| Name the English Monarchs | 0 | - | 4.91 | 501,001 |
| States of the German Confederation in 1848 | 0 | - | 4.89 | 31,848 |
| The Trojan War | 0 | - | 4.83 | 39,623 |
| Greek Mythology General Knowledge #1 | 0 | - | 4.85 | 111,418 |
| Ancient Roman Trivia #1 | 0 | - | 4.85 | 84,369 |
| Roman Emperors | 0 | - | 4.95 | 119,554 |
| Countries Bordering Germany | 0 | - | 4.99 | 368,418 |
| Germany Country Quiz | 0 | - | 4.82 | 157,439 |
| Countries With the Most German Speakers | 0 | - | 4.89 | 95,856 |
| Countries that Beat Germany | 0 | - | 4.95 | 106,026 |
| Embarrassing Chapters in British History | 0 | - | 4.29 | 32,211 |
| Ancient Greek Trivia | 0 | - | 4.62 | 66,908 |
| Geography of Ancient Greece | 0 | - | 4.69 | 31,865 |
| Medieval English History | 0 | - | 4.53 | 43,438 |
| Countries of Europe in 1815 With a Map | 0 | - | 4.99 | 149,753 |
| Countries of Europe in 1848 | 0 | - | 4.99 | 76,037 |
| Countries of Europe in 1870 with a Map | 0 | - | 4.95 | 64,175 |
| Every Country of Europe Since 1815 With a Map | 0 | - | 4.98 | 70,628 |
| Countries of Europe in 1360 with a Map | 0 | - | 4.99 | 56,522 |
| Countries Bordering France | 0 | - | 4.83 | 401,630 |
| States of Germany Map Quiz | 0 | - | 4.91 | 132,420 |
| States of Germany | 0 | - | 4.96 | 151,633 |
| Germany Immigration by Country | 0 | - | 4.85 | 80,792 |
| Greek Mythology General Knowledge #2 | 0 | - | 4.59 | 73,394 |
| Ancient Greece - Multiple Choice | 0 | - | 4.54 | 41,585 |
| Ancient Roman Trivia #2 | 0 | - | 4.57 | 38,670 |
| Geography of the Roman Empire | 0 | - | 4.56 | 51,833 |
| Roman Names for Places | 0 | - | 4.62 | 58,136 |
| The Reign of Queen Elizabeth I | 0 | - | 4.53 | 31,722 |
| Houses of British Monarchs | 0 | - | 4.53 | 65,541 |
| British History Multiple Choice #1 | 0 | - | 4.46 | 55,080 |
| British History Multiple Choice #2 | 0 | - | 4.42 | 37,917 |
| Europe Map Quiz | 0 | - | 5.00 | 4,751,910 |
| France Cities Map Quiz | 0 | - | 4.96 | 166,292 |
| Departments of France | 0 | - | 4.93 | 53,630 |
| Germany Cities Map Quiz | 0 | - | 4.87 | 125,791 |
| Embarrassing Chapters in German History | 0 | - | 3.41 | 12,610 |
| States of the Holy Roman Empire in 1356 | 0 | - | 4.97 | 73,394 |
| Italy Country Quiz | 0 | - | 4.82 | 122,881 |
| Regions of Italy Map Quiz | 0 | - | 4.96 | 149,000 |
| Italy Cities Map Quiz | 0 | - | 4.97 | 151,705 |
| Countries Surrounding Rome | 0 | - | 4.97 | 49,496 |
| Spain Cities Map Quiz | 0 | - | 4.87 | 96,585 |
| Regions of Spain Map Quiz | 0 | - | 4.95 | 185,255 |
| Modern-Day Countries of the British Empire in 1921 | 0 | - | 4.99 | 117,107 |
| England or Wales? | 0 | - | 4.94 | 45,559 |
| Biggest Countries in Europe in 1700 | 0 | - | 4.73 | 58,359 |
| French Geography Quiz #1 | 0 | - | 4.89 | 34,695 |
| Countries Bordering Austria | 0 | - | 4.97 | 118,130 |
| Countries that Visit France the Most | 0 | - | 4.85 | 45,763 |
| Countries Closest to Metropolitan France | 0 | - | 4.89 | 72,054 |
| Counties of Ireland | 0 | - | 4.92 | 194,397 |
| Countries Bordering Italy | 0 | - | 4.94 | 100,720 |
| Countries Closest to Italy | 0 | - | 4.97 | 197,583 |
| Countries Closest to Spain | 0 | - | 4.96 | 226,490 |
| Counties of the UK and Ireland | 0 | - | 4.98 | 129,895 |
| History of Scotland | 0 | - | 4.51 | 21,064 |
| World Capitals Closest to London | 0 | - | 4.87 | 110,168 |
| 50 Busiest Air Routes from London | 0 | - | 4.87 | 96,630 |
| Europe by Borders in 30 Seconds | 0 | - | 4.98 | 427,154 |
| Andorra Country Quiz | 0 | - | 4.90 | 31,590 |
| Kings of France Quiz | 0 | - | 4.20 | 32,666 |
| The Reign of Napoleon | 0 | - | 4.54 | 38,876 |
| Most Popular Baby Girls Names in Germany | 0 | - | 4.51 | 38,745 |
| Biggest Cities in Germany in 1910 | 0 | - | 4.41 | 23,453 |
| Country Quiz on a Map - Germany | 0 | - | 4.95 | 34,861 |
| German Inventions | 0 | - | 3.91 | 30,215 |
| The Life of Alexander the Great | 0 | - | 4.49 | 18,469 |
| Letters of the Greek Alphabet | 0 | - | 4.97 | 645,615 |
| Name that Greek Letter | 0 | - | 4.93 | 322,921 |
| Countries Italy Declared War On | 0 | - | 4.75 | 43,219 |
| Countries that Beat Italy | 0 | - | 4.85 | 54,257 |
| Seven Hills of Rome | 0 | - | 4.70 | 9,158 |
| Countries that Beat Portugal | 0 | - | 4.86 | 59,074 |
| Countries that Beat Spain | 0 | - | 4.94 | 62,745 |
| Commonwealth of Nations Countries | 0 | - | 4.94 | 237,069 |
| English Royal Consorts | 0 | - | 4.37 | 37,300 |
| Countries That Use the Euro | 0 | - | 4.95 | 104,320 |
| Europe Cities Map Quiz | 0 | - | 4.99 | 363,724 |
| 10 Easternmost Countries in Europe | 0 | - | 4.89 | 114,636 |
| The Only European Country ... | 0 | - | 4.91 | 215,712 |
| European Countries NOT in NATO | 0 | - | 4.90 | 60,601 |
| Olympian Gods Quiz | 0 | - | 4.96 | 499,211 |
| 101 Figures from Greek Mythology | 0 | - | 4.99 | 125,355 |
| Flags of Europe Quiz | 0 | - | 4.99 | 1,238,169 |
| Countries of Europe - One Minute Sprint | 0 | - | 4.94 | 1,325,121 |
| History of Russia Quiz | 0 | - | 4.49 | 31,867 |
| French History Multiple Choice | 0 | - | 4.55 | 32,987 |
| 15 Most Populous Countries that Speak a Germanic Language | 0 | - | 4.39 | 82,473 |
| History of Germany | 0 | - | 4.39 | 52,758 |
| Ancient Greek Words | 0 | - | 4.93 | 111,251 |
| History of Italy | 0 | - | 4.55 | 31,925 |
| Geography of the Dutch Empire | 0 | - | 4.61 | 34,600 |
| Countries of the Spanish Empire | 0 | - | 4.52 | 77,145 |
| Counties of England | 0 | - | 4.97 | 793,965 |
| Invasions of Great Britain | 0 | - | 4.51 | 59,774 |
| Oldest Cities in the United Kingdom | 0 | - | 4.39 | 23,687 |
| History of London | 0 | - | 4.33 | 26,153 |
| British History Quiz for Dummies | 0 | - | 4.70 | 78,420 |
| "Big Five" European Soccer Champions Since 2000 | 0 | - | 4.97 | 353,643 |
| 10 Biggest European Countries by Area | 0 | - | 4.99 | 192,327 |
| 10 Westernmost Countries in Europe | 0 | - | 4.96 | 150,871 |
| Top 10 Languages Spoken in Europe | 0 | - | 4.96 | 217,893 |
| European Landmarks Map Quiz | 0 | - | 4.97 | 86,911 |
| Countries of Europe with an Empty Map | 0 | - | 5.00 | 309,789 |
| All First-Level Subdivisions of Europe on a Map | 0 | - | 4.98 | 170,110 |
| Countries with Territory in the Balkans | 0 | - | 4.96 | 88,893 |
| Eastern Europe Map Quiz | 0 | - | 4.91 | 127,627 |
| Slavic Countries | 0 | - | 4.96 | 111,400 |
| Most Popular Baby Boy Names in Germany | 0 | - | 4.34 | 67,004 |
| Ancient Greece A-Z | 0 | - | 4.60 | 23,107 |
| Ancient Greek Inventions | 0 | - | 4.17 | 16,325 |
| Roman Numeral Decoding Quiz | 0 | - | 4.94 | 435,782 |
| Two Letter Roman Numerals | 0 | - | 4.97 | 55,953 |
| UK Cities Map Quiz | 0 | - | 4.96 | 463,791 |
| The Reign of Henry VIII | 0 | - | 4.25 | 27,702 |
| Elizabeth I... or Elizabeth II? | 0 | - | 4.30 | 24,478 |
| Champions League Winners | 0 | - | 4.92 | 1,002,768 |
| European Diaspora - Top 11 Countries | 0 | - | 4.90 | 95,600 |
| 10 European Countries with the Most Tourists | 0 | - | 4.98 | 137,154 |
| Three Band Flags of Europe | 0 | - | 4.98 | 192,768 |
| Pixelated Europe Map | 0 | - | 4.88 | 122,404 |
| Monarchies of Europe | 0 | - | 4.90 | 97,859 |
| European Countries with One Border | 0 | - | 4.97 | 182,381 |
| European Countries with the Fewest Borders | 0 | - | 4.97 | 179,207 |
| European Geography By Letter - B #2 | 0 | - | 4.85 | 77,539 |
| Federal Subjects of Russia | 0 | - | 4.95 | 145,947 |
| Countries That Border Russia | 0 | - | 4.98 | 460,835 |
| Countries Formerly in Yugoslavia | 0 | - | 4.95 | 124,651 |
| History of Austria | 0 | - | 4.70 | 17,826 |
| Austria Country Quiz | 0 | - | 4.57 | 59,590 |
| Belgium Country Quiz | 0 | - | 4.70 | 71,597 |
| France Country Quiz | 0 | - | 4.70 | 134,652 |
| Regions of France Map Quiz | 0 | - | 4.97 | 144,021 |
| Geography of the French Empire | 0 | - | 4.45 | 27,014 |
| The French Revolution | 0 | - | 4.46 | 23,889 |
| History of France | 0 | - | 4.59 | 56,758 |
| French History A-Z | 0 | - | 4.23 | 24,503 |
| German Cities with the Most Tourists | 0 | - | 4.77 | 48,700 |
| Countries Closest to Germany A-Z | 0 | - | 4.98 | 27,190 |
| Greece Country Quiz | 0 | - | 4.74 | 66,080 |
| Figures from Greek Mythology | 0 | - | 4.91 | 186,243 |
| Regions of Italy | 0 | - | 4.92 | 75,434 |
| Embarrassing Chapters in Italian History | 0 | - | 4.24 | 12,080 |
| Luxembourg Country Quiz | 0 | - | 4.78 | 33,669 |
| Monaco Country Quiz | 0 | - | 4.47 | 41,410 |
| Netherlands Country Quiz | 0 | - | 4.53 | 80,336 |
| Netherlands Immigration by Country | 0 | - | 4.93 | 51,553 |
| Nordic Cities Map Quiz | 0 | - | 4.77 | 90,336 |
| The Vikings! | 0 | - | 4.46 | 28,308 |
| Sweden Immigration by Country | 0 | - | 4.55 | 55,989 |
| Portugal Country Quiz | 0 | - | 4.69 | 71,679 |
| The Portuguese Empire | 0 | - | 4.58 | 12,043 |
| Spain Country Quiz | 0 | - | 4.45 | 128,203 |
| Regions of Spain Quiz | 0 | - | 4.90 | 113,499 |
| Switzerland Country Quiz | 0 | - | 4.51 | 63,215 |
| Cantons of Switzerland | 0 | - | 4.98 | 50,927 |
| Countries and Territories of the United Kingdom | 0 | - | 4.89 | 93,480 |
| United Kingdom A-Z | 0 | - | 4.53 | 87,522 |
| Largest Islands in the British Isles With a Map | 0 | - | 4.52 | 38,664 |
| Wives of King Henry VIII | 0 | - | 4.55 | 53,294 |
| Countries the UK Declared War On | 0 | - | 4.61 | 122,236 |
| Geography of the British Empire | 0 | - | 4.48 | 39,618 |
| Animals in British History | 0 | - | 4.44 | 25,964 |
| 10 Closest Megacities to London | 0 | - | 4.90 | 17,649 |
| Counties of Wales | 0 | - | 4.63 | 39,150 |
| Countries of the Mongol Empire on a Map | 0 | - | 4.99 | 106,520 |
| U.S. Presidents Quiz | 0 | - | 5.00 | 3,684,068 |
| Deadliest U.S. Wars | 0 | - | 4.89 | 190,376 |
| Top 10 Coldest European Countries | 0 | - | 4.94 | 192,780 |
| Top 10 Hottest European Countries | 0 | - | 4.88 | 126,680 |
| Countries That Touch the Adriatic Sea | 0 | - | 4.96 | 71,005 |
| Top 10 European Countries by Coastline | 0 | - | 4.87 | 138,230 |
| 100 Longest Rivers in Europe - with a Map | 0 | - | 4.94 | 65,276 |
| Category Elimination - European Geography #1 | 0 | - | 4.98 | 232,321 |
| European Map without 10 Random Countries | 0 | - | 4.97 | 276,088 |
| Category Elimination - European Geography #2 | 0 | - | 4.99 | 166,475 |
| Category Elimination - European Countries #1 | 0 | - | 4.89 | 89,667 |
| Name a Valid European Country #1 | 0 | - | 4.99 | 259,546 |
| Name a Valid European Country #2 | 0 | - | 4.94 | 114,183 |
| Countries that Border Poland | 0 | - | 4.99 | 171,966 |
| Russia Country Quiz | 0 | - | 4.85 | 114,182 |
| Non-Bordering Countries Closest to Russia | 0 | - | 4.91 | 82,669 |
| Countries With the Most Russian Speakers | 0 | - | 4.97 | 99,986 |
| Croatia Country Quiz | 0 | - | 4.83 | 43,185 |
| Countries that Border Hungary | 0 | - | 4.98 | 104,036 |
| Bosnia and Herzegovina Country Quiz | 0 | - | 4.86 | 35,261 |
| Countries Bordering Serbia | 0 | - | 4.96 | 92,186 |
| Famous Germans by Picture | 0 | - | 4.12 | 16,810 |
| German History A-Z | 0 | - | 4.49 | 24,552 |
| History of Ireland | 0 | - | 4.39 | 31,074 |
| Italian History A-Z | 0 | - | 4.21 | 17,649 |
| Byzantine History | 0 | - | 4.91 | 28,741 |
| History of The Netherlands | 0 | - | 4.46 | 17,394 |
| Denmark Country Quiz | 0 | - | 4.78 | 75,741 |
| Finland Country Quiz | 0 | - | 4.50 | 59,461 |
| Norway Country Quiz | 0 | - | 4.44 | 77,112 |
| Iceland Country Quiz | 0 | - | 4.69 | 43,045 |
| Biggest Spanish Empire Countries | 0 | - | 4.91 | 115,633 |
| Spanish History A-Z | 0 | - | 4.37 | 19,248 |
