| States of the German Confederation in 1848 | 0 | - | 4.90 | 32,509 |
| States of Germany Map Quiz | 0 | - | 4.92 | 133,973 |
| States of Germany | 0 | - | 4.95 | 154,921 |
| Germany Immigration by Country | 0 | - | 4.86 | 81,799 |
| Germany Country Quiz | 0 | - | 4.82 | 159,043 |
| Name the English Monarchs | 0 | - | 4.91 | 507,324 |
| Modern Day Countries of the Dutch Empire on a Map | 0 | - | 4.87 | 61,793 |
| Countries of Iberia in History with a Map | 0 | - | 4.88 | 42,501 |
| Modern Day Countries of the Spanish Empire on a Map | 0 | - | 4.95 | 87,005 |
| History of Germany | 0 | - | 4.39 | 53,000 |
| The Trojan War | 0 | - | 4.83 | 40,059 |
| Greek Mythology General Knowledge #1 | 0 | - | 4.85 | 113,174 |
| Ancient Roman Trivia #1 | 0 | - | 4.85 | 85,687 |
| Roman Emperors | 0 | - | 4.95 | 121,421 |
| Counties of England | 0 | - | 4.97 | 804,175 |
| Ancient Greek Trivia | 0 | - | 4.62 | 67,278 |
| Geography of Ancient Greece | 0 | - | 4.69 | 32,071 |
| Medieval English History | 0 | - | 4.53 | 43,688 |
| Countries of Europe in 1815 With a Map | 0 | - | 4.99 | 151,544 |
| Countries of Europe in 1848 | 0 | - | 4.98 | 86,007 |
| Countries of Europe in 1870 with a Map | 0 | - | 4.95 | 65,992 |
| Every Country of Europe Since 1815 With a Map | 0 | - | 4.97 | 72,004 |
| Countries of Europe in 1360 with a Map | 0 | - | 4.99 | 57,718 |
| Regions of France Map Quiz | 0 | - | 4.97 | 145,802 |
| French History Multiple Choice | 0 | - | 4.55 | 33,276 |
| Countries Bordering Germany | 0 | - | 4.99 | 372,225 |
| Regions of Italy | 0 | - | 4.92 | 77,255 |
| Netherlands Immigration by Country | 0 | - | 4.93 | 52,909 |
| Regions of Spain Quiz | 0 | - | 4.90 | 115,573 |
| Cantons of Switzerland | 0 | - | 4.98 | 51,893 |
| Countries and Territories of the United Kingdom | 0 | - | 4.90 | 94,622 |
| British History Multiple Choice #1 | 0 | - | 4.46 | 55,353 |
| British History Multiple Choice #2 | 0 | - | 4.42 | 38,104 |
| Europe Map Quiz | 0 | - | 5.00 | 4,793,056 |
| Andorra Country Quiz | 0 | - | 4.91 | 31,987 |
| France Cities Map Quiz | 0 | - | 4.96 | 167,997 |
| Departments of France | 0 | - | 4.93 | 55,388 |
| Germany Cities Map Quiz | 0 | - | 4.87 | 127,229 |
| States of the Holy Roman Empire in 1356 | 0 | - | 4.97 | 75,584 |
| Regions of Italy Map Quiz | 0 | - | 4.96 | 150,414 |
| Italy Cities Map Quiz | 0 | - | 4.97 | 153,211 |
| Countries Surrounding Rome | 0 | - | 4.97 | 49,778 |
| Spain Cities Map Quiz | 0 | - | 4.87 | 97,616 |
| Regions of Spain Map Quiz | 0 | - | 4.95 | 187,025 |
| Modern-Day Countries of the British Empire in 1921 | 0 | - | 4.99 | 119,027 |
| England or Wales? | 0 | - | 4.94 | 46,026 |
| Biggest Countries in Europe in 1700 | 0 | - | 4.73 | 58,817 |
| Countries With the Most German Speakers | 0 | - | 4.89 | 99,095 |
| Wives of King Henry VIII | 0 | - | 4.55 | 53,488 |
| Countries the UK Declared War On | 0 | - | 4.55 | 123,364 |
| Geography of the British Empire | 0 | - | 4.48 | 39,872 |
| Embarrassing Chapters in British History | 0 | - | 4.30 | 32,405 |
| History of Scotland | 0 | - | 4.51 | 21,191 |
| Europe by Borders in 30 Seconds | 0 | - | 4.98 | 431,382 |
| Kings of France Quiz | 0 | - | 4.22 | 32,967 |
| Biggest Cities in Germany in 1910 | 0 | - | 4.41 | 23,575 |
| Countries that Beat Germany | 0 | - | 4.94 | 107,484 |
| Country Quiz on a Map - Germany | 0 | - | 4.95 | 35,649 |
| German Inventions | 0 | - | 3.91 | 30,290 |
| Embarrassing Chapters in German History | 0 | - | 3.40 | 12,692 |
| Letters of the Greek Alphabet | 0 | - | 4.97 | 652,877 |
| Name that Greek Letter | 0 | - | 4.93 | 325,250 |
| Malta Country Quiz | 0 | - | 4.81 | 31,259 |
| Countries That Use the Euro | 0 | - | 4.95 | 107,213 |
| Europe Cities Map Quiz | 0 | - | 4.99 | 366,578 |
| 10 Easternmost Countries in Europe | 0 | - | 4.87 | 117,470 |
| The Only European Country ... | 0 | - | 4.91 | 219,559 |
| European Countries NOT in NATO | 0 | - | 4.91 | 62,811 |
| Olympian Gods Quiz | 0 | - | 4.96 | 504,378 |
| 101 Figures from Greek Mythology | 0 | - | 4.99 | 127,869 |
| History of The Netherlands | 0 | - | 4.46 | 17,571 |
| Flags of Europe Quiz | 0 | - | 4.99 | 1,261,266 |
| Countries of Europe - One Minute Sprint | 0 | - | 4.94 | 1,337,097 |
| History of Russia Quiz | 0 | - | 4.47 | 32,025 |
| 15 Most Populous Countries that Speak a Germanic Language | 0 | - | 4.40 | 82,824 |
| Ancient Greek Words | 0 | - | 4.93 | 112,647 |
| Greek Mythology General Knowledge #2 | 0 | - | 4.59 | 74,442 |
| Ancient Greece - Multiple Choice | 0 | - | 4.54 | 41,889 |
| History of Italy | 0 | - | 4.55 | 32,183 |
| Ancient Roman Trivia #2 | 0 | - | 4.61 | 44,380 |
| Geography of the Roman Empire | 0 | - | 4.55 | 52,263 |
| Roman Names for Places | 0 | - | 4.62 | 58,780 |
| Geography of the Dutch Empire | 0 | - | 4.62 | 34,849 |
| Countries of the Spanish Empire | 0 | - | 4.52 | 77,465 |
| Invasions of Great Britain | 0 | - | 4.51 | 60,143 |
| Oldest Cities in the United Kingdom | 0 | - | 4.39 | 23,840 |
| Anglo-Saxon Kingdoms of England | 0 | - | 4.60 | 25,834 |
| The Reign of Queen Elizabeth I | 0 | - | 4.53 | 32,002 |
| Giant Great Britain Millennium Quiz | 0 | - | 4.78 | 20,255 |
| Houses of British Monarchs | 0 | - | 4.54 | 66,019 |
| History of London | 0 | - | 4.33 | 26,282 |
| "Big Five" European Soccer Champions Since 2000 | 0 | - | 4.97 | 362,598 |
| Anglo-Saxon and Viking Kings of England | 0 | - | 4.75 | 12,360 |
| 10 Biggest European Countries by Area | 0 | - | 4.99 | 193,775 |
| 10 Westernmost Countries in Europe | 0 | - | 4.96 | 152,525 |
| Top 10 Languages Spoken in Europe | 0 | - | 4.96 | 221,240 |
| European Landmarks Map Quiz | 0 | - | 4.97 | 87,904 |
| Countries of Europe with an Empty Map | 0 | - | 5.00 | 313,166 |
| All First-Level Subdivisions of Europe on a Map | 0 | - | 4.99 | 176,486 |
| Countries with Territory in the Balkans | 0 | - | 4.96 | 90,356 |
| Eastern Europe Map Quiz | 0 | - | 4.91 | 128,910 |
| Slavic Countries | 0 | - | 4.96 | 112,504 |
| Regions of France | 0 | - | 4.70 | 122,393 |
| France Immigration by Country | 0 | - | 4.70 | 77,005 |
| The Reign of Napoleon | 0 | - | 4.54 | 39,213 |
| Largest Islands of Greece | 0 | - | 4.59 | 48,568 |
| Roman Numeral Decoding Quiz | 0 | - | 4.94 | 440,377 |
| Two Letter Roman Numerals | 0 | - | 4.97 | 56,613 |
| Provinces of the Netherlands | 0 | - | 4.80 | 41,931 |
| 100 Greatest Britons Quiz | 0 | - | 4.41 | 48,447 |
| UK Cities Map Quiz | 0 | - | 4.96 | 466,830 |
| Foods in a Full English Breakfast | 0 | - | 4.46 | 103,948 |
| The UK for Americans - True or False | 0 | - | 4.43 | 58,842 |
| Champions League Winners | 0 | - | 4.92 | 1,017,901 |
| European Countries Ending in "IA" | 0 | - | 4.96 | 69,193 |
| European Geography By Letter - P #1 | 0 | - | 4.81 | 99,090 |
| European Diaspora - Top 11 Countries | 0 | - | 4.88 | 96,981 |
| 10 European Countries with the Most Tourists | 0 | - | 4.98 | 138,720 |
| Three Band Flags of Europe | 0 | - | 4.98 | 194,842 |
| Pixelated Europe Map | 0 | - | 4.88 | 123,611 |
| Monarchies of Europe | 0 | - | 4.90 | 99,025 |
| European Countries with One Border | 0 | - | 4.97 | 184,020 |
| European Countries with the Fewest Borders | 0 | - | 4.97 | 180,725 |
| European Geography By Letter - B #2 | 0 | - | 4.87 | 89,066 |
| Federal Subjects of Russia | 0 | - | 4.95 | 149,915 |
| Countries That Border Russia | 0 | - | 4.98 | 464,901 |
| Countries Formerly in Yugoslavia | 0 | - | 4.95 | 125,575 |
| History of Austria | 0 | - | 4.70 | 17,992 |
| Austria Country Quiz | 0 | - | 4.57 | 60,115 |
| Belgium Country Quiz | 0 | - | 4.72 | 72,366 |
| France Country Quiz | 0 | - | 4.70 | 135,794 |
| French Inventions | 0 | - | 4.10 | 13,933 |
| Geography of the French Empire | 0 | - | 4.45 | 27,232 |
| The French Revolution | 0 | - | 4.47 | 24,165 |
| Countries Bordering France | 0 | - | 4.83 | 405,328 |
| 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 | 49,171 |
| Countries Closest to Germany A-Z | 0 | - | 4.98 | 27,660 |
| Greece Country Quiz | 0 | - | 4.74 | 66,706 |
| The Life of Alexander the Great | 0 | - | 4.51 | 18,594 |
| Most-Mentioned Characters in the Iliad | 0 | - | 4.81 | 21,020 |
| Figures from Greek Mythology | 0 | - | 4.91 | 190,593 |
| Italy Country Quiz | 0 | - | 4.77 | 124,204 |
| Embarrassing Chapters in Italian History | 0 | - | 4.24 | 12,178 |
| Seven Hills of Rome | 0 | - | 4.70 | 9,277 |
| 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 | 90,799 |
| The Vikings! | 0 | - | 4.46 | 28,421 |
| Sweden Immigration by Country | 0 | - | 4.53 | 56,439 |
| Portugal Country Quiz | 0 | - | 4.69 | 72,410 |
| The Portuguese Empire | 0 | - | 4.58 | 12,117 |
| Spain Country Quiz | 0 | - | 4.44 | 129,385 |
| Switzerland Country Quiz | 0 | - | 4.52 | 63,717 |
| Counties of England Map Quiz | 0 | - | 4.97 | 309,264 |
| United Kingdom A-Z | 0 | - | 4.51 | 88,443 |
| Largest Islands in the British Isles With a Map | 0 | - | 4.52 | 38,881 |
| British Geography Multiple Choice | 0 | - | 4.49 | 43,490 |
| English Royal Consorts | 0 | - | 4.38 | 37,558 |
| 10 Closest Megacities to London | 0 | - | 4.90 | 17,862 |
| Counties of Wales | 0 | - | 4.63 | 39,680 |
| U.S. Presidents Quiz | 0 | - | 5.00 | 3,730,784 |
| Deadliest U.S. Wars | 0 | - | 4.89 | 191,965 |
| Top 10 Coldest European Countries | 0 | - | 4.94 | 194,058 |
| Top 10 Hottest European Countries | 0 | - | 4.88 | 127,941 |
| Countries That Touch the Adriatic Sea | 0 | - | 4.96 | 71,400 |
| Top 10 European Countries by Coastline | 0 | - | 4.86 | 138,825 |
| 100 Longest Rivers in Europe - with a Map | 0 | - | 4.94 | 66,045 |
| Category Elimination - European Geography #1 | 0 | - | 4.98 | 236,310 |
| European Map without 10 Random Countries | 0 | - | 4.97 | 279,294 |
| Category Elimination - European Geography #2 | 0 | - | 4.99 | 169,242 |
| Category Elimination - European Countries #1 | 0 | - | 4.90 | 91,261 |
| Name a Valid European Country #1 | 0 | - | 4.99 | 265,339 |
| Name a Valid European Country #2 | 0 | - | 4.94 | 116,117 |
| Countries that Border Poland | 0 | - | 4.99 | 173,341 |
| Russia Country Quiz | 0 | - | 4.83 | 115,443 |
| Non-Bordering Countries Closest to Russia | 0 | - | 4.91 | 83,351 |
| Countries With the Most Russian Speakers | 0 | - | 4.97 | 103,248 |
| Croatia Country Quiz | 0 | - | 4.83 | 43,827 |
| Countries that Border Hungary | 0 | - | 4.98 | 105,103 |
| Bosnia and Herzegovina Country Quiz | 0 | - | 4.83 | 35,635 |
| Countries Bordering Serbia | 0 | - | 4.96 | 93,207 |
| French Geography Quiz #1 | 0 | - | 4.89 | 35,252 |
| Countries Bordering Austria | 0 | - | 4.97 | 119,041 |
| Countries that Visit France the Most | 0 | - | 4.85 | 46,212 |
| Countries Closest to Metropolitan France | 0 | - | 4.89 | 72,560 |
| Most Popular Baby Girls Names in Germany | 0 | - | 4.51 | 39,024 |
| German History A-Z | 0 | - | 4.49 | 24,945 |
| Counties of Ireland | 0 | - | 4.92 | 197,668 |
| History of Ireland | 0 | - | 4.39 | 31,483 |
| Countries Bordering Italy | 0 | - | 4.94 | 101,361 |
| Countries Italy Declared War On | 0 | - | 4.74 | 48,100 |
| Countries Closest to Italy | 0 | - | 4.97 | 199,639 |
| Byzantine History | 0 | - | 4.91 | 29,047 |
| Byzantine Emperors | 0 | - | 4.93 | 14,662 |
| Canary Islands | 0 | - | 4.62 | 17,549 |
| Biggest Spanish Empire Countries | 0 | - | 4.91 | 117,104 |
| Countries Closest to Spain | 0 | - | 4.96 | 228,371 |
