| States of the German Confederation in 1848 | 0 | - | 4.90 | 32,270 |
| States of Germany Map Quiz | 0 | - | 4.92 | 133,371 |
| States of Germany | 0 | - | 4.95 | 153,655 |
| Germany Immigration by Country | 0 | - | 4.86 | 81,396 |
| History of Germany | 0 | - | 4.39 | 52,923 |
| Germany Country Quiz | 0 | - | 4.83 | 158,381 |
| Modern Day Countries of the Dutch Empire on a Map | 0 | - | 4.86 | 61,396 |
| Countries of Iberia in History with a Map | 0 | - | 4.88 | 42,165 |
| Modern Day Countries of the Spanish Empire on a Map | 0 | - | 4.95 | 86,614 |
| Counties of England | 0 | - | 4.97 | 800,087 |
| Wives of King Henry VIII | 0 | - | 4.55 | 53,426 |
| Countries the UK Declared War On | 0 | - | 4.55 | 123,002 |
| Geography of the British Empire | 0 | - | 4.48 | 39,787 |
| Countries of Europe in 1815 With a Map | 0 | - | 4.99 | 150,903 |
| Countries of Europe in 1848 | 0 | - | 4.98 | 84,090 |
| Countries of Europe in 1870 with a Map | 0 | - | 4.95 | 65,288 |
| Every Country of Europe Since 1815 With a Map | 0 | - | 4.98 | 71,471 |
| Countries of Europe in 1360 with a Map | 0 | - | 4.99 | 57,268 |
| Regions of France Map Quiz | 0 | - | 4.97 | 145,019 |
| Ancient Greek Trivia | 0 | - | 4.62 | 67,134 |
| Geography of Ancient Greece | 0 | - | 4.69 | 31,979 |
| Regions of Italy | 0 | - | 4.92 | 76,474 |
| Netherlands Immigration by Country | 0 | - | 4.93 | 52,535 |
| Regions of Spain Quiz | 0 | - | 4.90 | 114,750 |
| Cantons of Switzerland | 0 | - | 4.98 | 51,506 |
| Countries and Territories of the United Kingdom | 0 | - | 4.90 | 94,277 |
| Medieval English History | 0 | - | 4.53 | 43,601 |
| Europe Map Quiz | 0 | - | 5.00 | 4,775,762 |
| French History Multiple Choice | 0 | - | 4.55 | 33,155 |
| Countries Bordering Germany | 0 | - | 4.99 | 371,011 |
| Anglo-Saxon and Viking Kings of England | 0 | - | 4.74 | 12,288 |
| Biggest Countries in Europe in 1700 | 0 | - | 4.73 | 58,648 |
| Andorra Country Quiz | 0 | - | 4.91 | 31,828 |
| France Cities Map Quiz | 0 | - | 4.96 | 167,344 |
| Departments of France | 0 | - | 4.93 | 54,662 |
| Germany Cities Map Quiz | 0 | - | 4.87 | 126,777 |
| States of the Holy Roman Empire in 1356 | 0 | - | 4.98 | 74,790 |
| Regions of Italy Map Quiz | 0 | - | 4.96 | 149,855 |
| Italy Cities Map Quiz | 0 | - | 4.97 | 152,736 |
| Countries Surrounding Rome | 0 | - | 4.97 | 49,656 |
| Spain Cities Map Quiz | 0 | - | 4.87 | 97,207 |
| Regions of Spain Map Quiz | 0 | - | 4.95 | 186,404 |
| Modern-Day Countries of the British Empire in 1921 | 0 | - | 4.99 | 118,214 |
| Name the English Monarchs | 0 | - | 4.91 | 504,666 |
| Anglo-Saxon Kingdoms of England | 0 | - | 4.60 | 25,793 |
| Giant Great Britain Millennium Quiz | 0 | - | 4.78 | 20,199 |
| England or Wales? | 0 | - | 4.94 | 45,844 |
| Europe by Borders in 30 Seconds | 0 | - | 4.98 | 429,692 |
| Biggest Cities in Germany in 1910 | 0 | - | 4.41 | 23,525 |
| Countries With the Most German Speakers | 0 | - | 4.89 | 97,729 |
| Embarrassing Chapters in British History | 0 | - | 4.29 | 32,312 |
| History of Scotland | 0 | - | 4.51 | 21,137 |
| Kings of France Quiz | 0 | - | 4.20 | 32,854 |
| Countries that Beat Germany | 0 | - | 4.94 | 106,872 |
| Country Quiz on a Map - Germany | 0 | - | 4.95 | 35,318 |
| German Inventions | 0 | - | 3.91 | 30,258 |
| Embarrassing Chapters in German History | 0 | - | 3.40 | 12,659 |
| The Trojan War | 0 | - | 4.83 | 39,880 |
| Letters of the Greek Alphabet | 0 | - | 4.97 | 649,845 |
| Name that Greek Letter | 0 | - | 4.93 | 324,419 |
| Greek Mythology General Knowledge #1 | 0 | - | 4.85 | 112,473 |
| Ancient Roman Trivia #1 | 0 | - | 4.85 | 85,286 |
| Roman Emperors | 0 | - | 4.95 | 120,641 |
| Malta Country Quiz | 0 | - | 4.81 | 31,152 |
| Top 10 Oldest African Countries | 0 | - | 4.88 | 28,105 |
| Countries That Use the Euro | 0 | - | 4.95 | 105,951 |
| Europe Cities Map Quiz | 0 | - | 4.99 | 365,404 |
| 10 Easternmost Countries in Europe | 0 | - | 4.89 | 116,352 |
| The Only European Country ... | 0 | - | 4.91 | 217,876 |
| European Countries NOT in NATO | 0 | - | 4.90 | 61,899 |
| History of Russia Quiz | 0 | - | 4.47 | 31,974 |
| 101 Figures from Greek Mythology | 0 | - | 4.99 | 126,818 |
| History of Italy | 0 | - | 4.55 | 32,090 |
| Geography of the Dutch Empire | 0 | - | 4.62 | 34,754 |
| History of The Netherlands | 0 | - | 4.46 | 17,503 |
| Countries of the Spanish Empire | 0 | - | 4.52 | 77,339 |
| Invasions of Great Britain | 0 | - | 4.51 | 60,001 |
| Former Dominions of the British Empire | 0 | - | 4.27 | 24,220 |
| British History Multiple Choice #1 | 0 | - | 4.46 | 55,239 |
| British History Multiple Choice #2 | 0 | - | 4.42 | 38,021 |
| European Countries Ending in "IA" | 0 | - | 4.96 | 68,716 |
| Flags of Europe Quiz | 0 | - | 4.99 | 1,251,080 |
| Countries of Europe - One Minute Sprint | 0 | - | 4.94 | 1,332,172 |
| 10 Biggest European Countries by Area | 0 | - | 4.99 | 193,130 |
| 10 Westernmost Countries in Europe | 0 | - | 4.96 | 151,692 |
| Top 10 Languages Spoken in Europe | 0 | - | 4.96 | 219,814 |
| European Landmarks Map Quiz | 0 | - | 4.97 | 87,493 |
| Countries of Europe with an Empty Map | 0 | - | 5.00 | 311,796 |
| All First-Level Subdivisions of Europe on a Map | 0 | - | 4.98 | 174,088 |
| Countries with Territory in the Balkans | 0 | - | 4.96 | 89,757 |
| Eastern Europe Map Quiz | 0 | - | 4.91 | 128,524 |
| Slavic Countries | 0 | - | 4.96 | 112,032 |
| 15 Most Populous Countries that Speak a Germanic Language | 0 | - | 4.39 | 82,672 |
| Olympian Gods Quiz | 0 | - | 4.96 | 502,406 |
| Ancient Greek Words | 0 | - | 4.93 | 112,083 |
| Oldest Cities in the United Kingdom | 0 | - | 4.39 | 23,769 |
| History of London | 0 | - | 4.33 | 26,235 |
| "Big Five" European Soccer Champions Since 2000 | 0 | - | 4.97 | 359,106 |
| Regions of France | 0 | - | 4.70 | 121,487 |
| France Immigration by Country | 0 | - | 4.70 | 76,748 |
| Largest Islands of Greece | 0 | - | 4.59 | 48,237 |
| Roman Numeral Decoding Quiz | 0 | - | 4.94 | 438,511 |
| Two Letter Roman Numerals | 0 | - | 4.97 | 56,346 |
| Provinces of the Netherlands | 0 | - | 4.80 | 41,569 |
| 100 Greatest Britons Quiz | 0 | - | 4.41 | 48,368 |
| UK Cities Map Quiz | 0 | - | 4.96 | 465,567 |
| Foods in a Full English Breakfast | 0 | - | 4.46 | 103,554 |
| The UK for Americans - True or False | 0 | - | 4.43 | 58,725 |
| Champions League Winners | 0 | - | 4.92 | 1,011,394 |
| European Geography By Letter - P #1 | 0 | - | 4.81 | 98,242 |
| European Diaspora - Top 11 Countries | 0 | - | 4.90 | 96,187 |
| 10 European Countries with the Most Tourists | 0 | - | 4.98 | 138,048 |
| Three Band Flags of Europe | 0 | - | 4.98 | 193,954 |
| Pixelated Europe Map | 0 | - | 4.88 | 123,132 |
| Monarchies of Europe | 0 | - | 4.90 | 98,486 |
| European Countries with One Border | 0 | - | 4.97 | 183,306 |
| European Countries with the Fewest Borders | 0 | - | 4.97 | 180,084 |
| European Geography By Letter - B #2 | 0 | - | 4.86 | 87,607 |
| Federal Subjects of Russia | 0 | - | 4.95 | 148,378 |
| Countries That Border Russia | 0 | - | 4.98 | 463,442 |
| Countries Formerly in Yugoslavia | 0 | - | 4.95 | 125,229 |
| History of Austria | 0 | - | 4.70 | 17,928 |
| Austria Country Quiz | 0 | - | 4.57 | 59,906 |
| Belgium Country Quiz | 0 | - | 4.72 | 72,024 |
| France Country Quiz | 0 | - | 4.70 | 135,328 |
| French Inventions | 0 | - | 4.10 | 13,911 |
| Geography of the French Empire | 0 | - | 4.45 | 27,178 |
| The French Revolution | 0 | - | 4.47 | 24,085 |
| Countries Bordering France | 0 | - | 4.83 | 403,951 |
| History of Paris | 0 | - | 4.24 | 13,665 |
| History of France | 0 | - | 4.61 | 57,375 |
| German Cities with the Most Tourists | 0 | - | 4.77 | 48,974 |
| Countries Closest to Germany A-Z | 0 | - | 4.98 | 27,436 |
| Greece Country Quiz | 0 | - | 4.74 | 66,444 |
| Italy Country Quiz | 0 | - | 4.77 | 123,742 |
| Embarrassing Chapters in Italian History | 0 | - | 4.24 | 12,136 |
| Luxembourg Country Quiz | 0 | - | 4.78 | 33,856 |
| Monaco Country Quiz | 0 | - | 4.47 | 41,601 |
| Netherlands Country Quiz | 0 | - | 4.53 | 80,732 |
| Nordic Cities Map Quiz | 0 | - | 4.77 | 90,605 |
| The Vikings! | 0 | - | 4.46 | 28,381 |
| Sweden Immigration by Country | 0 | - | 4.55 | 56,260 |
| Portugal Country Quiz | 0 | - | 4.69 | 72,112 |
| The Portuguese Empire | 0 | - | 4.58 | 12,088 |
| Spain Country Quiz | 0 | - | 4.44 | 128,930 |
| Switzerland Country Quiz | 0 | - | 4.51 | 63,508 |
| Counties of England Map Quiz | 0 | - | 4.97 | 308,418 |
| United Kingdom A-Z | 0 | - | 4.52 | 88,217 |
| Largest Islands in the British Isles With a Map | 0 | - | 4.52 | 38,790 |
| British Geography Multiple Choice | 0 | - | 4.49 | 43,399 |
| 10 Closest Megacities to London | 0 | - | 4.90 | 17,777 |
| Counties of Wales | 0 | - | 4.63 | 39,436 |
| Top 10 Coldest European Countries | 0 | - | 4.94 | 193,478 |
| Top 10 Hottest European Countries | 0 | - | 4.88 | 127,408 |
| Category Elimination - European Geography #1 | 0 | - | 4.98 | 234,647 |
| European Map without 10 Random Countries | 0 | - | 4.97 | 277,827 |
| Category Elimination - European Geography #2 | 0 | - | 4.99 | 168,069 |
| Name a Valid European Country #1 | 0 | - | 4.99 | 262,942 |
| Name a Valid European Country #2 | 0 | - | 4.94 | 115,310 |
| Russia Country Quiz | 0 | - | 4.83 | 114,821 |
| Croatia Country Quiz | 0 | - | 4.83 | 43,543 |
| Bosnia and Herzegovina Country Quiz | 0 | - | 4.86 | 35,456 |
| Most Popular Baby Girls Names in Germany | 0 | - | 4.51 | 38,906 |
| German History A-Z | 0 | - | 4.49 | 24,688 |
| Most-Mentioned Characters in the Iliad | 0 | - | 4.81 | 20,879 |
| Figures from Greek Mythology | 0 | - | 4.91 | 188,046 |
| History of Ireland | 0 | - | 4.39 | 31,325 |
| Countries Italy Declared War On | 0 | - | 4.75 | 43,496 |
| Byzantine History | 0 | - | 4.91 | 28,956 |
| Byzantine Emperors | 0 | - | 4.92 | 14,438 |
| Canary Islands | 0 | - | 4.62 | 17,503 |
| Biggest Spanish Empire Countries | 0 | - | 4.91 | 116,420 |
| Switzerland Immigration by Country | 0 | - | 4.69 | 29,889 |
| British Spellings | 0 | - | 4.06 | 99,532 |
| British Groups of Things | 0 | - | 4.25 | 82,944 |
| British Acronyms | 0 | - | 4.40 | 45,880 |
| UK Immigration by Country | 0 | - | 4.94 | 141,294 |
| United Kingdom Decoder | 0 | - | 4.29 | 40,070 |
| United Kingdom Country Quiz | 0 | - | 4.96 | 140,401 |
| Biggest Immigrant Groups by Decade in the UK | 0 | - | 4.63 | 25,475 |
| English Monarchs in Order by First Letter | 0 | - | 4.38 | 32,002 |
| Geography of Scotland | 0 | - | 4.63 | 21,689 |
| All UEFA Champions League Teams Ever | 0 | - | 4.85 | 131,312 |
| Countries of the Mongol Empire on a Map | 0 | - | 4.99 | 107,198 |
| U.S. Presidents Quiz | 0 | - | 5.00 | 3,713,513 |
| Deadliest U.S. Wars | 0 | - | 4.89 | 191,391 |
| Countries That Touch the Adriatic Sea | 0 | - | 4.96 | 71,238 |
| European Countries with the Fewest Overnight Visitors | 0 | - | 4.80 | 41,686 |
| Top 10 European Countries by Coastline | 0 | - | 4.88 | 138,569 |
| Top 20 Football Clubs in Europe | 0 | - | 4.48 | 115,939 |
| 100 Longest Rivers in Europe - with a Map | 0 | - | 4.94 | 65,703 |
| Category Elimination - European Countries #1 | 0 | - | 4.90 | 90,579 |
| The Only Remaining European Country . . . | 0 | - | 4.41 | 64,491 |
| Countries that Border Poland | 0 | - | 4.99 | 172,753 |
| Non-Bordering Countries Closest to Russia | 0 | - | 4.91 | 83,056 |
| Countries that Beat Russia | 0 | - | 4.81 | 83,199 |
| Countries With the Most Russian Speakers | 0 | - | 4.97 | 101,876 |
| Countries that Border Hungary | 0 | - | 4.98 | 104,537 |
| North Macedonia Country Quiz | 0 | - | 4.81 | 27,954 |
| Moldova Country Quiz | 0 | - | 4.82 | 30,918 |
