| States of Germany Map Quiz | 0 | - | 4.91 | 131,648 |
| States of Germany | 0 | - | 4.96 | 149,956 |
| Germany Immigration by Country | 0 | - | 4.84 | 79,990 |
| States of the German Confederation in 1848 | 0 | - | 4.89 | 31,510 |
| History of Germany | 0 | - | 4.39 | 52,609 |
| Germany Country Quiz | 0 | - | 4.82 | 156,485 |
| Modern Day Countries of the Dutch Empire on a Map | 0 | - | 4.87 | 60,339 |
| Countries of Iberia in History with a Map | 0 | - | 4.87 | 41,117 |
| Modern Day Countries of the Spanish Empire on a Map | 0 | - | 4.95 | 85,461 |
| Counties of England | 0 | - | 4.97 | 788,914 |
| Wives of King Henry VIII | 0 | - | 4.55 | 53,166 |
| Countries the UK Declared War On | 0 | - | 4.61 | 121,749 |
| Geography of the British Empire | 0 | - | 4.48 | 39,467 |
| Countries of Europe in 1815 With a Map | 0 | - | 4.99 | 148,890 |
| Countries of Europe in 1848 | 0 | - | 4.98 | 75,378 |
| Countries of Europe in 1870 with a Map | 0 | - | 4.95 | 63,339 |
| Every Country of Europe Since 1815 With a Map | 0 | - | 4.98 | 70,066 |
| Countries of Europe in 1360 with a Map | 0 | - | 4.99 | 55,979 |
| Regions of France Map Quiz | 0 | - | 4.97 | 143,082 |
| Ancient Greek Trivia | 0 | - | 4.62 | 66,761 |
| Geography of Ancient Greece | 0 | - | 4.69 | 31,765 |
| Regions of Italy | 0 | - | 4.92 | 74,668 |
| Netherlands Immigration by Country | 0 | - | 4.94 | 43,785 |
| Regions of Spain Quiz | 0 | - | 4.90 | 112,272 |
| Cantons of Switzerland | 0 | - | 4.98 | 50,100 |
| Countries and Territories of the United Kingdom | 0 | - | 4.89 | 92,881 |
| Medieval English History | 0 | - | 4.53 | 43,309 |
| Europe Map Quiz | 0 | - | 5.00 | 4,730,029 |
| French History Multiple Choice | 0 | - | 4.55 | 32,867 |
| Countries Bordering Germany | 0 | - | 4.99 | 366,936 |
| Anglo-Saxon and Viking Kings of England | 0 | - | 4.74 | 12,088 |
| Biggest Countries in Europe in 1700 | 0 | - | 4.73 | 58,126 |
| France Cities Map Quiz | 0 | - | 4.96 | 165,139 |
| Departments of France | 0 | - | 4.93 | 52,750 |
| Germany Cities Map Quiz | 0 | - | 4.86 | 125,110 |
| States of the Holy Roman Empire in 1356 | 0 | - | 4.97 | 72,416 |
| Italy Country Quiz | 0 | - | 4.82 | 122,151 |
| Regions of Italy Map Quiz | 0 | - | 4.96 | 148,323 |
| Italy Cities Map Quiz | 0 | - | 4.97 | 151,032 |
| Countries Surrounding Rome | 0 | - | 4.97 | 49,355 |
| Spain Cities Map Quiz | 0 | - | 4.87 | 95,930 |
| Regions of Spain Map Quiz | 0 | - | 4.95 | 184,603 |
| Modern-Day Countries of the British Empire in 1921 | 0 | - | 4.99 | 116,205 |
| Name the English Monarchs | 0 | - | 4.92 | 497,745 |
| Anglo-Saxon Kingdoms of England | 0 | - | 4.60 | 25,685 |
| Giant Great Britain Millennium Quiz | 0 | - | 4.78 | 20,072 |
| England or Wales? | 0 | - | 4.94 | 45,306 |
| Europe by Borders in 30 Seconds | 0 | - | 4.98 | 425,070 |
| Biggest Cities in Germany in 1910 | 0 | - | 4.41 | 23,381 |
| Countries With the Most German Speakers | 0 | - | 4.89 | 94,227 |
| Embarrassing Chapters in British History | 0 | - | 4.29 | 32,107 |
| History of Scotland | 0 | - | 4.51 | 20,997 |
| Andorra Country Quiz | 0 | - | 4.90 | 31,374 |
| Kings of France Quiz | 0 | - | 4.20 | 32,548 |
| Countries that Beat Germany | 0 | - | 4.95 | 105,331 |
| Country Quiz on a Map - Germany | 0 | - | 4.95 | 34,438 |
| German Inventions | 0 | - | 3.91 | 30,179 |
| Embarrassing Chapters in German History | 0 | - | 3.41 | 12,566 |
| The Trojan War | 0 | - | 4.83 | 39,419 |
| Letters of the Greek Alphabet | 0 | - | 4.97 | 641,689 |
| Name that Greek Letter | 0 | - | 4.94 | 321,586 |
| Greek Mythology General Knowledge #1 | 0 | - | 4.85 | 110,493 |
| Ancient Roman Trivia #1 | 0 | - | 4.85 | 84,027 |
| Roman Emperors | 0 | - | 4.95 | 118,415 |
| Malta Country Quiz | 0 | - | 4.81 | 30,820 |
| Countries That Use the Euro | 0 | - | 4.96 | 102,901 |
| Europe Cities Map Quiz | 0 | - | 4.99 | 362,226 |
| 10 Easternmost Countries in Europe | 0 | - | 4.89 | 113,474 |
| The Only European Country ... | 0 | - | 4.91 | 213,719 |
| European Countries NOT in NATO | 0 | - | 4.87 | 59,457 |
| History of Russia Quiz | 0 | - | 4.49 | 31,784 |
| 101 Figures from Greek Mythology | 0 | - | 5.00 | 124,204 |
| History of Italy | 0 | - | 4.55 | 31,809 |
| Geography of the Dutch Empire | 0 | - | 4.62 | 34,476 |
| History of The Netherlands | 0 | - | 4.46 | 17,305 |
| Countries of the Spanish Empire | 0 | - | 4.52 | 76,974 |
| Invasions of Great Britain | 0 | - | 4.51 | 59,377 |
| Former Dominions of the British Empire | 0 | - | 4.30 | 24,078 |
| British History Multiple Choice #1 | 0 | - | 4.46 | 54,948 |
| British History Multiple Choice #2 | 0 | - | 4.42 | 37,827 |
| Flags of Europe Quiz | 0 | - | 4.99 | 1,225,846 |
| Countries of Europe - One Minute Sprint | 0 | - | 4.94 | 1,319,422 |
| 10 Biggest European Countries by Area | 0 | - | 4.99 | 191,672 |
| 10 Westernmost Countries in Europe | 0 | - | 4.96 | 150,256 |
| Top 10 Languages Spoken in Europe | 0 | - | 4.96 | 216,233 |
| European Landmarks Map Quiz | 0 | - | 4.97 | 86,447 |
| Countries of Europe with an Empty Map | 0 | - | 5.00 | 307,743 |
| All First-Level Subdivisions of Europe on a Map | 0 | - | 4.98 | 167,764 |
| Countries with Territory in the Balkans | 0 | - | 4.96 | 88,218 |
| Eastern Europe Map Quiz | 0 | - | 4.91 | 127,157 |
| Slavic Countries | 0 | - | 4.96 | 110,820 |
| 15 Most Populous Countries that Speak a Germanic Language | 0 | - | 4.39 | 82,302 |
| Olympian Gods Quiz | 0 | - | 4.96 | 495,766 |
| Ancient Greek Words | 0 | - | 4.92 | 110,639 |
| Oldest Cities in the United Kingdom | 0 | - | 4.39 | 23,607 |
| History of London | 0 | - | 4.33 | 26,096 |
| "Big Five" European Soccer Champions Since 2000 | 0 | - | 4.97 | 349,668 |
| Regions of France | 0 | - | 4.78 | 119,174 |
| France Immigration by Country | 0 | - | 4.72 | 75,943 |
| Largest Islands of Greece | 0 | - | 4.59 | 47,435 |
| Roman Numeral Decoding Quiz | 0 | - | 4.94 | 433,407 |
| Two Letter Roman Numerals | 0 | - | 4.97 | 55,599 |
| Provinces of the Netherlands | 0 | - | 4.80 | 40,762 |
| 100 Greatest Britons Quiz | 0 | - | 4.41 | 48,037 |
| UK Cities Map Quiz | 0 | - | 4.95 | 462,057 |
| Foods in a Full English Breakfast | 0 | - | 4.46 | 101,917 |
| The UK for Americans - True or False | 0 | - | 4.46 | 58,381 |
| Champions League Winners | 0 | - | 4.92 | 995,925 |
| European Geography By Letter - P #1 | 0 | - | 4.81 | 96,304 |
| European Diaspora - Top 11 Countries | 0 | - | 4.90 | 95,018 |
| 10 European Countries with the Most Tourists | 0 | - | 4.98 | 136,323 |
| Three Band Flags of Europe | 0 | - | 4.98 | 191,802 |
| Pixelated Europe Map | 0 | - | 4.88 | 121,760 |
| Monarchies of Europe | 0 | - | 4.90 | 97,282 |
| European Countries with One Border | 0 | - | 4.97 | 181,576 |
| European Countries with the Fewest Borders | 0 | - | 4.97 | 178,484 |
| European Geography By Letter - B #2 | 0 | - | 4.83 | 76,188 |
| Federal Subjects of Russia | 0 | - | 4.94 | 143,894 |
| Countries That Border Russia | 0 | - | 4.98 | 458,806 |
| Countries Formerly in Yugoslavia | 0 | - | 4.95 | 124,157 |
| History of Austria | 0 | - | 4.70 | 17,743 |
| Austria Country Quiz | 0 | - | 4.57 | 59,322 |
| Belgium Country Quiz | 0 | - | 4.70 | 71,209 |
| France Country Quiz | 0 | - | 4.70 | 133,792 |
| French Inventions | 0 | - | 4.08 | 13,863 |
| Geography of the French Empire | 0 | - | 4.48 | 26,923 |
| The French Revolution | 0 | - | 4.46 | 23,773 |
| Countries Bordering France | 0 | - | 4.83 | 398,590 |
| History of Paris | 0 | - | 4.24 | 13,612 |
| History of France | 0 | - | 4.59 | 55,980 |
| German Cities with the Most Tourists | 0 | - | 4.77 | 48,231 |
| Countries Closest to Germany A-Z | 0 | - | 4.98 | 26,922 |
| Greece Country Quiz | 0 | - | 4.74 | 65,736 |
| Embarrassing Chapters in Italian History | 0 | - | 4.24 | 12,035 |
| Luxembourg Country Quiz | 0 | - | 4.77 | 33,470 |
| Monaco Country Quiz | 0 | - | 4.47 | 41,228 |
| Netherlands Country Quiz | 0 | - | 4.50 | 79,937 |
| Nordic Cities Map Quiz | 0 | - | 4.74 | 89,741 |
| The Vikings! | 0 | - | 4.45 | 28,243 |
| Sweden Immigration by Country | 0 | - | 4.55 | 55,681 |
| Portugal Country Quiz | 0 | - | 4.69 | 71,320 |
| The Portuguese Empire | 0 | - | 4.54 | 11,987 |
| Spain Country Quiz | 0 | - | 4.45 | 127,563 |
| Switzerland Country Quiz | 0 | - | 4.51 | 62,923 |
| Counties of England Map Quiz | 0 | - | 4.97 | 306,031 |
| United Kingdom A-Z | 0 | - | 4.53 | 87,198 |
| Largest Islands in the British Isles With a Map | 0 | - | 4.52 | 38,559 |
| British Geography Multiple Choice | 0 | - | 4.49 | 43,166 |
| 10 Closest Megacities to London | 0 | - | 4.90 | 17,400 |
| Counties of Wales | 0 | - | 4.63 | 38,884 |
| Countries of the Mongol Empire on a Map | 0 | - | 4.99 | 105,830 |
| Top 10 Coldest European Countries | 0 | - | 4.94 | 192,211 |
| Top 10 Hottest European Countries | 0 | - | 4.89 | 126,089 |
| Category Elimination - European Geography #1 | 0 | - | 4.98 | 230,427 |
| European Map without 10 Random Countries | 0 | - | 4.97 | 274,136 |
| Category Elimination - European Geography #2 | 0 | - | 4.99 | 165,093 |
| Name a Valid European Country #1 | 0 | - | 4.99 | 256,612 |
| Name a Valid European Country #2 | 0 | - | 4.94 | 113,175 |
| Russia Country Quiz | 0 | - | 4.85 | 113,610 |
| Croatia Country Quiz | 0 | - | 4.83 | 42,827 |
| Bosnia and Herzegovina Country Quiz | 0 | - | 4.86 | 35,021 |
| Most Popular Baby Girls Names in Germany | 0 | - | 4.51 | 38,621 |
| German History A-Z | 0 | - | 4.49 | 24,209 |
| Figures from Greek Mythology | 0 | - | 4.91 | 184,858 |
| History of Ireland | 0 | - | 4.39 | 30,814 |
| Countries Italy Declared War On | 0 | - | 4.75 | 42,932 |
| Byzantine History | 0 | - | 4.91 | 28,609 |
| Canary Islands | 0 | - | 4.61 | 17,397 |
| Biggest Spanish Empire Countries | 0 | - | 4.91 | 114,736 |
| Switzerland Immigration by Country | 0 | - | 4.70 | 29,130 |
| British Spellings | 0 | - | 4.07 | 99,198 |
| British Groups of Things | 0 | - | 4.25 | 82,667 |
| British Acronyms | 0 | - | 4.39 | 45,614 |
| UK Immigration by Country | 0 | - | 4.94 | 139,560 |
| United Kingdom Decoder | 0 | - | 4.29 | 39,943 |
| United Kingdom Country Quiz | 0 | - | 4.96 | 138,081 |
| Biggest Immigrant Groups by Decade in the UK | 0 | - | 4.62 | 24,430 |
| Geography of Scotland | 0 | - | 4.63 | 21,474 |
| All UEFA Champions League Teams Ever | 0 | - | 4.84 | 128,418 |
| U.S. Presidents Quiz | 0 | - | 5.00 | 3,652,623 |
| Deadliest U.S. Wars | 0 | - | 4.89 | 189,215 |
| Countries That Touch the Adriatic Sea | 0 | - | 4.96 | 70,780 |
| European Countries with the Fewest Overnight Visitors | 0 | - | 4.78 | 41,597 |
| Top 10 European Countries by Coastline | 0 | - | 4.89 | 137,824 |
| Top 20 Football Clubs in Europe | 0 | - | 4.48 | 112,956 |
| 100 Longest Rivers in Europe - with a Map | 0 | - | 4.94 | 64,775 |
| Category Elimination - European Countries #1 | 0 | - | 4.89 | 88,935 |
| The Only Remaining European Country . . . | 0 | - | 4.41 | 63,762 |
| Countries that Border Poland | 0 | - | 4.99 | 171,304 |
| Non-Bordering Countries Closest to Russia | 0 | - | 4.91 | 82,359 |
| Countries that Beat Russia | 0 | - | 4.84 | 81,859 |
| Countries With the Most Russian Speakers | 0 | - | 4.97 | 98,358 |
| Countries that Border Hungary | 0 | - | 4.98 | 103,671 |
| North Macedonia Country Quiz | 0 | - | 4.81 | 27,602 |
| Moldova Country Quiz | 0 | - | 4.81 | 30,530 |
| Countries Bordering Serbia | 0 | - | 4.96 | 91,714 |
| French Geography Quiz #1 | 0 | - | 4.89 | 34,507 |
| Countries Bordering Austria | 0 | - | 4.97 | 117,749 |
| 20 Questions About France | 0 | - | 4.11 | 32,334 |
| Countries that Visit France the Most | 0 | - | 4.85 | 45,507 |
