| History of France | 0 | - | 4.61 | 57,340 |
| States of the German Confederation in 1848 | 0 | - | 4.90 | 32,247 |
| Regions of France Map Quiz | 0 | - | 4.97 | 144,959 |
| Geography of the French Empire | 0 | - | 4.45 | 27,167 |
| The French Revolution | 0 | - | 4.47 | 24,076 |
| Counties of England | 0 | - | 4.97 | 799,728 |
| Wives of King Henry VIII | 0 | - | 4.55 | 53,423 |
| Countries the UK Declared War On | 0 | - | 4.55 | 122,967 |
| Geography of the British Empire | 0 | - | 4.48 | 39,767 |
| Countries of Europe in 1815 With a Map | 0 | - | 4.99 | 150,849 |
| Countries of Europe in 1848 | 0 | - | 4.98 | 83,865 |
| Countries of Europe in 1870 with a Map | 0 | - | 4.95 | 65,214 |
| Every Country of Europe Since 1815 With a Map | 0 | - | 4.98 | 71,420 |
| Countries of Europe in 1360 with a Map | 0 | - | 4.99 | 57,219 |
| States of Germany Map Quiz | 0 | - | 4.92 | 133,314 |
| States of Germany | 0 | - | 4.95 | 153,505 |
| Germany Immigration by Country | 0 | - | 4.85 | 81,356 |
| Regions of Italy | 0 | - | 4.92 | 76,405 |
| History of Italy | 0 | - | 4.55 | 32,081 |
| Geography of the Dutch Empire | 0 | - | 4.62 | 34,744 |
| Netherlands Immigration by Country | 0 | - | 4.93 | 52,508 |
| Regions of Spain Quiz | 0 | - | 4.90 | 114,633 |
| Countries of the Spanish Empire | 0 | - | 4.52 | 77,318 |
| Cantons of Switzerland | 0 | - | 4.98 | 51,472 |
| Countries and Territories of the United Kingdom | 0 | - | 4.90 | 94,227 |
| Invasions of Great Britain | 0 | - | 4.51 | 59,987 |
| 10 Closest Megacities to London | 0 | - | 4.90 | 17,771 |
| Europe Map Quiz | 0 | - | 5.00 | 4,774,103 |
| Regions of France | 0 | - | 4.70 | 121,398 |
| France Immigration by Country | 0 | - | 4.70 | 76,714 |
| Countries Bordering France | 0 | - | 4.83 | 403,798 |
| French History Multiple Choice | 0 | - | 4.55 | 33,143 |
| Anglo-Saxon and Viking Kings of England | 0 | - | 4.74 | 12,283 |
| Biggest Countries in Europe in 1700 | 0 | - | 4.73 | 58,625 |
| Departments of France | 0 | - | 4.93 | 54,596 |
| History of Germany | 0 | - | 4.39 | 52,912 |
| Name the English Monarchs | 0 | - | 4.91 | 504,439 |
| Anglo-Saxon Kingdoms of England | 0 | - | 4.60 | 25,791 |
| Giant Great Britain Millennium Quiz | 0 | - | 4.78 | 20,194 |
| Europe by Borders in 30 Seconds | 0 | - | 4.98 | 429,460 |
| History of Austria | 0 | - | 4.70 | 17,922 |
| French Geography Quiz #1 | 0 | - | 4.89 | 34,902 |
| Countries that Visit France the Most | 0 | - | 4.85 | 45,991 |
| Countries Closest to Metropolitan France | 0 | - | 4.89 | 72,310 |
| The Vikings! | 0 | - | 4.46 | 28,374 |
| The Portuguese Empire | 0 | - | 4.58 | 12,087 |
| French Inventions | 0 | - | 4.10 | 13,911 |
| Country Quiz on a Map - France | 0 | - | 4.98 | 47,424 |
| History of Paris | 0 | - | 4.24 | 13,665 |
| Embarrassing Chapters in French History | 0 | - | 3.65 | 20,144 |
| The Trojan War | 0 | - | 4.83 | 39,838 |
| Letters of the Greek Alphabet | 0 | - | 4.97 | 649,556 |
| Name that Greek Letter | 0 | - | 4.93 | 324,316 |
| Greek Mythology General Knowledge #1 | 0 | - | 4.85 | 112,375 |
| Ancient Roman Trivia #1 | 0 | - | 4.85 | 84,913 |
| Roman Emperors | 0 | - | 4.95 | 120,511 |
| Malta Country Quiz | 0 | - | 4.81 | 31,135 |
| Countries That Use the Euro | 0 | - | 4.95 | 105,796 |
| Europe Cities Map Quiz | 0 | - | 4.99 | 365,282 |
| 10 Easternmost Countries in Europe | 0 | - | 4.89 | 115,881 |
| The Only European Country ... | 0 | - | 4.91 | 217,685 |
| European Countries NOT in NATO | 0 | - | 4.90 | 61,768 |
| History of Russia Quiz | 0 | - | 4.47 | 31,968 |
| 101 Figures from Greek Mythology | 0 | - | 4.99 | 126,690 |
| History of The Netherlands | 0 | - | 4.46 | 17,499 |
| Former Dominions of the British Empire | 0 | - | 4.27 | 24,216 |
| Flags of Europe Quiz | 0 | - | 4.99 | 1,250,163 |
| Countries of Europe - One Minute Sprint | 0 | - | 4.94 | 1,331,675 |
| 10 Biggest European Countries by Area | 0 | - | 4.99 | 193,035 |
| 10 Westernmost Countries in Europe | 0 | - | 4.96 | 151,541 |
| Top 10 Languages Spoken in Europe | 0 | - | 4.96 | 219,653 |
| European Landmarks Map Quiz | 0 | - | 4.97 | 87,451 |
| Countries of Europe with an Empty Map | 0 | - | 5.00 | 311,618 |
| All First-Level Subdivisions of Europe on a Map | 0 | - | 4.98 | 173,800 |
| Countries with Territory in the Balkans | 0 | - | 4.96 | 89,682 |
| Eastern Europe Map Quiz | 0 | - | 4.91 | 128,489 |
| Slavic Countries | 0 | - | 4.96 | 111,985 |
| Biggest Cities in Germany in 1910 | 0 | - | 4.40 | 23,517 |
| Germany Multiple Choice | 0 | - | 4.84 | 54,518 |
| Olympian Gods Quiz | 0 | - | 4.96 | 502,207 |
| Ancient Greek Words | 0 | - | 4.93 | 112,026 |
| History of Spain | 0 | - | 4.23 | 21,130 |
| "Big Five" European Soccer Champions Since 2000 | 0 | - | 4.97 | 358,720 |
| The Reign of Napoleon | 0 | - | 4.54 | 39,046 |
| States of the Holy Roman Empire in 1356 | 0 | - | 4.98 | 74,730 |
| Largest Islands of Greece | 0 | - | 4.59 | 48,191 |
| Roman Numeral Decoding Quiz | 0 | - | 4.94 | 438,334 |
| Two Letter Roman Numerals | 0 | - | 4.97 | 56,314 |
| Provinces of the Netherlands | 0 | - | 4.80 | 41,539 |
| 100 Greatest Britons Quiz | 0 | - | 4.41 | 48,364 |
| Foods in a Full English Breakfast | 0 | - | 4.46 | 103,504 |
| The UK for Americans - True or False | 0 | - | 4.43 | 58,714 |
| Champions League Winners | 0 | - | 4.92 | 1,010,775 |
| European Geography By Letter - P #1 | 0 | - | 4.81 | 98,177 |
| European Diaspora - Top 11 Countries | 0 | - | 4.90 | 96,120 |
| 10 European Countries with the Most Tourists | 0 | - | 4.98 | 137,959 |
| Three Band Flags of Europe | 0 | - | 4.98 | 193,845 |
| Pixelated Europe Map | 0 | - | 4.88 | 123,068 |
| Monarchies of Europe | 0 | - | 4.90 | 98,436 |
| European Countries with One Border | 0 | - | 4.97 | 183,236 |
| European Countries with the Fewest Borders | 0 | - | 4.97 | 180,012 |
| European Geography By Letter - B #2 | 0 | - | 4.86 | 87,436 |
| Federal Subjects of Russia | 0 | - | 4.95 | 148,248 |
| Countries That Border Russia | 0 | - | 4.98 | 463,056 |
| Countries Formerly in Yugoslavia | 0 | - | 4.95 | 125,182 |
| France Country Quiz | 0 | - | 4.70 | 135,280 |
| Movies Set in France | 0 | - | 4.26 | 13,135 |
| Kings of France Quiz | 0 | - | 4.20 | 32,840 |
| Countries Bordering Germany | 0 | - | 4.99 | 370,893 |
| Embarrassing Chapters in Italian History | 0 | - | 4.24 | 12,135 |
| American to British Word Translation | 0 | - | 4.14 | 139,390 |
| Languages of the United Kingdom | 0 | - | 4.13 | 40,970 |
| Counties of England Map Quiz | 0 | - | 4.97 | 308,341 |
| British Geography Multiple Choice | 0 | - | 4.49 | 43,391 |
| Modern-Day Countries of the Holy Roman Empire on a Map | 0 | - | 4.93 | 45,780 |
| Top 10 Coldest European Countries | 0 | - | 4.94 | 193,418 |
| Top 10 Hottest European Countries | 0 | - | 4.88 | 127,345 |
| Category Elimination - European Geography #1 | 0 | - | 4.98 | 234,434 |
| European Map without 10 Random Countries | 0 | - | 4.97 | 277,660 |
| Category Elimination - European Geography #2 | 0 | - | 4.99 | 167,928 |
| Name a Valid European Country #1 | 0 | - | 4.99 | 262,718 |
| Name a Valid European Country #2 | 0 | - | 4.94 | 115,225 |
| Russia Country Quiz | 0 | - | 4.83 | 114,777 |
| Croatia Country Quiz | 0 | - | 4.83 | 43,527 |
| Bosnia and Herzegovina Country Quiz | 0 | - | 4.86 | 35,440 |
| Andorra Country Quiz | 0 | - | 4.91 | 31,809 |
| France Cities Map Quiz | 0 | - | 4.96 | 167,276 |
| Germany Country Quiz | 0 | - | 4.83 | 158,303 |
| Germany Cities Map Quiz | 0 | - | 4.87 | 126,733 |
| Ancient Greek Trivia | 0 | - | 4.62 | 67,111 |
| Geography of Ancient Greece | 0 | - | 4.69 | 31,968 |
| Most-Mentioned Characters in the Iliad | 0 | - | 4.81 | 20,864 |
| Figures from Greek Mythology | 0 | - | 4.91 | 187,931 |
| Regions of Italy Map Quiz | 0 | - | 4.96 | 149,787 |
| Italy Cities Map Quiz | 0 | - | 4.97 | 152,694 |
| Countries Italy Declared War On | 0 | - | 4.75 | 43,458 |
| Countries Surrounding Rome | 0 | - | 4.97 | 49,634 |
| Byzantine History | 0 | - | 4.91 | 28,937 |
| Byzantine Emperors | 0 | - | 4.92 | 14,411 |
| Spain Cities Map Quiz | 0 | - | 4.87 | 97,172 |
| Regions of Spain Map Quiz | 0 | - | 4.95 | 186,332 |
| Canary Islands | 0 | - | 4.62 | 17,499 |
| Switzerland Immigration by Country | 0 | - | 4.69 | 29,862 |
| British Spellings | 0 | - | 4.06 | 99,526 |
| British Groups of Things | 0 | - | 4.25 | 82,927 |
| British Acronyms | 0 | - | 4.40 | 45,868 |
| United Kingdom Decoder | 0 | - | 4.29 | 40,063 |
| Biggest Immigrant Groups by Decade in the UK | 0 | - | 4.63 | 25,450 |
| Modern-Day Countries of the British Empire in 1921 | 0 | - | 4.99 | 118,135 |
| English Monarchs in Order by First Letter | 0 | - | 4.38 | 31,987 |
| Geography of Scotland | 0 | - | 4.63 | 21,676 |
| Medieval English History | 0 | - | 4.53 | 43,589 |
| England or Wales? | 0 | - | 4.94 | 45,824 |
| All UEFA Champions League Teams Ever | 0 | - | 4.85 | 131,196 |
| Countries of the Mongol Empire on a Map | 0 | - | 4.99 | 107,156 |
| U.S. Presidents Quiz | 0 | - | 5.00 | 3,711,421 |
| Deadliest U.S. Wars | 0 | - | 4.89 | 191,342 |
| Countries That Touch the Adriatic Sea | 0 | - | 4.96 | 71,218 |
| European Countries with the Fewest Overnight Visitors | 0 | - | 4.80 | 41,678 |
| Top 10 European Countries by Coastline | 0 | - | 4.87 | 138,554 |
| Top 20 Football Clubs in Europe | 0 | - | 4.48 | 115,813 |
| 100 Longest Rivers in Europe - with a Map | 0 | - | 4.94 | 65,684 |
| Category Elimination - European Countries #1 | 0 | - | 4.90 | 90,507 |
| The Only Remaining European Country . . . | 0 | - | 4.41 | 64,455 |
| Countries that Border Poland | 0 | - | 4.99 | 172,691 |
| Non-Bordering Countries Closest to Russia | 0 | - | 4.91 | 83,019 |
| Countries that Beat Russia | 0 | - | 4.81 | 83,146 |
| Countries With the Most Russian Speakers | 0 | - | 4.97 | 101,737 |
| Countries that Border Hungary | 0 | - | 4.98 | 104,482 |
| North Macedonia Country Quiz | 0 | - | 4.81 | 27,946 |
| Moldova Country Quiz | 0 | - | 4.82 | 30,911 |
| Countries Bordering Serbia | 0 | - | 4.96 | 92,727 |
| Countries Bordering Austria | 0 | - | 4.97 | 118,714 |
| 20 Questions About France | 0 | - | 4.11 | 32,435 |
| Countries that Beat France | 0 | - | 4.49 | 76,071 |
| France True or False? | 0 | - | 4.44 | 39,996 |
| Geography of Germany | 0 | - | 4.35 | 17,216 |
| Countries that Beat Germany | 0 | - | 4.94 | 106,825 |
| Countries With the Most German Speakers | 0 | - | 4.89 | 97,569 |
| Country Quiz on a Map - Germany | 0 | - | 4.95 | 35,268 |
| Greek Mythology General Knowledge #2 | 0 | - | 4.59 | 73,983 |
| Ancient Greece - Multiple Choice | 0 | - | 4.54 | 41,741 |
| Counties of Ireland | 0 | - | 4.92 | 196,262 |
| Countries Bordering Italy | 0 | - | 4.94 | 101,059 |
| Countries that Beat Italy | 0 | - | 4.85 | 54,702 |
| Countries Closest to Italy | 0 | - | 4.97 | 198,451 |
| Ancient Roman Trivia #2 | 0 | - | 4.57 | 41,244 |
| Geography of the Roman Empire | 0 | - | 4.56 | 52,035 |
| Roman Names for Places | 0 | - | 4.62 | 58,476 |
| Countries Closest to Iceland | 0 | - | 4.90 | 73,797 |
| Countries that Beat Portugal | 0 | - | 4.86 | 59,580 |
| Geography of the Spanish Empire | 0 | - | 4.49 | 37,245 |
| Countries Closest to Spain | 0 | - | 4.96 | 227,487 |
| Countries that Beat Spain | 0 | - | 4.94 | 63,126 |
| British to American Word Translation | 0 | - | 3.74 | 255,202 |
| British Foods by Description | 0 | - | 3.94 | 48,348 |
| British and American Word Differences | 0 | - | 2.63 | 46,904 |
| The United States... or the United Kingdom? | 0 | - | 4.87 | 98,802 |
| British Geography Quiz #2 | 0 | - | 4.29 | 28,064 |
| Counties of the UK and Ireland | 0 | - | 4.98 | 131,440 |
