| Regions of Spain Quiz | 0 | - | 4.91 | 115,681 |
| European Countries by First 2 Letters | 0 | - | 4.95 | 533,265 |
| Save Europeans by Guessing Countries | 0 | - | 4.86 | 217,630 |
| States of Germany | 0 | - | 4.95 | 155,059 |
| Germany Immigration by Country | 0 | - | 4.86 | 81,859 |
| Regions of Italy | 0 | - | 4.92 | 77,322 |
| Netherlands Immigration by Country | 0 | - | 4.93 | 52,970 |
| Cantons of Switzerland | 0 | - | 4.98 | 51,963 |
| Departments of France | 0 | - | 4.93 | 55,479 |
| Countries Surrounding Rome | 0 | - | 4.97 | 49,796 |
| England or Wales? | 0 | - | 4.94 | 46,094 |
| Count to 10 in Europe: Pro | 0 | - | 4.86 | 69,888 |
| Official European Union Languages | 0 | - | 4.97 | 240,469 |
| European Countries in their Native Language | 0 | - | 4.99 | 158,890 |
| Europe by Borders in 30 Seconds | 0 | - | 4.98 | 431,571 |
| Letters of the Greek Alphabet | 0 | - | 4.97 | 653,372 |
| Name that Greek Letter | 0 | - | 4.93 | 325,406 |
| Spanish Immigration by Country | 0 | - | 4.63 | 55,671 |
| Europe Geography Decoder | 0 | - | 4.87 | 70,414 |
| Canary Islands | 0 | - | 4.62 | 17,551 |
| Countries that Beat Switzerland | 0 | - | 4.88 | 42,121 |
| Top European Languages on a Map | 0 | - | 4.77 | 133,058 |
| Countries of the Spanish Empire | 0 | - | 4.52 | 77,482 |
| Celtic Nations | 0 | - | 4.61 | 47,131 |
| Top 10 Languages Spoken in Europe | 0 | - | 4.96 | 221,447 |
| Most Guessed Cities in Europe - Not Capitals | 0 | - | 4.83 | 88,173 |
| Countries of Europe with an Empty Map | 0 | - | 5.00 | 313,345 |
| All First-Level Subdivisions of Europe on a Map | 0 | - | 4.99 | 176,774 |
| Regions of France | 0 | - | 4.70 | 122,515 |
| France Immigration by Country | 0 | - | 4.70 | 77,043 |
| Famous Germans | 0 | - | 4.50 | 55,899 |
| German Groups of Things | 0 | - | 4.47 | 38,684 |
| Germany Multiple Choice | 0 | - | 4.84 | 54,775 |
| Germany True or False? | 0 | - | 4.61 | 49,090 |
| States of the German Confederation in 1848 | 0 | - | 4.90 | 32,534 |
| Largest Islands of Greece | 0 | - | 4.59 | 48,616 |
| Famous Italians by Clue | 0 | - | 4.45 | 90,586 |
| Provinces of the Netherlands | 0 | - | 4.80 | 41,979 |
| Most Common First Names in Spain | 0 | - | 4.33 | 55,410 |
| Languages of Spain | 0 | - | 4.36 | 23,475 |
| 100 Greatest Britons Quiz | 0 | - | 4.41 | 48,519 |
| Counties of England | 0 | - | 4.97 | 804,751 |
| Foods in a Full English Breakfast | 0 | - | 4.46 | 103,999 |
| The UK for Americans - True or False | 0 | - | 4.43 | 58,863 |
| "Big Five" European Soccer Champions Since 2000 | 0 | - | 4.97 | 363,062 |
| Top Asian Languages on a Map | 0 | - | 4.95 | 72,282 |
| Top African Languages on a Map | 0 | - | 4.94 | 75,591 |
| Add A Letter - Make a European City | 0 | - | 4.88 | 23,543 |
| Capital Cities with Spanish Names | 0 | - | 4.90 | 78,297 |
| European Geography By Letter - P #1 | 0 | - | 4.81 | 99,269 |
| Catholic Countries in Europe | 0 | - | 4.83 | 95,936 |
| European Geography By Letter - B #2 | 0 | - | 4.87 | 89,322 |
| Category Elimination - European Geography #3 | 0 | - | 4.86 | 82,236 |
| Federal Subjects of Russia | 0 | - | 4.95 | 150,037 |
| Regions of France Map Quiz | 0 | - | 4.97 | 145,874 |
| States of Germany Map Quiz | 0 | - | 4.92 | 134,056 |
| Famous Spaniards Quiz | 0 | - | 4.24 | 11,652 |
| UK Cities Map Quiz | 0 | - | 4.96 | 466,967 |
| Countries and Territories of the United Kingdom | 0 | - | 4.90 | 94,694 |
| Counties of England Map Quiz | 0 | - | 4.97 | 309,368 |
| Champions League Winners | 0 | - | 4.92 | 1,018,650 |
| Biggest Countries in Europe in 1700 | 0 | - | 4.74 | 58,843 |
| Sweden Immigration by Country | 0 | - | 4.53 | 56,454 |
| Languages of the United Kingdom | 0 | - | 4.14 | 41,101 |
| United Kingdom A-Z | 0 | - | 4.51 | 88,502 |
| 10 Closest Megacities to London | 0 | - | 4.90 | 17,879 |
| Top 10 Non-English Languages Spoken in New York City | 0 | - | 4.85 | 66,858 |
| Category Elimination - European Geography #1 | 0 | - | 4.98 | 236,501 |
| European Map without 10 Random Countries | 0 | - | 4.97 | 279,470 |
| Category Elimination - European Geography #2 | 0 | - | 4.99 | 169,399 |
| Andorra Country Quiz | 0 | - | 4.91 | 32,024 |
| Famous French People | 0 | - | 4.05 | 36,196 |
| France Cities Map Quiz | 0 | - | 4.96 | 168,092 |
| Word Chain - France | 0 | - | 4.38 | 42,976 |
| Germany Country Quiz | 0 | - | 4.82 | 159,160 |
| Germany Cities Map Quiz | 0 | - | 4.87 | 127,313 |
| Ancient Greek Trivia | 0 | - | 4.62 | 67,303 |
| Geography of Ancient Greece | 0 | - | 4.69 | 32,081 |
| Regions of Italy Map Quiz | 0 | - | 4.96 | 150,496 |
| Italy Cities Map Quiz | 0 | - | 4.97 | 153,293 |
| Italian Foods | 0 | - | 4.30 | 73,428 |
| The Mafia Quiz | 0 | - | 4.46 | 23,455 |
| History of The Netherlands | 0 | - | 4.46 | 17,580 |
| Kings of Spain Quiz | 0 | - | 4.14 | 14,139 |
| Spain Cities Map Quiz | 0 | - | 4.87 | 97,656 |
| Regions of Spain Map Quiz | 0 | - | 4.95 | 187,094 |
| Biggest Spanish Empire Countries | 0 | - | 4.91 | 117,181 |
| Switzerland Immigration by Country | 0 | - | 4.69 | 30,190 |
| British Spellings | 0 | - | 4.06 | 99,642 |
| British Groups of Things | 0 | - | 4.26 | 83,050 |
| British Acronyms | 0 | - | 4.40 | 45,994 |
| UK Immigration by Country | 0 | - | 4.94 | 141,952 |
| United Kingdom Decoder | 0 | - | 4.29 | 40,136 |
| United Kingdom Country Quiz | 0 | - | 4.96 | 141,381 |
| Modern-Day Countries of the British Empire in 1921 | 0 | - | 4.99 | 119,133 |
| English Monarchs in Order by First Letter | 0 | - | 4.38 | 32,242 |
| Geography of Scotland | 0 | - | 4.63 | 21,841 |
| All UEFA Champions League Teams Ever | 0 | - | 4.85 | 132,608 |
| Countries with the Most Arabic Speakers | 0 | - | 4.92 | 80,970 |
| Pre-Euro Currencies | 0 | - | 4.44 | 52,814 |
| European Countries with the Fewest Overnight Visitors | 0 | - | 4.80 | 41,742 |
| Word Scramble - European Countries | 0 | - | 4.72 | 142,490 |
| Top 20 Football Clubs in Europe | 0 | - | 4.48 | 124,649 |
| 100 Longest Rivers in Europe - with a Map | 0 | - | 4.94 | 66,092 |
| Slavic Languages | 0 | - | 4.67 | 54,805 |
| Countries With the Most Russian Speakers | 0 | - | 4.97 | 103,467 |
| French Geography Quiz #1 | 0 | - | 4.89 | 35,322 |
| Famous Swiss and Austrian People | 0 | - | 4.45 | 14,690 |
| Famous Dutch and Belgian People | 0 | - | 4.56 | 18,170 |
| France A-Z | 0 | - | 4.16 | 38,371 |
| French History Multiple Choice | 0 | - | 4.55 | 33,285 |
| History of Germany | 0 | - | 4.39 | 53,010 |
| Capitals of Italian Regions | 0 | - | 4.62 | 36,765 |
| History of Spain | 0 | - | 4.23 | 21,179 |
| Switzerland A-Z | 0 | - | 4.45 | 25,803 |
| Most Common Surnames in the UK | 0 | - | 4.22 | 70,050 |
| Fictional Characters from Great Britain | 0 | - | 4.24 | 42,117 |
| Wonderwall Lyrics | 0 | - | 4.25 | 74,173 |
| Malta Country Quiz | 0 | - | 4.81 | 31,277 |
| History of Russia Quiz | 0 | - | 4.47 | 32,032 |
| Russia Multiple Choice | 0 | - | 4.58 | 40,912 |
| Movies Set in France | 0 | - | 4.26 | 13,164 |
| French Inventions | 0 | - | 4.10 | 13,933 |
| Country Quiz on a Map - France | 0 | - | 4.98 | 47,849 |
| History of Paris | 0 | - | 4.24 | 13,687 |
| Word Chain - Germany | 0 | - | 4.31 | 22,704 |
| Country Quiz on a Map - Germany | 0 | - | 4.95 | 35,696 |
| The Trojan War | 0 | - | 4.83 | 40,124 |
| Greek Mythology General Knowledge #1 | 0 | - | 4.85 | 113,360 |
| 101 Figures from Greek Mythology | 0 | - | 4.99 | 128,117 |
| History of Italy | 0 | - | 4.55 | 32,199 |
| Word Chain - Italy | 0 | - | 4.07 | 23,235 |
| Italy Multiple Choice | 0 | - | 4.74 | 104,570 |
| Embarrassing Chapters in Italian History | 0 | - | 4.24 | 12,186 |
| Ancient Roman Trivia #1 | 0 | - | 4.85 | 85,732 |
| Roman Emperors | 0 | - | 4.95 | 121,524 |
| Geography of the Dutch Empire | 0 | - | 4.62 | 34,867 |
| Famous Nordic People | 0 | - | 4.34 | 20,361 |
| Geography of Spain | 0 | - | 4.59 | 22,302 |
| Word Chain - United Kingdom | 0 | - | 4.05 | 29,428 |
| The British Royal Family - Modern Times | 0 | - | 4.16 | 21,585 |
| People on Money - England | 0 | - | 4.30 | 21,256 |
| Name a Valid English City | 0 | - | 4.19 | 16,848 |
| Asian Countries by First 2 Letters | 0 | - | 4.91 | 281,135 |
| African Countries by First 2 Letters | 0 | - | 4.96 | 269,760 |
| European Geography By Letter - A | 0 | - | 4.52 | 148,541 |
| European Geography By Letter - B #1 | 0 | - | 4.62 | 121,987 |
| European Geography By Letter - C | 0 | - | 4.44 | 124,543 |
| European Geography By Letter - D | 0 | - | 4.49 | 119,103 |
| European Geography By Letter - L | 0 | - | 4.52 | 115,487 |
| European Geography By Letter - M | 0 | - | 4.70 | 133,019 |
| European Geography By Letter - N | 0 | - | 4.44 | 102,424 |
| European Geography By Letter - R | 0 | - | 4.43 | 94,999 |
| European Geography By Letter - V | 0 | - | 4.43 | 94,275 |
| European Geography By Letter - T | 0 | - | 4.41 | 83,911 |
| Europe Map Quiz | 0 | - | 5.00 | 4,795,285 |
| Europe Geography Quiz #1 | 0 | - | 4.54 | 71,591 |
| Europe Geography Quiz #2 | 0 | - | 4.57 | 72,263 |
| Europe Geography Quiz #4 | 0 | - | 4.57 | 70,533 |
| Europe Geography Quiz #5 | 0 | - | 4.55 | 61,489 |
| European Geography By Letter - S #1 | 0 | - | 4.63 | 101,658 |
| Top 10 European Countries by English Proficiency | 0 | - | 4.74 | 66,060 |
| Four Letter European Geography #1 | 0 | - | 4.41 | 28,641 |
| Four Letter European Geography #2 | 0 | - | 4.54 | 20,803 |
| Capitals of French Regions | 0 | - | 4.45 | 16,217 |
| Kings of France Quiz | 0 | - | 4.22 | 32,976 |
| Capitals of German States | 0 | - | 4.74 | 29,102 |
| Chancellors of Germany, 1949–present | 0 | - | 4.60 | 23,602 |
| Olympian Gods Quiz | 0 | - | 4.96 | 504,726 |
| Ancient Greek Words | 0 | - | 4.93 | 112,740 |
| British to American Food Translation | 0 | - | 3.38 | 52,066 |
| Things British People Know that Americans Don't | 0 | - | 4.25 | 51,616 |
| Name Every Beatles Song | 0 | - | 4.97 | 238,949 |
| Bohemian Rhapsody Lyrics | 0 | - | 4.98 | 293,056 |
| Famous Scottish People | 0 | - | 4.22 | 18,445 |
| Song Title Translation - Spanish | 0 | - | 4.57 | 35,921 |
| Oceania Map Quiz | 0 | - | 4.98 | 660,836 |
| Australian Capitals | 0 | - | 4.92 | 62,886 |
| European Physical Geography | 0 | - | 4.26 | 33,623 |
| Geography of Russia | 0 | - | 4.57 | 21,628 |
| Slovakia... or Slovenia? | 0 | - | 4.69 | 42,181 |
| History of Austria | 0 | - | 4.70 | 17,993 |
| Austria Country Quiz | 0 | - | 4.57 | 60,146 |
| Belgium Country Quiz | 0 | - | 4.72 | 72,412 |
| France Country Quiz | 0 | - | 4.70 | 135,862 |
| Biggest French Empire Countries | 0 | - | 4.49 | 65,420 |
| Geography of the French Empire | 0 | - | 4.45 | 27,242 |
| The French Revolution | 0 | - | 4.47 | 24,175 |
| France Multiple Choice | 0 | - | 4.39 | 40,881 |
| Tour de France Winners | 0 | - | 4.27 | 15,551 |
| History of France | 0 | - | 4.61 | 57,767 |
| Biggest Cities in Germany in 1910 | 0 | - | 4.41 | 23,581 |
| Greece Country Quiz | 0 | - | 4.74 | 66,748 |
| Italy Country Quiz | 0 | - | 4.77 | 124,277 |
| Roman Numeral Decoding Quiz | 0 | - | 4.94 | 440,678 |
| Two Letter Roman Numerals | 0 | - | 4.97 | 56,659 |
| Luxembourg Country Quiz | 0 | - | 4.78 | 34,003 |
| Monaco Country Quiz | 0 | - | 4.48 | 41,740 |
| Netherlands Country Quiz | 0 | - | 4.52 | 81,085 |
| Nordic Cities Map Quiz | 0 | - | 4.77 | 90,827 |
