| States of Germany Map Quiz | 0 | - | 4.91 | 131,687 |
| States of Germany | 0 | - | 4.96 | 150,063 |
| Germany Immigration by Country | 0 | - | 4.84 | 80,018 |
| States of the German Confederation in 1848 | 0 | - | 4.89 | 31,520 |
| History of Germany | 0 | - | 4.39 | 52,614 |
| Germany Country Quiz | 0 | - | 4.82 | 156,555 |
| Modern Day Countries of the Dutch Empire on a Map | 0 | - | 4.87 | 60,376 |
| Countries of Iberia in History with a Map | 0 | - | 4.87 | 41,142 |
| Modern Day Countries of the Spanish Empire on a Map | 0 | - | 4.95 | 85,499 |
| Counties of England | 0 | - | 4.97 | 789,218 |
| Wives of King Henry VIII | 0 | - | 4.55 | 53,179 |
| Countries the UK Declared War On | 0 | - | 4.61 | 121,782 |
| Geography of the British Empire | 0 | - | 4.48 | 39,474 |
| Countries of Europe in 1815 With a Map | 0 | - | 4.99 | 148,953 |
| Countries of Europe in 1848 | 0 | - | 4.98 | 75,428 |
| Countries of Europe in 1870 with a Map | 0 | - | 4.95 | 63,421 |
| Every Country of Europe Since 1815 With a Map | 0 | - | 4.98 | 70,115 |
| Countries of Europe in 1360 with a Map | 0 | - | 4.99 | 56,021 |
| Regions of France Map Quiz | 0 | - | 4.97 | 143,131 |
| Ancient Greek Trivia | 0 | - | 4.62 | 66,779 |
| Geography of Ancient Greece | 0 | - | 4.69 | 31,771 |
| Regions of Italy | 0 | - | 4.92 | 74,730 |
| Netherlands Immigration by Country | 0 | - | 4.94 | 43,816 |
| Regions of Spain Quiz | 0 | - | 4.90 | 112,357 |
| Cantons of Switzerland | 0 | - | 4.98 | 50,197 |
| Countries and Territories of the United Kingdom | 0 | - | 4.89 | 92,913 |
| Medieval English History | 0 | - | 4.53 | 43,323 |
| Europe Map Quiz | 0 | - | 5.00 | 4,731,522 |
| French History Multiple Choice | 0 | - | 4.55 | 32,879 |
| Countries Bordering Germany | 0 | - | 4.99 | 367,065 |
| Anglo-Saxon and Viking Kings of England | 0 | - | 4.74 | 12,092 |
| Biggest Countries in Europe in 1700 | 0 | - | 4.73 | 58,148 |
| France Cities Map Quiz | 0 | - | 4.96 | 165,195 |
| Departments of France | 0 | - | 4.93 | 52,830 |
| Germany Cities Map Quiz | 0 | - | 4.86 | 125,150 |
| States of the Holy Roman Empire in 1356 | 0 | - | 4.97 | 72,474 |
| Italy Country Quiz | 0 | - | 4.82 | 122,214 |
| Regions of Italy Map Quiz | 0 | - | 4.96 | 148,391 |
| Italy Cities Map Quiz | 0 | - | 4.97 | 151,082 |
| Countries Surrounding Rome | 0 | - | 4.97 | 49,369 |
| Spain Cities Map Quiz | 0 | - | 4.87 | 95,951 |
| Regions of Spain Map Quiz | 0 | - | 4.95 | 184,645 |
| Modern-Day Countries of the British Empire in 1921 | 0 | - | 4.99 | 116,294 |
| Name the English Monarchs | 0 | - | 4.92 | 497,929 |
| Anglo-Saxon Kingdoms of England | 0 | - | 4.60 | 25,690 |
| Giant Great Britain Millennium Quiz | 0 | - | 4.78 | 20,074 |
| England or Wales? | 0 | - | 4.94 | 45,319 |
| Europe by Borders in 30 Seconds | 0 | - | 4.98 | 425,210 |
| Biggest Cities in Germany in 1910 | 0 | - | 4.41 | 23,384 |
| Countries With the Most German Speakers | 0 | - | 4.89 | 94,342 |
| Embarrassing Chapters in British History | 0 | - | 4.29 | 32,123 |
| History of Scotland | 0 | - | 4.51 | 21,004 |
| Andorra Country Quiz | 0 | - | 4.90 | 31,399 |
| Kings of France Quiz | 0 | - | 4.20 | 32,556 |
| Countries that Beat Germany | 0 | - | 4.95 | 105,381 |
| Country Quiz on a Map - Germany | 0 | - | 4.95 | 34,460 |
| German Inventions | 0 | - | 3.91 | 30,182 |
| Embarrassing Chapters in German History | 0 | - | 3.41 | 12,572 |
| The Trojan War | 0 | - | 4.83 | 39,429 |
| Letters of the Greek Alphabet | 0 | - | 4.97 | 641,958 |
| Name that Greek Letter | 0 | - | 4.94 | 321,682 |
| Greek Mythology General Knowledge #1 | 0 | - | 4.85 | 110,542 |
| Ancient Roman Trivia #1 | 0 | - | 4.85 | 84,050 |
| Roman Emperors | 0 | - | 4.95 | 118,494 |
| Malta Country Quiz | 0 | - | 4.81 | 30,828 |
| Countries That Use the Euro | 0 | - | 4.96 | 103,005 |
| Europe Cities Map Quiz | 0 | - | 4.99 | 362,312 |
| 10 Easternmost Countries in Europe | 0 | - | 4.89 | 113,569 |
| The Only European Country ... | 0 | - | 4.91 | 213,845 |
| European Countries NOT in NATO | 0 | - | 4.87 | 59,545 |
| History of Russia Quiz | 0 | - | 4.49 | 31,795 |
| 101 Figures from Greek Mythology | 0 | - | 5.00 | 124,299 |
| History of Italy | 0 | - | 4.55 | 31,817 |
| Geography of the Dutch Empire | 0 | - | 4.62 | 34,482 |
| History of The Netherlands | 0 | - | 4.46 | 17,311 |
| Countries of the Spanish Empire | 0 | - | 4.52 | 76,982 |
| Invasions of Great Britain | 0 | - | 4.51 | 59,392 |
| Former Dominions of the British Empire | 0 | - | 4.30 | 24,084 |
| British History Multiple Choice #1 | 0 | - | 4.46 | 54,957 |
| British History Multiple Choice #2 | 0 | - | 4.42 | 37,836 |
| Flags of Europe Quiz | 0 | - | 4.99 | 1,226,785 |
| Countries of Europe - One Minute Sprint | 0 | - | 4.94 | 1,319,831 |
| 10 Biggest European Countries by Area | 0 | - | 4.99 | 191,718 |
| 10 Westernmost Countries in Europe | 0 | - | 4.96 | 150,294 |
| Top 10 Languages Spoken in Europe | 0 | - | 4.96 | 216,345 |
| European Landmarks Map Quiz | 0 | - | 4.97 | 86,476 |
| Countries of Europe with an Empty Map | 0 | - | 5.00 | 307,834 |
| All First-Level Subdivisions of Europe on a Map | 0 | - | 4.98 | 167,907 |
| Countries with Territory in the Balkans | 0 | - | 4.96 | 88,271 |
| Eastern Europe Map Quiz | 0 | - | 4.91 | 127,207 |
| Slavic Countries | 0 | - | 4.96 | 110,863 |
| 15 Most Populous Countries that Speak a Germanic Language | 0 | - | 4.39 | 82,312 |
| Olympian Gods Quiz | 0 | - | 4.96 | 496,185 |
| Ancient Greek Words | 0 | - | 4.92 | 110,705 |
| Oldest Cities in the United Kingdom | 0 | - | 4.39 | 23,614 |
| History of London | 0 | - | 4.33 | 26,101 |
| "Big Five" European Soccer Champions Since 2000 | 0 | - | 4.97 | 349,942 |
| Regions of France | 0 | - | 4.78 | 119,262 |
| France Immigration by Country | 0 | - | 4.72 | 75,968 |
| Largest Islands of Greece | 0 | - | 4.59 | 47,465 |
| Roman Numeral Decoding Quiz | 0 | - | 4.94 | 433,572 |
| Two Letter Roman Numerals | 0 | - | 4.97 | 55,618 |
| Provinces of the Netherlands | 0 | - | 4.80 | 40,828 |
| 100 Greatest Britons Quiz | 0 | - | 4.41 | 48,045 |
| UK Cities Map Quiz | 0 | - | 4.95 | 462,170 |
| Foods in a Full English Breakfast | 0 | - | 4.46 | 101,965 |
| The UK for Americans - True or False | 0 | - | 4.46 | 58,389 |
| Champions League Winners | 0 | - | 4.92 | 996,391 |
| European Geography By Letter - P #1 | 0 | - | 4.81 | 96,336 |
| European Diaspora - Top 11 Countries | 0 | - | 4.90 | 95,044 |
| 10 European Countries with the Most Tourists | 0 | - | 4.98 | 136,401 |
| Three Band Flags of Europe | 0 | - | 4.98 | 191,863 |
| Pixelated Europe Map | 0 | - | 4.88 | 121,816 |
| Monarchies of Europe | 0 | - | 4.90 | 97,325 |
| European Countries with One Border | 0 | - | 4.97 | 181,635 |
| European Countries with the Fewest Borders | 0 | - | 4.97 | 178,527 |
| European Geography By Letter - B #2 | 0 | - | 4.83 | 76,272 |
| Federal Subjects of Russia | 0 | - | 4.94 | 144,012 |
| Countries That Border Russia | 0 | - | 4.98 | 458,933 |
| Countries Formerly in Yugoslavia | 0 | - | 4.95 | 124,209 |
| History of Austria | 0 | - | 4.70 | 17,748 |
| Austria Country Quiz | 0 | - | 4.57 | 59,344 |
| Belgium Country Quiz | 0 | - | 4.70 | 71,237 |
| France Country Quiz | 0 | - | 4.70 | 133,837 |
| French Inventions | 0 | - | 4.08 | 13,866 |
| Geography of the French Empire | 0 | - | 4.48 | 26,934 |
| The French Revolution | 0 | - | 4.46 | 23,785 |
| Countries Bordering France | 0 | - | 4.83 | 399,146 |
| History of Paris | 0 | - | 4.24 | 13,616 |
| History of France | 0 | - | 4.59 | 56,056 |
| German Cities with the Most Tourists | 0 | - | 4.77 | 48,294 |
| Countries Closest to Germany A-Z | 0 | - | 4.98 | 26,932 |
| Greece Country Quiz | 0 | - | 4.74 | 65,759 |
| Embarrassing Chapters in Italian History | 0 | - | 4.24 | 12,042 |
| Luxembourg Country Quiz | 0 | - | 4.77 | 33,482 |
| Monaco Country Quiz | 0 | - | 4.47 | 41,247 |
| Netherlands Country Quiz | 0 | - | 4.50 | 79,962 |
| Nordic Cities Map Quiz | 0 | - | 4.74 | 89,760 |
| The Vikings! | 0 | - | 4.46 | 28,246 |
| Sweden Immigration by Country | 0 | - | 4.55 | 55,700 |
| Portugal Country Quiz | 0 | - | 4.69 | 71,345 |
| The Portuguese Empire | 0 | - | 4.54 | 11,991 |
| Spain Country Quiz | 0 | - | 4.45 | 127,611 |
| Switzerland Country Quiz | 0 | - | 4.51 | 62,940 |
| Counties of England Map Quiz | 0 | - | 4.97 | 306,092 |
| United Kingdom A-Z | 0 | - | 4.53 | 87,226 |
| Largest Islands in the British Isles With a Map | 0 | - | 4.52 | 38,567 |
| British Geography Multiple Choice | 0 | - | 4.49 | 43,173 |
| 10 Closest Megacities to London | 0 | - | 4.90 | 17,410 |
| Counties of Wales | 0 | - | 4.63 | 38,903 |
| Countries of the Mongol Empire on a Map | 0 | - | 4.99 | 105,906 |
| Top 10 Coldest European Countries | 0 | - | 4.94 | 192,250 |
| Top 10 Hottest European Countries | 0 | - | 4.89 | 126,122 |
| Category Elimination - European Geography #1 | 0 | - | 4.98 | 230,554 |
| European Map without 10 Random Countries | 0 | - | 4.97 | 274,225 |
| Category Elimination - European Geography #2 | 0 | - | 4.99 | 165,179 |
| Name a Valid European Country #1 | 0 | - | 4.99 | 256,816 |
| Name a Valid European Country #2 | 0 | - | 4.94 | 113,257 |
| Russia Country Quiz | 0 | - | 4.85 | 113,640 |
| Croatia Country Quiz | 0 | - | 4.83 | 42,854 |
| Bosnia and Herzegovina Country Quiz | 0 | - | 4.86 | 35,038 |
| Most Popular Baby Girls Names in Germany | 0 | - | 4.51 | 38,626 |
| German History A-Z | 0 | - | 4.49 | 24,221 |
| Figures from Greek Mythology | 0 | - | 4.91 | 184,963 |
| History of Ireland | 0 | - | 4.39 | 30,830 |
| Countries Italy Declared War On | 0 | - | 4.75 | 42,954 |
| Byzantine History | 0 | - | 4.91 | 28,621 |
| Canary Islands | 0 | - | 4.61 | 17,403 |
| Biggest Spanish Empire Countries | 0 | - | 4.91 | 114,887 |
| Switzerland Immigration by Country | 0 | - | 4.70 | 29,153 |
| British Spellings | 0 | - | 4.07 | 99,205 |
| British Groups of Things | 0 | - | 4.25 | 82,671 |
| British Acronyms | 0 | - | 4.39 | 45,619 |
| UK Immigration by Country | 0 | - | 4.94 | 139,647 |
| United Kingdom Decoder | 0 | - | 4.29 | 39,947 |
| United Kingdom Country Quiz | 0 | - | 4.96 | 138,152 |
| Biggest Immigrant Groups by Decade in the UK | 0 | - | 4.62 | 24,470 |
| Geography of Scotland | 0 | - | 4.63 | 21,479 |
| All UEFA Champions League Teams Ever | 0 | - | 4.85 | 128,501 |
| U.S. Presidents Quiz | 0 | - | 5.00 | 3,654,764 |
| Deadliest U.S. Wars | 0 | - | 4.89 | 189,263 |
| Countries That Touch the Adriatic Sea | 0 | - | 4.96 | 70,793 |
| European Countries with the Fewest Overnight Visitors | 0 | - | 4.78 | 41,599 |
| Top 10 European Countries by Coastline | 0 | - | 4.89 | 137,855 |
| Top 20 Football Clubs in Europe | 0 | - | 4.48 | 113,054 |
| 100 Longest Rivers in Europe - with a Map | 0 | - | 4.94 | 64,844 |
| Category Elimination - European Countries #1 | 0 | - | 4.89 | 88,973 |
| The Only Remaining European Country . . . | 0 | - | 4.41 | 63,785 |
| Countries that Border Poland | 0 | - | 4.99 | 171,361 |
| Non-Bordering Countries Closest to Russia | 0 | - | 4.91 | 82,382 |
| Countries that Beat Russia | 0 | - | 4.84 | 81,902 |
| Countries With the Most Russian Speakers | 0 | - | 4.97 | 98,494 |
| Countries that Border Hungary | 0 | - | 4.98 | 103,701 |
| North Macedonia Country Quiz | 0 | - | 4.81 | 27,618 |
| Moldova Country Quiz | 0 | - | 4.81 | 30,543 |
| Countries Bordering Serbia | 0 | - | 4.96 | 91,755 |
| French Geography Quiz #1 | 0 | - | 4.89 | 34,514 |
| Countries Bordering Austria | 0 | - | 4.97 | 117,781 |
| 20 Questions About France | 0 | - | 4.11 | 32,338 |
| Countries that Visit France the Most | 0 | - | 4.85 | 45,537 |
