| Modern Day Countries of the Dutch Empire on a Map | 0 | - | 4.86 | 61,325 |
| Countries of Iberia in History with a Map | 0 | - | 4.88 | 42,083 |
| Modern Day Countries of the Spanish Empire on a Map | 0 | - | 4.95 | 86,540 |
| Counties of England | 0 | - | 4.97 | 799,240 |
| States of the German Confederation in 1848 | 0 | - | 4.90 | 32,218 |
| Countries of Europe in 1815 With a Map | 0 | - | 4.99 | 150,792 |
| Countries of Europe in 1848 | 0 | - | 4.98 | 83,624 |
| Countries of Europe in 1870 with a Map | 0 | - | 4.95 | 65,144 |
| Every Country of Europe Since 1815 With a Map | 0 | - | 4.98 | 71,362 |
| Countries of Europe in 1360 with a Map | 0 | - | 4.99 | 57,173 |
| Regions of France Map Quiz | 0 | - | 4.97 | 144,896 |
| States of Germany Map Quiz | 0 | - | 4.92 | 133,257 |
| States of Germany | 0 | - | 4.95 | 153,319 |
| Germany Immigration by Country | 0 | - | 4.85 | 81,310 |
| Regions of Italy | 0 | - | 4.92 | 76,307 |
| Netherlands Immigration by Country | 0 | - | 4.93 | 52,463 |
| Regions of Spain Quiz | 0 | - | 4.90 | 114,477 |
| Cantons of Switzerland | 0 | - | 4.98 | 51,436 |
| Countries and Territories of the United Kingdom | 0 | - | 4.90 | 94,188 |
| Europe Map Quiz | 0 | - | 5.00 | 4,772,618 |
| Biggest Countries in Europe in 1700 | 0 | - | 4.73 | 58,594 |
| Andorra Country Quiz | 0 | - | 4.91 | 31,792 |
| France Cities Map Quiz | 0 | - | 4.96 | 167,211 |
| Departments of France | 0 | - | 4.93 | 54,521 |
| Germany Country Quiz | 0 | - | 4.83 | 158,230 |
| Germany Cities Map Quiz | 0 | - | 4.87 | 126,669 |
| Regions of Italy Map Quiz | 0 | - | 4.96 | 149,714 |
| Italy Cities Map Quiz | 0 | - | 4.97 | 152,646 |
| Countries Surrounding Rome | 0 | - | 4.97 | 49,621 |
| Spain Cities Map Quiz | 0 | - | 4.87 | 97,136 |
| Regions of Spain Map Quiz | 0 | - | 4.95 | 186,273 |
| Modern-Day Countries of the British Empire in 1921 | 0 | - | 4.99 | 118,048 |
| England or Wales? | 0 | - | 4.94 | 45,814 |
| Europe by Borders in 30 Seconds | 0 | - | 4.98 | 429,227 |
| Nordic Cities Map Quiz | 0 | - | 4.77 | 90,565 |
| Name the English Monarchs | 0 | - | 4.91 | 504,165 |
| Wives of King Henry VIII | 0 | - | 4.55 | 53,410 |
| Countries the UK Declared War On | 0 | - | 4.55 | 122,742 |
| Geography of the British Empire | 0 | - | 4.48 | 39,744 |
| French Inventions | 0 | - | 4.10 | 13,910 |
| Letters of the Greek Alphabet | 0 | - | 4.97 | 649,134 |
| Name that Greek Letter | 0 | - | 4.93 | 324,230 |
| Malta Country Quiz | 0 | - | 4.81 | 31,125 |
| Countries That Use the Euro | 0 | - | 4.95 | 105,659 |
| Europe Cities Map Quiz | 0 | - | 4.99 | 365,144 |
| 10 Easternmost Countries in Europe | 0 | - | 4.89 | 115,761 |
| The Only European Country ... | 0 | - | 4.91 | 217,518 |
| European Countries NOT in NATO | 0 | - | 4.90 | 61,651 |
| Ancient Greek Trivia | 0 | - | 4.62 | 67,087 |
| The Trojan War | 0 | - | 4.83 | 39,809 |
| Geography of Ancient Greece | 0 | - | 4.69 | 31,951 |
| Greek Mythology General Knowledge #1 | 0 | - | 4.85 | 112,298 |
| Ancient Roman Trivia #1 | 0 | - | 4.85 | 84,666 |
| Roman Emperors | 0 | - | 4.95 | 120,443 |
| History of The Netherlands | 0 | - | 4.46 | 17,491 |
| Countries Closest to Iceland | 0 | - | 4.90 | 73,767 |
| Medieval English History | 0 | - | 4.53 | 43,579 |
| History of Russia Quiz | 0 | - | 4.47 | 31,957 |
| French History Multiple Choice | 0 | - | 4.55 | 33,134 |
| 101 Figures from Greek Mythology | 0 | - | 4.99 | 126,570 |
| History of Italy | 0 | - | 4.55 | 32,062 |
| Geography of the Dutch Empire | 0 | - | 4.62 | 34,725 |
| Countries that Beat Iceland | 0 | - | 4.81 | 43,006 |
| Countries of the Spanish Empire | 0 | - | 4.52 | 77,307 |
| Invasions of Great Britain | 0 | - | 4.51 | 59,968 |
| British History Multiple Choice #1 | 0 | - | 4.46 | 55,216 |
| British History Multiple Choice #2 | 0 | - | 4.42 | 38,006 |
| Anglo-Saxon and Viking Kings of England | 0 | - | 4.74 | 12,276 |
| European Countries Ending in "IA" | 0 | - | 4.96 | 68,611 |
| Flags of Europe Quiz | 0 | - | 4.99 | 1,249,262 |
| Countries of Europe - One Minute Sprint | 0 | - | 4.94 | 1,331,136 |
| 10 Biggest European Countries by Area | 0 | - | 4.99 | 192,968 |
| 10 Westernmost Countries in Europe | 0 | - | 4.96 | 151,477 |
| Top 10 Languages Spoken in Europe | 0 | - | 4.96 | 219,494 |
| European Landmarks Map Quiz | 0 | - | 4.97 | 87,386 |
| Countries of Europe with an Empty Map | 0 | - | 5.00 | 311,536 |
| All First-Level Subdivisions of Europe on a Map | 0 | - | 4.98 | 173,388 |
| Countries with Territory in the Balkans | 0 | - | 4.96 | 89,616 |
| Eastern Europe Map Quiz | 0 | - | 4.91 | 128,450 |
| Slavic Countries | 0 | - | 4.96 | 111,931 |
| Regions of France | 0 | - | 4.70 | 121,307 |
| France Immigration by Country | 0 | - | 4.70 | 76,699 |
| History of Germany | 0 | - | 4.39 | 52,906 |
| Largest Islands of Greece | 0 | - | 4.59 | 48,156 |
| Olympian Gods Quiz | 0 | - | 4.96 | 502,039 |
| Ancient Greek Words | 0 | - | 4.93 | 111,945 |
| Provinces of the Netherlands | 0 | - | 4.80 | 41,514 |
| 100 Greatest Britons Quiz | 0 | - | 4.41 | 48,349 |
| Foods in a Full English Breakfast | 0 | - | 4.46 | 103,468 |
| The UK for Americans - True or False | 0 | - | 4.43 | 58,702 |
| Anglo-Saxon Kingdoms of England | 0 | - | 4.60 | 25,788 |
| Giant Great Britain Millennium Quiz | 0 | - | 4.78 | 20,189 |
| "Big Five" European Soccer Champions Since 2000 | 0 | - | 4.97 | 358,386 |
| European Geography By Letter - P #1 | 0 | - | 4.81 | 97,983 |
| European Diaspora - Top 11 Countries | 0 | - | 4.90 | 96,073 |
| 10 European Countries with the Most Tourists | 0 | - | 4.98 | 137,898 |
| Three Band Flags of Europe | 0 | - | 4.98 | 193,768 |
| Pixelated Europe Map | 0 | - | 4.88 | 123,029 |
| Monarchies of Europe | 0 | - | 4.90 | 98,387 |
| European Countries with One Border | 0 | - | 4.97 | 183,163 |
| European Countries with the Fewest Borders | 0 | - | 4.97 | 179,945 |
| European Geography By Letter - B #2 | 0 | - | 4.86 | 87,105 |
| Federal Subjects of Russia | 0 | - | 4.95 | 148,128 |
| Russian Inventions | 0 | - | 4.39 | 12,982 |
| Countries Formerly in Yugoslavia | 0 | - | 4.95 | 125,135 |
| History of Paris | 0 | - | 4.24 | 13,663 |
| States of the Holy Roman Empire in 1356 | 0 | - | 4.98 | 74,673 |
| Italian Inventions | 0 | - | 3.81 | 18,462 |
| Embarrassing Chapters in Italian History | 0 | - | 4.24 | 12,131 |
| Roman Numeral Decoding Quiz | 0 | - | 4.94 | 438,181 |
| Two Letter Roman Numerals | 0 | - | 4.97 | 56,291 |
| UK Cities Map Quiz | 0 | - | 4.96 | 465,281 |
| English Inventions #1 | 0 | - | 3.15 | 23,573 |
| English Inventions #2 | 0 | - | 3.95 | 8,709 |
| Counties of England Map Quiz | 0 | - | 4.97 | 308,271 |
| Embarrassing Chapters in British History | 0 | - | 4.29 | 32,304 |
| History of Scotland | 0 | - | 4.51 | 21,135 |
| Champions League Winners | 0 | - | 4.92 | 1,010,270 |
| Countries That Border Russia | 0 | - | 4.98 | 462,932 |
| History of Austria | 0 | - | 4.70 | 17,913 |
| Austria Country Quiz | 0 | - | 4.57 | 59,856 |
| Belgium Country Quiz | 0 | - | 4.72 | 71,965 |
| France Country Quiz | 0 | - | 4.70 | 135,226 |
| Geography of the French Empire | 0 | - | 4.45 | 27,158 |
| The French Revolution | 0 | - | 4.47 | 24,071 |
| Countries Bordering France | 0 | - | 4.83 | 403,662 |
| Kings of France Quiz | 0 | - | 4.20 | 32,828 |
| History of France | 0 | - | 4.61 | 57,303 |
| Countries Bordering Germany | 0 | - | 4.99 | 370,783 |
| Greece Country Quiz | 0 | - | 4.74 | 66,387 |
| Italy Country Quiz | 0 | - | 4.77 | 123,643 |
| Luxembourg Country Quiz | 0 | - | 4.78 | 33,831 |
| Monaco Country Quiz | 0 | - | 4.47 | 41,576 |
| Netherlands Country Quiz | 0 | - | 4.53 | 80,676 |
| The Vikings! | 0 | - | 4.46 | 28,372 |
| Sweden Immigration by Country | 0 | - | 4.55 | 56,222 |
| Portugal Country Quiz | 0 | - | 4.69 | 72,046 |
| The Portuguese Empire | 0 | - | 4.58 | 12,086 |
| Spain Country Quiz | 0 | - | 4.44 | 128,823 |
| Switzerland Country Quiz | 0 | - | 4.51 | 63,475 |
| United Kingdom A-Z | 0 | - | 4.52 | 88,176 |
| Largest Islands in the British Isles With a Map | 0 | - | 4.52 | 38,771 |
| British Geography Multiple Choice | 0 | - | 4.49 | 43,381 |
| 10 Closest Megacities to London | 0 | - | 4.90 | 17,760 |
| Counties of Wales | 0 | - | 4.63 | 39,395 |
| Top 10 Coldest European Countries | 0 | - | 4.94 | 193,388 |
| Top 10 Hottest European Countries | 0 | - | 4.88 | 127,295 |
| Category Elimination - European Geography #1 | 0 | - | 4.98 | 234,035 |
| European Map without 10 Random Countries | 0 | - | 4.97 | 277,466 |
| Category Elimination - European Geography #2 | 0 | - | 4.99 | 167,735 |
| Name a Valid European Country #1 | 0 | - | 4.99 | 262,440 |
| Name a Valid European Country #2 | 0 | - | 4.94 | 115,103 |
| Russia Country Quiz | 0 | - | 4.83 | 114,738 |
| Croatia Country Quiz | 0 | - | 4.83 | 43,505 |
| Bosnia and Herzegovina Country Quiz | 0 | - | 4.86 | 35,425 |
| Most-Mentioned Characters in the Iliad | 0 | - | 4.81 | 20,850 |
| Figures from Greek Mythology | 0 | - | 4.91 | 187,812 |
| History of Ireland | 0 | - | 4.39 | 31,297 |
| Countries Italy Declared War On | 0 | - | 4.75 | 43,435 |
| Denmark Country Quiz | 0 | - | 4.78 | 76,044 |
| Finland Country Quiz | 0 | - | 4.50 | 59,802 |
| Norway Country Quiz | 0 | - | 4.44 | 77,525 |
| Iceland Country Quiz | 0 | - | 4.69 | 43,256 |
| Canary Islands | 0 | - | 4.62 | 17,495 |
| Biggest Spanish Empire Countries | 0 | - | 4.91 | 116,299 |
| Switzerland Immigration by Country | 0 | - | 4.69 | 29,840 |
| British Spellings | 0 | - | 4.06 | 99,516 |
| British Groups of Things | 0 | - | 4.25 | 82,917 |
| British Acronyms | 0 | - | 4.40 | 45,858 |
| UK Immigration by Country | 0 | - | 4.94 | 141,196 |
| United Kingdom Decoder | 0 | - | 4.29 | 40,059 |
| United Kingdom Country Quiz | 0 | - | 4.96 | 140,255 |
| Biggest Immigrant Groups by Decade in the UK | 0 | - | 4.63 | 25,411 |
| English Monarchs in Order by First Letter | 0 | - | 4.38 | 31,967 |
| Geography of Scotland | 0 | - | 4.63 | 21,668 |
| Former Dominions of the British Empire | 0 | - | 4.27 | 24,214 |
| Scottish Inventions | 0 | - | 3.83 | 9,975 |
| All UEFA Champions League Teams Ever | 0 | - | 4.85 | 131,088 |
| Chinese Inventions | 0 | - | 4.30 | 33,826 |
| Countries of the Mongol Empire on a Map | 0 | - | 4.99 | 107,121 |
| U.S. Presidents Quiz | 0 | - | 5.00 | 3,709,922 |
| Deadliest U.S. Wars | 0 | - | 4.89 | 191,288 |
| European Countries by First 2 Letters | 0 | - | 4.95 | 530,759 |
| Countries That Touch the Adriatic Sea | 0 | - | 4.96 | 71,199 |
| European Countries with the Fewest Overnight Visitors | 0 | - | 4.80 | 41,676 |
| Top 10 European Countries by Coastline | 0 | - | 4.87 | 138,533 |
| Top 20 Football Clubs in Europe | 0 | - | 4.48 | 115,704 |
| 100 Longest Rivers in Europe - with a Map | 0 | - | 4.94 | 65,660 |
| Category Elimination - European Countries #1 | 0 | - | 4.90 | 90,427 |
| The Only Remaining European Country . . . | 0 | - | 4.41 | 64,430 |
| Countries that Border Poland | 0 | - | 4.99 | 172,649 |
| Non-Bordering Countries Closest to Russia | 0 | - | 4.91 | 83,000 |
| Countries With the Most Russian Speakers | 0 | - | 4.97 | 101,615 |
| Countries that Border Hungary | 0 | - | 4.98 | 104,453 |
| North Macedonia Country Quiz | 0 | - | 4.81 | 27,933 |
| Moldova Country Quiz | 0 | - | 4.82 | 30,894 |
| Countries Bordering Serbia | 0 | - | 4.96 | 92,687 |
| French Geography Quiz #1 | 0 | - | 4.89 | 34,876 |
| Countries Bordering Austria | 0 | - | 4.97 | 118,680 |
| 20 Questions About France | 0 | - | 4.11 | 32,433 |
