| States of the German Confederation in 1848 | 0 | - | 4.90 | 32,488 |
| States of Germany Map Quiz | 0 | - | 4.92 | 133,915 |
| States of Germany | 0 | - | 4.95 | 154,725 |
| Germany Immigration by Country | 0 | - | 4.86 | 81,749 |
| Germany Country Quiz | 0 | - | 4.82 | 158,952 |
| Modern Day Countries of the Dutch Empire on a Map | 0 | - | 4.87 | 61,739 |
| Countries of Iberia in History with a Map | 0 | - | 4.88 | 42,457 |
| Modern Day Countries of the Spanish Empire on a Map | 0 | - | 4.95 | 86,948 |
| Counties of England | 0 | - | 4.97 | 803,619 |
| Wives of King Henry VIII | 0 | - | 4.55 | 53,478 |
| Countries the UK Declared War On | 0 | - | 4.55 | 123,321 |
| Geography of the British Empire | 0 | - | 4.48 | 39,861 |
| Countries of Europe in 1815 With a Map | 0 | - | 4.99 | 151,473 |
| Countries of Europe in 1848 | 0 | - | 4.98 | 85,761 |
| Countries of Europe in 1870 with a Map | 0 | - | 4.95 | 65,907 |
| Every Country of Europe Since 1815 With a Map | 0 | - | 4.97 | 71,945 |
| Countries of Europe in 1360 with a Map | 0 | - | 4.99 | 57,656 |
| Regions of France Map Quiz | 0 | - | 4.97 | 145,741 |
| Ancient Greek Trivia | 0 | - | 4.62 | 67,259 |
| Geography of Ancient Greece | 0 | - | 4.69 | 32,059 |
| Regions of Italy | 0 | - | 4.92 | 77,183 |
| Netherlands Immigration by Country | 0 | - | 4.93 | 52,854 |
| Regions of Spain Quiz | 0 | - | 4.90 | 115,456 |
| Cantons of Switzerland | 0 | - | 4.98 | 51,837 |
| Countries and Territories of the United Kingdom | 0 | - | 4.90 | 94,577 |
| Medieval English History | 0 | - | 4.53 | 43,671 |
| Europe Map Quiz | 0 | - | 5.00 | 4,790,798 |
| French History Multiple Choice | 0 | - | 4.55 | 33,254 |
| Countries Bordering Germany | 0 | - | 4.99 | 372,050 |
| Anglo-Saxon and Viking Kings of England | 0 | - | 4.75 | 12,353 |
| Biggest Countries in Europe in 1700 | 0 | - | 4.73 | 58,779 |
| Andorra Country Quiz | 0 | - | 4.91 | 31,969 |
| France Cities Map Quiz | 0 | - | 4.96 | 167,903 |
| Departments of France | 0 | - | 4.93 | 55,277 |
| Germany Cities Map Quiz | 0 | - | 4.87 | 127,150 |
| States of the Holy Roman Empire in 1356 | 0 | - | 4.97 | 75,500 |
| Regions of Italy Map Quiz | 0 | - | 4.96 | 150,329 |
| Italy Cities Map Quiz | 0 | - | 4.97 | 153,138 |
| Countries Surrounding Rome | 0 | - | 4.97 | 49,757 |
| Spain Cities Map Quiz | 0 | - | 4.87 | 97,550 |
| Regions of Spain Map Quiz | 0 | - | 4.95 | 186,960 |
| Modern-Day Countries of the British Empire in 1921 | 0 | - | 4.99 | 118,925 |
| Name the English Monarchs | 0 | - | 4.91 | 507,001 |
| 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 | 45,995 |
| Europe by Borders in 30 Seconds | 0 | - | 4.98 | 431,156 |
| Biggest Cities in Germany in 1910 | 0 | - | 4.41 | 23,566 |
| Countries With the Most German Speakers | 0 | - | 4.89 | 98,884 |
| Embarrassing Chapters in British History | 0 | - | 4.30 | 32,391 |
| History of Scotland | 0 | - | 4.51 | 21,181 |
| Kings of France Quiz | 0 | - | 4.21 | 32,945 |
| Countries that Beat Germany | 0 | - | 4.94 | 107,418 |
| Country Quiz on a Map - Germany | 0 | - | 4.95 | 35,602 |
| German Inventions | 0 | - | 3.91 | 30,288 |
| Embarrassing Chapters in German History | 0 | - | 3.40 | 12,690 |
| The Trojan War | 0 | - | 4.83 | 40,023 |
| Letters of the Greek Alphabet | 0 | - | 4.97 | 652,438 |
| Name that Greek Letter | 0 | - | 4.93 | 325,131 |
| Greek Mythology General Knowledge #1 | 0 | - | 4.85 | 113,077 |
| Ancient Roman Trivia #1 | 0 | - | 4.85 | 85,644 |
| Roman Emperors | 0 | - | 4.95 | 121,325 |
| Malta Country Quiz | 0 | - | 4.81 | 31,247 |
| Top 10 Oldest African Countries | 0 | - | 4.88 | 28,276 |
| Countries That Use the Euro | 0 | - | 4.95 | 107,042 |
| Europe Cities Map Quiz | 0 | - | 4.99 | 366,420 |
| 10 Easternmost Countries in Europe | 0 | - | 4.87 | 117,341 |
| The Only European Country ... | 0 | - | 4.91 | 219,332 |
| European Countries NOT in NATO | 0 | - | 4.91 | 62,696 |
| History of Russia Quiz | 0 | - | 4.47 | 32,011 |
| 101 Figures from Greek Mythology | 0 | - | 4.99 | 127,716 |
| History of Italy | 0 | - | 4.55 | 32,166 |
| Geography of the Dutch Empire | 0 | - | 4.62 | 34,835 |
| History of The Netherlands | 0 | - | 4.46 | 17,564 |
| Countries of the Spanish Empire | 0 | - | 4.52 | 77,450 |
| 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 | 38,100 |
| European Countries Ending in "IA" | 0 | - | 4.96 | 69,130 |
| Flags of Europe Quiz | 0 | - | 4.99 | 1,259,844 |
| Countries of Europe - One Minute Sprint | 0 | - | 4.94 | 1,336,558 |
| 10 Biggest European Countries by Area | 0 | - | 4.99 | 193,682 |
| 10 Westernmost Countries in Europe | 0 | - | 4.96 | 152,310 |
| Top 10 Languages Spoken in Europe | 0 | - | 4.96 | 221,053 |
| European Landmarks Map Quiz | 0 | - | 4.97 | 87,858 |
| Countries of Europe with an Empty Map | 0 | - | 5.00 | 312,981 |
| All First-Level Subdivisions of Europe on a Map | 0 | - | 4.99 | 176,187 |
| Countries with Territory in the Balkans | 0 | - | 4.96 | 90,281 |
| Eastern Europe Map Quiz | 0 | - | 4.91 | 128,835 |
| Slavic Countries | 0 | - | 4.96 | 112,447 |
| 15 Most Populous Countries that Speak a Germanic Language | 0 | - | 4.40 | 82,809 |
| Olympian Gods Quiz | 0 | - | 4.96 | 504,085 |
| Ancient Greek Words | 0 | - | 4.93 | 112,570 |
| Oldest Cities in the United Kingdom | 0 | - | 4.39 | 23,836 |
| History of London | 0 | - | 4.33 | 26,279 |
| "Big Five" European Soccer Champions Since 2000 | 0 | - | 4.97 | 362,192 |
| Regions of France | 0 | - | 4.70 | 122,247 |
| France Immigration by Country | 0 | - | 4.70 | 76,972 |
| Largest Islands of Greece | 0 | - | 4.59 | 48,535 |
| Roman Numeral Decoding Quiz | 0 | - | 4.94 | 440,091 |
| Two Letter Roman Numerals | 0 | - | 4.97 | 56,562 |
| Provinces of the Netherlands | 0 | - | 4.80 | 41,853 |
| 100 Greatest Britons Quiz | 0 | - | 4.41 | 48,424 |
| UK Cities Map Quiz | 0 | - | 4.96 | 466,636 |
| Foods in a Full English Breakfast | 0 | - | 4.46 | 103,891 |
| The UK for Americans - True or False | 0 | - | 4.43 | 58,830 |
| Champions League Winners | 0 | - | 4.92 | 1,017,107 |
| European Geography By Letter - P #1 | 0 | - | 4.81 | 99,051 |
| European Diaspora - Top 11 Countries | 0 | - | 4.88 | 96,920 |
| 10 European Countries with the Most Tourists | 0 | - | 4.98 | 138,643 |
| Three Band Flags of Europe | 0 | - | 4.98 | 194,718 |
| Pixelated Europe Map | 0 | - | 4.88 | 123,554 |
| Monarchies of Europe | 0 | - | 4.90 | 98,964 |
| European Countries with One Border | 0 | - | 4.97 | 183,932 |
| European Countries with the Fewest Borders | 0 | - | 4.97 | 180,643 |
| European Geography By Letter - B #2 | 0 | - | 4.87 | 88,993 |
| Federal Subjects of Russia | 0 | - | 4.95 | 149,738 |
| Countries That Border Russia | 0 | - | 4.98 | 464,695 |
| Countries Formerly in Yugoslavia | 0 | - | 4.95 | 125,524 |
| History of Austria | 0 | - | 4.70 | 17,983 |
| Austria Country Quiz | 0 | - | 4.57 | 60,088 |
| Belgium Country Quiz | 0 | - | 4.72 | 72,307 |
| France Country Quiz | 0 | - | 4.70 | 135,734 |
| French Inventions | 0 | - | 4.10 | 13,930 |
| Geography of the French Empire | 0 | - | 4.45 | 27,223 |
| The French Revolution | 0 | - | 4.47 | 24,155 |
| Countries Bordering France | 0 | - | 4.83 | 405,134 |
| History of Paris | 0 | - | 4.24 | 13,683 |
| History of France | 0 | - | 4.61 | 57,678 |
| German Cities with the Most Tourists | 0 | - | 4.77 | 49,147 |
| Countries Closest to Germany A-Z | 0 | - | 4.98 | 27,641 |
| Greece Country Quiz | 0 | - | 4.74 | 66,671 |
| Italy Country Quiz | 0 | - | 4.77 | 124,129 |
| Embarrassing Chapters in Italian History | 0 | - | 4.24 | 12,170 |
| Luxembourg Country Quiz | 0 | - | 4.78 | 33,967 |
| Monaco Country Quiz | 0 | - | 4.48 | 41,708 |
| Netherlands Country Quiz | 0 | - | 4.52 | 80,989 |
| Nordic Cities Map Quiz | 0 | - | 4.77 | 90,769 |
| The Vikings! | 0 | - | 4.46 | 28,417 |
| Sweden Immigration by Country | 0 | - | 4.53 | 56,410 |
| Portugal Country Quiz | 0 | - | 4.69 | 72,366 |
| The Portuguese Empire | 0 | - | 4.58 | 12,116 |
| Spain Country Quiz | 0 | - | 4.44 | 129,324 |
| Switzerland Country Quiz | 0 | - | 4.52 | 63,677 |
| Counties of England Map Quiz | 0 | - | 4.97 | 309,156 |
| United Kingdom A-Z | 0 | - | 4.51 | 88,405 |
| Largest Islands in the British Isles With a Map | 0 | - | 4.52 | 38,873 |
| British Geography Multiple Choice | 0 | - | 4.49 | 43,471 |
| 10 Closest Megacities to London | 0 | - | 4.90 | 17,848 |
| Counties of Wales | 0 | - | 4.63 | 39,657 |
| Top 10 Coldest European Countries | 0 | - | 4.94 | 193,996 |
| Top 10 Hottest European Countries | 0 | - | 4.88 | 127,884 |
| Category Elimination - European Geography #1 | 0 | - | 4.98 | 236,104 |
| European Map without 10 Random Countries | 0 | - | 4.97 | 279,119 |
| Category Elimination - European Geography #2 | 0 | - | 4.99 | 169,092 |
| Name a Valid European Country #1 | 0 | - | 4.99 | 265,005 |
| Name a Valid European Country #2 | 0 | - | 4.94 | 116,012 |
| Russia Country Quiz | 0 | - | 4.83 | 115,381 |
| Croatia Country Quiz | 0 | - | 4.83 | 43,796 |
| Bosnia and Herzegovina Country Quiz | 0 | - | 4.83 | 35,612 |
| Most Popular Baby Girls Names in Germany | 0 | - | 4.51 | 39,011 |
| German History A-Z | 0 | - | 4.49 | 24,929 |
| Most-Mentioned Characters in the Iliad | 0 | - | 4.81 | 20,991 |
| Figures from Greek Mythology | 0 | - | 4.91 | 189,031 |
| History of Ireland | 0 | - | 4.39 | 31,458 |
| Countries Italy Declared War On | 0 | - | 4.74 | 47,186 |
| Byzantine History | 0 | - | 4.91 | 29,033 |
| Byzantine Emperors | 0 | - | 4.93 | 14,632 |
| Canary Islands | 0 | - | 4.62 | 17,545 |
| Biggest Spanish Empire Countries | 0 | - | 4.91 | 117,018 |
| Switzerland Immigration by Country | 0 | - | 4.69 | 30,108 |
| British Spellings | 0 | - | 4.06 | 99,618 |
| British Groups of Things | 0 | - | 4.26 | 83,032 |
| British Acronyms | 0 | - | 4.40 | 45,954 |
| UK Immigration by Country | 0 | - | 4.94 | 141,819 |
| United Kingdom Decoder | 0 | - | 4.29 | 40,122 |
| United Kingdom Country Quiz | 0 | - | 4.96 | 141,146 |
| Biggest Immigrant Groups by Decade in the UK | 0 | - | 4.63 | 25,794 |
| English Monarchs in Order by First Letter | 0 | - | 4.38 | 32,176 |
| Geography of Scotland | 0 | - | 4.63 | 21,755 |
| All UEFA Champions League Teams Ever | 0 | - | 4.85 | 132,318 |
| Countries of the Mongol Empire on a Map | 0 | - | 4.99 | 107,630 |
| U.S. Presidents Quiz | 0 | - | 5.00 | 3,728,492 |
| Deadliest U.S. Wars | 0 | - | 4.89 | 191,883 |
| Countries That Touch the Adriatic Sea | 0 | - | 4.96 | 71,385 |
| European Countries with the Fewest Overnight Visitors | 0 | - | 4.80 | 41,725 |
| Top 10 European Countries by Coastline | 0 | - | 4.86 | 138,781 |
| Top 20 Football Clubs in Europe | 0 | - | 4.48 | 123,173 |
| 100 Longest Rivers in Europe - with a Map | 0 | - | 4.94 | 66,000 |
| Category Elimination - European Countries #1 | 0 | - | 4.90 | 91,178 |
| Random Point on Land to European Country | 0 | - | 4.94 | 78,141 |
| The Only Remaining European Country . . . | 0 | - | 4.41 | 64,726 |
| Countries that Border Poland | 0 | - | 4.99 | 173,266 |
| Non-Bordering Countries Closest to Russia | 0 | - | 4.91 | 83,316 |
| Countries that Beat Russia | 0 | - | 4.81 | 83,682 |
| Countries With the Most Russian Speakers | 0 | - | 4.97 | 103,062 |
| Countries that Border Hungary | 0 | - | 4.98 | 105,048 |
| North Macedonia Country Quiz | 0 | - | 4.81 | 28,072 |
| Moldova Country Quiz | 0 | - | 4.82 | 31,045 |
