| Netherlands Immigration by Country | 0 | - | 4.94 | 43,756 |
| European Countries by First 2 Letters | 0 | - | 4.95 | 526,116 |
| Most Guessed Cities in Europe - Not Capitals | 0 | - | 4.82 | 86,801 |
| European Geography By Letter - P #1 | 0 | - | 4.81 | 96,279 |
| European Geography By Letter - B #2 | 0 | - | 4.83 | 76,147 |
| Save Europeans by Guessing Countries | 0 | - | 4.84 | 209,146 |
| Category Elimination - European Geography #3 | 0 | - | 4.85 | 79,680 |
| States of Germany | 0 | - | 4.96 | 149,866 |
| Germany Immigration by Country | 0 | - | 4.84 | 79,939 |
| Regions of Italy | 0 | - | 4.92 | 74,619 |
| History of The Netherlands | 0 | - | 4.46 | 17,301 |
| Regions of Spain Quiz | 0 | - | 4.90 | 112,180 |
| Cantons of Switzerland | 0 | - | 4.98 | 50,071 |
| Famous Dutch and Belgian People | 0 | - | 4.56 | 17,957 |
| Departments of France | 0 | - | 4.93 | 52,703 |
| Famous Germans | 0 | - | 4.50 | 54,574 |
| Famous Italians by Clue | 0 | - | 4.45 | 88,273 |
| Countries Surrounding Rome | 0 | - | 4.97 | 49,348 |
| Provinces of the Netherlands | 0 | - | 4.80 | 40,741 |
| England or Wales? | 0 | - | 4.94 | 45,287 |
| Count to 10 in Europe: Pro | 0 | - | 4.85 | 68,540 |
| Official European Union Languages | 0 | - | 4.97 | 236,397 |
| European Countries in their Native Language | 0 | - | 4.99 | 156,622 |
| Europe by Borders in 30 Seconds | 0 | - | 4.98 | 424,940 |
| United Kingdom A-Z | 0 | - | 4.53 | 87,175 |
| Pre-Euro Currencies | 0 | - | 4.44 | 52,428 |
| Modern Day Countries of the Dutch Empire on a Map | 0 | - | 4.87 | 60,308 |
| The British Royal Family - Modern Times | 0 | - | 4.16 | 21,454 |
| English Monarchs in Order by First Letter | 0 | - | 4.38 | 31,294 |
| Europe Geography Decoder | 0 | - | 4.86 | 69,493 |
| The Mafia Quiz | 0 | - | 4.46 | 23,194 |
| Countries that Beat Switzerland | 0 | - | 4.88 | 41,539 |
| Geography of the Dutch Empire | 0 | - | 4.62 | 34,469 |
| Add A Letter - Make a European City | 0 | - | 4.90 | 23,228 |
| Celtic Nations | 0 | - | 4.69 | 46,800 |
| European Geography By Letter - A | 0 | - | 4.56 | 132,328 |
| European Geography By Letter - B #1 | 0 | - | 4.67 | 110,838 |
| European Geography By Letter - C | 0 | - | 4.46 | 111,774 |
| European Geography By Letter - D | 0 | - | 4.50 | 106,645 |
| European Geography By Letter - L | 0 | - | 4.52 | 112,168 |
| European Geography By Letter - M | 0 | - | 4.61 | 128,797 |
| European Geography By Letter - N | 0 | - | 4.44 | 99,629 |
| European Geography By Letter - R | 0 | - | 4.42 | 92,593 |
| European Geography By Letter - V | 0 | - | 4.43 | 91,996 |
| European Geography By Letter - T | 0 | - | 4.41 | 81,254 |
| European Geography By Letter - S #1 | 0 | - | 4.63 | 99,560 |
| Countries of Europe with an Empty Map | 0 | - | 5.00 | 307,633 |
| All First-Level Subdivisions of Europe on a Map | 0 | - | 4.98 | 167,625 |
| Famous Swiss and Austrian People | 0 | - | 4.45 | 14,549 |
| Regions of France | 0 | - | 4.78 | 119,093 |
| France A-Z | 0 | - | 4.16 | 38,044 |
| France Immigration by Country | 0 | - | 4.72 | 75,928 |
| German Groups of Things | 0 | - | 4.46 | 38,294 |
| Germany Multiple Choice | 0 | - | 4.84 | 54,023 |
| Germany True or False? | 0 | - | 4.61 | 48,512 |
| Largest Islands of Greece | 0 | - | 4.59 | 47,422 |
| Switzerland A-Z | 0 | - | 4.45 | 25,496 |
| 100 Greatest Britons Quiz | 0 | - | 4.41 | 48,031 |
| Counties of England | 0 | - | 4.97 | 788,558 |
| Foods in a Full English Breakfast | 0 | - | 4.46 | 101,885 |
| The UK for Americans - True or False | 0 | - | 4.46 | 58,374 |
| "Big Five" European Soccer Champions Since 2000 | 0 | - | 4.97 | 349,340 |
| U.S. Citizenship Test Questions | 0 | - | 4.83 | 238,221 |
| Catholic Countries in Europe | 0 | - | 4.83 | 94,143 |
| Monarchies of Europe | 0 | - | 4.90 | 97,239 |
| Federal Subjects of Russia | 0 | - | 4.94 | 143,710 |
| Famous French People | 0 | - | 4.12 | 27,894 |
| Regions of France Map Quiz | 0 | - | 4.97 | 143,028 |
| States of Germany Map Quiz | 0 | - | 4.91 | 131,594 |
| Famous Nordic People | 0 | - | 4.34 | 19,828 |
| Famous Spaniards Quiz | 0 | - | 4.24 | 11,540 |
| UK Cities Map Quiz | 0 | - | 4.95 | 461,977 |
| Countries and Territories of the United Kingdom | 0 | - | 4.89 | 92,862 |
| Counties of England Map Quiz | 0 | - | 4.97 | 305,985 |
| People on Money - England | 0 | - | 4.29 | 16,559 |
| Champions League Winners | 0 | - | 4.92 | 995,387 |
| Asian Geography By Letter - B | 0 | - | 4.85 | 65,944 |
| Monarchies of Asia | 0 | - | 4.97 | 70,551 |
| Biggest Countries in Europe in 1700 | 0 | - | 4.73 | 58,106 |
| Kings of France Quiz | 0 | - | 4.20 | 32,542 |
| States of the German Confederation in 1848 | 0 | - | 4.89 | 31,493 |
| Netherlands Country Quiz | 0 | - | 4.50 | 79,917 |
| Sweden Immigration by Country | 0 | - | 4.55 | 55,662 |
| 10 Closest Megacities to London | 0 | - | 4.90 | 17,396 |
| European Geography By Letter - E | 0 | - | 4.23 | 112,160 |
| 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 | 101,223 |
| European Geography By Letter - I | 0 | - | 4.10 | 94,440 |
| European Geography By Letter - K | 0 | - | 4.14 | 69,116 |
| European Geography By Letter - O | 0 | - | 4.28 | 61,892 |
| European Geography by Letter - W | 0 | - | 4.20 | 82,272 |
| European Geography By Letter - S #2 | 0 | - | 4.19 | 50,481 |
| European Geography A-Z | 0 | - | 4.28 | 48,969 |
| Category Elimination - European Geography #1 | 0 | - | 4.98 | 230,297 |
| European Map without 10 Random Countries | 0 | - | 4.97 | 274,026 |
| Category Elimination - European Geography #2 | 0 | - | 4.99 | 164,977 |
| France Cities Map Quiz | 0 | - | 4.96 | 165,088 |
| Word Chain - France | 0 | - | 4.38 | 42,570 |
| Germany Country Quiz | 0 | - | 4.82 | 156,436 |
| Germany Cities Map Quiz | 0 | - | 4.87 | 125,074 |
| Ancient Greek Trivia | 0 | - | 4.62 | 66,744 |
| Geography of Ancient Greece | 0 | - | 4.69 | 31,757 |
| Italy Country Quiz | 0 | - | 4.82 | 122,110 |
| Regions of Italy Map Quiz | 0 | - | 4.96 | 148,276 |
| Italy Cities Map Quiz | 0 | - | 4.97 | 151,002 |
| Italian Foods | 0 | - | 4.30 | 72,133 |
| Spain Cities Map Quiz | 0 | - | 4.87 | 95,889 |
| Regions of Spain Map Quiz | 0 | - | 4.95 | 184,548 |
| Canary Islands | 0 | - | 4.61 | 17,390 |
| Biggest Spanish Empire Countries | 0 | - | 4.91 | 114,696 |
| Switzerland Immigration by Country | 0 | - | 4.70 | 29,101 |
| British Spellings | 0 | - | 4.07 | 99,193 |
| British Groups of Things | 0 | - | 4.25 | 82,659 |
| British Acronyms | 0 | - | 4.39 | 45,605 |
| UK Immigration by Country | 0 | - | 4.94 | 139,518 |
| United Kingdom Decoder | 0 | - | 4.29 | 39,942 |
| United Kingdom Country Quiz | 0 | - | 4.96 | 138,017 |
| Modern-Day Countries of the British Empire in 1921 | 0 | - | 4.99 | 116,152 |
| Geography of Scotland | 0 | - | 4.63 | 21,468 |
| Famous Scottish People | 0 | - | 4.22 | 18,321 |
| All UEFA Champions League Teams Ever | 0 | - | 4.84 | 128,336 |
| European Countries with the Fewest Overnight Visitors | 0 | - | 4.78 | 41,596 |
| Word Scramble - European Countries | 0 | - | 4.70 | 140,931 |
| Top 20 Football Clubs in Europe | 0 | - | 4.48 | 112,858 |
| Name a Major European City A-Z | 0 | - | 4.33 | 49,082 |
| 100 Longest Rivers in Europe - with a Map | 0 | - | 4.94 | 64,761 |
| Slavic Languages | 0 | - | 4.67 | 53,942 |
| French Geography Quiz #1 | 0 | - | 4.89 | 34,495 |
| Andorra Country Quiz | 0 | - | 4.90 | 31,362 |
| French History Multiple Choice | 0 | - | 4.55 | 32,860 |
| History of Germany | 0 | - | 4.39 | 52,595 |
| Letters of the Greek Alphabet | 0 | - | 4.97 | 641,392 |
| Name that Greek Letter | 0 | - | 4.94 | 321,480 |
| Capitals of Italian Regions | 0 | - | 4.62 | 36,419 |
| Spanish Immigration by Country | 0 | - | 4.63 | 55,231 |
| Most Common First Names in Spain | 0 | - | 4.27 | 45,464 |
| Modern Day Countries of the Spanish Empire on a Map | 0 | - | 4.95 | 85,431 |
| Most Common Surnames in the UK | 0 | - | 4.21 | 69,424 |
| Fictional Characters from Great Britain | 0 | - | 4.24 | 41,904 |
| Wonderwall Lyrics | 0 | - | 4.25 | 73,417 |
| Malta Country Quiz | 0 | - | 4.81 | 30,797 |
| Africa A-Z | 0 | - | 4.57 | 46,349 |
| African Countries by First 2 Letters | 0 | - | 4.96 | 266,380 |
| Top European Languages on a Map | 0 | - | 4.77 | 131,037 |
| Famous Russians | 0 | - | 4.16 | 23,713 |
| History of Russia Quiz | 0 | - | 4.49 | 31,777 |
| Russia Multiple Choice | 0 | - | 4.58 | 40,550 |
| Movies Set in France | 0 | - | 4.26 | 13,067 |
| French Inventions | 0 | - | 4.08 | 13,859 |
| Country Quiz on a Map - France | 0 | - | 4.98 | 46,556 |
| History of Paris | 0 | - | 4.24 | 13,612 |
| Word Chain - Germany | 0 | - | 4.31 | 22,471 |
| Country Quiz on a Map - Germany | 0 | - | 4.95 | 34,414 |
| Ancient Greece A-Z | 0 | - | 4.60 | 22,977 |
| The Trojan War | 0 | - | 4.83 | 39,400 |
| Greek Mythology General Knowledge #1 | 0 | - | 4.85 | 110,408 |
| 101 Figures from Greek Mythology | 0 | - | 4.99 | 124,133 |
| Famous Irish People | 0 | - | 4.05 | 45,852 |
| History of Italy | 0 | - | 4.55 | 31,802 |
| Word Chain - Italy | 0 | - | 4.07 | 23,082 |
| Italy Multiple Choice | 0 | - | 4.74 | 103,108 |
| Embarrassing Chapters in Italian History | 0 | - | 4.24 | 12,034 |
| Ancient Roman Trivia #1 | 0 | - | 4.85 | 83,996 |
| Roman Emperors | 0 | - | 4.95 | 118,347 |
| Countries of the Spanish Empire | 0 | - | 4.52 | 76,965 |
| Word Chain - United Kingdom | 0 | - | 4.05 | 29,233 |
| Name a Valid English City | 0 | - | 4.19 | 16,624 |
| London A-Z | 0 | - | 4.10 | 40,626 |
| Asian Cities A-Z by Clue | 0 | - | 4.53 | 33,693 |
| Asian Countries by First 2 Letters | 0 | - | 4.91 | 276,984 |
| Major non-NATO U.S. Allies | 0 | - | 4.52 | 51,700 |
| Europe Map Quiz | 0 | - | 5.00 | 4,728,499 |
| Europe Geography Quiz #1 | 0 | - | 4.54 | 70,966 |
| Europe Geography Quiz #2 | 0 | - | 4.57 | 71,588 |
| Europe Geography Quiz #4 | 0 | - | 4.57 | 69,916 |
| Europe Geography Quiz #5 | 0 | - | 4.54 | 60,960 |
| Four Letter European Geography #1 | 0 | - | 4.44 | 27,103 |
| Four Letter European Geography #2 | 0 | - | 4.57 | 19,583 |
| Capitals of French Regions | 0 | - | 4.45 | 15,980 |
| Capitals of German States | 0 | - | 4.74 | 28,799 |
| Chancellors of Germany, 1949–present | 0 | - | 4.60 | 23,083 |
| Olympian Gods Quiz | 0 | - | 4.96 | 495,226 |
| Ancient Greek Words | 0 | - | 4.92 | 110,596 |
| British to American Food Translation | 0 | - | 3.38 | 51,805 |
| Things British People Know that Americans Don't | 0 | - | 4.25 | 51,250 |
| Name Every Beatles Song | 0 | - | 4.97 | 233,902 |
| Bohemian Rhapsody Lyrics | 0 | - | 4.98 | 290,232 |
| Asian Geography By Letter - A | 0 | - | 4.64 | 70,785 |
| Asian Geography by Letter - H | 0 | - | 4.49 | 65,359 |
| Asian Geography By Letter - M | 0 | - | 4.47 | 61,123 |
| Asian Geography by Letter - P | 0 | - | 4.45 | 57,533 |
| Asian Geography by Letter - T | 0 | - | 4.50 | 57,029 |
| Asian Geography By Letter - L | 0 | - | 4.49 | 42,667 |
| Middle East A-Z | 0 | - | 4.47 | 45,754 |
| 100 Most Common English Words | 0 | - | 4.88 | 1,303,876 |
| Africa Map Quiz | 0 | - | 5.00 | 2,103,153 |
| Oceania Map Quiz | 0 | - | 4.98 | 634,696 |
| Australian Capitals | 0 | - | 4.92 | 62,586 |
| Canada A-Z | 0 | - | 4.73 | 32,634 |
