| History of France | 0 | - | 4.61 | 57,421 |
| States of the German Confederation in 1848 | 0 | - | 4.90 | 32,303 |
| Regions of France Map Quiz | 0 | - | 4.97 | 145,091 |
| Geography of the French Empire | 0 | - | 4.45 | 27,187 |
| The French Revolution | 0 | - | 4.47 | 24,098 |
| Counties of England | 0 | - | 4.97 | 800,622 |
| Wives of King Henry VIII | 0 | - | 4.55 | 53,429 |
| Countries the UK Declared War On | 0 | - | 4.55 | 123,060 |
| Geography of the British Empire | 0 | - | 4.48 | 39,800 |
| Countries of Europe in 1815 With a Map | 0 | - | 4.99 | 150,992 |
| Countries of Europe in 1848 | 0 | - | 4.98 | 84,391 |
| Countries of Europe in 1870 with a Map | 0 | - | 4.95 | 65,389 |
| Every Country of Europe Since 1815 With a Map | 0 | - | 4.98 | 71,527 |
| Countries of Europe in 1360 with a Map | 0 | - | 4.99 | 57,311 |
| States of Germany Map Quiz | 0 | - | 4.92 | 133,436 |
| States of Germany | 0 | - | 4.95 | 153,814 |
| Germany Immigration by Country | 0 | - | 4.86 | 81,465 |
| Regions of Italy | 0 | - | 4.92 | 76,538 |
| History of Italy | 0 | - | 4.55 | 32,099 |
| Geography of the Dutch Empire | 0 | - | 4.62 | 34,763 |
| Netherlands Immigration by Country | 0 | - | 4.93 | 52,589 |
| Regions of Spain Quiz | 0 | - | 4.90 | 114,864 |
| Countries of the Spanish Empire | 0 | - | 4.52 | 77,360 |
| Cantons of Switzerland | 0 | - | 4.98 | 51,540 |
| Countries and Territories of the United Kingdom | 0 | - | 4.90 | 94,308 |
| Invasions of Great Britain | 0 | - | 4.51 | 60,022 |
| 10 Closest Megacities to London | 0 | - | 4.90 | 17,792 |
| Europe Map Quiz | 0 | - | 5.00 | 4,777,923 |
| Regions of France | 0 | - | 4.70 | 121,605 |
| France Immigration by Country | 0 | - | 4.70 | 76,793 |
| Countries Bordering France | 0 | - | 4.83 | 404,145 |
| French History Multiple Choice | 0 | - | 4.55 | 33,163 |
| Anglo-Saxon and Viking Kings of England | 0 | - | 4.74 | 12,295 |
| Biggest Countries in Europe in 1700 | 0 | - | 4.73 | 58,667 |
| Departments of France | 0 | - | 4.93 | 54,750 |
| History of Germany | 0 | - | 4.39 | 52,932 |
| Name the English Monarchs | 0 | - | 4.91 | 504,972 |
| Anglo-Saxon Kingdoms of England | 0 | - | 4.60 | 25,800 |
| Giant Great Britain Millennium Quiz | 0 | - | 4.78 | 20,205 |
| Europe by Borders in 30 Seconds | 0 | - | 4.98 | 429,937 |
| History of Austria | 0 | - | 4.70 | 17,944 |
| French Geography Quiz #1 | 0 | - | 4.89 | 34,986 |
| Countries that Visit France the Most | 0 | - | 4.85 | 46,040 |
| Countries Closest to Metropolitan France | 0 | - | 4.89 | 72,359 |
| Biggest Cities in Germany in 1910 | 0 | - | 4.41 | 23,532 |
| The Vikings! | 0 | - | 4.46 | 28,386 |
| The Portuguese Empire | 0 | - | 4.58 | 12,090 |
| French Inventions | 0 | - | 4.10 | 13,915 |
| Country Quiz on a Map - France | 0 | - | 4.98 | 47,524 |
| History of Paris | 0 | - | 4.24 | 13,666 |
| Embarrassing Chapters in French History | 0 | - | 3.65 | 20,150 |
| The Trojan War | 0 | - | 4.83 | 39,904 |
| Letters of the Greek Alphabet | 0 | - | 4.97 | 650,208 |
| Name that Greek Letter | 0 | - | 4.93 | 324,513 |
| Greek Mythology General Knowledge #1 | 0 | - | 4.85 | 112,560 |
| Ancient Roman Trivia #1 | 0 | - | 4.85 | 85,398 |
| Roman Emperors | 0 | - | 4.95 | 120,734 |
| Malta Country Quiz | 0 | - | 4.81 | 31,171 |
| Countries That Use the Euro | 0 | - | 4.95 | 106,107 |
| Europe Cities Map Quiz | 0 | - | 4.99 | 365,544 |
| 10 Easternmost Countries in Europe | 0 | - | 4.89 | 116,546 |
| The Only European Country ... | 0 | - | 4.91 | 218,080 |
| European Countries NOT in NATO | 0 | - | 4.90 | 62,031 |
| History of Russia Quiz | 0 | - | 4.47 | 31,977 |
| 101 Figures from Greek Mythology | 0 | - | 4.99 | 126,960 |
| History of The Netherlands | 0 | - | 4.46 | 17,512 |
| Former Dominions of the British Empire | 0 | - | 4.27 | 24,234 |
| Flags of Europe Quiz | 0 | - | 4.99 | 1,252,275 |
| Countries of Europe - One Minute Sprint | 0 | - | 4.94 | 1,332,848 |
| 10 Biggest European Countries by Area | 0 | - | 4.99 | 193,206 |
| 10 Westernmost Countries in Europe | 0 | - | 4.96 | 151,766 |
| Top 10 Languages Spoken in Europe | 0 | - | 4.96 | 220,018 |
| European Landmarks Map Quiz | 0 | - | 4.97 | 87,553 |
| Countries of Europe with an Empty Map | 0 | - | 5.00 | 311,935 |
| All First-Level Subdivisions of Europe on a Map | 0 | - | 4.98 | 174,506 |
| Countries with Territory in the Balkans | 0 | - | 4.96 | 89,840 |
| Eastern Europe Map Quiz | 0 | - | 4.91 | 128,576 |
| Slavic Countries | 0 | - | 4.96 | 112,106 |
| Germany Multiple Choice | 0 | - | 4.84 | 54,571 |
| Olympian Gods Quiz | 0 | - | 4.96 | 502,660 |
| Ancient Greek Words | 0 | - | 4.93 | 112,154 |
| History of Spain | 0 | - | 4.23 | 21,140 |
| "Big Five" European Soccer Champions Since 2000 | 0 | - | 4.97 | 359,590 |
| The Reign of Napoleon | 0 | - | 4.54 | 39,070 |
| States of the Holy Roman Empire in 1356 | 0 | - | 4.98 | 74,855 |
| Largest Islands of Greece | 0 | - | 4.59 | 48,281 |
| Roman Numeral Decoding Quiz | 0 | - | 4.94 | 438,724 |
| Two Letter Roman Numerals | 0 | - | 4.97 | 56,377 |
| Provinces of the Netherlands | 0 | - | 4.80 | 41,586 |
| 100 Greatest Britons Quiz | 0 | - | 4.41 | 48,371 |
| Foods in a Full English Breakfast | 0 | - | 4.46 | 103,588 |
| The UK for Americans - True or False | 0 | - | 4.43 | 58,743 |
| Champions League Winners | 0 | - | 4.92 | 1,012,185 |
| European Geography By Letter - P #1 | 0 | - | 4.81 | 98,382 |
| European Diaspora - Top 11 Countries | 0 | - | 4.90 | 96,252 |
| 10 European Countries with the Most Tourists | 0 | - | 4.98 | 138,130 |
| Three Band Flags of Europe | 0 | - | 4.98 | 194,061 |
| Pixelated Europe Map | 0 | - | 4.88 | 123,197 |
| Monarchies of Europe | 0 | - | 4.90 | 98,545 |
| European Countries with One Border | 0 | - | 4.97 | 183,402 |
| European Countries with the Fewest Borders | 0 | - | 4.97 | 180,169 |
| European Geography By Letter - B #2 | 0 | - | 4.86 | 87,922 |
| Federal Subjects of Russia | 0 | - | 4.95 | 148,548 |
| Countries That Border Russia | 0 | - | 4.98 | 463,674 |
| Countries Formerly in Yugoslavia | 0 | - | 4.95 | 125,278 |
| France Country Quiz | 0 | - | 4.70 | 135,397 |
| Movies Set in France | 0 | - | 4.26 | 13,139 |
| Kings of France Quiz | 0 | - | 4.20 | 32,862 |
| Countries Bordering Germany | 0 | - | 4.99 | 371,176 |
| Embarrassing Chapters in Italian History | 0 | - | 4.24 | 12,140 |
| American to British Word Translation | 0 | - | 4.14 | 139,484 |
| Languages of the United Kingdom | 0 | - | 4.14 | 41,000 |
| Counties of England Map Quiz | 0 | - | 4.97 | 308,539 |
| British Geography Multiple Choice | 0 | - | 4.49 | 43,408 |
| Modern-Day Countries of the Holy Roman Empire on a Map | 0 | - | 4.93 | 45,821 |
| Top 10 Coldest European Countries | 0 | - | 4.94 | 193,534 |
| Top 10 Hottest European Countries | 0 | - | 4.88 | 127,470 |
| Category Elimination - European Geography #1 | 0 | - | 4.98 | 234,868 |
| European Map without 10 Random Countries | 0 | - | 4.97 | 277,976 |
| Category Elimination - European Geography #2 | 0 | - | 4.99 | 168,211 |
| Name a Valid European Country #1 | 0 | - | 4.99 | 263,244 |
| Name a Valid European Country #2 | 0 | - | 4.94 | 115,459 |
| Russia Country Quiz | 0 | - | 4.83 | 115,012 |
| Croatia Country Quiz | 0 | - | 4.83 | 43,580 |
| Bosnia and Herzegovina Country Quiz | 0 | - | 4.86 | 35,482 |
| Andorra Country Quiz | 0 | - | 4.91 | 31,853 |
| France Cities Map Quiz | 0 | - | 4.96 | 167,433 |
| Germany Country Quiz | 0 | - | 4.83 | 158,488 |
| Germany Cities Map Quiz | 0 | - | 4.87 | 126,840 |
| Ancient Greek Trivia | 0 | - | 4.62 | 67,158 |
| Geography of Ancient Greece | 0 | - | 4.69 | 31,985 |
| Most-Mentioned Characters in the Iliad | 0 | - | 4.81 | 20,900 |
| Figures from Greek Mythology | 0 | - | 4.91 | 188,178 |
| Regions of Italy Map Quiz | 0 | - | 4.96 | 149,922 |
| Italy Cities Map Quiz | 0 | - | 4.97 | 152,801 |
| Countries Italy Declared War On | 0 | - | 4.75 | 43,528 |
| Countries Surrounding Rome | 0 | - | 4.97 | 49,672 |
| Byzantine History | 0 | - | 4.91 | 28,969 |
| Byzantine Emperors | 0 | - | 4.92 | 14,466 |
| Spain Cities Map Quiz | 0 | - | 4.87 | 97,268 |
| Regions of Spain Map Quiz | 0 | - | 4.95 | 186,494 |
| Canary Islands | 0 | - | 4.62 | 17,505 |
| Switzerland Immigration by Country | 0 | - | 4.69 | 29,929 |
| British Spellings | 0 | - | 4.06 | 99,540 |
| British Groups of Things | 0 | - | 4.25 | 82,957 |
| British Acronyms | 0 | - | 4.40 | 45,888 |
| United Kingdom Decoder | 0 | - | 4.29 | 40,078 |
| Biggest Immigrant Groups by Decade in the UK | 0 | - | 4.63 | 25,524 |
| Modern-Day Countries of the British Empire in 1921 | 0 | - | 4.99 | 118,316 |
| English Monarchs in Order by First Letter | 0 | - | 4.38 | 32,039 |
| Geography of Scotland | 0 | - | 4.63 | 21,698 |
| Medieval English History | 0 | - | 4.53 | 43,611 |
| England or Wales? | 0 | - | 4.94 | 45,867 |
| All UEFA Champions League Teams Ever | 0 | - | 4.85 | 131,462 |
| Countries of the Mongol Empire on a Map | 0 | - | 4.99 | 107,268 |
| U.S. Presidents Quiz | 0 | - | 5.00 | 3,715,918 |
| Deadliest U.S. Wars | 0 | - | 4.89 | 191,478 |
| Countries That Touch the Adriatic Sea | 0 | - | 4.96 | 71,265 |
| European Countries with the Fewest Overnight Visitors | 0 | - | 4.80 | 41,693 |
| Top 10 European Countries by Coastline | 0 | - | 4.88 | 138,597 |
| Top 20 Football Clubs in Europe | 0 | - | 4.48 | 116,105 |
| 100 Longest Rivers in Europe - with a Map | 0 | - | 4.94 | 65,723 |
| Category Elimination - European Countries #1 | 0 | - | 4.90 | 90,687 |
| The Only Remaining European Country . . . | 0 | - | 4.41 | 64,524 |
| Countries that Border Poland | 0 | - | 4.99 | 172,848 |
| Non-Bordering Countries Closest to Russia | 0 | - | 4.91 | 83,087 |
| Countries that Beat Russia | 0 | - | 4.81 | 83,302 |
| Countries With the Most Russian Speakers | 0 | - | 4.97 | 102,043 |
| Countries that Border Hungary | 0 | - | 4.98 | 104,852 |
| North Macedonia Country Quiz | 0 | - | 4.81 | 27,970 |
| Moldova Country Quiz | 0 | - | 4.82 | 30,940 |
| Countries Bordering Serbia | 0 | - | 4.96 | 92,844 |
| Countries Bordering Austria | 0 | - | 4.97 | 118,786 |
| 20 Questions About France | 0 | - | 4.11 | 32,445 |
| Countries that Beat France | 0 | - | 4.48 | 76,164 |
| France True or False? | 0 | - | 4.44 | 40,023 |
| Geography of Germany | 0 | - | 4.35 | 17,233 |
| Countries that Beat Germany | 0 | - | 4.94 | 106,989 |
| Countries With the Most German Speakers | 0 | - | 4.89 | 97,886 |
| Country Quiz on a Map - Germany | 0 | - | 4.95 | 35,382 |
| Greek Mythology General Knowledge #2 | 0 | - | 4.59 | 74,086 |
| Ancient Greece - Multiple Choice | 0 | - | 4.54 | 41,771 |
| Counties of Ireland | 0 | - | 4.92 | 196,633 |
| Countries Bordering Italy | 0 | - | 4.94 | 101,125 |
| Countries that Beat Italy | 0 | - | 4.85 | 54,929 |
| Countries Closest to Italy | 0 | - | 4.97 | 198,847 |
| Ancient Roman Trivia #2 | 0 | - | 4.60 | 43,804 |
| Geography of the Roman Empire | 0 | - | 4.56 | 52,125 |
| Roman Names for Places | 0 | - | 4.62 | 58,572 |
| Countries Closest to Iceland | 0 | - | 4.90 | 73,895 |
| Countries that Beat Portugal | 0 | - | 4.86 | 59,674 |
| Geography of the Spanish Empire | 0 | - | 4.49 | 37,268 |
| Countries Closest to Spain | 0 | - | 4.96 | 227,667 |
| Countries that Beat Spain | 0 | - | 4.94 | 63,191 |
| British to American Word Translation | 0 | - | 3.74 | 255,246 |
| British Foods by Description | 0 | - | 3.94 | 48,356 |
| British and American Word Differences | 0 | - | 2.63 | 46,912 |
| The United States... or the United Kingdom? | 0 | - | 4.87 | 98,877 |
| British Geography Quiz #2 | 0 | - | 4.29 | 28,164 |
| Counties of the UK and Ireland | 0 | - | 4.98 | 131,728 |
