| Neutral European Countries of WWII | 0 | - | 4.91 | 161,142 |
| Two Letter Roman Numerals | 0 | - | 4.97 | 55,951 |
| Countries of Europe After World War II | 0 | - | 4.99 | 187,905 |
| States of the German Confederation in 1848 | 0 | - | 4.90 | 31,845 |
| Places Where Winston Churchill Said We Would Fight the Nazis | 0 | - | 4.57 | 14,589 |
| Olympian Gods Quiz | 0 | - | 4.96 | 499,175 |
| Ancient Greek Words | 0 | - | 4.93 | 111,244 |
| Countries of Europe Before World War I | 0 | - | 4.99 | 156,122 |
| Prime Ministers of the UK | 0 | - | 4.95 | 437,314 |
| Countries Closest to Germany A-Z | 0 | - | 4.98 | 27,188 |
| Biggest Axis-Controlled Cities | 0 | - | 4.43 | 48,788 |
| Countries of Europe in 1815 With a Map | 0 | - | 4.99 | 149,748 |
| Countries of Europe in 1848 | 0 | - | 4.98 | 76,025 |
| Countries of Europe in 1870 with a Map | 0 | - | 4.95 | 64,166 |
| Every Country of Europe Since 1815 With a Map | 0 | - | 4.98 | 70,627 |
| Countries of Europe in 1360 with a Map | 0 | - | 4.99 | 56,519 |
| States of Germany Map Quiz | 0 | - | 4.91 | 132,411 |
| States of Germany | 0 | - | 4.96 | 151,615 |
| Germany Immigration by Country | 0 | - | 4.85 | 80,790 |
| Countries Italy Declared War On | 0 | - | 4.75 | 43,215 |
| Countries Closest to Spain A-Z | 0 | - | 4.98 | 108,060 |
| Germany Country Quiz | 0 | - | 4.82 | 157,433 |
| Germany A-Z | 0 | - | 4.56 | 62,518 |
| Countries Bordering Germany | 0 | - | 4.99 | 368,411 |
| The Thirteen Dwarves in the Hobbit | 0 | - | 4.81 | 28,556 |
| Name the English Monarchs | 0 | - | 4.91 | 500,973 |
| Countries of the Japanese Empire | 0 | - | 4.97 | 104,114 |
| Europe Map Quiz | 0 | - | 5.00 | 4,751,629 |
| Category Elimination - European Countries #1 | 0 | - | 4.89 | 89,665 |
| The Reign of Napoleon | 0 | - | 4.54 | 38,874 |
| Countries With the Most German Speakers | 0 | - | 4.89 | 95,844 |
| Letters of the Greek Alphabet | 0 | - | 4.97 | 645,578 |
| Name that Greek Letter | 0 | - | 4.93 | 322,910 |
| Famous Ancient Romans | 0 | - | 4.70 | 85,358 |
| Mythology A-Z | 0 | - | 4.31 | 37,151 |
| Count in Roman Numerals - 30 Second Sprint | 0 | - | 4.26 | 102,374 |
| The Life of Winston Churchill | 0 | - | 4.16 | 11,834 |
| The American Revolution | 0 | - | 4.52 | 54,191 |
| Europe by Borders in 30 Seconds | 0 | - | 4.98 | 427,145 |
| Biggest Countries in Europe in 1700 | 0 | - | 4.73 | 58,358 |
| Biggest Cities in Germany in 1910 | 0 | - | 4.41 | 23,453 |
| Countries that Beat Germany | 0 | - | 4.95 | 106,018 |
| Country Quiz on a Map - Germany | 0 | - | 4.95 | 34,860 |
| The Trojan War | 0 | - | 4.83 | 39,623 |
| Greek Mythology General Knowledge #1 | 0 | - | 4.85 | 111,404 |
| Ancient Roman Trivia #1 | 0 | - | 4.85 | 84,365 |
| Roman Emperors | 0 | - | 4.95 | 119,551 |
| Europe Cities Map Quiz | 0 | - | 4.99 | 363,711 |
| Biggest Trading Partners - Germany | 0 | - | 4.97 | 71,215 |
| Roman History Vocabulary | 0 | - | 4.40 | 57,549 |
| Biggest Roman Empire Countries | 0 | - | 4.87 | 101,700 |
| Roman History by Picture | 0 | - | 4.46 | 26,419 |
| Biggest Trading Partners - Spain | 0 | - | 4.91 | 53,672 |
| Biggest Trading Partners – United Kingdom | 0 | - | 4.93 | 80,038 |
| Countries Closest to the United Kingdom A-Z | 0 | - | 4.96 | 190,537 |
| Name Every Beatles Song | 0 | - | 4.97 | 235,412 |
| Bohemian Rhapsody Lyrics | 0 | - | 4.98 | 291,367 |
| Zone 1 London Underground Stations - With a Map | 0 | - | 4.90 | 52,225 |
| Countries That Use the Euro | 0 | - | 4.95 | 104,318 |
| Flags of Europe Quiz | 0 | - | 4.99 | 1,238,093 |
| Countries of Europe - One Minute Sprint | 0 | - | 4.94 | 1,325,097 |
| 10 Easternmost Countries in Europe | 0 | - | 4.89 | 114,631 |
| 10 Biggest European Countries by Area | 0 | - | 4.99 | 192,323 |
| 10 Westernmost Countries in Europe | 0 | - | 4.96 | 150,863 |
| Top 10 Languages Spoken in Europe | 0 | - | 4.96 | 217,886 |
| European Landmarks Map Quiz | 0 | - | 4.97 | 86,900 |
| The Only European Country ... | 0 | - | 4.91 | 215,699 |
| Countries of Europe with an Empty Map | 0 | - | 5.00 | 309,762 |
| All First-Level Subdivisions of Europe on a Map | 0 | - | 4.99 | 170,104 |
| European Countries NOT in NATO | 0 | - | 4.90 | 60,595 |
| Countries with Territory in the Balkans | 0 | - | 4.96 | 88,889 |
| Eastern Europe Map Quiz | 0 | - | 4.91 | 127,627 |
| Slavic Countries | 0 | - | 4.96 | 111,398 |
| History of Russia Quiz | 0 | - | 4.49 | 31,867 |
| Countries of the Soviet Union | 0 | - | 4.98 | 194,365 |
| History of Germany | 0 | - | 4.39 | 52,757 |
| Modern Countries Conquered by Alexander the Great | 0 | - | 4.90 | 105,500 |
| Most-Mentioned Characters in the Iliad | 0 | - | 4.80 | 20,743 |
| History of Italy | 0 | - | 4.55 | 31,924 |
| Italy A-Z | 0 | - | 4.49 | 58,108 |
| Roman Numeral Decoding Quiz | 0 | - | 4.94 | 435,768 |
| Geography of the Dutch Empire | 0 | - | 4.61 | 34,600 |
| Countries of the Spanish Empire | 0 | - | 4.52 | 77,144 |
| Counties of England | 0 | - | 4.97 | 793,943 |
| Invasions of Great Britain | 0 | - | 4.51 | 59,773 |
| Middle Earth Geography | 0 | - | 4.56 | 39,709 |
| Lord of the Rings Trivia | 0 | - | 4.53 | 81,231 |
| Members of the Fellowship of the Ring | 0 | - | 4.74 | 45,721 |
| People Buried at Westminster Abbey | 0 | - | 4.67 | 14,233 |
| "Big Five" European Soccer Champions Since 2000 | 0 | - | 4.97 | 353,614 |
| The Iraq War | 0 | - | 4.47 | 15,622 |
| European Geography By Letter - P #1 | 0 | - | 4.80 | 97,010 |
| European Diaspora - Top 11 Countries | 0 | - | 4.90 | 95,594 |
| 10 European Countries with the Most Tourists | 0 | - | 4.98 | 137,145 |
| Three Band Flags of Europe | 0 | - | 4.98 | 192,760 |
| Pixelated Europe Map | 0 | - | 4.88 | 122,396 |
| Monarchies of Europe | 0 | - | 4.90 | 97,851 |
| European Countries with One Border | 0 | - | 4.97 | 182,374 |
| European Countries with the Fewest Borders | 0 | - | 4.97 | 179,202 |
| European Geography By Letter - B #2 | 0 | - | 4.84 | 77,464 |
| Federal Subjects of Russia | 0 | - | 4.95 | 145,915 |
| Countries That Border Russia | 0 | - | 4.98 | 460,820 |
| Soviet Leaders 1917–1991 | 0 | - | 4.44 | 94,785 |
| Soviet Union Country Quiz | 0 | - | 4.90 | 80,558 |
| Countries Formerly in Yugoslavia | 0 | - | 4.95 | 124,650 |
| Regions of France Map Quiz | 0 | - | 4.97 | 144,012 |
| Countries Bordering France | 0 | - | 4.83 | 401,623 |
| History of France | 0 | - | 4.59 | 56,756 |
| Figures from Greek Mythology | 0 | - | 4.91 | 186,221 |
| Regions of Italy | 0 | - | 4.92 | 75,428 |
| Netherlands Immigration by Country | 0 | - | 4.93 | 51,535 |
| Regions of Spain Quiz | 0 | - | 4.90 | 113,493 |
| Cantons of Switzerland | 0 | - | 4.98 | 50,925 |
| Countries and Territories of the United Kingdom | 0 | - | 4.89 | 93,479 |
| Wives of King Henry VIII | 0 | - | 4.55 | 53,294 |
| Countries the UK Declared War On | 0 | - | 4.61 | 122,233 |
| Geography of the British Empire | 0 | - | 4.48 | 39,618 |
| Countries "Ruled" by King Charles III | 0 | - | 4.78 | 82,696 |
| Champions League Winners | 0 | - | 4.92 | 1,002,724 |
| The Vietnam War | 0 | - | 4.44 | 35,456 |
| Countries of the Mongol Empire on a Map | 0 | - | 4.99 | 106,513 |
| African Countries with the Most Christians | 0 | - | 4.94 | 75,316 |
| Top 10 Richest Countries in Africa | 0 | - | 4.85 | 75,674 |
| Top 10 Biggest Economies in Africa | 0 | - | 4.99 | 119,933 |
| Prime Ministers of Australia | 0 | - | 4.50 | 31,826 |
| U.S. Presidents Quiz | 0 | - | 5.00 | 3,683,655 |
| Deadliest U.S. Wars | 0 | - | 4.89 | 190,364 |
| U.S. Civil War Decoder | 0 | - | 4.14 | 25,242 |
| Canadian Prime Ministers | 0 | - | 4.63 | 57,378 |
| Top 10 Coldest European Countries | 0 | - | 4.94 | 192,773 |
| Top 10 Hottest European Countries | 0 | - | 4.88 | 126,671 |
| Countries That Touch the Adriatic Sea | 0 | - | 4.96 | 71,004 |
| Top 10 European Countries by Coastline | 0 | - | 4.87 | 138,229 |
| Top 10 Richest Countries in Europe | 0 | - | 4.90 | 149,022 |
| Top 10 Biggest Economies in Europe | 0 | - | 4.98 | 198,395 |
| 100 Longest Rivers in Europe - with a Map | 0 | - | 4.94 | 65,275 |
| Biggest Trading Partners - European Union | 0 | - | 4.91 | 72,547 |
| Category Elimination - European Geography #1 | 0 | - | 4.98 | 232,302 |
| European Map without 10 Random Countries | 0 | - | 4.97 | 276,076 |
| Category Elimination - European Geography #2 | 0 | - | 4.99 | 166,465 |
| Name a Valid European Country #1 | 0 | - | 4.99 | 259,534 |
| Name a Valid European Country #2 | 0 | - | 4.94 | 114,180 |
| Countries that Border Poland | 0 | - | 4.99 | 171,962 |
| Russia Country Quiz | 0 | - | 4.85 | 114,177 |
| Non-Bordering Countries Closest to Russia | 0 | - | 4.91 | 82,667 |
| Countries With the Most Russian Speakers | 0 | - | 4.97 | 99,971 |
| Croatia Country Quiz | 0 | - | 4.83 | 43,183 |
| Countries that Border Hungary | 0 | - | 4.98 | 104,035 |
| Bosnia and Herzegovina Country Quiz | 0 | - | 4.86 | 35,260 |
| Countries Bordering Serbia | 0 | - | 4.96 | 92,185 |
| History of Austria | 0 | - | 4.70 | 17,825 |
| French Geography Quiz #1 | 0 | - | 4.89 | 34,694 |
| Countries Bordering Austria | 0 | - | 4.97 | 118,129 |
| France Cities Map Quiz | 0 | - | 4.96 | 166,287 |
| Departments of France | 0 | - | 4.93 | 53,627 |
| Geography of the French Empire | 0 | - | 4.45 | 27,014 |
| The French Revolution | 0 | - | 4.46 | 23,889 |
| Countries that Visit France the Most | 0 | - | 4.85 | 45,761 |
| Countries Closest to Metropolitan France | 0 | - | 4.89 | 72,053 |
| Most Popular Baby Girls Names in Germany | 0 | - | 4.51 | 38,745 |
| Germany Cities Map Quiz | 0 | - | 4.87 | 125,788 |
| Famous Germans by Picture | 0 | - | 4.12 | 16,809 |
| Bundesliga Champions | 0 | - | 4.25 | 56,211 |
| All Bundesliga Teams Ever | 0 | - | 4.35 | 45,373 |
| German History A-Z | 0 | - | 4.49 | 24,551 |
| Ancient Greek Trivia | 0 | - | 4.62 | 66,904 |
| Geography of Ancient Greece | 0 | - | 4.69 | 31,863 |
| Greek Mythology General Knowledge #2 | 0 | - | 4.59 | 73,384 |
| Ancient Greece - Multiple Choice | 0 | - | 4.54 | 41,582 |
| Counties of Ireland | 0 | - | 4.92 | 194,393 |
| Italy Country Quiz | 0 | - | 4.82 | 122,876 |
| Regions of Italy Map Quiz | 0 | - | 4.96 | 148,994 |
| Italy Cities Map Quiz | 0 | - | 4.97 | 151,697 |
| Countries Bordering Italy | 0 | - | 4.94 | 100,719 |
| Countries Closest to Italy | 0 | - | 4.97 | 197,579 |
| Countries Surrounding Rome | 0 | - | 4.97 | 49,494 |
| Ancient Roman Trivia #2 | 0 | - | 4.57 | 38,669 |
| Geography of the Roman Empire | 0 | - | 4.56 | 51,832 |
| Roman Names for Places | 0 | - | 4.62 | 58,134 |
| Byzantine History | 0 | - | 4.91 | 28,740 |
| History of The Netherlands | 0 | - | 4.46 | 17,392 |
| The Vikings! | 0 | - | 4.46 | 28,308 |
| The Portuguese Empire | 0 | - | 4.58 | 12,042 |
| Spain Cities Map Quiz | 0 | - | 4.87 | 96,582 |
| Regions of Spain Map Quiz | 0 | - | 4.95 | 185,246 |
| Geography of the Spanish Empire | 0 | - | 4.49 | 37,100 |
| Countries Closest to Spain | 0 | - | 4.96 | 226,479 |
| Arthurian Legend | 0 | - | 4.33 | 25,089 |
| Modern-Day Countries of the British Empire in 1921 | 0 | - | 4.99 | 117,100 |
| Counties of the UK and Ireland | 0 | - | 4.98 | 129,890 |
| Lord of the Rings - Races | 0 | - | 4.25 | 58,659 |
| The Ultimate LOTR Character Quiz - The Books | 0 | - | 4.61 | 20,656 |
| The Reign of Queen Elizabeth I | 0 | - | 4.53 | 31,721 |
| Houses of British Monarchs | 0 | - | 4.53 | 65,539 |
| Top 100 UK Baby Girls' Names in 1850 | 0 | - | 4.35 | 61,892 |
| Medieval English History | 0 | - | 4.53 | 43,438 |
| British History Multiple Choice #1 | 0 | - | 4.46 | 55,080 |
| British History Multiple Choice #2 | 0 | - | 4.42 | 37,917 |
| Doctor Who Actors | 0 | - | 4.61 | 17,899 |
| World Capitals Closest to London | 0 | - | 4.87 | 110,167 |
