| Netherlands Immigration by Country | 0 | - | 4.93 | 52,022 |
| European Countries by First 2 Letters | 0 | - | 4.95 | 529,135 |
| Most Guessed Cities in Europe - Not Capitals | 0 | - | 4.82 | 87,300 |
| European Geography By Letter - B #2 | 0 | - | 4.84 | 78,095 |
| Save Europeans by Guessing Countries | 0 | - | 4.83 | 212,666 |
| Category Elimination - European Geography #3 | 0 | - | 4.86 | 80,830 |
| States of Germany | 0 | - | 4.96 | 152,183 |
| Germany Immigration by Country | 0 | - | 4.85 | 80,950 |
| Regions of Italy | 0 | - | 4.92 | 75,707 |
| History of The Netherlands | 0 | - | 4.46 | 17,422 |
| Regions of Spain Quiz | 0 | - | 4.90 | 113,771 |
| Cantons of Switzerland | 0 | - | 4.98 | 51,102 |
| English Monarchs in Order by First Letter | 0 | - | 4.38 | 31,730 |
| Famous Dutch and Belgian People | 0 | - | 4.56 | 18,056 |
| Departments of France | 0 | - | 4.93 | 53,961 |
| Famous Germans | 0 | - | 4.50 | 55,237 |
| Famous Italians by Clue | 0 | - | 4.45 | 89,387 |
| Countries Surrounding Rome | 0 | - | 4.97 | 49,530 |
| Provinces of the Netherlands | 0 | - | 4.80 | 41,293 |
| England or Wales? | 0 | - | 4.94 | 45,638 |
| Count to 10 in Europe: Pro | 0 | - | 4.86 | 69,053 |
| Official European Union Languages | 0 | - | 4.97 | 238,292 |
| European Countries in their Native Language | 0 | - | 4.99 | 157,721 |
| Europe by Borders in 30 Seconds | 0 | - | 4.98 | 427,828 |
| United Kingdom A-Z | 0 | - | 4.51 | 87,614 |
| Pre-Euro Currencies | 0 | - | 4.44 | 52,580 |
| The British Royal Family - Modern Times | 0 | - | 4.16 | 21,521 |
| Europe Geography Decoder | 0 | - | 4.86 | 69,930 |
| Famous French People | 0 | - | 4.06 | 35,326 |
| The Mafia Quiz | 0 | - | 4.46 | 23,312 |
| Countries that Beat Switzerland | 0 | - | 4.88 | 41,792 |
| Geography of the Dutch Empire | 0 | - | 4.61 | 34,636 |
| Add A Letter - Make a European City | 0 | - | 4.90 | 23,375 |
| Celtic Nations | 0 | - | 4.69 | 46,917 |
| European Geography By Letter - A | 0 | - | 4.52 | 145,650 |
| European Geography By Letter - B #1 | 0 | - | 4.68 | 112,741 |
| European Geography By Letter - C | 0 | - | 4.46 | 113,462 |
| European Geography By Letter - D | 0 | - | 4.50 | 108,179 |
| European Geography By Letter - L | 0 | - | 4.52 | 113,235 |
| European Geography By Letter - M | 0 | - | 4.67 | 130,290 |
| European Geography By Letter - P #1 | 0 | - | 4.80 | 97,325 |
| European Geography By Letter - N | 0 | - | 4.44 | 100,633 |
| European Geography By Letter - R | 0 | - | 4.42 | 93,539 |
| European Geography By Letter - V | 0 | - | 4.43 | 92,859 |
| European Geography By Letter - T | 0 | - | 4.41 | 82,232 |
| European Geography By Letter - S #1 | 0 | - | 4.54 | 100,439 |
| Countries of Europe with an Empty Map | 0 | - | 5.00 | 310,197 |
| All First-Level Subdivisions of Europe on a Map | 0 | - | 4.99 | 171,040 |
| Famous Swiss and Austrian People | 0 | - | 4.45 | 14,620 |
| Regions of France | 0 | - | 4.75 | 120,573 |
| France A-Z | 0 | - | 4.16 | 38,186 |
| France Immigration by Country | 0 | - | 4.70 | 76,453 |
| German Groups of Things | 0 | - | 4.46 | 38,453 |
| Germany Multiple Choice | 0 | - | 4.84 | 54,316 |
| Germany True or False? | 0 | - | 4.61 | 48,764 |
| States of the German Confederation in 1848 | 0 | - | 4.89 | 31,927 |
| Largest Islands of Greece | 0 | - | 4.59 | 47,936 |
| Switzerland A-Z | 0 | - | 4.45 | 25,628 |
| 100 Greatest Britons Quiz | 0 | - | 4.41 | 48,245 |
| Counties of England | 0 | - | 4.97 | 795,552 |
| Foods in a Full English Breakfast | 0 | - | 4.46 | 103,144 |
| The UK for Americans - True or False | 0 | - | 4.43 | 58,604 |
| "Big Five" European Soccer Champions Since 2000 | 0 | - | 4.97 | 355,148 |
| U.S. Citizenship Test Questions | 0 | - | 4.83 | 239,288 |
| Catholic Countries in Europe | 0 | - | 4.83 | 95,007 |
| Monarchies of Europe | 0 | - | 4.90 | 98,028 |
| Federal Subjects of Russia | 0 | - | 4.95 | 146,738 |
| Regions of France Map Quiz | 0 | - | 4.97 | 144,267 |
| States of Germany Map Quiz | 0 | - | 4.91 | 132,678 |
| Famous Nordic People | 0 | - | 4.34 | 20,084 |
| Famous Spaniards Quiz | 0 | - | 4.24 | 11,613 |
| UK Cities Map Quiz | 0 | - | 4.96 | 464,207 |
| Countries and Territories of the United Kingdom | 0 | - | 4.89 | 93,917 |
| Counties of England Map Quiz | 0 | - | 4.97 | 307,158 |
| People on Money - England | 0 | - | 4.29 | 16,608 |
| Champions League Winners | 0 | - | 4.92 | 1,005,329 |
| Asian Geography By Letter - B | 0 | - | 4.85 | 66,435 |
| Monarchies of Asia | 0 | - | 4.97 | 71,027 |
| Biggest Countries in Europe in 1700 | 0 | - | 4.73 | 58,441 |
| Kings of France Quiz | 0 | - | 4.20 | 32,699 |
| Netherlands Country Quiz | 0 | - | 4.53 | 80,459 |
| Sweden Immigration by Country | 0 | - | 4.55 | 56,083 |
| 10 Closest Megacities to London | 0 | - | 4.90 | 17,679 |
| European Geography By Letter - E | 0 | - | 4.23 | 113,336 |
| European Geography By Letter - F | 0 | - | 4.17 | 92,657 |
| European Geography By Letter - H | 0 | - | 4.30 | 95,828 |
| European Geography By Letter - G | 0 | - | 4.27 | 102,475 |
| European Geography By Letter - I | 0 | - | 4.10 | 95,316 |
| European Geography By Letter - K | 0 | - | 4.14 | 69,962 |
| European Geography By Letter - O | 0 | - | 4.28 | 62,571 |
| European Geography by Letter - W | 0 | - | 4.20 | 82,809 |
| European Geography By Letter - S #2 | 0 | - | 4.19 | 51,067 |
| European Geography A-Z | 0 | - | 4.29 | 49,224 |
| Category Elimination - European Geography #1 | 0 | - | 4.98 | 232,903 |
| European Map without 10 Random Countries | 0 | - | 4.97 | 276,500 |
| Category Elimination - European Geography #2 | 0 | - | 4.99 | 166,887 |
| Andorra Country Quiz | 0 | - | 4.90 | 31,647 |
| France Cities Map Quiz | 0 | - | 4.96 | 166,583 |
| Word Chain - France | 0 | - | 4.38 | 42,762 |
| Germany Country Quiz | 0 | - | 4.82 | 157,706 |
| Germany Cities Map Quiz | 0 | - | 4.87 | 125,992 |
| Ancient Greek Trivia | 0 | - | 4.62 | 66,964 |
| Geography of Ancient Greece | 0 | - | 4.69 | 31,891 |
| Italy Country Quiz | 0 | - | 4.82 | 123,289 |
| Regions of Italy Map Quiz | 0 | - | 4.96 | 149,212 |
| Italy Cities Map Quiz | 0 | - | 4.97 | 151,884 |
| Italian Foods | 0 | - | 4.30 | 72,710 |
| Spain Cities Map Quiz | 0 | - | 4.87 | 96,795 |
| Regions of Spain Map Quiz | 0 | - | 4.95 | 185,495 |
| Canary Islands | 0 | - | 4.62 | 17,470 |
| Biggest Spanish Empire Countries | 0 | - | 4.91 | 115,847 |
| Switzerland Immigration by Country | 0 | - | 4.70 | 29,645 |
| British Spellings | 0 | - | 4.06 | 99,425 |
| British Groups of Things | 0 | - | 4.25 | 82,850 |
| British Acronyms | 0 | - | 4.40 | 45,778 |
| UK Immigration by Country | 0 | - | 4.94 | 140,775 |
| United Kingdom Decoder | 0 | - | 4.29 | 40,027 |
| United Kingdom Country Quiz | 0 | - | 4.96 | 139,608 |
| Modern-Day Countries of the British Empire in 1921 | 0 | - | 4.99 | 117,389 |
| Geography of Scotland | 0 | - | 4.63 | 21,604 |
| Famous Scottish People | 0 | - | 4.22 | 18,391 |
| All UEFA Champions League Teams Ever | 0 | - | 4.85 | 130,093 |
| European Countries with the Fewest Overnight Visitors | 0 | - | 4.80 | 41,648 |
| Word Scramble - European Countries | 0 | - | 4.73 | 141,584 |
| Top 20 Football Clubs in Europe | 0 | - | 4.48 | 114,716 |
| Name a Major European City A-Z | 0 | - | 4.33 | 49,470 |
| 100 Longest Rivers in Europe - with a Map | 0 | - | 4.94 | 65,391 |
| Slavic Languages | 0 | - | 4.68 | 54,310 |
| French Geography Quiz #1 | 0 | - | 4.89 | 34,745 |
| French History Multiple Choice | 0 | - | 4.55 | 33,013 |
| History of Germany | 0 | - | 4.39 | 52,794 |
| Letters of the Greek Alphabet | 0 | - | 4.97 | 646,644 |
| Name that Greek Letter | 0 | - | 4.93 | 323,254 |
| Capitals of Italian Regions | 0 | - | 4.62 | 36,588 |
| Spanish Immigration by Country | 0 | - | 4.63 | 55,439 |
| Most Common First Names in Spain | 0 | - | 4.27 | 45,597 |
| Modern Day Countries of the Spanish Empire on a Map | 0 | - | 4.95 | 86,174 |
| Most Common Surnames in the UK | 0 | - | 4.21 | 69,653 |
| Fictional Characters from Great Britain | 0 | - | 4.24 | 42,008 |
| Wonderwall Lyrics | 0 | - | 4.25 | 73,718 |
| Malta Country Quiz | 0 | - | 4.81 | 31,025 |
| Africa A-Z | 0 | - | 4.57 | 46,583 |
| African Countries by First 2 Letters | 0 | - | 4.96 | 268,014 |
| Top European Languages on a Map | 0 | - | 4.77 | 131,952 |
| Famous Russians | 0 | - | 4.16 | 23,831 |
| History of Russia Quiz | 0 | - | 4.47 | 31,899 |
| Russia Multiple Choice | 0 | - | 4.58 | 40,710 |
| Russian History A-Z | 0 | - | 4.38 | 31,645 |
| Movies Set in France | 0 | - | 4.26 | 13,118 |
| French Inventions | 0 | - | 4.08 | 13,892 |
| Country Quiz on a Map - France | 0 | - | 4.98 | 47,115 |
| History of Paris | 0 | - | 4.24 | 13,643 |
| Word Chain - Germany | 0 | - | 4.31 | 22,572 |
| Country Quiz on a Map - Germany | 0 | - | 4.95 | 34,967 |
| Ancient Greece A-Z | 0 | - | 4.60 | 23,125 |
| The Trojan War | 0 | - | 4.83 | 39,674 |
| Greek Mythology General Knowledge #1 | 0 | - | 4.85 | 111,666 |
| 101 Figures from Greek Mythology | 0 | - | 4.99 | 125,725 |
| Famous Irish People | 0 | - | 4.05 | 45,988 |
| History of Italy | 0 | - | 4.55 | 31,956 |
| Word Chain - Italy | 0 | - | 4.07 | 23,156 |
| Italy Multiple Choice | 0 | - | 4.74 | 103,710 |
| Embarrassing Chapters in Italian History | 0 | - | 4.24 | 12,091 |
| Ancient Roman Trivia #1 | 0 | - | 4.85 | 84,464 |
| Roman Emperors | 0 | - | 4.95 | 119,791 |
| Countries of the Spanish Empire | 0 | - | 4.52 | 77,197 |
| Word Chain - United Kingdom | 0 | - | 4.05 | 29,333 |
| Name a Valid English City | 0 | - | 4.19 | 16,711 |
| London A-Z | 0 | - | 4.10 | 40,749 |
| Asian Cities A-Z by Clue | 0 | - | 4.49 | 35,485 |
| Asian Countries by First 2 Letters | 0 | - | 4.91 | 278,853 |
| Major non-NATO U.S. Allies | 0 | - | 4.52 | 52,135 |
| Europe Map Quiz | 0 | - | 5.00 | 4,758,571 |
| Europe Geography Quiz #1 | 0 | - | 4.55 | 71,235 |
| Europe Geography Quiz #2 | 0 | - | 4.57 | 71,899 |
| Europe Geography Quiz #4 | 0 | - | 4.57 | 70,188 |
| Europe Geography Quiz #5 | 0 | - | 4.55 | 61,208 |
| Four Letter European Geography #2 | 0 | - | 4.57 | 20,396 |
| Capitals of French Regions | 0 | - | 4.45 | 16,055 |
| Capitals of German States | 0 | - | 4.74 | 28,941 |
| Chancellors of Germany, 1949–present | 0 | - | 4.60 | 23,302 |
| Olympian Gods Quiz | 0 | - | 4.96 | 500,240 |
| Ancient Greek Words | 0 | - | 4.93 | 111,453 |
| British to American Food Translation | 0 | - | 3.38 | 51,954 |
| Things British People Know that Americans Don't | 0 | - | 4.25 | 51,425 |
| Name Every Beatles Song | 0 | - | 4.97 | 235,901 |
| Bohemian Rhapsody Lyrics | 0 | - | 4.98 | 291,555 |
| Asian Geography By Letter - A | 0 | - | 4.64 | 71,093 |
| Asian Geography by Letter - H | 0 | - | 4.50 | 65,651 |
| Asian Geography By Letter - M | 0 | - | 4.47 | 61,381 |
| Asian Geography by Letter - P | 0 | - | 4.45 | 57,847 |
| Asian Geography by Letter - T | 0 | - | 4.51 | 57,326 |
| Asian Geography By Letter - L | 0 | - | 4.49 | 42,983 |
| Asian Geography By Letter - O | 0 | - | 4.65 | 31,807 |
| Middle East A-Z | 0 | - | 4.47 | 45,995 |
| 100 Most Common English Words | 0 | - | 4.88 | 1,315,067 |
| Africa Map Quiz | 0 | - | 5.00 | 2,116,014 |
| Oceania Map Quiz | 0 | - | 4.98 | 641,311 |
| Australian Capitals | 0 | - | 4.92 | 62,709 |
| Canada A-Z | 0 | - | 4.73 | 32,797 |
