| European Countries by First 2 Letters | 0 | - | 4.95 | 527,037 |
| Save Europeans by Guessing Countries | 0 | - | 4.84 | 210,370 |
| States of Germany | 0 | - | 4.96 | 150,679 |
| Germany Immigration by Country | 0 | - | 4.85 | 80,215 |
| Regions of Italy | 0 | - | 4.92 | 74,989 |
| Netherlands Immigration by Country | 0 | - | 4.94 | 43,993 |
| Regions of Spain Quiz | 0 | - | 4.90 | 112,828 |
| Cantons of Switzerland | 0 | - | 4.98 | 50,540 |
| Most Common U.S. Last Names - Extreme | 0 | - | 4.94 | 173,506 |
| Category Elimination - European Geography #1 | 0 | - | 4.98 | 231,164 |
| European Map without 10 Random Countries | 0 | - | 4.97 | 274,735 |
| Category Elimination - European Geography #2 | 0 | - | 4.99 | 165,647 |
| Departments of France | 0 | - | 4.93 | 53,074 |
| German Groups of Things | 0 | - | 4.46 | 38,350 |
| Countries Surrounding Rome | 0 | - | 4.97 | 49,409 |
| Most Common First Names in Spain | 0 | - | 4.27 | 45,508 |
| Most Common Surnames in the UK | 0 | - | 4.21 | 69,509 |
| Foods in a Full English Breakfast | 0 | - | 4.46 | 102,178 |
| England or Wales? | 0 | - | 4.94 | 45,422 |
| Count to 10 in Europe: Pro | 0 | - | 4.86 | 68,744 |
| Official European Union Languages | 0 | - | 4.97 | 237,328 |
| European Countries in their Native Language | 0 | - | 4.99 | 157,130 |
| Europe by Borders in 30 Seconds | 0 | - | 4.98 | 425,940 |
| French Geography Quiz #1 | 0 | - | 4.89 | 34,573 |
| Europe Geography Decoder | 0 | - | 4.86 | 69,645 |
| Word Chain - France | 0 | - | 4.38 | 42,634 |
| Country Quiz on a Map - France | 0 | - | 4.98 | 46,735 |
| Country Quiz on a Map - Germany | 0 | - | 4.95 | 34,607 |
| Italian Foods | 0 | - | 4.31 | 72,332 |
| Countries that Beat Portugal | 0 | - | 4.86 | 58,847 |
| Countries that Beat Switzerland | 0 | - | 4.88 | 41,625 |
| British Groups of Things | 0 | - | 4.25 | 82,736 |
| United Kingdom Decoder | 0 | - | 4.29 | 39,976 |
| Add A Letter - Make a European City | 0 | - | 4.90 | 23,267 |
| Celtic Nations | 0 | - | 4.69 | 46,843 |
| Europe Geography Quiz #1 | 0 | - | 4.54 | 71,061 |
| Europe Geography Quiz #2 | 0 | - | 4.57 | 71,702 |
| Countries of Europe - One Minute Sprint | 0 | - | 4.94 | 1,321,872 |
| Europe Geography Quiz #4 | 0 | - | 4.57 | 70,016 |
| Europe Geography Quiz #5 | 0 | - | 4.54 | 61,056 |
| Most Guessed Cities in Europe - Not Capitals | 0 | - | 4.82 | 86,986 |
| Countries of Europe with an Empty Map | 0 | - | 5.00 | 308,821 |
| All First-Level Subdivisions of Europe on a Map | 0 | - | 4.98 | 168,857 |
| Regions of France | 0 | - | 4.78 | 119,646 |
| France Immigration by Country | 0 | - | 4.72 | 76,085 |
| Famous Germans | 0 | - | 4.50 | 54,747 |
| Germany Multiple Choice | 0 | - | 4.84 | 54,131 |
| Germany True or False? | 0 | - | 4.61 | 48,607 |
| States of the German Confederation in 1848 | 0 | - | 4.89 | 31,664 |
| Largest Islands of Greece | 0 | - | 4.59 | 47,624 |
| Famous Italians by Clue | 0 | - | 4.45 | 88,736 |
| Provinces of the Netherlands | 0 | - | 4.80 | 40,950 |
| 100 Greatest Britons Quiz | 0 | - | 4.41 | 48,107 |
| Fictional Characters from Great Britain | 0 | - | 4.24 | 41,948 |
| Counties of England | 0 | - | 4.97 | 791,133 |
| The UK for Americans - True or False | 0 | - | 4.43 | 58,453 |
| "Big Five" European Soccer Champions Since 2000 | 0 | - | 4.97 | 351,401 |
| Africa Geography Quiz #1 | 0 | - | 4.93 | 49,051 |
| American Countries with the Shortest Names | 0 | - | 4.96 | 120,507 |
| European Geography By Letter - P #1 | 0 | - | 4.81 | 96,527 |
| Catholic Countries in Europe | 0 | - | 4.83 | 94,421 |
| European Geography By Letter - B #2 | 0 | - | 4.84 | 76,526 |
| Category Elimination - European Geography #3 | 0 | - | 4.85 | 80,073 |
| Federal Subjects of Russia | 0 | - | 4.94 | 144,766 |
| Regions of France Map Quiz | 0 | - | 4.97 | 143,504 |
| States of Germany Map Quiz | 0 | - | 4.91 | 131,999 |
| Word Chain - Germany | 0 | - | 4.31 | 22,503 |
| Word Chain - Italy | 0 | - | 4.07 | 23,118 |
| Most Common Last Names in Sweden | 0 | - | 4.49 | 15,313 |
| UK Cities Map Quiz | 0 | - | 4.95 | 462,807 |
| Countries and Territories of the United Kingdom | 0 | - | 4.89 | 93,199 |
| Counties of England Map Quiz | 0 | - | 4.97 | 306,412 |
| Word Chain - United Kingdom | 0 | - | 4.05 | 29,263 |
| Members of the British Royal Family | 0 | - | 4.10 | 113,864 |
| Name a Valid English City | 0 | - | 4.19 | 16,654 |
| Champions League Winners | 0 | - | 4.92 | 998,771 |
| Asian Countries with the Shortest Names | 0 | - | 4.97 | 134,586 |
| Divided World City Name Puzzle #1 | 0 | - | 4.87 | 48,235 |
| Divided World City Name Puzzle #2 | 0 | - | 4.83 | 36,581 |
| Countries by Initial Letter and Continent #3 | 0 | - | 4.93 | 48,001 |
| Countries by Initial Letter and Continent #2 | 0 | - | 4.91 | 95,799 |
| U.S. State Nicknames Quiz | 0 | - | 4.47 | 50,344 |
| Biggest Countries in Europe in 1700 | 0 | - | 4.73 | 58,230 |
| Sweden Immigration by Country | 0 | - | 4.55 | 55,765 |
| Portugal Country Quiz | 0 | - | 4.69 | 71,503 |
| United Kingdom A-Z | 0 | - | 4.53 | 87,355 |
| 10 Closest Megacities to London | 0 | - | 4.90 | 17,583 |
| Category Elimination - African Geography #1 | 0 | - | 4.90 | 91,320 |
| Name a Valid African Country | 0 | - | 4.98 | 153,200 |
| Hispanic Last Names in the U.S. | 0 | - | 4.31 | 54,647 |
| 75 Americans Named John | 0 | - | 4.41 | 23,843 |
| Europe Geography Quiz #3 | 0 | - | 4.34 | 63,460 |
| Name a Valid European Country #1 | 0 | - | 4.99 | 257,798 |
| Name a Valid European Country #2 | 0 | - | 4.94 | 113,582 |
| France Cities Map Quiz | 0 | - | 4.96 | 165,460 |
| Germany Country Quiz | 0 | - | 4.82 | 156,880 |
| Germany Cities Map Quiz | 0 | - | 4.87 | 125,393 |
| Ancient Greek Trivia | 0 | - | 4.62 | 66,829 |
| Geography of Ancient Greece | 0 | - | 4.69 | 31,807 |
| Italy Country Quiz | 0 | - | 4.82 | 122,475 |
| Regions of Italy Map Quiz | 0 | - | 4.96 | 148,643 |
| Italy Cities Map Quiz | 0 | - | 4.97 | 151,311 |
| The Mafia Quiz | 0 | - | 4.46 | 23,224 |
| History of The Netherlands | 0 | - | 4.46 | 17,347 |
| Spain Cities Map Quiz | 0 | - | 4.87 | 96,266 |
| Regions of Spain Map Quiz | 0 | - | 4.95 | 184,862 |
| Canary Islands | 0 | - | 4.61 | 17,425 |
| Biggest Spanish Empire Countries | 0 | - | 4.91 | 115,239 |
| Switzerland Immigration by Country | 0 | - | 4.70 | 29,284 |
| British Spellings | 0 | - | 4.07 | 99,319 |
| British to American Food Translation | 0 | - | 3.38 | 51,889 |
| British Acronyms | 0 | - | 4.39 | 45,668 |
| UK Immigration by Country | 0 | - | 4.94 | 139,939 |
| United Kingdom Country Quiz | 0 | - | 4.96 | 138,565 |
| Modern-Day Countries of the British Empire in 1921 | 0 | - | 4.99 | 116,601 |
| Geography of Scotland | 0 | - | 4.63 | 21,516 |
| All UEFA Champions League Teams Ever | 0 | - | 4.85 | 128,887 |
| Asian Last Names in the United States | 0 | - | 4.43 | 46,568 |
| Category Elimination - Asian Geography #1 | 0 | - | 4.85 | 109,009 |
| Category Elimination - Asian Geography #2 | 0 | - | 4.94 | 95,814 |
| Name a Valid Asian Country | 0 | - | 4.98 | 120,263 |
| U.S. Baby Boy Names by Decade | 0 | - | 4.55 | 487,198 |
| U.S. Baby Girl Names by Decade | 0 | - | 4.42 | 710,427 |
| Pre-Euro Currencies | 0 | - | 4.44 | 52,485 |
| European Countries with the Fewest Overnight Visitors | 0 | - | 4.78 | 41,614 |
| Word Scramble - European Countries | 0 | - | 4.70 | 141,136 |
| Top 20 Football Clubs in Europe | 0 | - | 4.48 | 113,509 |
| 100 Longest Rivers in Europe - with a Map | 0 | - | 4.94 | 65,007 |
| Category Elimination - European Countries #1 | 0 | - | 4.89 | 89,234 |
| Slavic Languages | 0 | - | 4.68 | 54,083 |
| Andorra Country Quiz | 0 | - | 4.90 | 31,476 |
| Famous Swiss and Austrian People | 0 | - | 4.45 | 14,572 |
| Famous Dutch and Belgian People | 0 | - | 4.56 | 17,984 |
| France A-Z | 0 | - | 4.16 | 38,094 |
| French History Multiple Choice | 0 | - | 4.55 | 32,913 |
| History of Germany | 0 | - | 4.39 | 52,675 |
| Letters of the Greek Alphabet | 0 | - | 4.97 | 643,463 |
| Name that Greek Letter | 0 | - | 4.94 | 322,143 |
| Capitals of Italian Regions | 0 | - | 4.62 | 36,487 |
| Modern Day Countries of the Dutch Empire on a Map | 0 | - | 4.87 | 60,527 |
| Spanish Immigration by Country | 0 | - | 4.63 | 55,296 |
| Countries of Iberia in History with a Map | 0 | - | 4.87 | 41,255 |
| Modern Day Countries of the Spanish Empire on a Map | 0 | - | 4.95 | 85,692 |
| Switzerland A-Z | 0 | - | 4.45 | 25,545 |
| Wonderwall Lyrics | 0 | - | 4.25 | 73,525 |
| Malta Country Quiz | 0 | - | 4.81 | 30,887 |
| Topological Map of Asia Quiz | 0 | - | 4.81 | 19,949 |
| African Countries by First 2 Letters | 0 | - | 4.96 | 266,877 |
| Countries that Beat the United States | 0 | - | 4.93 | 165,900 |
| Countries that Beat Canada | 0 | - | 4.90 | 87,010 |
| Top European Languages on a Map | 0 | - | 4.77 | 131,400 |
| History of Russia Quiz | 0 | - | 4.49 | 31,820 |
| Russia Multiple Choice | 0 | - | 4.58 | 40,611 |
| Countries that Beat Russia | 0 | - | 4.81 | 82,108 |
| French Geography Quiz #2 | 0 | - | 4.62 | 23,127 |
| Famous French People | 0 | - | 4.12 | 28,081 |
| Movies Set in France | 0 | - | 4.26 | 13,090 |
| French Inventions | 0 | - | 4.08 | 13,871 |
| French Foods | 0 | - | 4.00 | 27,613 |
| History of Paris | 0 | - | 4.24 | 13,625 |
| The Trojan War | 0 | - | 4.83 | 39,504 |
| Greek Mythology General Knowledge #1 | 0 | - | 4.85 | 110,916 |
| 101 Figures from Greek Mythology | 0 | - | 4.99 | 124,782 |
| History of Italy | 0 | - | 4.55 | 31,866 |
| Italy Multiple Choice | 0 | - | 4.74 | 103,332 |
| Embarrassing Chapters in Italian History | 0 | - | 4.24 | 12,057 |
| Ancient Roman Trivia #1 | 0 | - | 4.85 | 84,180 |
| Roman Emperors | 0 | - | 4.95 | 118,841 |
| Geography of the Dutch Empire | 0 | - | 4.61 | 34,524 |
| Famous Nordic People | 0 | - | 4.34 | 19,930 |
| Countries that Beat Iceland | 0 | - | 4.81 | 42,448 |
| Famous Spaniards Quiz | 0 | - | 4.24 | 11,557 |
| Countries of the Spanish Empire | 0 | - | 4.52 | 77,042 |
| Geography of Spain | 0 | - | 4.59 | 22,000 |
| The British Royal Family - Modern Times | 0 | - | 4.16 | 21,485 |
| People on Money - England | 0 | - | 4.29 | 16,578 |
| English Monarchs in Order by First Letter | 0 | - | 4.38 | 31,442 |
| Asian Countries by First 2 Letters | 0 | - | 4.91 | 277,828 |
| Countries that Beat Indonesia | 0 | - | 4.86 | 55,372 |
| Last Names by Country of Origin | 0 | - | 4.63 | 156,047 |
| Africa Geography Quiz #2 | 0 | - | 4.59 | 32,835 |
| Random Sequential Oceanic Countries on a Map | 0 | - | 4.97 | 26,951 |
| Last Names in U.S. History #1 | 0 | - | 4.25 | 36,118 |
| European Geography By Letter - A | 0 | - | 4.61 | 132,589 |
| European Geography By Letter - B #1 | 0 | - | 4.67 | 111,053 |
| European Geography By Letter - C | 0 | - | 4.46 | 112,018 |
| European Geography By Letter - D | 0 | - | 4.50 | 106,898 |
| European Geography By Letter - L | 0 | - | 4.52 | 112,370 |
| European Geography By Letter - M | 0 | - | 4.64 | 129,159 |
| European Geography By Letter - N | 0 | - | 4.44 | 99,968 |
| European Geography By Letter - R | 0 | - | 4.42 | 92,742 |
| European Geography By Letter - V | 0 | - | 4.43 | 92,116 |
| European Geography By Letter - T | 0 | - | 4.41 | 81,478 |
| Europe Map Quiz | 0 | - | 5.00 | 4,739,590 |
| European Geography By Letter - S #1 | 0 | - | 4.63 | 99,718 |
| Four Letter European Geography #1 | 0 | - | 4.44 | 27,300 |
| Four Letter European Geography #2 | 0 | - | 4.57 | 19,736 |
| Capitals of French Regions | 0 | - | 4.45 | 16,007 |
| Kings of France Quiz | 0 | - | 4.20 | 32,597 |
| Capitals of German States | 0 | - | 4.74 | 28,869 |
