| The Trojan War | 0 | - | 4.83 | 39,568 |
| Greek Mythology General Knowledge #1 | 0 | - | 4.85 | 111,170 |
| Letters of the Greek Alphabet | 0 | - | 4.97 | 644,646 |
| Name that Greek Letter | 0 | - | 4.93 | 322,551 |
| Ancient Greek Trivia | 0 | - | 4.62 | 66,871 |
| Geography of Ancient Greece | 0 | - | 4.69 | 31,842 |
| Ancient Roman Trivia #1 | 0 | - | 4.85 | 84,288 |
| Roman Emperors | 0 | - | 4.95 | 119,244 |
| Greek Mythology General Knowledge #2 | 0 | - | 4.59 | 73,253 |
| Ancient Greece - Multiple Choice | 0 | - | 4.54 | 41,539 |
| 101 Figures from Greek Mythology | 0 | - | 4.99 | 125,083 |
| Name the English Monarchs | 0 | - | 4.92 | 500,132 |
| The Life of Alexander the Great | 0 | - | 4.49 | 18,454 |
| Ancient Roman Trivia #2 | 0 | - | 4.57 | 38,630 |
| Geography of the Roman Empire | 0 | - | 4.56 | 51,790 |
| Roman Names for Places | 0 | - | 4.62 | 58,061 |
| Ancient Greek Inventions | 0 | - | 4.17 | 16,312 |
| States of the German Confederation in 1848 | 0 | - | 4.89 | 31,745 |
| Olympian Gods Quiz | 0 | - | 4.96 | 498,434 |
| Medieval English History | 0 | - | 4.53 | 43,403 |
| Countries of Europe in 1815 With a Map | 0 | - | 4.99 | 149,542 |
| Countries of Europe in 1848 | 0 | - | 4.99 | 75,866 |
| Countries of Europe in 1870 with a Map | 0 | - | 4.95 | 63,963 |
| Every Country of Europe Since 1815 With a Map | 0 | - | 4.98 | 70,491 |
| Countries of Europe in 1360 with a Map | 0 | - | 4.99 | 56,382 |
| Countries Bordering France | 0 | - | 4.83 | 401,135 |
| Countries Bordering Germany | 0 | - | 4.99 | 368,012 |
| Ancient Greek Words | 0 | - | 4.93 | 111,101 |
| Seven Hills of Rome | 0 | - | 4.70 | 9,136 |
| The Reign of Queen Elizabeth I | 0 | - | 4.53 | 31,687 |
| Houses of British Monarchs | 0 | - | 4.53 | 65,470 |
| British History Multiple Choice #1 | 0 | - | 4.46 | 55,049 |
| British History Multiple Choice #2 | 0 | - | 4.42 | 37,895 |
| Europe Map Quiz | 0 | - | 5.00 | 4,746,057 |
| France Cities Map Quiz | 0 | - | 4.96 | 165,710 |
| Departments of France | 0 | - | 4.93 | 53,304 |
| Germany Country Quiz | 0 | - | 4.82 | 157,189 |
| Germany Cities Map Quiz | 0 | - | 4.87 | 125,562 |
| Italy Country Quiz | 0 | - | 4.82 | 122,684 |
| Regions of Italy Map Quiz | 0 | - | 4.96 | 148,839 |
| Italy Cities Map Quiz | 0 | - | 4.97 | 151,465 |
| Countries Surrounding Rome | 0 | - | 4.97 | 49,438 |
| Spain Cities Map Quiz | 0 | - | 4.87 | 96,426 |
| Regions of Spain Map Quiz | 0 | - | 4.95 | 185,046 |
| Modern-Day Countries of the British Empire in 1921 | 0 | - | 4.99 | 116,867 |
| England or Wales? | 0 | - | 4.94 | 45,491 |
| Biggest Countries in Europe in 1700 | 0 | - | 4.73 | 58,295 |
| French Geography Quiz #1 | 0 | - | 4.89 | 34,635 |
| Countries Bordering Austria | 0 | - | 4.97 | 118,030 |
| Countries that Visit France the Most | 0 | - | 4.85 | 45,699 |
| Countries Closest to Metropolitan France | 0 | - | 4.89 | 71,977 |
| Countries With the Most German Speakers | 0 | - | 4.89 | 95,417 |
| Greece Country Quiz | 0 | - | 4.74 | 65,987 |
| Ancient Greece A-Z | 0 | - | 4.60 | 23,082 |
| Counties of Ireland | 0 | - | 4.92 | 194,039 |
| Countries Bordering Italy | 0 | - | 4.94 | 100,637 |
| Countries Closest to Italy | 0 | - | 4.97 | 196,905 |
| Countries Closest to Spain | 0 | - | 4.96 | 226,230 |
| Counties of the UK and Ireland | 0 | - | 4.98 | 129,493 |
| Embarrassing Chapters in British History | 0 | - | 4.29 | 32,185 |
| History of Scotland | 0 | - | 4.51 | 21,046 |
| World Capitals Closest to London | 0 | - | 4.87 | 110,058 |
| 50 Busiest Air Routes from London | 0 | - | 4.87 | 96,009 |
| Europe by Borders in 30 Seconds | 0 | - | 4.98 | 426,567 |
| Andorra Country Quiz | 0 | - | 4.90 | 31,535 |
| Kings of France Quiz | 0 | - | 4.20 | 32,631 |
| The Reign of Napoleon | 0 | - | 4.54 | 38,828 |
| Countries that Beat Germany | 0 | - | 4.95 | 105,819 |
| Figures from Greek Mythology | 0 | - | 4.91 | 185,858 |
| Countries Italy Declared War On | 0 | - | 4.75 | 43,150 |
| Countries that Beat Italy | 0 | - | 4.85 | 54,125 |
| Countries that Beat Portugal | 0 | - | 4.86 | 58,952 |
| Countries that Beat Spain | 0 | - | 4.94 | 62,661 |
| Commonwealth of Nations Countries | 0 | - | 4.94 | 236,876 |
| English Royal Consorts | 0 | - | 4.37 | 37,273 |
| Countries That Use the Euro | 0 | - | 4.95 | 103,944 |
| Europe Cities Map Quiz | 0 | - | 4.99 | 363,229 |
| 10 Easternmost Countries in Europe | 0 | - | 4.89 | 114,321 |
| The Only European Country ... | 0 | - | 4.91 | 215,151 |
| European Countries NOT in NATO | 0 | - | 4.90 | 60,330 |
| Flags of Europe Quiz | 0 | - | 4.99 | 1,234,700 |
| Countries of Europe - One Minute Sprint | 0 | - | 4.94 | 1,323,514 |
| History of Russia Quiz | 0 | - | 4.49 | 31,844 |
| French History Multiple Choice | 0 | - | 4.55 | 32,947 |
| Countries that Beat Greece | 0 | - | 4.53 | 48,762 |
| History of Italy | 0 | - | 4.55 | 31,900 |
| Geography of the Dutch Empire | 0 | - | 4.61 | 34,567 |
| Countries of the Spanish Empire | 0 | - | 4.52 | 77,093 |
| Counties of England | 0 | - | 4.97 | 792,591 |
| Invasions of Great Britain | 0 | - | 4.51 | 59,716 |
| Oldest Cities in the United Kingdom | 0 | - | 4.39 | 23,667 |
| History of London | 0 | - | 4.33 | 26,134 |
| British History Quiz for Dummies | 0 | - | 4.70 | 78,344 |
| "Big Five" European Soccer Champions Since 2000 | 0 | - | 4.97 | 352,521 |
| 10 Biggest European Countries by Area | 0 | - | 4.99 | 192,158 |
| 10 Westernmost Countries in Europe | 0 | - | 4.96 | 150,706 |
| Top 10 Languages Spoken in Europe | 0 | - | 4.96 | 217,444 |
| European Landmarks Map Quiz | 0 | - | 4.97 | 86,762 |
| Countries of Europe with an Empty Map | 0 | - | 5.00 | 309,335 |
| All First-Level Subdivisions of Europe on a Map | 0 | - | 4.98 | 169,480 |
| Countries with Territory in the Balkans | 0 | - | 4.96 | 88,743 |
| Eastern Europe Map Quiz | 0 | - | 4.91 | 127,529 |
| Slavic Countries | 0 | - | 4.96 | 111,259 |
| Famous Ancient Romans | 0 | - | 4.70 | 85,307 |
| Roman Numeral Decoding Quiz | 0 | - | 4.94 | 435,161 |
| Two Letter Roman Numerals | 0 | - | 4.97 | 55,836 |
| UK Cities Map Quiz | 0 | - | 4.96 | 463,291 |
| The Reign of Henry VIII | 0 | - | 4.25 | 27,676 |
| Elizabeth I... or Elizabeth II? | 0 | - | 4.30 | 24,461 |
| Champions League Winners | 0 | - | 4.92 | 1,000,726 |
| European Geography By Letter - P #1 | 0 | - | 4.81 | 96,619 |
| European Diaspora - Top 11 Countries | 0 | - | 4.90 | 95,415 |
| 10 European Countries with the Most Tourists | 0 | - | 4.98 | 136,928 |
| Three Band Flags of Europe | 0 | - | 4.98 | 192,506 |
| Pixelated Europe Map | 0 | - | 4.88 | 122,240 |
| Monarchies of Europe | 0 | - | 4.90 | 97,703 |
| European Countries with One Border | 0 | - | 4.97 | 182,124 |
| European Countries with the Fewest Borders | 0 | - | 4.97 | 178,988 |
| European Geography By Letter - B #2 | 0 | - | 4.84 | 76,689 |
| Federal Subjects of Russia | 0 | - | 4.94 | 145,318 |
| Countries That Border Russia | 0 | - | 4.98 | 460,349 |
| Countries Formerly in Yugoslavia | 0 | - | 4.95 | 124,537 |
| History of Austria | 0 | - | 4.70 | 17,800 |
| Austria Country Quiz | 0 | - | 4.57 | 59,534 |
| Belgium Country Quiz | 0 | - | 4.70 | 71,492 |
| France Country Quiz | 0 | - | 4.70 | 134,493 |
| Regions of France Map Quiz | 0 | - | 4.97 | 143,786 |
| Geography of the French Empire | 0 | - | 4.45 | 26,999 |
| The French Revolution | 0 | - | 4.46 | 23,862 |
| History of France | 0 | - | 4.59 | 56,632 |
| French History A-Z | 0 | - | 4.22 | 24,397 |
| States of Germany Map Quiz | 0 | - | 4.91 | 132,155 |
| States of Germany | 0 | - | 4.96 | 151,085 |
| Biggest Cities in Germany in 1910 | 0 | - | 4.41 | 23,423 |
| Germany Immigration by Country | 0 | - | 4.85 | 80,511 |
| Regions of Italy | 0 | - | 4.92 | 75,213 |
| Luxembourg Country Quiz | 0 | - | 4.78 | 33,614 |
| Monaco Country Quiz | 0 | - | 4.47 | 41,365 |
| Netherlands Country Quiz | 0 | - | 4.53 | 80,233 |
| Netherlands Immigration by Country | 0 | - | 4.93 | 48,320 |
| Nordic Cities Map Quiz | 0 | - | 4.77 | 90,264 |
| The Vikings! | 0 | - | 4.46 | 28,287 |
| Sweden Immigration by Country | 0 | - | 4.55 | 55,878 |
| Portugal Country Quiz | 0 | - | 4.69 | 71,590 |
| The Portuguese Empire | 0 | - | 4.58 | 12,028 |
| Spain Country Quiz | 0 | - | 4.45 | 128,046 |
| Regions of Spain Quiz | 0 | - | 4.90 | 113,182 |
| Switzerland Country Quiz | 0 | - | 4.51 | 63,132 |
| Cantons of Switzerland | 0 | - | 4.98 | 50,750 |
| Countries and Territories of the United Kingdom | 0 | - | 4.89 | 93,347 |
| United Kingdom A-Z | 0 | - | 4.53 | 87,444 |
| Largest Islands in the British Isles With a Map | 0 | - | 4.52 | 38,628 |
| Wives of King Henry VIII | 0 | - | 4.55 | 53,264 |
| Countries the UK Declared War On | 0 | - | 4.61 | 122,097 |
| Geography of the British Empire | 0 | - | 4.48 | 39,584 |
| Animals in British History | 0 | - | 4.44 | 25,934 |
| 10 Closest Megacities to London | 0 | - | 4.90 | 17,620 |
| Counties of Wales | 0 | - | 4.63 | 39,067 |
| Countries of the Mongol Empire on a Map | 0 | - | 4.99 | 106,316 |
| U.S. Presidents Quiz | 0 | - | 5.00 | 3,674,161 |
| Deadliest U.S. Wars | 0 | - | 4.89 | 189,792 |
| Top 10 Coldest European Countries | 0 | - | 4.94 | 192,642 |
| Top 10 Hottest European Countries | 0 | - | 4.89 | 126,498 |
| Countries That Touch the Adriatic Sea | 0 | - | 4.96 | 70,933 |
| Top 10 European Countries by Coastline | 0 | - | 4.87 | 138,098 |
| 100 Longest Rivers in Europe - with a Map | 0 | - | 4.94 | 65,130 |
| Category Elimination - European Geography #1 | 0 | - | 4.98 | 231,794 |
| European Map without 10 Random Countries | 0 | - | 4.97 | 275,732 |
| Category Elimination - European Geography #2 | 0 | - | 4.99 | 166,087 |
| Category Elimination - European Countries #1 | 0 | - | 4.89 | 89,482 |
| Name a Valid European Country #1 | 0 | - | 4.99 | 258,729 |
| Name a Valid European Country #2 | 0 | - | 4.94 | 113,919 |
| Countries that Border Poland | 0 | - | 4.99 | 171,789 |
| Russia Country Quiz | 0 | - | 4.85 | 114,047 |
| Non-Bordering Countries Closest to Russia | 0 | - | 4.91 | 82,568 |
| Countries With the Most Russian Speakers | 0 | - | 4.97 | 99,553 |
| Croatia Country Quiz | 0 | - | 4.83 | 43,094 |
| Countries that Border Hungary | 0 | - | 4.98 | 103,932 |
| Bosnia and Herzegovina Country Quiz | 0 | - | 4.86 | 35,191 |
| Countries Bordering Serbia | 0 | - | 4.96 | 92,066 |
| Most Popular Baby Girls Names in Germany | 0 | - | 4.51 | 38,721 |
| German Inventions | 0 | - | 3.91 | 30,208 |
| Embarrassing Chapters in German History | 0 | - | 3.41 | 12,597 |
| Roman to Greek God | 0 | - | 4.52 | 122,497 |
| History of Ireland | 0 | - | 4.39 | 31,010 |
| Italian History A-Z | 0 | - | 4.21 | 17,627 |
| The Life of Julius Caesar | 0 | - | 4.39 | 39,018 |
| Roman History by Picture | 0 | - | 4.46 | 26,396 |
| Byzantine History | 0 | - | 4.91 | 28,704 |
| History of The Netherlands | 0 | - | 4.46 | 17,361 |
| Denmark Country Quiz | 0 | - | 4.78 | 75,655 |
| Finland Country Quiz | 0 | - | 4.50 | 59,366 |
| Norway Country Quiz | 0 | - | 4.44 | 76,979 |
| Iceland Country Quiz | 0 | - | 4.69 | 42,993 |
| Biggest Spanish Empire Countries | 0 | - | 4.91 | 115,432 |
| Spanish History A-Z | 0 | - | 4.37 | 19,224 |
| Countries Bordering Spain | 0 | - | 4.51 | 69,236 |
| UK Immigration by Country | 0 | - | 4.94 | 140,360 |
| Arthurian Legend | 0 | - | 4.33 | 25,076 |
| United Kingdom Country Quiz | 0 | - | 4.96 | 138,969 |
