| Countries of Europe After World War II | 0 | - | 4.99 | 187,988 |
| Neutral European Countries of WWII | 0 | - | 4.91 | 161,212 |
| Two Letter Roman Numerals | 0 | - | 4.97 | 55,982 |
| Countries of Europe Before World War I | 0 | - | 4.99 | 156,196 |
| States of the German Confederation in 1848 | 0 | - | 4.89 | 31,862 |
| Places Where Winston Churchill Said We Would Fight the Nazis | 0 | - | 4.57 | 14,593 |
| Olympian Gods Quiz | 0 | - | 4.96 | 499,415 |
| Countries Closest to Germany A-Z | 0 | - | 4.98 | 27,209 |
| Countries of the Japanese Empire | 0 | - | 4.97 | 104,147 |
| The Life of Winston Churchill | 0 | - | 4.16 | 11,835 |
| Countries Italy Declared War On | 0 | - | 4.75 | 43,235 |
| Byzantine History | 0 | - | 4.91 | 28,749 |
| Countries of Europe in 1815 With a Map | 0 | - | 4.99 | 149,845 |
| Countries of Europe in 1848 | 0 | - | 4.99 | 76,092 |
| Countries of Europe in 1870 with a Map | 0 | - | 4.95 | 64,241 |
| Every Country of Europe Since 1815 With a Map | 0 | - | 4.98 | 70,675 |
| Countries of Europe in 1360 with a Map | 0 | - | 4.99 | 56,570 |
| States of Germany Map Quiz | 0 | - | 4.91 | 132,491 |
| States of Germany | 0 | - | 4.96 | 151,765 |
| Germany Immigration by Country | 0 | - | 4.85 | 80,851 |
| Countries Bordering Germany | 0 | - | 4.99 | 368,515 |
| Countries Closest to Spain A-Z | 0 | - | 4.98 | 108,095 |
| Germany Country Quiz | 0 | - | 4.82 | 157,518 |
| Name the English Monarchs | 0 | - | 4.91 | 501,276 |
| The American Revolution | 0 | - | 4.52 | 54,207 |
| Europe Map Quiz | 0 | - | 5.00 | 4,754,275 |
| Category Elimination - European Countries #1 | 0 | - | 4.89 | 89,721 |
| The Reign of Napoleon | 0 | - | 4.54 | 38,890 |
| Countries With the Most German Speakers | 0 | - | 4.89 | 95,993 |
| Letters of the Greek Alphabet | 0 | - | 4.97 | 645,905 |
| Name that Greek Letter | 0 | - | 4.93 | 323,028 |
| Mythology A-Z | 0 | - | 4.31 | 37,159 |
| Count in Roman Numerals - 30 Second Sprint | 0 | - | 4.26 | 102,461 |
| Prime Ministers of the UK | 0 | - | 4.95 | 437,618 |
| Biggest Axis-Controlled Cities | 0 | - | 4.43 | 48,809 |
| Europe by Borders in 30 Seconds | 0 | - | 4.98 | 427,353 |
| Biggest Countries in Europe in 1700 | 0 | - | 4.73 | 58,380 |
| Biggest Cities in Germany in 1910 | 0 | - | 4.41 | 23,458 |
| Countries that Beat Germany | 0 | - | 4.95 | 106,070 |
| Country Quiz on a Map - Germany | 0 | - | 4.95 | 34,886 |
| The Trojan War | 0 | - | 4.83 | 39,637 |
| Greek Mythology General Knowledge #1 | 0 | - | 4.85 | 111,494 |
| Ancient Roman Trivia #1 | 0 | - | 4.85 | 84,398 |
| Roman Emperors | 0 | - | 4.95 | 119,623 |
| Ultimate Harry Potter Name Game | 0 | - | 4.94 | 492,819 |
| Countries That Use the Euro | 0 | - | 4.95 | 104,450 |
| Europe Cities Map Quiz | 0 | - | 4.99 | 363,868 |
| 10 Easternmost Countries in Europe | 0 | - | 4.89 | 114,756 |
| The Only European Country ... | 0 | - | 4.91 | 215,884 |
| European Countries NOT in NATO | 0 | - | 4.90 | 60,698 |
| Germany A-Z | 0 | - | 4.56 | 62,533 |
| History of Germany | 0 | - | 4.39 | 52,771 |
| Modern Countries Conquered by Alexander the Great | 0 | - | 4.90 | 105,519 |
| Ancient Greek Words | 0 | - | 4.93 | 111,301 |
| Most-Mentioned Characters in the Iliad | 0 | - | 4.80 | 20,746 |
| Roman Numeral Decoding Quiz | 0 | - | 4.94 | 435,975 |
| Countries Closest to the United Kingdom A-Z | 0 | - | 4.96 | 190,601 |
| Name Every Beatles Song | 0 | - | 4.97 | 235,551 |
| Bohemian Rhapsody Lyrics | 0 | - | 4.98 | 291,426 |
| People Buried at Westminster Abbey | 0 | - | 4.67 | 14,237 |
| The Iraq War | 0 | - | 4.47 | 15,630 |
| Flags of Europe Quiz | 0 | - | 4.99 | 1,239,288 |
| Countries of Europe - One Minute Sprint | 0 | - | 4.94 | 1,325,829 |
| 10 Biggest European Countries by Area | 0 | - | 4.99 | 192,386 |
| 10 Westernmost Countries in Europe | 0 | - | 4.96 | 150,931 |
| Top 10 Languages Spoken in Europe | 0 | - | 4.96 | 218,064 |
| European Landmarks Map Quiz | 0 | - | 4.97 | 86,951 |
| Countries of Europe with an Empty Map | 0 | - | 5.00 | 309,904 |
| All First-Level Subdivisions of Europe on a Map | 0 | - | 4.98 | 170,447 |
| Countries with Territory in the Balkans | 0 | - | 4.96 | 88,952 |
| Eastern Europe Map Quiz | 0 | - | 4.91 | 127,686 |
| Slavic Countries | 0 | - | 4.96 | 111,450 |
| History of Russia Quiz | 0 | - | 4.49 | 31,878 |
| Countries of the Soviet Union | 0 | - | 4.98 | 194,399 |
| Soviet Union Country Quiz | 0 | - | 4.90 | 80,582 |
| Figures from Greek Mythology | 0 | - | 4.91 | 186,348 |
| History of Italy | 0 | - | 4.55 | 31,930 |
| Modern-Day Countries of the Roman Empire on a Map | 0 | - | 4.99 | 125,519 |
| Geography of the Dutch Empire | 0 | - | 4.61 | 34,606 |
| Countries of the Spanish Empire | 0 | - | 4.52 | 77,155 |
| Counties of England | 0 | - | 4.97 | 794,474 |
| Invasions of Great Britain | 0 | - | 4.51 | 59,783 |
| The Thirteen Dwarves in the Hobbit | 0 | - | 4.81 | 28,582 |
| Lord of the Rings Decoder | 0 | - | 4.59 | 42,528 |
| "Big Five" European Soccer Champions Since 2000 | 0 | - | 4.97 | 354,016 |
| Champions League Winners | 0 | - | 4.92 | 1,003,436 |
| Countries of the Mongol Empire on a Map | 0 | - | 4.99 | 106,576 |
| African Countries with the Most Christians | 0 | - | 4.94 | 75,383 |
| African Countries with the Most Muslims | 0 | - | 4.80 | 100,767 |
| Top 10 Biggest Economies in Africa | 0 | - | 4.99 | 120,160 |
| Prime Ministers of Australia | 0 | - | 4.50 | 31,843 |
| Canadian Prime Ministers | 0 | - | 4.63 | 57,408 |
| Top 10 Coldest European Countries | 0 | - | 4.94 | 192,838 |
| Top 10 Hottest European Countries | 0 | - | 4.88 | 126,740 |
| European Diaspora - Top 11 Countries | 0 | - | 4.90 | 95,642 |
| 10 European Countries with the Most Tourists | 0 | - | 4.98 | 137,204 |
| Three Band Flags of Europe | 0 | - | 4.98 | 192,864 |
| Top 10 Biggest Economies in Europe | 0 | - | 4.98 | 198,704 |
| Pixelated Europe Map | 0 | - | 4.88 | 122,467 |
| Monarchies of Europe | 0 | - | 4.90 | 97,916 |
| European Countries with One Border | 0 | - | 4.97 | 182,463 |
| European Countries with the Fewest Borders | 0 | - | 4.97 | 179,270 |
| Category Elimination - European Geography #1 | 0 | - | 4.98 | 232,491 |
| European Map without 10 Random Countries | 0 | - | 4.97 | 276,222 |
| European Geography By Letter - B #2 | 0 | - | 4.85 | 77,858 |
| Category Elimination - European Geography #2 | 0 | - | 4.99 | 166,585 |
| Name a Valid European Country #1 | 0 | - | 4.99 | 259,778 |
| Name a Valid European Country #2 | 0 | - | 4.94 | 114,279 |
| Russia Country Quiz | 0 | - | 4.85 | 114,241 |
| Federal Subjects of Russia | 0 | - | 4.95 | 146,197 |
| Countries That Border Russia | 0 | - | 4.98 | 461,008 |
| Soviet Leaders 1917–1991 | 0 | - | 4.44 | 94,817 |
| Croatia Country Quiz | 0 | - | 4.83 | 43,215 |
| Countries Formerly in Yugoslavia | 0 | - | 4.95 | 124,695 |
| Bosnia and Herzegovina Country Quiz | 0 | - | 4.86 | 35,279 |
| History of Austria | 0 | - | 4.70 | 17,831 |
| Regions of France Map Quiz | 0 | - | 4.97 | 144,088 |
| France Cities Map Quiz | 0 | - | 4.96 | 166,392 |
| Departments of France | 0 | - | 4.93 | 53,719 |
| Geography of the French Empire | 0 | - | 4.45 | 27,018 |
| The French Revolution | 0 | - | 4.46 | 23,894 |
| Countries Bordering France | 0 | - | 4.83 | 401,777 |
| History of France | 0 | - | 4.59 | 56,796 |
| Most Popular Baby Girls Names in Germany | 0 | - | 4.51 | 38,753 |
| Germany Cities Map Quiz | 0 | - | 4.87 | 125,841 |
| German History A-Z | 0 | - | 4.49 | 24,565 |
| Ancient Greek Trivia | 0 | - | 4.62 | 66,925 |
| Geography of Ancient Greece | 0 | - | 4.69 | 31,874 |
| Regions of Italy | 0 | - | 4.92 | 75,500 |
| Italy Country Quiz | 0 | - | 4.82 | 123,152 |
| Regions of Italy Map Quiz | 0 | - | 4.96 | 149,066 |
| Italy Cities Map Quiz | 0 | - | 4.97 | 151,781 |
| Countries Surrounding Rome | 0 | - | 4.97 | 49,511 |
| Netherlands Immigration by Country | 0 | - | 4.93 | 51,767 |
| The Vikings! | 0 | - | 4.46 | 28,316 |
| The Portuguese Empire | 0 | - | 4.58 | 12,045 |
| Spain Cities Map Quiz | 0 | - | 4.87 | 96,637 |
| Regions of Spain Quiz | 0 | - | 4.90 | 113,594 |
| Regions of Spain Map Quiz | 0 | - | 4.95 | 185,328 |
| Cantons of Switzerland | 0 | - | 4.98 | 50,953 |
| Countries and Territories of the United Kingdom | 0 | - | 4.89 | 93,512 |
| Modern-Day Countries of the British Empire in 1921 | 0 | - | 4.99 | 117,169 |
| Wives of King Henry VIII | 0 | - | 4.55 | 53,303 |
| Countries the UK Declared War On | 0 | - | 4.61 | 122,273 |
| Geography of the British Empire | 0 | - | 4.48 | 39,627 |
| Medieval English History | 0 | - | 4.53 | 43,450 |
| Countries "Ruled" by King Charles III | 0 | - | 4.78 | 82,705 |
| 10 Closest Megacities to London | 0 | - | 4.90 | 17,655 |
| England or Wales? | 0 | - | 4.94 | 45,588 |
| All UEFA Champions League Teams Ever | 0 | - | 4.85 | 129,674 |
| Asian Countries with the Most Christians | 0 | - | 4.85 | 96,957 |
| Top 10 Biggest Economies in Asia | 0 | - | 4.85 | 126,927 |
| The Vietnam War | 0 | - | 4.44 | 35,473 |
| Hindu Countries | 0 | - | 4.86 | 49,984 |
| Top 10 Richest Countries in Africa | 0 | - | 4.86 | 75,911 |
| Biggest Trading Partners – Australia | 0 | - | 4.93 | 61,388 |
| Arms Exports - United States | 0 | - | 4.75 | 62,233 |
| U.S. Presidents Quiz | 0 | - | 5.00 | 3,686,790 |
| Deadliest U.S. Wars | 0 | - | 4.89 | 190,470 |
| U.S. Civil War Decoder | 0 | - | 4.14 | 25,247 |
| Countries That Touch the Adriatic Sea | 0 | - | 4.96 | 71,027 |
| Top 10 European Countries by Coastline | 0 | - | 4.87 | 138,263 |
| Top 10 Richest Countries in Europe | 0 | - | 4.90 | 149,265 |
| 100 Longest Rivers in Europe - with a Map | 0 | - | 4.94 | 65,328 |
| Biggest Trading Partners - European Union | 0 | - | 4.91 | 72,634 |
| Countries that Border Poland | 0 | - | 4.99 | 172,018 |
| Non-Bordering Countries Closest to Russia | 0 | - | 4.91 | 82,695 |
| Countries that Beat Russia | 0 | - | 4.81 | 82,431 |
| Countries With the Most Russian Speakers | 0 | - | 4.97 | 100,114 |
| The Dictator Files: Joseph Stalin | 0 | - | 4.37 | 48,431 |
| The Dictator Files: Vladimir Lenin | 0 | - | 4.45 | 26,755 |
| Countries that Border Hungary | 0 | - | 4.98 | 104,073 |
| Countries Bordering Serbia | 0 | - | 4.96 | 92,223 |
| French Geography Quiz #1 | 0 | - | 4.89 | 34,703 |
| Countries Bordering Austria | 0 | - | 4.97 | 118,166 |
| Countries that Visit France the Most | 0 | - | 4.85 | 45,776 |
| Countries Closest to Metropolitan France | 0 | - | 4.89 | 72,075 |
| Country Quiz on a Map - France | 0 | - | 4.98 | 47,030 |
| Famous Germans by Picture | 0 | - | 4.12 | 16,817 |
| Greek Mythology General Knowledge #2 | 0 | - | 4.59 | 73,436 |
| Ancient Greece - Multiple Choice | 0 | - | 4.54 | 41,598 |
| Counties of Ireland | 0 | - | 4.92 | 194,536 |
| Italy A-Z | 0 | - | 4.49 | 58,135 |
| Countries Bordering Italy | 0 | - | 4.94 | 100,735 |
| Countries that Beat Italy | 0 | - | 4.85 | 54,289 |
| Countries Closest to Italy | 0 | - | 4.97 | 197,665 |
| Ancient Roman Trivia #2 | 0 | - | 4.57 | 38,683 |
| Geography of the Roman Empire | 0 | - | 4.56 | 51,844 |
| Roman Names for Places | 0 | - | 4.62 | 58,160 |
| History of The Netherlands | 0 | - | 4.46 | 17,403 |
| Countries Closest to Iceland | 0 | - | 4.90 | 73,349 |
| Countries that Beat Portugal | 0 | - | 4.86 | 59,120 |
| Geography of the Spanish Empire | 0 | - | 4.49 | 37,111 |
| Countries Closest to Spain | 0 | - | 4.96 | 226,551 |
| Countries that Beat Spain | 0 | - | 4.94 | 62,769 |
| Arthurian Legend | 0 | - | 4.33 | 25,094 |
| The United States... or the United Kingdom? | 0 | - | 4.87 | 98,341 |
| Counties of the UK and Ireland | 0 | - | 4.98 | 130,046 |
| Basic Harry Potter Quiz | 0 | - | 4.56 | 378,365 |
| Middle Earth Geography | 0 | - | 4.56 | 39,740 |
