| States of Germany | 0 | - | 4.96 | 150,698 |
| Germany Immigration by Country | 0 | - | 4.85 | 80,223 |
| European Countries by First 2 Letters | 0 | - | 4.95 | 527,069 |
| Germany Multiple Choice | 0 | - | 4.84 | 54,135 |
| States of the German Confederation in 1848 | 0 | - | 4.89 | 31,667 |
| Save Europeans by Guessing Countries | 0 | - | 4.84 | 210,406 |
| Regions of Italy | 0 | - | 4.92 | 74,999 |
| Netherlands Immigration by Country | 0 | - | 4.94 | 43,999 |
| Regions of Spain Quiz | 0 | - | 4.90 | 112,837 |
| Cantons of Switzerland | 0 | - | 4.98 | 50,554 |
| Departments of France | 0 | - | 4.93 | 53,084 |
| Famous Germans | 0 | - | 4.50 | 54,753 |
| German Groups of Things | 0 | - | 4.46 | 38,353 |
| Germany True or False? | 0 | - | 4.61 | 48,608 |
| Countries Surrounding Rome | 0 | - | 4.97 | 49,409 |
| England or Wales? | 0 | - | 4.94 | 45,425 |
| Count to 10 in Europe: Pro | 0 | - | 4.86 | 68,752 |
| Official European Union Languages | 0 | - | 4.97 | 237,341 |
| European Countries in their Native Language | 0 | - | 4.99 | 157,138 |
| Europe by Borders in 30 Seconds | 0 | - | 4.98 | 425,963 |
| Letters of the Greek Alphabet | 0 | - | 4.97 | 643,494 |
| Name that Greek Letter | 0 | - | 4.94 | 322,156 |
| Europe Geography Decoder | 0 | - | 4.86 | 69,656 |
| Country Quiz on a Map - Germany | 0 | - | 4.95 | 34,614 |
| Countries that Beat Switzerland | 0 | - | 4.88 | 41,628 |
| Top European Languages on a Map | 0 | - | 4.77 | 131,410 |
| Top African Languages on a Map | 0 | - | 4.92 | 72,932 |
| Add A Letter - Make a European City | 0 | - | 4.90 | 23,270 |
| Celtic Nations | 0 | - | 4.69 | 46,848 |
| Top 10 Languages Spoken in Europe | 0 | - | 4.96 | 216,964 |
| Most Guessed Cities in Europe - Not Capitals | 0 | - | 4.82 | 86,997 |
| Countries of Europe with an Empty Map | 0 | - | 5.00 | 308,845 |
| All First-Level Subdivisions of Europe on a Map | 0 | - | 4.98 | 168,886 |
| Regions of France | 0 | - | 4.78 | 119,662 |
| France Immigration by Country | 0 | - | 4.72 | 76,088 |
| Capitals of German States | 0 | - | 4.74 | 28,870 |
| Chancellors of Germany, 1949–present | 0 | - | 4.60 | 23,157 |
| History of Germany | 0 | - | 4.39 | 52,678 |
| Largest Islands of Greece | 0 | - | 4.59 | 47,624 |
| Famous Italians by Clue | 0 | - | 4.45 | 88,739 |
| Provinces of the Netherlands | 0 | - | 4.80 | 40,951 |
| 100 Greatest Britons Quiz | 0 | - | 4.41 | 48,107 |
| Counties of England | 0 | - | 4.97 | 791,233 |
| Foods in a Full English Breakfast | 0 | - | 4.46 | 102,260 |
| The UK for Americans - True or False | 0 | - | 4.43 | 58,455 |
| "Big Five" European Soccer Champions Since 2000 | 0 | - | 4.97 | 351,479 |
| Top Asian Languages on a Map | 0 | - | 4.95 | 70,886 |
| European Geography By Letter - P #1 | 0 | - | 4.81 | 96,528 |
| Catholic Countries in Europe | 0 | - | 4.83 | 94,432 |
| European Geography By Letter - B #2 | 0 | - | 4.84 | 76,531 |
| Category Elimination - European Geography #3 | 0 | - | 4.85 | 80,092 |
| Federal Subjects of Russia | 0 | - | 4.94 | 144,793 |
| Regions of France Map Quiz | 0 | - | 4.97 | 143,524 |
| States of Germany Map Quiz | 0 | - | 4.91 | 132,001 |
| Word Chain - Germany | 0 | - | 4.31 | 22,504 |
| UK Cities Map Quiz | 0 | - | 4.95 | 462,841 |
| Countries and Territories of the United Kingdom | 0 | - | 4.89 | 93,201 |
| Counties of England Map Quiz | 0 | - | 4.97 | 306,421 |
| Champions League Winners | 0 | - | 4.92 | 998,892 |
| Biggest Countries in Europe in 1700 | 0 | - | 4.73 | 58,235 |
| Biggest Cities in Germany in 1910 | 0 | - | 4.41 | 23,411 |
| Sweden Immigration by Country | 0 | - | 4.55 | 55,774 |
| Languages of the United Kingdom | 0 | - | 4.13 | 40,775 |
| United Kingdom A-Z | 0 | - | 4.53 | 87,360 |
| 10 Closest Megacities to London | 0 | - | 4.90 | 17,584 |
| Top 10 Non-English Languages Spoken in New York City | 0 | - | 4.84 | 65,799 |
| Category Elimination - European Geography #1 | 0 | - | 4.98 | 231,200 |
| European Map without 10 Random Countries | 0 | - | 4.97 | 274,752 |
| Category Elimination - European Geography #2 | 0 | - | 4.99 | 165,668 |
| France Cities Map Quiz | 0 | - | 4.96 | 165,481 |
| Word Chain - France | 0 | - | 4.38 | 42,634 |
| Germany Country Quiz | 0 | - | 4.82 | 156,900 |
| Germany Cities Map Quiz | 0 | - | 4.87 | 125,405 |
| Ancient Greek Trivia | 0 | - | 4.62 | 66,829 |
| Geography of Ancient Greece | 0 | - | 4.69 | 31,808 |
| Italy Country Quiz | 0 | - | 4.82 | 122,487 |
| Regions of Italy Map Quiz | 0 | - | 4.96 | 148,647 |
| Italy Cities Map Quiz | 0 | - | 4.97 | 151,319 |
| Italian Foods | 0 | - | 4.31 | 72,336 |
| The Mafia Quiz | 0 | - | 4.46 | 23,224 |
| History of The Netherlands | 0 | - | 4.46 | 17,348 |
| Spain Cities Map Quiz | 0 | - | 4.87 | 96,276 |
| Regions of Spain Map Quiz | 0 | - | 4.95 | 184,871 |
| Canary Islands | 0 | - | 4.61 | 17,426 |
| Biggest Spanish Empire Countries | 0 | - | 4.91 | 115,248 |
| Switzerland Immigration by Country | 0 | - | 4.70 | 29,291 |
| British Spellings | 0 | - | 4.07 | 99,322 |
| British Groups of Things | 0 | - | 4.25 | 82,736 |
| British Acronyms | 0 | - | 4.39 | 45,668 |
| UK Immigration by Country | 0 | - | 4.94 | 139,944 |
| United Kingdom Decoder | 0 | - | 4.29 | 39,979 |
| United Kingdom Country Quiz | 0 | - | 4.96 | 138,585 |
| Modern-Day Countries of the British Empire in 1921 | 0 | - | 4.99 | 116,609 |
| Geography of Scotland | 0 | - | 4.63 | 21,517 |
| All UEFA Champions League Teams Ever | 0 | - | 4.85 | 128,911 |
| Countries with the Most Arabic Speakers | 0 | - | 4.92 | 79,628 |
| Pre-Euro Currencies | 0 | - | 4.44 | 52,486 |
| European Countries with the Fewest Overnight Visitors | 0 | - | 4.78 | 41,614 |
| Word Scramble - European Countries | 0 | - | 4.70 | 141,145 |
| Top 20 Football Clubs in Europe | 0 | - | 4.48 | 113,536 |
| 100 Longest Rivers in Europe - with a Map | 0 | - | 4.94 | 65,011 |
| Slavic Languages | 0 | - | 4.68 | 54,086 |
| Countries With the Most Russian Speakers | 0 | - | 4.97 | 99,112 |
| French Geography Quiz #1 | 0 | - | 4.89 | 34,577 |
| Andorra Country Quiz | 0 | - | 4.90 | 31,480 |
| Famous Swiss and Austrian People | 0 | - | 4.45 | 14,575 |
| Famous Dutch and Belgian People | 0 | - | 4.56 | 17,985 |
| France A-Z | 0 | - | 4.16 | 38,095 |
| Geography of Germany | 0 | - | 4.35 | 17,118 |
| Capitals of Italian Regions | 0 | - | 4.62 | 36,489 |
| Spanish Immigration by Country | 0 | - | 4.63 | 55,298 |
| Most Common First Names in Spain | 0 | - | 4.27 | 45,508 |
| Languages of Spain | 0 | - | 4.36 | 23,198 |
| Switzerland A-Z | 0 | - | 4.45 | 25,545 |
| Most Common Surnames in the UK | 0 | - | 4.21 | 69,514 |
| Fictional Characters from Great Britain | 0 | - | 4.24 | 41,949 |
| Wonderwall Lyrics | 0 | - | 4.25 | 73,526 |
| Malta Country Quiz | 0 | - | 4.81 | 30,888 |
| African Countries by First 2 Letters | 0 | - | 4.96 | 266,918 |
| History of Russia Quiz | 0 | - | 4.49 | 31,823 |
| Russia Multiple Choice | 0 | - | 4.58 | 40,612 |
| Famous French People | 0 | - | 4.12 | 28,085 |
| Movies Set in France | 0 | - | 4.26 | 13,090 |
| French Inventions | 0 | - | 4.08 | 13,871 |
| Country Quiz on a Map - France | 0 | - | 4.98 | 46,738 |
| History of Paris | 0 | - | 4.24 | 13,625 |
| The Trojan War | 0 | - | 4.83 | 39,506 |
| Greek Mythology General Knowledge #1 | 0 | - | 4.85 | 110,923 |
| 101 Figures from Greek Mythology | 0 | - | 4.99 | 124,790 |
| History of Italy | 0 | - | 4.55 | 31,867 |
| Word Chain - Italy | 0 | - | 4.07 | 23,120 |
| Italy Multiple Choice | 0 | - | 4.74 | 103,337 |
| Embarrassing Chapters in Italian History | 0 | - | 4.24 | 12,057 |
| Ancient Roman Trivia #1 | 0 | - | 4.85 | 84,183 |
| Roman Emperors | 0 | - | 4.95 | 118,852 |
| Geography of the Dutch Empire | 0 | - | 4.61 | 34,524 |
| Famous Nordic People | 0 | - | 4.34 | 19,931 |
| Famous Spaniards Quiz | 0 | - | 4.24 | 11,557 |
| Countries of the Spanish Empire | 0 | - | 4.52 | 77,045 |
| Word Chain - United Kingdom | 0 | - | 4.05 | 29,263 |
| The British Royal Family - Modern Times | 0 | - | 4.16 | 21,485 |
| People on Money - England | 0 | - | 4.29 | 16,578 |
| Name a Valid English City | 0 | - | 4.19 | 16,656 |
| English Monarchs in Order by First Letter | 0 | - | 4.38 | 31,444 |
| Asian Countries by First 2 Letters | 0 | - | 4.91 | 277,848 |
| European Geography By Letter - A | 0 | - | 4.61 | 132,590 |
| European Geography By Letter - B #1 | 0 | - | 4.67 | 111,055 |
| European Geography By Letter - C | 0 | - | 4.46 | 112,021 |
| European Geography By Letter - D | 0 | - | 4.50 | 106,900 |
| European Geography By Letter - L | 0 | - | 4.52 | 112,371 |
| European Geography By Letter - M | 0 | - | 4.64 | 129,166 |
| European Geography By Letter - N | 0 | - | 4.44 | 99,968 |
| European Geography By Letter - R | 0 | - | 4.42 | 92,743 |
| European Geography By Letter - V | 0 | - | 4.43 | 92,116 |
| European Geography By Letter - T | 0 | - | 4.41 | 81,483 |
| Europe Map Quiz | 0 | - | 5.00 | 4,739,888 |
| Europe Geography Quiz #1 | 0 | - | 4.54 | 71,063 |
| Europe Geography Quiz #2 | 0 | - | 4.57 | 71,704 |
| Europe Geography Quiz #4 | 0 | - | 4.57 | 70,018 |
| Europe Geography Quiz #5 | 0 | - | 4.54 | 61,058 |
| European Geography By Letter - S #1 | 0 | - | 4.63 | 99,720 |
| Top 10 European Countries by English Proficiency | 0 | - | 4.74 | 65,471 |
| Four Letter European Geography #1 | 0 | - | 4.44 | 27,392 |
| Four Letter European Geography #2 | 0 | - | 4.57 | 19,811 |
| Capitals of French Regions | 0 | - | 4.45 | 16,009 |
| Kings of France Quiz | 0 | - | 4.20 | 32,599 |
| German Loan Words | 0 | - | 4.27 | 135,537 |
| Olympian Gods Quiz | 0 | - | 4.96 | 497,555 |
| Ancient Greek Words | 0 | - | 4.93 | 110,949 |
| British to American Food Translation | 0 | - | 3.38 | 51,890 |
| Things British People Know that Americans Don't | 0 | - | 4.25 | 51,326 |
| Name Every Beatles Song | 0 | - | 4.97 | 234,648 |
| Bohemian Rhapsody Lyrics | 0 | - | 4.98 | 290,703 |
| Famous Scottish People | 0 | - | 4.22 | 18,344 |
| Africa Map Quiz | 0 | - | 5.00 | 2,107,845 |
| Oceania Map Quiz | 0 | - | 4.98 | 637,127 |
| Australian Capitals | 0 | - | 4.92 | 62,618 |
| European Physical Geography | 0 | - | 4.26 | 33,406 |
| Geography of Russia | 0 | - | 4.57 | 21,455 |
| Slovakia... or Slovenia? | 0 | - | 4.69 | 41,821 |
| History of Austria | 0 | - | 4.70 | 17,780 |
| Austria Country Quiz | 0 | - | 4.57 | 59,457 |
| Belgium Country Quiz | 0 | - | 4.70 | 71,388 |
| France Country Quiz | 0 | - | 4.70 | 134,115 |
| Biggest French Empire Countries | 0 | - | 4.49 | 64,990 |
| Geography of the French Empire | 0 | - | 4.45 | 26,970 |
| The French Revolution | 0 | - | 4.46 | 23,835 |
| France Multiple Choice | 0 | - | 4.38 | 40,664 |
| Tour de France Winners | 0 | - | 4.27 | 15,262 |
| History of France | 0 | - | 4.59 | 56,416 |
| Bundesliga Champions | 0 | - | 4.24 | 55,901 |
| All Bundesliga Teams Ever | 0 | - | 4.35 | 45,199 |
| German History A-Z | 0 | - | 4.49 | 24,482 |
| German Inventions | 0 | - | 3.91 | 30,195 |
| Embarrassing Chapters in German History | 0 | - | 3.41 | 12,587 |
| Greece Country Quiz | 0 | - | 4.74 | 65,884 |
| Roman Numeral Decoding Quiz | 0 | - | 4.94 | 434,537 |
| Two Letter Roman Numerals | 0 | - | 4.97 | 55,737 |
| Luxembourg Country Quiz | 0 | - | 4.77 | 33,561 |
| Monaco Country Quiz | 0 | - | 4.47 | 41,313 |
