 |
| Monarchies of Europe | 0 | - | 4.90 | 98,920 |
| Federal Subjects of Russia | 0 | - | 4.95 | 149,628 |
| Countries That Border Russia | 0 | - | 4.98 | 464,618 |
| States of Germany | 0 | - | 4.95 | 154,642 |
| Germany Immigration by Country | 0 | - | 4.86 | 81,730 |
| Regions of Italy | 0 | - | 4.92 | 77,138 |
| Netherlands Immigration by Country | 0 | - | 4.93 | 52,826 |
| Regions of Spain Quiz | 0 | - | 4.90 | 115,408 |
| Cantons of Switzerland | 0 | - | 4.98 | 51,794 |
| United Kingdom A-Z | 0 | - | 4.51 | 88,391 |
| 10 Closest Megacities to London | 0 | - | 4.90 | 17,843 |
| Asian Geography By Letter - B | 0 | - | 4.85 | 67,068 |
| Monarchies of Asia | 0 | - | 4.97 | 71,531 |
| Asian Country Superlatives | 0 | - | 4.84 | 81,312 |
| Top 10 Richest Countries in the Americas | 0 | - | 4.94 | 95,391 |
| Top 10 Biggest Economies in the Americas | 0 | - | 4.94 | 92,878 |
| U.S. Cabinet Departments | 0 | - | 4.86 | 73,122 |
| Top 10 Non-English Languages Spoken in New York City | 0 | - | 4.85 | 66,756 |
| Deadliest U.S. Wars | 0 | - | 4.89 | 191,835 |
| European Geography By Letter - E | 0 | - | 4.23 | 115,333 |
| European Geography By Letter - F | 0 | - | 4.15 | 94,594 |
| European Geography By Letter - H | 0 | - | 4.30 | 97,299 |
| European Geography By Letter - G | 0 | - | 4.27 | 104,067 |
| European Geography By Letter - I | 0 | - | 4.07 | 96,658 |
| European Geography By Letter - K | 0 | - | 4.15 | 71,301 |
| European Geography By Letter - O | 0 | - | 4.29 | 63,684 |
| European Geography by Letter - W | 0 | - | 4.21 | 83,664 |
| European Geography By Letter - S #2 | 0 | - | 4.20 | 51,967 |
| Top 10 Coldest European Countries | 0 | - | 4.94 | 193,955 |
| Top 10 Hottest European Countries | 0 | - | 4.88 | 127,848 |
| European Geography A-Z | 0 | - | 4.29 | 49,491 |
| Biggest Countries in Europe in 1700 | 0 | - | 4.73 | 58,766 |
| 100 Longest Rivers in Europe - with a Map | 0 | - | 4.94 | 65,980 |
| European Map without 10 Random Countries | 0 | - | 4.97 | 279,014 |
| Countries that Border Poland | 0 | - | 4.99 | 173,218 |
| Russia Country Quiz | 0 | - | 4.83 | 115,350 |
| Countries Bordering Serbia | 0 | - | 4.96 | 93,123 |
| French Geography Quiz #1 | 0 | - | 4.89 | 35,105 |
| Famous French People | 0 | - | 4.05 | 36,122 |
| Departments of France | 0 | - | 4.93 | 55,231 |
| Countries With the Most German Speakers | 0 | - | 4.89 | 98,783 |
| The Mafia Quiz | 0 | - | 4.46 | 23,441 |
| Countries Surrounding Rome | 0 | - | 4.97 | 49,753 |
| History of The Netherlands | 0 | - | 4.46 | 17,556 |
| British Acronyms | 0 | - | 4.40 | 45,949 |
| British Monopoly Board | 0 | - | 4.52 | 41,276 |
| English Monarchs in Order by First Letter | 0 | - | 4.38 | 32,155 |
| Name the English Monarchs | 0 | - | 4.91 | 506,817 |
| England or Wales? | 0 | - | 4.94 | 45,984 |
| All UEFA Champions League Teams Ever | 0 | - | 4.85 | 132,247 |
| Top 10 Coldest Asian Countries | 0 | - | 4.95 | 123,777 |
| Category Elimination - Asian Geography #1 | 0 | - | 4.86 | 111,412 |
| Category Elimination - Asian Geography #2 | 0 | - | 4.94 | 97,781 |
| Countries with the Most Arabic Speakers | 0 | - | 4.92 | 80,851 |
| Category Elimination - African Geography #1 | 0 | - | 4.90 | 93,480 |
| Pre-Euro Currencies | 0 | - | 4.44 | 52,755 |
| European Countries with the Fewest Overnight Visitors | 0 | - | 4.80 | 41,724 |
| Word Scramble - European Countries | 0 | - | 4.73 | 142,362 |
| Top 20 Football Clubs in Europe | 0 | - | 4.48 | 122,708 |
| Name a Major European City A-Z | 0 | - | 4.33 | 49,871 |
| Slavic Languages | 0 | - | 4.67 | 54,714 |
| Countries that Bordered the USSR | 0 | - | 4.93 | 166,510 |
| Countries that Beat Russia | 0 | - | 4.81 | 83,648 |
| France A-Z | 0 | - | 4.16 | 38,346 |
| The Trojan War | 0 | - | 4.83 | 40,006 |
| Greek Mythology General Knowledge #1 | 0 | - | 4.85 | 113,021 |
| Capitals of Italian Regions | 0 | - | 4.62 | 36,747 |
| Ancient Roman Trivia #1 | 0 | - | 4.85 | 85,616 |
| Roman Emperors | 0 | - | 4.95 | 121,280 |
| Spanish Immigration by Country | 0 | - | 4.63 | 55,638 |
| Random Sequential Oceanic Countries on a Map | 0 | - | 4.97 | 27,431 |
| Countries Closest to United States A-Z | 0 | - | 4.82 | 118,752 |
| Top 10 Coldest U.S. States | 0 | - | 4.94 | 125,911 |
| Top 10 Hottest U.S. States | 0 | - | 4.86 | 126,565 |
| Top 10 U.S. States with the Least Precipitation | 0 | - | 4.83 | 62,233 |
| Top European Languages on a Map | 0 | - | 4.77 | 132,889 |
| History of Russia Quiz | 0 | - | 4.47 | 32,009 |
| Russia Multiple Choice | 0 | - | 4.58 | 40,882 |
| Kings of France Quiz | 0 | - | 4.21 | 32,937 |
| German Loan Words | 0 | - | 4.27 | 141,039 |
| Ancient Greece A-Z | 0 | - | 4.60 | 23,245 |
| Olympian Gods Quiz | 0 | - | 4.96 | 503,926 |
| Famous Irish People | 0 | - | 4.05 | 46,071 |
| History of Italy | 0 | - | 4.55 | 32,160 |
| Italy Multiple Choice | 0 | - | 4.74 | 104,410 |
| Geography of the Dutch Empire | 0 | - | 4.62 | 34,830 |
| Famous Spaniards Quiz | 0 | - | 4.24 | 11,645 |
| Countries of the Spanish Empire | 0 | - | 4.52 | 77,434 |
| The British Royal Family - Modern Times | 0 | - | 4.16 | 21,580 |
| People on Money - England | 0 | - | 4.29 | 16,647 |
| British Geography A-Z | 0 | - | 4.42 | 19,616 |
| Name Every Beatles Song | 0 | - | 4.97 | 238,436 |
| Bohemian Rhapsody Lyrics | 0 | - | 4.98 | 292,851 |
| London A-Z | 0 | - | 4.10 | 40,882 |
| Zone 1 London Underground Stations - With a Map | 0 | - | 4.90 | 52,796 |
| Major non-NATO U.S. Allies | 0 | - | 4.52 | 52,542 |
| Europe Map Quiz | 0 | - | 5.00 | 4,789,675 |
| Europe Geography Quiz #1 | 0 | - | 4.55 | 71,538 |
| Europe Geography Quiz #2 | 0 | - | 4.57 | 72,201 |
| Europe Geography Quiz #4 | 0 | - | 4.57 | 70,473 |
| Europe Geography Quiz #5 | 0 | - | 4.55 | 61,438 |
| Top 10 European Countries by English Proficiency | 0 | - | 4.74 | 66,002 |
| European Secessionist Movements on a Map | 0 | - | 4.53 | 35,203 |
| Four Letter European Geography #1 | 0 | - | 4.41 | 28,561 |
| Capitals of French Regions | 0 | - | 4.45 | 16,185 |
| Regions of France | 0 | - | 4.70 | 122,175 |
| France Immigration by Country | 0 | - | 4.70 | 76,957 |
| German Groups of Things | 0 | - | 4.47 | 38,645 |
| Capitals of German States | 0 | - | 4.74 | 29,076 |
| Chancellors of Germany, 1949–present | 0 | - | 4.60 | 23,552 |
| Germany True or False? | 0 | - | 4.61 | 49,032 |
| German History A-Z | 0 | - | 4.49 | 24,924 |
| Largest Islands of Greece | 0 | - | 4.59 | 48,511 |
| Roman Numeral Decoding Quiz | 0 | - | 4.94 | 439,980 |
| Two Letter Roman Numerals | 0 | - | 4.97 | 56,534 |
| Provinces of the Netherlands | 0 | - | 4.80 | 41,806 |
| Foods in a Full English Breakfast | 0 | - | 4.46 | 103,857 |
| The Thirteen Dwarves in the Hobbit | 0 | - | 4.81 | 28,826 |
| Famous Scottish People | 0 | - | 4.22 | 18,442 |
| Asian Geography By Letter - A | 0 | - | 4.64 | 71,487 |
| Asian Geography by Letter - H | 0 | - | 4.50 | 66,095 |
| Asian Geography By Letter - M | 0 | - | 4.48 | 61,685 |
| Asian Geography by Letter - P | 0 | - | 4.45 | 58,236 |
| Asian Geography by Letter - T | 0 | - | 4.52 | 57,680 |
| Asian Countries by First 2 Letters | 0 | - | 4.92 | 280,802 |
| Asian Geography By Letter - L | 0 | - | 4.49 | 43,335 |
| Asian Geography By Letter - O | 0 | - | 4.66 | 32,334 |
| African Countries by First 2 Letters | 0 | - | 4.96 | 269,476 |
| Oceania Map Quiz | 0 | - | 4.98 | 659,716 |
| Australian Capitals | 0 | - | 4.92 | 62,839 |
| U.S. Geography by Letter - B | 0 | - | 4.54 | 70,072 |
| U.S. Geography by Letter - S | 0 | - | 4.55 | 58,010 |
| United States Map Quiz | 0 | - | 4.98 | 4,172,076 |
| Two Letter U.S. State Abbreviations | 0 | - | 4.19 | 749,949 |
| Top 10 Non-English Languages of Los Angeles | 0 | - | 4.43 | 60,130 |
| European Physical Geography | 0 | - | 4.26 | 33,601 |
| Europe Geography Quiz #3 | 0 | - | 4.35 | 63,906 |
| Albania Country Quiz | 0 | - | 4.54 | 39,268 |
| Geography of Russia | 0 | - | 4.57 | 21,607 |
| Countries Invaded by the USSR | 0 | - | 4.29 | 94,447 |
| Slovakia... or Slovenia? | 0 | - | 4.69 | 42,139 |
| Serbia Country Quiz | 0 | - | 4.44 | 35,227 |
| History of Austria | 0 | - | 4.70 | 17,978 |
| Austria... or Australia? | 0 | - | 4.67 | 104,782 |
| Geography of the French Empire | 0 | - | 4.45 | 27,221 |
| Word Chain - France | 0 | - | 4.38 | 42,946 |
| The French Revolution | 0 | - | 4.47 | 24,152 |
| France Multiple Choice | 0 | - | 4.39 | 40,857 |
| History of France | 0 | - | 4.61 | 57,656 |
| Biggest Cities in Germany in 1910 | 0 | - | 4.41 | 23,563 |
| Ancient Greek Trivia | 0 | - | 4.62 | 67,249 |
| Geography of Ancient Greece | 0 | - | 4.69 | 32,053 |
| Figures from Greek Mythology | 0 | - | 4.91 | 188,964 |
| Italian Foods | 0 | - | 4.30 | 73,302 |
| Italian History A-Z | 0 | - | 4.16 | 17,942 |
| Countries Italy Declared War On | 0 | - | 4.70 | 45,975 |
| Byzantine History | 0 | - | 4.91 | 29,030 |
