| States of the German Confederation in 1848 | 0 | - | 4.89 | 31,858 |
| States of Germany Map Quiz | 0 | - | 4.91 | 132,478 |
| States of Germany | 0 | - | 4.96 | 151,738 |
| Germany Immigration by Country | 0 | - | 4.85 | 80,830 |
| Germany Country Quiz | 0 | - | 4.82 | 157,491 |
| Modern Day Countries of the Dutch Empire on a Map | 0 | - | 4.86 | 60,879 |
| Countries of Iberia in History with a Map | 0 | - | 4.87 | 41,491 |
| Modern Day Countries of the Spanish Empire on a Map | 0 | - | 4.95 | 86,045 |
| Counties of England | 0 | - | 4.97 | 794,319 |
| Wives of King Henry VIII | 0 | - | 4.55 | 53,300 |
| Countries the UK Declared War On | 0 | - | 4.61 | 122,259 |
| Geography of the British Empire | 0 | - | 4.48 | 39,626 |
| Countries of Europe in 1815 With a Map | 0 | - | 4.99 | 149,817 |
| Countries of Europe in 1848 | 0 | - | 4.99 | 76,074 |
| Countries of Europe in 1870 with a Map | 0 | - | 4.95 | 64,225 |
| Every Country of Europe Since 1815 With a Map | 0 | - | 4.98 | 70,661 |
| Countries of Europe in 1360 with a Map | 0 | - | 4.99 | 56,561 |
| Regions of France Map Quiz | 0 | - | 4.97 | 144,062 |
| Ancient Greek Trivia | 0 | - | 4.62 | 66,919 |
| Geography of Ancient Greece | 0 | - | 4.69 | 31,868 |
| Regions of Italy | 0 | - | 4.92 | 75,489 |
| Netherlands Immigration by Country | 0 | - | 4.93 | 51,699 |
| Regions of Spain Quiz | 0 | - | 4.90 | 113,570 |
| Cantons of Switzerland | 0 | - | 4.98 | 50,947 |
| Countries and Territories of the United Kingdom | 0 | - | 4.89 | 93,498 |
| Medieval English History | 0 | - | 4.53 | 43,448 |
| Europe Map Quiz | 0 | - | 5.00 | 4,753,600 |
| French History Multiple Choice | 0 | - | 4.55 | 32,992 |
| Countries Bordering Germany | 0 | - | 4.99 | 368,498 |
| Anglo-Saxon and Viking Kings of England | 0 | - | 4.74 | 12,178 |
| Biggest Countries in Europe in 1700 | 0 | - | 4.73 | 58,375 |
| France Cities Map Quiz | 0 | - | 4.96 | 166,352 |
| Departments of France | 0 | - | 4.93 | 53,682 |
| Germany Cities Map Quiz | 0 | - | 4.87 | 125,820 |
| States of the Holy Roman Empire in 1356 | 0 | - | 4.97 | 73,469 |
| Italy Country Quiz | 0 | - | 4.82 | 123,126 |
| Regions of Italy Map Quiz | 0 | - | 4.96 | 149,037 |
| Italy Cities Map Quiz | 0 | - | 4.97 | 151,742 |
| Countries Surrounding Rome | 0 | - | 4.97 | 49,507 |
| Spain Cities Map Quiz | 0 | - | 4.87 | 96,609 |
| Regions of Spain Map Quiz | 0 | - | 4.95 | 185,302 |
| Modern-Day Countries of the British Empire in 1921 | 0 | - | 4.99 | 117,147 |
| Name the English Monarchs | 0 | - | 4.91 | 501,181 |
| Anglo-Saxon Kingdoms of England | 0 | - | 4.60 | 25,733 |
| Giant Great Britain Millennium Quiz | 0 | - | 4.78 | 20,125 |
| England or Wales? | 0 | - | 4.94 | 45,579 |
| Europe by Borders in 30 Seconds | 0 | - | 4.98 | 427,312 |
| Biggest Cities in Germany in 1910 | 0 | - | 4.41 | 23,455 |
| Countries With the Most German Speakers | 0 | - | 4.89 | 95,937 |
| Embarrassing Chapters in British History | 0 | - | 4.29 | 32,218 |
| History of Scotland | 0 | - | 4.51 | 21,068 |
| Andorra Country Quiz | 0 | - | 4.90 | 31,603 |
| Kings of France Quiz | 0 | - | 4.20 | 32,673 |
| Countries that Beat Germany | 0 | - | 4.95 | 106,059 |
| Country Quiz on a Map - Germany | 0 | - | 4.95 | 34,879 |
| German Inventions | 0 | - | 3.91 | 30,216 |
| Embarrassing Chapters in German History | 0 | - | 3.41 | 12,614 |
| The Trojan War | 0 | - | 4.83 | 39,629 |
| Letters of the Greek Alphabet | 0 | - | 4.97 | 645,811 |
| Name that Greek Letter | 0 | - | 4.93 | 322,988 |
| Greek Mythology General Knowledge #1 | 0 | - | 4.85 | 111,472 |
| Ancient Roman Trivia #1 | 0 | - | 4.85 | 84,389 |
| Roman Emperors | 0 | - | 4.95 | 119,593 |
| Malta Country Quiz | 0 | - | 4.81 | 30,988 |
| Top 10 Oldest African Countries | 0 | - | 4.88 | 27,852 |
| Countries That Use the Euro | 0 | - | 4.95 | 104,392 |
| Europe Cities Map Quiz | 0 | - | 4.99 | 363,813 |
| 10 Easternmost Countries in Europe | 0 | - | 4.89 | 114,711 |
| The Only European Country ... | 0 | - | 4.91 | 215,833 |
| European Countries NOT in NATO | 0 | - | 4.90 | 60,659 |
| History of Russia Quiz | 0 | - | 4.49 | 31,874 |
| 101 Figures from Greek Mythology | 0 | - | 4.99 | 125,431 |
| History of Italy | 0 | - | 4.55 | 31,928 |
| Geography of the Dutch Empire | 0 | - | 4.61 | 34,603 |
| History of The Netherlands | 0 | - | 4.46 | 17,400 |
| Countries of the Spanish Empire | 0 | - | 4.52 | 77,153 |
| Invasions of Great Britain | 0 | - | 4.51 | 59,781 |
| Former Dominions of the British Empire | 0 | - | 4.27 | 24,156 |
| British History Multiple Choice #1 | 0 | - | 4.46 | 55,087 |
| British History Multiple Choice #2 | 0 | - | 4.42 | 37,921 |
| European Countries Ending in "IA" | 0 | - | 4.96 | 68,026 |
| Flags of Europe Quiz | 0 | - | 4.99 | 1,238,989 |
| Countries of Europe - One Minute Sprint | 0 | - | 4.94 | 1,325,639 |
| 10 Biggest European Countries by Area | 0 | - | 4.99 | 192,367 |
| 10 Westernmost Countries in Europe | 0 | - | 4.96 | 150,912 |
| Top 10 Languages Spoken in Europe | 0 | - | 4.96 | 218,014 |
| European Landmarks Map Quiz | 0 | - | 4.97 | 86,932 |
| Countries of Europe with an Empty Map | 0 | - | 5.00 | 309,856 |
| All First-Level Subdivisions of Europe on a Map | 0 | - | 4.98 | 170,303 |
| Countries with Territory in the Balkans | 0 | - | 4.96 | 88,933 |
| Eastern Europe Map Quiz | 0 | - | 4.91 | 127,672 |
| Slavic Countries | 0 | - | 4.96 | 111,436 |
| 15 Most Populous Countries that Speak a Germanic Language | 0 | - | 4.39 | 82,485 |
| Olympian Gods Quiz | 0 | - | 4.96 | 499,354 |
| Ancient Greek Words | 0 | - | 4.93 | 111,287 |
| Oldest Cities in the United Kingdom | 0 | - | 4.39 | 23,690 |
| History of London | 0 | - | 4.33 | 26,160 |
| "Big Five" European Soccer Champions Since 2000 | 0 | - | 4.97 | 353,913 |
| Regions of France | 0 | - | 4.75 | 120,326 |
| France Immigration by Country | 0 | - | 4.70 | 76,368 |
| Largest Islands of Greece | 0 | - | 4.59 | 47,839 |
| Roman Numeral Decoding Quiz | 0 | - | 4.94 | 435,912 |
| Two Letter Roman Numerals | 0 | - | 4.97 | 55,974 |
| Provinces of the Netherlands | 0 | - | 4.80 | 41,194 |
| 100 Greatest Britons Quiz | 0 | - | 4.41 | 48,224 |
| UK Cities Map Quiz | 0 | - | 4.96 | 463,888 |
| Foods in a Full English Breakfast | 0 | - | 4.46 | 103,032 |
| The UK for Americans - True or False | 0 | - | 4.43 | 58,571 |
| Champions League Winners | 0 | - | 4.92 | 1,003,241 |
| European Diaspora - Top 11 Countries | 0 | - | 4.90 | 95,632 |
| 10 European Countries with the Most Tourists | 0 | - | 4.98 | 137,189 |
| Three Band Flags of Europe | 0 | - | 4.98 | 192,833 |
| Pixelated Europe Map | 0 | - | 4.88 | 122,452 |
| Monarchies of Europe | 0 | - | 4.90 | 97,890 |
| European Countries with One Border | 0 | - | 4.97 | 182,440 |
| European Countries with the Fewest Borders | 0 | - | 4.97 | 179,253 |
| European Geography By Letter - B #2 | 0 | - | 4.85 | 77,769 |
| Federal Subjects of Russia | 0 | - | 4.95 | 146,111 |
| Countries That Border Russia | 0 | - | 4.98 | 460,955 |
| Countries Formerly in Yugoslavia | 0 | - | 4.95 | 124,686 |
| History of Austria | 0 | - | 4.70 | 17,831 |
| Austria Country Quiz | 0 | - | 4.57 | 59,607 |
| Belgium Country Quiz | 0 | - | 4.70 | 71,618 |
| France Country Quiz | 0 | - | 4.70 | 134,690 |
| French Inventions | 0 | - | 4.08 | 13,889 |
| Geography of the French Empire | 0 | - | 4.45 | 27,017 |
| The French Revolution | 0 | - | 4.46 | 23,894 |
| Countries Bordering France | 0 | - | 4.83 | 401,736 |
| History of Paris | 0 | - | 4.24 | 13,633 |
| History of France | 0 | - | 4.59 | 56,779 |
| German Cities with the Most Tourists | 0 | - | 4.77 | 48,716 |
| Countries Closest to Germany A-Z | 0 | - | 4.98 | 27,203 |
| Greece Country Quiz | 0 | - | 4.74 | 66,097 |
| Embarrassing Chapters in Italian History | 0 | - | 4.24 | 12,084 |
| Luxembourg Country Quiz | 0 | - | 4.78 | 33,676 |
| Monaco Country Quiz | 0 | - | 4.47 | 41,423 |
| Netherlands Country Quiz | 0 | - | 4.53 | 80,350 |
| Nordic Cities Map Quiz | 0 | - | 4.77 | 90,356 |
| The Vikings! | 0 | - | 4.46 | 28,314 |
| Sweden Immigration by Country | 0 | - | 4.55 | 56,010 |
| Portugal Country Quiz | 0 | - | 4.69 | 71,712 |
| The Portuguese Empire | 0 | - | 4.58 | 12,043 |
| Spain Country Quiz | 0 | - | 4.45 | 128,244 |
| Switzerland Country Quiz | 0 | - | 4.51 | 63,231 |
| Counties of England Map Quiz | 0 | - | 4.97 | 306,973 |
| United Kingdom A-Z | 0 | - | 4.53 | 87,540 |
| Largest Islands in the British Isles With a Map | 0 | - | 4.52 | 38,669 |
| British Geography Multiple Choice | 0 | - | 4.49 | 43,290 |
| 10 Closest Megacities to London | 0 | - | 4.90 | 17,654 |
| Counties of Wales | 0 | - | 4.63 | 39,168 |
| Countries of the Mongol Empire on a Map | 0 | - | 4.99 | 106,554 |
| Top 10 Coldest European Countries | 0 | - | 4.94 | 192,813 |
| Top 10 Hottest European Countries | 0 | - | 4.88 | 126,717 |
| Category Elimination - European Geography #1 | 0 | - | 4.98 | 232,443 |
| European Map without 10 Random Countries | 0 | - | 4.97 | 276,169 |
| Category Elimination - European Geography #2 | 0 | - | 4.99 | 166,547 |
| Name a Valid European Country #1 | 0 | - | 4.99 | 259,709 |
| Name a Valid European Country #2 | 0 | - | 4.94 | 114,249 |
| Russia Country Quiz | 0 | - | 4.85 | 114,223 |
| Croatia Country Quiz | 0 | - | 4.83 | 43,207 |
| Bosnia and Herzegovina Country Quiz | 0 | - | 4.86 | 35,276 |
| Most Popular Baby Girls Names in Germany | 0 | - | 4.51 | 38,750 |
| German History A-Z | 0 | - | 4.49 | 24,561 |
| Figures from Greek Mythology | 0 | - | 4.91 | 186,322 |
| History of Ireland | 0 | - | 4.39 | 31,087 |
| Countries Italy Declared War On | 0 | - | 4.75 | 43,232 |
| Byzantine History | 0 | - | 4.91 | 28,746 |
| Canary Islands | 0 | - | 4.62 | 17,458 |
| Biggest Spanish Empire Countries | 0 | - | 4.91 | 115,658 |
| Switzerland Immigration by Country | 0 | - | 4.70 | 29,564 |
| British Spellings | 0 | - | 4.06 | 99,395 |
| British Groups of Things | 0 | - | 4.25 | 82,823 |
| British Acronyms | 0 | - | 4.39 | 45,744 |
| UK Immigration by Country | 0 | - | 4.94 | 140,598 |
| United Kingdom Decoder | 0 | - | 4.29 | 40,011 |
| United Kingdom Country Quiz | 0 | - | 4.96 | 139,322 |
| Biggest Immigrant Groups by Decade in the UK | 0 | - | 4.63 | 24,974 |
| English Monarchs in Order by First Letter | 0 | - | 4.38 | 31,646 |
| Geography of Scotland | 0 | - | 4.63 | 21,580 |
| All UEFA Champions League Teams Ever | 0 | - | 4.85 | 129,639 |
| U.S. Presidents Quiz | 0 | - | 5.00 | 3,686,185 |
| Deadliest U.S. Wars | 0 | - | 4.89 | 190,450 |
| Countries That Touch the Adriatic Sea | 0 | - | 4.96 | 71,020 |
| European Countries with the Fewest Overnight Visitors | 0 | - | 4.80 | 41,640 |
| Top 10 European Countries by Coastline | 0 | - | 4.87 | 138,255 |
| Top 20 Football Clubs in Europe | 0 | - | 4.48 | 114,277 |
| 100 Longest Rivers in Europe - with a Map | 0 | - | 4.94 | 65,305 |
| Category Elimination - European Countries #1 | 0 | - | 4.89 | 89,701 |
| The Only Remaining European Country . . . | 0 | - | 4.41 | 64,135 |
| Countries that Border Poland | 0 | - | 4.99 | 171,999 |
| Non-Bordering Countries Closest to Russia | 0 | - | 4.91 | 82,685 |
| Countries that Beat Russia | 0 | - | 4.81 | 82,425 |
| Countries With the Most Russian Speakers | 0 | - | 4.97 | 100,073 |
| Countries that Border Hungary | 0 | - | 4.98 | 104,062 |
| North Macedonia Country Quiz | 0 | - | 4.81 | 27,787 |
| Moldova Country Quiz | 0 | - | 4.82 | 30,723 |
| Countries Bordering Serbia | 0 | - | 4.96 | 92,216 |
| French Geography Quiz #1 | 0 | - | 4.89 | 34,700 |
| Countries Bordering Austria | 0 | - | 4.97 | 118,159 |
| 20 Questions About France | 0 | - | 4.11 | 32,383 |
