| History of France | 0 | - | 4.61 | 57,396 |
| States of the German Confederation in 1848 | 0 | - | 4.90 | 32,282 |
| Regions of France Map Quiz | 0 | - | 4.97 | 145,054 |
| Geography of the French Empire | 0 | - | 4.45 | 27,186 |
| The French Revolution | 0 | - | 4.47 | 24,094 |
| Counties of England | 0 | - | 4.97 | 800,408 |
| Wives of King Henry VIII | 0 | - | 4.55 | 53,427 |
| Countries the UK Declared War On | 0 | - | 4.55 | 123,030 |
| Geography of the British Empire | 0 | - | 4.48 | 39,798 |
| Countries of Europe in 1815 With a Map | 0 | - | 4.99 | 150,954 |
| Countries of Europe in 1848 | 0 | - | 4.98 | 84,236 |
| Countries of Europe in 1870 with a Map | 0 | - | 4.95 | 65,337 |
| Every Country of Europe Since 1815 With a Map | 0 | - | 4.98 | 71,501 |
| Countries of Europe in 1360 with a Map | 0 | - | 4.99 | 57,288 |
| States of Germany Map Quiz | 0 | - | 4.92 | 133,409 |
| States of Germany | 0 | - | 4.95 | 153,743 |
| Germany Immigration by Country | 0 | - | 4.86 | 81,425 |
| Regions of Italy | 0 | - | 4.92 | 76,516 |
| History of Italy | 0 | - | 4.55 | 32,095 |
| Geography of the Dutch Empire | 0 | - | 4.62 | 34,760 |
| Netherlands Immigration by Country | 0 | - | 4.93 | 52,566 |
| Regions of Spain Quiz | 0 | - | 4.90 | 114,799 |
| Countries of the Spanish Empire | 0 | - | 4.52 | 77,354 |
| Cantons of Switzerland | 0 | - | 4.98 | 51,525 |
| Countries and Territories of the United Kingdom | 0 | - | 4.90 | 94,295 |
| Invasions of Great Britain | 0 | - | 4.51 | 60,013 |
| 10 Closest Megacities to London | 0 | - | 4.90 | 17,782 |
| Europe Map Quiz | 0 | - | 5.00 | 4,776,794 |
| Regions of France | 0 | - | 4.70 | 121,537 |
| France Immigration by Country | 0 | - | 4.70 | 76,773 |
| Countries Bordering France | 0 | - | 4.83 | 404,043 |
| French History Multiple Choice | 0 | - | 4.55 | 33,160 |
| Anglo-Saxon and Viking Kings of England | 0 | - | 4.74 | 12,292 |
| Biggest Countries in Europe in 1700 | 0 | - | 4.73 | 58,658 |
| Departments of France | 0 | - | 4.93 | 54,715 |
| History of Germany | 0 | - | 4.39 | 52,927 |
| Name the English Monarchs | 0 | - | 4.91 | 504,863 |
| Anglo-Saxon Kingdoms of England | 0 | - | 4.60 | 25,799 |
| Giant Great Britain Millennium Quiz | 0 | - | 4.78 | 20,203 |
| Europe by Borders in 30 Seconds | 0 | - | 4.98 | 429,819 |
| History of Austria | 0 | - | 4.70 | 17,934 |
| French Geography Quiz #1 | 0 | - | 4.89 | 34,976 |
| Countries that Visit France the Most | 0 | - | 4.85 | 46,029 |
| Countries Closest to Metropolitan France | 0 | - | 4.89 | 72,345 |
| Biggest Cities in Germany in 1910 | 0 | - | 4.41 | 23,531 |
| The Vikings! | 0 | - | 4.46 | 28,384 |
| The Portuguese Empire | 0 | - | 4.58 | 12,090 |
| French Inventions | 0 | - | 4.10 | 13,913 |
| Country Quiz on a Map - France | 0 | - | 4.98 | 47,495 |
| History of Paris | 0 | - | 4.24 | 13,665 |
| Embarrassing Chapters in French History | 0 | - | 3.65 | 20,149 |
| The Trojan War | 0 | - | 4.83 | 39,894 |
| Letters of the Greek Alphabet | 0 | - | 4.97 | 650,065 |
| Name that Greek Letter | 0 | - | 4.93 | 324,464 |
| Greek Mythology General Knowledge #1 | 0 | - | 4.85 | 112,517 |
| Ancient Roman Trivia #1 | 0 | - | 4.85 | 85,364 |
| Roman Emperors | 0 | - | 4.95 | 120,692 |
| Malta Country Quiz | 0 | - | 4.81 | 31,163 |
| Countries That Use the Euro | 0 | - | 4.95 | 106,045 |
| Europe Cities Map Quiz | 0 | - | 4.99 | 365,475 |
| 10 Easternmost Countries in Europe | 0 | - | 4.89 | 116,463 |
| The Only European Country ... | 0 | - | 4.91 | 217,992 |
| European Countries NOT in NATO | 0 | - | 4.90 | 61,979 |
| History of Russia Quiz | 0 | - | 4.47 | 31,975 |
| 101 Figures from Greek Mythology | 0 | - | 4.99 | 126,877 |
| History of The Netherlands | 0 | - | 4.46 | 17,506 |
| Former Dominions of the British Empire | 0 | - | 4.27 | 24,230 |
| Flags of Europe Quiz | 0 | - | 4.99 | 1,251,702 |
| Countries of Europe - One Minute Sprint | 0 | - | 4.94 | 1,332,474 |
| 10 Biggest European Countries by Area | 0 | - | 4.99 | 193,174 |
| 10 Westernmost Countries in Europe | 0 | - | 4.96 | 151,732 |
| Top 10 Languages Spoken in Europe | 0 | - | 4.96 | 219,928 |
| European Landmarks Map Quiz | 0 | - | 4.97 | 87,523 |
| Countries of Europe with an Empty Map | 0 | - | 5.00 | 311,854 |
| All First-Level Subdivisions of Europe on a Map | 0 | - | 4.98 | 174,329 |
| Countries with Territory in the Balkans | 0 | - | 4.96 | 89,795 |
| Eastern Europe Map Quiz | 0 | - | 4.91 | 128,552 |
| Slavic Countries | 0 | - | 4.96 | 112,078 |
| Germany Multiple Choice | 0 | - | 4.84 | 54,559 |
| Olympian Gods Quiz | 0 | - | 4.96 | 502,544 |
| Ancient Greek Words | 0 | - | 4.93 | 112,119 |
| History of Spain | 0 | - | 4.23 | 21,135 |
| "Big Five" European Soccer Champions Since 2000 | 0 | - | 4.97 | 359,362 |
| The Reign of Napoleon | 0 | - | 4.54 | 39,065 |
| States of the Holy Roman Empire in 1356 | 0 | - | 4.98 | 74,828 |
| Largest Islands of Greece | 0 | - | 4.59 | 48,268 |
| Roman Numeral Decoding Quiz | 0 | - | 4.94 | 438,630 |
| Two Letter Roman Numerals | 0 | - | 4.97 | 56,362 |
| Provinces of the Netherlands | 0 | - | 4.80 | 41,577 |
| 100 Greatest Britons Quiz | 0 | - | 4.41 | 48,371 |
| Foods in a Full English Breakfast | 0 | - | 4.46 | 103,567 |
| The UK for Americans - True or False | 0 | - | 4.43 | 58,733 |
| Champions League Winners | 0 | - | 4.92 | 1,011,854 |
| European Geography By Letter - P #1 | 0 | - | 4.81 | 98,274 |
| European Diaspora - Top 11 Countries | 0 | - | 4.90 | 96,218 |
| 10 European Countries with the Most Tourists | 0 | - | 4.98 | 138,093 |
| Three Band Flags of Europe | 0 | - | 4.98 | 194,017 |
| Pixelated Europe Map | 0 | - | 4.88 | 123,164 |
| Monarchies of Europe | 0 | - | 4.90 | 98,511 |
| European Countries with One Border | 0 | - | 4.97 | 183,364 |
| European Countries with the Fewest Borders | 0 | - | 4.97 | 180,133 |
| European Geography By Letter - B #2 | 0 | - | 4.86 | 87,710 |
| Federal Subjects of Russia | 0 | - | 4.95 | 148,473 |
| Countries That Border Russia | 0 | - | 4.98 | 463,573 |
| Countries Formerly in Yugoslavia | 0 | - | 4.95 | 125,254 |
| France Country Quiz | 0 | - | 4.70 | 135,363 |
| Movies Set in France | 0 | - | 4.26 | 13,138 |
| Kings of France Quiz | 0 | - | 4.20 | 32,859 |
| Countries Bordering Germany | 0 | - | 4.99 | 371,100 |
| Embarrassing Chapters in Italian History | 0 | - | 4.24 | 12,140 |
| American to British Word Translation | 0 | - | 4.14 | 139,464 |
| Languages of the United Kingdom | 0 | - | 4.14 | 40,995 |
| Counties of England Map Quiz | 0 | - | 4.97 | 308,462 |
| British Geography Multiple Choice | 0 | - | 4.49 | 43,404 |
| Modern-Day Countries of the Holy Roman Empire on a Map | 0 | - | 4.93 | 45,811 |
| Top 10 Coldest European Countries | 0 | - | 4.94 | 193,510 |
| Top 10 Hottest European Countries | 0 | - | 4.88 | 127,440 |
| Category Elimination - European Geography #1 | 0 | - | 4.98 | 234,762 |
| European Map without 10 Random Countries | 0 | - | 4.97 | 277,917 |
| Category Elimination - European Geography #2 | 0 | - | 4.99 | 168,142 |
| Name a Valid European Country #1 | 0 | - | 4.99 | 263,102 |
| Name a Valid European Country #2 | 0 | - | 4.94 | 115,400 |
| Russia Country Quiz | 0 | - | 4.83 | 114,855 |
| Croatia Country Quiz | 0 | - | 4.83 | 43,568 |
| Bosnia and Herzegovina Country Quiz | 0 | - | 4.86 | 35,469 |
| Andorra Country Quiz | 0 | - | 4.91 | 31,840 |
| France Cities Map Quiz | 0 | - | 4.96 | 167,389 |
| Germany Country Quiz | 0 | - | 4.83 | 158,453 |
| Germany Cities Map Quiz | 0 | - | 4.87 | 126,806 |
| Ancient Greek Trivia | 0 | - | 4.62 | 67,145 |
| Geography of Ancient Greece | 0 | - | 4.69 | 31,984 |
| Most-Mentioned Characters in the Iliad | 0 | - | 4.81 | 20,893 |
| Figures from Greek Mythology | 0 | - | 4.91 | 188,119 |
| Regions of Italy Map Quiz | 0 | - | 4.96 | 149,881 |
| Italy Cities Map Quiz | 0 | - | 4.97 | 152,768 |
| Countries Italy Declared War On | 0 | - | 4.75 | 43,512 |
| Countries Surrounding Rome | 0 | - | 4.97 | 49,666 |
| Byzantine History | 0 | - | 4.91 | 28,965 |
| Byzantine Emperors | 0 | - | 4.92 | 14,450 |
| Spain Cities Map Quiz | 0 | - | 4.87 | 97,245 |
| Regions of Spain Map Quiz | 0 | - | 4.95 | 186,455 |
| Canary Islands | 0 | - | 4.62 | 17,503 |
| Switzerland Immigration by Country | 0 | - | 4.69 | 29,915 |
| British Spellings | 0 | - | 4.06 | 99,534 |
| British Groups of Things | 0 | - | 4.25 | 82,954 |
| British Acronyms | 0 | - | 4.40 | 45,884 |
| United Kingdom Decoder | 0 | - | 4.29 | 40,076 |
| Biggest Immigrant Groups by Decade in the UK | 0 | - | 4.63 | 25,509 |
| Modern-Day Countries of the British Empire in 1921 | 0 | - | 4.99 | 118,270 |
| English Monarchs in Order by First Letter | 0 | - | 4.38 | 32,026 |
| Geography of Scotland | 0 | - | 4.63 | 21,692 |
| Medieval English History | 0 | - | 4.53 | 43,605 |
| England or Wales? | 0 | - | 4.94 | 45,851 |
| All UEFA Champions League Teams Ever | 0 | - | 4.85 | 131,391 |
| Countries of the Mongol Empire on a Map | 0 | - | 4.99 | 107,235 |
| U.S. Presidents Quiz | 0 | - | 5.00 | 3,714,789 |
| Deadliest U.S. Wars | 0 | - | 4.89 | 191,442 |
| Countries That Touch the Adriatic Sea | 0 | - | 4.96 | 71,250 |
| European Countries with the Fewest Overnight Visitors | 0 | - | 4.80 | 41,691 |
| Top 10 European Countries by Coastline | 0 | - | 4.88 | 138,581 |
| Top 20 Football Clubs in Europe | 0 | - | 4.48 | 116,021 |
| 100 Longest Rivers in Europe - with a Map | 0 | - | 4.94 | 65,719 |
| Category Elimination - European Countries #1 | 0 | - | 4.90 | 90,650 |
| The Only Remaining European Country . . . | 0 | - | 4.41 | 64,506 |
| Countries that Border Poland | 0 | - | 4.99 | 172,809 |
| Non-Bordering Countries Closest to Russia | 0 | - | 4.91 | 83,064 |
| Countries that Beat Russia | 0 | - | 4.81 | 83,248 |
| Countries With the Most Russian Speakers | 0 | - | 4.97 | 101,968 |
| Countries that Border Hungary | 0 | - | 4.98 | 104,819 |
| North Macedonia Country Quiz | 0 | - | 4.81 | 27,961 |
| Moldova Country Quiz | 0 | - | 4.82 | 30,929 |
| Countries Bordering Serbia | 0 | - | 4.96 | 92,814 |
| Countries Bordering Austria | 0 | - | 4.97 | 118,769 |
| 20 Questions About France | 0 | - | 4.11 | 32,444 |
| Countries that Beat France | 0 | - | 4.48 | 76,125 |
| France True or False? | 0 | - | 4.44 | 40,015 |
| Geography of Germany | 0 | - | 4.35 | 17,229 |
| Countries that Beat Germany | 0 | - | 4.94 | 106,944 |
| Countries With the Most German Speakers | 0 | - | 4.89 | 97,807 |
| Country Quiz on a Map - Germany | 0 | - | 4.95 | 35,354 |
| Greek Mythology General Knowledge #2 | 0 | - | 4.59 | 74,062 |
| Ancient Greece - Multiple Choice | 0 | - | 4.54 | 41,764 |
| Counties of Ireland | 0 | - | 4.92 | 196,484 |
| Countries Bordering Italy | 0 | - | 4.94 | 101,110 |
| Countries that Beat Italy | 0 | - | 4.85 | 54,884 |
| Countries Closest to Italy | 0 | - | 4.97 | 198,591 |
| Ancient Roman Trivia #2 | 0 | - | 4.60 | 43,619 |
| Geography of the Roman Empire | 0 | - | 4.56 | 52,110 |
| Roman Names for Places | 0 | - | 4.62 | 58,554 |
| Countries Closest to Iceland | 0 | - | 4.90 | 73,869 |
| Countries that Beat Portugal | 0 | - | 4.86 | 59,653 |
| Geography of the Spanish Empire | 0 | - | 4.49 | 37,265 |
| Countries Closest to Spain | 0 | - | 4.96 | 227,611 |
| Countries that Beat Spain | 0 | - | 4.94 | 63,178 |
| British to American Word Translation | 0 | - | 3.74 | 255,232 |
| British Foods by Description | 0 | - | 3.94 | 48,354 |
| British and American Word Differences | 0 | - | 2.63 | 46,910 |
| The United States... or the United Kingdom? | 0 | - | 4.87 | 98,858 |
| British Geography Quiz #2 | 0 | - | 4.29 | 28,154 |
| Counties of the UK and Ireland | 0 | - | 4.98 | 131,650 |
