| Name the English Monarchs | 0 | - | 4.91 | 507,298 |
| States of the German Confederation in 1848 | 0 | - | 4.90 | 32,509 |
| The Trojan War | 0 | - | 4.83 | 40,049 |
| Greek Mythology General Knowledge #1 | 0 | - | 4.85 | 113,163 |
| Ancient Roman Trivia #1 | 0 | - | 4.85 | 85,683 |
| Roman Emperors | 0 | - | 4.95 | 121,411 |
| Countries Bordering Germany | 0 | - | 4.99 | 372,213 |
| Germany Country Quiz | 0 | - | 4.82 | 159,037 |
| England or Wales? | 0 | - | 4.94 | 46,018 |
| Countries With the Most German Speakers | 0 | - | 4.89 | 99,081 |
| Modern Day Countries of the Dutch Empire on a Map | 0 | - | 4.87 | 61,789 |
| Countries of Iberia in History with a Map | 0 | - | 4.88 | 42,498 |
| Modern Day Countries of the Spanish Empire on a Map | 0 | - | 4.95 | 87,002 |
| British History Multiple Choice #1 | 0 | - | 4.46 | 55,352 |
| British History Multiple Choice #2 | 0 | - | 4.42 | 38,103 |
| Countries that Beat Germany | 0 | - | 4.94 | 107,479 |
| Ancient Greek Trivia | 0 | - | 4.62 | 67,277 |
| Geography of Ancient Greece | 0 | - | 4.69 | 32,069 |
| Medieval English History | 0 | - | 4.53 | 43,688 |
| Countries of Europe in 1815 With a Map | 0 | - | 4.99 | 151,540 |
| Countries of Europe in 1848 | 0 | - | 4.98 | 85,991 |
| Countries of Europe in 1870 with a Map | 0 | - | 4.95 | 65,983 |
| Every Country of Europe Since 1815 With a Map | 0 | - | 4.97 | 72,002 |
| Countries of Europe in 1360 with a Map | 0 | - | 4.99 | 57,716 |
| Countries Bordering France | 0 | - | 4.83 | 405,319 |
| French History Multiple Choice | 0 | - | 4.55 | 33,276 |
| States of Germany Map Quiz | 0 | - | 4.92 | 133,968 |
| States of Germany | 0 | - | 4.95 | 154,908 |
| Germany Immigration by Country | 0 | - | 4.86 | 81,797 |
| Greek Mythology General Knowledge #2 | 0 | - | 4.59 | 74,439 |
| Ancient Greece - Multiple Choice | 0 | - | 4.54 | 41,889 |
| Ancient Roman Trivia #2 | 0 | - | 4.61 | 44,376 |
| Geography of the Roman Empire | 0 | - | 4.55 | 52,260 |
| Roman Names for Places | 0 | - | 4.62 | 58,780 |
| The Reign of Queen Elizabeth I | 0 | - | 4.53 | 32,001 |
| Houses of British Monarchs | 0 | - | 4.54 | 66,017 |
| Europe Map Quiz | 0 | - | 5.00 | 4,792,874 |
| Andorra Country Quiz | 0 | - | 4.91 | 31,985 |
| France Cities Map Quiz | 0 | - | 4.96 | 167,983 |
| Departments of France | 0 | - | 4.93 | 55,382 |
| Germany Cities Map Quiz | 0 | - | 4.87 | 127,221 |
| States of the Holy Roman Empire in 1356 | 0 | - | 4.97 | 75,578 |
| Regions of Italy Map Quiz | 0 | - | 4.96 | 150,407 |
| Italy Cities Map Quiz | 0 | - | 4.97 | 153,207 |
| Countries Surrounding Rome | 0 | - | 4.97 | 49,776 |
| Spain Cities Map Quiz | 0 | - | 4.87 | 97,606 |
| Regions of Spain Map Quiz | 0 | - | 4.95 | 187,018 |
| Modern-Day Countries of the British Empire in 1921 | 0 | - | 4.99 | 119,020 |
| Biggest Countries in Europe in 1700 | 0 | - | 4.73 | 58,814 |
| French Geography Quiz #1 | 0 | - | 4.89 | 35,235 |
| Countries Bordering Austria | 0 | - | 4.97 | 119,032 |
| Countries that Visit France the Most | 0 | - | 4.85 | 46,209 |
| Countries Closest to Metropolitan France | 0 | - | 4.89 | 72,557 |
| Counties of Ireland | 0 | - | 4.92 | 197,646 |
| Countries Bordering Italy | 0 | - | 4.94 | 101,355 |
| Countries Closest to Italy | 0 | - | 4.97 | 199,626 |
| Countries Closest to Spain | 0 | - | 4.96 | 228,357 |
| Counties of the UK and Ireland | 0 | - | 4.98 | 132,615 |
| Embarrassing Chapters in British History | 0 | - | 4.30 | 32,405 |
| History of Scotland | 0 | - | 4.51 | 21,190 |
| World Capitals Closest to London | 0 | - | 4.88 | 111,187 |
| 50 Busiest Air Routes from London | 0 | - | 4.87 | 97,401 |
| Europe by Borders in 30 Seconds | 0 | - | 4.98 | 431,369 |
| Kings of France Quiz | 0 | - | 4.22 | 32,966 |
| The Reign of Napoleon | 0 | - | 4.54 | 39,212 |
| Most Popular Baby Girls Names in Germany | 0 | - | 4.51 | 39,023 |
| Biggest Cities in Germany in 1910 | 0 | - | 4.41 | 23,573 |
| Country Quiz on a Map - Germany | 0 | - | 4.95 | 35,646 |
| German Inventions | 0 | - | 3.91 | 30,290 |
| Embarrassing Chapters in German History | 0 | - | 3.40 | 12,692 |
| The Life of Alexander the Great | 0 | - | 4.51 | 18,594 |
| Letters of the Greek Alphabet | 0 | - | 4.97 | 652,834 |
| Name that Greek Letter | 0 | - | 4.93 | 325,243 |
| Countries Italy Declared War On | 0 | - | 4.74 | 48,065 |
| Countries that Beat Italy | 0 | - | 4.85 | 55,272 |
| Seven Hills of Rome | 0 | - | 4.70 | 9,277 |
| Countries that Beat Portugal | 0 | - | 4.86 | 59,985 |
| Countries that Beat Spain | 0 | - | 4.94 | 63,431 |
| Commonwealth of Nations Countries | 0 | - | 4.95 | 238,587 |
| English Royal Consorts | 0 | - | 4.38 | 37,556 |
| Countries That Use the Euro | 0 | - | 4.95 | 107,192 |
| Europe Cities Map Quiz | 0 | - | 4.99 | 366,564 |
| 10 Easternmost Countries in Europe | 0 | - | 4.87 | 117,466 |
| The Only European Country ... | 0 | - | 4.91 | 219,539 |
| European Countries NOT in NATO | 0 | - | 4.91 | 62,804 |
| Olympian Gods Quiz | 0 | - | 4.96 | 504,363 |
| 101 Figures from Greek Mythology | 0 | - | 4.99 | 127,854 |
| Flags of Europe Quiz | 0 | - | 4.99 | 1,261,161 |
| Countries of Europe - One Minute Sprint | 0 | - | 4.94 | 1,337,060 |
| History of Russia Quiz | 0 | - | 4.47 | 32,024 |
| 15 Most Populous Countries that Speak a Germanic Language | 0 | - | 4.40 | 82,824 |
| History of Germany | 0 | - | 4.39 | 52,998 |
| Ancient Greek Words | 0 | - | 4.93 | 112,639 |
| History of Italy | 0 | - | 4.55 | 32,182 |
| Geography of the Dutch Empire | 0 | - | 4.62 | 34,845 |
| Countries of the Spanish Empire | 0 | - | 4.52 | 77,465 |
| Counties of England | 0 | - | 4.97 | 804,127 |
| Invasions of Great Britain | 0 | - | 4.51 | 60,142 |
| Oldest Cities in the United Kingdom | 0 | - | 4.39 | 23,840 |
| History of London | 0 | - | 4.33 | 26,282 |
| British History Quiz for Dummies | 0 | - | 4.70 | 79,150 |
| "Big Five" European Soccer Champions Since 2000 | 0 | - | 4.97 | 362,555 |
| 10 Biggest European Countries by Area | 0 | - | 4.99 | 193,763 |
| 10 Westernmost Countries in Europe | 0 | - | 4.96 | 152,522 |
| Top 10 Languages Spoken in Europe | 0 | - | 4.96 | 221,226 |
| European Landmarks Map Quiz | 0 | - | 4.97 | 87,900 |
| Countries of Europe with an Empty Map | 0 | - | 5.00 | 313,162 |
| All First-Level Subdivisions of Europe on a Map | 0 | - | 4.99 | 176,464 |
| Countries with Territory in the Balkans | 0 | - | 4.96 | 90,353 |
| Eastern Europe Map Quiz | 0 | - | 4.91 | 128,908 |
| Slavic Countries | 0 | - | 4.96 | 112,497 |
| Most Popular Baby Boy Names in Germany | 0 | - | 4.34 | 67,297 |
| Ancient Greece A-Z | 0 | - | 4.60 | 23,258 |
| Ancient Greek Inventions | 0 | - | 4.18 | 16,424 |
| Roman Numeral Decoding Quiz | 0 | - | 4.94 | 440,355 |
| Two Letter Roman Numerals | 0 | - | 4.97 | 56,609 |
| UK Cities Map Quiz | 0 | - | 4.96 | 466,813 |
| The Reign of Henry VIII | 0 | - | 4.25 | 27,892 |
| Elizabeth I... or Elizabeth II? | 0 | - | 4.30 | 24,575 |
| Champions League Winners | 0 | - | 4.92 | 1,017,812 |
| Australia... or New Zealand? | 0 | - | 4.83 | 62,107 |
| European Geography By Letter - P #1 | 0 | - | 4.81 | 99,085 |
| European Diaspora - Top 11 Countries | 0 | - | 4.88 | 96,976 |
| 10 European Countries with the Most Tourists | 0 | - | 4.98 | 138,712 |
| Three Band Flags of Europe | 0 | - | 4.98 | 194,836 |
| Pixelated Europe Map | 0 | - | 4.88 | 123,603 |
| Monarchies of Europe | 0 | - | 4.90 | 99,022 |
| European Countries with One Border | 0 | - | 4.97 | 184,009 |
| European Countries with the Fewest Borders | 0 | - | 4.97 | 180,717 |
| European Geography By Letter - B #2 | 0 | - | 4.87 | 89,062 |
| Federal Subjects of Russia | 0 | - | 4.95 | 149,904 |
| Countries That Border Russia | 0 | - | 4.98 | 464,884 |
| Countries Formerly in Yugoslavia | 0 | - | 4.95 | 125,572 |
| History of Austria | 0 | - | 4.70 | 17,992 |
| Austria Country Quiz | 0 | - | 4.57 | 60,113 |
| Belgium Country Quiz | 0 | - | 4.72 | 72,363 |
| France Country Quiz | 0 | - | 4.70 | 135,789 |
| Regions of France Map Quiz | 0 | - | 4.97 | 145,801 |
| Geography of the French Empire | 0 | - | 4.45 | 27,230 |
| The French Revolution | 0 | - | 4.47 | 24,165 |
| History of France | 0 | - | 4.61 | 57,718 |
| French History A-Z | 0 | - | 4.27 | 25,190 |
| German Cities with the Most Tourists | 0 | - | 4.77 | 49,169 |
| Countries Closest to Germany A-Z | 0 | - | 4.98 | 27,658 |
| Greece Country Quiz | 0 | - | 4.74 | 66,701 |
| Most-Mentioned Characters in the Iliad | 0 | - | 4.81 | 21,016 |
| Figures from Greek Mythology | 0 | - | 4.91 | 190,089 |
| Regions of Italy | 0 | - | 4.92 | 77,248 |
| Italy Country Quiz | 0 | - | 4.77 | 124,199 |
| Luxembourg Country Quiz | 0 | - | 4.78 | 33,979 |
| Monaco Country Quiz | 0 | - | 4.48 | 41,722 |
| Netherlands Country Quiz | 0 | - | 4.52 | 81,032 |
| Netherlands Immigration by Country | 0 | - | 4.93 | 52,906 |
| Nordic Cities Map Quiz | 0 | - | 4.77 | 90,795 |
| The Vikings! | 0 | - | 4.46 | 28,419 |
| Sweden Immigration by Country | 0 | - | 4.53 | 56,439 |
| Portugal Country Quiz | 0 | - | 4.69 | 72,406 |
| The Portuguese Empire | 0 | - | 4.58 | 12,117 |
| Spain Country Quiz | 0 | - | 4.44 | 129,375 |
| Regions of Spain Quiz | 0 | - | 4.90 | 115,564 |
| Switzerland Country Quiz | 0 | - | 4.52 | 63,712 |
| Cantons of Switzerland | 0 | - | 4.98 | 51,893 |
| Countries and Territories of the United Kingdom | 0 | - | 4.90 | 94,618 |
| United Kingdom A-Z | 0 | - | 4.51 | 88,436 |
| Largest Islands in the British Isles With a Map | 0 | - | 4.52 | 38,881 |
| Which Country of the United Kingdom? | 0 | - | 4.58 | 39,637 |
| British Geography Multiple Choice | 0 | - | 4.49 | 43,488 |
| Wives of King Henry VIII | 0 | - | 4.55 | 53,488 |
| Countries the UK Declared War On | 0 | - | 4.55 | 123,363 |
| Geography of the British Empire | 0 | - | 4.48 | 39,870 |
| Animals in British History | 0 | - | 4.43 | 26,116 |
| 10 Closest Megacities to London | 0 | - | 4.90 | 17,861 |
| Counties of Wales | 0 | - | 4.63 | 39,675 |
| U.S. Presidents Quiz | 0 | - | 5.00 | 3,730,665 |
| Deadliest U.S. Wars | 0 | - | 4.89 | 191,961 |
| Top 10 Coldest European Countries | 0 | - | 4.94 | 194,051 |
| Top 10 Hottest European Countries | 0 | - | 4.88 | 127,936 |
| Countries That Touch the Adriatic Sea | 0 | - | 4.96 | 71,395 |
| Top 10 European Countries by Coastline | 0 | - | 4.86 | 138,818 |
| 100 Longest Rivers in Europe - with a Map | 0 | - | 4.94 | 66,043 |
| Category Elimination - European Geography #1 | 0 | - | 4.98 | 236,291 |
| European Map without 10 Random Countries | 0 | - | 4.97 | 279,284 |
| Category Elimination - European Geography #2 | 0 | - | 4.99 | 169,222 |
| Category Elimination - European Countries #1 | 0 | - | 4.90 | 91,252 |
| Name a Valid European Country #1 | 0 | - | 4.99 | 265,321 |
| Name a Valid European Country #2 | 0 | - | 4.94 | 116,108 |
| Countries that Border Poland | 0 | - | 4.99 | 173,331 |
| Russia Country Quiz | 0 | - | 4.83 | 115,435 |
| Non-Bordering Countries Closest to Russia | 0 | - | 4.91 | 83,346 |
| Countries With the Most Russian Speakers | 0 | - | 4.97 | 103,234 |
| Croatia Country Quiz | 0 | - | 4.83 | 43,824 |
| Countries that Border Hungary | 0 | - | 4.98 | 105,095 |
| Bosnia and Herzegovina Country Quiz | 0 | - | 4.83 | 35,631 |
| Countries Bordering Serbia | 0 | - | 4.96 | 93,200 |
| Austria... or Australia? | 0 | - | 4.67 | 104,832 |
| Famous Germans by Picture | 0 | - | 4.12 | 16,917 |
| German History A-Z | 0 | - | 4.49 | 24,942 |
| History of Ireland | 0 | - | 4.39 | 31,481 |
| Italian History A-Z | 0 | - | 4.16 | 17,954 |
| Byzantine History | 0 | - | 4.91 | 29,045 |
