| States of the German Confederation in 1848 | 0 | - | 4.90 | 32,412 |
| States of Germany Map Quiz | 0 | - | 4.92 | 133,740 |
| States of Germany | 0 | - | 4.95 | 154,330 |
| Germany Immigration by Country | 0 | - | 4.86 | 81,650 |
| History of Germany | 0 | - | 4.39 | 52,966 |
| Germany Country Quiz | 0 | - | 4.82 | 158,763 |
| Modern Day Countries of the Spanish Empire on a Map | 0 | - | 4.95 | 86,832 |
| Counties of England | 0 | - | 4.97 | 802,353 |
| Wives of King Henry VIII | 0 | - | 4.55 | 53,451 |
| Countries the UK Declared War On | 0 | - | 4.55 | 123,205 |
| Geography of the British Empire | 0 | - | 4.48 | 39,840 |
| Ancient Greek Trivia | 0 | - | 4.62 | 67,213 |
| Geography of Ancient Greece | 0 | - | 4.69 | 32,034 |
| Medieval English History | 0 | - | 4.53 | 43,642 |
| Countries of Europe in 1815 With a Map | 0 | - | 4.99 | 151,282 |
| Countries of Europe in 1848 | 0 | - | 4.98 | 85,184 |
| Countries of Europe in 1870 with a Map | 0 | - | 4.95 | 65,678 |
| Every Country of Europe Since 1815 With a Map | 0 | - | 4.98 | 71,773 |
| Countries of Europe in 1360 with a Map | 0 | - | 4.99 | 57,512 |
| Regions of France Map Quiz | 0 | - | 4.97 | 145,549 |
| French History Multiple Choice | 0 | - | 4.55 | 33,214 |
| Countries Bordering Germany | 0 | - | 4.99 | 371,672 |
| Regions of Italy | 0 | - | 4.92 | 76,967 |
| Netherlands Immigration by Country | 0 | - | 4.93 | 52,763 |
| Regions of Spain Quiz | 0 | - | 4.90 | 115,236 |
| Cantons of Switzerland | 0 | - | 4.98 | 51,708 |
| Countries and Territories of the United Kingdom | 0 | - | 4.90 | 94,479 |
| Anglo-Saxon and Viking Kings of England | 0 | - | 4.74 | 12,325 |
| Europe Map Quiz | 0 | - | 5.00 | 4,785,678 |
| Andorra Country Quiz | 0 | - | 4.91 | 31,915 |
| France Cities Map Quiz | 0 | - | 4.96 | 167,721 |
| Departments of France | 0 | - | 4.93 | 55,064 |
| Germany Cities Map Quiz | 0 | - | 4.87 | 127,025 |
| States of the Holy Roman Empire in 1356 | 0 | - | 4.97 | 75,237 |
| Regions of Italy Map Quiz | 0 | - | 4.96 | 150,151 |
| Italy Cities Map Quiz | 0 | - | 4.97 | 152,978 |
| Countries Surrounding Rome | 0 | - | 4.97 | 49,727 |
| Spain Cities Map Quiz | 0 | - | 4.87 | 97,419 |
| Regions of Spain Map Quiz | 0 | - | 4.95 | 186,793 |
| Modern-Day Countries of the British Empire in 1921 | 0 | - | 4.99 | 118,665 |
| Anglo-Saxon Kingdoms of England | 0 | - | 4.60 | 25,823 |
| Giant Great Britain Millennium Quiz | 0 | - | 4.78 | 20,237 |
| England or Wales? | 0 | - | 4.94 | 45,943 |
| Biggest Countries in Europe in 1700 | 0 | - | 4.73 | 58,733 |
| Countries With the Most German Speakers | 0 | - | 4.89 | 98,477 |
| Name the English Monarchs | 0 | - | 4.91 | 506,083 |
| Embarrassing Chapters in British History | 0 | - | 4.30 | 32,360 |
| History of Scotland | 0 | - | 4.51 | 21,169 |
| Europe by Borders in 30 Seconds | 0 | - | 4.98 | 430,651 |
| Kings of France Quiz | 0 | - | 4.20 | 32,907 |
| Biggest Cities in Germany in 1910 | 0 | - | 4.41 | 23,556 |
| Countries that Beat Germany | 0 | - | 4.94 | 107,257 |
| Country Quiz on a Map - Germany | 0 | - | 4.95 | 35,524 |
| German Inventions | 0 | - | 3.91 | 30,280 |
| Embarrassing Chapters in German History | 0 | - | 3.40 | 12,682 |
| The Trojan War | 0 | - | 4.83 | 39,966 |
| Letters of the Greek Alphabet | 0 | - | 4.97 | 651,541 |
| Name that Greek Letter | 0 | - | 4.93 | 324,882 |
| Greek Mythology General Knowledge #1 | 0 | - | 4.85 | 112,866 |
| Ancient Roman Trivia #1 | 0 | - | 4.85 | 85,561 |
| Roman Emperors | 0 | - | 4.95 | 121,096 |
| Malta Country Quiz | 0 | - | 4.81 | 31,226 |
| Countries That Use the Euro | 0 | - | 4.95 | 106,624 |
| Europe Cities Map Quiz | 0 | - | 4.99 | 366,083 |
| 10 Easternmost Countries in Europe | 0 | - | 4.87 | 116,993 |
| The Only European Country ... | 0 | - | 4.91 | 218,795 |
| European Countries NOT in NATO | 0 | - | 4.91 | 62,409 |
| Olympian Gods Quiz | 0 | - | 4.96 | 503,521 |
| 101 Figures from Greek Mythology | 0 | - | 4.99 | 127,404 |
| History of The Netherlands | 0 | - | 4.46 | 17,545 |
| Former Dominions of the British Empire | 0 | - | 4.27 | 24,260 |
| Flags of Europe Quiz | 0 | - | 4.99 | 1,256,704 |
| Countries of Europe - One Minute Sprint | 0 | - | 4.94 | 1,335,079 |
| History of Russia Quiz | 0 | - | 4.47 | 31,999 |
| 15 Most Populous Countries that Speak a Germanic Language | 0 | - | 4.40 | 82,770 |
| Ancient Greek Words | 0 | - | 4.93 | 112,392 |
| History of Italy | 0 | - | 4.55 | 32,138 |
| Geography of the Dutch Empire | 0 | - | 4.62 | 34,810 |
| Countries of the Spanish Empire | 0 | - | 4.52 | 77,413 |
| Invasions of Great Britain | 0 | - | 4.51 | 60,079 |
| Oldest Cities in the United Kingdom | 0 | - | 4.39 | 23,821 |
| History of London | 0 | - | 4.33 | 26,266 |
| British History Multiple Choice #1 | 0 | - | 4.46 | 55,299 |
| British History Multiple Choice #2 | 0 | - | 4.42 | 38,078 |
| "Big Five" European Soccer Champions Since 2000 | 0 | - | 4.97 | 361,206 |
| 10 Biggest European Countries by Area | 0 | - | 4.99 | 193,431 |
| 10 Westernmost Countries in Europe | 0 | - | 4.96 | 151,981 |
| Top 10 Languages Spoken in Europe | 0 | - | 4.96 | 220,591 |
| European Landmarks Map Quiz | 0 | - | 4.97 | 87,722 |
| Countries of Europe with an Empty Map | 0 | - | 5.00 | 312,549 |
| All First-Level Subdivisions of Europe on a Map | 0 | - | 4.99 | 175,505 |
| Countries with Territory in the Balkans | 0 | - | 4.96 | 90,109 |
| Eastern Europe Map Quiz | 0 | - | 4.91 | 128,726 |
| Slavic Countries | 0 | - | 4.96 | 112,316 |
| Regions of France | 0 | - | 4.70 | 121,980 |
| France Immigration by Country | 0 | - | 4.70 | 76,902 |
| Largest Islands of Greece | 0 | - | 4.59 | 48,431 |
| Roman Numeral Decoding Quiz | 0 | - | 4.94 | 439,574 |
| Two Letter Roman Numerals | 0 | - | 4.97 | 56,487 |
| Provinces of the Netherlands | 0 | - | 4.80 | 41,713 |
| 100 Greatest Britons Quiz | 0 | - | 4.41 | 48,398 |
| UK Cities Map Quiz | 0 | - | 4.96 | 466,303 |
| Foods in a Full English Breakfast | 0 | - | 4.46 | 103,761 |
| The UK for Americans - True or False | 0 | - | 4.43 | 58,803 |
| Champions League Winners | 0 | - | 4.92 | 1,015,310 |
| European Geography By Letter - P #1 | 0 | - | 4.81 | 98,664 |
| European Diaspora - Top 11 Countries | 0 | - | 4.88 | 96,434 |
| 10 European Countries with the Most Tourists | 0 | - | 4.98 | 138,410 |
| Three Band Flags of Europe | 0 | - | 4.98 | 194,483 |
| Pixelated Europe Map | 0 | - | 4.88 | 123,415 |
| Monarchies of Europe | 0 | - | 4.90 | 98,799 |
| European Countries with One Border | 0 | - | 4.97 | 183,700 |
| European Countries with the Fewest Borders | 0 | - | 4.97 | 180,457 |
| European Geography By Letter - B #2 | 0 | - | 4.87 | 88,475 |
| Federal Subjects of Russia | 0 | - | 4.95 | 149,336 |
| Countries That Border Russia | 0 | - | 4.98 | 464,341 |
| Countries Formerly in Yugoslavia | 0 | - | 4.95 | 125,429 |
| History of Austria | 0 | - | 4.70 | 17,968 |
| Austria Country Quiz | 0 | - | 4.57 | 60,029 |
| Belgium Country Quiz | 0 | - | 4.72 | 72,215 |
| France Country Quiz | 0 | - | 4.70 | 135,596 |
| French Inventions | 0 | - | 4.10 | 13,923 |
| Geography of the French Empire | 0 | - | 4.45 | 27,209 |
| The French Revolution | 0 | - | 4.47 | 24,136 |
| Countries Bordering France | 0 | - | 4.83 | 404,730 |
| History of Paris | 0 | - | 4.24 | 13,681 |
| History of France | 0 | - | 4.61 | 57,568 |
| German Cities with the Most Tourists | 0 | - | 4.77 | 49,085 |
| Countries Closest to Germany A-Z | 0 | - | 4.98 | 27,575 |
| Greece Country Quiz | 0 | - | 4.74 | 66,611 |
| Most-Mentioned Characters in the Iliad | 0 | - | 4.81 | 20,951 |
| Figures from Greek Mythology | 0 | - | 4.91 | 188,699 |
| Italy Country Quiz | 0 | - | 4.77 | 123,980 |
| Embarrassing Chapters in Italian History | 0 | - | 4.24 | 12,160 |
| Luxembourg Country Quiz | 0 | - | 4.78 | 33,934 |
| Monaco Country Quiz | 0 | - | 4.48 | 41,676 |
| Netherlands Country Quiz | 0 | - | 4.52 | 80,909 |
| Nordic Cities Map Quiz | 0 | - | 4.77 | 90,706 |
| The Vikings! | 0 | - | 4.46 | 28,400 |
| Sweden Immigration by Country | 0 | - | 4.53 | 56,363 |
| Portugal Country Quiz | 0 | - | 4.69 | 72,282 |
| The Portuguese Empire | 0 | - | 4.58 | 12,100 |
| Spain Country Quiz | 0 | - | 4.44 | 129,190 |
| Switzerland Country Quiz | 0 | - | 4.52 | 63,626 |
| Counties of England Map Quiz | 0 | - | 4.97 | 308,941 |
| United Kingdom A-Z | 0 | - | 4.51 | 88,338 |
| Largest Islands in the British Isles With a Map | 0 | - | 4.52 | 38,844 |
| British Geography Multiple Choice | 0 | - | 4.49 | 43,439 |
| 10 Closest Megacities to London | 0 | - | 4.90 | 17,834 |
| Counties of Wales | 0 | - | 4.63 | 39,577 |
| U.S. Presidents Quiz | 0 | - | 5.00 | 3,723,653 |
| Deadliest U.S. Wars | 0 | - | 4.89 | 191,708 |
| Top 10 Coldest European Countries | 0 | - | 4.94 | 193,803 |
| Top 10 Hottest European Countries | 0 | - | 4.88 | 127,731 |
| Countries That Touch the Adriatic Sea | 0 | - | 4.96 | 71,326 |
| Top 10 European Countries by Coastline | 0 | - | 4.88 | 138,694 |
| 100 Longest Rivers in Europe - with a Map | 0 | - | 4.94 | 65,898 |
| Category Elimination - European Geography #1 | 0 | - | 4.98 | 235,633 |
| European Map without 10 Random Countries | 0 | - | 4.97 | 278,781 |
| Category Elimination - European Geography #2 | 0 | - | 4.99 | 168,768 |
| Category Elimination - European Countries #1 | 0 | - | 4.90 | 90,997 |
| Name a Valid European Country #1 | 0 | - | 4.99 | 264,367 |
| Name a Valid European Country #2 | 0 | - | 4.94 | 115,804 |
| Countries that Border Poland | 0 | - | 4.99 | 173,101 |
| Russia Country Quiz | 0 | - | 4.83 | 115,271 |
| Non-Bordering Countries Closest to Russia | 0 | - | 4.91 | 83,229 |
| Countries With the Most Russian Speakers | 0 | - | 4.97 | 102,663 |
| Croatia Country Quiz | 0 | - | 4.83 | 43,710 |
| Countries that Border Hungary | 0 | - | 4.98 | 104,975 |
| Bosnia and Herzegovina Country Quiz | 0 | - | 4.86 | 35,560 |
| Countries Bordering Serbia | 0 | - | 4.96 | 93,026 |
| French Geography Quiz #1 | 0 | - | 4.89 | 35,062 |
| Countries Bordering Austria | 0 | - | 4.97 | 118,912 |
| Countries that Visit France the Most | 0 | - | 4.85 | 46,130 |
| Countries Closest to Metropolitan France | 0 | - | 4.89 | 72,447 |
| Embarrassing Chapters in French History | 0 | - | 3.65 | 20,169 |
| Most Popular Baby Girls Names in Germany | 0 | - | 4.51 | 38,979 |
| German History A-Z | 0 | - | 4.49 | 24,893 |
| Counties of Ireland | 0 | - | 4.92 | 197,192 |
| History of Ireland | 0 | - | 4.39 | 31,418 |
| Countries Bordering Italy | 0 | - | 4.94 | 101,224 |
| Countries Italy Declared War On | 0 | - | 4.75 | 43,618 |
| Countries Closest to Italy | 0 | - | 4.97 | 199,296 |
| Byzantine History | 0 | - | 4.91 | 29,013 |
| Byzantine Emperors | 0 | - | 4.93 | 14,573 |
| Canary Islands | 0 | - | 4.62 | 17,522 |
| Biggest Spanish Empire Countries | 0 | - | 4.91 | 116,766 |
| Countries Closest to Spain | 0 | - | 4.96 | 228,030 |
| Switzerland Immigration by Country | 0 | - | 4.69 | 30,031 |
| British Spellings | 0 | - | 4.06 | 99,590 |
| British Groups of Things | 0 | - | 4.26 | 82,997 |
| British Acronyms | 0 | - | 4.40 | 45,927 |
| UK Immigration by Country | 0 | - | 4.94 | 141,631 |
| United Kingdom Decoder | 0 | - | 4.29 | 40,099 |
| United Kingdom Country Quiz | 0 | - | 4.96 | 140,897 |
| Biggest Immigrant Groups by Decade in the UK | 0 | - | 4.63 | 25,686 |
| English Monarchs in Order by First Letter | 0 | - | 4.38 | 32,094 |
| Counties of the UK and Ireland | 0 | - | 4.98 | 132,264 |
| Geography of Scotland | 0 | - | 4.63 | 21,729 |
| World Capitals Closest to London | 0 | - | 4.88 | 111,029 |
