| Neutral European Countries of WWII | 0 | - | 4.91 | 161,974 |
| Two Letter Roman Numerals | 0 | - | 4.97 | 56,374 |
| Countries of Europe After World War II | 0 | - | 4.99 | 188,993 |
| States of the German Confederation in 1848 | 0 | - | 4.90 | 32,302 |
| Places Where Winston Churchill Said We Would Fight the Nazis | 0 | - | 4.57 | 14,641 |
| Olympian Gods Quiz | 0 | - | 4.96 | 502,647 |
| Ancient Greek Words | 0 | - | 4.93 | 112,147 |
| Countries of Europe Before World War I | 0 | - | 4.99 | 157,108 |
| Prime Ministers of the UK | 0 | - | 4.95 | 441,028 |
| Countries Closest to Germany A-Z | 0 | - | 4.98 | 27,469 |
| Most-Mentioned Characters in the Iliad | 0 | - | 4.81 | 20,898 |
| Biggest Axis-Controlled Cities | 0 | - | 4.44 | 48,975 |
| Countries of Europe in 1815 With a Map | 0 | - | 4.99 | 150,991 |
| Countries of Europe in 1848 | 0 | - | 4.98 | 84,375 |
| Countries of Europe in 1870 with a Map | 0 | - | 4.95 | 65,381 |
| 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 | 57,304 |
| States of Germany Map Quiz | 0 | - | 4.92 | 133,430 |
| States of Germany | 0 | - | 4.95 | 153,809 |
| Germany Immigration by Country | 0 | - | 4.86 | 81,462 |
| Countries Italy Declared War On | 0 | - | 4.75 | 43,526 |
| Countries Closest to Spain A-Z | 0 | - | 4.98 | 108,546 |
| Germany Country Quiz | 0 | - | 4.83 | 158,483 |
| Germany A-Z | 0 | - | 4.56 | 62,766 |
| Countries Bordering Germany | 0 | - | 4.99 | 371,165 |
| The Thirteen Dwarves in the Hobbit | 0 | - | 4.81 | 28,759 |
| Name the English Monarchs | 0 | - | 4.91 | 504,958 |
| Countries of the Japanese Empire | 0 | - | 4.97 | 104,451 |
| Europe Map Quiz | 0 | - | 5.00 | 4,777,729 |
| Category Elimination - European Countries #1 | 0 | - | 4.90 | 90,682 |
| The Reign of Napoleon | 0 | - | 4.54 | 39,070 |
| Countries With the Most German Speakers | 0 | - | 4.89 | 97,875 |
| Letters of the Greek Alphabet | 0 | - | 4.97 | 650,181 |
| Name that Greek Letter | 0 | - | 4.93 | 324,501 |
| Famous Ancient Romans | 0 | - | 4.70 | 85,669 |
| Mythology A-Z | 0 | - | 4.31 | 37,336 |
| Roman History Vocabulary | 0 | - | 4.41 | 57,680 |
| Count in Roman Numerals - 30 Second Sprint | 0 | - | 4.27 | 103,455 |
| The Life of Winston Churchill | 0 | - | 4.16 | 11,860 |
| The American Revolution | 0 | - | 4.52 | 54,314 |
| Europe by Borders in 30 Seconds | 0 | - | 4.98 | 429,923 |
| Biggest Countries in Europe in 1700 | 0 | - | 4.73 | 58,666 |
| Biggest Cities in Germany in 1910 | 0 | - | 4.41 | 23,532 |
| Countries that Beat Germany | 0 | - | 4.94 | 106,979 |
| Country Quiz on a Map - Germany | 0 | - | 4.95 | 35,380 |
| The Trojan War | 0 | - | 4.83 | 39,903 |
| Greek Mythology General Knowledge #1 | 0 | - | 4.85 | 112,552 |
| Ancient Roman Trivia #1 | 0 | - | 4.85 | 85,393 |
| Roman Emperors | 0 | - | 4.95 | 120,729 |
| Europe Cities Map Quiz | 0 | - | 4.99 | 365,525 |
| Biggest Trading Partners - Germany | 0 | - | 4.97 | 71,796 |
| Biggest Roman Empire Countries | 0 | - | 4.87 | 102,129 |
| Roman History by Picture | 0 | - | 4.46 | 26,542 |
| Biggest Trading Partners - Spain | 0 | - | 4.92 | 53,897 |
| Biggest Trading Partners – United Kingdom | 0 | - | 4.93 | 80,700 |
| Countries Closest to the United Kingdom A-Z | 0 | - | 4.96 | 191,317 |
| Name Every Beatles Song | 0 | - | 4.97 | 237,621 |
| Bohemian Rhapsody Lyrics | 0 | - | 4.98 | 292,414 |
| Zone 1 London Underground Stations - With a Map | 0 | - | 4.90 | 52,597 |
| Premier League Relegated Teams | 0 | - | 4.81 | 127,337 |
| Countries That Use the Euro | 0 | - | 4.95 | 106,101 |
| Flags of Europe Quiz | 0 | - | 4.99 | 1,252,187 |
| Countries of Europe - One Minute Sprint | 0 | - | 4.94 | 1,332,815 |
| 10 Easternmost Countries in Europe | 0 | - | 4.89 | 116,539 |
| 10 Biggest European Countries by Area | 0 | - | 4.99 | 193,200 |
| 10 Westernmost Countries in Europe | 0 | - | 4.96 | 151,763 |
| Top 10 Languages Spoken in Europe | 0 | - | 4.96 | 220,007 |
| European Landmarks Map Quiz | 0 | - | 4.97 | 87,547 |
| The Only European Country ... | 0 | - | 4.91 | 218,066 |
| Countries of Europe with an Empty Map | 0 | - | 5.00 | 311,931 |
| All First-Level Subdivisions of Europe on a Map | 0 | - | 4.98 | 174,478 |
| European Countries NOT in NATO | 0 | - | 4.90 | 62,024 |
| Countries with Territory in the Balkans | 0 | - | 4.96 | 89,834 |
| Eastern Europe Map Quiz | 0 | - | 4.91 | 128,569 |
| Slavic Countries | 0 | - | 4.96 | 112,098 |
| History of Russia Quiz | 0 | - | 4.47 | 31,977 |
| Countries of the Soviet Union | 0 | - | 4.98 | 195,317 |
| History of Germany | 0 | - | 4.39 | 52,931 |
| Modern Countries Conquered by Alexander the Great | 0 | - | 4.90 | 105,762 |
| History of Italy | 0 | - | 4.55 | 32,098 |
| Italy A-Z | 0 | - | 4.49 | 58,571 |
| Roman Numeral Decoding Quiz | 0 | - | 4.94 | 438,711 |
| Geography of the Dutch Empire | 0 | - | 4.62 | 34,763 |
| Countries of the Spanish Empire | 0 | - | 4.52 | 77,359 |
| Counties of England | 0 | - | 4.97 | 800,585 |
| Invasions of Great Britain | 0 | - | 4.51 | 60,019 |
| Middle Earth Geography | 0 | - | 4.56 | 39,904 |
| Lord of the Rings Trivia | 0 | - | 4.53 | 81,659 |
| Members of the Fellowship of the Ring | 0 | - | 4.74 | 45,924 |
| People Buried at Westminster Abbey | 0 | - | 4.67 | 14,285 |
| "Big Five" European Soccer Champions Since 2000 | 0 | - | 4.97 | 359,563 |
| The Iraq War | 0 | - | 4.47 | 15,687 |
| European Geography By Letter - P #1 | 0 | - | 4.81 | 98,366 |
| European Diaspora - Top 11 Countries | 0 | - | 4.90 | 96,246 |
| 10 European Countries with the Most Tourists | 0 | - | 4.98 | 138,127 |
| Three Band Flags of Europe | 0 | - | 4.98 | 194,050 |
| Pixelated Europe Map | 0 | - | 4.88 | 123,191 |
| Monarchies of Europe | 0 | - | 4.90 | 98,542 |
| European Countries with One Border | 0 | - | 4.97 | 183,395 |
| European Countries with the Fewest Borders | 0 | - | 4.97 | 180,163 |
| European Geography By Letter - B #2 | 0 | - | 4.86 | 87,890 |
| Federal Subjects of Russia | 0 | - | 4.95 | 148,544 |
| Countries That Border Russia | 0 | - | 4.98 | 463,665 |
| Soviet Leaders 1917–1991 | 0 | - | 4.44 | 95,345 |
| Soviet Union Country Quiz | 0 | - | 4.91 | 80,977 |
| Countries Formerly in Yugoslavia | 0 | - | 4.95 | 125,275 |
| Regions of France Map Quiz | 0 | - | 4.97 | 145,085 |
| Countries Bordering France | 0 | - | 4.83 | 404,137 |
| History of France | 0 | - | 4.61 | 57,415 |
| Figures from Greek Mythology | 0 | - | 4.91 | 188,168 |
| Regions of Italy | 0 | - | 4.92 | 76,535 |
| Netherlands Immigration by Country | 0 | - | 4.93 | 52,588 |
| Regions of Spain Quiz | 0 | - | 4.90 | 114,846 |
| Cantons of Switzerland | 0 | - | 4.98 | 51,538 |
| Countries and Territories of the United Kingdom | 0 | - | 4.90 | 94,305 |
| Wives of King Henry VIII | 0 | - | 4.55 | 53,429 |
| Countries the UK Declared War On | 0 | - | 4.55 | 123,053 |
| Geography of the British Empire | 0 | - | 4.48 | 39,800 |
| Countries "Ruled" by King Charles III | 0 | - | 4.78 | 82,818 |
| Champions League Winners | 0 | - | 4.92 | 1,012,148 |
| The Vietnam War | 0 | - | 4.44 | 35,611 |
| Prime Ministers of Australia | 0 | - | 4.51 | 32,110 |
| U.S. Presidents Quiz | 0 | - | 5.00 | 3,715,740 |
| Deadliest U.S. Wars | 0 | - | 4.89 | 191,468 |
| U.S. Civil War Decoder | 0 | - | 4.14 | 25,317 |
| Canadian Prime Ministers | 0 | - | 4.64 | 57,762 |
| Top 10 Coldest European Countries | 0 | - | 4.94 | 193,528 |
| Top 10 Hottest European Countries | 0 | - | 4.88 | 127,461 |
| Countries That Touch the Adriatic Sea | 0 | - | 4.96 | 71,263 |
| Top 10 European Countries by Coastline | 0 | - | 4.88 | 138,595 |
| Top 10 Richest Countries in Europe | 0 | - | 4.90 | 150,231 |
| Top 10 Biggest Economies in Europe | 0 | - | 4.98 | 200,119 |
| 100 Longest Rivers in Europe - with a Map | 0 | - | 4.94 | 65,723 |
| Biggest Trading Partners - European Union | 0 | - | 4.91 | 73,069 |
| Category Elimination - European Geography #1 | 0 | - | 4.98 | 234,858 |
| European Map without 10 Random Countries | 0 | - | 4.97 | 277,970 |
| Category Elimination - European Geography #2 | 0 | - | 4.99 | 168,200 |
| Name a Valid European Country #1 | 0 | - | 4.99 | 263,222 |
| Name a Valid European Country #2 | 0 | - | 4.94 | 115,450 |
| Countries that Border Poland | 0 | - | 4.99 | 172,845 |
| Russia Country Quiz | 0 | - | 4.83 | 114,990 |
| Non-Bordering Countries Closest to Russia | 0 | - | 4.91 | 83,084 |
| Countries With the Most Russian Speakers | 0 | - | 4.97 | 102,032 |
| Croatia Country Quiz | 0 | - | 4.83 | 43,577 |
| Countries that Border Hungary | 0 | - | 4.98 | 104,848 |
| Bosnia and Herzegovina Country Quiz | 0 | - | 4.86 | 35,482 |
| Countries Bordering Serbia | 0 | - | 4.96 | 92,839 |
| History of Austria | 0 | - | 4.70 | 17,941 |
| French Geography Quiz #1 | 0 | - | 4.89 | 34,985 |
| Andorra Country Quiz | 0 | - | 4.91 | 31,852 |
| Countries Bordering Austria | 0 | - | 4.97 | 118,783 |
| France Cities Map Quiz | 0 | - | 4.96 | 167,427 |
| Departments of France | 0 | - | 4.93 | 54,747 |
| Geography of the French Empire | 0 | - | 4.45 | 27,187 |
| The French Revolution | 0 | - | 4.47 | 24,098 |
| Countries that Visit France the Most | 0 | - | 4.85 | 46,038 |
| Countries Closest to Metropolitan France | 0 | - | 4.89 | 72,357 |
| Most Popular Baby Girls Names in Germany | 0 | - | 4.51 | 38,923 |
| Germany Cities Map Quiz | 0 | - | 4.87 | 126,839 |
| Famous Germans by Picture | 0 | - | 4.12 | 16,877 |
| Bundesliga Champions | 0 | - | 4.25 | 57,021 |
| All Bundesliga Teams Ever | 0 | - | 4.35 | 45,859 |
| German History A-Z | 0 | - | 4.49 | 24,701 |
| Ancient Greek Trivia | 0 | - | 4.62 | 67,158 |
| Geography of Ancient Greece | 0 | - | 4.69 | 31,984 |
| Greek Mythology General Knowledge #2 | 0 | - | 4.59 | 74,083 |
| Ancient Greece - Multiple Choice | 0 | - | 4.54 | 41,771 |
| Counties of Ireland | 0 | - | 4.92 | 196,614 |
| Regions of Italy Map Quiz | 0 | - | 4.96 | 149,919 |
| Italy Cities Map Quiz | 0 | - | 4.97 | 152,794 |
| Countries Bordering Italy | 0 | - | 4.94 | 101,122 |
| Countries Closest to Italy | 0 | - | 4.97 | 198,815 |
| Countries Surrounding Rome | 0 | - | 4.97 | 49,669 |
| Ancient Roman Trivia #2 | 0 | - | 4.60 | 43,778 |
| Geography of the Roman Empire | 0 | - | 4.56 | 52,118 |
| Roman Names for Places | 0 | - | 4.62 | 58,566 |
| Byzantine History | 0 | - | 4.91 | 28,969 |
| Byzantine Emperors | 0 | - | 4.92 | 14,464 |
| History of The Netherlands | 0 | - | 4.46 | 17,512 |
| The Vikings! | 0 | - | 4.46 | 28,386 |
| The Portuguese Empire | 0 | - | 4.58 | 12,090 |
| Spain Cities Map Quiz | 0 | - | 4.87 | 97,268 |
| Regions of Spain Map Quiz | 0 | - | 4.95 | 186,490 |
| Geography of the Spanish Empire | 0 | - | 4.49 | 37,267 |
| Countries Closest to Spain | 0 | - | 4.96 | 227,656 |
| Arthurian Legend | 0 | - | 4.33 | 25,141 |
| Modern-Day Countries of the British Empire in 1921 | 0 | - | 4.99 | 118,310 |
| Counties of the UK and Ireland | 0 | - | 4.98 | 131,726 |
| Lord of the Rings - Races | 0 | - | 4.25 | 58,929 |
| The Ultimate LOTR Character Quiz - The Books | 0 | - | 4.63 | 20,824 |
| The Reign of Queen Elizabeth I | 0 | - | 4.53 | 31,882 |
| Houses of British Monarchs | 0 | - | 4.53 | 65,848 |
| Top 100 UK Baby Girls' Names in 1850 | 0 | - | 4.35 | 62,401 |
| Medieval English History | 0 | - | 4.53 | 43,611 |
| British History Multiple Choice #1 | 0 | - | 4.46 | 55,250 |
| British History Multiple Choice #2 | 0 | - | 4.42 | 38,031 |
| Doctor Who Actors | 0 | - | 4.61 | 17,969 |
| World Capitals Closest to London | 0 | - | 4.88 | 110,913 |
| 50 Busiest Air Routes from London | 0 | - | 4.87 | 97,129 |
| 10 Closest Megacities to London | 0 | - | 4.90 | 17,792 |
