| The Trojan War | 0 | - | 4.83 | 39,729 |
| Greek Mythology General Knowledge #1 | 0 | - | 4.85 | 111,860 |
| Name the English Monarchs | 0 | - | 4.91 | 502,706 |
| Modern Day Countries of the Dutch Empire on a Map | 0 | - | 4.86 | 61,126 |
| Countries of Iberia in History with a Map | 0 | - | 4.87 | 41,868 |
| Modern Day Countries of the Spanish Empire on a Map | 0 | - | 4.95 | 86,285 |
| States of the German Confederation in 1848 | 0 | - | 4.89 | 32,012 |
| Ancient Roman Trivia #1 | 0 | - | 4.85 | 84,536 |
| Roman Emperors | 0 | - | 4.95 | 120,059 |
| 101 Figures from Greek Mythology | 0 | - | 4.99 | 126,004 |
| Countries of Europe in 1815 With a Map | 0 | - | 4.99 | 150,369 |
| Countries of Europe in 1848 | 0 | - | 4.99 | 81,917 |
| Countries of Europe in 1870 with a Map | 0 | - | 4.95 | 64,686 |
| Every Country of Europe Since 1815 With a Map | 0 | - | 4.98 | 71,023 |
| Countries of Europe in 1360 with a Map | 0 | - | 4.99 | 56,895 |
| Europe Map Quiz | 0 | - | 5.00 | 4,763,313 |
| Countries Bordering France | 0 | - | 4.83 | 402,564 |
| Countries Bordering Germany | 0 | - | 4.99 | 369,429 |
| Greek Mythology General Knowledge #2 | 0 | - | 4.59 | 73,677 |
| Biggest Countries in Europe in 1700 | 0 | - | 4.73 | 58,494 |
| Andorra Country Quiz | 0 | - | 4.90 | 31,691 |
| France Cities Map Quiz | 0 | - | 4.96 | 166,773 |
| Departments of France | 0 | - | 4.93 | 54,119 |
| Germany Country Quiz | 0 | - | 4.83 | 157,865 |
| Germany Cities Map Quiz | 0 | - | 4.87 | 126,352 |
| Italy Country Quiz | 0 | - | 4.80 | 123,412 |
| Regions of Italy Map Quiz | 0 | - | 4.96 | 149,390 |
| Italy Cities Map Quiz | 0 | - | 4.97 | 152,066 |
| Countries Surrounding Rome | 0 | - | 4.97 | 49,549 |
| Spain Cities Map Quiz | 0 | - | 4.87 | 96,940 |
| Regions of Spain Map Quiz | 0 | - | 4.95 | 185,651 |
| Modern-Day Countries of the British Empire in 1921 | 0 | - | 4.99 | 117,628 |
| England or Wales? | 0 | - | 4.94 | 45,692 |
| Europe by Borders in 30 Seconds | 0 | - | 4.98 | 428,245 |
| French Geography Quiz #1 | 0 | - | 4.89 | 34,772 |
| Countries Bordering Austria | 0 | - | 4.97 | 118,325 |
| Countries that Visit France the Most | 0 | - | 4.85 | 45,873 |
| Countries Closest to Metropolitan France | 0 | - | 4.89 | 72,181 |
| Countries With the Most German Speakers | 0 | - | 4.89 | 96,727 |
| Counties of Ireland | 0 | - | 4.92 | 195,300 |
| Countries Bordering Italy | 0 | - | 4.94 | 100,868 |
| Countries Closest to Italy | 0 | - | 4.97 | 198,054 |
| Nordic Cities Map Quiz | 0 | - | 4.77 | 90,465 |
| Countries Closest to Spain | 0 | - | 4.96 | 226,999 |
| Counties of the UK and Ireland | 0 | - | 4.98 | 130,753 |
| World Capitals Closest to London | 0 | - | 4.88 | 110,658 |
| 50 Busiest Air Routes from London | 0 | - | 4.87 | 96,845 |
| Countries that Beat Germany | 0 | - | 4.94 | 106,442 |
| Ancient Greek Trivia | 0 | - | 4.62 | 66,999 |
| Geography of Ancient Greece | 0 | - | 4.69 | 31,913 |
| Letters of the Greek Alphabet | 0 | - | 4.97 | 647,480 |
| Name that Greek Letter | 0 | - | 4.93 | 323,467 |
| Countries Italy Declared War On | 0 | - | 4.75 | 43,334 |
| Countries that Beat Italy | 0 | - | 4.85 | 54,494 |
| Denmark Country Quiz | 0 | - | 4.78 | 75,922 |
| Finland Country Quiz | 0 | - | 4.50 | 59,681 |
| Norway Country Quiz | 0 | - | 4.44 | 77,344 |
| Iceland Country Quiz | 0 | - | 4.69 | 43,163 |
| Countries Closest to Iceland | 0 | - | 4.90 | 73,583 |
| Countries that Beat Portugal | 0 | - | 4.86 | 59,348 |
| Countries that Beat Spain | 0 | - | 4.94 | 62,947 |
| Medieval English History | 0 | - | 4.53 | 43,510 |
| Countries That Use the Euro | 0 | - | 4.95 | 105,046 |
| Europe Cities Map Quiz | 0 | - | 4.99 | 364,495 |
| 10 Easternmost Countries in Europe | 0 | - | 4.89 | 115,265 |
| The Only European Country ... | 0 | - | 4.91 | 216,652 |
| European Countries NOT in NATO | 0 | - | 4.90 | 61,151 |
| History of Russia Quiz | 0 | - | 4.47 | 31,919 |
| Ancient Greece - Multiple Choice | 0 | - | 4.54 | 41,663 |
| History of Italy | 0 | - | 4.55 | 31,977 |
| Ancient Roman Trivia #2 | 0 | - | 4.57 | 38,749 |
| Geography of the Roman Empire | 0 | - | 4.56 | 51,936 |
| Roman Names for Places | 0 | - | 4.62 | 58,291 |
| Geography of the Dutch Empire | 0 | - | 4.62 | 34,661 |
| Greenland Country Quiz | 0 | - | 4.78 | 36,376 |
| Countries that Beat Iceland | 0 | - | 4.82 | 42,870 |
| Countries of the Spanish Empire | 0 | - | 4.52 | 77,237 |
| Invasions of Great Britain | 0 | - | 4.51 | 59,867 |
| The Reign of Queen Elizabeth I | 0 | - | 4.53 | 31,793 |
| Houses of British Monarchs | 0 | - | 4.53 | 65,676 |
| British History Multiple Choice #1 | 0 | - | 4.46 | 55,149 |
| British History Multiple Choice #2 | 0 | - | 4.42 | 37,963 |
| Flags of Europe Quiz | 0 | - | 4.99 | 1,244,297 |
| Countries of Europe - One Minute Sprint | 0 | - | 4.94 | 1,328,786 |
| 10 Biggest European Countries by Area | 0 | - | 4.99 | 192,677 |
| 10 Westernmost Countries in Europe | 0 | - | 4.96 | 151,215 |
| Top 10 Languages Spoken in Europe | 0 | - | 4.96 | 218,732 |
| European Landmarks Map Quiz | 0 | - | 4.97 | 87,154 |
| Countries of Europe with an Empty Map | 0 | - | 5.00 | 310,527 |
| All First-Level Subdivisions of Europe on a Map | 0 | - | 4.99 | 171,905 |
| Countries with Territory in the Balkans | 0 | - | 4.96 | 89,297 |
| Eastern Europe Map Quiz | 0 | - | 4.91 | 128,196 |
| Slavic Countries | 0 | - | 4.96 | 111,669 |
| Olympian Gods Quiz | 0 | - | 4.96 | 500,871 |
| Ancient Greek Words | 0 | - | 4.93 | 111,616 |
| Counties of England | 0 | - | 4.97 | 796,863 |
| "Big Five" European Soccer Champions Since 2000 | 0 | - | 4.97 | 356,031 |
| The Reign of Napoleon | 0 | - | 4.54 | 38,957 |
| States of the Holy Roman Empire in 1356 | 0 | - | 4.98 | 74,237 |
| Ancient Greece A-Z | 0 | - | 4.60 | 23,145 |
| Roman Numeral Decoding Quiz | 0 | - | 4.94 | 437,148 |
| Two Letter Roman Numerals | 0 | - | 4.97 | 56,138 |
| Sweden Country Quiz | 0 | - | 4.35 | 68,216 |
| UK Cities Map Quiz | 0 | - | 4.96 | 464,582 |
| Embarrassing Chapters in British History | 0 | - | 4.29 | 32,264 |
| British History Quiz for Dummies | 0 | - | 4.70 | 78,610 |
| History of Scotland | 0 | - | 4.51 | 21,093 |
| Champions League Winners | 0 | - | 4.92 | 1,006,845 |
| European Diaspora - Top 11 Countries | 0 | - | 4.90 | 95,867 |
| 10 European Countries with the Most Tourists | 0 | - | 4.98 | 137,540 |
| Three Band Flags of Europe | 0 | - | 4.98 | 193,331 |
| Pixelated Europe Map | 0 | - | 4.88 | 122,768 |
| Monarchies of Europe | 0 | - | 4.90 | 98,154 |
| European Countries with One Border | 0 | - | 4.97 | 182,788 |
| European Countries with the Fewest Borders | 0 | - | 4.97 | 179,584 |
| European Geography By Letter - B #2 | 0 | - | 4.85 | 78,601 |
| Federal Subjects of Russia | 0 | - | 4.95 | 147,240 |
| Countries That Border Russia | 0 | - | 4.98 | 461,758 |
| Countries Formerly in Yugoslavia | 0 | - | 4.95 | 124,908 |
| History of Austria | 0 | - | 4.70 | 17,863 |
| Austria Country Quiz | 0 | - | 4.57 | 59,741 |
| Belgium Country Quiz | 0 | - | 4.73 | 71,804 |
| France Country Quiz | 0 | - | 4.70 | 134,983 |
| Regions of France Map Quiz | 0 | - | 4.97 | 144,448 |
| Geography of the French Empire | 0 | - | 4.45 | 27,060 |
| The French Revolution | 0 | - | 4.47 | 23,935 |
| Kings of France Quiz | 0 | - | 4.20 | 32,746 |
| History of France | 0 | - | 4.59 | 56,984 |
| States of Germany Map Quiz | 0 | - | 4.91 | 132,825 |
| States of Germany | 0 | - | 4.96 | 152,617 |
| Germany Immigration by Country | 0 | - | 4.85 | 81,046 |
| Greece Country Quiz | 0 | - | 4.74 | 66,261 |
| The Life of Alexander the Great | 0 | - | 4.51 | 18,501 |
| Regions of Italy | 0 | - | 4.92 | 75,888 |
| Seven Hills of Rome | 0 | - | 4.70 | 9,183 |
| Luxembourg Country Quiz | 0 | - | 4.78 | 33,750 |
| Monaco Country Quiz | 0 | - | 4.47 | 41,509 |
| Netherlands Country Quiz | 0 | - | 4.53 | 80,533 |
| Netherlands Immigration by Country | 0 | - | 4.93 | 52,178 |
| The Vikings! | 0 | - | 4.46 | 28,343 |
| Sweden Immigration by Country | 0 | - | 4.55 | 56,131 |
| Portugal Country Quiz | 0 | - | 4.69 | 71,906 |
| The Portuguese Empire | 0 | - | 4.58 | 12,066 |
| Spain Country Quiz | 0 | - | 4.44 | 128,543 |
| Regions of Spain Quiz | 0 | - | 4.90 | 113,954 |
| Switzerland Country Quiz | 0 | - | 4.51 | 63,372 |
| Cantons of Switzerland | 0 | - | 4.98 | 51,214 |
| Countries and Territories of the United Kingdom | 0 | - | 4.90 | 94,005 |
| United Kingdom A-Z | 0 | - | 4.52 | 88,041 |
| Largest Islands in the British Isles With a Map | 0 | - | 4.52 | 38,731 |
| Wives of King Henry VIII | 0 | - | 4.55 | 53,353 |
| English Royal Consorts | 0 | - | 4.38 | 37,354 |
| Countries the UK Declared War On | 0 | - | 4.61 | 122,485 |
| Geography of the British Empire | 0 | - | 4.48 | 39,674 |
| 10 Closest Megacities to London | 0 | - | 4.90 | 17,701 |
| Counties of Wales | 0 | - | 4.63 | 39,303 |
| Countries of the Mongol Empire on a Map | 0 | - | 4.99 | 106,872 |
| Top 10 Coldest European Countries | 0 | - | 4.94 | 193,123 |
| Top 10 Hottest European Countries | 0 | - | 4.88 | 127,018 |
| Category Elimination - European Geography #1 | 0 | - | 4.98 | 233,284 |
| European Map without 10 Random Countries | 0 | - | 4.97 | 276,839 |
| Category Elimination - European Geography #2 | 0 | - | 4.99 | 167,144 |
| Name a Valid European Country #1 | 0 | - | 4.99 | 261,043 |
| Name a Valid European Country #2 | 0 | - | 4.94 | 114,726 |
| Russia Country Quiz | 0 | - | 4.85 | 114,496 |
| Croatia Country Quiz | 0 | - | 4.83 | 43,345 |
| Bosnia and Herzegovina Country Quiz | 0 | - | 4.86 | 35,344 |
| Most Popular Baby Girls Names in Germany | 0 | - | 4.51 | 38,799 |
| Figures from Greek Mythology | 0 | - | 4.91 | 186,983 |
| History of Ireland | 0 | - | 4.39 | 31,185 |
| Byzantine History | 0 | - | 4.91 | 28,868 |
| Byzantine Emperors | 0 | - | 4.92 | 14,138 |
| History of The Netherlands | 0 | - | 4.46 | 17,436 |
| Biggest Spanish Empire Countries | 0 | - | 4.91 | 115,996 |
| Countries Bordering Spain | 0 | - | 4.51 | 69,436 |
| UK Immigration by Country | 0 | - | 4.94 | 140,910 |
| United Kingdom Country Quiz | 0 | - | 4.96 | 139,809 |
| British Monopoly Board | 0 | - | 4.52 | 41,169 |
| All UEFA Champions League Teams Ever | 0 | - | 4.85 | 130,368 |
| U.S. Presidents Quiz | 0 | - | 5.00 | 3,698,956 |
| Deadliest U.S. Wars | 0 | - | 4.89 | 190,802 |
| Anglo-Saxon and Viking Kings of England | 0 | - | 4.74 | 12,214 |
| Countries That Touch the Adriatic Sea | 0 | - | 4.96 | 71,113 |
| European Countries with the Fewest Overnight Visitors | 0 | - | 4.80 | 41,656 |
| Top 10 European Countries by Coastline | 0 | - | 4.87 | 138,389 |
| Top 20 Football Clubs in Europe | 0 | - | 4.48 | 114,982 |
| 100 Longest Rivers in Europe - with a Map | 0 | - | 4.94 | 65,454 |
| Category Elimination - European Countries #1 | 0 | - | 4.89 | 90,063 |
| The Only Remaining European Country . . . | 0 | - | 4.41 | 64,270 |
| Countries that Border Poland | 0 | - | 4.99 | 172,284 |
| Non-Bordering Countries Closest to Russia | 0 | - | 4.91 | 82,853 |
| Countries that Beat Russia | 0 | - | 4.81 | 82,799 |
| Countries With the Most Russian Speakers | 0 | - | 4.97 | 100,873 |
| Countries that Border Hungary | 0 | - | 4.98 | 104,234 |
| North Macedonia Country Quiz | 0 | - | 4.81 | 27,877 |
| Moldova Country Quiz | 0 | - | 4.82 | 30,807 |
| Countries Bordering Serbia | 0 | - | 4.96 | 92,404 |
| Modern Day Countries of Austria-Hungary on a Map | 0 | - | 4.98 | 103,786 |
| 20 Questions About France | 0 | - | 4.11 | 32,410 |
| Countries that Beat France | 0 | - | 4.49 | 75,852 |
