| States of the German Confederation in 1848 | 0 | - | 4.89 | 31,706 |
| Regions of France Map Quiz | 0 | - | 4.97 | 143,636 |
| Geography of the French Empire | 0 | - | 4.45 | 26,983 |
| The French Revolution | 0 | - | 4.46 | 23,848 |
| Counties of England | 0 | - | 4.97 | 791,785 |
| Wives of King Henry VIII | 0 | - | 4.55 | 53,254 |
| Countries the UK Declared War On | 0 | - | 4.61 | 122,037 |
| Geography of the British Empire | 0 | - | 4.48 | 39,563 |
| Countries of Europe in 1815 With a Map | 0 | - | 4.99 | 149,401 |
| Countries of Europe in 1848 | 0 | - | 4.98 | 75,754 |
| Countries of Europe in 1870 with a Map | 0 | - | 4.95 | 63,860 |
| Every Country of Europe Since 1815 With a Map | 0 | - | 4.98 | 70,407 |
| Countries of Europe in 1360 with a Map | 0 | - | 4.99 | 56,288 |
| States of Germany Map Quiz | 0 | - | 4.91 | 132,070 |
| States of Germany | 0 | - | 4.96 | 150,858 |
| Germany Immigration by Country | 0 | - | 4.85 | 80,279 |
| Regions of Italy | 0 | - | 4.92 | 75,052 |
| History of Italy | 0 | - | 4.55 | 31,877 |
| Geography of the Dutch Empire | 0 | - | 4.62 | 34,545 |
| Netherlands Immigration by Country | 0 | - | 4.94 | 44,042 |
| Regions of Spain Quiz | 0 | - | 4.90 | 113,000 |
| Countries of the Spanish Empire | 0 | - | 4.52 | 77,069 |
| Cantons of Switzerland | 0 | - | 4.98 | 50,637 |
| Countries and Territories of the United Kingdom | 0 | - | 4.89 | 93,264 |
| Invasions of Great Britain | 0 | - | 4.51 | 59,682 |
| 10 Closest Megacities to London | 0 | - | 4.90 | 17,604 |
| Europe Map Quiz | 0 | - | 5.00 | 4,742,215 |
| Regions of France | 0 | - | 4.78 | 119,757 |
| France Immigration by Country | 0 | - | 4.72 | 76,136 |
| Countries Bordering France | 0 | - | 4.83 | 400,821 |
| 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 | 53,160 |
| History of Germany | 0 | - | 4.39 | 52,699 |
| Name the English Monarchs | 0 | - | 4.92 | 499,575 |
| Anglo-Saxon Kingdoms of England | 0 | - | 4.60 | 25,717 |
| Giant Great Britain Millennium Quiz | 0 | - | 4.78 | 20,105 |
| Europe by Borders in 30 Seconds | 0 | - | 4.98 | 426,211 |
| History of Austria | 0 | - | 4.70 | 17,788 |
| French Geography Quiz #1 | 0 | - | 4.89 | 34,607 |
| 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 | 46,803 |
| History of Paris | 0 | - | 4.24 | 13,628 |
| Embarrassing Chapters in French History | 0 | - | 3.65 | 20,063 |
| The Trojan War | 0 | - | 4.83 | 39,533 |
| Letters of the Greek Alphabet | 0 | - | 4.97 | 643,965 |
| Name that Greek Letter | 0 | - | 4.93 | 322,316 |
| Greek Mythology General Knowledge #1 | 0 | - | 4.85 | 111,029 |
| Ancient Roman Trivia #1 | 0 | - | 4.85 | 84,224 |
| Roman Emperors | 0 | - | 4.95 | 119,038 |
| Malta Country Quiz | 0 | - | 4.81 | 30,907 |
| Countries That Use the Euro | 0 | - | 4.95 | 103,709 |
| Europe Cities Map Quiz | 0 | - | 4.99 | 363,021 |
| 10 Easternmost Countries in Europe | 0 | - | 4.89 | 114,146 |
| The Only European Country ... | 0 | - | 4.91 | 214,838 |
| European Countries NOT in NATO | 0 | - | 4.87 | 60,134 |
| History of Russia Quiz | 0 | - | 4.49 | 31,829 |
| 101 Figures from Greek Mythology | 0 | - | 4.99 | 124,909 |
| History of The Netherlands | 0 | - | 4.46 | 17,351 |
| Former Dominions of the British Empire | 0 | - | 4.27 | 24,122 |
| Flags of Europe Quiz | 0 | - | 4.99 | 1,232,822 |
| Countries of Europe - One Minute Sprint | 0 | - | 4.94 | 1,322,564 |
| 10 Biggest European Countries by Area | 0 | - | 4.99 | 192,035 |
| 10 Westernmost Countries in Europe | 0 | - | 4.96 | 150,616 |
| Top 10 Languages Spoken in Europe | 0 | - | 4.96 | 217,130 |
| European Landmarks Map Quiz | 0 | - | 4.97 | 86,692 |
| Countries of Europe with an Empty Map | 0 | - | 5.00 | 309,040 |
| All First-Level Subdivisions of Europe on a Map | 0 | - | 4.98 | 169,136 |
| Countries with Territory in the Balkans | 0 | - | 4.96 | 88,618 |
| Eastern Europe Map Quiz | 0 | - | 4.91 | 127,426 |
| Slavic Countries | 0 | - | 4.96 | 111,147 |
| Germany Multiple Choice | 0 | - | 4.84 | 54,158 |
| Olympian Gods Quiz | 0 | - | 4.96 | 497,861 |
| Ancient Greek Words | 0 | - | 4.93 | 111,012 |
| History of Spain | 0 | - | 4.29 | 21,035 |
| "Big Five" European Soccer Champions Since 2000 | 0 | - | 4.97 | 352,024 |
| The Reign of Napoleon | 0 | - | 4.54 | 38,803 |
| States of the Holy Roman Empire in 1356 | 0 | - | 4.97 | 72,990 |
| Largest Islands of Greece | 0 | - | 4.59 | 47,670 |
| Roman Numeral Decoding Quiz | 0 | - | 4.94 | 434,785 |
| Two Letter Roman Numerals | 0 | - | 4.97 | 55,781 |
| Provinces of the Netherlands | 0 | - | 4.80 | 41,001 |
| 100 Greatest Britons Quiz | 0 | - | 4.41 | 48,126 |
| Foods in a Full English Breakfast | 0 | - | 4.46 | 102,761 |
| The UK for Americans - True or False | 0 | - | 4.43 | 58,480 |
| Champions League Winners | 0 | - | 4.92 | 999,779 |
| European Geography By Letter - P #1 | 0 | - | 4.81 | 96,574 |
| European Diaspora - Top 11 Countries | 0 | - | 4.90 | 95,262 |
| 10 European Countries with the Most Tourists | 0 | - | 4.98 | 136,786 |
| Three Band Flags of Europe | 0 | - | 4.98 | 192,352 |
| Pixelated Europe Map | 0 | - | 4.88 | 122,142 |
| Monarchies of Europe | 0 | - | 4.90 | 97,603 |
| European Countries with One Border | 0 | - | 4.97 | 182,000 |
| European Countries with the Fewest Borders | 0 | - | 4.97 | 178,883 |
| European Geography By Letter - B #2 | 0 | - | 4.84 | 76,600 |
| Federal Subjects of Russia | 0 | - | 4.94 | 144,975 |
| Countries That Border Russia | 0 | - | 4.98 | 460,049 |
| Countries Formerly in Yugoslavia | 0 | - | 4.95 | 124,445 |
| France Country Quiz | 0 | - | 4.70 | 134,392 |
| Movies Set in France | 0 | - | 4.26 | 13,093 |
| Kings of France Quiz | 0 | - | 4.20 | 32,613 |
| Countries Bordering Germany | 0 | - | 4.99 | 367,782 |
| Embarrassing Chapters in Italian History | 0 | - | 4.24 | 12,063 |
| American to British Word Translation | 0 | - | 4.13 | 137,959 |
| Languages of the United Kingdom | 0 | - | 4.13 | 40,790 |
| 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 | 45,392 |
| Countries of the Mongol Empire on a Map | 0 | - | 4.99 | 106,216 |
| Top 10 Coldest European Countries | 0 | - | 4.94 | 192,528 |
| Top 10 Hottest European Countries | 0 | - | 4.89 | 126,408 |
| Category Elimination - European Geography #1 | 0 | - | 4.98 | 231,494 |
| European Map without 10 Random Countries | 0 | - | 4.97 | 275,405 |
| Category Elimination - European Geography #2 | 0 | - | 4.99 | 165,884 |
| Name a Valid European Country #1 | 0 | - | 4.99 | 258,210 |
| Name a Valid European Country #2 | 0 | - | 4.94 | 113,734 |
| Russia Country Quiz | 0 | - | 4.85 | 113,952 |
| Croatia Country Quiz | 0 | - | 4.83 | 43,028 |
| Bosnia and Herzegovina Country Quiz | 0 | - | 4.86 | 35,152 |
| France Cities Map Quiz | 0 | - | 4.96 | 165,595 |
| Germany Country Quiz | 0 | - | 4.82 | 157,028 |
| Germany Cities Map Quiz | 0 | - | 4.87 | 125,472 |
| Ancient Greek Trivia | 0 | - | 4.62 | 66,849 |
| Geography of Ancient Greece | 0 | - | 4.69 | 31,825 |
| Figures from Greek Mythology | 0 | - | 4.91 | 185,631 |
| Italy Country Quiz | 0 | - | 4.82 | 122,577 |
| Regions of Italy Map Quiz | 0 | - | 4.96 | 148,733 |
| Italy Cities Map Quiz | 0 | - | 4.97 | 151,382 |
| Countries Italy Declared War On | 0 | - | 4.75 | 43,110 |
| Countries Surrounding Rome | 0 | - | 4.97 | 49,418 |
| Byzantine History | 0 | - | 4.91 | 28,677 |
| Spain Cities Map Quiz | 0 | - | 4.87 | 96,325 |
| Regions of Spain Map Quiz | 0 | - | 4.95 | 184,948 |
| Canary Islands | 0 | - | 4.61 | 17,428 |
| Switzerland Immigration by Country | 0 | - | 4.70 | 29,325 |
| British Spellings | 0 | - | 4.07 | 99,336 |
| British Groups of Things | 0 | - | 4.25 | 82,750 |
| British Acronyms | 0 | - | 4.39 | 45,681 |
| United Kingdom Decoder | 0 | - | 4.29 | 39,985 |
| Biggest Immigrant Groups by Decade in the UK | 0 | - | 4.63 | 24,722 |
| Modern-Day Countries of the British Empire in 1921 | 0 | - | 4.99 | 116,712 |
| Geography of Scotland | 0 | - | 4.63 | 21,525 |
| Medieval English History | 0 | - | 4.53 | 43,373 |
| England or Wales? | 0 | - | 4.94 | 45,452 |
| All UEFA Champions League Teams Ever | 0 | - | 4.85 | 129,073 |
| U.S. Presidents Quiz | 0 | - | 5.00 | 3,669,725 |
| Deadliest U.S. Wars | 0 | - | 4.89 | 189,644 |
| Countries That Touch the Adriatic Sea | 0 | - | 4.96 | 70,893 |
| 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 | 113,686 |
| 100 Longest Rivers in Europe - with a Map | 0 | - | 4.94 | 65,058 |
| Category Elimination - European Countries #1 | 0 | - | 4.89 | 89,362 |
| The Only Remaining European Country . . . | 0 | - | 4.41 | 63,941 |
| Countries that Border Poland | 0 | - | 4.99 | 171,695 |
| Non-Bordering Countries Closest to Russia | 0 | - | 4.91 | 82,523 |
| Countries that Beat Russia | 0 | - | 4.81 | 82,181 |
| Countries With the Most Russian Speakers | 0 | - | 4.97 | 99,308 |
| Countries that Border Hungary | 0 | - | 4.98 | 103,888 |
| North Macedonia Country Quiz | 0 | - | 4.81 | 27,703 |
| Moldova Country Quiz | 0 | - | 4.81 | 30,634 |
| Countries Bordering Serbia | 0 | - | 4.96 | 91,996 |
| Andorra Country Quiz | 0 | - | 4.90 | 31,498 |
| Countries Bordering Austria | 0 | - | 4.97 | 117,973 |
| 20 Questions About France | 0 | - | 4.11 | 32,356 |
| Countries that Beat France | 0 | - | 4.49 | 75,378 |
| France True or False? | 0 | - | 4.43 | 39,841 |
| Geography of Germany | 0 | - | 4.35 | 17,123 |
| Countries that Beat Germany | 0 | - | 4.95 | 105,737 |
| Countries With the Most German Speakers | 0 | - | 4.89 | 95,159 |
| Country Quiz on a Map - Germany | 0 | - | 4.95 | 34,677 |
| Greek Mythology General Knowledge #2 | 0 | - | 4.59 | 73,168 |
| Ancient Greece - Multiple Choice | 0 | - | 4.54 | 41,518 |
| Counties of Ireland | 0 | - | 4.92 | 193,804 |
| Countries Bordering Italy | 0 | - | 4.94 | 100,601 |
| Countries that Beat Italy | 0 | - | 4.85 | 54,078 |
| Countries Closest to Italy | 0 | - | 4.97 | 196,788 |
| Ancient Roman Trivia #2 | 0 | - | 4.57 | 38,602 |
| Geography of the Roman Empire | 0 | - | 4.56 | 51,757 |
| Roman Names for Places | 0 | - | 4.62 | 58,014 |
| Countries Closest to Iceland | 0 | - | 4.89 | 73,081 |
| Countries that Beat Portugal | 0 | - | 4.86 | 58,898 |
| Geography of the Spanish Empire | 0 | - | 4.49 | 37,067 |
| Countries Closest to Spain | 0 | - | 4.96 | 226,099 |
| Countries that Beat Spain | 0 | - | 4.94 | 62,621 |
| British to American Word Translation | 0 | - | 3.74 | 254,871 |
| British Foods by Description | 0 | - | 3.94 | 48,282 |
| British and American Word Differences | 0 | - | 2.64 | 46,811 |
| The United States... or the United Kingdom? | 0 | - | 4.87 | 98,045 |
| British Geography Quiz #2 | 0 | - | 4.29 | 27,537 |
| Counties of the UK and Ireland | 0 | - | 4.98 | 129,282 |
| The Reign of Queen Elizabeth I | 0 | - | 4.53 | 31,668 |
| Houses of British Monarchs | 0 | - | 4.53 | 65,423 |
| British History Multiple Choice #1 | 0 | - | 4.46 | 55,026 |
