| Name the English Monarchs | 0 | - | 4.91 | 506,117 |
| States of the German Confederation in 1848 | 0 | - | 4.90 | 32,413 |
| The Trojan War | 0 | - | 4.83 | 39,966 |
| Greek Mythology General Knowledge #1 | 0 | - | 4.85 | 112,874 |
| Ancient Roman Trivia #1 | 0 | - | 4.85 | 85,561 |
| Roman Emperors | 0 | - | 4.95 | 121,103 |
| Countries Bordering Germany | 0 | - | 4.99 | 371,688 |
| Germany Country Quiz | 0 | - | 4.82 | 158,770 |
| England or Wales? | 0 | - | 4.94 | 45,945 |
| Countries With the Most German Speakers | 0 | - | 4.89 | 98,484 |
| Modern Day Countries of the Dutch Empire on a Map | 0 | - | 4.87 | 61,620 |
| Countries of Iberia in History with a Map | 0 | - | 4.88 | 42,344 |
| Modern Day Countries of the Spanish Empire on a Map | 0 | - | 4.95 | 86,833 |
| British History Multiple Choice #1 | 0 | - | 4.46 | 55,299 |
| British History Multiple Choice #2 | 0 | - | 4.42 | 38,079 |
| Countries that Beat Germany | 0 | - | 4.94 | 107,259 |
| Ancient Greek Trivia | 0 | - | 4.62 | 67,214 |
| Geography of Ancient Greece | 0 | - | 4.69 | 32,034 |
| Medieval English History | 0 | - | 4.53 | 43,643 |
| Countries of Europe in 1815 With a Map | 0 | - | 4.99 | 151,286 |
| Countries of Europe in 1848 | 0 | - | 4.98 | 85,200 |
| Countries of Europe in 1870 with a Map | 0 | - | 4.95 | 65,681 |
| Every Country of Europe Since 1815 With a Map | 0 | - | 4.98 | 71,776 |
| Countries of Europe in 1360 with a Map | 0 | - | 4.99 | 57,513 |
| Countries Bordering France | 0 | - | 4.83 | 404,741 |
| French History Multiple Choice | 0 | - | 4.55 | 33,217 |
| States of Germany Map Quiz | 0 | - | 4.92 | 133,747 |
| States of Germany | 0 | - | 4.95 | 154,342 |
| Germany Immigration by Country | 0 | - | 4.86 | 81,654 |
| Greek Mythology General Knowledge #2 | 0 | - | 4.59 | 74,259 |
| Ancient Greece - Multiple Choice | 0 | - | 4.54 | 41,827 |
| Ancient Roman Trivia #2 | 0 | - | 4.61 | 44,255 |
| Geography of the Roman Empire | 0 | - | 4.55 | 52,195 |
| Roman Names for Places | 0 | - | 4.62 | 58,677 |
| The Reign of Queen Elizabeth I | 0 | - | 4.53 | 31,945 |
| Houses of British Monarchs | 0 | - | 4.53 | 65,927 |
| Europe Map Quiz | 0 | - | 5.00 | 4,785,911 |
| Andorra Country Quiz | 0 | - | 4.91 | 31,915 |
| France Cities Map Quiz | 0 | - | 4.96 | 167,732 |
| Departments of France | 0 | - | 4.93 | 55,067 |
| Germany Cities Map Quiz | 0 | - | 4.87 | 127,028 |
| States of the Holy Roman Empire in 1356 | 0 | - | 4.97 | 75,243 |
| Regions of Italy Map Quiz | 0 | - | 4.96 | 150,156 |
| Italy Cities Map Quiz | 0 | - | 4.97 | 152,985 |
| Countries Surrounding Rome | 0 | - | 4.97 | 49,727 |
| Spain Cities Map Quiz | 0 | - | 4.87 | 97,422 |
| Regions of Spain Map Quiz | 0 | - | 4.95 | 186,796 |
| Modern-Day Countries of the British Empire in 1921 | 0 | - | 4.99 | 118,670 |
| Biggest Countries in Europe in 1700 | 0 | - | 4.73 | 58,735 |
| French Geography Quiz #1 | 0 | - | 4.89 | 35,065 |
| Countries Bordering Austria | 0 | - | 4.97 | 118,914 |
| Countries that Visit France the Most | 0 | - | 4.85 | 46,131 |
| Countries Closest to Metropolitan France | 0 | - | 4.89 | 72,447 |
| Counties of Ireland | 0 | - | 4.92 | 197,195 |
| Countries Bordering Italy | 0 | - | 4.94 | 101,226 |
| Countries Closest to Italy | 0 | - | 4.97 | 199,305 |
| Countries Closest to Spain | 0 | - | 4.96 | 228,035 |
| Counties of the UK and Ireland | 0 | - | 4.98 | 132,273 |
| Embarrassing Chapters in British History | 0 | - | 4.30 | 32,361 |
| History of Scotland | 0 | - | 4.51 | 21,170 |
| World Capitals Closest to London | 0 | - | 4.88 | 111,033 |
| 50 Busiest Air Routes from London | 0 | - | 4.87 | 97,265 |
| Europe by Borders in 30 Seconds | 0 | - | 4.98 | 430,672 |
| Kings of France Quiz | 0 | - | 4.20 | 32,909 |
| The Reign of Napoleon | 0 | - | 4.54 | 39,125 |
| Most Popular Baby Girls Names in Germany | 0 | - | 4.51 | 38,980 |
| Biggest Cities in Germany in 1910 | 0 | - | 4.41 | 23,556 |
| Country Quiz on a Map - Germany | 0 | - | 4.95 | 35,525 |
| German Inventions | 0 | - | 3.91 | 30,280 |
| Embarrassing Chapters in German History | 0 | - | 3.40 | 12,683 |
| The Life of Alexander the Great | 0 | - | 4.51 | 18,570 |
| Letters of the Greek Alphabet | 0 | - | 4.97 | 651,559 |
| Name that Greek Letter | 0 | - | 4.93 | 324,891 |
| Countries Italy Declared War On | 0 | - | 4.75 | 43,619 |
| Countries that Beat Italy | 0 | - | 4.85 | 55,135 |
| Seven Hills of Rome | 0 | - | 4.70 | 9,256 |
| Countries that Beat Portugal | 0 | - | 4.86 | 59,841 |
| Countries that Beat Spain | 0 | - | 4.94 | 63,318 |
| Commonwealth of Nations Countries | 0 | - | 4.95 | 238,219 |
| English Royal Consorts | 0 | - | 4.38 | 37,510 |
| Countries That Use the Euro | 0 | - | 4.95 | 106,637 |
| Europe Cities Map Quiz | 0 | - | 4.99 | 366,096 |
| 10 Easternmost Countries in Europe | 0 | - | 4.87 | 116,998 |
| The Only European Country ... | 0 | - | 4.91 | 218,807 |
| European Countries NOT in NATO | 0 | - | 4.91 | 62,413 |
| Olympian Gods Quiz | 0 | - | 4.96 | 503,548 |
| 101 Figures from Greek Mythology | 0 | - | 4.99 | 127,433 |
| Flags of Europe Quiz | 0 | - | 4.99 | 1,256,804 |
| Countries of Europe - One Minute Sprint | 0 | - | 4.94 | 1,335,102 |
| History of Russia Quiz | 0 | - | 4.47 | 31,999 |
| 15 Most Populous Countries that Speak a Germanic Language | 0 | - | 4.40 | 82,771 |
| History of Germany | 0 | - | 4.39 | 52,966 |
| Ancient Greek Words | 0 | - | 4.93 | 112,401 |
| History of Italy | 0 | - | 4.55 | 32,138 |
| Geography of the Dutch Empire | 0 | - | 4.62 | 34,810 |
| Countries of the Spanish Empire | 0 | - | 4.52 | 77,413 |
| Counties of England | 0 | - | 4.97 | 802,385 |
| Invasions of Great Britain | 0 | - | 4.51 | 60,081 |
| Oldest Cities in the United Kingdom | 0 | - | 4.39 | 23,821 |
| History of London | 0 | - | 4.33 | 26,268 |
| British History Quiz for Dummies | 0 | - | 4.70 | 79,019 |
| "Big Five" European Soccer Champions Since 2000 | 0 | - | 4.97 | 361,244 |
| 10 Biggest European Countries by Area | 0 | - | 4.99 | 193,437 |
| 10 Westernmost Countries in Europe | 0 | - | 4.96 | 151,983 |
| Top 10 Languages Spoken in Europe | 0 | - | 4.96 | 220,604 |
| European Landmarks Map Quiz | 0 | - | 4.97 | 87,723 |
| Countries of Europe with an Empty Map | 0 | - | 5.00 | 312,561 |
| All First-Level Subdivisions of Europe on a Map | 0 | - | 4.99 | 175,512 |
| Countries with Territory in the Balkans | 0 | - | 4.96 | 90,117 |
| Eastern Europe Map Quiz | 0 | - | 4.91 | 128,727 |
| Slavic Countries | 0 | - | 4.96 | 112,316 |
| Most Popular Baby Boy Names in Germany | 0 | - | 4.34 | 67,243 |
| Ancient Greece A-Z | 0 | - | 4.60 | 23,232 |
| Ancient Greek Inventions | 0 | - | 4.18 | 16,410 |
| Roman Numeral Decoding Quiz | 0 | - | 4.94 | 439,591 |
| Two Letter Roman Numerals | 0 | - | 4.97 | 56,487 |
| UK Cities Map Quiz | 0 | - | 4.96 | 466,312 |
| The Reign of Henry VIII | 0 | - | 4.25 | 27,860 |
| Elizabeth I... or Elizabeth II? | 0 | - | 4.30 | 24,562 |
| Champions League Winners | 0 | - | 4.92 | 1,015,381 |
| Australia... or New Zealand? | 0 | - | 4.83 | 61,975 |
| European Geography By Letter - P #1 | 0 | - | 4.81 | 98,678 |
| European Diaspora - Top 11 Countries | 0 | - | 4.88 | 96,440 |
| 10 European Countries with the Most Tourists | 0 | - | 4.98 | 138,418 |
| Three Band Flags of Europe | 0 | - | 4.98 | 194,488 |
| Pixelated Europe Map | 0 | - | 4.88 | 123,419 |
| Monarchies of Europe | 0 | - | 4.90 | 98,801 |
| European Countries with One Border | 0 | - | 4.97 | 183,706 |
| European Countries with the Fewest Borders | 0 | - | 4.97 | 180,464 |
| European Geography By Letter - B #2 | 0 | - | 4.87 | 88,493 |
| Federal Subjects of Russia | 0 | - | 4.95 | 149,345 |
| Countries That Border Russia | 0 | - | 4.98 | 464,351 |
| Countries Formerly in Yugoslavia | 0 | - | 4.95 | 125,432 |
| History of Austria | 0 | - | 4.70 | 17,969 |
| Austria Country Quiz | 0 | - | 4.57 | 60,032 |
| Belgium Country Quiz | 0 | - | 4.72 | 72,219 |
| France Country Quiz | 0 | - | 4.70 | 135,601 |
| Regions of France Map Quiz | 0 | - | 4.97 | 145,561 |
| Geography of the French Empire | 0 | - | 4.45 | 27,210 |
| The French Revolution | 0 | - | 4.47 | 24,139 |
| History of France | 0 | - | 4.61 | 57,570 |
| French History A-Z | 0 | - | 4.27 | 25,103 |
| German Cities with the Most Tourists | 0 | - | 4.77 | 49,086 |
| Countries Closest to Germany A-Z | 0 | - | 4.98 | 27,578 |
| Greece Country Quiz | 0 | - | 4.74 | 66,615 |
| Most-Mentioned Characters in the Iliad | 0 | - | 4.81 | 20,953 |
| Figures from Greek Mythology | 0 | - | 4.91 | 188,712 |
| Regions of Italy | 0 | - | 4.92 | 76,970 |
| Italy Country Quiz | 0 | - | 4.77 | 123,987 |
| Luxembourg Country Quiz | 0 | - | 4.78 | 33,935 |
| Monaco Country Quiz | 0 | - | 4.48 | 41,676 |
| Netherlands Country Quiz | 0 | - | 4.52 | 80,913 |
| Netherlands Immigration by Country | 0 | - | 4.93 | 52,765 |
| Nordic Cities Map Quiz | 0 | - | 4.77 | 90,707 |
| The Vikings! | 0 | - | 4.46 | 28,400 |
| Sweden Immigration by Country | 0 | - | 4.53 | 56,364 |
| Portugal Country Quiz | 0 | - | 4.69 | 72,286 |
| The Portuguese Empire | 0 | - | 4.58 | 12,101 |
| Spain Country Quiz | 0 | - | 4.44 | 129,196 |
| Regions of Spain Quiz | 0 | - | 4.90 | 115,239 |
| Switzerland Country Quiz | 0 | - | 4.52 | 63,626 |
| Cantons of Switzerland | 0 | - | 4.98 | 51,715 |
| Countries and Territories of the United Kingdom | 0 | - | 4.90 | 94,482 |
| United Kingdom A-Z | 0 | - | 4.51 | 88,341 |
| Largest Islands in the British Isles With a Map | 0 | - | 4.52 | 38,845 |
| Which Country of the United Kingdom? | 0 | - | 4.58 | 39,566 |
| British Geography Multiple Choice | 0 | - | 4.49 | 43,440 |
| Wives of King Henry VIII | 0 | - | 4.55 | 53,453 |
| Countries the UK Declared War On | 0 | - | 4.55 | 123,209 |
| Geography of the British Empire | 0 | - | 4.48 | 39,840 |
| Animals in British History | 0 | - | 4.43 | 26,085 |
| 10 Closest Megacities to London | 0 | - | 4.90 | 17,834 |
| Counties of Wales | 0 | - | 4.63 | 39,577 |
| U.S. Presidents Quiz | 0 | - | 5.00 | 3,723,871 |
| Deadliest U.S. Wars | 0 | - | 4.89 | 191,715 |
| Top 10 Coldest European Countries | 0 | - | 4.94 | 193,810 |
| Top 10 Hottest European Countries | 0 | - | 4.88 | 127,733 |
| Countries That Touch the Adriatic Sea | 0 | - | 4.96 | 71,328 |
| Top 10 European Countries by Coastline | 0 | - | 4.88 | 138,697 |
| 100 Longest Rivers in Europe - with a Map | 0 | - | 4.94 | 65,899 |
| Category Elimination - European Geography #1 | 0 | - | 4.98 | 235,649 |
| European Map without 10 Random Countries | 0 | - | 4.97 | 278,789 |
| Category Elimination - European Geography #2 | 0 | - | 4.99 | 168,776 |
| Category Elimination - European Countries #1 | 0 | - | 4.90 | 91,002 |
| Name a Valid European Country #1 | 0 | - | 4.99 | 264,383 |
| Name a Valid European Country #2 | 0 | - | 4.94 | 115,810 |
| Countries that Border Poland | 0 | - | 4.99 | 173,108 |
| Russia Country Quiz | 0 | - | 4.83 | 115,273 |
| Non-Bordering Countries Closest to Russia | 0 | - | 4.91 | 83,231 |
| Countries With the Most Russian Speakers | 0 | - | 4.97 | 102,674 |
| Croatia Country Quiz | 0 | - | 4.83 | 43,712 |
| Countries that Border Hungary | 0 | - | 4.98 | 104,978 |
| Bosnia and Herzegovina Country Quiz | 0 | - | 4.86 | 35,561 |
| Countries Bordering Serbia | 0 | - | 4.96 | 93,029 |
| Austria... or Australia? | 0 | - | 4.68 | 104,745 |
| Famous Germans by Picture | 0 | - | 4.12 | 16,898 |
| German History A-Z | 0 | - | 4.49 | 24,897 |
| History of Ireland | 0 | - | 4.39 | 31,419 |
| Italian History A-Z | 0 | - | 4.16 | 17,915 |
| Byzantine History | 0 | - | 4.91 | 29,013 |
