| States of the German Confederation in 1848 | 0 | - | 4.90 | 32,487 |
| States of Germany Map Quiz | 0 | - | 4.92 | 133,901 |
| States of Germany | 0 | - | 4.95 | 154,721 |
| Germany Immigration by Country | 0 | - | 4.86 | 81,747 |
| History of Germany | 0 | - | 4.39 | 52,989 |
| Germany Country Quiz | 0 | - | 4.82 | 158,948 |
| Modern Day Countries of the Dutch Empire on a Map | 0 | - | 4.87 | 61,734 |
| Countries of Iberia in History with a Map | 0 | - | 4.88 | 42,453 |
| Modern Day Countries of the Spanish Empire on a Map | 0 | - | 4.95 | 86,944 |
| Counties of England | 0 | - | 4.97 | 803,566 |
| Wives of King Henry VIII | 0 | - | 4.55 | 53,478 |
| Countries the UK Declared War On | 0 | - | 4.55 | 123,318 |
| Geography of the British Empire | 0 | - | 4.48 | 39,858 |
| Countries of Europe in 1815 With a Map | 0 | - | 4.99 | 151,468 |
| Countries of Europe in 1848 | 0 | - | 4.98 | 85,742 |
| Countries of Europe in 1870 with a Map | 0 | - | 4.95 | 65,902 |
| Every Country of Europe Since 1815 With a Map | 0 | - | 4.97 | 71,941 |
| Countries of Europe in 1360 with a Map | 0 | - | 4.99 | 57,653 |
| Regions of France Map Quiz | 0 | - | 4.97 | 145,736 |
| Ancient Greek Trivia | 0 | - | 4.62 | 67,258 |
| Geography of Ancient Greece | 0 | - | 4.69 | 32,057 |
| Regions of Italy | 0 | - | 4.92 | 77,175 |
| Netherlands Immigration by Country | 0 | - | 4.93 | 52,847 |
| Regions of Spain Quiz | 0 | - | 4.90 | 115,450 |
| Cantons of Switzerland | 0 | - | 4.98 | 51,826 |
| Countries and Territories of the United Kingdom | 0 | - | 4.90 | 94,574 |
| Medieval English History | 0 | - | 4.53 | 43,671 |
| Europe Map Quiz | 0 | - | 5.00 | 4,790,645 |
| French History Multiple Choice | 0 | - | 4.55 | 33,252 |
| Countries Bordering Germany | 0 | - | 4.99 | 372,033 |
| Anglo-Saxon and Viking Kings of England | 0 | - | 4.75 | 12,353 |
| Biggest Countries in Europe in 1700 | 0 | - | 4.73 | 58,778 |
| Andorra Country Quiz | 0 | - | 4.91 | 31,968 |
| France Cities Map Quiz | 0 | - | 4.96 | 167,898 |
| Departments of France | 0 | - | 4.93 | 55,271 |
| Germany Cities Map Quiz | 0 | - | 4.87 | 127,150 |
| States of the Holy Roman Empire in 1356 | 0 | - | 4.97 | 75,493 |
| Regions of Italy Map Quiz | 0 | - | 4.96 | 150,323 |
| Italy Cities Map Quiz | 0 | - | 4.97 | 153,136 |
| Countries Surrounding Rome | 0 | - | 4.97 | 49,755 |
| Spain Cities Map Quiz | 0 | - | 4.87 | 97,549 |
| Regions of Spain Map Quiz | 0 | - | 4.95 | 186,955 |
| Modern-Day Countries of the British Empire in 1921 | 0 | - | 4.99 | 118,916 |
| Name the English Monarchs | 0 | - | 4.91 | 506,978 |
| Anglo-Saxon Kingdoms of England | 0 | - | 4.60 | 25,831 |
| Giant Great Britain Millennium Quiz | 0 | - | 4.78 | 20,247 |
| England or Wales? | 0 | - | 4.94 | 45,994 |
| Europe by Borders in 30 Seconds | 0 | - | 4.98 | 431,140 |
| Biggest Cities in Germany in 1910 | 0 | - | 4.41 | 23,565 |
| Countries With the Most German Speakers | 0 | - | 4.89 | 98,874 |
| Embarrassing Chapters in British History | 0 | - | 4.30 | 32,390 |
| History of Scotland | 0 | - | 4.51 | 21,181 |
| Kings of France Quiz | 0 | - | 4.21 | 32,945 |
| Countries that Beat Germany | 0 | - | 4.94 | 107,415 |
| Country Quiz on a Map - Germany | 0 | - | 4.95 | 35,599 |
| German Inventions | 0 | - | 3.91 | 30,288 |
| Embarrassing Chapters in German History | 0 | - | 3.40 | 12,690 |
| The Trojan War | 0 | - | 4.83 | 40,021 |
| Letters of the Greek Alphabet | 0 | - | 4.97 | 652,402 |
| Name that Greek Letter | 0 | - | 4.93 | 325,125 |
| Greek Mythology General Knowledge #1 | 0 | - | 4.85 | 113,071 |
| Ancient Roman Trivia #1 | 0 | - | 4.85 | 85,642 |
| Roman Emperors | 0 | - | 4.95 | 121,322 |
| Malta Country Quiz | 0 | - | 4.81 | 31,247 |
| Top 10 Oldest African Countries | 0 | - | 4.88 | 28,275 |
| Countries That Use the Euro | 0 | - | 4.95 | 107,022 |
| Europe Cities Map Quiz | 0 | - | 4.99 | 366,406 |
| 10 Easternmost Countries in Europe | 0 | - | 4.87 | 117,329 |
| The Only European Country ... | 0 | - | 4.91 | 219,316 |
| European Countries NOT in NATO | 0 | - | 4.91 | 62,683 |
| History of Russia Quiz | 0 | - | 4.47 | 32,011 |
| 101 Figures from Greek Mythology | 0 | - | 4.99 | 127,705 |
| History of Italy | 0 | - | 4.55 | 32,165 |
| Geography of the Dutch Empire | 0 | - | 4.62 | 34,835 |
| History of The Netherlands | 0 | - | 4.46 | 17,563 |
| Countries of the Spanish Empire | 0 | - | 4.52 | 77,446 |
| Invasions of Great Britain | 0 | - | 4.51 | 60,120 |
| Former Dominions of the British Empire | 0 | - | 4.27 | 24,279 |
| British History Multiple Choice #1 | 0 | - | 4.46 | 55,339 |
| British History Multiple Choice #2 | 0 | - | 4.42 | 38,099 |
| European Countries Ending in "IA" | 0 | - | 4.96 | 69,127 |
| Flags of Europe Quiz | 0 | - | 4.99 | 1,259,767 |
| Countries of Europe - One Minute Sprint | 0 | - | 4.94 | 1,336,487 |
| 10 Biggest European Countries by Area | 0 | - | 4.99 | 193,672 |
| 10 Westernmost Countries in Europe | 0 | - | 4.96 | 152,269 |
| Top 10 Languages Spoken in Europe | 0 | - | 4.96 | 221,038 |
| European Landmarks Map Quiz | 0 | - | 4.97 | 87,851 |
| Countries of Europe with an Empty Map | 0 | - | 5.00 | 312,972 |
| All First-Level Subdivisions of Europe on a Map | 0 | - | 4.99 | 176,174 |
| Countries with Territory in the Balkans | 0 | - | 4.96 | 90,278 |
| Eastern Europe Map Quiz | 0 | - | 4.91 | 128,832 |
| Slavic Countries | 0 | - | 4.96 | 112,442 |
| 15 Most Populous Countries that Speak a Germanic Language | 0 | - | 4.40 | 82,808 |
| Olympian Gods Quiz | 0 | - | 4.96 | 504,062 |
| Ancient Greek Words | 0 | - | 4.93 | 112,568 |
| Oldest Cities in the United Kingdom | 0 | - | 4.39 | 23,835 |
| History of London | 0 | - | 4.33 | 26,279 |
| "Big Five" European Soccer Champions Since 2000 | 0 | - | 4.97 | 362,158 |
| Regions of France | 0 | - | 4.70 | 122,234 |
| France Immigration by Country | 0 | - | 4.70 | 76,969 |
| Largest Islands of Greece | 0 | - | 4.59 | 48,535 |
| Roman Numeral Decoding Quiz | 0 | - | 4.94 | 440,076 |
| Two Letter Roman Numerals | 0 | - | 4.97 | 56,558 |
| Provinces of the Netherlands | 0 | - | 4.80 | 41,847 |
| 100 Greatest Britons Quiz | 0 | - | 4.41 | 48,423 |
| UK Cities Map Quiz | 0 | - | 4.96 | 466,626 |
| Foods in a Full English Breakfast | 0 | - | 4.46 | 103,887 |
| The UK for Americans - True or False | 0 | - | 4.43 | 58,829 |
| Champions League Winners | 0 | - | 4.92 | 1,017,041 |
| European Geography By Letter - P #1 | 0 | - | 4.81 | 99,047 |
| European Diaspora - Top 11 Countries | 0 | - | 4.88 | 96,914 |
| 10 European Countries with the Most Tourists | 0 | - | 4.98 | 138,637 |
| Three Band Flags of Europe | 0 | - | 4.98 | 194,707 |
| Pixelated Europe Map | 0 | - | 4.88 | 123,552 |
| Monarchies of Europe | 0 | - | 4.90 | 98,961 |
| European Countries with One Border | 0 | - | 4.97 | 183,918 |
| European Countries with the Fewest Borders | 0 | - | 4.97 | 180,634 |
| European Geography By Letter - B #2 | 0 | - | 4.87 | 88,986 |
| Federal Subjects of Russia | 0 | - | 4.95 | 149,724 |
| Countries That Border Russia | 0 | - | 4.98 | 464,683 |
| Countries Formerly in Yugoslavia | 0 | - | 4.95 | 125,522 |
| History of Austria | 0 | - | 4.70 | 17,982 |
| Austria Country Quiz | 0 | - | 4.57 | 60,088 |
| Belgium Country Quiz | 0 | - | 4.72 | 72,300 |
| France Country Quiz | 0 | - | 4.70 | 135,728 |
| French Inventions | 0 | - | 4.10 | 13,930 |
| Geography of the French Empire | 0 | - | 4.45 | 27,222 |
| The French Revolution | 0 | - | 4.47 | 24,153 |
| Countries Bordering France | 0 | - | 4.83 | 405,119 |
| History of Paris | 0 | - | 4.24 | 13,683 |
| History of France | 0 | - | 4.61 | 57,673 |
| German Cities with the Most Tourists | 0 | - | 4.77 | 49,144 |
| Countries Closest to Germany A-Z | 0 | - | 4.98 | 27,639 |
| Greece Country Quiz | 0 | - | 4.74 | 66,668 |
| Italy Country Quiz | 0 | - | 4.77 | 124,125 |
| Embarrassing Chapters in Italian History | 0 | - | 4.24 | 12,170 |
| Luxembourg Country Quiz | 0 | - | 4.78 | 33,966 |
| Monaco Country Quiz | 0 | - | 4.48 | 41,708 |
| Netherlands Country Quiz | 0 | - | 4.52 | 80,986 |
| Nordic Cities Map Quiz | 0 | - | 4.77 | 90,766 |
| The Vikings! | 0 | - | 4.46 | 28,417 |
| Sweden Immigration by Country | 0 | - | 4.53 | 56,408 |
| Portugal Country Quiz | 0 | - | 4.69 | 72,362 |
| The Portuguese Empire | 0 | - | 4.58 | 12,114 |
| Spain Country Quiz | 0 | - | 4.44 | 129,322 |
| Switzerland Country Quiz | 0 | - | 4.52 | 63,675 |
| Counties of England Map Quiz | 0 | - | 4.97 | 309,153 |
| United Kingdom A-Z | 0 | - | 4.51 | 88,401 |
| Largest Islands in the British Isles With a Map | 0 | - | 4.52 | 38,873 |
| British Geography Multiple Choice | 0 | - | 4.49 | 43,470 |
| 10 Closest Megacities to London | 0 | - | 4.90 | 17,847 |
| Counties of Wales | 0 | - | 4.63 | 39,657 |
| Top 10 Coldest European Countries | 0 | - | 4.94 | 193,989 |
| Top 10 Hottest European Countries | 0 | - | 4.88 | 127,876 |
| Category Elimination - European Geography #1 | 0 | - | 4.98 | 236,090 |
| European Map without 10 Random Countries | 0 | - | 4.97 | 279,103 |
| Category Elimination - European Geography #2 | 0 | - | 4.99 | 169,077 |
| Name a Valid European Country #1 | 0 | - | 4.99 | 264,974 |
| Name a Valid European Country #2 | 0 | - | 4.94 | 116,004 |
| Russia Country Quiz | 0 | - | 4.83 | 115,380 |
| Croatia Country Quiz | 0 | - | 4.83 | 43,794 |
| Bosnia and Herzegovina Country Quiz | 0 | - | 4.83 | 35,610 |
| Most Popular Baby Girls Names in Germany | 0 | - | 4.51 | 39,011 |
| German History A-Z | 0 | - | 4.49 | 24,928 |
| Most-Mentioned Characters in the Iliad | 0 | - | 4.81 | 20,989 |
| Figures from Greek Mythology | 0 | - | 4.91 | 189,024 |
| History of Ireland | 0 | - | 4.39 | 31,451 |
| Countries Italy Declared War On | 0 | - | 4.74 | 47,038 |
| Byzantine History | 0 | - | 4.91 | 29,033 |
| Byzantine Emperors | 0 | - | 4.93 | 14,628 |
| Canary Islands | 0 | - | 4.62 | 17,544 |
| Biggest Spanish Empire Countries | 0 | - | 4.91 | 117,016 |
| Switzerland Immigration by Country | 0 | - | 4.69 | 30,106 |
| British Spellings | 0 | - | 4.06 | 99,616 |
| British Groups of Things | 0 | - | 4.26 | 83,032 |
| British Acronyms | 0 | - | 4.40 | 45,954 |
| UK Immigration by Country | 0 | - | 4.94 | 141,812 |
| United Kingdom Decoder | 0 | - | 4.29 | 40,122 |
| United Kingdom Country Quiz | 0 | - | 4.96 | 141,138 |
| Biggest Immigrant Groups by Decade in the UK | 0 | - | 4.63 | 25,790 |
| English Monarchs in Order by First Letter | 0 | - | 4.38 | 32,176 |
| Geography of Scotland | 0 | - | 4.63 | 21,752 |
| All UEFA Champions League Teams Ever | 0 | - | 4.85 | 132,304 |
| Countries of the Mongol Empire on a Map | 0 | - | 4.99 | 107,622 |
| U.S. Presidents Quiz | 0 | - | 5.00 | 3,728,325 |
| Deadliest U.S. Wars | 0 | - | 4.89 | 191,875 |
| Countries That Touch the Adriatic Sea | 0 | - | 4.96 | 71,383 |
| European Countries with the Fewest Overnight Visitors | 0 | - | 4.80 | 41,724 |
| Top 10 European Countries by Coastline | 0 | - | 4.86 | 138,777 |
| Top 20 Football Clubs in Europe | 0 | - | 4.48 | 123,125 |
| 100 Longest Rivers in Europe - with a Map | 0 | - | 4.94 | 66,000 |
| Category Elimination - European Countries #1 | 0 | - | 4.90 | 91,167 |
| The Only Remaining European Country . . . | 0 | - | 4.41 | 64,725 |
| Countries that Border Poland | 0 | - | 4.99 | 173,257 |
| Non-Bordering Countries Closest to Russia | 0 | - | 4.91 | 83,314 |
| Countries that Beat Russia | 0 | - | 4.81 | 83,674 |
| Countries With the Most Russian Speakers | 0 | - | 4.97 | 103,043 |
| Countries that Border Hungary | 0 | - | 4.98 | 105,046 |
| North Macedonia Country Quiz | 0 | - | 4.81 | 28,072 |
| Moldova Country Quiz | 0 | - | 4.82 | 31,045 |
