| Netherlands Immigration by Country | 0 | - | 4.93 | 52,990 |
| England or Wales? | 0 | - | 4.94 | 46,115 |
| European Countries by First 2 Letters | 0 | - | 4.95 | 533,326 |
| Save Europeans by Guessing Countries | 0 | - | 4.86 | 217,736 |
| States of Germany | 0 | - | 4.95 | 155,097 |
| Germany Immigration by Country | 0 | - | 4.86 | 81,880 |
| Regions of Italy | 0 | - | 4.92 | 77,371 |
| Regions of Spain Quiz | 0 | - | 4.91 | 115,718 |
| Cantons of Switzerland | 0 | - | 4.98 | 51,980 |
| Departments of France | 0 | - | 4.93 | 55,519 |
| Countries Surrounding Rome | 0 | - | 4.97 | 49,802 |
| Count to 10 in Europe: Pro | 0 | - | 4.86 | 69,905 |
| Official European Union Languages | 0 | - | 4.97 | 240,501 |
| European Countries in their Native Language | 0 | - | 4.99 | 158,906 |
| Europe by Borders in 30 Seconds | 0 | - | 4.98 | 431,665 |
| Europe Geography Decoder | 0 | - | 4.87 | 70,419 |
| Countries that Beat Switzerland | 0 | - | 4.88 | 42,129 |
| Russia Multiple Choice | 0 | - | 4.58 | 40,919 |
| French History Multiple Choice | 0 | - | 4.55 | 33,290 |
| Geography of the Dutch Empire | 0 | - | 4.62 | 34,869 |
| Celtic Nations | 0 | - | 4.61 | 47,134 |
| Most Guessed Cities in Europe - Not Capitals | 0 | - | 4.83 | 88,189 |
| Countries of Europe with an Empty Map | 0 | - | 5.00 | 313,388 |
| All First-Level Subdivisions of Europe on a Map | 0 | - | 4.99 | 176,882 |
| Famous Dutch and Belgian People | 0 | - | 4.56 | 18,173 |
| Regions of France | 0 | - | 4.70 | 122,556 |
| France Immigration by Country | 0 | - | 4.70 | 77,052 |
| Famous Germans | 0 | - | 4.50 | 55,912 |
| German Groups of Things | 0 | - | 4.47 | 38,686 |
| Germany Multiple Choice | 0 | - | 4.84 | 54,782 |
| Germany True or False? | 0 | - | 4.61 | 49,096 |
| States of the German Confederation in 1848 | 0 | - | 4.90 | 32,546 |
| Largest Islands of Greece | 0 | - | 4.59 | 48,630 |
| Famous Italians by Clue | 0 | - | 4.45 | 90,605 |
| Provinces of the Netherlands | 0 | - | 4.80 | 41,990 |
| 100 Greatest Britons Quiz | 0 | - | 4.41 | 48,525 |
| Counties of England | 0 | - | 4.97 | 804,940 |
| Foods in a Full English Breakfast | 0 | - | 4.46 | 104,012 |
| The UK for Americans - True or False | 0 | - | 4.43 | 58,869 |
| "Big Five" European Soccer Champions Since 2000 | 0 | - | 4.97 | 363,216 |
| Add A Letter - Make a European City | 0 | - | 4.88 | 23,548 |
| Australia... or New Zealand? | 0 | - | 4.83 | 62,164 |
| European Geography By Letter - P #1 | 0 | - | 4.81 | 99,326 |
| Catholic Countries in Europe | 0 | - | 4.83 | 95,955 |
| European Geography By Letter - B #2 | 0 | - | 4.87 | 89,436 |
| Category Elimination - European Geography #3 | 0 | - | 4.86 | 82,271 |
| Federal Subjects of Russia | 0 | - | 4.95 | 150,098 |
| Regions of France Map Quiz | 0 | - | 4.97 | 145,903 |
| States of Germany Map Quiz | 0 | - | 4.92 | 134,102 |
| UK Cities Map Quiz | 0 | - | 4.96 | 467,015 |
| Countries and Territories of the United Kingdom | 0 | - | 4.90 | 94,714 |
| Counties of England Map Quiz | 0 | - | 4.97 | 309,401 |
| Champions League Winners | 0 | - | 4.92 | 1,018,991 |
| Biggest Countries in Europe in 1700 | 0 | - | 4.74 | 58,854 |
| Slovakia... or Slovenia? | 0 | - | 4.69 | 42,185 |
| Sweden Immigration by Country | 0 | - | 4.53 | 56,464 |
| United Kingdom A-Z | 0 | - | 4.51 | 88,513 |
| Which Country of the United Kingdom? | 0 | - | 4.58 | 39,671 |
| British Geography Multiple Choice | 0 | - | 4.49 | 43,514 |
| 10 Closest Megacities to London | 0 | - | 4.90 | 17,881 |
| Category Elimination - European Geography #1 | 0 | - | 4.98 | 236,585 |
| European Map without 10 Random Countries | 0 | - | 4.97 | 279,512 |
| Category Elimination - European Geography #2 | 0 | - | 4.99 | 169,449 |
| Andorra Country Quiz | 0 | - | 4.91 | 32,042 |
| Austria... or Australia? | 0 | - | 4.67 | 104,889 |
| Famous French People | 0 | - | 4.05 | 36,210 |
| France Cities Map Quiz | 0 | - | 4.96 | 168,291 |
| Word Chain - France | 0 | - | 4.38 | 42,979 |
| Germany Country Quiz | 0 | - | 4.82 | 159,206 |
| Germany Cities Map Quiz | 0 | - | 4.87 | 127,341 |
| Ancient Greek Trivia | 0 | - | 4.62 | 67,310 |
| Geography of Ancient Greece | 0 | - | 4.69 | 32,083 |
| Regions of Italy Map Quiz | 0 | - | 4.96 | 150,528 |
| Italy Cities Map Quiz | 0 | - | 4.97 | 153,321 |
| Italian Foods | 0 | - | 4.30 | 73,446 |
| The Mafia Quiz | 0 | - | 4.46 | 23,459 |
| History of The Netherlands | 0 | - | 4.46 | 17,583 |
| Spain Cities Map Quiz | 0 | - | 4.87 | 97,672 |
| Regions of Spain Map Quiz | 0 | - | 4.95 | 187,117 |
| Canary Islands | 0 | - | 4.62 | 17,553 |
| Biggest Spanish Empire Countries | 0 | - | 4.91 | 117,211 |
| Switzerland Immigration by Country | 0 | - | 4.69 | 30,196 |
| British Spellings | 0 | - | 4.06 | 99,650 |
| British Groups of Things | 0 | - | 4.26 | 83,058 |
| British Acronyms | 0 | - | 4.40 | 46,004 |
| UK Immigration by Country | 0 | - | 4.94 | 141,977 |
| United Kingdom Decoder | 0 | - | 4.29 | 40,137 |
| United Kingdom Country Quiz | 0 | - | 4.96 | 141,421 |
| Modern-Day Countries of the British Empire in 1921 | 0 | - | 4.99 | 119,172 |
| English Monarchs in Order by First Letter | 0 | - | 4.38 | 32,242 |
| Geography of Scotland | 0 | - | 4.63 | 21,842 |
| All UEFA Champions League Teams Ever | 0 | - | 4.85 | 132,651 |
| Pre-Euro Currencies | 0 | - | 4.44 | 52,821 |
| European Countries with the Fewest Overnight Visitors | 0 | - | 4.80 | 41,745 |
| Word Scramble - European Countries | 0 | - | 4.72 | 142,524 |
| Top 20 Football Clubs in Europe | 0 | - | 4.48 | 124,879 |
| 100 Longest Rivers in Europe - with a Map | 0 | - | 4.94 | 66,102 |
| Slavic Languages | 0 | - | 4.67 | 54,819 |
| French Geography Quiz #1 | 0 | - | 4.89 | 35,333 |
| Famous Swiss and Austrian People | 0 | - | 4.45 | 14,690 |
| France A-Z | 0 | - | 4.16 | 38,374 |
| History of Germany | 0 | - | 4.39 | 53,013 |
| Letters of the Greek Alphabet | 0 | - | 4.97 | 653,528 |
| Name that Greek Letter | 0 | - | 4.93 | 325,467 |
| Capitals of Italian Regions | 0 | - | 4.62 | 36,765 |
| Modern Day Countries of the Dutch Empire on a Map | 0 | - | 4.87 | 61,879 |
| Spanish Immigration by Country | 0 | - | 4.63 | 55,674 |
| Most Common First Names in Spain | 0 | - | 4.33 | 55,422 |
| Countries of Iberia in History with a Map | 0 | - | 4.88 | 42,584 |
| Modern Day Countries of the Spanish Empire on a Map | 0 | - | 4.95 | 87,100 |
| Switzerland A-Z | 0 | - | 4.45 | 25,806 |
| Most Common Surnames in the UK | 0 | - | 4.22 | 70,056 |
| Fictional Characters from Great Britain | 0 | - | 4.24 | 42,118 |
| UK General Knowledge Multiple Choice #1 | 0 | - | 4.24 | 20,927 |
| Wonderwall Lyrics | 0 | - | 4.25 | 74,181 |
| British History Multiple Choice #1 | 0 | - | 4.46 | 55,371 |
| British History Multiple Choice #2 | 0 | - | 4.42 | 38,117 |
| Malta Country Quiz | 0 | - | 4.81 | 31,279 |
| Canada Multiple Choice Quiz | 0 | - | 4.50 | 49,782 |
| Top European Languages on a Map | 0 | - | 4.77 | 133,072 |
| History of Russia Quiz | 0 | - | 4.47 | 32,033 |
| Movies Set in France | 0 | - | 4.26 | 13,166 |
| French Inventions | 0 | - | 4.10 | 13,933 |
| Country Quiz on a Map - France | 0 | - | 4.98 | 47,862 |
| History of Paris | 0 | - | 4.24 | 13,687 |
| Word Chain - Germany | 0 | - | 4.31 | 22,705 |
| Country Quiz on a Map - Germany | 0 | - | 4.95 | 35,711 |
| The Trojan War | 0 | - | 4.83 | 40,136 |
| Greek Mythology General Knowledge #1 | 0 | - | 4.85 | 113,400 |
| 101 Figures from Greek Mythology | 0 | - | 4.99 | 128,181 |
| History of Italy | 0 | - | 4.55 | 32,204 |
| Word Chain - Italy | 0 | - | 4.07 | 23,238 |
| Italy Multiple Choice | 0 | - | 4.74 | 104,599 |
| Embarrassing Chapters in Italian History | 0 | - | 4.24 | 12,191 |
| Ancient Roman Trivia #1 | 0 | - | 4.85 | 85,748 |
| Roman Emperors | 0 | - | 4.95 | 121,562 |
| Famous Nordic People | 0 | - | 4.34 | 20,365 |
| Famous Spaniards Quiz | 0 | - | 4.24 | 11,652 |
| Countries of the Spanish Empire | 0 | - | 4.52 | 77,490 |
| Word Chain - United Kingdom | 0 | - | 4.05 | 29,428 |
| The British Royal Family - Modern Times | 0 | - | 4.16 | 21,590 |
| People on Money - England | 0 | - | 4.30 | 21,466 |
| Name a Valid English City | 0 | - | 4.19 | 16,852 |
| Asian Countries by First 2 Letters | 0 | - | 4.91 | 281,179 |
| African Countries by First 2 Letters | 0 | - | 4.96 | 269,796 |
| European Geography By Letter - A | 0 | - | 4.52 | 148,635 |
| European Geography By Letter - B #1 | 0 | - | 4.62 | 122,081 |
| European Geography By Letter - C | 0 | - | 4.44 | 124,661 |
| European Geography By Letter - D | 0 | - | 4.49 | 119,224 |
| European Geography By Letter - L | 0 | - | 4.52 | 115,577 |
| European Geography By Letter - M | 0 | - | 4.70 | 133,109 |
| European Geography By Letter - N | 0 | - | 4.44 | 102,480 |
| European Geography By Letter - R | 0 | - | 4.43 | 95,053 |
| European Geography By Letter - V | 0 | - | 4.43 | 94,311 |
| European Geography By Letter - T | 0 | - | 4.41 | 83,963 |
| Europe Map Quiz | 0 | - | 5.00 | 4,796,099 |
| Europe Geography Quiz #1 | 0 | - | 4.54 | 71,599 |
| Europe Geography Quiz #2 | 0 | - | 4.57 | 72,274 |
| Europe Geography Quiz #4 | 0 | - | 4.57 | 70,544 |
| Europe Geography Quiz #5 | 0 | - | 4.55 | 61,494 |
| European Geography By Letter - S #1 | 0 | - | 4.63 | 101,694 |
| Four Letter European Geography #1 | 0 | - | 4.41 | 28,654 |
| Four Letter European Geography #2 | 0 | - | 4.54 | 20,812 |
| Capitals of French Regions | 0 | - | 4.45 | 16,218 |
| Kings of France Quiz | 0 | - | 4.22 | 32,979 |
| Capitals of German States | 0 | - | 4.74 | 29,104 |
| Chancellors of Germany, 1949–present | 0 | - | 4.60 | 23,607 |
| Olympian Gods Quiz | 0 | - | 4.96 | 504,828 |
| Ancient Greek Words | 0 | - | 4.93 | 112,760 |
| British to American Food Translation | 0 | - | 3.38 | 52,068 |
| Things British People Know that Americans Don't | 0 | - | 4.25 | 51,622 |
| Name Every Beatles Song | 0 | - | 4.97 | 239,016 |
| Bohemian Rhapsody Lyrics | 0 | - | 4.98 | 293,087 |
| Famous Scottish People | 0 | - | 4.22 | 18,447 |
| Oceania Map Quiz | 0 | - | 4.98 | 660,998 |
| Australian Capitals | 0 | - | 4.92 | 62,887 |
| European Physical Geography | 0 | - | 4.26 | 33,629 |
| Geography of Russia | 0 | - | 4.57 | 21,633 |
| History of Austria | 0 | - | 4.70 | 17,996 |
| Austria Country Quiz | 0 | - | 4.57 | 60,160 |
| Belgium Country Quiz | 0 | - | 4.72 | 72,426 |
| France Country Quiz | 0 | - | 4.70 | 135,893 |
| Biggest French Empire Countries | 0 | - | 4.49 | 65,422 |
| Geography of the French Empire | 0 | - | 4.45 | 27,245 |
| The French Revolution | 0 | - | 4.47 | 24,178 |
| France Multiple Choice | 0 | - | 4.39 | 40,885 |
| Tour de France Winners | 0 | - | 4.27 | 15,553 |
| History of France | 0 | - | 4.61 | 57,788 |
| Biggest Cities in Germany in 1910 | 0 | - | 4.41 | 23,584 |
| Greece Country Quiz | 0 | - | 4.74 | 66,757 |
| Italy Country Quiz | 0 | - | 4.77 | 124,303 |
| Roman Numeral Decoding Quiz | 0 | - | 4.94 | 440,785 |
| Two Letter Roman Numerals | 0 | - | 4.97 | 56,672 |
| Luxembourg Country Quiz | 0 | - | 4.78 | 34,019 |
| Monaco Country Quiz | 0 | - | 4.48 | 41,746 |
| Netherlands Country Quiz | 0 | - | 4.52 | 81,104 |
| Nordic Cities Map Quiz | 0 | - | 4.77 | 90,838 |
| The Vikings! | 0 | - | 4.46 | 28,434 |
| Portugal Country Quiz | 0 | - | 4.69 | 72,481 |
| The Portuguese Empire | 0 | - | 4.58 | 12,120 |
