| History of France | 0 | - | 4.59 | 57,278 |
| States of the German Confederation in 1848 | 0 | - | 4.90 | 32,202 |
| Regions of France Map Quiz | 0 | - | 4.97 | 144,861 |
| Geography of the French Empire | 0 | - | 4.45 | 27,156 |
| The French Revolution | 0 | - | 4.47 | 24,064 |
| Counties of England | 0 | - | 4.97 | 798,972 |
| Wives of King Henry VIII | 0 | - | 4.55 | 53,406 |
| Countries the UK Declared War On | 0 | - | 4.55 | 122,677 |
| Geography of the British Empire | 0 | - | 4.48 | 39,735 |
| Countries of Europe in 1815 With a Map | 0 | - | 4.99 | 150,765 |
| Countries of Europe in 1848 | 0 | - | 4.98 | 83,471 |
| Countries of Europe in 1870 with a Map | 0 | - | 4.95 | 65,116 |
| Every Country of Europe Since 1815 With a Map | 0 | - | 4.98 | 71,330 |
| Countries of Europe in 1360 with a Map | 0 | - | 4.99 | 57,148 |
| States of Germany Map Quiz | 0 | - | 4.92 | 133,228 |
| States of Germany | 0 | - | 4.95 | 153,228 |
| Germany Immigration by Country | 0 | - | 4.85 | 81,290 |
| Regions of Italy | 0 | - | 4.92 | 76,249 |
| History of Italy | 0 | - | 4.55 | 32,054 |
| Geography of the Dutch Empire | 0 | - | 4.61 | 34,721 |
| Netherlands Immigration by Country | 0 | - | 4.93 | 52,431 |
| Regions of Spain Quiz | 0 | - | 4.90 | 114,421 |
| Countries of the Spanish Empire | 0 | - | 4.52 | 77,299 |
| Cantons of Switzerland | 0 | - | 4.98 | 51,421 |
| Countries and Territories of the United Kingdom | 0 | - | 4.90 | 94,164 |
| Invasions of Great Britain | 0 | - | 4.51 | 59,958 |
| 10 Closest Megacities to London | 0 | - | 4.90 | 17,756 |
| Europe Map Quiz | 0 | - | 5.00 | 4,771,566 |
| Regions of France | 0 | - | 4.72 | 121,259 |
| France Immigration by Country | 0 | - | 4.70 | 76,684 |
| Countries Bordering France | 0 | - | 4.83 | 403,578 |
| French History Multiple Choice | 0 | - | 4.55 | 33,128 |
| Anglo-Saxon and Viking Kings of England | 0 | - | 4.74 | 12,270 |
| Biggest Countries in Europe in 1700 | 0 | - | 4.73 | 58,590 |
| Departments of France | 0 | - | 4.93 | 54,475 |
| History of Germany | 0 | - | 4.39 | 52,899 |
| Name the English Monarchs | 0 | - | 4.91 | 504,004 |
| Anglo-Saxon Kingdoms of England | 0 | - | 4.60 | 25,782 |
| Giant Great Britain Millennium Quiz | 0 | - | 4.78 | 20,187 |
| Europe by Borders in 30 Seconds | 0 | - | 4.98 | 429,081 |
| History of Austria | 0 | - | 4.70 | 17,906 |
| French Geography Quiz #1 | 0 | - | 4.89 | 34,858 |
| Countries that Visit France the Most | 0 | - | 4.85 | 45,969 |
| Countries Closest to Metropolitan France | 0 | - | 4.89 | 72,287 |
| The Vikings! | 0 | - | 4.46 | 28,368 |
| The Portuguese Empire | 0 | - | 4.58 | 12,083 |
| French Inventions | 0 | - | 4.10 | 13,909 |
| Country Quiz on a Map - France | 0 | - | 4.98 | 47,366 |
| History of Paris | 0 | - | 4.24 | 13,660 |
| Embarrassing Chapters in French History | 0 | - | 3.65 | 20,141 |
| The Trojan War | 0 | - | 4.83 | 39,800 |
| Letters of the Greek Alphabet | 0 | - | 4.97 | 648,935 |
| Name that Greek Letter | 0 | - | 4.93 | 324,183 |
| Greek Mythology General Knowledge #1 | 0 | - | 4.85 | 112,260 |
| Ancient Roman Trivia #1 | 0 | - | 4.85 | 84,655 |
| Roman Emperors | 0 | - | 4.95 | 120,406 |
| Malta Country Quiz | 0 | - | 4.81 | 31,117 |
| Countries That Use the Euro | 0 | - | 4.95 | 105,594 |
| Europe Cities Map Quiz | 0 | - | 4.99 | 365,061 |
| 10 Easternmost Countries in Europe | 0 | - | 4.89 | 115,705 |
| The Only European Country ... | 0 | - | 4.91 | 217,419 |
| European Countries NOT in NATO | 0 | - | 4.90 | 61,591 |
| History of Russia Quiz | 0 | - | 4.47 | 31,952 |
| 101 Figures from Greek Mythology | 0 | - | 4.99 | 126,518 |
| History of The Netherlands | 0 | - | 4.46 | 17,484 |
| Former Dominions of the British Empire | 0 | - | 4.27 | 24,213 |
| Flags of Europe Quiz | 0 | - | 4.99 | 1,248,762 |
| Countries of Europe - One Minute Sprint | 0 | - | 4.94 | 1,330,822 |
| 10 Biggest European Countries by Area | 0 | - | 4.99 | 192,937 |
| 10 Westernmost Countries in Europe | 0 | - | 4.96 | 151,444 |
| Top 10 Languages Spoken in Europe | 0 | - | 4.96 | 219,400 |
| European Landmarks Map Quiz | 0 | - | 4.97 | 87,366 |
| Countries of Europe with an Empty Map | 0 | - | 5.00 | 311,290 |
| All First-Level Subdivisions of Europe on a Map | 0 | - | 4.98 | 173,090 |
| Countries with Territory in the Balkans | 0 | - | 4.96 | 89,567 |
| Eastern Europe Map Quiz | 0 | - | 4.91 | 128,413 |
| Slavic Countries | 0 | - | 4.96 | 111,892 |
| Biggest Cities in Germany in 1910 | 0 | - | 4.40 | 23,507 |
| Germany Multiple Choice | 0 | - | 4.84 | 54,481 |
| Olympian Gods Quiz | 0 | - | 4.96 | 501,936 |
| Ancient Greek Words | 0 | - | 4.93 | 111,918 |
| History of Spain | 0 | - | 4.23 | 21,116 |
| "Big Five" European Soccer Champions Since 2000 | 0 | - | 4.97 | 358,233 |
| The Reign of Napoleon | 0 | - | 4.54 | 39,029 |
| States of the Holy Roman Empire in 1356 | 0 | - | 4.98 | 74,627 |
| Largest Islands of Greece | 0 | - | 4.59 | 48,142 |
| Roman Numeral Decoding Quiz | 0 | - | 4.94 | 438,055 |
| Two Letter Roman Numerals | 0 | - | 4.97 | 56,281 |
| Provinces of the Netherlands | 0 | - | 4.80 | 41,502 |
| 100 Greatest Britons Quiz | 0 | - | 4.41 | 48,340 |
| Foods in a Full English Breakfast | 0 | - | 4.46 | 103,445 |
| The UK for Americans - True or False | 0 | - | 4.43 | 58,694 |
| Champions League Winners | 0 | - | 4.92 | 1,009,978 |
| European Geography By Letter - P #1 | 0 | - | 4.81 | 97,939 |
| European Diaspora - Top 11 Countries | 0 | - | 4.90 | 96,054 |
| 10 European Countries with the Most Tourists | 0 | - | 4.98 | 137,863 |
| Three Band Flags of Europe | 0 | - | 4.98 | 193,729 |
| Pixelated Europe Map | 0 | - | 4.88 | 122,997 |
| Monarchies of Europe | 0 | - | 4.90 | 98,357 |
| European Countries with One Border | 0 | - | 4.97 | 183,131 |
| European Countries with the Fewest Borders | 0 | - | 4.97 | 179,905 |
| European Geography By Letter - B #2 | 0 | - | 4.86 | 86,804 |
| Federal Subjects of Russia | 0 | - | 4.95 | 148,030 |
| Countries That Border Russia | 0 | - | 4.98 | 462,852 |
| Countries Formerly in Yugoslavia | 0 | - | 4.95 | 125,103 |
| France Country Quiz | 0 | - | 4.70 | 135,193 |
| Movies Set in France | 0 | - | 4.26 | 13,134 |
| Kings of France Quiz | 0 | - | 4.20 | 32,818 |
| Countries Bordering Germany | 0 | - | 4.99 | 370,702 |
| Embarrassing Chapters in Italian History | 0 | - | 4.24 | 12,127 |
| American to British Word Translation | 0 | - | 4.14 | 139,320 |
| Languages of the United Kingdom | 0 | - | 4.13 | 40,949 |
| Counties of England Map Quiz | 0 | - | 4.97 | 308,178 |
| British Geography Multiple Choice | 0 | - | 4.49 | 43,376 |
| Modern-Day Countries of the Holy Roman Empire on a Map | 0 | - | 4.93 | 45,757 |
| Top 10 Coldest European Countries | 0 | - | 4.94 | 193,366 |
| Top 10 Hottest European Countries | 0 | - | 4.88 | 127,270 |
| Category Elimination - European Geography #1 | 0 | - | 4.98 | 233,939 |
| European Map without 10 Random Countries | 0 | - | 4.97 | 277,391 |
| Category Elimination - European Geography #2 | 0 | - | 4.99 | 167,645 |
| Name a Valid European Country #1 | 0 | - | 4.99 | 262,118 |
| Name a Valid European Country #2 | 0 | - | 4.94 | 115,052 |
| Russia Country Quiz | 0 | - | 4.83 | 114,706 |
| Croatia Country Quiz | 0 | - | 4.83 | 43,472 |
| Bosnia and Herzegovina Country Quiz | 0 | - | 4.86 | 35,415 |
| Andorra Country Quiz | 0 | - | 4.91 | 31,779 |
| France Cities Map Quiz | 0 | - | 4.96 | 167,175 |
| Germany Country Quiz | 0 | - | 4.83 | 158,191 |
| Germany Cities Map Quiz | 0 | - | 4.87 | 126,633 |
| Ancient Greek Trivia | 0 | - | 4.62 | 67,079 |
| Geography of Ancient Greece | 0 | - | 4.69 | 31,947 |
| Most-Mentioned Characters in the Iliad | 0 | - | 4.81 | 20,840 |
| Figures from Greek Mythology | 0 | - | 4.91 | 187,744 |
| Regions of Italy Map Quiz | 0 | - | 4.96 | 149,668 |
| Italy Cities Map Quiz | 0 | - | 4.97 | 152,614 |
| Countries Italy Declared War On | 0 | - | 4.75 | 43,420 |
| Countries Surrounding Rome | 0 | - | 4.97 | 49,618 |
| Byzantine History | 0 | - | 4.91 | 28,919 |
| Byzantine Emperors | 0 | - | 4.92 | 14,368 |
| Spain Cities Map Quiz | 0 | - | 4.87 | 97,122 |
| Regions of Spain Map Quiz | 0 | - | 4.95 | 186,231 |
| Canary Islands | 0 | - | 4.62 | 17,492 |
| Switzerland Immigration by Country | 0 | - | 4.69 | 29,834 |
| British Spellings | 0 | - | 4.06 | 99,509 |
| British Groups of Things | 0 | - | 4.25 | 82,913 |
| British Acronyms | 0 | - | 4.40 | 45,852 |
| United Kingdom Decoder | 0 | - | 4.29 | 40,056 |
| Biggest Immigrant Groups by Decade in the UK | 0 | - | 4.63 | 25,392 |
| Modern-Day Countries of the British Empire in 1921 | 0 | - | 4.99 | 117,992 |
| English Monarchs in Order by First Letter | 0 | - | 4.38 | 31,941 |
| Geography of Scotland | 0 | - | 4.63 | 21,659 |
| Medieval English History | 0 | - | 4.53 | 43,573 |
| England or Wales? | 0 | - | 4.94 | 45,804 |
| All UEFA Champions League Teams Ever | 0 | - | 4.85 | 131,010 |
| Countries of the Mongol Empire on a Map | 0 | - | 4.99 | 107,097 |
| U.S. Presidents Quiz | 0 | - | 5.00 | 3,708,829 |
| Deadliest U.S. Wars | 0 | - | 4.89 | 191,098 |
| Countries That Touch the Adriatic Sea | 0 | - | 4.96 | 71,191 |
| European Countries with the Fewest Overnight Visitors | 0 | - | 4.80 | 41,675 |
| Top 10 European Countries by Coastline | 0 | - | 4.87 | 138,522 |
| Top 20 Football Clubs in Europe | 0 | - | 4.48 | 115,629 |
| 100 Longest Rivers in Europe - with a Map | 0 | - | 4.94 | 65,646 |
| Category Elimination - European Countries #1 | 0 | - | 4.89 | 90,380 |
| The Only Remaining European Country . . . | 0 | - | 4.41 | 64,420 |
| Countries that Border Poland | 0 | - | 4.99 | 172,617 |
| Non-Bordering Countries Closest to Russia | 0 | - | 4.91 | 82,989 |
| Countries that Beat Russia | 0 | - | 4.81 | 83,066 |
| Countries With the Most Russian Speakers | 0 | - | 4.97 | 101,520 |
| Countries that Border Hungary | 0 | - | 4.98 | 104,432 |
| North Macedonia Country Quiz | 0 | - | 4.81 | 27,928 |
| Moldova Country Quiz | 0 | - | 4.82 | 30,884 |
| Countries Bordering Serbia | 0 | - | 4.96 | 92,673 |
| Countries Bordering Austria | 0 | - | 4.97 | 118,667 |
| 20 Questions About France | 0 | - | 4.11 | 32,432 |
| Countries that Beat France | 0 | - | 4.49 | 76,028 |
| France True or False? | 0 | - | 4.44 | 39,985 |
| Geography of Germany | 0 | - | 4.35 | 17,207 |
| Countries that Beat Germany | 0 | - | 4.94 | 106,746 |
| Countries With the Most German Speakers | 0 | - | 4.89 | 97,385 |
| Country Quiz on a Map - Germany | 0 | - | 4.95 | 35,207 |
| Greek Mythology General Knowledge #2 | 0 | - | 4.59 | 73,904 |
| Ancient Greece - Multiple Choice | 0 | - | 4.54 | 41,713 |
| Counties of Ireland | 0 | - | 4.92 | 196,075 |
| Countries Bordering Italy | 0 | - | 4.94 | 101,025 |
| Countries that Beat Italy | 0 | - | 4.85 | 54,655 |
| Countries Closest to Italy | 0 | - | 4.97 | 198,360 |
| Ancient Roman Trivia #2 | 0 | - | 4.57 | 38,793 |
| Geography of the Roman Empire | 0 | - | 4.56 | 51,993 |
| Roman Names for Places | 0 | - | 4.62 | 58,403 |
| Countries Closest to Iceland | 0 | - | 4.90 | 73,749 |
| Countries that Beat Portugal | 0 | - | 4.86 | 59,516 |
| Geography of the Spanish Empire | 0 | - | 4.49 | 37,219 |
| Countries Closest to Spain | 0 | - | 4.96 | 227,374 |
| Countries that Beat Spain | 0 | - | 4.94 | 63,070 |
| British to American Word Translation | 0 | - | 3.74 | 255,172 |
| British Foods by Description | 0 | - | 3.94 | 48,342 |
| British and American Word Differences | 0 | - | 2.63 | 46,898 |
| The United States... or the United Kingdom? | 0 | - | 4.87 | 98,746 |
| British Geography Quiz #2 | 0 | - | 4.29 | 27,631 |
| Counties of the UK and Ireland | 0 | - | 4.98 | 131,289 |
