| European Countries by First 2 Letters | 0 | - | 4.95 | 527,867 |
| Save Europeans by Guessing Countries | 0 | - | 4.83 | 211,144 |
| States of Germany | 0 | - | 4.96 | 151,155 |
| Germany Immigration by Country | 0 | - | 4.85 | 80,579 |
| Regions of Italy | 0 | - | 4.92 | 75,238 |
| Netherlands Immigration by Country | 0 | - | 4.93 | 49,417 |
| Regions of Spain Quiz | 0 | - | 4.90 | 113,215 |
| Cantons of Switzerland | 0 | - | 4.98 | 50,761 |
| Most Common U.S. Last Names - Extreme | 0 | - | 4.94 | 173,787 |
| Category Elimination - European Geography #1 | 0 | - | 4.98 | 231,870 |
| European Map without 10 Random Countries | 0 | - | 4.97 | 275,780 |
| Category Elimination - European Geography #2 | 0 | - | 4.99 | 166,151 |
| Departments of France | 0 | - | 4.93 | 53,376 |
| German Groups of Things | 0 | - | 4.46 | 38,387 |
| Countries Surrounding Rome | 0 | - | 4.97 | 49,447 |
| Most Common First Names in Spain | 0 | - | 4.27 | 45,541 |
| Most Common Surnames in the UK | 0 | - | 4.21 | 69,575 |
| Foods in a Full English Breakfast | 0 | - | 4.46 | 102,853 |
| England or Wales? | 0 | - | 4.94 | 45,499 |
| Count to 10 in Europe: Pro | 0 | - | 4.86 | 68,867 |
| Official European Union Languages | 0 | - | 4.97 | 237,704 |
| European Countries in their Native Language | 0 | - | 4.99 | 157,341 |
| Europe by Borders in 30 Seconds | 0 | - | 4.98 | 426,621 |
| French Geography Quiz #1 | 0 | - | 4.89 | 34,642 |
| Europe Geography Decoder | 0 | - | 4.86 | 69,759 |
| Word Chain - France | 0 | - | 4.38 | 42,680 |
| Country Quiz on a Map - France | 0 | - | 4.98 | 46,891 |
| Country Quiz on a Map - Germany | 0 | - | 4.95 | 34,774 |
| Italian Foods | 0 | - | 4.31 | 72,478 |
| Countries that Beat Switzerland | 0 | - | 4.88 | 41,673 |
| British Groups of Things | 0 | - | 4.25 | 82,782 |
| United Kingdom Decoder | 0 | - | 4.29 | 39,998 |
| Add A Letter - Make a European City | 0 | - | 4.90 | 23,319 |
| Celtic Nations | 0 | - | 4.69 | 46,875 |
| Europe Geography Quiz #1 | 0 | - | 4.54 | 71,145 |
| Europe Geography Quiz #2 | 0 | - | 4.57 | 71,790 |
| Countries of Europe - One Minute Sprint | 0 | - | 4.94 | 1,323,689 |
| Europe Geography Quiz #4 | 0 | - | 4.57 | 70,084 |
| Europe Geography Quiz #5 | 0 | - | 4.54 | 61,128 |
| Most Guessed Cities in Europe - Not Capitals | 0 | - | 4.82 | 87,118 |
| Countries of Europe with an Empty Map | 0 | - | 5.00 | 309,404 |
| All First-Level Subdivisions of Europe on a Map | 0 | - | 4.98 | 169,564 |
| Famous Swiss and Austrian People | 0 | - | 4.45 | 14,592 |
| Regions of France | 0 | - | 4.77 | 120,002 |
| France Immigration by Country | 0 | - | 4.72 | 76,230 |
| Famous Germans | 0 | - | 4.50 | 54,854 |
| Germany Multiple Choice | 0 | - | 4.84 | 54,204 |
| Germany True or False? | 0 | - | 4.61 | 48,664 |
| States of the German Confederation in 1848 | 0 | - | 4.89 | 31,772 |
| Largest Islands of Greece | 0 | - | 4.59 | 47,745 |
| Famous Italians by Clue | 0 | - | 4.45 | 88,908 |
| Provinces of the Netherlands | 0 | - | 4.80 | 41,077 |
| 100 Greatest Britons Quiz | 0 | - | 4.41 | 48,160 |
| Fictional Characters from Great Britain | 0 | - | 4.24 | 41,972 |
| Counties of England | 0 | - | 4.97 | 792,765 |
| The UK for Americans - True or False | 0 | - | 4.43 | 58,510 |
| "Big Five" European Soccer Champions Since 2000 | 0 | - | 4.97 | 352,677 |
| Africa Geography Quiz #1 | 0 | - | 4.93 | 49,209 |
| American Countries with the Shortest Names | 0 | - | 4.96 | 120,746 |
| European Geography By Letter - P #1 | 0 | - | 4.81 | 96,633 |
| Catholic Countries in Europe | 0 | - | 4.83 | 94,625 |
| European Geography By Letter - B #2 | 0 | - | 4.84 | 76,712 |
| Category Elimination - European Geography #3 | 0 | - | 4.85 | 80,366 |
| Federal Subjects of Russia | 0 | - | 4.94 | 145,375 |
| Regions of France Map Quiz | 0 | - | 4.97 | 143,831 |
| States of Germany Map Quiz | 0 | - | 4.91 | 132,193 |
| Word Chain - Germany | 0 | - | 4.31 | 22,529 |
| Word Chain - Italy | 0 | - | 4.07 | 23,136 |
| Most Common Last Names in Sweden | 0 | - | 4.49 | 15,342 |
| UK Cities Map Quiz | 0 | - | 4.96 | 463,346 |
| Countries and Territories of the United Kingdom | 0 | - | 4.89 | 93,365 |
| Counties of England Map Quiz | 0 | - | 4.97 | 306,683 |
| Word Chain - United Kingdom | 0 | - | 4.05 | 29,302 |
| Members of the British Royal Family | 0 | - | 4.10 | 113,923 |
| Name a Valid English City | 0 | - | 4.19 | 16,677 |
| Champions League Winners | 0 | - | 4.92 | 1,000,997 |
| Asian Countries with the Shortest Names | 0 | - | 4.97 | 134,806 |
| Divided World City Name Puzzle #1 | 0 | - | 4.87 | 48,364 |
| Divided World City Name Puzzle #2 | 0 | - | 4.83 | 36,685 |
| Countries by Initial Letter and Continent #3 | 0 | - | 4.93 | 48,227 |
| Countries by Initial Letter and Continent #2 | 0 | - | 4.91 | 95,929 |
| U.S. State Nicknames | 0 | - | 4.47 | 50,398 |
| Biggest Countries in Europe in 1700 | 0 | - | 4.73 | 58,299 |
| Austria Country Quiz | 0 | - | 4.57 | 59,542 |
| Sweden Immigration by Country | 0 | - | 4.55 | 55,899 |
| United Kingdom A-Z | 0 | - | 4.53 | 87,457 |
| 10 Closest Megacities to London | 0 | - | 4.90 | 17,622 |
| Category Elimination - African Geography #1 | 0 | - | 4.90 | 91,805 |
| Name a Valid African Country | 0 | - | 4.98 | 153,457 |
| Hispanic Last Names in the U.S. | 0 | - | 4.31 | 54,676 |
| 75 Americans Named John | 0 | - | 4.41 | 23,863 |
| Europe Geography Quiz #3 | 0 | - | 4.34 | 63,537 |
| Name a Valid European Country #1 | 0 | - | 4.99 | 258,852 |
| Name a Valid European Country #2 | 0 | - | 4.94 | 113,961 |
| Austria... or Australia? | 0 | - | 4.68 | 104,119 |
| France Cities Map Quiz | 0 | - | 4.96 | 165,914 |
| Germany Country Quiz | 0 | - | 4.82 | 157,221 |
| Germany Cities Map Quiz | 0 | - | 4.87 | 125,595 |
| Ancient Greek Trivia | 0 | - | 4.62 | 66,872 |
| Geography of Ancient Greece | 0 | - | 4.69 | 31,845 |
| Italy Country Quiz | 0 | - | 4.82 | 122,712 |
| Regions of Italy Map Quiz | 0 | - | 4.96 | 148,857 |
| Italy Cities Map Quiz | 0 | - | 4.97 | 151,505 |
| The Mafia Quiz | 0 | - | 4.46 | 23,254 |
| History of The Netherlands | 0 | - | 4.46 | 17,367 |
| Spain Cities Map Quiz | 0 | - | 4.87 | 96,458 |
| Regions of Spain Map Quiz | 0 | - | 4.95 | 185,070 |
| Canary Islands | 0 | - | 4.61 | 17,440 |
| Biggest Spanish Empire Countries | 0 | - | 4.91 | 115,457 |
| Switzerland Immigration by Country | 0 | - | 4.70 | 29,436 |
| British Spellings | 0 | - | 4.06 | 99,358 |
| British to American Food Translation | 0 | - | 3.38 | 51,909 |
| British Acronyms | 0 | - | 4.39 | 45,710 |
| UK Immigration by Country | 0 | - | 4.94 | 140,386 |
| United Kingdom Country Quiz | 0 | - | 4.96 | 139,006 |
| Modern-Day Countries of the British Empire in 1921 | 0 | - | 4.99 | 116,907 |
| Geography of Scotland | 0 | - | 4.63 | 21,555 |
| All UEFA Champions League Teams Ever | 0 | - | 4.85 | 129,300 |
| Asian Last Names in the United States | 0 | - | 4.43 | 46,613 |
| Category Elimination - Asian Geography #1 | 0 | - | 4.85 | 109,359 |
| Category Elimination - Asian Geography #2 | 0 | - | 4.94 | 96,075 |
| Name a Valid Asian Country | 0 | - | 4.98 | 120,508 |
| U.S. Baby Boy Names by Decade | 0 | - | 4.55 | 487,740 |
| U.S. Baby Girl Names by Decade | 0 | - | 4.42 | 711,054 |
| Pre-Euro Currencies | 0 | - | 4.44 | 52,515 |
| European Countries with the Fewest Overnight Visitors | 0 | - | 4.78 | 41,628 |
| Word Scramble - European Countries | 0 | - | 4.70 | 141,314 |
| Top 20 Football Clubs in Europe | 0 | - | 4.48 | 113,901 |
| 100 Longest Rivers in Europe - with a Map | 0 | - | 4.94 | 65,153 |
| Category Elimination - European Countries #1 | 0 | - | 4.89 | 89,514 |
| Slavic Languages | 0 | - | 4.68 | 54,159 |
| Andorra Country Quiz | 0 | - | 4.90 | 31,538 |
| Countries Bordering Austria | 0 | - | 4.97 | 118,042 |
| Famous Dutch and Belgian People | 0 | - | 4.56 | 18,003 |
| France A-Z | 0 | - | 4.16 | 38,116 |
| French History Multiple Choice | 0 | - | 4.55 | 32,953 |
| History of Germany | 0 | - | 4.39 | 52,728 |
| Letters of the Greek Alphabet | 0 | - | 4.97 | 644,747 |
| Name that Greek Letter | 0 | - | 4.93 | 322,598 |
| Capitals of Italian Regions | 0 | - | 4.62 | 36,526 |
| Modern Day Countries of the Dutch Empire on a Map | 0 | - | 4.86 | 60,719 |
| Spanish Immigration by Country | 0 | - | 4.63 | 55,363 |
| Countries of Iberia in History with a Map | 0 | - | 4.87 | 41,365 |
| Modern Day Countries of the Spanish Empire on a Map | 0 | - | 4.95 | 85,871 |
| Switzerland A-Z | 0 | - | 4.45 | 25,581 |
| Wonderwall Lyrics | 0 | - | 4.25 | 73,591 |
| Malta Country Quiz | 0 | - | 4.81 | 30,945 |
| Topological Map of Asia Quiz | 0 | - | 4.81 | 20,016 |
| Nicknames in World History | 0 | - | 4.74 | 37,609 |
| African Countries by First 2 Letters | 0 | - | 4.96 | 267,439 |
| Countries that Beat the United States | 0 | - | 4.93 | 166,178 |
| Countries that Beat Canada | 0 | - | 4.90 | 87,136 |
| Top European Languages on a Map | 0 | - | 4.77 | 131,609 |
| History of Russia Quiz | 0 | - | 4.49 | 31,847 |
| Russia Multiple Choice | 0 | - | 4.58 | 40,644 |
| Countries that Beat Russia | 0 | - | 4.81 | 82,273 |
| French Geography Quiz #2 | 0 | - | 4.62 | 23,158 |
| Modern Day Countries of Austria-Hungary on a Map | 0 | - | 4.98 | 103,219 |
| Famous French People | 0 | - | 4.12 | 28,145 |
| Movies Set in France | 0 | - | 4.26 | 13,100 |
| French Inventions | 0 | - | 4.08 | 13,877 |
| French Foods | 0 | - | 4.00 | 27,643 |
| History of Paris | 0 | - | 4.24 | 13,629 |
| The Trojan War | 0 | - | 4.83 | 39,577 |
| Greek Mythology General Knowledge #1 | 0 | - | 4.85 | 111,200 |
| 101 Figures from Greek Mythology | 0 | - | 4.99 | 125,134 |
| History of Italy | 0 | - | 4.55 | 31,907 |
| Italy Multiple Choice | 0 | - | 4.73 | 103,468 |
| Embarrassing Chapters in Italian History | 0 | - | 4.24 | 12,070 |
| Ancient Roman Trivia #1 | 0 | - | 4.85 | 84,300 |
| Roman Emperors | 0 | - | 4.95 | 119,298 |
| Geography of the Dutch Empire | 0 | - | 4.61 | 34,571 |
| Famous Nordic People | 0 | - | 4.34 | 19,993 |
| Countries that Beat Iceland | 0 | - | 4.81 | 42,546 |
| Countries that Beat Portugal | 0 | - | 4.86 | 58,964 |
| Famous Spaniards Quiz | 0 | - | 4.24 | 11,570 |
| Countries of the Spanish Empire | 0 | - | 4.52 | 77,103 |
| Geography of Spain | 0 | - | 4.59 | 22,021 |
| The British Royal Family - Modern Times | 0 | - | 4.16 | 21,503 |
| People on Money - England | 0 | - | 4.29 | 16,591 |
| English Monarchs in Order by First Letter | 0 | - | 4.38 | 31,518 |
| Asian Countries by First 2 Letters | 0 | - | 4.91 | 278,215 |
| Countries that Beat Indonesia | 0 | - | 4.86 | 55,511 |
| Last Names by Country of Origin | 0 | - | 4.63 | 156,191 |
| Africa Geography Quiz #2 | 0 | - | 4.59 | 32,909 |
| Random Sequential Oceanic Countries on a Map | 0 | - | 4.97 | 27,025 |
| Last Names in U.S. History #1 | 0 | - | 4.25 | 36,154 |
| European Geography By Letter - A | 0 | - | 4.61 | 132,697 |
| European Geography By Letter - B #1 | 0 | - | 4.67 | 111,141 |
| European Geography By Letter - C | 0 | - | 4.46 | 112,119 |
| European Geography By Letter - D | 0 | - | 4.50 | 107,000 |
| European Geography By Letter - L | 0 | - | 4.52 | 112,453 |
| European Geography By Letter - M | 0 | - | 4.64 | 129,351 |
| European Geography By Letter - N | 0 | - | 4.44 | 100,039 |
| European Geography By Letter - R | 0 | - | 4.42 | 92,819 |
| European Geography By Letter - V | 0 | - | 4.43 | 92,448 |
| European Geography By Letter - T | 0 | - | 4.41 | 81,619 |
| Europe Map Quiz | 0 | - | 5.00 | 4,746,924 |
| European Geography By Letter - S #1 | 0 | - | 4.63 | 99,806 |
| Four Letter European Geography #2 | 0 | - | 4.57 | 20,257 |
