| Name the English Monarchs | 0 | - | 4.91 | 502,770 |
| The Trojan War | 0 | - | 4.83 | 39,732 |
| Greek Mythology General Knowledge #1 | 0 | - | 4.85 | 111,869 |
| Ancient Roman Trivia #1 | 0 | - | 4.85 | 84,538 |
| Roman Emperors | 0 | - | 4.95 | 120,068 |
| Countries Bordering France | 0 | - | 4.83 | 402,591 |
| France Cities Map Quiz | 0 | - | 4.96 | 166,778 |
| Countries that Visit France the Most | 0 | - | 4.85 | 45,876 |
| Countries Closest to Metropolitan France | 0 | - | 4.89 | 72,182 |
| Modern Day Countries of the Dutch Empire on a Map | 0 | - | 4.86 | 61,129 |
| Countries of Iberia in History with a Map | 0 | - | 4.87 | 41,873 |
| Modern Day Countries of the Spanish Empire on a Map | 0 | - | 4.95 | 86,291 |
| The Reign of Napoleon | 0 | - | 4.54 | 38,959 |
| States of the German Confederation in 1848 | 0 | - | 4.89 | 32,016 |
| Ancient Greek Trivia | 0 | - | 4.62 | 67,001 |
| Geography of Ancient Greece | 0 | - | 4.69 | 31,913 |
| Medieval English History | 0 | - | 4.53 | 43,511 |
| Countries of Europe in 1815 With a Map | 0 | - | 4.99 | 150,416 |
| Countries of Europe in 1848 | 0 | - | 4.99 | 81,978 |
| Countries of Europe in 1870 with a Map | 0 | - | 4.95 | 64,703 |
| Every Country of Europe Since 1815 With a Map | 0 | - | 4.98 | 71,032 |
| Countries of Europe in 1360 with a Map | 0 | - | 4.99 | 56,903 |
| Regions of France Map Quiz | 0 | - | 4.97 | 144,453 |
| Kings of France Quiz | 0 | - | 4.20 | 32,749 |
| Bohemian Rhapsody Lyrics | 0 | - | 4.98 | 291,738 |
| Andorra Country Quiz | 0 | - | 4.90 | 31,695 |
| Departments of France | 0 | - | 4.93 | 54,132 |
| French History Multiple Choice | 0 | - | 4.55 | 33,044 |
| Germany Country Quiz | 0 | - | 4.83 | 157,875 |
| Germany Cities Map Quiz | 0 | - | 4.87 | 126,360 |
| Countries Bordering Germany | 0 | - | 4.99 | 369,450 |
| Greek Mythology General Knowledge #2 | 0 | - | 4.59 | 73,681 |
| Ancient Greece - Multiple Choice | 0 | - | 4.54 | 41,664 |
| Regions of Italy Map Quiz | 0 | - | 4.96 | 149,412 |
| Italy Cities Map Quiz | 0 | - | 4.97 | 152,069 |
| Countries Surrounding Rome | 0 | - | 4.97 | 49,549 |
| Ancient Roman Trivia #2 | 0 | - | 4.57 | 38,751 |
| Geography of the Roman Empire | 0 | - | 4.56 | 51,937 |
| Roman Names for Places | 0 | - | 4.62 | 58,298 |
| Spain Cities Map Quiz | 0 | - | 4.87 | 96,943 |
| Regions of Spain Map Quiz | 0 | - | 4.95 | 185,671 |
| Modern-Day Countries of the British Empire in 1921 | 0 | - | 4.99 | 117,637 |
| Wonderwall Lyrics | 0 | - | 4.25 | 73,774 |
| The Reign of Queen Elizabeth I | 0 | - | 4.53 | 31,795 |
| Houses of British Monarchs | 0 | - | 4.53 | 65,680 |
| British History Multiple Choice #1 | 0 | - | 4.46 | 55,152 |
| British History Multiple Choice #2 | 0 | - | 4.42 | 37,964 |
| England or Wales? | 0 | - | 4.94 | 45,698 |
| Europe Map Quiz | 0 | - | 5.00 | 4,763,532 |
| Biggest Countries in Europe in 1700 | 0 | - | 4.73 | 58,499 |
| French Geography Quiz #1 | 0 | - | 4.89 | 34,776 |
| Countries Bordering Austria | 0 | - | 4.97 | 118,330 |
| France Country Quiz | 0 | - | 4.70 | 134,996 |
| Countries With the Most German Speakers | 0 | - | 4.89 | 96,744 |
| Counties of Ireland | 0 | - | 4.92 | 195,330 |
| Countries Bordering Italy | 0 | - | 4.94 | 100,871 |
| Countries Closest to Italy | 0 | - | 4.97 | 198,061 |
| Countries Closest to Spain | 0 | - | 4.96 | 227,007 |
| Counties of the UK and Ireland | 0 | - | 4.98 | 130,791 |
| Embarrassing Chapters in British History | 0 | - | 4.29 | 32,265 |
| History of Scotland | 0 | - | 4.51 | 21,095 |
| World Capitals Closest to London | 0 | - | 4.88 | 110,663 |
| 50 Busiest Air Routes from London | 0 | - | 4.87 | 96,851 |
| Europe by Borders in 30 Seconds | 0 | - | 4.98 | 428,258 |
| Countries that Beat Germany | 0 | - | 4.94 | 106,456 |
| The Life of Alexander the Great | 0 | - | 4.51 | 18,504 |
| Letters of the Greek Alphabet | 0 | - | 4.97 | 647,555 |
| Name that Greek Letter | 0 | - | 4.93 | 323,476 |
| Countries that Beat Italy | 0 | - | 4.85 | 54,499 |
| Seven Hills of Rome | 0 | - | 4.70 | 9,183 |
| Countries that Beat Portugal | 0 | - | 4.86 | 59,352 |
| Countries that Beat Spain | 0 | - | 4.94 | 62,952 |
| Commonwealth of Nations Countries | 0 | - | 4.94 | 237,428 |
| English Royal Consorts | 0 | - | 4.38 | 37,361 |
| Europe Cities Map Quiz | 0 | - | 4.99 | 364,510 |
| Countries that Beat France | 0 | - | 4.49 | 75,859 |
| French History A-Z | 0 | - | 4.27 | 24,650 |
| Olympian Gods Quiz | 0 | - | 4.96 | 500,912 |
| 101 Figures from Greek Mythology | 0 | - | 4.99 | 126,026 |
| Countries Italy Declared War On | 0 | - | 4.75 | 43,334 |
| Countries That Use the Euro | 0 | - | 4.95 | 105,061 |
| Flags of Europe Quiz | 0 | - | 4.99 | 1,244,413 |
| Countries of Europe - One Minute Sprint | 0 | - | 4.94 | 1,328,839 |
| 10 Easternmost Countries in Europe | 0 | - | 4.89 | 115,281 |
| The Only European Country ... | 0 | - | 4.91 | 216,679 |
| European Countries NOT in NATO | 0 | - | 4.90 | 61,160 |
| History of Russia Quiz | 0 | - | 4.47 | 31,919 |
| 20 Questions About France | 0 | - | 4.11 | 32,410 |
| Ancient Greek Words | 0 | - | 4.93 | 111,626 |
| History of Italy | 0 | - | 4.55 | 31,979 |
| Geography of the Dutch Empire | 0 | - | 4.62 | 34,663 |
| Countries of the Spanish Empire | 0 | - | 4.52 | 77,240 |
| Counties of England | 0 | - | 4.97 | 796,945 |
| Invasions of Great Britain | 0 | - | 4.51 | 59,868 |
| Oldest Cities in the United Kingdom | 0 | - | 4.39 | 23,718 |
| Name Every Beatles Song | 0 | - | 4.97 | 236,312 |
| History of London | 0 | - | 4.33 | 26,194 |
| British History Quiz for Dummies | 0 | - | 4.70 | 78,617 |
| "Big Five" European Soccer Champions Since 2000 | 0 | - | 4.97 | 356,080 |
| 10 Biggest European Countries by Area | 0 | - | 4.99 | 192,683 |
| 10 Westernmost Countries in Europe | 0 | - | 4.96 | 151,220 |
| Top 10 Languages Spoken in Europe | 0 | - | 4.96 | 218,747 |
| European Landmarks Map Quiz | 0 | - | 4.97 | 87,163 |
| Countries of Europe with an Empty Map | 0 | - | 5.00 | 310,590 |
| All First-Level Subdivisions of Europe on a Map | 0 | - | 4.98 | 171,928 |
| Countries with Territory in the Balkans | 0 | - | 4.96 | 89,304 |
| Eastern Europe Map Quiz | 0 | - | 4.91 | 128,204 |
| Slavic Countries | 0 | - | 4.96 | 111,670 |
| Countries that have Won the Most Eurovisions | 0 | - | 4.56 | 102,011 |
| States of the Holy Roman Empire in 1356 | 0 | - | 4.98 | 74,261 |
| Ancient Greece A-Z | 0 | - | 4.60 | 23,147 |
| Ancient Greek Inventions | 0 | - | 4.18 | 16,348 |
| Roman Numeral Decoding Quiz | 0 | - | 4.94 | 437,193 |
| Two Letter Roman Numerals | 0 | - | 4.97 | 56,142 |
| UK Cities Map Quiz | 0 | - | 4.96 | 464,599 |
| Imagine Lyrics | 0 | - | 4.53 | 43,282 |
| The Reign of Henry VIII | 0 | - | 4.25 | 27,756 |
| Elizabeth I... or Elizabeth II? | 0 | - | 4.30 | 24,504 |
| Champions League Winners | 0 | - | 4.92 | 1,006,928 |
| Countries of the Mongol Empire on a Map | 0 | - | 4.99 | 106,875 |
| Top 10 Coldest European Countries | 0 | - | 4.94 | 193,133 |
| Top 10 Hottest European Countries | 0 | - | 4.88 | 127,030 |
| European Diaspora - Top 11 Countries | 0 | - | 4.90 | 95,871 |
| 10 European Countries with the Most Tourists | 0 | - | 4.98 | 137,552 |
| Three Band Flags of Europe | 0 | - | 4.98 | 193,349 |
| Pixelated Europe Map | 0 | - | 4.88 | 122,774 |
| Monarchies of Europe | 0 | - | 4.90 | 98,165 |
| European Countries with One Border | 0 | - | 4.97 | 182,800 |
| European Countries with the Fewest Borders | 0 | - | 4.97 | 179,599 |
| Category Elimination - European Geography #1 | 0 | - | 4.98 | 233,300 |
| European Map without 10 Random Countries | 0 | - | 4.97 | 276,857 |
| European Geography By Letter - B #2 | 0 | - | 4.84 | 78,621 |
| Category Elimination - European Geography #2 | 0 | - | 4.99 | 167,153 |
| Name a Valid European Country #1 | 0 | - | 4.99 | 261,085 |
| Name a Valid European Country #2 | 0 | - | 4.94 | 114,733 |
| Russia Country Quiz | 0 | - | 4.83 | 114,503 |
| Federal Subjects of Russia | 0 | - | 4.95 | 147,294 |
| Countries That Border Russia | 0 | - | 4.98 | 461,778 |
| Croatia Country Quiz | 0 | - | 4.83 | 43,349 |
| Countries Formerly in Yugoslavia | 0 | - | 4.95 | 124,912 |
| Bosnia and Herzegovina Country Quiz | 0 | - | 4.86 | 35,347 |
| History of Austria | 0 | - | 4.70 | 17,863 |
| Austria Country Quiz | 0 | - | 4.57 | 59,752 |
| Belgium Country Quiz | 0 | - | 4.73 | 71,809 |
| Biggest French Empire Countries | 0 | - | 4.49 | 65,168 |
| Geography of the French Empire | 0 | - | 4.45 | 27,061 |
| The French Revolution | 0 | - | 4.47 | 23,937 |
| History of France | 0 | - | 4.59 | 56,991 |
| States of Germany Map Quiz | 0 | - | 4.91 | 132,835 |
| States of Germany | 0 | - | 4.96 | 152,639 |
| Germany Immigration by Country | 0 | - | 4.85 | 81,050 |
| Greece Country Quiz | 0 | - | 4.74 | 66,275 |
| Figures from Greek Mythology | 0 | - | 4.91 | 186,996 |
| History of Ireland | 0 | - | 4.39 | 31,188 |
| Regions of Italy | 0 | - | 4.92 | 75,909 |
| Italy Country Quiz | 0 | - | 4.80 | 123,419 |
| Luxembourg Country Quiz | 0 | - | 4.78 | 33,754 |
| Monaco Country Quiz | 0 | - | 4.47 | 41,511 |
| Netherlands Country Quiz | 0 | - | 4.53 | 80,539 |
| Netherlands Immigration by Country | 0 | - | 4.93 | 52,181 |
| Nordic Cities Map Quiz | 0 | - | 4.77 | 90,465 |
| The Vikings! | 0 | - | 4.46 | 28,344 |
| Sweden Immigration by Country | 0 | - | 4.55 | 56,134 |
| Portugal Country Quiz | 0 | - | 4.69 | 71,915 |
| The Portuguese Empire | 0 | - | 4.58 | 12,066 |
| Spain Country Quiz | 0 | - | 4.44 | 128,551 |
| Regions of Spain Quiz | 0 | - | 4.90 | 113,963 |
| Biggest Spanish Empire Countries | 0 | - | 4.91 | 116,006 |
| Switzerland Country Quiz | 0 | - | 4.51 | 63,374 |
| Cantons of Switzerland | 0 | - | 4.98 | 51,219 |
| UK Immigration by Country | 0 | - | 4.94 | 140,914 |
| United Kingdom Country Quiz | 0 | - | 4.96 | 139,827 |
| Countries and Territories of the United Kingdom | 0 | - | 4.90 | 94,011 |
| United Kingdom A-Z | 0 | - | 4.52 | 88,043 |
| Largest Islands in the British Isles With a Map | 0 | - | 4.52 | 38,733 |
| Wives of King Henry VIII | 0 | - | 4.55 | 53,353 |
| Countries the UK Declared War On | 0 | - | 4.61 | 122,492 |
| Geography of the British Empire | 0 | - | 4.48 | 39,675 |
| Animals in British History | 0 | - | 4.43 | 26,009 |
| 10 Closest Megacities to London | 0 | - | 4.90 | 17,704 |
| Counties of Wales | 0 | - | 4.63 | 39,305 |
| All UEFA Champions League Teams Ever | 0 | - | 4.85 | 130,383 |
| U.S. Presidents Quiz | 0 | - | 5.00 | 3,699,256 |
| Deadliest U.S. Wars | 0 | - | 4.89 | 190,811 |
| O Canada Lyrics | 0 | - | 4.47 | 50,946 |
| Countries That Touch the Adriatic Sea | 0 | - | 4.96 | 71,114 |
| Top 10 European Countries by Coastline | 0 | - | 4.87 | 138,394 |
| 100 Longest Rivers in Europe - with a Map | 0 | - | 4.94 | 65,460 |
| Category Elimination - European Countries #1 | 0 | - | 4.89 | 90,072 |
| Countries that Border Poland | 0 | - | 4.99 | 172,291 |
| Non-Bordering Countries Closest to Russia | 0 | - | 4.91 | 82,857 |
| Countries With the Most Russian Speakers | 0 | - | 4.97 | 100,905 |
| Countries that Border Hungary | 0 | - | 4.98 | 104,236 |
| Countries Bordering Serbia | 0 | - | 4.96 | 92,407 |
| Countries Two Borders Away From France | 0 | - | 4.37 | 27,605 |
| France True or False? | 0 | - | 4.44 | 39,937 |
| Most Popular Baby Girls Names in Germany | 0 | - | 4.51 | 38,802 |
| German Inventions | 0 | - | 3.91 | 30,237 |
| Embarrassing Chapters in German History | 0 | - | 3.40 | 12,633 |
| Countries that Beat Greece | 0 | - | 4.53 | 48,975 |
