| Netherlands Immigration by Country | 0 | - | 4.93 | 52,368 |
| European Countries by First 2 Letters | 0 | - | 4.95 | 530,304 |
| Save Europeans by Guessing Countries | 0 | - | 4.86 | 214,338 |
| States of Germany | 0 | - | 4.95 | 153,017 |
| Germany Immigration by Country | 0 | - | 4.85 | 81,225 |
| Regions of Italy | 0 | - | 4.92 | 76,165 |
| Regions of Spain Quiz | 0 | - | 4.90 | 114,261 |
| Cantons of Switzerland | 0 | - | 4.98 | 51,370 |
| Departments of France | 0 | - | 4.93 | 54,381 |
| Countries Surrounding Rome | 0 | - | 4.97 | 49,599 |
| England or Wales? | 0 | - | 4.94 | 45,772 |
| Count to 10 in Europe: Pro | 0 | - | 4.86 | 69,276 |
| Official European Union Languages | 0 | - | 4.97 | 238,821 |
| European Countries in their Native Language | 0 | - | 4.99 | 158,066 |
| Europe by Borders in 30 Seconds | 0 | - | 4.98 | 428,792 |
| Europe Geography Decoder | 0 | - | 4.86 | 70,079 |
| Countries that Beat Switzerland | 0 | - | 4.88 | 41,895 |
| Geography of the Dutch Empire | 0 | - | 4.62 | 34,712 |
| Add A Letter - Make a European City | 0 | - | 4.90 | 23,414 |
| Celtic Nations | 0 | - | 4.69 | 46,977 |
| Most Guessed Cities in Europe - Not Capitals | 0 | - | 4.82 | 87,496 |
| Countries of Europe with an Empty Map | 0 | - | 5.00 | 311,092 |
| All First-Level Subdivisions of Europe on a Map | 0 | - | 4.98 | 172,635 |
| Famous Dutch and Belgian People | 0 | - | 4.56 | 18,081 |
| Regions of France | 0 | - | 4.72 | 121,120 |
| France Immigration by Country | 0 | - | 4.70 | 76,646 |
| Famous Germans | 0 | - | 4.50 | 55,482 |
| German Groups of Things | 0 | - | 4.46 | 38,508 |
| Germany Multiple Choice | 0 | - | 4.84 | 54,436 |
| Germany True or False? | 0 | - | 4.61 | 48,863 |
| States of the German Confederation in 1848 | 0 | - | 4.89 | 32,151 |
| Largest Islands of Greece | 0 | - | 4.59 | 48,117 |
| Famous Italians by Clue | 0 | - | 4.45 | 89,707 |
| Provinces of the Netherlands | 0 | - | 4.80 | 41,467 |
| 100 Greatest Britons Quiz | 0 | - | 4.41 | 48,325 |
| Counties of England | 0 | - | 4.97 | 798,368 |
| Foods in a Full English Breakfast | 0 | - | 4.46 | 103,388 |
| The UK for Americans - True or False | 0 | - | 4.43 | 58,675 |
| "Big Five" European Soccer Champions Since 2000 | 0 | - | 4.97 | 357,695 |
| Catholic Countries in Europe | 0 | - | 4.83 | 95,323 |
| European Geography By Letter - B #2 | 0 | - | 4.84 | 81,290 |
| Category Elimination - European Geography #3 | 0 | - | 4.86 | 81,208 |
| Federal Subjects of Russia | 0 | - | 4.95 | 147,846 |
| Regions of France Map Quiz | 0 | - | 4.97 | 144,726 |
| States of Germany Map Quiz | 0 | - | 4.92 | 133,062 |
| UK Cities Map Quiz | 0 | - | 4.96 | 465,000 |
| Countries and Territories of the United Kingdom | 0 | - | 4.90 | 94,106 |
| Counties of England Map Quiz | 0 | - | 4.97 | 308,053 |
| Champions League Winners | 0 | - | 4.91 | 1,009,144 |
| Biggest Countries in Europe in 1700 | 0 | - | 4.73 | 58,553 |
| Luxembourg Country Quiz | 0 | - | 4.78 | 33,811 |
| Sweden Immigration by Country | 0 | - | 4.55 | 56,196 |
| United Kingdom A-Z | 0 | - | 4.52 | 88,122 |
| 10 Closest Megacities to London | 0 | - | 4.90 | 17,734 |
| Category Elimination - European Geography #1 | 0 | - | 4.98 | 233,759 |
| European Map without 10 Random Countries | 0 | - | 4.97 | 277,242 |
| Category Elimination - European Geography #2 | 0 | - | 4.99 | 167,493 |
| Andorra Country Quiz | 0 | - | 4.91 | 31,751 |
| Famous French People | 0 | - | 4.07 | 35,792 |
| France Cities Map Quiz | 0 | - | 4.96 | 167,051 |
| Word Chain - France | 0 | - | 4.38 | 42,824 |
| Germany Country Quiz | 0 | - | 4.83 | 158,104 |
| Germany Cities Map Quiz | 0 | - | 4.87 | 126,552 |
| Ancient Greek Trivia | 0 | - | 4.62 | 67,058 |
| Geography of Ancient Greece | 0 | - | 4.69 | 31,944 |
| Regions of Italy Map Quiz | 0 | - | 4.96 | 149,582 |
| Italy Cities Map Quiz | 0 | - | 4.97 | 152,254 |
| Italian Foods | 0 | - | 4.30 | 72,897 |
| The Mafia Quiz | 0 | - | 4.46 | 23,363 |
| History of The Netherlands | 0 | - | 4.46 | 17,469 |
| Spain Cities Map Quiz | 0 | - | 4.87 | 97,066 |
| Regions of Spain Map Quiz | 0 | - | 4.95 | 185,953 |
| Canary Islands | 0 | - | 4.62 | 17,489 |
| Biggest Spanish Empire Countries | 0 | - | 4.91 | 116,209 |
| Switzerland Immigration by Country | 0 | - | 4.69 | 29,800 |
| British Spellings | 0 | - | 4.06 | 99,493 |
| British Groups of Things | 0 | - | 4.25 | 82,900 |
| British Acronyms | 0 | - | 4.40 | 45,835 |
| UK Immigration by Country | 0 | - | 4.94 | 141,093 |
| United Kingdom Decoder | 0 | - | 4.29 | 40,051 |
| United Kingdom Country Quiz | 0 | - | 4.96 | 140,081 |
| Modern-Day Countries of the British Empire in 1921 | 0 | - | 4.99 | 117,908 |
| English Monarchs in Order by First Letter | 0 | - | 4.38 | 31,916 |
| Geography of Scotland | 0 | - | 4.63 | 21,645 |
| All UEFA Champions League Teams Ever | 0 | - | 4.85 | 130,869 |
| Pre-Euro Currencies | 0 | - | 4.44 | 52,631 |
| European Countries with the Fewest Overnight Visitors | 0 | - | 4.80 | 41,669 |
| Word Scramble - European Countries | 0 | - | 4.73 | 141,827 |
| Top 20 Football Clubs in Europe | 0 | - | 4.48 | 115,465 |
| 100 Longest Rivers in Europe - with a Map | 0 | - | 4.94 | 65,584 |
| Slavic Languages | 0 | - | 4.68 | 54,441 |
| French Geography Quiz #1 | 0 | - | 4.89 | 34,836 |
| Famous Swiss and Austrian People | 0 | - | 4.45 | 14,638 |
| France A-Z | 0 | - | 4.16 | 38,251 |
| French History Multiple Choice | 0 | - | 4.55 | 33,107 |
| History of Germany | 0 | - | 4.39 | 52,883 |
| Letters of the Greek Alphabet | 0 | - | 4.97 | 648,506 |
| Name that Greek Letter | 0 | - | 4.93 | 324,080 |
| Capitals of Italian Regions | 0 | - | 4.62 | 36,652 |
| Modern Day Countries of the Dutch Empire on a Map | 0 | - | 4.86 | 61,250 |
| Spanish Immigration by Country | 0 | - | 4.63 | 55,507 |
| Most Common First Names in Spain | 0 | - | 4.27 | 45,639 |
| Countries of Iberia in History with a Map | 0 | - | 4.87 | 42,021 |
| Modern Day Countries of the Spanish Empire on a Map | 0 | - | 4.95 | 86,443 |
| Switzerland A-Z | 0 | - | 4.45 | 25,677 |
| Most Common Surnames in the UK | 0 | - | 4.22 | 69,743 |
| Fictional Characters from Great Britain | 0 | - | 4.24 | 42,034 |
| Wonderwall Lyrics | 0 | - | 4.25 | 73,835 |
| Malta Country Quiz | 0 | - | 4.81 | 31,099 |
| African Countries by First 2 Letters | 0 | - | 4.96 | 268,508 |
| Top European Languages on a Map | 0 | - | 4.77 | 132,270 |
| History of Russia Quiz | 0 | - | 4.47 | 31,943 |
| Russia Multiple Choice | 0 | - | 4.58 | 40,767 |
| Movies Set in France | 0 | - | 4.26 | 13,128 |
| French Inventions | 0 | - | 4.10 | 13,905 |
| Country Quiz on a Map - France | 0 | - | 4.98 | 47,328 |
| History of Paris | 0 | - | 4.24 | 13,657 |
| Word Chain - Germany | 0 | - | 4.31 | 22,607 |
| Country Quiz on a Map - Germany | 0 | - | 4.95 | 35,158 |
| The Trojan War | 0 | - | 4.83 | 39,779 |
| Greek Mythology General Knowledge #1 | 0 | - | 4.85 | 112,108 |
| 101 Figures from Greek Mythology | 0 | - | 4.99 | 126,376 |
| History of Italy | 0 | - | 4.55 | 32,040 |
| Word Chain - Italy | 0 | - | 4.07 | 23,178 |
| Italy Multiple Choice | 0 | - | 4.74 | 103,910 |
| Embarrassing Chapters in Italian History | 0 | - | 4.24 | 12,121 |
| Ancient Roman Trivia #1 | 0 | - | 4.85 | 84,623 |
| Roman Emperors | 0 | - | 4.95 | 120,308 |
| Famous Nordic People | 0 | - | 4.34 | 20,158 |
| Famous Spaniards Quiz | 0 | - | 4.24 | 11,621 |
| Countries of the Spanish Empire | 0 | - | 4.52 | 77,286 |
| Word Chain - United Kingdom | 0 | - | 4.05 | 29,354 |
| The British Royal Family - Modern Times | 0 | - | 4.16 | 21,539 |
| People on Money - England | 0 | - | 4.29 | 16,622 |
| Name a Valid English City | 0 | - | 4.19 | 16,740 |
| Asian Countries by First 2 Letters | 0 | - | 4.91 | 279,534 |
| European Geography By Letter - A | 0 | - | 4.52 | 146,627 |
| European Geography By Letter - B #1 | 0 | - | 4.67 | 120,065 |
| European Geography By Letter - C | 0 | - | 4.46 | 114,344 |
| European Geography By Letter - D | 0 | - | 4.50 | 108,946 |
| European Geography By Letter - L | 0 | - | 4.52 | 113,743 |
| European Geography By Letter - M | 0 | - | 4.67 | 130,977 |
| European Geography By Letter - P #1 | 0 | - | 4.80 | 97,723 |
| European Geography By Letter - N | 0 | - | 4.44 | 101,022 |
| European Geography By Letter - R | 0 | - | 4.42 | 93,853 |
| European Geography By Letter - V | 0 | - | 4.42 | 93,144 |
| European Geography By Letter - T | 0 | - | 4.41 | 82,625 |
| Europe Map Quiz | 0 | - | 5.00 | 4,768,892 |
| Europe Geography Quiz #1 | 0 | - | 4.55 | 71,334 |
| Europe Geography Quiz #2 | 0 | - | 4.57 | 71,997 |
| Europe Geography Quiz #4 | 0 | - | 4.57 | 70,280 |
| Europe Geography Quiz #5 | 0 | - | 4.55 | 61,280 |
| European Geography By Letter - S #1 | 0 | - | 4.62 | 100,743 |
| Four Letter European Geography #2 | 0 | - | 4.57 | 20,527 |
| Capitals of French Regions | 0 | - | 4.45 | 16,096 |
| Kings of France Quiz | 0 | - | 4.20 | 32,800 |
| Capitals of German States | 0 | - | 4.74 | 28,979 |
| Chancellors of Germany, 1949–present | 0 | - | 4.60 | 23,382 |
| Olympian Gods Quiz | 0 | - | 4.96 | 501,627 |
| Ancient Greek Words | 0 | - | 4.93 | 111,832 |
| British to American Food Translation | 0 | - | 3.38 | 51,979 |
| Things British People Know that Americans Don't | 0 | - | 4.25 | 51,482 |
| Name Every Beatles Song | 0 | - | 4.97 | 236,795 |
| Bohemian Rhapsody Lyrics | 0 | - | 4.98 | 291,972 |
| Famous Scottish People | 0 | - | 4.22 | 18,409 |
| Africa Map Quiz | 0 | - | 5.00 | 2,120,840 |
| Oceania Map Quiz | 0 | - | 4.98 | 643,509 |
| Australian Capitals | 0 | - | 4.92 | 62,742 |
| European Physical Geography | 0 | - | 4.26 | 33,536 |
| Geography of Russia | 0 | - | 4.57 | 21,550 |
| Slovakia... or Slovenia? | 0 | - | 4.69 | 41,996 |
| History of Austria | 0 | - | 4.70 | 17,893 |
| Austria Country Quiz | 0 | - | 4.57 | 59,817 |
| Belgium Country Quiz | 0 | - | 4.72 | 71,905 |
| France Country Quiz | 0 | - | 4.70 | 135,126 |
| Biggest French Empire Countries | 0 | - | 4.49 | 65,213 |
| Geography of the French Empire | 0 | - | 4.45 | 27,149 |
| The French Revolution | 0 | - | 4.47 | 24,047 |
| France Multiple Choice | 0 | - | 4.39 | 40,762 |
| Tour de France Winners | 0 | - | 4.27 | 15,409 |
| History of France | 0 | - | 4.59 | 57,224 |
| Greece Country Quiz | 0 | - | 4.74 | 66,344 |
| Italy Country Quiz | 0 | - | 4.77 | 123,556 |
| Roman Numeral Decoding Quiz | 0 | - | 4.94 | 437,729 |
| Two Letter Roman Numerals | 0 | - | 4.97 | 56,238 |
| Monaco Country Quiz | 0 | - | 4.47 | 41,551 |
| Netherlands Country Quiz | 0 | - | 4.53 | 80,616 |
| Nordic Cities Map Quiz | 0 | - | 4.77 | 90,523 |
| The Vikings! | 0 | - | 4.46 | 28,366 |
| Portugal Country Quiz | 0 | - | 4.69 | 71,988 |
| The Portuguese Empire | 0 | - | 4.58 | 12,081 |
| Spain Country Quiz | 0 | - | 4.44 | 128,722 |
| Switzerland Country Quiz | 0 | - | 4.51 | 63,430 |
| American to British Word Translation | 0 | - | 4.14 | 139,249 |
| Languages of the United Kingdom | 0 | - | 4.13 | 40,936 |
| Largest Islands in the British Isles With a Map | 0 | - | 4.52 | 38,760 |
| Biggest British Empire Countries | 0 | - | 4.74 | 100,147 |
| Which Country of the United Kingdom? | 0 | - | 4.58 | 39,407 |
| British Geography Multiple Choice | 0 | - | 4.49 | 43,355 |
| Name the James Bond Movies | 0 | - | 4.56 | 158,682 |
