| Netherlands Immigration by Country | 0 | - | 4.93 | 52,645 |
| European Countries by First 2 Letters | 0 | - | 4.95 | 531,684 |
| Most Guessed Cities in Europe - Not Capitals | 0 | - | 4.82 | 87,881 |
| European Geography By Letter - P #1 | 0 | - | 4.81 | 98,553 |
| European Geography By Letter - B #2 | 0 | - | 4.87 | 88,246 |
| Save Europeans by Guessing Countries | 0 | - | 4.86 | 215,874 |
| Category Elimination - European Geography #3 | 0 | - | 4.86 | 81,688 |
| States of Germany | 0 | - | 4.95 | 153,968 |
| Germany Immigration by Country | 0 | - | 4.86 | 81,523 |
| Regions of Italy | 0 | - | 4.92 | 76,674 |
| History of The Netherlands | 0 | - | 4.46 | 17,526 |
| Regions of Spain Quiz | 0 | - | 4.90 | 114,992 |
| Cantons of Switzerland | 0 | - | 4.98 | 51,600 |
| Famous Dutch and Belgian People | 0 | - | 4.56 | 18,114 |
| Departments of France | 0 | - | 4.93 | 54,848 |
| Famous Germans | 0 | - | 4.50 | 55,661 |
| Famous Italians by Clue | 0 | - | 4.45 | 90,056 |
| Countries Surrounding Rome | 0 | - | 4.97 | 49,696 |
| Provinces of the Netherlands | 0 | - | 4.80 | 41,629 |
| England or Wales? | 0 | - | 4.94 | 45,891 |
| Count to 10 in Europe: Pro | 0 | - | 4.86 | 69,566 |
| Official European Union Languages | 0 | - | 4.97 | 239,416 |
| European Countries in their Native Language | 0 | - | 4.99 | 158,434 |
| Europe by Borders in 30 Seconds | 0 | - | 4.98 | 430,145 |
| United Kingdom A-Z | 0 | - | 4.51 | 88,260 |
| Pre-Euro Currencies | 0 | - | 4.44 | 52,700 |
| Europe Geography Decoder | 0 | - | 4.86 | 70,218 |
| Famous French People | 0 | - | 4.07 | 35,992 |
| The Mafia Quiz | 0 | - | 4.46 | 23,410 |
| Countries that Beat Switzerland | 0 | - | 4.88 | 41,992 |
| English Monarchs in Order by First Letter | 0 | - | 4.38 | 32,056 |
| Geography of the Dutch Empire | 0 | - | 4.62 | 34,781 |
| Add A Letter - Make a European City | 0 | - | 4.90 | 23,469 |
| Celtic Nations | 0 | - | 4.61 | 47,059 |
| European Geography By Letter - A | 0 | - | 4.52 | 147,648 |
| European Geography By Letter - B #1 | 0 | - | 4.62 | 121,025 |
| European Geography By Letter - C | 0 | - | 4.43 | 122,717 |
| European Geography By Letter - D | 0 | - | 4.50 | 110,030 |
| European Geography By Letter - L | 0 | - | 4.52 | 114,703 |
| European Geography By Letter - M | 0 | - | 4.69 | 132,032 |
| European Geography By Letter - N | 0 | - | 4.44 | 101,846 |
| European Geography By Letter - R | 0 | - | 4.43 | 94,359 |
| European Geography By Letter - V | 0 | - | 4.42 | 93,575 |
| European Geography By Letter - T | 0 | - | 4.41 | 83,259 |
| European Geography By Letter - S #1 | 0 | - | 4.63 | 101,194 |
| Countries of Europe with an Empty Map | 0 | - | 5.00 | 312,148 |
| All First-Level Subdivisions of Europe on a Map | 0 | - | 4.99 | 174,896 |
| Famous Swiss and Austrian People | 0 | - | 4.45 | 14,656 |
| Regions of France | 0 | - | 4.70 | 121,716 |
| France A-Z | 0 | - | 4.16 | 38,309 |
| France Immigration by Country | 0 | - | 4.70 | 76,824 |
| German Groups of Things | 0 | - | 4.47 | 38,594 |
| Germany Multiple Choice | 0 | - | 4.84 | 54,614 |
| Germany True or False? | 0 | - | 4.61 | 48,960 |
| States of the German Confederation in 1848 | 0 | - | 4.90 | 32,337 |
| Largest Islands of Greece | 0 | - | 4.59 | 48,315 |
| Switzerland A-Z | 0 | - | 4.45 | 25,738 |
| 100 Greatest Britons Quiz | 0 | - | 4.41 | 48,379 |
| Counties of England | 0 | - | 4.97 | 801,188 |
| Foods in a Full English Breakfast | 0 | - | 4.46 | 103,645 |
| The UK for Americans - True or False | 0 | - | 4.43 | 58,763 |
| "Big Five" European Soccer Champions Since 2000 | 0 | - | 4.97 | 360,017 |
| U.S. Citizenship Test Questions | 0 | - | 4.83 | 240,588 |
| Catholic Countries in Europe | 0 | - | 4.83 | 95,602 |
| Federal Subjects of Russia | 0 | - | 4.95 | 148,873 |
| Regions of France Map Quiz | 0 | - | 4.97 | 145,342 |
| States of Germany Map Quiz | 0 | - | 4.92 | 133,516 |
| Famous Nordic People | 0 | - | 4.34 | 20,235 |
| Famous Spaniards Quiz | 0 | - | 4.24 | 11,627 |
| UK Cities Map Quiz | 0 | - | 4.96 | 465,901 |
| Countries and Territories of the United Kingdom | 0 | - | 4.90 | 94,370 |
| Counties of England Map Quiz | 0 | - | 4.97 | 308,652 |
| The British Royal Family - Modern Times | 0 | - | 4.16 | 21,564 |
| People on Money - England | 0 | - | 4.29 | 16,634 |
| Champions League Winners | 0 | - | 4.92 | 1,013,008 |
| Asian Geography By Letter - B | 0 | - | 4.85 | 66,876 |
| Biggest Countries in Europe in 1700 | 0 | - | 4.73 | 58,688 |
| Netherlands Country Quiz | 0 | - | 4.53 | 80,812 |
| Sweden Immigration by Country | 0 | - | 4.55 | 56,308 |
| 10 Closest Megacities to London | 0 | - | 4.90 | 17,805 |
| European Geography By Letter - E | 0 | - | 4.23 | 114,774 |
| European Geography By Letter - F | 0 | - | 4.15 | 94,084 |
| European Geography By Letter - H | 0 | - | 4.30 | 96,891 |
| European Geography By Letter - G | 0 | - | 4.27 | 103,591 |
| European Geography By Letter - I | 0 | - | 4.09 | 96,290 |
| European Geography By Letter - K | 0 | - | 4.15 | 70,927 |
| European Geography By Letter - O | 0 | - | 4.29 | 63,342 |
| European Geography by Letter - W | 0 | - | 4.21 | 83,403 |
| European Geography By Letter - S #2 | 0 | - | 4.20 | 51,694 |
| European Geography A-Z | 0 | - | 4.29 | 49,431 |
| Category Elimination - European Geography #1 | 0 | - | 4.98 | 235,106 |
| European Map without 10 Random Countries | 0 | - | 4.97 | 278,399 |
| Category Elimination - European Geography #2 | 0 | - | 4.99 | 168,404 |
| Andorra Country Quiz | 0 | - | 4.91 | 31,872 |
| France Cities Map Quiz | 0 | - | 4.96 | 167,508 |
| Word Chain - France | 0 | - | 4.38 | 42,896 |
| Germany Country Quiz | 0 | - | 4.83 | 158,558 |
| Germany Cities Map Quiz | 0 | - | 4.87 | 126,891 |
| Ancient Greek Trivia | 0 | - | 4.62 | 67,170 |
| Geography of Ancient Greece | 0 | - | 4.69 | 31,999 |
| Regions of Italy Map Quiz | 0 | - | 4.96 | 150,010 |
| Italy Cities Map Quiz | 0 | - | 4.97 | 152,869 |
| Italian Foods | 0 | - | 4.30 | 73,123 |
| Spain Cities Map Quiz | 0 | - | 4.87 | 97,315 |
| Regions of Spain Map Quiz | 0 | - | 4.95 | 186,576 |
| Canary Islands | 0 | - | 4.62 | 17,513 |
| Biggest Spanish Empire Countries | 0 | - | 4.91 | 116,579 |
| Switzerland Immigration by Country | 0 | - | 4.69 | 29,951 |
| British Spellings | 0 | - | 4.06 | 99,556 |
| British Groups of Things | 0 | - | 4.25 | 82,974 |
| British Acronyms | 0 | - | 4.40 | 45,899 |
| UK Immigration by Country | 0 | - | 4.94 | 141,453 |
| United Kingdom Decoder | 0 | - | 4.29 | 40,085 |
| United Kingdom Country Quiz | 0 | - | 4.96 | 140,646 |
| Modern-Day Countries of the British Empire in 1921 | 0 | - | 4.99 | 118,459 |
| Geography of Scotland | 0 | - | 4.63 | 21,704 |
| Famous Scottish People | 0 | - | 4.22 | 18,426 |
| All UEFA Champions League Teams Ever | 0 | - | 4.85 | 131,618 |
| Countries by Wikipedia Descriptions #1 | 0 | - | 4.93 | 65,514 |
| Countries by Wikipedia Descriptions #4 | 0 | - | 4.87 | 57,088 |
| European Countries with the Fewest Overnight Visitors | 0 | - | 4.80 | 41,699 |
| Word Scramble - European Countries | 0 | - | 4.73 | 142,145 |
| Top 20 Football Clubs in Europe | 0 | - | 4.48 | 116,251 |
| Name a Major European City A-Z | 0 | - | 4.33 | 49,761 |
| 100 Longest Rivers in Europe - with a Map | 0 | - | 4.94 | 65,774 |
| Slavic Languages | 0 | - | 4.68 | 54,609 |
| French Geography Quiz #1 | 0 | - | 4.89 | 35,007 |
| French History Multiple Choice | 0 | - | 4.55 | 33,176 |
| History of Germany | 0 | - | 4.39 | 52,943 |
| Letters of the Greek Alphabet | 0 | - | 4.97 | 650,608 |
| Name that Greek Letter | 0 | - | 4.93 | 324,647 |
| Capitals of Italian Regions | 0 | - | 4.62 | 36,703 |
| Spanish Immigration by Country | 0 | - | 4.63 | 55,589 |
| Most Common First Names in Spain | 0 | - | 4.32 | 54,745 |
| Most Common Surnames in the UK | 0 | - | 4.22 | 69,906 |
| Fictional Characters from Great Britain | 0 | - | 4.24 | 42,073 |
| Wonderwall Lyrics | 0 | - | 4.25 | 74,005 |
| Malta Country Quiz | 0 | - | 4.81 | 31,198 |
| Top European Languages on a Map | 0 | - | 4.77 | 132,623 |
| Famous Russians | 0 | - | 4.16 | 23,890 |
| History of Russia Quiz | 0 | - | 4.47 | 31,984 |
| Russia Multiple Choice | 0 | - | 4.58 | 40,830 |
| Russian History A-Z | 0 | - | 4.35 | 32,089 |
| Movies Set in France | 0 | - | 4.26 | 13,140 |
| French Inventions | 0 | - | 4.10 | 13,918 |
| Country Quiz on a Map - France | 0 | - | 4.98 | 47,571 |
| History of Paris | 0 | - | 4.24 | 13,667 |
| Word Chain - Germany | 0 | - | 4.31 | 22,659 |
| Country Quiz on a Map - Germany | 0 | - | 4.95 | 35,431 |
| Ancient Greece A-Z | 0 | - | 4.60 | 23,210 |
| The Trojan War | 0 | - | 4.83 | 39,929 |
| Greek Mythology General Knowledge #1 | 0 | - | 4.85 | 112,663 |
| 101 Figures from Greek Mythology | 0 | - | 4.99 | 127,115 |
| Famous Irish People | 0 | - | 4.05 | 46,048 |
| History of Italy | 0 | - | 4.55 | 32,107 |
| Word Chain - Italy | 0 | - | 4.07 | 23,205 |
| Italy Multiple Choice | 0 | - | 4.74 | 104,186 |
| Embarrassing Chapters in Italian History | 0 | - | 4.24 | 12,145 |
| Ancient Roman Trivia #1 | 0 | - | 4.85 | 85,472 |
| Roman Emperors | 0 | - | 4.95 | 120,866 |
| Countries of the Spanish Empire | 0 | - | 4.52 | 77,378 |
| Word Chain - United Kingdom | 0 | - | 4.05 | 29,382 |
| Name a Valid English City | 0 | - | 4.19 | 16,792 |
| London A-Z | 0 | - | 4.10 | 40,854 |
| Asian Cities A-Z by Clue | 0 | - | 4.52 | 42,848 |
| Asian Countries by First 2 Letters | 0 | - | 4.92 | 280,284 |
| Africa A-Z | 0 | - | 4.57 | 46,737 |
| African Countries by First 2 Letters | 0 | - | 4.96 | 269,023 |
| NBA Players by Wikipedia Descriptions | 0 | - | 4.43 | 40,644 |
| Major non-NATO U.S. Allies | 0 | - | 4.52 | 52,404 |
| Europe Map Quiz | 0 | - | 5.00 | 4,780,375 |
| Europe Geography Quiz #1 | 0 | - | 4.55 | 71,446 |
| Europe Geography Quiz #2 | 0 | - | 4.57 | 72,101 |
| Europe Geography Quiz #4 | 0 | - | 4.57 | 70,397 |
| Europe Geography Quiz #5 | 0 | - | 4.55 | 61,363 |
| Four Letter European Geography #1 | 0 | - | 4.41 | 28,414 |
| Four Letter European Geography #2 | 0 | - | 4.54 | 20,638 |
| Capitals of French Regions | 0 | - | 4.45 | 16,154 |
| Kings of France Quiz | 0 | - | 4.20 | 32,875 |
| Capitals of German States | 0 | - | 4.74 | 29,032 |
| Chancellors of Germany, 1949–present | 0 | - | 4.60 | 23,490 |
| Olympian Gods Quiz | 0 | - | 4.96 | 502,933 |
| Ancient Greek Words | 0 | - | 4.93 | 112,223 |
| British to American Food Translation | 0 | - | 3.38 | 52,016 |
| Things British People Know that Americans Don't | 0 | - | 4.25 | 51,537 |
| Name Every Beatles Song | 0 | - | 4.97 | 237,831 |
| Bohemian Rhapsody Lyrics | 0 | - | 4.98 | 292,549 |
| Asian Geography By Letter - A | 0 | - | 4.64 | 71,362 |
| Asian Geography by Letter - H | 0 | - | 4.50 | 65,956 |
| Asian Geography By Letter - M | 0 | - | 4.48 | 61,578 |
| Asian Geography by Letter - P | 0 | - | 4.45 | 58,101 |
| Asian Geography by Letter - T | 0 | - | 4.52 | 57,565 |
| Asian Geography By Letter - L | 0 | - | 4.49 | 43,229 |
| Asian Geography By Letter - O | 0 | - | 4.66 | 32,182 |
| Middle East A-Z | 0 | - | 4.47 | 46,204 |
| 100 Most Common English Words | 0 | - | 4.88 | 1,323,005 |
| Oceania Map Quiz | 0 | - | 4.98 | 657,820 |
| Australian Capitals | 0 | - | 4.92 | 62,804 |
| Canada A-Z | 0 | - | 4.73 | 32,929 |
| European Physical Geography | 0 | - | 4.26 | 33,571 |
