| Pre-Euro Currencies | 0 | - | 4.44 | 52,809 |
| European Countries by First 2 Letters | 0 | - | 4.95 | 533,226 |
| Most Guessed Cities in Europe - Not Capitals | 0 | - | 4.83 | 88,166 |
| Save Europeans by Guessing Countries | 0 | - | 4.86 | 217,567 |
| European Geography By Letter - P #1 | 0 | - | 4.81 | 99,213 |
| European Geography By Letter - B #2 | 0 | - | 4.87 | 89,249 |
| Category Elimination - European Geography #3 | 0 | - | 4.86 | 82,229 |
| Count to 10 in Europe: Pro | 0 | - | 4.86 | 69,885 |
| Official European Union Languages | 0 | - | 4.97 | 240,439 |
| European Countries in their Native Language | 0 | - | 4.99 | 158,872 |
| Europe by Borders in 30 Seconds | 0 | - | 4.98 | 431,538 |
| Europe Geography Decoder | 0 | - | 4.87 | 70,410 |
| Countries that Beat Switzerland | 0 | - | 4.88 | 42,120 |
| People on Money by Country | 0 | - | 4.83 | 60,837 |
| Celtic Nations | 0 | - | 4.61 | 47,130 |
| Countries of Europe with an Empty Map | 0 | - | 5.00 | 313,316 |
| All First-Level Subdivisions of Europe on a Map | 0 | - | 4.99 | 176,729 |
| Germany Multiple Choice | 0 | - | 4.84 | 54,772 |
| States of the German Confederation in 1848 | 0 | - | 4.90 | 32,527 |
| "Big Five" European Soccer Champions Since 2000 | 0 | - | 4.97 | 362,988 |
| Add A Letter - Make a European City | 0 | - | 4.88 | 23,540 |
| World Currency Quiz | 0 | - | 4.92 | 307,818 |
| European Geography By Letter - A | 0 | - | 4.52 | 148,490 |
| European Geography By Letter - B #1 | 0 | - | 4.62 | 121,934 |
| European Geography By Letter - C | 0 | - | 4.44 | 124,471 |
| European Geography By Letter - D | 0 | - | 4.49 | 119,013 |
| European Geography By Letter - L | 0 | - | 4.52 | 115,430 |
| European Geography By Letter - M | 0 | - | 4.69 | 132,964 |
| European Geography By Letter - N | 0 | - | 4.44 | 102,383 |
| European Geography By Letter - R | 0 | - | 4.43 | 94,969 |
| European Geography By Letter - V | 0 | - | 4.43 | 94,239 |
| European Geography By Letter - T | 0 | - | 4.41 | 83,881 |
| European Geography By Letter - S #1 | 0 | - | 4.63 | 101,623 |
| Famous Germans | 0 | - | 4.50 | 55,893 |
| Famous Italians by Clue | 0 | - | 4.45 | 90,579 |
| U.S. Citizenship Test Questions | 0 | - | 4.83 | 241,024 |
| Catholic Countries in Europe | 0 | - | 4.83 | 95,930 |
| Biggest Countries in Europe in 1700 | 0 | - | 4.74 | 58,838 |
| Federal Subjects of Russia | 0 | - | 4.95 | 150,016 |
| States of Germany | 0 | - | 4.95 | 155,024 |
| Germany Immigration by Country | 0 | - | 4.86 | 81,852 |
| Regions of Italy | 0 | - | 4.92 | 77,307 |
| Netherlands Immigration by Country | 0 | - | 4.93 | 52,955 |
| Regions of Spain Quiz | 0 | - | 4.90 | 115,661 |
| Cantons of Switzerland | 0 | - | 4.98 | 51,932 |
| United Kingdom A-Z | 0 | - | 4.51 | 88,497 |
| People on Money - England | 0 | - | 4.29 | 21,005 |
| 10 Closest Megacities to London | 0 | - | 4.90 | 17,878 |
| Champions League Winners | 0 | - | 4.92 | 1,018,538 |
| Asian Geography By Letter - B | 0 | - | 4.85 | 67,162 |
| Category Elimination - European Geography #1 | 0 | - | 4.98 | 236,476 |
| European Map without 10 Random Countries | 0 | - | 4.97 | 279,442 |
| Category Elimination - European Geography #2 | 0 | - | 4.99 | 169,382 |
| Departments of France | 0 | - | 4.93 | 55,455 |
| Countries Surrounding Rome | 0 | - | 4.97 | 49,793 |
| England or Wales? | 0 | - | 4.94 | 46,089 |
| All UEFA Champions League Teams Ever | 0 | - | 4.85 | 132,570 |
| European Geography By Letter - E | 0 | - | 4.23 | 121,063 |
| European Geography By Letter - F | 0 | - | 4.15 | 94,816 |
| European Geography By Letter - H | 0 | - | 4.30 | 97,480 |
| European Geography By Letter - G | 0 | - | 4.27 | 104,272 |
| European Geography By Letter - I | 0 | - | 4.07 | 96,811 |
| European Geography By Letter - K | 0 | - | 4.15 | 71,462 |
| European Geography By Letter - O | 0 | - | 4.29 | 63,810 |
| European Geography by Letter - W | 0 | - | 4.21 | 83,744 |
| European Geography By Letter - S #2 | 0 | - | 4.20 | 52,048 |
| European Geography A-Z | 0 | - | 4.29 | 49,533 |
| European Countries with the Fewest Overnight Visitors | 0 | - | 4.80 | 41,742 |
| Word Scramble - European Countries | 0 | - | 4.73 | 142,481 |
| Top 20 Football Clubs in Europe | 0 | - | 4.48 | 124,531 |
| Slavic Languages | 0 | - | 4.67 | 54,800 |
| Famous French People | 0 | - | 4.05 | 36,189 |
| Capitals of Italian Regions | 0 | - | 4.62 | 36,765 |
| The Mafia Quiz | 0 | - | 4.46 | 23,454 |
| History of The Netherlands | 0 | - | 4.46 | 17,580 |
| Spanish Immigration by Country | 0 | - | 4.63 | 55,671 |
| English Monarchs in Order by First Letter | 0 | - | 4.38 | 32,234 |
| Currencies by $ymbol | 0 | - | 4.56 | 33,615 |
| Name a Major European City A-Z | 0 | - | 4.33 | 49,943 |
| 100 Longest Rivers in Europe - with a Map | 0 | - | 4.94 | 66,088 |
| French Geography Quiz #1 | 0 | - | 4.89 | 35,318 |
| Famous Swiss and Austrian People | 0 | - | 4.45 | 14,687 |
| Famous Dutch and Belgian People | 0 | - | 4.56 | 18,168 |
| France A-Z | 0 | - | 4.16 | 38,370 |
| Letters of the Greek Alphabet | 0 | - | 4.97 | 653,294 |
| Name that Greek Letter | 0 | - | 4.93 | 325,383 |
| Switzerland A-Z | 0 | - | 4.45 | 25,802 |
| Top European Languages on a Map | 0 | - | 4.77 | 133,050 |
| Famous Russians | 0 | - | 4.16 | 23,935 |
| History of Russia Quiz | 0 | - | 4.47 | 32,031 |
| Russia Multiple Choice | 0 | - | 4.58 | 40,910 |
| Russian History A-Z | 0 | - | 4.35 | 32,324 |
| Country Quiz on a Map - France | 0 | - | 4.98 | 47,842 |
| Country Quiz on a Map - Germany | 0 | - | 4.95 | 35,691 |
| Ancient Greece A-Z | 0 | - | 4.60 | 23,263 |
| The Trojan War | 0 | - | 4.83 | 40,114 |
| Greek Mythology General Knowledge #1 | 0 | - | 4.85 | 113,335 |
| Famous Irish People | 0 | - | 4.05 | 46,086 |
| History of Italy | 0 | - | 4.55 | 32,196 |
| Italy Multiple Choice | 0 | - | 4.74 | 104,562 |
| Ancient Roman Trivia #1 | 0 | - | 4.85 | 85,722 |
| Roman Emperors | 0 | - | 4.95 | 121,507 |
| Geography of the Dutch Empire | 0 | - | 4.62 | 34,862 |
| Famous Nordic People | 0 | - | 4.34 | 20,357 |
| Famous Spaniards Quiz | 0 | - | 4.24 | 11,652 |
| Countries of the Spanish Empire | 0 | - | 4.52 | 77,480 |
| The British Royal Family - Modern Times | 0 | - | 4.16 | 21,585 |
| London A-Z | 0 | - | 4.10 | 40,917 |
| Asian Cities A-Z by Clue | 0 | - | 4.52 | 43,108 |
| Asian Countries by First 2 Letters | 0 | - | 4.92 | 281,119 |
| Africa A-Z | 0 | - | 4.57 | 46,808 |
| African Countries by First 2 Letters | 0 | - | 4.96 | 269,735 |
| 100 Most Common English Words | 0 | - | 4.88 | 1,328,202 |
| Australian Capitals | 0 | - | 4.92 | 62,867 |
| Major non-NATO U.S. Allies | 0 | - | 4.52 | 52,615 |
| Europe Map Quiz | 0 | - | 5.00 | 4,794,911 |
| Europe Geography Quiz #1 | 0 | - | 4.54 | 71,588 |
| Europe Geography Quiz #2 | 0 | - | 4.57 | 72,259 |
| Europe Geography Quiz #4 | 0 | - | 4.57 | 70,529 |
| Europe Geography Quiz #5 | 0 | - | 4.55 | 61,483 |
| Four Letter European Geography #1 | 0 | - | 4.41 | 28,637 |
| Four Letter European Geography #2 | 0 | - | 4.54 | 20,803 |
| Capitals of French Regions | 0 | - | 4.45 | 16,216 |
| Regions of France | 0 | - | 4.70 | 122,482 |
| France Immigration by Country | 0 | - | 4.70 | 77,037 |
| German Groups of Things | 0 | - | 4.47 | 38,682 |
| Capitals of German States | 0 | - | 4.74 | 29,101 |
| Chancellors of Germany, 1949–present | 0 | - | 4.60 | 23,601 |
| Germany True or False? | 0 | - | 4.61 | 49,084 |
| Largest Islands of Greece | 0 | - | 4.59 | 48,608 |
| Olympian Gods Quiz | 0 | - | 4.96 | 504,671 |
| Ancient Greek Words | 0 | - | 4.93 | 112,727 |
| 101 Figures from Greek Mythology | 0 | - | 4.99 | 128,063 |
| Provinces of the Netherlands | 0 | - | 4.80 | 41,970 |
| 100 Greatest Britons Quiz | 0 | - | 4.41 | 48,509 |
| Foods in a Full English Breakfast | 0 | - | 4.46 | 103,991 |
| Things British People Know that Americans Don't | 0 | - | 4.25 | 51,615 |
| Name Every Beatles Song | 0 | - | 4.97 | 238,877 |
| Bohemian Rhapsody Lyrics | 0 | - | 4.98 | 293,041 |
| Famous Scottish People | 0 | - | 4.22 | 18,445 |
| Asian Geography By Letter - A | 0 | - | 4.64 | 71,556 |
| Asian Geography by Letter - H | 0 | - | 4.50 | 66,175 |
| Asian Geography By Letter - M | 0 | - | 4.48 | 61,740 |
| Asian Geography by Letter - P | 0 | - | 4.45 | 58,303 |
| Asian Geography by Letter - T | 0 | - | 4.52 | 57,744 |
| Asian Geography By Letter - L | 0 | - | 4.49 | 43,412 |
| Asian Geography By Letter - O | 0 | - | 4.66 | 32,426 |
| Middle East A-Z | 0 | - | 4.47 | 46,280 |
| Most Common English Verbs - Extreme | 0 | - | 4.96 | 158,856 |
| Oceania Map Quiz | 0 | - | 4.98 | 660,695 |
| Canada A-Z | 0 | - | 4.73 | 33,002 |
| European Physical Geography | 0 | - | 4.26 | 33,621 |
| Geography of Russia | 0 | - | 4.57 | 21,626 |
| Slovakia... or Slovenia? | 0 | - | 4.69 | 42,180 |
| History of Austria | 0 | - | 4.70 | 17,992 |
| Geography of the French Empire | 0 | - | 4.45 | 27,240 |
| The French Revolution | 0 | - | 4.47 | 24,173 |
| France Multiple Choice | 0 | - | 4.39 | 40,881 |
| History of France | 0 | - | 4.61 | 57,762 |
| Biggest Cities in Germany in 1910 | 0 | - | 4.41 | 23,580 |
| Roman Numeral Decoding Quiz | 0 | - | 4.94 | 440,604 |
| Two Letter Roman Numerals | 0 | - | 4.97 | 56,652 |
| The Vikings! | 0 | - | 4.46 | 28,430 |
| Sweden Immigration by Country | 0 | - | 4.53 | 56,452 |
| The Portuguese Empire | 0 | - | 4.58 | 12,120 |
| American to British Word Translation | 0 | - | 4.14 | 139,863 |
| Languages of the United Kingdom | 0 | - | 4.14 | 41,097 |
| The Thirteen Dwarves in the Hobbit | 0 | - | 4.81 | 28,861 |
| Champions League Top 4 | 0 | - | 4.78 | 139,717 |
| East Asia Map Quiz | 0 | - | 4.99 | 1,453,670 |
| Asia Map Quiz | 0 | - | 4.99 | 927,119 |
| A Quiz About Islam | 0 | - | 4.32 | 48,669 |
| Countries That Don't Recognize Israel | 0 | - | 4.68 | 35,249 |
| Africa Map Quiz | 0 | - | 5.00 | 2,131,328 |
| Oceanian Capitals - Map Quiz | 0 | - | 4.96 | 51,636 |
| Australia Map Quiz | 0 | - | 4.95 | 346,584 |
| U.S. Geography by Letter - B | 0 | - | 4.54 | 70,176 |
| U.S. Geography by Letter - S | 0 | - | 4.55 | 58,634 |
| U.S. Federal Holidays | 0 | - | 4.33 | 99,657 |
| United States Map Quiz | 0 | - | 4.98 | 4,174,214 |
| Two Letter U.S. State Abbreviations | 0 | - | 4.19 | 750,514 |
| Mediterranean Countries Quiz | 0 | - | 4.99 | 214,464 |
| Countries with Territorial Claims in Antarctica | 0 | - | 4.94 | 93,009 |
| Countries That Use the Euro | 0 | - | 4.95 | 107,351 |
| Europe Cities Map Quiz | 0 | - | 4.99 | 366,678 |
| Europe Geography Quiz #3 | 0 | - | 4.35 | 63,960 |
| 10 Easternmost Countries in Europe | 0 | - | 4.87 | 117,583 |
| Country Codes of Europe | 0 | - | 3.45 | 13,857 |
| The Only European Country ... | 0 | - | 4.91 | 219,725 |
| European Countries NOT in NATO | 0 | - | 4.91 | 62,910 |
| European Geographic Groups of Four | 0 | - | 4.56 | 20,534 |
| Austria... or Australia? | 0 | - | 4.67 | 104,871 |
| Presidents of France | 0 | - | 4.25 | 24,385 |
| Word Chain - France | 0 | - | 4.38 | 42,970 |
| Ancient Greek Trivia | 0 | - | 4.62 | 67,294 |
| Geography of Ancient Greece | 0 | - | 4.69 | 32,078 |
| Most-Mentioned Characters in the Iliad | 0 | - | 4.81 | 21,080 |
| Figures from Greek Mythology | 0 | - | 4.92 | 194,103 |
| Italian Foods | 0 | - | 4.30 | 73,421 |
| Countries Italy Declared War On | 0 | - | 4.74 | 49,420 |
