| States of Germany | 0 | - | 4.95 | 153,328 |
| Germany Immigration by Country | 0 | - | 4.85 | 81,311 |
| German Groups of Things | 0 | - | 4.46 | 38,530 |
| European Countries by First 2 Letters | 0 | - | 4.95 | 530,763 |
| Germany Multiple Choice | 0 | - | 4.84 | 54,490 |
| States of the German Confederation in 1848 | 0 | - | 4.90 | 32,221 |
| Country Quiz on a Map - Germany | 0 | - | 4.95 | 35,222 |
| Save Europeans by Guessing Countries | 0 | - | 4.86 | 214,795 |
| Word Chain - France | 0 | - | 4.38 | 42,852 |
| Regions of Italy | 0 | - | 4.92 | 76,311 |
| Netherlands Immigration by Country | 0 | - | 4.93 | 52,464 |
| Regions of Spain Quiz | 0 | - | 4.90 | 114,479 |
| Cantons of Switzerland | 0 | - | 4.98 | 51,439 |
| Category Elimination - European Geography #1 | 0 | - | 4.98 | 234,050 |
| European Map without 10 Random Countries | 0 | - | 4.97 | 277,480 |
| Category Elimination - European Geography #2 | 0 | - | 4.99 | 167,747 |
| Departments of France | 0 | - | 4.93 | 54,527 |
| Famous Germans | 0 | - | 4.50 | 55,545 |
| Germany True or False? | 0 | - | 4.61 | 48,902 |
| Countries Surrounding Rome | 0 | - | 4.97 | 49,621 |
| Foods in a Full English Breakfast | 0 | - | 4.46 | 103,468 |
| England or Wales? | 0 | - | 4.94 | 45,814 |
| Count to 10 in Europe: Pro | 0 | - | 4.86 | 69,356 |
| Official European Union Languages | 0 | - | 4.97 | 238,981 |
| European Countries in their Native Language | 0 | - | 4.99 | 158,178 |
| Europe by Borders in 30 Seconds | 0 | - | 4.98 | 429,245 |
| French Geography Quiz #1 | 0 | - | 4.89 | 34,881 |
| Word Chain - Italy | 0 | - | 4.07 | 23,191 |
| Word Chain - United Kingdom | 0 | - | 4.05 | 29,365 |
| Europe Geography Decoder | 0 | - | 4.86 | 70,126 |
| Country Quiz on a Map - France | 0 | - | 4.98 | 47,388 |
| Italian Foods | 0 | - | 4.30 | 72,964 |
| Countries that Beat Switzerland | 0 | - | 4.88 | 41,922 |
| British Groups of Things | 0 | - | 4.25 | 82,917 |
| United Kingdom Decoder | 0 | - | 4.29 | 40,059 |
| Add A Letter - Make a European City | 0 | - | 4.90 | 23,436 |
| Celtic Nations | 0 | - | 4.69 | 47,003 |
| Europe Geography Quiz #1 | 0 | - | 4.55 | 71,367 |
| Europe Geography Quiz #2 | 0 | - | 4.57 | 72,029 |
| Countries of Europe - One Minute Sprint | 0 | - | 4.94 | 1,331,221 |
| Europe Geography Quiz #4 | 0 | - | 4.57 | 70,324 |
| Europe Geography Quiz #5 | 0 | - | 4.55 | 61,307 |
| Most Guessed Cities in Europe - Not Capitals | 0 | - | 4.82 | 87,598 |
| Countries of Europe with an Empty Map | 0 | - | 5.00 | 311,545 |
| All First-Level Subdivisions of Europe on a Map | 0 | - | 4.98 | 173,411 |
| Regions of France | 0 | - | 4.70 | 121,308 |
| France Immigration by Country | 0 | - | 4.70 | 76,700 |
| Capitals of German States | 0 | - | 4.74 | 28,992 |
| Chancellors of Germany, 1949–present | 0 | - | 4.60 | 23,409 |
| History of Germany | 0 | - | 4.39 | 52,906 |
| Largest Islands of Greece | 0 | - | 4.59 | 48,157 |
| Famous Italians by Clue | 0 | - | 4.45 | 89,852 |
| Provinces of the Netherlands | 0 | - | 4.80 | 41,514 |
| Most Common First Names in Spain | 0 | - | 4.27 | 45,665 |
| 100 Greatest Britons Quiz | 0 | - | 4.41 | 48,351 |
| Most Common Surnames in the UK | 0 | - | 4.22 | 69,784 |
| Fictional Characters from Great Britain | 0 | - | 4.24 | 42,052 |
| Counties of England | 0 | - | 4.97 | 799,278 |
| The UK for Americans - True or False | 0 | - | 4.43 | 58,703 |
| "Big Five" European Soccer Champions Since 2000 | 0 | - | 4.97 | 358,403 |
| Capital Cities Chain | 0 | - | 4.84 | 82,991 |
| American Countries with the Shortest Names | 0 | - | 4.96 | 121,306 |
| European Geography By Letter - P #1 | 0 | - | 4.81 | 97,988 |
| Catholic Countries in Europe | 0 | - | 4.83 | 95,425 |
| European Geography By Letter - B #2 | 0 | - | 4.86 | 87,134 |
| Category Elimination - European Geography #3 | 0 | - | 4.86 | 81,371 |
| Federal Subjects of Russia | 0 | - | 4.95 | 148,139 |
| Regions of France Map Quiz | 0 | - | 4.97 | 144,903 |
| States of Germany Map Quiz | 0 | - | 4.92 | 133,260 |
| UK Cities Map Quiz | 0 | - | 4.96 | 465,285 |
| Countries and Territories of the United Kingdom | 0 | - | 4.90 | 94,190 |
| Counties of England Map Quiz | 0 | - | 4.97 | 308,277 |
| Name a Valid English City | 0 | - | 4.19 | 16,757 |
| Champions League Winners | 0 | - | 4.92 | 1,010,294 |
| Asian Countries with the Shortest Names | 0 | - | 4.97 | 135,606 |
| Africa Geography Quiz #1 | 0 | - | 4.93 | 49,408 |
| Word Chain - Australia | 0 | - | 4.38 | 38,174 |
| Biggest Countries in Europe in 1700 | 0 | - | 4.73 | 58,598 |
| Sweden Immigration by Country | 0 | - | 4.55 | 56,223 |
| United Kingdom A-Z | 0 | - | 4.52 | 88,179 |
| 10 Closest Megacities to London | 0 | - | 4.90 | 17,762 |
| Most Common U.S. Last Names - Extreme | 0 | - | 4.94 | 174,913 |
| Europe Geography Quiz #3 | 0 | - | 4.35 | 63,758 |
| Name a Valid European Country #1 | 0 | - | 4.99 | 262,469 |
| Name a Valid European Country #2 | 0 | - | 4.94 | 115,114 |
| Andorra Country Quiz | 0 | - | 4.91 | 31,793 |
| Famous French People | 0 | - | 4.07 | 35,877 |
| France Cities Map Quiz | 0 | - | 4.96 | 167,215 |
| Germany Country Quiz | 0 | - | 4.83 | 158,235 |
| Germany Cities Map Quiz | 0 | - | 4.87 | 126,669 |
| Ancient Greek Trivia | 0 | - | 4.62 | 67,088 |
| Geography of Ancient Greece | 0 | - | 4.69 | 31,952 |
| Regions of Italy Map Quiz | 0 | - | 4.96 | 149,726 |
| Italy Cities Map Quiz | 0 | - | 4.97 | 152,647 |
| The Mafia Quiz | 0 | - | 4.46 | 23,379 |
| History of The Netherlands | 0 | - | 4.46 | 17,491 |
| Spain Cities Map Quiz | 0 | - | 4.87 | 97,140 |
| Regions of Spain Map Quiz | 0 | - | 4.95 | 186,275 |
| Canary Islands | 0 | - | 4.62 | 17,497 |
| Biggest Spanish Empire Countries | 0 | - | 4.91 | 116,302 |
| Switzerland Immigration by Country | 0 | - | 4.69 | 29,840 |
| British Spellings | 0 | - | 4.06 | 99,516 |
| British to American Food Translation | 0 | - | 3.38 | 51,987 |
| British Acronyms | 0 | - | 4.40 | 45,858 |
| UK Immigration by Country | 0 | - | 4.94 | 141,198 |
| United Kingdom Country Quiz | 0 | - | 4.96 | 140,257 |
| Modern-Day Countries of the British Empire in 1921 | 0 | - | 4.99 | 118,051 |
| English Monarchs in Order by First Letter | 0 | - | 4.38 | 31,968 |
| Geography of Scotland | 0 | - | 4.63 | 21,669 |
| All UEFA Champions League Teams Ever | 0 | - | 4.85 | 131,098 |
| Category Elimination - Asian Geography #1 | 0 | - | 4.86 | 110,385 |
| Category Elimination - Asian Geography #2 | 0 | - | 4.94 | 97,132 |
| Name a Valid Asian Country | 0 | - | 4.98 | 121,271 |
| Category Elimination - African Geography #1 | 0 | - | 4.90 | 92,638 |
| Name a Valid African Country | 0 | - | 4.98 | 154,413 |
| Pre-Euro Currencies | 0 | - | 4.44 | 52,657 |
| European Countries with the Fewest Overnight Visitors | 0 | - | 4.80 | 41,676 |
| Word Scramble - European Countries | 0 | - | 4.73 | 141,924 |
| Top 20 Football Clubs in Europe | 0 | - | 4.48 | 115,712 |
| 100 Longest Rivers in Europe - with a Map | 0 | - | 4.94 | 65,661 |
| Category Elimination - European Countries #1 | 0 | - | 4.90 | 90,433 |
| Random Point on Land to European Country | 0 | - | 4.94 | 77,492 |
| Slavic Languages | 0 | - | 4.68 | 54,484 |
| Famous Swiss and Austrian People | 0 | - | 4.45 | 14,647 |
| Famous Dutch and Belgian People | 0 | - | 4.56 | 18,093 |
| France A-Z | 0 | - | 4.16 | 38,275 |
| French History Multiple Choice | 0 | - | 4.55 | 33,135 |
| Biggest Cities in Germany in 1910 | 0 | - | 4.40 | 23,512 |
| Geography of Germany | 0 | - | 4.35 | 17,212 |
| Letters of the Greek Alphabet | 0 | - | 4.97 | 649,168 |
| Name that Greek Letter | 0 | - | 4.93 | 324,233 |
| Capitals of Italian Regions | 0 | - | 4.62 | 36,675 |
| Modern Day Countries of the Dutch Empire on a Map | 0 | - | 4.86 | 61,325 |
| Spanish Immigration by Country | 0 | - | 4.63 | 55,517 |
| Countries of Iberia in History with a Map | 0 | - | 4.88 | 42,085 |
| Modern Day Countries of the Spanish Empire on a Map | 0 | - | 4.95 | 86,541 |
| Switzerland A-Z | 0 | - | 4.45 | 25,695 |
| Wonderwall Lyrics | 0 | - | 4.25 | 73,887 |
| Malta Country Quiz | 0 | - | 4.81 | 31,125 |
| Topological Map of Asia Quiz | 0 | - | 4.81 | 20,243 |
| Countries that Beat the United States | 0 | - | 4.93 | 167,874 |
| Countries that Beat Canada | 0 | - | 4.91 | 98,548 |
| Top European Languages on a Map | 0 | - | 4.77 | 132,386 |
| History of Russia Quiz | 0 | - | 4.47 | 31,957 |
| Word Chain - Russia | 0 | - | 4.33 | 15,773 |
| Russia Multiple Choice | 0 | - | 4.58 | 40,783 |
| Countries that Beat Russia | 0 | - | 4.81 | 83,100 |
| French Geography Quiz #2 | 0 | - | 4.62 | 23,270 |
| Movies Set in France | 0 | - | 4.26 | 13,135 |
| French Inventions | 0 | - | 4.10 | 13,910 |
| French Foods | 0 | - | 4.00 | 27,730 |
| History of Paris | 0 | - | 4.24 | 13,663 |
| The Trojan War | 0 | - | 4.83 | 39,811 |
| Greek Mythology General Knowledge #1 | 0 | - | 4.85 | 112,302 |
| 101 Figures from Greek Mythology | 0 | - | 4.99 | 126,577 |
| History of Italy | 0 | - | 4.55 | 32,062 |
| Italy Multiple Choice | 0 | - | 4.74 | 103,989 |
| Embarrassing Chapters in Italian History | 0 | - | 4.24 | 12,131 |
| Ancient Roman Trivia #1 | 0 | - | 4.85 | 84,666 |
| Roman Emperors | 0 | - | 4.95 | 120,445 |
| Geography of the Dutch Empire | 0 | - | 4.62 | 34,727 |
| Famous Nordic People | 0 | - | 4.34 | 20,179 |
| Most Common Last Names in Sweden | 0 | - | 4.49 | 15,436 |
| Countries that Beat Iceland | 0 | - | 4.81 | 43,006 |
| Countries that Beat Portugal | 0 | - | 4.86 | 59,541 |
| Famous Spaniards Quiz | 0 | - | 4.24 | 11,624 |
| Countries of the Spanish Empire | 0 | - | 4.52 | 77,310 |
| Geography of Spain | 0 | - | 4.59 | 22,111 |
| The British Royal Family - Modern Times | 0 | - | 4.16 | 21,547 |
| Members of the British Royal Family | 0 | - | 4.10 | 114,366 |
| People on Money - England | 0 | - | 4.29 | 16,625 |
| Asian Countries by First 2 Letters | 0 | - | 4.91 | 279,760 |
| Countries that Beat Indonesia | 0 | - | 4.86 | 56,123 |
| African Countries by First 2 Letters | 0 | - | 4.96 | 268,655 |
| Random Sequential Oceanic Countries on a Map | 0 | - | 4.97 | 27,275 |
| European Geography By Letter - A | 0 | - | 4.52 | 147,027 |
| European Geography By Letter - B #1 | 0 | - | 4.69 | 120,423 |
| European Geography By Letter - C | 0 | - | 4.46 | 114,823 |
| European Geography By Letter - D | 0 | - | 4.50 | 109,377 |
| European Geography By Letter - L | 0 | - | 4.52 | 114,042 |
| European Geography By Letter - M | 0 | - | 4.67 | 131,376 |
| European Geography By Letter - N | 0 | - | 4.44 | 101,234 |
| European Geography By Letter - R | 0 | - | 4.42 | 94,046 |
| European Geography By Letter - V | 0 | - | 4.42 | 93,310 |
| European Geography By Letter - T | 0 | - | 4.41 | 82,877 |
| Europe Map Quiz | 0 | - | 5.00 | 4,772,712 |
| European Geography By Letter - S #1 | 0 | - | 4.63 | 100,915 |
| Four Letter European Geography #2 | 0 | - | 4.57 | 20,561 |
| Capitals of French Regions | 0 | - | 4.45 | 16,117 |
| Kings of France Quiz | 0 | - | 4.20 | 32,829 |
| German Loan Words | 0 | - | 4.28 | 139,241 |
| Olympian Gods Quiz | 0 | - | 4.96 | 502,043 |
| Ancient Greek Words | 0 | - | 4.93 | 111,949 |
| Robin Hood Quiz | 0 | - | 4.00 | 8,468 |
| Things British People Know that Americans Don't | 0 | - | 4.25 | 51,497 |
| Name Every Beatles Song | 0 | - | 4.97 | 237,170 |
| Bohemian Rhapsody Lyrics | 0 | - | 4.98 | 292,145 |
| Famous Scottish People | 0 | - | 4.22 | 18,415 |
| Asia Geography Quiz #1 | 0 | - | 4.70 | 53,562 |
| Asia Geography Quiz #2 | 0 | - | 4.56 | 48,618 |
