| Netherlands Immigration by Country | 0 | - | 4.94 | 43,746 |
| European Countries by First 2 Letters | 0 | - | 4.95 | 526,056 |
| Most Guessed Cities in Europe - Not Capitals | 0 | - | 4.82 | 86,788 |
| European Geography By Letter - P #1 | 0 | - | 4.81 | 96,270 |
| European Geography By Letter - B #2 | 0 | - | 4.83 | 76,130 |
| Save Europeans by Guessing Countries | 0 | - | 4.84 | 209,105 |
| Category Elimination - European Geography #3 | 0 | - | 4.85 | 79,661 |
| States of Germany | 0 | - | 4.96 | 149,822 |
| Germany Immigration by Country | 0 | - | 4.84 | 79,923 |
| Regions of Italy | 0 | - | 4.92 | 74,607 |
| History of The Netherlands | 0 | - | 4.46 | 17,299 |
| Regions of Spain Quiz | 0 | - | 4.90 | 112,167 |
| Cantons of Switzerland | 0 | - | 4.98 | 50,067 |
| Famous Dutch and Belgian People | 0 | - | 4.56 | 17,955 |
| Departments of France | 0 | - | 4.93 | 52,686 |
| Famous Germans | 0 | - | 4.50 | 54,567 |
| Famous Italians by Clue | 0 | - | 4.45 | 88,261 |
| Countries Surrounding Rome | 0 | - | 4.97 | 49,344 |
| Provinces of the Netherlands | 0 | - | 4.80 | 40,739 |
| England or Wales? | 0 | - | 4.94 | 45,284 |
| Count to 10 in Europe: Pro | 0 | - | 4.85 | 68,534 |
| Official European Union Languages | 0 | - | 4.97 | 236,377 |
| European Countries in their Native Language | 0 | - | 4.99 | 156,614 |
| Europe by Borders in 30 Seconds | 0 | - | 4.98 | 424,912 |
| United Kingdom A-Z | 0 | - | 4.53 | 87,170 |
| Pre-Euro Currencies | 0 | - | 4.44 | 52,425 |
| Modern Day Countries of the Dutch Empire on a Map | 0 | - | 4.87 | 60,297 |
| The British Royal Family - Modern Times | 0 | - | 4.16 | 21,454 |
| English Monarchs in Order by First Letter | 0 | - | 4.38 | 31,292 |
| Europe Geography Decoder | 0 | - | 4.86 | 69,489 |
| The Mafia Quiz | 0 | - | 4.46 | 23,194 |
| Countries that Beat Switzerland | 0 | - | 4.88 | 41,535 |
| Geography of the Dutch Empire | 0 | - | 4.62 | 34,466 |
| Add A Letter - Make a European City | 0 | - | 4.90 | 23,226 |
| Celtic Nations | 0 | - | 4.69 | 46,797 |
| European Geography By Letter - A | 0 | - | 4.56 | 132,318 |
| European Geography By Letter - B #1 | 0 | - | 4.64 | 110,828 |
| European Geography By Letter - C | 0 | - | 4.46 | 111,768 |
| European Geography By Letter - D | 0 | - | 4.50 | 106,638 |
| European Geography By Letter - L | 0 | - | 4.52 | 112,164 |
| European Geography By Letter - M | 0 | - | 4.61 | 128,789 |
| European Geography By Letter - N | 0 | - | 4.44 | 99,625 |
| European Geography By Letter - R | 0 | - | 4.42 | 92,586 |
| European Geography By Letter - V | 0 | - | 4.43 | 91,991 |
| European Geography By Letter - T | 0 | - | 4.41 | 81,245 |
| European Geography By Letter - S #1 | 0 | - | 4.63 | 99,557 |
| Countries of Europe with an Empty Map | 0 | - | 5.00 | 307,591 |
| All First-Level Subdivisions of Europe on a Map | 0 | - | 4.98 | 167,583 |
| Famous Swiss and Austrian People | 0 | - | 4.45 | 14,549 |
| Regions of France | 0 | - | 4.78 | 119,061 |
| France A-Z | 0 | - | 4.16 | 38,042 |
| France Immigration by Country | 0 | - | 4.72 | 75,923 |
| German Groups of Things | 0 | - | 4.46 | 38,291 |
| Germany Multiple Choice | 0 | - | 4.84 | 54,016 |
| Germany True or False? | 0 | - | 4.61 | 48,508 |
| Largest Islands of Greece | 0 | - | 4.59 | 47,402 |
| Switzerland A-Z | 0 | - | 4.45 | 25,493 |
| 100 Greatest Britons Quiz | 0 | - | 4.41 | 48,027 |
| Counties of England | 0 | - | 4.97 | 788,460 |
| Foods in a Full English Breakfast | 0 | - | 4.46 | 101,872 |
| The UK for Americans - True or False | 0 | - | 4.46 | 58,366 |
| "Big Five" European Soccer Champions Since 2000 | 0 | - | 4.97 | 349,273 |
| U.S. Citizenship Test Questions | 0 | - | 4.83 | 238,193 |
| Catholic Countries in Europe | 0 | - | 4.83 | 94,123 |
| Monarchies of Europe | 0 | - | 4.90 | 97,226 |
| Federal Subjects of Russia | 0 | - | 4.94 | 143,648 |
| Famous French People | 0 | - | 4.12 | 27,884 |
| Regions of France Map Quiz | 0 | - | 4.97 | 143,017 |
| States of Germany Map Quiz | 0 | - | 4.91 | 131,571 |
| Famous Nordic People | 0 | - | 4.34 | 19,824 |
| Famous Spaniards Quiz | 0 | - | 4.24 | 11,539 |
| UK Cities Map Quiz | 0 | - | 4.95 | 461,944 |
| Countries and Territories of the United Kingdom | 0 | - | 4.89 | 92,851 |
| Counties of England Map Quiz | 0 | - | 4.97 | 305,964 |
| People on Money - England | 0 | - | 4.29 | 16,559 |
| Champions League Winners | 0 | - | 4.92 | 995,250 |
| Asian Geography By Letter - B | 0 | - | 4.85 | 65,931 |
| Monarchies of Asia | 0 | - | 4.97 | 70,545 |
| Biggest Countries in Europe in 1700 | 0 | - | 4.73 | 58,101 |
| Kings of France Quiz | 0 | - | 4.20 | 32,539 |
| States of the German Confederation in 1848 | 0 | - | 4.89 | 31,486 |
| Netherlands Country Quiz | 0 | - | 4.50 | 79,913 |
| Sweden Immigration by Country | 0 | - | 4.55 | 55,659 |
| 10 Closest Megacities to London | 0 | - | 4.90 | 17,393 |
| European Geography By Letter - E | 0 | - | 4.23 | 112,153 |
| European Geography By Letter - F | 0 | - | 4.17 | 91,395 |
| European Geography By Letter - H | 0 | - | 4.30 | 94,841 |
| European Geography By Letter - G | 0 | - | 4.25 | 101,215 |
| European Geography By Letter - I | 0 | - | 4.10 | 94,435 |
| European Geography By Letter - K | 0 | - | 4.14 | 69,111 |
| European Geography By Letter - O | 0 | - | 4.28 | 61,886 |
| European Geography by Letter - W | 0 | - | 4.20 | 82,269 |
| European Geography By Letter - S #2 | 0 | - | 4.19 | 50,479 |
| European Geography A-Z | 0 | - | 4.28 | 48,960 |
| Category Elimination - European Geography #1 | 0 | - | 4.98 | 230,269 |
| European Map without 10 Random Countries | 0 | - | 4.97 | 274,009 |
| Category Elimination - European Geography #2 | 0 | - | 4.99 | 164,937 |
| France Cities Map Quiz | 0 | - | 4.96 | 165,082 |
| Word Chain - France | 0 | - | 4.38 | 42,569 |
| Germany Country Quiz | 0 | - | 4.82 | 156,418 |
| Germany Cities Map Quiz | 0 | - | 4.87 | 125,071 |
| Ancient Greek Trivia | 0 | - | 4.62 | 66,743 |
| Geography of Ancient Greece | 0 | - | 4.69 | 31,756 |
| Italy Country Quiz | 0 | - | 4.82 | 122,093 |
| Regions of Italy Map Quiz | 0 | - | 4.96 | 148,265 |
| Italy Cities Map Quiz | 0 | - | 4.97 | 150,992 |
| Italian Foods | 0 | - | 4.30 | 72,126 |
| Spain Cities Map Quiz | 0 | - | 4.87 | 95,879 |
| Regions of Spain Map Quiz | 0 | - | 4.95 | 184,532 |
| Canary Islands | 0 | - | 4.61 | 17,390 |
| Biggest Spanish Empire Countries | 0 | - | 4.91 | 114,684 |
| Switzerland Immigration by Country | 0 | - | 4.70 | 29,096 |
| British Spellings | 0 | - | 4.07 | 99,191 |
| British Groups of Things | 0 | - | 4.25 | 82,659 |
| British Acronyms | 0 | - | 4.39 | 45,603 |
| UK Immigration by Country | 0 | - | 4.94 | 139,503 |
| United Kingdom Decoder | 0 | - | 4.29 | 39,942 |
| United Kingdom Country Quiz | 0 | - | 4.96 | 137,999 |
| Modern-Day Countries of the British Empire in 1921 | 0 | - | 4.99 | 116,131 |
| Geography of Scotland | 0 | - | 4.63 | 21,468 |
| Famous Scottish People | 0 | - | 4.22 | 18,319 |
| All UEFA Champions League Teams Ever | 0 | - | 4.84 | 128,313 |
| European Countries with the Fewest Overnight Visitors | 0 | - | 4.78 | 41,596 |
| Word Scramble - European Countries | 0 | - | 4.74 | 140,919 |
| Top 20 Football Clubs in Europe | 0 | - | 4.48 | 112,838 |
| Name a Major European City A-Z | 0 | - | 4.33 | 49,072 |
| 100 Longest Rivers in Europe - with a Map | 0 | - | 4.94 | 64,753 |
| Slavic Languages | 0 | - | 4.67 | 53,935 |
| French Geography Quiz #1 | 0 | - | 4.89 | 34,492 |
| Andorra Country Quiz | 0 | - | 4.90 | 31,360 |
| French History Multiple Choice | 0 | - | 4.55 | 32,858 |
| History of Germany | 0 | - | 4.39 | 52,593 |
| Letters of the Greek Alphabet | 0 | - | 4.97 | 641,301 |
| Name that Greek Letter | 0 | - | 4.94 | 321,457 |
| Capitals of Italian Regions | 0 | - | 4.62 | 36,419 |
| Spanish Immigration by Country | 0 | - | 4.63 | 55,228 |
| Most Common First Names in Spain | 0 | - | 4.27 | 45,460 |
| Modern Day Countries of the Spanish Empire on a Map | 0 | - | 4.95 | 85,421 |
| Most Common Surnames in the UK | 0 | - | 4.21 | 69,421 |
| Fictional Characters from Great Britain | 0 | - | 4.24 | 41,904 |
| Wonderwall Lyrics | 0 | - | 4.25 | 73,412 |
| Malta Country Quiz | 0 | - | 4.81 | 30,795 |
| Africa A-Z | 0 | - | 4.57 | 46,346 |
| African Countries by First 2 Letters | 0 | - | 4.96 | 266,368 |
| Top European Languages on a Map | 0 | - | 4.77 | 131,022 |
| Famous Russians | 0 | - | 4.16 | 23,711 |
| History of Russia Quiz | 0 | - | 4.49 | 31,774 |
| Russia Multiple Choice | 0 | - | 4.58 | 40,549 |
| Movies Set in France | 0 | - | 4.26 | 13,066 |
| French Inventions | 0 | - | 4.08 | 13,859 |
| Country Quiz on a Map - France | 0 | - | 4.98 | 46,550 |
| History of Paris | 0 | - | 4.24 | 13,612 |
| Word Chain - Germany | 0 | - | 4.31 | 22,471 |
| Country Quiz on a Map - Germany | 0 | - | 4.95 | 34,401 |
| Ancient Greece A-Z | 0 | - | 4.60 | 22,972 |
| The Trojan War | 0 | - | 4.83 | 39,400 |
| Greek Mythology General Knowledge #1 | 0 | - | 4.85 | 110,377 |
| 101 Figures from Greek Mythology | 0 | - | 4.99 | 124,092 |
| Famous Irish People | 0 | - | 4.05 | 45,848 |
| History of Italy | 0 | - | 4.55 | 31,800 |
| Word Chain - Italy | 0 | - | 4.07 | 23,079 |
| Italy Multiple Choice | 0 | - | 4.74 | 103,104 |
| Embarrassing Chapters in Italian History | 0 | - | 4.24 | 12,032 |
| Ancient Roman Trivia #1 | 0 | - | 4.85 | 83,985 |
| Roman Emperors | 0 | - | 4.95 | 118,320 |
| Countries of the Spanish Empire | 0 | - | 4.52 | 76,963 |
| Word Chain - United Kingdom | 0 | - | 4.05 | 29,233 |
| Name a Valid English City | 0 | - | 4.19 | 16,623 |
| London A-Z | 0 | - | 4.10 | 40,624 |
| Asian Cities A-Z by Clue | 0 | - | 4.53 | 33,508 |
| Asian Countries by First 2 Letters | 0 | - | 4.91 | 276,967 |
| Major non-NATO U.S. Allies | 0 | - | 4.52 | 51,693 |
| Europe Map Quiz | 0 | - | 5.00 | 4,728,063 |
| Europe Geography Quiz #1 | 0 | - | 4.54 | 70,963 |
| Europe Geography Quiz #2 | 0 | - | 4.57 | 71,585 |
| Europe Geography Quiz #4 | 0 | - | 4.57 | 69,913 |
| Europe Geography Quiz #5 | 0 | - | 4.54 | 60,955 |
| Four Letter European Geography #1 | 0 | - | 4.44 | 27,093 |
| Four Letter European Geography #2 | 0 | - | 4.57 | 19,578 |
| Capitals of French Regions | 0 | - | 4.45 | 15,979 |
| Capitals of German States | 0 | - | 4.74 | 28,799 |
| Chancellors of Germany, 1949–present | 0 | - | 4.60 | 23,080 |
| Olympian Gods Quiz | 0 | - | 4.96 | 495,016 |
| Ancient Greek Words | 0 | - | 4.92 | 110,562 |
| British to American Food Translation | 0 | - | 3.38 | 51,802 |
| Things British People Know that Americans Don't | 0 | - | 4.25 | 51,249 |
| Name Every Beatles Song | 0 | - | 4.97 | 233,848 |
| Bohemian Rhapsody Lyrics | 0 | - | 4.98 | 290,210 |
| Asian Geography By Letter - A | 0 | - | 4.64 | 70,779 |
| Asian Geography by Letter - H | 0 | - | 4.49 | 65,350 |
| Asian Geography By Letter - M | 0 | - | 4.47 | 61,115 |
| Asian Geography by Letter - P | 0 | - | 4.45 | 57,526 |
| Asian Geography by Letter - T | 0 | - | 4.50 | 57,024 |
| Asian Geography By Letter - L | 0 | - | 4.49 | 42,663 |
| Middle East A-Z | 0 | - | 4.46 | 45,750 |
| 100 Most Common English Words | 0 | - | 4.88 | 1,303,667 |
| Africa Map Quiz | 0 | - | 5.00 | 2,102,982 |
| Oceania Map Quiz | 0 | - | 4.98 | 634,582 |
| Australian Capitals | 0 | - | 4.92 | 62,586 |
| Canada A-Z | 0 | - | 4.73 | 32,630 |
