| History of France | 0 | - | 4.61 | 57,767 |
| States of the German Confederation in 1848 | 0 | - | 4.90 | 32,534 |
| Regions of France Map Quiz | 0 | - | 4.97 | 145,874 |
| Geography of the French Empire | 0 | - | 4.45 | 27,242 |
| The French Revolution | 0 | - | 4.47 | 24,175 |
| Counties of England | 0 | - | 4.97 | 804,768 |
| Wives of King Henry VIII | 0 | - | 4.55 | 53,498 |
| Countries the UK Declared War On | 0 | - | 4.55 | 123,415 |
| Geography of the British Empire | 0 | - | 4.48 | 39,890 |
| Countries of Europe in 1815 With a Map | 0 | - | 4.99 | 151,651 |
| Countries of Europe in 1848 | 0 | - | 4.98 | 86,270 |
| Countries of Europe in 1870 with a Map | 0 | - | 4.95 | 66,103 |
| Every Country of Europe Since 1815 With a Map | 0 | - | 4.97 | 72,086 |
| Countries of Europe in 1360 with a Map | 0 | - | 4.99 | 57,792 |
| States of Germany Map Quiz | 0 | - | 4.92 | 134,061 |
| States of Germany | 0 | - | 4.95 | 155,062 |
| Germany Immigration by Country | 0 | - | 4.86 | 81,861 |
| Regions of Italy | 0 | - | 4.92 | 77,324 |
| History of Italy | 0 | - | 4.55 | 32,199 |
| Geography of the Dutch Empire | 0 | - | 4.62 | 34,867 |
| Netherlands Immigration by Country | 0 | - | 4.93 | 52,972 |
| Regions of Spain Quiz | 0 | - | 4.91 | 115,687 |
| Countries of the Spanish Empire | 0 | - | 4.52 | 77,483 |
| Cantons of Switzerland | 0 | - | 4.98 | 51,963 |
| Countries and Territories of the United Kingdom | 0 | - | 4.90 | 94,698 |
| Invasions of Great Britain | 0 | - | 4.51 | 60,157 |
| 10 Closest Megacities to London | 0 | - | 4.90 | 17,879 |
| Europe Map Quiz | 0 | - | 5.00 | 4,795,361 |
| Regions of France | 0 | - | 4.70 | 122,517 |
| France Immigration by Country | 0 | - | 4.70 | 77,043 |
| Countries Bordering France | 0 | - | 4.83 | 405,514 |
| French History Multiple Choice | 0 | - | 4.55 | 33,285 |
| Biggest Countries in Europe in 1700 | 0 | - | 4.74 | 58,845 |
| Departments of France | 0 | - | 4.93 | 55,483 |
| History of Germany | 0 | - | 4.39 | 53,011 |
| Name the English Monarchs | 0 | - | 4.91 | 507,686 |
| Anglo-Saxon Kingdoms of England | 0 | - | 4.60 | 25,836 |
| Giant Great Britain Millennium Quiz | 0 | - | 4.78 | 20,259 |
| Anglo-Saxon and Viking Kings of England | 0 | - | 4.75 | 12,369 |
| Europe by Borders in 30 Seconds | 0 | - | 4.98 | 431,577 |
| History of Austria | 0 | - | 4.70 | 17,993 |
| French Geography Quiz #1 | 0 | - | 4.89 | 35,322 |
| Countries that Visit France the Most | 0 | - | 4.85 | 46,254 |
| Countries Closest to Metropolitan France | 0 | - | 4.89 | 72,600 |
| Biggest Cities in Germany in 1910 | 0 | - | 4.41 | 23,581 |
| The Vikings! | 0 | - | 4.46 | 28,433 |
| The Portuguese Empire | 0 | - | 4.58 | 12,120 |
| French Inventions | 0 | - | 4.10 | 13,933 |
| Country Quiz on a Map - France | 0 | - | 4.98 | 47,849 |
| History of Paris | 0 | - | 4.24 | 13,687 |
| Embarrassing Chapters in French History | 0 | - | 3.65 | 20,178 |
| The Trojan War | 0 | - | 4.83 | 40,124 |
| Letters of the Greek Alphabet | 0 | - | 4.97 | 653,380 |
| Name that Greek Letter | 0 | - | 4.93 | 325,408 |
| Greek Mythology General Knowledge #1 | 0 | - | 4.85 | 113,362 |
| Ancient Roman Trivia #1 | 0 | - | 4.85 | 85,732 |
| Roman Emperors | 0 | - | 4.95 | 121,525 |
| Malta Country Quiz | 0 | - | 4.81 | 31,277 |
| Countries That Use the Euro | 0 | - | 4.95 | 107,385 |
| Europe Cities Map Quiz | 0 | - | 4.99 | 366,713 |
| 10 Easternmost Countries in Europe | 0 | - | 4.87 | 117,613 |
| The Only European Country ... | 0 | - | 4.91 | 219,780 |
| European Countries NOT in NATO | 0 | - | 4.91 | 62,931 |
| History of Russia Quiz | 0 | - | 4.47 | 32,032 |
| 101 Figures from Greek Mythology | 0 | - | 4.99 | 128,121 |
| History of The Netherlands | 0 | - | 4.46 | 17,581 |
| Former Dominions of the British Empire | 0 | - | 4.27 | 24,290 |
| Flags of Europe Quiz | 0 | - | 4.99 | 1,262,591 |
| Countries of Europe - One Minute Sprint | 0 | - | 4.94 | 1,337,776 |
| 10 Biggest European Countries by Area | 0 | - | 4.99 | 193,856 |
| 10 Westernmost Countries in Europe | 0 | - | 4.96 | 152,597 |
| Top 10 Languages Spoken in Europe | 0 | - | 4.96 | 221,453 |
| European Landmarks Map Quiz | 0 | - | 4.97 | 87,959 |
| Countries of Europe with an Empty Map | 0 | - | 5.00 | 313,350 |
| All First-Level Subdivisions of Europe on a Map | 0 | - | 4.99 | 176,785 |
| Countries with Territory in the Balkans | 0 | - | 4.96 | 90,442 |
| Eastern Europe Map Quiz | 0 | - | 4.91 | 128,965 |
| Slavic Countries | 0 | - | 4.96 | 112,568 |
| Germany Multiple Choice | 0 | - | 4.84 | 54,775 |
| Olympian Gods Quiz | 0 | - | 4.96 | 504,737 |
| Ancient Greek Words | 0 | - | 4.93 | 112,740 |
| History of Spain | 0 | - | 4.23 | 21,179 |
| "Big Five" European Soccer Champions Since 2000 | 0 | - | 4.97 | 363,076 |
| The Reign of Napoleon | 0 | - | 4.54 | 39,242 |
| States of the Holy Roman Empire in 1356 | 0 | - | 4.97 | 75,678 |
| Largest Islands of Greece | 0 | - | 4.59 | 48,620 |
| Roman Numeral Decoding Quiz | 0 | - | 4.94 | 440,682 |
| Two Letter Roman Numerals | 0 | - | 4.97 | 56,661 |
| Provinces of the Netherlands | 0 | - | 4.80 | 41,980 |
| 100 Greatest Britons Quiz | 0 | - | 4.41 | 48,519 |
| Foods in a Full English Breakfast | 0 | - | 4.46 | 103,999 |
| The UK for Americans - True or False | 0 | - | 4.43 | 58,863 |
| Champions League Winners | 0 | - | 4.92 | 1,018,679 |
| European Geography By Letter - P #1 | 0 | - | 4.81 | 99,273 |
| European Diaspora - Top 11 Countries | 0 | - | 4.88 | 97,040 |
| 10 European Countries with the Most Tourists | 0 | - | 4.98 | 138,808 |
| Three Band Flags of Europe | 0 | - | 4.98 | 194,971 |
| Pixelated Europe Map | 0 | - | 4.88 | 123,726 |
| Monarchies of Europe | 0 | - | 4.90 | 99,093 |
| European Countries with One Border | 0 | - | 4.97 | 184,110 |
| European Countries with the Fewest Borders | 0 | - | 4.97 | 180,828 |
| European Geography By Letter - B #2 | 0 | - | 4.87 | 89,333 |
| Federal Subjects of Russia | 0 | - | 4.95 | 150,044 |
| Countries That Border Russia | 0 | - | 4.98 | 465,101 |
| Countries Formerly in Yugoslavia | 0 | - | 4.95 | 125,633 |
| France Country Quiz | 0 | - | 4.70 | 135,863 |
| Movies Set in France | 0 | - | 4.26 | 13,165 |
| Kings of France Quiz | 0 | - | 4.22 | 32,978 |
| Countries Bordering Germany | 0 | - | 4.99 | 372,382 |
| Embarrassing Chapters in Italian History | 0 | - | 4.24 | 12,187 |
| American to British Word Translation | 0 | - | 4.14 | 139,879 |
| Languages of the United Kingdom | 0 | - | 4.14 | 41,101 |
| Counties of England Map Quiz | 0 | - | 4.97 | 309,369 |
| British Geography Multiple Choice | 0 | - | 4.49 | 43,511 |
| Modern-Day Countries of the Holy Roman Empire on a Map | 0 | - | 4.93 | 46,014 |
| Top 10 Coldest European Countries | 0 | - | 4.94 | 194,145 |
| Top 10 Hottest European Countries | 0 | - | 4.88 | 128,039 |
| Category Elimination - European Geography #1 | 0 | - | 4.98 | 236,506 |
| European Map without 10 Random Countries | 0 | - | 4.97 | 279,473 |
| Category Elimination - European Geography #2 | 0 | - | 4.99 | 169,404 |
| Name a Valid European Country #1 | 0 | - | 4.99 | 265,655 |
| Name a Valid European Country #2 | 0 | - | 4.94 | 116,206 |
| Russia Country Quiz | 0 | - | 4.83 | 115,517 |
| Croatia Country Quiz | 0 | - | 4.83 | 43,871 |
| Bosnia and Herzegovina Country Quiz | 0 | - | 4.85 | 35,674 |
| Andorra Country Quiz | 0 | - | 4.91 | 32,024 |
| France Cities Map Quiz | 0 | - | 4.96 | 168,104 |
| Germany Country Quiz | 0 | - | 4.82 | 159,162 |
| Germany Cities Map Quiz | 0 | - | 4.87 | 127,314 |
| Ancient Greek Trivia | 0 | - | 4.62 | 67,303 |
| Geography of Ancient Greece | 0 | - | 4.69 | 32,081 |
| Most-Mentioned Characters in the Iliad | 0 | - | 4.81 | 21,092 |
| Figures from Greek Mythology | 0 | - | 4.92 | 194,588 |
| Regions of Italy Map Quiz | 0 | - | 4.96 | 150,504 |
| Italy Cities Map Quiz | 0 | - | 4.97 | 153,298 |
| Countries Italy Declared War On | 0 | - | 4.77 | 50,326 |
| Countries Surrounding Rome | 0 | - | 4.97 | 49,796 |
| Byzantine History | 0 | - | 4.91 | 29,066 |
| Byzantine Emperors | 0 | - | 4.93 | 14,673 |
| Spain Cities Map Quiz | 0 | - | 4.87 | 97,660 |
| Regions of Spain Map Quiz | 0 | - | 4.95 | 187,096 |
| Canary Islands | 0 | - | 4.62 | 17,551 |
| Switzerland Immigration by Country | 0 | - | 4.69 | 30,192 |
| British Spellings | 0 | - | 4.06 | 99,642 |
| British Groups of Things | 0 | - | 4.26 | 83,050 |
| British Acronyms | 0 | - | 4.40 | 45,995 |
| United Kingdom Decoder | 0 | - | 4.29 | 40,136 |
| Biggest Immigrant Groups by Decade in the UK | 0 | - | 4.63 | 25,897 |
| Modern-Day Countries of the British Empire in 1921 | 0 | - | 4.99 | 119,135 |
| English Monarchs in Order by First Letter | 0 | - | 4.38 | 32,242 |
| Geography of Scotland | 0 | - | 4.63 | 21,841 |
| Medieval English History | 0 | - | 4.53 | 43,700 |
| England or Wales? | 0 | - | 4.94 | 46,094 |
| All UEFA Champions League Teams Ever | 0 | - | 4.85 | 132,613 |
| Countries of the Mongol Empire on a Map | 0 | - | 4.99 | 107,760 |
| U.S. Presidents Quiz | 0 | - | 5.00 | 3,733,261 |
| Deadliest U.S. Wars | 0 | - | 4.89 | 192,097 |
| Countries That Touch the Adriatic Sea | 0 | - | 4.96 | 71,420 |
| European Countries with the Fewest Overnight Visitors | 0 | - | 4.80 | 41,743 |
| Top 10 European Countries by Coastline | 0 | - | 4.86 | 138,855 |
| Top 20 Football Clubs in Europe | 0 | - | 4.48 | 124,677 |
| 100 Longest Rivers in Europe - with a Map | 0 | - | 4.94 | 66,093 |
| Category Elimination - European Countries #1 | 0 | - | 4.90 | 91,338 |
| The Only Remaining European Country . . . | 0 | - | 4.41 | 64,817 |
| Countries that Border Poland | 0 | - | 4.99 | 173,407 |
| Non-Bordering Countries Closest to Russia | 0 | - | 4.91 | 83,380 |
| Countries that Beat Russia | 0 | - | 4.81 | 83,808 |
| Countries With the Most Russian Speakers | 0 | - | 4.97 | 103,473 |
| Countries that Border Hungary | 0 | - | 4.98 | 105,133 |
| North Macedonia Country Quiz | 0 | - | 4.81 | 28,102 |
| Moldova Country Quiz | 0 | - | 4.82 | 31,085 |
| Countries Bordering Serbia | 0 | - | 4.96 | 93,256 |
| Countries Bordering Austria | 0 | - | 4.97 | 119,084 |
| 20 Questions About France | 0 | - | 4.11 | 32,488 |
| Countries that Beat France | 0 | - | 4.48 | 76,539 |
| France True or False? | 0 | - | 4.44 | 40,123 |
| Geography of Germany | 0 | - | 4.36 | 17,452 |
| Countries that Beat Germany | 0 | - | 4.94 | 107,572 |
| Countries With the Most German Speakers | 0 | - | 4.89 | 99,307 |
| Country Quiz on a Map - Germany | 0 | - | 4.95 | 35,696 |
| Greek Mythology General Knowledge #2 | 0 | - | 4.59 | 74,547 |
| Ancient Greece - Multiple Choice | 0 | - | 4.54 | 41,909 |
| Counties of Ireland | 0 | - | 4.92 | 197,791 |
| Countries Bordering Italy | 0 | - | 4.94 | 101,406 |
| Countries that Beat Italy | 0 | - | 4.85 | 55,337 |
| Countries Closest to Italy | 0 | - | 4.97 | 199,799 |
| Ancient Roman Trivia #2 | 0 | - | 4.61 | 44,417 |
| Geography of the Roman Empire | 0 | - | 4.55 | 52,283 |
| Roman Names for Places | 0 | - | 4.62 | 58,819 |
| Countries Closest to Iceland | 0 | - | 4.90 | 74,351 |
| Countries that Beat Portugal | 0 | - | 4.86 | 60,043 |
| Geography of the Spanish Empire | 0 | - | 4.49 | 37,339 |
| Countries Closest to Spain | 0 | - | 4.96 | 228,477 |
| Countries that Beat Spain | 0 | - | 4.94 | 63,467 |
| Real Madrid 2010s Starting XI | 0 | - | 4.90 | 69,183 |
| British to American Word Translation | 0 | - | 3.74 | 255,414 |
| British Foods by Description | 0 | - | 3.94 | 48,419 |
| British and American Word Differences | 0 | - | 2.63 | 46,943 |
| The United States... or the United Kingdom? | 0 | - | 4.87 | 99,234 |
| British Geography Quiz #2 | 0 | - | 4.30 | 28,263 |
