| States of the German Confederation in 1848 | 0 | - | 4.90 | 32,509 |
| States of Germany Map Quiz | 0 | - | 4.92 | 133,970 |
| States of Germany | 0 | - | 4.95 | 154,912 |
| Germany Immigration by Country | 0 | - | 4.86 | 81,799 |
| History of Germany | 0 | - | 4.39 | 52,998 |
| Germany Country Quiz | 0 | - | 4.82 | 159,038 |
| Modern Day Countries of the Dutch Empire on a Map | 0 | - | 4.87 | 61,791 |
| Countries of Iberia in History with a Map | 0 | - | 4.88 | 42,499 |
| Modern Day Countries of the Spanish Empire on a Map | 0 | - | 4.95 | 87,004 |
| Counties of England | 0 | - | 4.97 | 804,146 |
| Wives of King Henry VIII | 0 | - | 4.55 | 53,488 |
| Countries the UK Declared War On | 0 | - | 4.55 | 123,363 |
| Geography of the British Empire | 0 | - | 4.48 | 39,870 |
| Countries of Europe in 1815 With a Map | 0 | - | 4.99 | 151,542 |
| Countries of Europe in 1848 | 0 | - | 4.98 | 86,001 |
| Countries of Europe in 1870 with a Map | 0 | - | 4.95 | 65,985 |
| Every Country of Europe Since 1815 With a Map | 0 | - | 4.97 | 72,003 |
| Countries of Europe in 1360 with a Map | 0 | - | 4.99 | 57,717 |
| Regions of France Map Quiz | 0 | - | 4.97 | 145,801 |
| Ancient Greek Trivia | 0 | - | 4.62 | 67,278 |
| Geography of Ancient Greece | 0 | - | 4.69 | 32,069 |
| Regions of Italy | 0 | - | 4.92 | 77,249 |
| Netherlands Immigration by Country | 0 | - | 4.93 | 52,909 |
| Regions of Spain Quiz | 0 | - | 4.90 | 115,567 |
| Cantons of Switzerland | 0 | - | 4.98 | 51,893 |
| Countries and Territories of the United Kingdom | 0 | - | 4.90 | 94,620 |
| Medieval English History | 0 | - | 4.53 | 43,688 |
| Europe Map Quiz | 0 | - | 5.00 | 4,792,932 |
| French History Multiple Choice | 0 | - | 4.55 | 33,276 |
| Countries Bordering Germany | 0 | - | 4.99 | 372,216 |
| Biggest Countries in Europe in 1700 | 0 | - | 4.73 | 58,815 |
| Andorra Country Quiz | 0 | - | 4.91 | 31,985 |
| France Cities Map Quiz | 0 | - | 4.96 | 167,986 |
| Departments of France | 0 | - | 4.93 | 55,384 |
| Germany Cities Map Quiz | 0 | - | 4.87 | 127,224 |
| States of the Holy Roman Empire in 1356 | 0 | - | 4.97 | 75,579 |
| Regions of Italy Map Quiz | 0 | - | 4.96 | 150,410 |
| Italy Cities Map Quiz | 0 | - | 4.97 | 153,209 |
| Countries Surrounding Rome | 0 | - | 4.97 | 49,777 |
| Spain Cities Map Quiz | 0 | - | 4.87 | 97,612 |
| Regions of Spain Map Quiz | 0 | - | 4.95 | 187,019 |
| Modern-Day Countries of the British Empire in 1921 | 0 | - | 4.99 | 119,023 |
| Name the English Monarchs | 0 | - | 4.91 | 507,303 |
| Anglo-Saxon Kingdoms of England | 0 | - | 4.60 | 25,834 |
| Giant Great Britain Millennium Quiz | 0 | - | 4.78 | 20,255 |
| England or Wales? | 0 | - | 4.94 | 46,018 |
| Anglo-Saxon and Viking Kings of England | 0 | - | 4.75 | 12,359 |
| Europe by Borders in 30 Seconds | 0 | - | 4.98 | 431,378 |
| Biggest Cities in Germany in 1910 | 0 | - | 4.41 | 23,575 |
| Countries With the Most German Speakers | 0 | - | 4.89 | 99,087 |
| Embarrassing Chapters in British History | 0 | - | 4.30 | 32,405 |
| History of Scotland | 0 | - | 4.51 | 21,190 |
| Kings of France Quiz | 0 | - | 4.22 | 32,967 |
| Countries that Beat Germany | 0 | - | 4.94 | 107,481 |
| Country Quiz on a Map - Germany | 0 | - | 4.95 | 35,647 |
| German Inventions | 0 | - | 3.91 | 30,290 |
| Embarrassing Chapters in German History | 0 | - | 3.40 | 12,692 |
| The Trojan War | 0 | - | 4.83 | 40,054 |
| Letters of the Greek Alphabet | 0 | - | 4.97 | 652,855 |
| Name that Greek Letter | 0 | - | 4.93 | 325,245 |
| Greek Mythology General Knowledge #1 | 0 | - | 4.85 | 113,166 |
| Ancient Roman Trivia #1 | 0 | - | 4.85 | 85,685 |
| Roman Emperors | 0 | - | 4.95 | 121,412 |
| Malta Country Quiz | 0 | - | 4.81 | 31,257 |
| Countries That Use the Euro | 0 | - | 4.95 | 107,197 |
| Europe Cities Map Quiz | 0 | - | 4.99 | 366,574 |
| 10 Easternmost Countries in Europe | 0 | - | 4.87 | 117,466 |
| The Only European Country ... | 0 | - | 4.91 | 219,547 |
| European Countries NOT in NATO | 0 | - | 4.91 | 62,807 |
| History of Russia Quiz | 0 | - | 4.47 | 32,025 |
| 101 Figures from Greek Mythology | 0 | - | 4.99 | 127,856 |
| History of Italy | 0 | - | 4.55 | 32,182 |
| Geography of the Dutch Empire | 0 | - | 4.62 | 34,847 |
| History of The Netherlands | 0 | - | 4.46 | 17,571 |
| Countries of the Spanish Empire | 0 | - | 4.52 | 77,465 |
| Invasions of Great Britain | 0 | - | 4.51 | 60,142 |
| Former Dominions of the British Empire | 0 | - | 4.27 | 24,282 |
| British History Multiple Choice #1 | 0 | - | 4.46 | 55,352 |
| British History Multiple Choice #2 | 0 | - | 4.42 | 38,103 |
| Flags of Europe Quiz | 0 | - | 4.99 | 1,261,198 |
| Countries of Europe - One Minute Sprint | 0 | - | 4.94 | 1,337,072 |
| 10 Biggest European Countries by Area | 0 | - | 4.99 | 193,766 |
| 10 Westernmost Countries in Europe | 0 | - | 4.96 | 152,522 |
| Top 10 Languages Spoken in Europe | 0 | - | 4.96 | 221,231 |
| European Landmarks Map Quiz | 0 | - | 4.97 | 87,903 |
| Countries of Europe with an Empty Map | 0 | - | 5.00 | 313,165 |
| All First-Level Subdivisions of Europe on a Map | 0 | - | 4.99 | 176,475 |
| Countries with Territory in the Balkans | 0 | - | 4.96 | 90,354 |
| Eastern Europe Map Quiz | 0 | - | 4.91 | 128,909 |
| Slavic Countries | 0 | - | 4.96 | 112,497 |
| 15 Most Populous Countries that Speak a Germanic Language | 0 | - | 4.40 | 82,824 |
| Olympian Gods Quiz | 0 | - | 4.96 | 504,366 |
| Ancient Greek Words | 0 | - | 4.93 | 112,642 |
| Oldest Cities in the United Kingdom | 0 | - | 4.39 | 23,840 |
| History of London | 0 | - | 4.33 | 26,282 |
| "Big Five" European Soccer Champions Since 2000 | 0 | - | 4.97 | 362,566 |
| European Countries Ending in "IA" | 0 | - | 4.96 | 69,191 |
| Regions of France | 0 | - | 4.70 | 122,390 |
| France Immigration by Country | 0 | - | 4.70 | 77,004 |
| Largest Islands of Greece | 0 | - | 4.59 | 48,567 |
| Roman Numeral Decoding Quiz | 0 | - | 4.94 | 440,360 |
| Two Letter Roman Numerals | 0 | - | 4.97 | 56,611 |
| Provinces of the Netherlands | 0 | - | 4.80 | 41,930 |
| 100 Greatest Britons Quiz | 0 | - | 4.41 | 48,445 |
| UK Cities Map Quiz | 0 | - | 4.96 | 466,820 |
| Foods in a Full English Breakfast | 0 | - | 4.46 | 103,942 |
| The UK for Americans - True or False | 0 | - | 4.43 | 58,842 |
| Champions League Winners | 0 | - | 4.92 | 1,017,832 |
| European Geography By Letter - P #1 | 0 | - | 4.81 | 99,088 |
| European Diaspora - Top 11 Countries | 0 | - | 4.88 | 96,978 |
| 10 European Countries with the Most Tourists | 0 | - | 4.98 | 138,716 |
| Three Band Flags of Europe | 0 | - | 4.98 | 194,838 |
| Pixelated Europe Map | 0 | - | 4.88 | 123,603 |
| Monarchies of Europe | 0 | - | 4.90 | 99,024 |
| European Countries with One Border | 0 | - | 4.97 | 184,013 |
| European Countries with the Fewest Borders | 0 | - | 4.97 | 180,719 |
| European Geography By Letter - B #2 | 0 | - | 4.87 | 89,063 |
| Federal Subjects of Russia | 0 | - | 4.95 | 149,904 |
| Countries That Border Russia | 0 | - | 4.98 | 464,889 |
| Countries Formerly in Yugoslavia | 0 | - | 4.95 | 125,574 |
| History of Austria | 0 | - | 4.70 | 17,992 |
| Austria Country Quiz | 0 | - | 4.57 | 60,114 |
| Belgium Country Quiz | 0 | - | 4.72 | 72,364 |
| France Country Quiz | 0 | - | 4.70 | 135,789 |
| French Inventions | 0 | - | 4.10 | 13,932 |
| Geography of the French Empire | 0 | - | 4.45 | 27,230 |
| The French Revolution | 0 | - | 4.47 | 24,165 |
| Countries Bordering France | 0 | - | 4.83 | 405,320 |
| History of Paris | 0 | - | 4.24 | 13,684 |
| History of France | 0 | - | 4.61 | 57,719 |
| German Cities with the Most Tourists | 0 | - | 4.77 | 49,170 |
| Countries Closest to Germany A-Z | 0 | - | 4.98 | 27,658 |
| Greece Country Quiz | 0 | - | 4.74 | 66,705 |
| Italy Country Quiz | 0 | - | 4.77 | 124,200 |
| Embarrassing Chapters in Italian History | 0 | - | 4.24 | 12,177 |
| Luxembourg Country Quiz | 0 | - | 4.78 | 33,980 |
| Monaco Country Quiz | 0 | - | 4.48 | 41,722 |
| Netherlands Country Quiz | 0 | - | 4.52 | 81,035 |
| Nordic Cities Map Quiz | 0 | - | 4.77 | 90,796 |
| The Vikings! | 0 | - | 4.46 | 28,419 |
| Sweden Immigration by Country | 0 | - | 4.53 | 56,439 |
| Portugal Country Quiz | 0 | - | 4.69 | 72,409 |
| The Portuguese Empire | 0 | - | 4.58 | 12,117 |
| Spain Country Quiz | 0 | - | 4.44 | 129,378 |
| Switzerland Country Quiz | 0 | - | 4.52 | 63,714 |
| Counties of England Map Quiz | 0 | - | 4.97 | 309,263 |
| United Kingdom A-Z | 0 | - | 4.51 | 88,437 |
| Largest Islands in the British Isles With a Map | 0 | - | 4.52 | 38,881 |
| British Geography Multiple Choice | 0 | - | 4.49 | 43,489 |
| 10 Closest Megacities to London | 0 | - | 4.90 | 17,861 |
| Counties of Wales | 0 | - | 4.63 | 39,675 |
| Top 10 Coldest European Countries | 0 | - | 4.94 | 194,053 |
| Top 10 Hottest European Countries | 0 | - | 4.88 | 127,939 |
| Category Elimination - European Geography #1 | 0 | - | 4.98 | 236,298 |
| European Map without 10 Random Countries | 0 | - | 4.97 | 279,290 |
| Category Elimination - European Geography #2 | 0 | - | 4.99 | 169,227 |
| Name a Valid European Country #1 | 0 | - | 4.99 | 265,325 |
| Name a Valid European Country #2 | 0 | - | 4.94 | 116,110 |
| Russia Country Quiz | 0 | - | 4.83 | 115,435 |
| Croatia Country Quiz | 0 | - | 4.83 | 43,826 |
| Bosnia and Herzegovina Country Quiz | 0 | - | 4.83 | 35,633 |
| Most Popular Baby Girls Names in Germany | 0 | - | 4.51 | 39,023 |
| German History A-Z | 0 | - | 4.49 | 24,942 |
| Most-Mentioned Characters in the Iliad | 0 | - | 4.81 | 21,017 |
| Figures from Greek Mythology | 0 | - | 4.91 | 190,254 |
| History of Ireland | 0 | - | 4.39 | 31,482 |
| Countries Italy Declared War On | 0 | - | 4.74 | 48,079 |
| Byzantine History | 0 | - | 4.91 | 29,045 |
| Byzantine Emperors | 0 | - | 4.93 | 14,659 |
| Canary Islands | 0 | - | 4.62 | 17,549 |
| Biggest Spanish Empire Countries | 0 | - | 4.91 | 117,101 |
| Switzerland Immigration by Country | 0 | - | 4.69 | 30,152 |
| British Spellings | 0 | - | 4.06 | 99,625 |
| British Groups of Things | 0 | - | 4.26 | 83,041 |
| British Acronyms | 0 | - | 4.40 | 45,962 |
| UK Immigration by Country | 0 | - | 4.94 | 141,887 |
| United Kingdom Decoder | 0 | - | 4.29 | 40,125 |
| United Kingdom Country Quiz | 0 | - | 4.96 | 141,248 |
| Biggest Immigrant Groups by Decade in the UK | 0 | - | 4.63 | 25,848 |
| English Monarchs in Order by First Letter | 0 | - | 4.38 | 32,208 |
| Geography of Scotland | 0 | - | 4.63 | 21,807 |
| All UEFA Champions League Teams Ever | 0 | - | 4.85 | 132,449 |
| Countries of the Mongol Empire on a Map | 0 | - | 4.99 | 107,693 |
| U.S. Presidents Quiz | 0 | - | 5.00 | 3,730,700 |
| Deadliest U.S. Wars | 0 | - | 4.89 | 191,962 |
| Countries That Touch the Adriatic Sea | 0 | - | 4.96 | 71,396 |
| European Countries with the Fewest Overnight Visitors | 0 | - | 4.80 | 41,740 |
| Top 10 European Countries by Coastline | 0 | - | 4.86 | 138,821 |
| Top 20 Football Clubs in Europe | 0 | - | 4.48 | 123,915 |
| 100 Longest Rivers in Europe - with a Map | 0 | - | 4.94 | 66,045 |
| Category Elimination - European Countries #1 | 0 | - | 4.90 | 91,256 |
| The Only Remaining European Country . . . | 0 | - | 4.41 | 64,772 |
| Countries that Border Poland | 0 | - | 4.99 | 173,335 |
| Non-Bordering Countries Closest to Russia | 0 | - | 4.91 | 83,348 |
| Countries that Beat Russia | 0 | - | 4.81 | 83,739 |
| Countries With the Most Russian Speakers | 0 | - | 4.97 | 103,237 |
| Countries that Border Hungary | 0 | - | 4.98 | 105,097 |
| North Macedonia Country Quiz | 0 | - | 4.81 | 28,090 |
| Moldova Country Quiz | 0 | - | 4.82 | 31,063 |
| Countries Bordering Serbia | 0 | - | 4.96 | 93,202 |
