| Modern Day Countries of the Dutch Empire on a Map | 0 | - | 4.86 | 61,137 |
| Countries of Iberia in History with a Map | 0 | - | 4.87 | 41,888 |
| Modern Day Countries of the Spanish Empire on a Map | 0 | - | 4.95 | 86,302 |
| Counties of England | 0 | - | 4.97 | 797,149 |
| States of the German Confederation in 1848 | 0 | - | 4.89 | 32,023 |
| Sweden Immigration by Country | 0 | - | 4.55 | 56,139 |
| Countries of Europe in 1815 With a Map | 0 | - | 4.99 | 150,432 |
| Countries of Europe in 1848 | 0 | - | 4.99 | 82,119 |
| Countries of Europe in 1870 with a Map | 0 | - | 4.95 | 64,728 |
| Every Country of Europe Since 1815 With a Map | 0 | - | 4.98 | 71,052 |
| Countries of Europe in 1360 with a Map | 0 | - | 4.99 | 56,922 |
| Regions of France Map Quiz | 0 | - | 4.97 | 144,472 |
| States of Germany Map Quiz | 0 | - | 4.91 | 132,864 |
| States of Germany | 0 | - | 4.96 | 152,677 |
| Germany Immigration by Country | 0 | - | 4.85 | 81,066 |
| Regions of Italy | 0 | - | 4.92 | 75,924 |
| Netherlands Immigration by Country | 0 | - | 4.93 | 52,204 |
| Regions of Spain Quiz | 0 | - | 4.90 | 113,995 |
| Cantons of Switzerland | 0 | - | 4.98 | 51,236 |
| Countries and Territories of the United Kingdom | 0 | - | 4.90 | 94,022 |
| Europe Map Quiz | 0 | - | 5.00 | 4,764,031 |
| Biggest Countries in Europe in 1700 | 0 | - | 4.73 | 58,505 |
| Andorra Country Quiz | 0 | - | 4.90 | 31,701 |
| France Cities Map Quiz | 0 | - | 4.96 | 166,801 |
| Departments of France | 0 | - | 4.93 | 54,168 |
| Germany Country Quiz | 0 | - | 4.83 | 157,895 |
| Germany Cities Map Quiz | 0 | - | 4.87 | 126,383 |
| Regions of Italy Map Quiz | 0 | - | 4.96 | 149,432 |
| Italy Cities Map Quiz | 0 | - | 4.97 | 152,082 |
| Countries Surrounding Rome | 0 | - | 4.97 | 49,555 |
| Spain Cities Map Quiz | 0 | - | 4.87 | 96,956 |
| Regions of Spain Map Quiz | 0 | - | 4.95 | 185,694 |
| Modern-Day Countries of the British Empire in 1921 | 0 | - | 4.99 | 117,651 |
| England or Wales? | 0 | - | 4.94 | 45,710 |
| Europe by Borders in 30 Seconds | 0 | - | 4.98 | 428,298 |
| The Vikings! | 0 | - | 4.46 | 28,347 |
| Name the English Monarchs | 0 | - | 4.91 | 502,863 |
| Wives of King Henry VIII | 0 | - | 4.55 | 53,356 |
| Countries the UK Declared War On | 0 | - | 4.61 | 122,502 |
| Geography of the British Empire | 0 | - | 4.48 | 39,679 |
| Letters of the Greek Alphabet | 0 | - | 4.97 | 647,628 |
| Name that Greek Letter | 0 | - | 4.93 | 323,500 |
| Malta Country Quiz | 0 | - | 4.81 | 31,069 |
| Countries That Use the Euro | 0 | - | 4.95 | 105,105 |
| Europe Cities Map Quiz | 0 | - | 4.99 | 364,548 |
| 10 Easternmost Countries in Europe | 0 | - | 4.89 | 115,313 |
| The Only European Country ... | 0 | - | 4.91 | 216,732 |
| European Countries NOT in NATO | 0 | - | 4.90 | 61,194 |
| Ancient Greek Trivia | 0 | - | 4.62 | 67,005 |
| The Trojan War | 0 | - | 4.83 | 39,736 |
| Geography of Ancient Greece | 0 | - | 4.69 | 31,916 |
| Greek Mythology General Knowledge #1 | 0 | - | 4.85 | 111,883 |
| Ancient Roman Trivia #1 | 0 | - | 4.85 | 84,547 |
| Roman Emperors | 0 | - | 4.95 | 120,089 |
| History of The Netherlands | 0 | - | 4.46 | 17,437 |
| Countries Closest to Iceland | 0 | - | 4.90 | 73,597 |
| Medieval English History | 0 | - | 4.53 | 43,518 |
| History of Russia Quiz | 0 | - | 4.47 | 31,922 |
| French History Multiple Choice | 0 | - | 4.55 | 33,047 |
| 101 Figures from Greek Mythology | 0 | - | 4.99 | 126,051 |
| History of Italy | 0 | - | 4.55 | 31,980 |
| Geography of the Dutch Empire | 0 | - | 4.62 | 34,664 |
| Countries of the Spanish Empire | 0 | - | 4.52 | 77,242 |
| Invasions of Great Britain | 0 | - | 4.51 | 59,874 |
| British History Multiple Choice #1 | 0 | - | 4.46 | 55,163 |
| British History Multiple Choice #2 | 0 | - | 4.42 | 37,967 |
| Anglo-Saxon and Viking Kings of England | 0 | - | 4.74 | 12,223 |
| European Countries Ending in "IA" | 0 | - | 4.96 | 68,333 |
| Flags of Europe Quiz | 0 | - | 4.99 | 1,244,673 |
| Countries of Europe - One Minute Sprint | 0 | - | 4.94 | 1,329,011 |
| 10 Biggest European Countries by Area | 0 | - | 4.99 | 192,699 |
| 10 Westernmost Countries in Europe | 0 | - | 4.96 | 151,238 |
| Top 10 Languages Spoken in Europe | 0 | - | 4.96 | 218,802 |
| European Landmarks Map Quiz | 0 | - | 4.97 | 87,181 |
| Countries of Europe with an Empty Map | 0 | - | 5.00 | 310,622 |
| All First-Level Subdivisions of Europe on a Map | 0 | - | 4.98 | 171,995 |
| Countries with Territory in the Balkans | 0 | - | 4.96 | 89,322 |
| Eastern Europe Map Quiz | 0 | - | 4.91 | 128,223 |
| Slavic Countries | 0 | - | 4.96 | 111,694 |
| Regions of France | 0 | - | 4.72 | 120,859 |
| France Immigration by Country | 0 | - | 4.70 | 76,535 |
| History of Germany | 0 | - | 4.39 | 52,826 |
| Largest Islands of Greece | 0 | - | 4.59 | 48,040 |
| Olympian Gods Quiz | 0 | - | 4.96 | 500,976 |
| Ancient Greek Words | 0 | - | 4.93 | 111,637 |
| Provinces of the Netherlands | 0 | - | 4.80 | 41,387 |
| 100 Greatest Britons Quiz | 0 | - | 4.41 | 48,277 |
| Foods in a Full English Breakfast | 0 | - | 4.46 | 103,267 |
| The UK for Americans - True or False | 0 | - | 4.43 | 58,637 |
| Anglo-Saxon Kingdoms of England | 0 | - | 4.60 | 25,753 |
| Giant Great Britain Millennium Quiz | 0 | - | 4.78 | 20,156 |
| "Big Five" European Soccer Champions Since 2000 | 0 | - | 4.97 | 356,191 |
| European Diaspora - Top 11 Countries | 0 | - | 4.90 | 95,884 |
| 10 European Countries with the Most Tourists | 0 | - | 4.98 | 137,580 |
| Three Band Flags of Europe | 0 | - | 4.98 | 193,372 |
| Pixelated Europe Map | 0 | - | 4.88 | 122,789 |
| Monarchies of Europe | 0 | - | 4.90 | 98,171 |
| European Countries with One Border | 0 | - | 4.97 | 182,818 |
| European Countries with the Fewest Borders | 0 | - | 4.97 | 179,621 |
| European Geography By Letter - B #2 | 0 | - | 4.84 | 78,659 |
| Federal Subjects of Russia | 0 | - | 4.95 | 147,396 |
| Countries Formerly in Yugoslavia | 0 | - | 4.95 | 124,928 |
| French Inventions | 0 | - | 4.08 | 13,899 |
| History of Paris | 0 | - | 4.24 | 13,653 |
| States of the Holy Roman Empire in 1356 | 0 | - | 4.98 | 74,286 |
| Embarrassing Chapters in Italian History | 0 | - | 4.24 | 12,106 |
| Roman Numeral Decoding Quiz | 0 | - | 4.94 | 437,243 |
| Two Letter Roman Numerals | 0 | - | 4.97 | 56,157 |
| UK Cities Map Quiz | 0 | - | 4.96 | 464,638 |
| Counties of England Map Quiz | 0 | - | 4.97 | 307,699 |
| Embarrassing Chapters in British History | 0 | - | 4.29 | 32,265 |
| History of Scotland | 0 | - | 4.51 | 21,095 |
| Champions League Winners | 0 | - | 4.92 | 1,007,117 |
| Countries That Border Russia | 0 | - | 4.98 | 461,833 |
| History of Austria | 0 | - | 4.70 | 17,864 |
| Austria Country Quiz | 0 | - | 4.57 | 59,755 |
| Belgium Country Quiz | 0 | - | 4.73 | 71,819 |
| France Country Quiz | 0 | - | 4.70 | 135,008 |
| Geography of the French Empire | 0 | - | 4.45 | 27,062 |
| The French Revolution | 0 | - | 4.47 | 23,943 |
| Countries Bordering France | 0 | - | 4.83 | 402,633 |
| Kings of France Quiz | 0 | - | 4.20 | 32,751 |
| History of France | 0 | - | 4.59 | 57,000 |
| Countries Bordering Germany | 0 | - | 4.99 | 369,494 |
| Greece Country Quiz | 0 | - | 4.74 | 66,280 |
| Italy Country Quiz | 0 | - | 4.80 | 123,433 |
| Luxembourg Country Quiz | 0 | - | 4.78 | 33,762 |
| Monaco Country Quiz | 0 | - | 4.47 | 41,515 |
| Netherlands Country Quiz | 0 | - | 4.53 | 80,547 |
| Nordic Cities Map Quiz | 0 | - | 4.77 | 90,474 |
| Portugal Country Quiz | 0 | - | 4.69 | 71,918 |
| The Portuguese Empire | 0 | - | 4.58 | 12,067 |
| Spain Country Quiz | 0 | - | 4.44 | 128,565 |
| Switzerland Country Quiz | 0 | - | 4.51 | 63,382 |
| United Kingdom A-Z | 0 | - | 4.52 | 88,049 |
| Largest Islands in the British Isles With a Map | 0 | - | 4.52 | 38,737 |
| British Geography Multiple Choice | 0 | - | 4.49 | 43,333 |
| 10 Closest Megacities to London | 0 | - | 4.90 | 17,708 |
| Counties of Wales | 0 | - | 4.63 | 39,311 |
| Countries of the Mongol Empire on a Map | 0 | - | 4.99 | 106,882 |
| Top 10 Coldest European Countries | 0 | - | 4.94 | 193,148 |
| Top 10 Hottest European Countries | 0 | - | 4.88 | 127,045 |
| Category Elimination - European Geography #1 | 0 | - | 4.98 | 233,356 |
| European Map without 10 Random Countries | 0 | - | 4.97 | 276,900 |
| Category Elimination - European Geography #2 | 0 | - | 4.99 | 167,179 |
| Name a Valid European Country #1 | 0 | - | 4.99 | 261,160 |
| Name a Valid European Country #2 | 0 | - | 4.94 | 114,749 |
| Russia Country Quiz | 0 | - | 4.83 | 114,514 |
| Croatia Country Quiz | 0 | - | 4.83 | 43,358 |
| Bosnia and Herzegovina Country Quiz | 0 | - | 4.86 | 35,353 |
| Figures from Greek Mythology | 0 | - | 4.91 | 187,023 |
| History of Ireland | 0 | - | 4.39 | 31,199 |
| Countries Italy Declared War On | 0 | - | 4.75 | 43,339 |
| Canary Islands | 0 | - | 4.62 | 17,482 |
| Biggest Spanish Empire Countries | 0 | - | 4.91 | 116,034 |
| Switzerland Immigration by Country | 0 | - | 4.69 | 29,722 |
| British Spellings | 0 | - | 4.06 | 99,459 |
| British Groups of Things | 0 | - | 4.25 | 82,878 |
| British Acronyms | 0 | - | 4.40 | 45,803 |
| UK Immigration by Country | 0 | - | 4.94 | 140,930 |
| United Kingdom Decoder | 0 | - | 4.29 | 40,038 |
| United Kingdom Country Quiz | 0 | - | 4.96 | 139,848 |
| Biggest Immigrant Groups by Decade in the UK | 0 | - | 4.63 | 25,216 |
| English Monarchs in Order by First Letter | 0 | - | 4.38 | 31,824 |
| Geography of Scotland | 0 | - | 4.63 | 21,622 |
| Former Dominions of the British Empire | 0 | - | 4.27 | 24,193 |
| All UEFA Champions League Teams Ever | 0 | - | 4.85 | 130,422 |
| U.S. Presidents Quiz | 0 | - | 5.00 | 3,699,747 |
| Deadliest U.S. Wars | 0 | - | 4.89 | 190,817 |
| European Countries by First 2 Letters | 0 | - | 4.95 | 529,670 |
| Countries That Touch the Adriatic Sea | 0 | - | 4.96 | 71,120 |
| European Countries with the Fewest Overnight Visitors | 0 | - | 4.80 | 41,660 |
| Top 10 European Countries by Coastline | 0 | - | 4.87 | 138,405 |
| Top 20 Football Clubs in Europe | 0 | - | 4.48 | 115,024 |
| 100 Longest Rivers in Europe - with a Map | 0 | - | 4.94 | 65,474 |
| Category Elimination - European Countries #1 | 0 | - | 4.89 | 90,089 |
| The Only Remaining European Country . . . | 0 | - | 4.41 | 64,289 |
| Countries that Border Poland | 0 | - | 4.99 | 172,307 |
| Non-Bordering Countries Closest to Russia | 0 | - | 4.91 | 82,866 |
| Countries With the Most Russian Speakers | 0 | - | 4.97 | 100,957 |
| Countries that Border Hungary | 0 | - | 4.98 | 104,244 |
| North Macedonia Country Quiz | 0 | - | 4.81 | 27,883 |
| Moldova Country Quiz | 0 | - | 4.82 | 30,817 |
| Countries Bordering Serbia | 0 | - | 4.96 | 92,421 |
| French Geography Quiz #1 | 0 | - | 4.89 | 34,781 |
| Countries Bordering Austria | 0 | - | 4.97 | 118,341 |
| 20 Questions About France | 0 | - | 4.11 | 32,414 |
| Countries that Visit France the Most | 0 | - | 4.85 | 45,880 |
| Countries Closest to Metropolitan France | 0 | - | 4.89 | 72,189 |
| Biggest Cities in Germany in 1910 | 0 | - | 4.40 | 23,487 |
| 15 Most Populous Countries that Speak a Germanic Language | 0 | - | 4.39 | 82,577 |
| Countries With the Most German Speakers | 0 | - | 4.89 | 96,794 |
| Greek Mythology General Knowledge #2 | 0 | - | 4.59 | 73,691 |
| Ancient Greece - Multiple Choice | 0 | - | 4.54 | 41,666 |
| Counties of Ireland | 0 | - | 4.92 | 195,401 |
| Countries Bordering Italy | 0 | - | 4.94 | 100,880 |
| Countries Closest to Italy | 0 | - | 4.97 | 198,083 |
| Ancient Roman Trivia #2 | 0 | - | 4.57 | 38,757 |
| Geography of the Roman Empire | 0 | - | 4.56 | 51,941 |
| Roman Names for Places | 0 | - | 4.62 | 58,307 |
