| States of Germany | 0 | - | 4.96 | 151,078 |
| Germany Immigration by Country | 0 | - | 4.85 | 80,482 |
| Germany Multiple Choice | 0 | - | 4.84 | 54,195 |
| States of the German Confederation in 1848 | 0 | - | 4.89 | 31,741 |
| European Countries by First 2 Letters | 0 | - | 4.95 | 527,765 |
| Regions of Italy | 0 | - | 4.92 | 75,204 |
| Netherlands Immigration by Country | 0 | - | 4.94 | 47,783 |
| Regions of Spain Quiz | 0 | - | 4.90 | 113,171 |
| Cantons of Switzerland | 0 | - | 4.98 | 50,726 |
| Save Europeans by Guessing Countries | 0 | - | 4.83 | 211,011 |
| Famous Germans | 0 | - | 4.50 | 54,831 |
| German Groups of Things | 0 | - | 4.46 | 38,381 |
| Germany True or False? | 0 | - | 4.61 | 48,662 |
| Departments of France | 0 | - | 4.93 | 53,300 |
| Countries Surrounding Rome | 0 | - | 4.97 | 49,437 |
| England or Wales? | 0 | - | 4.94 | 45,488 |
| Count to 10 in Europe: Pro | 0 | - | 4.86 | 68,850 |
| Official European Union Languages | 0 | - | 4.97 | 237,657 |
| European Countries in their Native Language | 0 | - | 4.99 | 157,311 |
| Europe by Borders in 30 Seconds | 0 | - | 4.98 | 426,545 |
| Country Quiz on a Map - Germany | 0 | - | 4.95 | 34,748 |
| Letters of the Greek Alphabet | 0 | - | 4.97 | 644,598 |
| Name that Greek Letter | 0 | - | 4.93 | 322,537 |
| Europe Geography Decoder | 0 | - | 4.86 | 69,745 |
| Top European Languages on a Map | 0 | - | 4.77 | 131,570 |
| Countries that Beat Switzerland | 0 | - | 4.88 | 41,667 |
| Top African Languages on a Map | 0 | - | 4.92 | 73,209 |
| Top 10 Languages Spoken in Europe | 0 | - | 4.96 | 217,420 |
| Most Guessed Cities in Europe - Not Capitals | 0 | - | 4.82 | 87,098 |
| Countries of Europe with an Empty Map | 0 | - | 5.00 | 309,301 |
| All First-Level Subdivisions of Europe on a Map | 0 | - | 4.98 | 169,457 |
| History of Germany | 0 | - | 4.39 | 52,724 |
| Counties of England | 0 | - | 4.97 | 792,549 |
| "Big Five" European Soccer Champions Since 2000 | 0 | - | 4.97 | 352,484 |
| Top Asian Languages on a Map | 0 | - | 4.95 | 71,026 |
| Add A Letter - Make a European City | 0 | - | 4.90 | 23,316 |
| Celtic Nations | 0 | - | 4.69 | 46,872 |
| Regions of France | 0 | - | 4.77 | 119,964 |
| France Immigration by Country | 0 | - | 4.72 | 76,197 |
| Capitals of German States | 0 | - | 4.74 | 28,893 |
| Chancellors of Germany, 1949–present | 0 | - | 4.60 | 23,200 |
| Largest Islands of Greece | 0 | - | 4.59 | 47,723 |
| Famous Italians by Clue | 0 | - | 4.45 | 88,882 |
| Provinces of the Netherlands | 0 | - | 4.80 | 41,060 |
| 100 Greatest Britons Quiz | 0 | - | 4.41 | 48,155 |
| UK Cities Map Quiz | 0 | - | 4.96 | 463,280 |
| Foods in a Full English Breakfast | 0 | - | 4.46 | 102,825 |
| The UK for Americans - True or False | 0 | - | 4.43 | 58,503 |
| Champions League Winners | 0 | - | 4.92 | 1,000,668 |
| European Geography By Letter - P #1 | 0 | - | 4.81 | 96,619 |
| Catholic Countries in Europe | 0 | - | 4.83 | 94,591 |
| European Geography By Letter - B #2 | 0 | - | 4.84 | 76,685 |
| Category Elimination - European Geography #3 | 0 | - | 4.85 | 80,332 |
| Federal Subjects of Russia | 0 | - | 4.94 | 145,301 |
| Regions of France Map Quiz | 0 | - | 4.97 | 143,766 |
| States of Germany Map Quiz | 0 | - | 4.91 | 132,146 |
| Biggest Cities in Germany in 1910 | 0 | - | 4.41 | 23,423 |
| Word Chain - Germany | 0 | - | 4.31 | 22,525 |
| Sweden Immigration by Country | 0 | - | 4.55 | 55,866 |
| Languages of the United Kingdom | 0 | - | 4.13 | 40,812 |
| Countries and Territories of the United Kingdom | 0 | - | 4.89 | 93,344 |
| Counties of England Map Quiz | 0 | - | 4.97 | 306,657 |
| United Kingdom A-Z | 0 | - | 4.53 | 87,437 |
| 10 Closest Megacities to London | 0 | - | 4.90 | 17,618 |
| Top 10 Non-English Languages Spoken in New York City | 0 | - | 4.85 | 65,904 |
| Biggest Countries in Europe in 1700 | 0 | - | 4.73 | 58,294 |
| Category Elimination - European Geography #1 | 0 | - | 4.98 | 231,770 |
| European Map without 10 Random Countries | 0 | - | 4.97 | 275,717 |
| Category Elimination - European Geography #2 | 0 | - | 4.99 | 166,076 |
| France Cities Map Quiz | 0 | - | 4.96 | 165,699 |
| Word Chain - France | 0 | - | 4.38 | 42,675 |
| Germany Country Quiz | 0 | - | 4.82 | 157,178 |
| Germany Cities Map Quiz | 0 | - | 4.87 | 125,555 |
| Ancient Greek Trivia | 0 | - | 4.62 | 66,870 |
| Geography of Ancient Greece | 0 | - | 4.69 | 31,841 |
| Italy Country Quiz | 0 | - | 4.82 | 122,672 |
| Regions of Italy Map Quiz | 0 | - | 4.96 | 148,820 |
| Italy Cities Map Quiz | 0 | - | 4.97 | 151,460 |
| Italian Foods | 0 | - | 4.31 | 72,449 |
| The Mafia Quiz | 0 | - | 4.46 | 23,252 |
| History of The Netherlands | 0 | - | 4.46 | 17,359 |
| Spain Cities Map Quiz | 0 | - | 4.87 | 96,417 |
| Regions of Spain Map Quiz | 0 | - | 4.95 | 185,042 |
| Canary Islands | 0 | - | 4.61 | 17,438 |
| Biggest Spanish Empire Countries | 0 | - | 4.91 | 115,426 |
| Switzerland Immigration by Country | 0 | - | 4.70 | 29,404 |
| British Spellings | 0 | - | 4.06 | 99,355 |
| British Groups of Things | 0 | - | 4.25 | 82,777 |
| British Acronyms | 0 | - | 4.39 | 45,702 |
| UK Immigration by Country | 0 | - | 4.94 | 140,315 |
| United Kingdom Decoder | 0 | - | 4.29 | 39,993 |
| United Kingdom Country Quiz | 0 | - | 4.96 | 138,956 |
| Modern-Day Countries of the British Empire in 1921 | 0 | - | 4.99 | 116,856 |
| Geography of Scotland | 0 | - | 4.63 | 21,547 |
| All UEFA Champions League Teams Ever | 0 | - | 4.85 | 129,244 |
| Countries with the Most Arabic Speakers | 0 | - | 4.92 | 79,742 |
| Pre-Euro Currencies | 0 | - | 4.44 | 52,509 |
| European Countries with the Fewest Overnight Visitors | 0 | - | 4.78 | 41,626 |
| Word Scramble - European Countries | 0 | - | 4.70 | 141,282 |
| Top 20 Football Clubs in Europe | 0 | - | 4.48 | 113,832 |
| 100 Longest Rivers in Europe - with a Map | 0 | - | 4.94 | 65,126 |
| Slavic Languages | 0 | - | 4.68 | 54,151 |
| Countries With the Most Russian Speakers | 0 | - | 4.97 | 99,531 |
| French Geography Quiz #1 | 0 | - | 4.89 | 34,633 |
| Andorra Country Quiz | 0 | - | 4.90 | 31,530 |
| Famous Swiss and Austrian People | 0 | - | 4.45 | 14,589 |
| Famous Dutch and Belgian People | 0 | - | 4.56 | 18,000 |
| France A-Z | 0 | - | 4.16 | 38,113 |
| Country Quiz on a Map - France | 0 | - | 4.98 | 46,872 |
| French History Multiple Choice | 0 | - | 4.55 | 32,946 |
| Geography of Germany | 0 | - | 4.35 | 17,137 |
| The Trojan War | 0 | - | 4.83 | 39,564 |
| Greek Mythology General Knowledge #1 | 0 | - | 4.85 | 111,162 |
| Capitals of Italian Regions | 0 | - | 4.62 | 36,521 |
| Ancient Roman Trivia #1 | 0 | - | 4.85 | 84,283 |
| Roman Emperors | 0 | - | 4.95 | 119,238 |
| Spanish Immigration by Country | 0 | - | 4.63 | 55,356 |
| Most Common First Names in Spain | 0 | - | 4.27 | 45,538 |
| Languages of Spain | 0 | - | 4.36 | 23,235 |
| Switzerland A-Z | 0 | - | 4.45 | 25,578 |
| Most Common Surnames in the UK | 0 | - | 4.21 | 69,564 |
| Fictional Characters from Great Britain | 0 | - | 4.24 | 41,968 |
| Wonderwall Lyrics | 0 | - | 4.25 | 73,575 |
| Malta Country Quiz | 0 | - | 4.81 | 30,936 |
| History of Russia Quiz | 0 | - | 4.49 | 31,844 |
| Russia Multiple Choice | 0 | - | 4.58 | 40,641 |
| Famous French People | 0 | - | 4.12 | 28,137 |
| Movies Set in France | 0 | - | 4.26 | 13,096 |
| French Inventions | 0 | - | 4.08 | 13,876 |
| History of Paris | 0 | - | 4.24 | 13,629 |
| Olympian Gods Quiz | 0 | - | 4.96 | 498,406 |
| 101 Figures from Greek Mythology | 0 | - | 4.99 | 125,069 |
| History of Italy | 0 | - | 4.55 | 31,897 |
| Word Chain - Italy | 0 | - | 4.07 | 23,135 |
| Italy Multiple Choice | 0 | - | 4.73 | 103,439 |
| Embarrassing Chapters in Italian History | 0 | - | 4.24 | 12,067 |
| Geography of the Dutch Empire | 0 | - | 4.61 | 34,566 |
| Famous Nordic People | 0 | - | 4.34 | 19,979 |
| Famous Spaniards Quiz | 0 | - | 4.24 | 11,567 |
| Countries of the Spanish Empire | 0 | - | 4.52 | 77,092 |
| Word Chain - United Kingdom | 0 | - | 4.05 | 29,300 |
| The British Royal Family - Modern Times | 0 | - | 4.16 | 21,499 |
| People on Money - England | 0 | - | 4.29 | 16,590 |
| Name a Valid English City | 0 | - | 4.19 | 16,672 |
| English Monarchs in Order by First Letter | 0 | - | 4.38 | 31,505 |
| African Countries by First 2 Letters | 0 | - | 4.96 | 267,391 |
| European Geography By Letter - A | 0 | - | 4.61 | 132,678 |
| European Geography By Letter - B #1 | 0 | - | 4.67 | 111,132 |
| European Geography By Letter - C | 0 | - | 4.46 | 112,108 |
| European Geography By Letter - D | 0 | - | 4.50 | 106,989 |
| European Geography By Letter - L | 0 | - | 4.52 | 112,444 |
| European Geography By Letter - M | 0 | - | 4.64 | 129,323 |
| European Geography By Letter - N | 0 | - | 4.44 | 100,030 |
| European Geography By Letter - R | 0 | - | 4.42 | 92,806 |
| European Geography By Letter - V | 0 | - | 4.43 | 92,440 |
| European Geography By Letter - T | 0 | - | 4.41 | 81,607 |
| Europe Map Quiz | 0 | - | 5.00 | 4,745,807 |
| Europe Geography Quiz #1 | 0 | - | 4.54 | 71,129 |
| Europe Geography Quiz #2 | 0 | - | 4.57 | 71,774 |
| Europe Geography Quiz #4 | 0 | - | 4.57 | 70,078 |
| Europe Geography Quiz #5 | 0 | - | 4.54 | 61,120 |
| European Geography By Letter - S #1 | 0 | - | 4.63 | 99,799 |
| Top 10 European Countries by English Proficiency | 0 | - | 4.73 | 65,532 |
| Four Letter European Geography #2 | 0 | - | 4.57 | 20,235 |
| Capitals of French Regions | 0 | - | 4.45 | 16,017 |
| Kings of France Quiz | 0 | - | 4.20 | 32,630 |
| German Loan Words | 0 | - | 4.27 | 135,615 |
| German History A-Z | 0 | - | 4.49 | 24,518 |
| German Inventions | 0 | - | 3.91 | 30,208 |
| Embarrassing Chapters in German History | 0 | - | 3.41 | 12,597 |
| Ancient Greek Words | 0 | - | 4.93 | 111,096 |
| Two Letter Roman Numerals | 0 | - | 4.97 | 55,834 |
| British to American Food Translation | 0 | - | 3.38 | 51,907 |
| Things British People Know that Americans Don't | 0 | - | 4.25 | 51,357 |
| The Thirteen Dwarves in the Hobbit | 0 | - | 4.81 | 28,462 |
| Name Every Beatles Song | 0 | - | 4.97 | 235,042 |
| Bohemian Rhapsody Lyrics | 0 | - | 4.98 | 291,131 |
| Famous Scottish People | 0 | - | 4.22 | 18,356 |
| Asian Countries by First 2 Letters | 0 | - | 4.91 | 278,154 |
| Africa Map Quiz | 0 | - | 5.00 | 2,110,610 |
| Oceania Map Quiz | 0 | - | 4.98 | 638,560 |
| Australian Capitals | 0 | - | 4.92 | 62,657 |
| European Physical Geography | 0 | - | 4.26 | 33,423 |
| Geography of Russia | 0 | - | 4.57 | 21,479 |
| Slovakia... or Slovenia? | 0 | - | 4.69 | 41,854 |
| History of Austria | 0 | - | 4.70 | 17,800 |
| Austria Country Quiz | 0 | - | 4.57 | 59,531 |
| Belgium Country Quiz | 0 | - | 4.70 | 71,487 |
| France Country Quiz | 0 | - | 4.70 | 134,486 |
| Biggest French Empire Countries | 0 | - | 4.49 | 65,035 |
| Geography of the French Empire | 0 | - | 4.45 | 26,999 |
| The French Revolution | 0 | - | 4.46 | 23,861 |
| France Multiple Choice | 0 | - | 4.38 | 40,680 |
| Tour de France Winners | 0 | - | 4.27 | 15,289 |
| History of France | 0 | - | 4.59 | 56,625 |
| Bundesliga Champions | 0 | - | 4.24 | 56,049 |
| All Bundesliga Teams Ever | 0 | - | 4.35 | 45,284 |
| Greece Country Quiz | 0 | - | 4.74 | 65,983 |
| Figures from Greek Mythology | 0 | - | 4.91 | 185,847 |
| Roman Numeral Decoding Quiz | 0 | - | 4.94 | 435,138 |
