| States of the German Confederation in 1848 | 0 | - | 4.90 | 32,533 |
| States of Germany Map Quiz | 0 | - | 4.92 | 134,053 |
| States of Germany | 0 | - | 4.95 | 155,051 |
| Germany Immigration by Country | 0 | - | 4.86 | 81,856 |
| History of Germany | 0 | - | 4.39 | 53,010 |
| Germany Country Quiz | 0 | - | 4.82 | 159,152 |
| Modern Day Countries of the Dutch Empire on a Map | 0 | - | 4.87 | 61,850 |
| Countries of Iberia in History with a Map | 0 | - | 4.88 | 42,568 |
| Modern Day Countries of the Spanish Empire on a Map | 0 | - | 4.95 | 87,073 |
| Counties of England | 0 | - | 4.97 | 804,731 |
| Wives of King Henry VIII | 0 | - | 4.55 | 53,498 |
| Countries the UK Declared War On | 0 | - | 4.55 | 123,413 |
| Geography of the British Empire | 0 | - | 4.48 | 39,890 |
| Countries of Europe in 1815 With a Map | 0 | - | 4.99 | 151,645 |
| Countries of Europe in 1848 | 0 | - | 4.98 | 86,253 |
| Countries of Europe in 1870 with a Map | 0 | - | 4.95 | 66,093 |
| Every Country of Europe Since 1815 With a Map | 0 | - | 4.97 | 72,081 |
| Countries of Europe in 1360 with a Map | 0 | - | 4.99 | 57,787 |
| Regions of France Map Quiz | 0 | - | 4.97 | 145,871 |
| Ancient Greek Trivia | 0 | - | 4.62 | 67,302 |
| Geography of Ancient Greece | 0 | - | 4.69 | 32,081 |
| Regions of Italy | 0 | - | 4.92 | 77,317 |
| Netherlands Immigration by Country | 0 | - | 4.93 | 52,963 |
| Regions of Spain Quiz | 0 | - | 4.91 | 115,680 |
| Cantons of Switzerland | 0 | - | 4.98 | 51,959 |
| Countries and Territories of the United Kingdom | 0 | - | 4.90 | 94,693 |
| Medieval English History | 0 | - | 4.53 | 43,700 |
| Europe Map Quiz | 0 | - | 5.00 | 4,795,169 |
| French History Multiple Choice | 0 | - | 4.55 | 33,284 |
| Countries Bordering Germany | 0 | - | 4.99 | 372,372 |
| Biggest Countries in Europe in 1700 | 0 | - | 4.74 | 58,841 |
| Andorra Country Quiz | 0 | - | 4.91 | 32,021 |
| France Cities Map Quiz | 0 | - | 4.96 | 168,061 |
| Departments of France | 0 | - | 4.93 | 55,462 |
| Germany Cities Map Quiz | 0 | - | 4.87 | 127,308 |
| States of the Holy Roman Empire in 1356 | 0 | - | 4.97 | 75,671 |
| Regions of Italy Map Quiz | 0 | - | 4.96 | 150,485 |
| Italy Cities Map Quiz | 0 | - | 4.97 | 153,288 |
| Countries Surrounding Rome | 0 | - | 4.97 | 49,795 |
| Spain Cities Map Quiz | 0 | - | 4.87 | 97,653 |
| Regions of Spain Map Quiz | 0 | - | 4.95 | 187,088 |
| Modern-Day Countries of the British Empire in 1921 | 0 | - | 4.99 | 119,129 |
| Name the English Monarchs | 0 | - | 4.91 | 507,661 |
| Anglo-Saxon Kingdoms of England | 0 | - | 4.60 | 25,836 |
| Giant Great Britain Millennium Quiz | 0 | - | 4.78 | 20,259 |
| England or Wales? | 0 | - | 4.94 | 46,092 |
| Anglo-Saxon and Viking Kings of England | 0 | - | 4.75 | 12,369 |
| Europe by Borders in 30 Seconds | 0 | - | 4.98 | 431,565 |
| Biggest Cities in Germany in 1910 | 0 | - | 4.41 | 23,581 |
| Countries With the Most German Speakers | 0 | - | 4.89 | 99,293 |
| Embarrassing Chapters in British History | 0 | - | 4.31 | 32,418 |
| History of Scotland | 0 | - | 4.51 | 21,198 |
| Kings of France Quiz | 0 | - | 4.22 | 32,975 |
| Countries that Beat Germany | 0 | - | 4.94 | 107,562 |
| Country Quiz on a Map - Germany | 0 | - | 4.95 | 35,696 |
| German Inventions | 0 | - | 3.91 | 30,290 |
| Embarrassing Chapters in German History | 0 | - | 3.40 | 12,696 |
| The Trojan War | 0 | - | 4.83 | 40,121 |
| Letters of the Greek Alphabet | 0 | - | 4.97 | 653,358 |
| Name that Greek Letter | 0 | - | 4.93 | 325,406 |
| Greek Mythology General Knowledge #1 | 0 | - | 4.85 | 113,356 |
| Ancient Roman Trivia #1 | 0 | - | 4.85 | 85,729 |
| Roman Emperors | 0 | - | 4.95 | 121,520 |
| Malta Country Quiz | 0 | - | 4.81 | 31,276 |
| Countries That Use the Euro | 0 | - | 4.95 | 107,368 |
| Europe Cities Map Quiz | 0 | - | 4.99 | 366,698 |
| 10 Easternmost Countries in Europe | 0 | - | 4.87 | 117,603 |
| The Only European Country ... | 0 | - | 4.91 | 219,764 |
| European Countries NOT in NATO | 0 | - | 4.91 | 62,925 |
| History of Russia Quiz | 0 | - | 4.47 | 32,032 |
| 101 Figures from Greek Mythology | 0 | - | 4.99 | 128,110 |
| History of Italy | 0 | - | 4.55 | 32,199 |
| Geography of the Dutch Empire | 0 | - | 4.62 | 34,867 |
| History of The Netherlands | 0 | - | 4.46 | 17,580 |
| Countries of the Spanish Empire | 0 | - | 4.52 | 77,482 |
| Invasions of Great Britain | 0 | - | 4.51 | 60,156 |
| Former Dominions of the British Empire | 0 | - | 4.27 | 24,288 |
| British History Multiple Choice #1 | 0 | - | 4.46 | 55,364 |
| British History Multiple Choice #2 | 0 | - | 4.42 | 38,115 |
| Flags of Europe Quiz | 0 | - | 4.99 | 1,262,479 |
| Countries of Europe - One Minute Sprint | 0 | - | 4.94 | 1,337,742 |
| 10 Biggest European Countries by Area | 0 | - | 4.99 | 193,852 |
| 10 Westernmost Countries in Europe | 0 | - | 4.96 | 152,594 |
| Top 10 Languages Spoken in Europe | 0 | - | 4.96 | 221,434 |
| European Landmarks Map Quiz | 0 | - | 4.97 | 87,950 |
| Countries of Europe with an Empty Map | 0 | - | 5.00 | 313,340 |
| All First-Level Subdivisions of Europe on a Map | 0 | - | 4.99 | 176,762 |
| Countries with Territory in the Balkans | 0 | - | 4.96 | 90,434 |
| Eastern Europe Map Quiz | 0 | - | 4.91 | 128,961 |
| Slavic Countries | 0 | - | 4.96 | 112,567 |
| 15 Most Populous Countries that Speak a Germanic Language | 0 | - | 4.40 | 82,832 |
| Olympian Gods Quiz | 0 | - | 4.96 | 504,717 |
| Ancient Greek Words | 0 | - | 4.93 | 112,738 |
| Oldest Cities in the United Kingdom | 0 | - | 4.39 | 23,844 |
| History of London | 0 | - | 4.33 | 26,289 |
| "Big Five" European Soccer Champions Since 2000 | 0 | - | 4.97 | 363,041 |
| European Countries Ending in "IA" | 0 | - | 4.96 | 69,262 |
| Regions of France | 0 | - | 4.70 | 122,508 |
| France Immigration by Country | 0 | - | 4.70 | 77,040 |
| Largest Islands of Greece | 0 | - | 4.59 | 48,614 |
| Roman Numeral Decoding Quiz | 0 | - | 4.94 | 440,672 |
| Two Letter Roman Numerals | 0 | - | 4.97 | 56,659 |
| Provinces of the Netherlands | 0 | - | 4.80 | 41,978 |
| 100 Greatest Britons Quiz | 0 | - | 4.41 | 48,519 |
| UK Cities Map Quiz | 0 | - | 4.96 | 466,965 |
| Foods in a Full English Breakfast | 0 | - | 4.46 | 103,997 |
| The UK for Americans - True or False | 0 | - | 4.43 | 58,863 |
| Champions League Winners | 0 | - | 4.92 | 1,018,615 |
| European Geography By Letter - P #1 | 0 | - | 4.81 | 99,262 |
| European Diaspora - Top 11 Countries | 0 | - | 4.88 | 97,034 |
| 10 European Countries with the Most Tourists | 0 | - | 4.98 | 138,800 |
| Three Band Flags of Europe | 0 | - | 4.98 | 194,965 |
| Pixelated Europe Map | 0 | - | 4.88 | 123,724 |
| Monarchies of Europe | 0 | - | 4.90 | 99,087 |
| European Countries with One Border | 0 | - | 4.97 | 184,103 |
| European Countries with the Fewest Borders | 0 | - | 4.97 | 180,821 |
| European Geography By Letter - B #2 | 0 | - | 4.87 | 89,305 |
| Federal Subjects of Russia | 0 | - | 4.95 | 150,034 |
| Countries That Border Russia | 0 | - | 4.98 | 465,085 |
| Countries Formerly in Yugoslavia | 0 | - | 4.95 | 125,629 |
| History of Austria | 0 | - | 4.70 | 17,992 |
| Austria Country Quiz | 0 | - | 4.57 | 60,145 |
| Belgium Country Quiz | 0 | - | 4.72 | 72,410 |
| France Country Quiz | 0 | - | 4.70 | 135,860 |
| French Inventions | 0 | - | 4.10 | 13,933 |
| Geography of the French Empire | 0 | - | 4.45 | 27,242 |
| The French Revolution | 0 | - | 4.47 | 24,175 |
| Countries Bordering France | 0 | - | 4.83 | 405,498 |
| History of Paris | 0 | - | 4.24 | 13,687 |
| History of France | 0 | - | 4.61 | 57,765 |
| German Cities with the Most Tourists | 0 | - | 4.77 | 49,200 |
| Countries Closest to Germany A-Z | 0 | - | 4.98 | 27,677 |
| Greece Country Quiz | 0 | - | 4.74 | 66,748 |
| Italy Country Quiz | 0 | - | 4.77 | 124,276 |
| Embarrassing Chapters in Italian History | 0 | - | 4.24 | 12,186 |
| Luxembourg Country Quiz | 0 | - | 4.78 | 34,002 |
| Monaco Country Quiz | 0 | - | 4.48 | 41,739 |
| Netherlands Country Quiz | 0 | - | 4.52 | 81,083 |
| Nordic Cities Map Quiz | 0 | - | 4.77 | 90,825 |
| The Vikings! | 0 | - | 4.46 | 28,433 |
| Sweden Immigration by Country | 0 | - | 4.53 | 56,453 |
| Portugal Country Quiz | 0 | - | 4.69 | 72,456 |
| The Portuguese Empire | 0 | - | 4.58 | 12,120 |
| Spain Country Quiz | 0 | - | 4.44 | 129,461 |
| Switzerland Country Quiz | 0 | - | 4.52 | 63,751 |
| Counties of England Map Quiz | 0 | - | 4.97 | 309,359 |
| United Kingdom A-Z | 0 | - | 4.51 | 88,501 |
| Largest Islands in the British Isles With a Map | 0 | - | 4.52 | 38,891 |
| British Geography Multiple Choice | 0 | - | 4.49 | 43,509 |
| 10 Closest Megacities to London | 0 | - | 4.90 | 17,879 |
| Counties of Wales | 0 | - | 4.63 | 39,684 |
| Top 10 Coldest European Countries | 0 | - | 4.94 | 194,141 |
| Top 10 Hottest European Countries | 0 | - | 4.88 | 128,038 |
| Category Elimination - European Geography #1 | 0 | - | 4.98 | 236,495 |
| European Map without 10 Random Countries | 0 | - | 4.97 | 279,461 |
| Category Elimination - European Geography #2 | 0 | - | 4.99 | 169,396 |
| Name a Valid European Country #1 | 0 | - | 4.99 | 265,628 |
| Name a Valid European Country #2 | 0 | - | 4.94 | 116,194 |
| Russia Country Quiz | 0 | - | 4.83 | 115,508 |
| Croatia Country Quiz | 0 | - | 4.83 | 43,868 |
| Bosnia and Herzegovina Country Quiz | 0 | - | 4.85 | 35,673 |
| Most Popular Baby Girls Names in Germany | 0 | - | 4.51 | 39,035 |
| German History A-Z | 0 | - | 4.49 | 24,956 |
| Most-Mentioned Characters in the Iliad | 0 | - | 4.81 | 21,089 |
| Figures from Greek Mythology | 0 | - | 4.92 | 194,498 |
| History of Ireland | 0 | - | 4.39 | 31,511 |
| Countries Italy Declared War On | 0 | - | 4.77 | 49,979 |
| Byzantine History | 0 | - | 4.91 | 29,065 |
| Byzantine Emperors | 0 | - | 4.93 | 14,672 |
| Canary Islands | 0 | - | 4.62 | 17,551 |
| Biggest Spanish Empire Countries | 0 | - | 4.91 | 117,180 |
| Switzerland Immigration by Country | 0 | - | 4.69 | 30,188 |
| British Spellings | 0 | - | 4.06 | 99,642 |
| British Groups of Things | 0 | - | 4.26 | 83,050 |
| British Acronyms | 0 | - | 4.40 | 45,994 |
| UK Immigration by Country | 0 | - | 4.94 | 141,949 |
| United Kingdom Decoder | 0 | - | 4.29 | 40,136 |
| United Kingdom Country Quiz | 0 | - | 4.96 | 141,374 |
| Biggest Immigrant Groups by Decade in the UK | 0 | - | 4.63 | 25,893 |
| English Monarchs in Order by First Letter | 0 | - | 4.38 | 32,238 |
| Geography of Scotland | 0 | - | 4.63 | 21,841 |
| All UEFA Champions League Teams Ever | 0 | - | 4.85 | 132,588 |
| Countries of the Mongol Empire on a Map | 0 | - | 4.99 | 107,757 |
| U.S. Presidents Quiz | 0 | - | 5.00 | 3,733,123 |
| Deadliest U.S. Wars | 0 | - | 4.89 | 192,090 |
| Countries That Touch the Adriatic Sea | 0 | - | 4.96 | 71,420 |
| European Countries with the Fewest Overnight Visitors | 0 | - | 4.80 | 41,742 |
| Top 10 European Countries by Coastline | 0 | - | 4.86 | 138,853 |
| Top 20 Football Clubs in Europe | 0 | - | 4.48 | 124,614 |
| 100 Longest Rivers in Europe - with a Map | 0 | - | 4.94 | 66,091 |
| Category Elimination - European Countries #1 | 0 | - | 4.90 | 91,332 |
| The Only Remaining European Country . . . | 0 | - | 4.41 | 64,816 |
| Countries that Border Poland | 0 | - | 4.99 | 173,402 |
| Non-Bordering Countries Closest to Russia | 0 | - | 4.91 | 83,377 |
| Countries that Beat Russia | 0 | - | 4.81 | 83,801 |
| Countries With the Most Russian Speakers | 0 | - | 4.97 | 103,463 |
| Countries that Border Hungary | 0 | - | 4.98 | 105,131 |
| North Macedonia Country Quiz | 0 | - | 4.81 | 28,102 |
| Moldova Country Quiz | 0 | - | 4.82 | 31,084 |
| Countries Bordering Serbia | 0 | - | 4.96 | 93,252 |
