| States of Germany | 0 | - | 4.95 | 153,299 |
| Germany Immigration by Country | 0 | - | 4.85 | 81,307 |
| Germany Multiple Choice | 0 | - | 4.84 | 54,490 |
| States of the German Confederation in 1848 | 0 | - | 4.90 | 32,214 |
| European Countries by First 2 Letters | 0 | - | 4.95 | 530,731 |
| Regions of Italy | 0 | - | 4.92 | 76,304 |
| Netherlands Immigration by Country | 0 | - | 4.93 | 52,460 |
| Regions of Spain Quiz | 0 | - | 4.90 | 114,467 |
| Cantons of Switzerland | 0 | - | 4.98 | 51,431 |
| Save Europeans by Guessing Countries | 0 | - | 4.86 | 214,732 |
| Famous Germans | 0 | - | 4.50 | 55,544 |
| German Groups of Things | 0 | - | 4.46 | 38,530 |
| Germany True or False? | 0 | - | 4.61 | 48,899 |
| Departments of France | 0 | - | 4.93 | 54,511 |
| Countries Surrounding Rome | 0 | - | 4.97 | 49,621 |
| England or Wales? | 0 | - | 4.94 | 45,812 |
| Count to 10 in Europe: Pro | 0 | - | 4.86 | 69,351 |
| Official European Union Languages | 0 | - | 4.97 | 238,972 |
| European Countries in their Native Language | 0 | - | 4.99 | 158,164 |
| Europe by Borders in 30 Seconds | 0 | - | 4.98 | 429,168 |
| Country Quiz on a Map - Germany | 0 | - | 4.95 | 35,217 |
| Letters of the Greek Alphabet | 0 | - | 4.97 | 649,071 |
| Name that Greek Letter | 0 | - | 4.93 | 324,222 |
| Europe Geography Decoder | 0 | - | 4.86 | 70,122 |
| Top European Languages on a Map | 0 | - | 4.77 | 132,379 |
| Countries that Beat Switzerland | 0 | - | 4.88 | 41,921 |
| Top 10 Languages Spoken in Europe | 0 | - | 4.96 | 219,475 |
| Most Guessed Cities in Europe - Not Capitals | 0 | - | 4.82 | 87,551 |
| Countries of Europe with an Empty Map | 0 | - | 5.00 | 311,475 |
| All First-Level Subdivisions of Europe on a Map | 0 | - | 4.98 | 173,343 |
| History of Germany | 0 | - | 4.39 | 52,906 |
| Counties of England | 0 | - | 4.97 | 799,175 |
| "Big Five" European Soccer Champions Since 2000 | 0 | - | 4.97 | 358,350 |
| Top Asian Languages on a Map | 0 | - | 4.95 | 71,674 |
| Top African Languages on a Map | 0 | - | 4.92 | 74,499 |
| Add A Letter - Make a European City | 0 | - | 4.90 | 23,435 |
| Celtic Nations | 0 | - | 4.69 | 47,003 |
| Regions of France | 0 | - | 4.72 | 121,288 |
| France Immigration by Country | 0 | - | 4.70 | 76,696 |
| Capitals of German States | 0 | - | 4.74 | 28,990 |
| Chancellors of Germany, 1949–present | 0 | - | 4.60 | 23,406 |
| Largest Islands of Greece | 0 | - | 4.59 | 48,155 |
| Famous Italians by Clue | 0 | - | 4.45 | 89,847 |
| Provinces of the Netherlands | 0 | - | 4.80 | 41,511 |
| 100 Greatest Britons Quiz | 0 | - | 4.41 | 48,346 |
| UK Cities Map Quiz | 0 | - | 4.96 | 465,269 |
| Foods in a Full English Breakfast | 0 | - | 4.46 | 103,466 |
| The UK for Americans - True or False | 0 | - | 4.43 | 58,698 |
| Champions League Winners | 0 | - | 4.92 | 1,010,187 |
| European Geography By Letter - P #1 | 0 | - | 4.81 | 97,976 |
| Catholic Countries in Europe | 0 | - | 4.83 | 95,419 |
| European Geography By Letter - B #2 | 0 | - | 4.86 | 87,071 |
| Category Elimination - European Geography #3 | 0 | - | 4.86 | 81,356 |
| Federal Subjects of Russia | 0 | - | 4.95 | 148,090 |
| Regions of France Map Quiz | 0 | - | 4.97 | 144,892 |
| States of Germany Map Quiz | 0 | - | 4.92 | 133,252 |
| Word Chain - Germany | 0 | - | 4.31 | 22,631 |
| Sweden Immigration by Country | 0 | - | 4.55 | 56,220 |
| Languages of the United Kingdom | 0 | - | 4.13 | 40,958 |
| Countries and Territories of the United Kingdom | 0 | - | 4.90 | 94,178 |
| Counties of England Map Quiz | 0 | - | 4.97 | 308,233 |
| United Kingdom A-Z | 0 | - | 4.52 | 88,173 |
| 10 Closest Megacities to London | 0 | - | 4.90 | 17,759 |
| Top 10 Non-English Languages Spoken in New York City | 0 | - | 4.85 | 66,422 |
| Biggest Countries in Europe in 1700 | 0 | - | 4.73 | 58,592 |
| Category Elimination - European Geography #1 | 0 | - | 4.98 | 234,000 |
| European Map without 10 Random Countries | 0 | - | 4.97 | 277,431 |
| Category Elimination - European Geography #2 | 0 | - | 4.99 | 167,702 |
| Andorra Country Quiz | 0 | - | 4.91 | 31,792 |
| Famous French People | 0 | - | 4.07 | 35,874 |
| France Cities Map Quiz | 0 | - | 4.96 | 167,208 |
| Word Chain - France | 0 | - | 4.38 | 42,851 |
| Germany Country Quiz | 0 | - | 4.83 | 158,218 |
| Germany Cities Map Quiz | 0 | - | 4.87 | 126,668 |
| Ancient Greek Trivia | 0 | - | 4.62 | 67,086 |
| Geography of Ancient Greece | 0 | - | 4.69 | 31,951 |
| Regions of Italy Map Quiz | 0 | - | 4.96 | 149,700 |
| Italy Cities Map Quiz | 0 | - | 4.97 | 152,641 |
| Italian Foods | 0 | - | 4.30 | 72,960 |
| The Mafia Quiz | 0 | - | 4.46 | 23,375 |
| History of The Netherlands | 0 | - | 4.46 | 17,489 |
| Spain Cities Map Quiz | 0 | - | 4.87 | 97,134 |
| Regions of Spain Map Quiz | 0 | - | 4.95 | 186,266 |
| Canary Islands | 0 | - | 4.62 | 17,494 |
| Biggest Spanish Empire Countries | 0 | - | 4.91 | 116,295 |
| Switzerland Immigration by Country | 0 | - | 4.69 | 29,837 |
| British Spellings | 0 | - | 4.06 | 99,514 |
| British Groups of Things | 0 | - | 4.25 | 82,916 |
| British Acronyms | 0 | - | 4.40 | 45,856 |
| UK Immigration by Country | 0 | - | 4.94 | 141,191 |
| United Kingdom Decoder | 0 | - | 4.29 | 40,059 |
| United Kingdom Country Quiz | 0 | - | 4.96 | 140,243 |
| Modern-Day Countries of the British Empire in 1921 | 0 | - | 4.99 | 118,036 |
| English Monarchs in Order by First Letter | 0 | - | 4.38 | 31,965 |
| Geography of Scotland | 0 | - | 4.63 | 21,666 |
| All UEFA Champions League Teams Ever | 0 | - | 4.85 | 131,073 |
| Countries with the Most Arabic Speakers | 0 | - | 4.92 | 80,429 |
| Pre-Euro Currencies | 0 | - | 4.44 | 52,654 |
| European Countries with the Fewest Overnight Visitors | 0 | - | 4.80 | 41,676 |
| Word Scramble - European Countries | 0 | - | 4.73 | 141,911 |
| Top 20 Football Clubs in Europe | 0 | - | 4.48 | 115,691 |
| 100 Longest Rivers in Europe - with a Map | 0 | - | 4.94 | 65,658 |
| Slavic Languages | 0 | - | 4.68 | 54,481 |
| Countries With the Most Russian Speakers | 0 | - | 4.97 | 101,599 |
| French Geography Quiz #1 | 0 | - | 4.89 | 34,869 |
| Famous Swiss and Austrian People | 0 | - | 4.45 | 14,646 |
| Famous Dutch and Belgian People | 0 | - | 4.56 | 18,091 |
| France A-Z | 0 | - | 4.16 | 38,272 |
| Country Quiz on a Map - France | 0 | - | 4.98 | 47,382 |
| French History Multiple Choice | 0 | - | 4.55 | 33,133 |
| Biggest Cities in Germany in 1910 | 0 | - | 4.40 | 23,512 |
| Geography of Germany | 0 | - | 4.35 | 17,211 |
| The Trojan War | 0 | - | 4.83 | 39,808 |
| Greek Mythology General Knowledge #1 | 0 | - | 4.85 | 112,290 |
| Capitals of Italian Regions | 0 | - | 4.62 | 36,666 |
| Ancient Roman Trivia #1 | 0 | - | 4.85 | 84,664 |
| Roman Emperors | 0 | - | 4.95 | 120,435 |
| Spanish Immigration by Country | 0 | - | 4.63 | 55,517 |
| Most Common First Names in Spain | 0 | - | 4.27 | 45,663 |
| Languages of Spain | 0 | - | 4.36 | 23,354 |
| Modern Day Countries of the Spanish Empire on a Map | 0 | - | 4.95 | 86,538 |
| Switzerland A-Z | 0 | - | 4.45 | 25,694 |
| Most Common Surnames in the UK | 0 | - | 4.22 | 69,782 |
| Fictional Characters from Great Britain | 0 | - | 4.24 | 42,051 |
| Wonderwall Lyrics | 0 | - | 4.25 | 73,883 |
| Malta Country Quiz | 0 | - | 4.81 | 31,120 |
| History of Russia Quiz | 0 | - | 4.47 | 31,957 |
| Russia Multiple Choice | 0 | - | 4.58 | 40,783 |
| Movies Set in France | 0 | - | 4.26 | 13,135 |
| French Inventions | 0 | - | 4.10 | 13,910 |
| History of Paris | 0 | - | 4.24 | 13,662 |
| Olympian Gods Quiz | 0 | - | 4.96 | 502,018 |
| 101 Figures from Greek Mythology | 0 | - | 4.99 | 126,562 |
| History of Italy | 0 | - | 4.55 | 32,062 |
| Word Chain - Italy | 0 | - | 4.07 | 23,191 |
| Italy Multiple Choice | 0 | - | 4.74 | 103,985 |
| Embarrassing Chapters in Italian History | 0 | - | 4.24 | 12,131 |
| Geography of the Dutch Empire | 0 | - | 4.61 | 34,725 |
| Famous Nordic People | 0 | - | 4.34 | 20,177 |
| Famous Spaniards Quiz | 0 | - | 4.24 | 11,624 |
| Countries of the Spanish Empire | 0 | - | 4.52 | 77,302 |
| Word Chain - United Kingdom | 0 | - | 4.05 | 29,364 |
| The British Royal Family - Modern Times | 0 | - | 4.16 | 21,547 |
| People on Money - England | 0 | - | 4.29 | 16,625 |
| Name a Valid English City | 0 | - | 4.19 | 16,756 |
| European Geography By Letter - A | 0 | - | 4.52 | 147,021 |
| European Geography By Letter - B #1 | 0 | - | 4.67 | 120,413 |
| European Geography By Letter - C | 0 | - | 4.46 | 114,813 |
| European Geography By Letter - D | 0 | - | 4.50 | 109,362 |
| European Geography By Letter - L | 0 | - | 4.52 | 114,033 |
| European Geography By Letter - M | 0 | - | 4.67 | 131,357 |
| European Geography By Letter - N | 0 | - | 4.44 | 101,228 |
| European Geography By Letter - R | 0 | - | 4.42 | 94,038 |
| European Geography By Letter - V | 0 | - | 4.42 | 93,303 |
| European Geography By Letter - T | 0 | - | 4.41 | 82,867 |
| Europe Map Quiz | 0 | - | 5.00 | 4,772,389 |
| Europe Geography Quiz #1 | 0 | - | 4.55 | 71,363 |
| Europe Geography Quiz #2 | 0 | - | 4.57 | 72,023 |
| Europe Geography Quiz #4 | 0 | - | 4.57 | 70,315 |
| Europe Geography Quiz #5 | 0 | - | 4.55 | 61,304 |
| European Geography By Letter - S #1 | 0 | - | 4.63 | 100,907 |
| Top 10 European Countries by English Proficiency | 0 | - | 4.74 | 65,826 |
| Four Letter European Geography #2 | 0 | - | 4.57 | 20,560 |
| Capitals of French Regions | 0 | - | 4.45 | 16,117 |
| Kings of France Quiz | 0 | - | 4.20 | 32,825 |
| German Loan Words | 0 | - | 4.28 | 139,142 |
| German History A-Z | 0 | - | 4.49 | 24,668 |
| German Inventions | 0 | - | 3.91 | 30,254 |
| Embarrassing Chapters in German History | 0 | - | 3.40 | 12,650 |
| Ancient Greek Words | 0 | - | 4.93 | 111,936 |
| Two Letter Roman Numerals | 0 | - | 4.97 | 56,290 |
| British to American Food Translation | 0 | - | 3.38 | 51,986 |
| Things British People Know that Americans Don't | 0 | - | 4.25 | 51,497 |
| The Thirteen Dwarves in the Hobbit | 0 | - | 4.81 | 28,728 |
| Name Every Beatles Song | 0 | - | 4.97 | 237,148 |
| Bohemian Rhapsody Lyrics | 0 | - | 4.98 | 292,140 |
| Famous Scottish People | 0 | - | 4.22 | 18,415 |
| Asian Countries by First 2 Letters | 0 | - | 4.91 | 279,745 |
| African Countries by First 2 Letters | 0 | - | 4.96 | 268,641 |
| Oceania Map Quiz | 0 | - | 4.98 | 654,372 |
| Australian Capitals | 0 | - | 4.92 | 62,760 |
| European Physical Geography | 0 | - | 4.26 | 33,542 |
| Geography of Russia | 0 | - | 4.57 | 21,556 |
| Slovakia... or Slovenia? | 0 | - | 4.69 | 42,023 |
| History of Austria | 0 | - | 4.70 | 17,912 |
| Austria Country Quiz | 0 | - | 4.57 | 59,853 |
| Belgium Country Quiz | 0 | - | 4.72 | 71,962 |
| France Country Quiz | 0 | - | 4.70 | 135,221 |
| Biggest French Empire Countries | 0 | - | 4.49 | 65,244 |
| Geography of the French Empire | 0 | - | 4.45 | 27,157 |
| The French Revolution | 0 | - | 4.47 | 24,070 |
| France Multiple Choice | 0 | - | 4.39 | 40,774 |
| Tour de France Winners | 0 | - | 4.27 | 15,419 |
| History of France | 0 | - | 4.59 | 57,298 |
| Bundesliga Champions | 0 | - | 4.25 | 56,851 |
| All Bundesliga Teams Ever | 0 | - | 4.35 | 45,758 |
| Greece Country Quiz | 0 | - | 4.74 | 66,385 |
| Figures from Greek Mythology | 0 | - | 4.91 | 187,798 |
| Italy Country Quiz | 0 | - | 4.77 | 123,639 |
| Roman Numeral Decoding Quiz | 0 | - | 4.94 | 438,155 |
