| States of the German Confederation in 1848 | 0 | - | 4.90 | 32,534 |
| States of Germany Map Quiz | 0 | - | 4.92 | 134,069 |
| States of Germany | 0 | - | 4.95 | 155,066 |
| Germany Immigration by Country | 0 | - | 4.86 | 81,867 |
| Counties of England | 0 | - | 4.97 | 804,800 |
| History of Italy | 0 | - | 4.55 | 32,200 |
| Geography of the Dutch Empire | 0 | - | 4.62 | 34,867 |
| Countries of the Spanish Empire | 0 | - | 4.52 | 77,485 |
| Invasions of Great Britain | 0 | - | 4.51 | 60,157 |
| Europe Map Quiz | 0 | - | 5.00 | 4,795,458 |
| Countries of Europe in 1815 With a Map | 0 | - | 4.99 | 151,654 |
| Countries of Europe in 1848 | 0 | - | 4.98 | 86,281 |
| Countries of Europe in 1870 with a Map | 0 | - | 4.95 | 66,110 |
| Every Country of Europe Since 1815 With a Map | 0 | - | 4.97 | 72,094 |
| Countries of Europe in 1360 with a Map | 0 | - | 4.99 | 57,795 |
| Regions of France Map Quiz | 0 | - | 4.97 | 145,877 |
| Regions of Italy | 0 | - | 4.92 | 77,337 |
| Netherlands Immigration by Country | 0 | - | 4.93 | 52,974 |
| Regions of Spain Quiz | 0 | - | 4.91 | 115,689 |
| Cantons of Switzerland | 0 | - | 4.98 | 51,971 |
| Countries and Territories of the United Kingdom | 0 | - | 4.90 | 94,701 |
| 10 Closest Megacities to London | 0 | - | 4.90 | 17,879 |
| Biggest Countries in Europe in 1700 | 0 | - | 4.74 | 58,846 |
| Germany Country Quiz | 0 | - | 4.82 | 159,170 |
| Countries Bordering Germany | 0 | - | 4.99 | 372,387 |
| History of Germany | 0 | - | 4.39 | 53,011 |
| Europe by Borders in 30 Seconds | 0 | - | 4.98 | 431,601 |
| History of Austria | 0 | - | 4.70 | 17,994 |
| Geography of the French Empire | 0 | - | 4.45 | 27,242 |
| The French Revolution | 0 | - | 4.47 | 24,175 |
| States of the Holy Roman Empire in 1356 | 0 | - | 4.97 | 75,686 |
| The Vikings! | 0 | - | 4.46 | 28,434 |
| The Portuguese Empire | 0 | - | 4.58 | 12,120 |
| Name the English Monarchs | 0 | - | 4.91 | 507,712 |
| History of France | 0 | - | 4.61 | 57,771 |
| Countries With the Most German Speakers | 0 | - | 4.89 | 99,317 |
| Wives of King Henry VIII | 0 | - | 4.55 | 53,498 |
| Countries the UK Declared War On | 0 | - | 4.55 | 123,417 |
| Geography of the British Empire | 0 | - | 4.48 | 39,892 |
| Malta Country Quiz | 0 | - | 4.81 | 31,277 |
| Countries That Use the Euro | 0 | - | 4.95 | 107,398 |
| Europe Cities Map Quiz | 0 | - | 4.99 | 366,723 |
| 10 Easternmost Countries in Europe | 0 | - | 4.87 | 117,620 |
| The Only European Country ... | 0 | - | 4.91 | 219,794 |
| European Countries NOT in NATO | 0 | - | 4.91 | 62,939 |
| Letters of the Greek Alphabet | 0 | - | 4.97 | 653,406 |
| Name that Greek Letter | 0 | - | 4.93 | 325,417 |
| History of The Netherlands | 0 | - | 4.46 | 17,582 |
| History of Russia Quiz | 0 | - | 4.47 | 32,033 |
| Countries that Beat Germany | 0 | - | 4.94 | 107,575 |
| Country Quiz on a Map - Germany | 0 | - | 4.95 | 35,698 |
| The Trojan War | 0 | - | 4.83 | 40,126 |
| Greek Mythology General Knowledge #1 | 0 | - | 4.85 | 113,365 |
| Ancient Roman Trivia #1 | 0 | - | 4.85 | 85,735 |
| Roman Emperors | 0 | - | 4.95 | 121,525 |
| Flags of Europe Quiz | 0 | - | 4.99 | 1,262,658 |
| Countries of Europe - One Minute Sprint | 0 | - | 4.94 | 1,337,810 |
| 10 Biggest European Countries by Area | 0 | - | 4.99 | 193,858 |
| 10 Westernmost Countries in Europe | 0 | - | 4.96 | 152,600 |
| Top 10 Languages Spoken in Europe | 0 | - | 4.96 | 221,460 |
| European Landmarks Map Quiz | 0 | - | 4.97 | 87,963 |
| Countries of Europe with an Empty Map | 0 | - | 5.00 | 313,365 |
| All First-Level Subdivisions of Europe on a Map | 0 | - | 4.99 | 176,801 |
| Countries with Territory in the Balkans | 0 | - | 4.96 | 90,445 |
| Eastern Europe Map Quiz | 0 | - | 4.91 | 128,965 |
| Slavic Countries | 0 | - | 4.96 | 112,569 |
| French History Multiple Choice | 0 | - | 4.55 | 33,285 |
| Germany Multiple Choice | 0 | - | 4.84 | 54,776 |
| Geography of Germany | 0 | - | 4.36 | 17,453 |
| 101 Figures from Greek Mythology | 0 | - | 4.99 | 128,130 |
| History of Spain | 0 | - | 4.23 | 21,179 |
| Anglo-Saxon Kingdoms of England | 0 | - | 4.60 | 25,836 |
| Giant Great Britain Millennium Quiz | 0 | - | 4.78 | 20,259 |
| "Big Five" European Soccer Champions Since 2000 | 0 | - | 4.97 | 363,101 |
| Anglo-Saxon and Viking Kings of England | 0 | - | 4.75 | 12,369 |
| Regions of France | 0 | - | 4.70 | 122,524 |
| France Immigration by Country | 0 | - | 4.70 | 77,045 |
| Largest Islands of Greece | 0 | - | 4.59 | 48,623 |
| Olympian Gods Quiz | 0 | - | 4.96 | 504,750 |
| Ancient Greek Words | 0 | - | 4.93 | 112,741 |
| Provinces of the Netherlands | 0 | - | 4.80 | 41,982 |
| 100 Greatest Britons Quiz | 0 | - | 4.41 | 48,519 |
| Foods in a Full English Breakfast | 0 | - | 4.46 | 104,001 |
| The UK for Americans - True or False | 0 | - | 4.43 | 58,864 |
| European Geography By Letter - P #1 | 0 | - | 4.81 | 99,285 |
| European Diaspora - Top 11 Countries | 0 | - | 4.88 | 97,040 |
| 10 European Countries with the Most Tourists | 0 | - | 4.98 | 138,808 |
| Three Band Flags of Europe | 0 | - | 4.98 | 194,975 |
| Pixelated Europe Map | 0 | - | 4.88 | 123,726 |
| Monarchies of Europe | 0 | - | 4.90 | 99,100 |
| European Countries with One Border | 0 | - | 4.97 | 184,116 |
| European Countries with the Fewest Borders | 0 | - | 4.97 | 180,833 |
| European Geography By Letter - B #2 | 0 | - | 4.87 | 89,349 |
| Federal Subjects of Russia | 0 | - | 4.95 | 150,050 |
| Countries Formerly in Yugoslavia | 0 | - | 4.95 | 125,633 |
| French Inventions | 0 | - | 4.10 | 13,933 |
| History of Paris | 0 | - | 4.24 | 13,687 |
| Embarrassing Chapters in Italian History | 0 | - | 4.24 | 12,187 |
| Two Letter Roman Numerals | 0 | - | 4.97 | 56,662 |
| American to British Word Translation | 0 | - | 4.14 | 139,882 |
| Languages of the United Kingdom | 0 | - | 4.14 | 41,101 |
| Counties of England Map Quiz | 0 | - | 4.97 | 309,374 |
| British Geography Multiple Choice | 0 | - | 4.49 | 43,511 |
| Champions League Winners | 0 | - | 4.92 | 1,018,746 |
| Top 10 Coldest European Countries | 0 | - | 4.94 | 194,147 |
| Top 10 Hottest European Countries | 0 | - | 4.88 | 128,042 |
| Category Elimination - European Geography #1 | 0 | - | 4.98 | 236,514 |
| European Map without 10 Random Countries | 0 | - | 4.97 | 279,477 |
| Category Elimination - European Geography #2 | 0 | - | 4.99 | 169,408 |
| Name a Valid European Country #1 | 0 | - | 4.99 | 265,662 |
| Name a Valid European Country #2 | 0 | - | 4.94 | 116,210 |
| Russia Country Quiz | 0 | - | 4.83 | 115,518 |
| Countries That Border Russia | 0 | - | 4.98 | 465,109 |
| Croatia Country Quiz | 0 | - | 4.83 | 43,874 |
| Bosnia and Herzegovina Country Quiz | 0 | - | 4.85 | 35,675 |
| Andorra Country Quiz | 0 | - | 4.91 | 32,026 |
| France Cities Map Quiz | 0 | - | 4.96 | 168,130 |
| Departments of France | 0 | - | 4.93 | 55,486 |
| Countries Bordering France | 0 | - | 4.83 | 405,525 |
| Germany Cities Map Quiz | 0 | - | 4.87 | 127,314 |
| Countries Closest to Germany A-Z | 0 | - | 4.98 | 27,682 |
| Regions of Italy Map Quiz | 0 | - | 4.96 | 150,508 |
| Italy Cities Map Quiz | 0 | - | 4.97 | 153,302 |
| Countries Surrounding Rome | 0 | - | 4.97 | 49,797 |
| Roman Numeral Decoding Quiz | 0 | - | 4.94 | 440,692 |
| Spain Cities Map Quiz | 0 | - | 4.87 | 97,662 |
| Regions of Spain Map Quiz | 0 | - | 4.95 | 187,098 |
| Modern-Day Countries of the British Empire in 1921 | 0 | - | 4.99 | 119,138 |
| Former Dominions of the British Empire | 0 | - | 4.27 | 24,290 |
| England or Wales? | 0 | - | 4.94 | 46,096 |
| All UEFA Champions League Teams Ever | 0 | - | 4.85 | 132,624 |
| Countries of the Mongol Empire on a Map | 0 | - | 4.99 | 107,765 |
| European Countries by First 2 Letters | 0 | - | 4.95 | 533,281 |
| European Countries with the Fewest Overnight Visitors | 0 | - | 4.80 | 41,743 |
| Top 20 Football Clubs in Europe | 0 | - | 4.48 | 124,716 |
| The Only Remaining European Country . . . | 0 | - | 4.41 | 64,819 |
| Most Popular Baby Girls Names in Germany | 0 | - | 4.51 | 39,036 |
| German History A-Z | 0 | - | 4.49 | 24,957 |
| Ancient Greek Trivia | 0 | - | 4.62 | 67,304 |
| Geography of Ancient Greece | 0 | - | 4.69 | 32,081 |
| Most-Mentioned Characters in the Iliad | 0 | - | 4.81 | 21,095 |
| Figures from Greek Mythology | 0 | - | 4.92 | 194,626 |
| Countries Italy Declared War On | 0 | - | 4.77 | 50,471 |
| Canary Islands | 0 | - | 4.62 | 17,551 |
| Switzerland Immigration by Country | 0 | - | 4.69 | 30,192 |
| British Spellings | 0 | - | 4.06 | 99,642 |
| British Groups of Things | 0 | - | 4.26 | 83,051 |
| British Acronyms | 0 | - | 4.40 | 45,996 |
| United Kingdom Decoder | 0 | - | 4.29 | 40,136 |
| Biggest Immigrant Groups by Decade in the UK | 0 | - | 4.63 | 25,897 |
| English Monarchs in Order by First Letter | 0 | - | 4.38 | 32,242 |
| Geography of Scotland | 0 | - | 4.63 | 21,841 |
| Medieval English History | 0 | - | 4.53 | 43,700 |
| U.S. Presidents Quiz | 0 | - | 5.00 | 3,733,346 |
| Deadliest U.S. Wars | 0 | - | 4.89 | 192,097 |
| Countries That Touch the Adriatic Sea | 0 | - | 4.96 | 71,421 |
| Top 10 European Countries by Coastline | 0 | - | 4.86 | 138,855 |
| 100 Longest Rivers in Europe - with a Map | 0 | - | 4.94 | 66,095 |
| Category Elimination - European Countries #1 | 0 | - | 4.90 | 91,340 |
| Countries that Border Poland | 0 | - | 4.99 | 173,408 |
| Non-Bordering Countries Closest to Russia | 0 | - | 4.91 | 83,383 |
| Countries With the Most Russian Speakers | 0 | - | 4.97 | 103,482 |
| Countries that Border Hungary | 0 | - | 4.98 | 105,134 |
| North Macedonia Country Quiz | 0 | - | 4.81 | 28,102 |
| Moldova Country Quiz | 0 | - | 4.82 | 31,086 |
| Countries Bordering Serbia | 0 | - | 4.96 | 93,258 |
| French Geography Quiz #1 | 0 | - | 4.89 | 35,323 |
| Countries Bordering Austria | 0 | - | 4.97 | 119,087 |
| Countries that Visit France the Most | 0 | - | 4.85 | 46,254 |
| Countries Closest to Metropolitan France | 0 | - | 4.89 | 72,604 |
| 15 Most Populous Countries that Speak a Germanic Language | 0 | - | 4.40 | 82,835 |
| Greek Mythology General Knowledge #2 | 0 | - | 4.59 | 74,549 |
| Ancient Greece - Multiple Choice | 0 | - | 4.54 | 41,910 |
| Counties of Ireland | 0 | - | 4.92 | 197,799 |
| Italian Inventions | 0 | - | 3.81 | 18,487 |
| Countries Bordering Italy | 0 | - | 4.94 | 101,411 |
| Countries Closest to Italy | 0 | - | 4.97 | 199,803 |
| Ancient Roman Trivia #2 | 0 | - | 4.61 | 44,417 |
| Geography of the Roman Empire | 0 | - | 4.55 | 52,284 |
| Roman Names for Places | 0 | - | 4.62 | 58,820 |
| Byzantine History | 0 | - | 4.91 | 29,066 |
| Byzantine Emperors | 0 | - | 4.93 | 14,674 |
| Geography of the Spanish Empire | 0 | - | 4.49 | 37,339 |
| Countries Closest to Spain | 0 | - | 4.96 | 228,480 |
| British to American Word Translation | 0 | - | 3.74 | 255,414 |
| British Foods by Description | 0 | - | 3.94 | 48,419 |
| British and American Word Differences | 0 | - | 2.63 | 46,943 |
| English Inventions #1 | 0 | - | 3.15 | 23,609 |
| English Inventions #2 | 0 | - | 3.95 | 8,732 |
| British Geography Quiz #2 | 0 | - | 4.30 | 28,263 |
| Counties of the UK and Ireland | 0 | - | 4.98 | 132,756 |
| The Reign of Queen Elizabeth I | 0 | - | 4.53 | 32,013 |
| Houses of British Monarchs | 0 | - | 4.54 | 66,051 |
| British History Multiple Choice #1 | 0 | - | 4.46 | 55,364 |
| British History Multiple Choice #2 | 0 | - | 4.42 | 38,116 |
| Prime Ministers of the UK | 0 | - | 4.95 | 443,454 |
| World Capitals Closest to London | 0 | - | 4.88 | 111,464 |
| 50 Busiest Air Routes from London | 0 | - | 4.87 | 97,462 |
| Bridges of London | 0 | - | 4.17 | 10,153 |
| British Sport Trivia | 0 | - | 4.39 | 20,558 |
