| Countries of Europe After World War II | 0 | - | 4.99 | 189,063 |
| Neutral European Countries of WWII | 0 | - | 4.91 | 162,039 |
| Two Letter Roman Numerals | 0 | - | 4.97 | 56,398 |
| Countries of Europe Before World War I | 0 | - | 4.99 | 157,156 |
| States of the German Confederation in 1848 | 0 | - | 4.90 | 32,323 |
| Places Where Winston Churchill Said We Would Fight the Nazis | 0 | - | 4.57 | 14,644 |
| Olympian Gods Quiz | 0 | - | 4.96 | 502,836 |
| Countries Closest to Germany A-Z | 0 | - | 4.98 | 27,490 |
| Countries of the Japanese Empire | 0 | - | 4.97 | 104,466 |
| Most-Mentioned Characters in the Iliad | 0 | - | 4.81 | 20,909 |
| The Life of Winston Churchill | 0 | - | 4.16 | 11,861 |
| Countries Italy Declared War On | 0 | - | 4.75 | 43,550 |
| Byzantine History | 0 | - | 4.91 | 28,983 |
| Byzantine Emperors | 0 | - | 4.92 | 14,479 |
| Countries of Europe in 1815 With a Map | 0 | - | 4.99 | 151,035 |
| Countries of Europe in 1848 | 0 | - | 4.98 | 84,544 |
| Countries of Europe in 1870 with a Map | 0 | - | 4.95 | 65,446 |
| Every Country of Europe Since 1815 With a Map | 0 | - | 4.98 | 71,582 |
| Countries of Europe in 1360 with a Map | 0 | - | 4.99 | 57,350 |
| States of Germany Map Quiz | 0 | - | 4.92 | 133,490 |
| States of Germany | 0 | - | 4.95 | 153,897 |
| Germany Immigration by Country | 0 | - | 4.86 | 81,501 |
| Countries Bordering Germany | 0 | - | 4.99 | 371,261 |
| Countries Closest to Spain A-Z | 0 | - | 4.98 | 108,593 |
| Germany Country Quiz | 0 | - | 4.83 | 158,536 |
| Name the English Monarchs | 0 | - | 4.91 | 505,173 |
| The American Revolution | 0 | - | 4.52 | 54,318 |
| Europe Map Quiz | 0 | - | 5.00 | 4,779,399 |
| Category Elimination - European Countries #1 | 0 | - | 4.90 | 90,743 |
| The Reign of Napoleon | 0 | - | 4.54 | 39,083 |
| Countries With the Most German Speakers | 0 | - | 4.89 | 97,988 |
| Letters of the Greek Alphabet | 0 | - | 4.97 | 650,454 |
| Name that Greek Letter | 0 | - | 4.93 | 324,599 |
| Mythology A-Z | 0 | - | 4.31 | 37,345 |
| Count in Roman Numerals - 30 Second Sprint | 0 | - | 4.27 | 103,494 |
| Prime Ministers of the UK | 0 | - | 4.95 | 441,203 |
| Biggest Axis-Controlled Cities | 0 | - | 4.44 | 48,985 |
| Europe by Borders in 30 Seconds | 0 | - | 4.98 | 430,057 |
| Biggest Countries in Europe in 1700 | 0 | - | 4.73 | 58,679 |
| Biggest Cities in Germany in 1910 | 0 | - | 4.41 | 23,536 |
| Countries that Beat Germany | 0 | - | 4.94 | 107,049 |
| Country Quiz on a Map - Germany | 0 | - | 4.95 | 35,409 |
| The Trojan War | 0 | - | 4.83 | 39,920 |
| Greek Mythology General Knowledge #1 | 0 | - | 4.85 | 112,627 |
| Ancient Roman Trivia #1 | 0 | - | 4.85 | 85,448 |
| Roman Emperors | 0 | - | 4.95 | 120,803 |
| Ultimate Harry Potter Name Game | 0 | - | 4.94 | 494,319 |
| Countries That Use the Euro | 0 | - | 4.95 | 106,196 |
| Europe Cities Map Quiz | 0 | - | 4.99 | 365,650 |
| 10 Easternmost Countries in Europe | 0 | - | 4.87 | 116,645 |
| The Only European Country ... | 0 | - | 4.91 | 218,231 |
| European Countries NOT in NATO | 0 | - | 4.91 | 62,092 |
| Germany A-Z | 0 | - | 4.56 | 62,784 |
| History of Germany | 0 | - | 4.39 | 52,937 |
| Modern Countries Conquered by Alexander the Great | 0 | - | 4.90 | 105,770 |
| Ancient Greek Words | 0 | - | 4.93 | 112,198 |
| Roman Numeral Decoding Quiz | 0 | - | 4.94 | 438,913 |
| Countries Closest to the United Kingdom A-Z | 0 | - | 4.96 | 191,386 |
| Name Every Beatles Song | 0 | - | 4.97 | 237,746 |
| Bohemian Rhapsody Lyrics | 0 | - | 4.98 | 292,522 |
| People Buried at Westminster Abbey | 0 | - | 4.67 | 14,287 |
| The Iraq War | 0 | - | 4.47 | 15,689 |
| Flags of Europe Quiz | 0 | - | 4.99 | 1,253,100 |
| Countries of Europe - One Minute Sprint | 0 | - | 4.94 | 1,333,257 |
| 10 Biggest European Countries by Area | 0 | - | 4.99 | 193,246 |
| 10 Westernmost Countries in Europe | 0 | - | 4.96 | 151,804 |
| Top 10 Languages Spoken in Europe | 0 | - | 4.96 | 220,136 |
| European Landmarks Map Quiz | 0 | - | 4.97 | 87,573 |
| Countries of Europe with an Empty Map | 0 | - | 5.00 | 312,056 |
| All First-Level Subdivisions of Europe on a Map | 0 | - | 4.99 | 174,745 |
| Countries with Territory in the Balkans | 0 | - | 4.96 | 89,899 |
| Eastern Europe Map Quiz | 0 | - | 4.91 | 128,607 |
| Slavic Countries | 0 | - | 4.96 | 112,148 |
| History of Russia Quiz | 0 | - | 4.47 | 31,980 |
| Countries of the Soviet Union | 0 | - | 4.98 | 195,346 |
| Soviet Union Country Quiz | 0 | - | 4.91 | 81,015 |
| Figures from Greek Mythology | 0 | - | 4.91 | 188,278 |
| History of Italy | 0 | - | 4.55 | 32,104 |
| Modern-Day Countries of the Roman Empire on a Map | 0 | - | 4.99 | 126,485 |
| Geography of the Dutch Empire | 0 | - | 4.62 | 34,772 |
| Countries of the Spanish Empire | 0 | - | 4.52 | 77,371 |
| Counties of England | 0 | - | 4.97 | 800,956 |
| Invasions of Great Britain | 0 | - | 4.51 | 60,034 |
| The Thirteen Dwarves in the Hobbit | 0 | - | 4.81 | 28,764 |
| Lord of the Rings Decoder | 0 | - | 4.61 | 42,740 |
| "Big Five" European Soccer Champions Since 2000 | 0 | - | 4.97 | 359,873 |
| Champions League Winners | 0 | - | 4.92 | 1,012,648 |
| Prime Ministers of Australia | 0 | - | 4.51 | 32,128 |
| Canadian Prime Ministers | 0 | - | 4.64 | 57,791 |
| European Geography By Letter - P #1 | 0 | - | 4.81 | 98,509 |
| Top 10 Coldest European Countries | 0 | - | 4.94 | 193,571 |
| Top 10 Hottest European Countries | 0 | - | 4.88 | 127,515 |
| European Diaspora - Top 11 Countries | 0 | - | 4.90 | 96,287 |
| 10 European Countries with the Most Tourists | 0 | - | 4.98 | 138,202 |
| Three Band Flags of Europe | 0 | - | 4.98 | 194,133 |
| Top 10 Biggest Economies in Europe | 0 | - | 4.98 | 200,189 |
| Pixelated Europe Map | 0 | - | 4.88 | 123,247 |
| Monarchies of Europe | 0 | - | 4.90 | 98,588 |
| European Countries with One Border | 0 | - | 4.97 | 183,456 |
| European Countries with the Fewest Borders | 0 | - | 4.97 | 180,210 |
| Category Elimination - European Geography #1 | 0 | - | 4.98 | 234,993 |
| European Map without 10 Random Countries | 0 | - | 4.97 | 278,065 |
| European Geography By Letter - B #2 | 0 | - | 4.86 | 88,149 |
| Category Elimination - European Geography #2 | 0 | - | 4.99 | 168,321 |
| Name a Valid European Country #1 | 0 | - | 4.99 | 263,481 |
| Name a Valid European Country #2 | 0 | - | 4.94 | 115,531 |
| Russia Country Quiz | 0 | - | 4.83 | 115,111 |
| Federal Subjects of Russia | 0 | - | 4.95 | 148,747 |
| Countries That Border Russia | 0 | - | 4.98 | 463,804 |
| Soviet Leaders 1917–1991 | 0 | - | 4.44 | 95,378 |
| Croatia Country Quiz | 0 | - | 4.83 | 43,597 |
| Countries Formerly in Yugoslavia | 0 | - | 4.95 | 125,302 |
| Bosnia and Herzegovina Country Quiz | 0 | - | 4.86 | 35,499 |
| History of Austria | 0 | - | 4.70 | 17,946 |
| Andorra Country Quiz | 0 | - | 4.91 | 31,867 |
| Regions of France Map Quiz | 0 | - | 4.97 | 145,267 |
| France Cities Map Quiz | 0 | - | 4.96 | 167,487 |
| Departments of France | 0 | - | 4.93 | 54,813 |
| Geography of the French Empire | 0 | - | 4.45 | 27,191 |
| The French Revolution | 0 | - | 4.47 | 24,105 |
| Countries Bordering France | 0 | - | 4.83 | 404,260 |
| History of France | 0 | - | 4.61 | 57,443 |
| Most Popular Baby Girls Names in Germany | 0 | - | 4.51 | 38,934 |
| Germany Cities Map Quiz | 0 | - | 4.87 | 126,866 |
| German History A-Z | 0 | - | 4.49 | 24,790 |
| Ancient Greek Trivia | 0 | - | 4.62 | 67,164 |
| Geography of Ancient Greece | 0 | - | 4.69 | 31,997 |
| Regions of Italy | 0 | - | 4.92 | 76,616 |
| Regions of Italy Map Quiz | 0 | - | 4.96 | 149,985 |
| Italy Cities Map Quiz | 0 | - | 4.97 | 152,848 |
| Countries Surrounding Rome | 0 | - | 4.97 | 49,691 |
| Netherlands Immigration by Country | 0 | - | 4.93 | 52,629 |
| The Vikings! | 0 | - | 4.46 | 28,387 |
| The Portuguese Empire | 0 | - | 4.58 | 12,093 |
| Spain Cities Map Quiz | 0 | - | 4.87 | 97,298 |
| Regions of Spain Quiz | 0 | - | 4.90 | 114,951 |
| Regions of Spain Map Quiz | 0 | - | 4.95 | 186,553 |
| Cantons of Switzerland | 0 | - | 4.98 | 51,575 |
| Countries and Territories of the United Kingdom | 0 | - | 4.90 | 94,347 |
| Modern-Day Countries of the British Empire in 1921 | 0 | - | 4.99 | 118,401 |
| Wives of King Henry VIII | 0 | - | 4.55 | 53,434 |
| Countries the UK Declared War On | 0 | - | 4.55 | 123,089 |
| Geography of the British Empire | 0 | - | 4.48 | 39,809 |
| Medieval English History | 0 | - | 4.53 | 43,616 |
| Countries "Ruled" by King Charles III | 0 | - | 4.78 | 82,827 |
| 10 Closest Megacities to London | 0 | - | 4.90 | 17,801 |
| England or Wales? | 0 | - | 4.94 | 45,879 |
| All UEFA Champions League Teams Ever | 0 | - | 4.85 | 131,544 |
| Asian Countries with the Most Christians | 0 | - | 4.86 | 97,728 |
| Top 10 Biggest Economies in Asia | 0 | - | 4.87 | 136,425 |
| The Vietnam War | 0 | - | 4.44 | 35,617 |
| Countries of the Mongol Empire on a Map | 0 | - | 4.99 | 107,308 |
| African Countries with the Most Christians | 0 | - | 4.94 | 75,925 |
| Top 10 Biggest Economies in Africa | 0 | - | 4.99 | 121,026 |
| Biggest Trading Partners – Australia | 0 | - | 4.93 | 61,845 |
| Arms Exports - United States | 0 | - | 4.77 | 62,628 |
| U.S. Presidents Quiz | 0 | - | 5.00 | 3,717,590 |
| Deadliest U.S. Wars | 0 | - | 4.89 | 191,540 |
| U.S. Civil War Decoder | 0 | - | 4.14 | 25,320 |
| Countries That Touch the Adriatic Sea | 0 | - | 4.96 | 71,279 |
| Top 10 European Countries by Coastline | 0 | - | 4.88 | 138,612 |
| Top 10 Richest Countries in Europe | 0 | - | 4.90 | 150,276 |
| 100 Longest Rivers in Europe - with a Map | 0 | - | 4.94 | 65,759 |
| Biggest Trading Partners - European Union | 0 | - | 4.91 | 73,100 |
| Countries that Border Poland | 0 | - | 4.99 | 172,900 |
| Non-Bordering Countries Closest to Russia | 0 | - | 4.91 | 83,114 |
| Countries that Beat Russia | 0 | - | 4.81 | 83,351 |
| Countries With the Most Russian Speakers | 0 | - | 4.97 | 102,182 |
| The Dictator Files: Joseph Stalin | 0 | - | 4.37 | 48,609 |
| The Dictator Files: Vladimir Lenin | 0 | - | 4.45 | 26,901 |
| Countries that Border Hungary | 0 | - | 4.98 | 104,870 |
| Countries Bordering Serbia | 0 | - | 4.96 | 92,884 |
| French Geography Quiz #1 | 0 | - | 4.89 | 35,000 |
| Countries Bordering Austria | 0 | - | 4.97 | 118,815 |
| Countries that Visit France the Most | 0 | - | 4.85 | 46,059 |
| Countries Closest to Metropolitan France | 0 | - | 4.89 | 72,368 |
| Country Quiz on a Map - France | 0 | - | 4.98 | 47,553 |
| Famous Germans by Picture | 0 | - | 4.12 | 16,879 |
| Greek Mythology General Knowledge #2 | 0 | - | 4.59 | 74,123 |
| Ancient Greece - Multiple Choice | 0 | - | 4.54 | 41,779 |
| Counties of Ireland | 0 | - | 4.92 | 196,757 |
| Italy A-Z | 0 | - | 4.49 | 58,609 |
| Countries Bordering Italy | 0 | - | 4.94 | 101,144 |
| Countries that Beat Italy | 0 | - | 4.85 | 54,994 |
| Countries Closest to Italy | 0 | - | 4.97 | 199,005 |
| Ancient Roman Trivia #2 | 0 | - | 4.60 | 43,976 |
| Geography of the Roman Empire | 0 | - | 4.56 | 52,142 |
| Roman Names for Places | 0 | - | 4.62 | 58,594 |
| History of The Netherlands | 0 | - | 4.46 | 17,522 |
| Countries Closest to Iceland | 0 | - | 4.90 | 73,936 |
| Countries that Beat Portugal | 0 | - | 4.86 | 59,704 |
| Geography of the Spanish Empire | 0 | - | 4.49 | 37,274 |
| Countries Closest to Spain | 0 | - | 4.96 | 227,735 |
| Countries that Beat Spain | 0 | - | 4.94 | 63,212 |
| Arthurian Legend | 0 | - | 4.33 | 25,143 |
| The United States... or the United Kingdom? | 0 | - | 4.87 | 98,907 |
| Counties of the UK and Ireland | 0 | - | 4.98 | 131,828 |
| Basic Harry Potter Quiz | 0 | - | 4.56 | 379,396 |
| Middle Earth Geography | 0 | - | 4.56 | 39,919 |
| Lord of the Rings Trivia | 0 | - | 4.53 | 81,687 |
