| States of the German Confederation in 1848 | 0 | - | 4.89 | 31,706 |
| Regions of France Map Quiz | 0 | - | 4.97 | 143,637 |
| Geography of the French Empire | 0 | - | 4.45 | 26,983 |
| The French Revolution | 0 | - | 4.46 | 23,848 |
| Counties of England | 0 | - | 4.97 | 791,809 |
| Wives of King Henry VIII | 0 | - | 4.55 | 53,254 |
| Countries the UK Declared War On | 0 | - | 4.61 | 122,042 |
| Geography of the British Empire | 0 | - | 4.48 | 39,564 |
| Countries of Europe in 1815 With a Map | 0 | - | 4.99 | 149,407 |
| Countries of Europe in 1848 | 0 | - | 4.98 | 75,759 |
| Countries of Europe in 1870 with a Map | 0 | - | 4.95 | 63,864 |
| Every Country of Europe Since 1815 With a Map | 0 | - | 4.98 | 70,409 |
| Countries of Europe in 1360 with a Map | 0 | - | 4.99 | 56,291 |
| States of Germany Map Quiz | 0 | - | 4.91 | 132,076 |
| States of Germany | 0 | - | 4.96 | 150,876 |
| Germany Immigration by Country | 0 | - | 4.85 | 80,282 |
| Regions of Italy | 0 | - | 4.92 | 75,055 |
| History of Italy | 0 | - | 4.55 | 31,879 |
| Geography of the Dutch Empire | 0 | - | 4.62 | 34,545 |
| Netherlands Immigration by Country | 0 | - | 4.94 | 44,044 |
| Regions of Spain Quiz | 0 | - | 4.90 | 113,007 |
| Countries of the Spanish Empire | 0 | - | 4.52 | 77,070 |
| Cantons of Switzerland | 0 | - | 4.98 | 50,641 |
| Countries and Territories of the United Kingdom | 0 | - | 4.89 | 93,267 |
| Invasions of Great Britain | 0 | - | 4.51 | 59,684 |
| 10 Closest Megacities to London | 0 | - | 4.90 | 17,605 |
| Europe Map Quiz | 0 | - | 5.00 | 4,742,323 |
| Regions of France | 0 | - | 4.78 | 119,758 |
| France Immigration by Country | 0 | - | 4.72 | 76,137 |
| Countries Bordering France | 0 | - | 4.83 | 400,836 |
| French History Multiple Choice | 0 | - | 4.55 | 32,930 |
| Anglo-Saxon and Viking Kings of England | 0 | - | 4.74 | 12,140 |
| Biggest Countries in Europe in 1700 | 0 | - | 4.73 | 58,267 |
| Departments of France | 0 | - | 4.93 | 53,163 |
| History of Germany | 0 | - | 4.39 | 52,699 |
| Name the English Monarchs | 0 | - | 4.92 | 499,595 |
| Anglo-Saxon Kingdoms of England | 0 | - | 4.60 | 25,718 |
| Giant Great Britain Millennium Quiz | 0 | - | 4.78 | 20,105 |
| Europe by Borders in 30 Seconds | 0 | - | 4.98 | 426,219 |
| History of Austria | 0 | - | 4.70 | 17,791 |
| French Geography Quiz #1 | 0 | - | 4.89 | 34,611 |
| Countries that Visit France the Most | 0 | - | 4.85 | 45,669 |
| Countries Closest to Metropolitan France | 0 | - | 4.89 | 71,944 |
| Biggest Cities in Germany in 1910 | 0 | - | 4.41 | 23,417 |
| The Vikings! | 0 | - | 4.46 | 28,276 |
| The Portuguese Empire | 0 | - | 4.58 | 12,019 |
| French Inventions | 0 | - | 4.08 | 13,873 |
| Country Quiz on a Map - France | 0 | - | 4.98 | 46,808 |
| History of Paris | 0 | - | 4.24 | 13,628 |
| Embarrassing Chapters in French History | 0 | - | 3.65 | 20,063 |
| The Trojan War | 0 | - | 4.83 | 39,534 |
| Letters of the Greek Alphabet | 0 | - | 4.97 | 643,990 |
| Name that Greek Letter | 0 | - | 4.93 | 322,323 |
| Greek Mythology General Knowledge #1 | 0 | - | 4.85 | 111,033 |
| Ancient Roman Trivia #1 | 0 | - | 4.85 | 84,227 |
| Roman Emperors | 0 | - | 4.95 | 119,044 |
| Malta Country Quiz | 0 | - | 4.81 | 30,908 |
| Countries That Use the Euro | 0 | - | 4.95 | 103,715 |
| Europe Cities Map Quiz | 0 | - | 4.99 | 363,028 |
| 10 Easternmost Countries in Europe | 0 | - | 4.89 | 114,149 |
| The Only European Country ... | 0 | - | 4.91 | 214,853 |
| European Countries NOT in NATO | 0 | - | 4.87 | 60,139 |
| History of Russia Quiz | 0 | - | 4.49 | 31,829 |
| 101 Figures from Greek Mythology | 0 | - | 4.99 | 124,918 |
| History of The Netherlands | 0 | - | 4.46 | 17,351 |
| Former Dominions of the British Empire | 0 | - | 4.27 | 24,123 |
| Flags of Europe Quiz | 0 | - | 4.99 | 1,232,878 |
| Countries of Europe - One Minute Sprint | 0 | - | 4.94 | 1,322,606 |
| 10 Biggest European Countries by Area | 0 | - | 4.99 | 192,040 |
| 10 Westernmost Countries in Europe | 0 | - | 4.96 | 150,622 |
| Top 10 Languages Spoken in Europe | 0 | - | 4.96 | 217,139 |
| European Landmarks Map Quiz | 0 | - | 4.97 | 86,698 |
| Countries of Europe with an Empty Map | 0 | - | 5.00 | 309,048 |
| All First-Level Subdivisions of Europe on a Map | 0 | - | 4.98 | 169,149 |
| Countries with Territory in the Balkans | 0 | - | 4.96 | 88,624 |
| Eastern Europe Map Quiz | 0 | - | 4.91 | 127,427 |
| Slavic Countries | 0 | - | 4.96 | 111,152 |
| Germany Multiple Choice | 0 | - | 4.84 | 54,163 |
| Olympian Gods Quiz | 0 | - | 4.96 | 497,878 |
| Ancient Greek Words | 0 | - | 4.93 | 111,016 |
| History of Spain | 0 | - | 4.29 | 21,035 |
| "Big Five" European Soccer Champions Since 2000 | 0 | - | 4.97 | 352,048 |
| The Reign of Napoleon | 0 | - | 4.54 | 38,803 |
| States of the Holy Roman Empire in 1356 | 0 | - | 4.97 | 72,993 |
| Largest Islands of Greece | 0 | - | 4.59 | 47,670 |
| Roman Numeral Decoding Quiz | 0 | - | 4.94 | 434,797 |
| Two Letter Roman Numerals | 0 | - | 4.97 | 55,783 |
| Provinces of the Netherlands | 0 | - | 4.80 | 41,003 |
| 100 Greatest Britons Quiz | 0 | - | 4.41 | 48,127 |
| Foods in a Full English Breakfast | 0 | - | 4.46 | 102,762 |
| The UK for Americans - True or False | 0 | - | 4.43 | 58,480 |
| Champions League Winners | 0 | - | 4.92 | 999,822 |
| European Geography By Letter - P #1 | 0 | - | 4.81 | 96,578 |
| European Diaspora - Top 11 Countries | 0 | - | 4.90 | 95,268 |
| 10 European Countries with the Most Tourists | 0 | - | 4.98 | 136,797 |
| Three Band Flags of Europe | 0 | - | 4.98 | 192,356 |
| Pixelated Europe Map | 0 | - | 4.88 | 122,145 |
| Monarchies of Europe | 0 | - | 4.90 | 97,609 |
| European Countries with One Border | 0 | - | 4.97 | 182,008 |
| European Countries with the Fewest Borders | 0 | - | 4.97 | 178,887 |
| European Geography By Letter - B #2 | 0 | - | 4.84 | 76,605 |
| Federal Subjects of Russia | 0 | - | 4.94 | 144,985 |
| Countries That Border Russia | 0 | - | 4.98 | 460,060 |
| Countries Formerly in Yugoslavia | 0 | - | 4.95 | 124,450 |
| France Country Quiz | 0 | - | 4.70 | 134,400 |
| Movies Set in France | 0 | - | 4.26 | 13,093 |
| Kings of France Quiz | 0 | - | 4.20 | 32,613 |
| Countries Bordering Germany | 0 | - | 4.99 | 367,794 |
| Embarrassing Chapters in Italian History | 0 | - | 4.24 | 12,063 |
| American to British Word Translation | 0 | - | 4.13 | 137,988 |
| Languages of the United Kingdom | 0 | - | 4.13 | 40,791 |
| Counties of England Map Quiz | 0 | - | 4.97 | 306,512 |
| British Geography Multiple Choice | 0 | - | 4.49 | 43,250 |
| Modern-Day Countries of the Holy Roman Empire on a Map | 0 | - | 4.93 | 45,395 |
| Countries of the Mongol Empire on a Map | 0 | - | 4.99 | 106,222 |
| Top 10 Coldest European Countries | 0 | - | 4.94 | 192,533 |
| Top 10 Hottest European Countries | 0 | - | 4.89 | 126,413 |
| Category Elimination - European Geography #1 | 0 | - | 4.98 | 231,501 |
| European Map without 10 Random Countries | 0 | - | 4.97 | 275,449 |
| Category Elimination - European Geography #2 | 0 | - | 4.99 | 165,892 |
| Name a Valid European Country #1 | 0 | - | 4.99 | 258,227 |
| Name a Valid European Country #2 | 0 | - | 4.94 | 113,740 |
| Russia Country Quiz | 0 | - | 4.85 | 113,958 |
| Croatia Country Quiz | 0 | - | 4.83 | 43,030 |
| Bosnia and Herzegovina Country Quiz | 0 | - | 4.86 | 35,156 |
| France Cities Map Quiz | 0 | - | 4.96 | 165,599 |
| Germany Country Quiz | 0 | - | 4.82 | 157,041 |
| Germany Cities Map Quiz | 0 | - | 4.87 | 125,477 |
| Ancient Greek Trivia | 0 | - | 4.62 | 66,850 |
| Geography of Ancient Greece | 0 | - | 4.69 | 31,825 |
| Figures from Greek Mythology | 0 | - | 4.91 | 185,639 |
| Italy Country Quiz | 0 | - | 4.82 | 122,580 |
| Regions of Italy Map Quiz | 0 | - | 4.96 | 148,736 |
| Italy Cities Map Quiz | 0 | - | 4.97 | 151,386 |
| Countries Italy Declared War On | 0 | - | 4.75 | 43,111 |
| Countries Surrounding Rome | 0 | - | 4.97 | 49,418 |
| Byzantine History | 0 | - | 4.91 | 28,678 |
| Spain Cities Map Quiz | 0 | - | 4.87 | 96,334 |
| Regions of Spain Map Quiz | 0 | - | 4.95 | 184,954 |
| Canary Islands | 0 | - | 4.61 | 17,428 |
| Switzerland Immigration by Country | 0 | - | 4.70 | 29,328 |
| British Spellings | 0 | - | 4.07 | 99,337 |
| British Groups of Things | 0 | - | 4.25 | 82,752 |
| British Acronyms | 0 | - | 4.39 | 45,682 |
| United Kingdom Decoder | 0 | - | 4.29 | 39,985 |
| Biggest Immigrant Groups by Decade in the UK | 0 | - | 4.63 | 24,725 |
| Modern-Day Countries of the British Empire in 1921 | 0 | - | 4.99 | 116,718 |
| Geography of Scotland | 0 | - | 4.63 | 21,525 |
| Medieval English History | 0 | - | 4.53 | 43,375 |
| England or Wales? | 0 | - | 4.94 | 45,453 |
| All UEFA Champions League Teams Ever | 0 | - | 4.85 | 129,087 |
| U.S. Presidents Quiz | 0 | - | 5.00 | 3,669,890 |
| Deadliest U.S. Wars | 0 | - | 4.89 | 189,645 |
| Countries That Touch the Adriatic Sea | 0 | - | 4.96 | 70,894 |
| European Countries with the Fewest Overnight Visitors | 0 | - | 4.78 | 41,622 |
| Top 10 European Countries by Coastline | 0 | - | 4.87 | 138,043 |
| Top 20 Football Clubs in Europe | 0 | - | 4.48 | 113,691 |
| 100 Longest Rivers in Europe - with a Map | 0 | - | 4.94 | 65,065 |
| Category Elimination - European Countries #1 | 0 | - | 4.89 | 89,366 |
| The Only Remaining European Country . . . | 0 | - | 4.41 | 63,942 |
| Countries that Border Poland | 0 | - | 4.99 | 171,699 |
| Non-Bordering Countries Closest to Russia | 0 | - | 4.91 | 82,524 |
| Countries that Beat Russia | 0 | - | 4.81 | 82,183 |
| Countries With the Most Russian Speakers | 0 | - | 4.97 | 99,316 |
| Countries that Border Hungary | 0 | - | 4.98 | 103,889 |
| North Macedonia Country Quiz | 0 | - | 4.81 | 27,704 |
| Moldova Country Quiz | 0 | - | 4.81 | 30,635 |
| Countries Bordering Serbia | 0 | - | 4.96 | 92,001 |
| Andorra Country Quiz | 0 | - | 4.90 | 31,499 |
| Countries Bordering Austria | 0 | - | 4.97 | 117,979 |
| 20 Questions About France | 0 | - | 4.11 | 32,356 |
| Countries that Beat France | 0 | - | 4.49 | 75,379 |
| France True or False? | 0 | - | 4.43 | 39,842 |
| Geography of Germany | 0 | - | 4.35 | 17,125 |
| Countries that Beat Germany | 0 | - | 4.95 | 105,742 |
| Countries With the Most German Speakers | 0 | - | 4.89 | 95,170 |
| Country Quiz on a Map - Germany | 0 | - | 4.95 | 34,680 |
| Greek Mythology General Knowledge #2 | 0 | - | 4.59 | 73,176 |
| Ancient Greece - Multiple Choice | 0 | - | 4.54 | 41,518 |
| Counties of Ireland | 0 | - | 4.92 | 193,808 |
| Countries Bordering Italy | 0 | - | 4.94 | 100,602 |
| Countries that Beat Italy | 0 | - | 4.85 | 54,078 |
| Countries Closest to Italy | 0 | - | 4.97 | 196,790 |
| Ancient Roman Trivia #2 | 0 | - | 4.57 | 38,603 |
| Geography of the Roman Empire | 0 | - | 4.56 | 51,758 |
| Roman Names for Places | 0 | - | 4.62 | 58,015 |
| Countries Closest to Iceland | 0 | - | 4.89 | 73,081 |
| Countries that Beat Portugal | 0 | - | 4.86 | 58,899 |
| Geography of the Spanish Empire | 0 | - | 4.49 | 37,068 |
| Countries Closest to Spain | 0 | - | 4.96 | 226,109 |
| Countries that Beat Spain | 0 | - | 4.94 | 62,621 |
| British to American Word Translation | 0 | - | 3.74 | 254,874 |
| British Foods by Description | 0 | - | 3.94 | 48,283 |
| British and American Word Differences | 0 | - | 2.64 | 46,812 |
| The United States... or the United Kingdom? | 0 | - | 4.87 | 98,048 |
| British Geography Quiz #2 | 0 | - | 4.29 | 27,537 |
| Counties of the UK and Ireland | 0 | - | 4.98 | 129,285 |
| The Reign of Queen Elizabeth I | 0 | - | 4.53 | 31,670 |
| Houses of British Monarchs | 0 | - | 4.53 | 65,427 |
| British History Multiple Choice #1 | 0 | - | 4.46 | 55,026 |
