| States of Germany Map Quiz | 0 | - | 4.91 | 131,586 |
| States of Germany | 0 | - | 4.96 | 149,862 |
| Germany Immigration by Country | 0 | - | 4.84 | 79,936 |
| States of the German Confederation in 1848 | 0 | - | 4.89 | 31,493 |
| History of Germany | 0 | - | 4.39 | 52,595 |
| Germany Country Quiz | 0 | - | 4.82 | 156,433 |
| Modern Day Countries of the Spanish Empire on a Map | 0 | - | 4.95 | 85,430 |
| Counties of England | 0 | - | 4.97 | 788,543 |
| Wives of King Henry VIII | 0 | - | 4.55 | 53,157 |
| Countries the UK Declared War On | 0 | - | 4.61 | 121,718 |
| Geography of the British Empire | 0 | - | 4.48 | 39,464 |
| Ancient Greek Trivia | 0 | - | 4.62 | 66,744 |
| Geography of Ancient Greece | 0 | - | 4.69 | 31,757 |
| Medieval English History | 0 | - | 4.53 | 43,295 |
| Countries of Europe in 1815 With a Map | 0 | - | 4.99 | 148,820 |
| Countries of Europe in 1848 | 0 | - | 4.98 | 75,325 |
| Countries of Europe in 1870 with a Map | 0 | - | 4.95 | 63,274 |
| Every Country of Europe Since 1815 With a Map | 0 | - | 4.98 | 70,017 |
| Countries of Europe in 1360 with a Map | 0 | - | 4.99 | 55,933 |
| Regions of France Map Quiz | 0 | - | 4.97 | 143,028 |
| French History Multiple Choice | 0 | - | 4.55 | 32,860 |
| Countries Bordering Germany | 0 | - | 4.99 | 366,796 |
| Regions of Italy | 0 | - | 4.92 | 74,618 |
| Netherlands Immigration by Country | 0 | - | 4.94 | 43,755 |
| Regions of Spain Quiz | 0 | - | 4.90 | 112,177 |
| Cantons of Switzerland | 0 | - | 4.98 | 50,068 |
| Countries and Territories of the United Kingdom | 0 | - | 4.89 | 92,860 |
| Anglo-Saxon and Viking Kings of England | 0 | - | 4.74 | 12,080 |
| Europe Map Quiz | 0 | - | 5.00 | 4,728,444 |
| France Cities Map Quiz | 0 | - | 4.96 | 165,088 |
| Departments of France | 0 | - | 4.93 | 52,702 |
| Germany Cities Map Quiz | 0 | - | 4.87 | 125,074 |
| States of the Holy Roman Empire in 1356 | 0 | - | 4.97 | 72,368 |
| Italy Country Quiz | 0 | - | 4.82 | 122,106 |
| Regions of Italy Map Quiz | 0 | - | 4.96 | 148,273 |
| Italy Cities Map Quiz | 0 | - | 4.97 | 151,001 |
| Countries Surrounding Rome | 0 | - | 4.97 | 49,347 |
| Spain Cities Map Quiz | 0 | - | 4.87 | 95,889 |
| Regions of Spain Map Quiz | 0 | - | 4.95 | 184,547 |
| Modern-Day Countries of the British Empire in 1921 | 0 | - | 4.99 | 116,151 |
| Anglo-Saxon Kingdoms of England | 0 | - | 4.60 | 25,685 |
| Giant Great Britain Millennium Quiz | 0 | - | 4.78 | 20,068 |
| England or Wales? | 0 | - | 4.94 | 45,287 |
| Biggest Countries in Europe in 1700 | 0 | - | 4.73 | 58,105 |
| Countries With the Most German Speakers | 0 | - | 4.89 | 94,094 |
| Name the English Monarchs | 0 | - | 4.92 | 497,529 |
| Embarrassing Chapters in British History | 0 | - | 4.29 | 32,104 |
| History of Scotland | 0 | - | 4.51 | 20,992 |
| Europe by Borders in 30 Seconds | 0 | - | 4.98 | 424,937 |
| Andorra Country Quiz | 0 | - | 4.90 | 31,362 |
| Kings of France Quiz | 0 | - | 4.20 | 32,542 |
| Biggest Cities in Germany in 1910 | 0 | - | 4.41 | 23,374 |
| Countries that Beat Germany | 0 | - | 4.95 | 105,283 |
| Country Quiz on a Map - Germany | 0 | - | 4.95 | 34,412 |
| German Inventions | 0 | - | 3.91 | 30,177 |
| Embarrassing Chapters in German History | 0 | - | 3.41 | 12,565 |
| The Trojan War | 0 | - | 4.83 | 39,400 |
| Letters of the Greek Alphabet | 0 | - | 4.97 | 641,379 |
| Name that Greek Letter | 0 | - | 4.94 | 321,476 |
| Greek Mythology General Knowledge #1 | 0 | - | 4.85 | 110,403 |
| Ancient Roman Trivia #1 | 0 | - | 4.85 | 83,996 |
| Roman Emperors | 0 | - | 4.95 | 118,343 |
| Malta Country Quiz | 0 | - | 4.81 | 30,797 |
| Countries That Use the Euro | 0 | - | 4.96 | 102,794 |
| Europe Cities Map Quiz | 0 | - | 4.99 | 362,132 |
| 10 Easternmost Countries in Europe | 0 | - | 4.89 | 113,387 |
| The Only European Country ... | 0 | - | 4.91 | 213,573 |
| European Countries NOT in NATO | 0 | - | 4.87 | 59,370 |
| Olympian Gods Quiz | 0 | - | 4.96 | 495,205 |
| 101 Figures from Greek Mythology | 0 | - | 4.99 | 124,129 |
| History of The Netherlands | 0 | - | 4.46 | 17,299 |
| Former Dominions of the British Empire | 0 | - | 4.30 | 24,069 |
| Flags of Europe Quiz | 0 | - | 4.99 | 1,224,775 |
| Countries of Europe - One Minute Sprint | 0 | - | 4.94 | 1,318,807 |
| History of Russia Quiz | 0 | - | 4.49 | 31,777 |
| 15 Most Populous Countries that Speak a Germanic Language | 0 | - | 4.39 | 82,281 |
| Ancient Greek Words | 0 | - | 4.92 | 110,595 |
| History of Italy | 0 | - | 4.55 | 31,802 |
| Geography of the Dutch Empire | 0 | - | 4.62 | 34,468 |
| Countries of the Spanish Empire | 0 | - | 4.52 | 76,965 |
| Invasions of Great Britain | 0 | - | 4.51 | 59,362 |
| Oldest Cities in the United Kingdom | 0 | - | 4.39 | 23,604 |
| History of London | 0 | - | 4.33 | 26,095 |
| British History Multiple Choice #1 | 0 | - | 4.46 | 54,938 |
| British History Multiple Choice #2 | 0 | - | 4.42 | 37,817 |
| "Big Five" European Soccer Champions Since 2000 | 0 | - | 4.97 | 349,322 |
| 10 Biggest European Countries by Area | 0 | - | 4.99 | 191,615 |
| 10 Westernmost Countries in Europe | 0 | - | 4.96 | 150,219 |
| Top 10 Languages Spoken in Europe | 0 | - | 4.96 | 216,115 |
| European Landmarks Map Quiz | 0 | - | 4.97 | 86,421 |
| Countries of Europe with an Empty Map | 0 | - | 5.00 | 307,629 |
| All First-Level Subdivisions of Europe on a Map | 0 | - | 4.98 | 167,619 |
| Countries with Territory in the Balkans | 0 | - | 4.96 | 88,183 |
| Eastern Europe Map Quiz | 0 | - | 4.91 | 127,092 |
| Slavic Countries | 0 | - | 4.96 | 110,791 |
| Regions of France | 0 | - | 4.78 | 119,092 |
| France Immigration by Country | 0 | - | 4.72 | 75,927 |
| Largest Islands of Greece | 0 | - | 4.59 | 47,422 |
| Roman Numeral Decoding Quiz | 0 | - | 4.94 | 433,221 |
| Two Letter Roman Numerals | 0 | - | 4.97 | 55,569 |
| Provinces of the Netherlands | 0 | - | 4.80 | 40,741 |
| 100 Greatest Britons Quiz | 0 | - | 4.41 | 48,031 |
| UK Cities Map Quiz | 0 | - | 4.95 | 461,971 |
| Foods in a Full English Breakfast | 0 | - | 4.46 | 101,885 |
| The UK for Americans - True or False | 0 | - | 4.46 | 58,373 |
| Champions League Winners | 0 | - | 4.92 | 995,358 |
| European Geography By Letter - P #1 | 0 | - | 4.81 | 96,279 |
| European Diaspora - Top 11 Countries | 0 | - | 4.90 | 94,977 |
| 10 European Countries with the Most Tourists | 0 | - | 4.98 | 136,255 |
| Three Band Flags of Europe | 0 | - | 4.98 | 191,712 |
| Pixelated Europe Map | 0 | - | 4.88 | 121,704 |
| Monarchies of Europe | 0 | - | 4.90 | 97,239 |
| European Countries with One Border | 0 | - | 4.97 | 181,507 |
| European Countries with the Fewest Borders | 0 | - | 4.97 | 178,015 |
| European Geography By Letter - B #2 | 0 | - | 4.83 | 76,145 |
| Federal Subjects of Russia | 0 | - | 4.94 | 143,692 |
| Countries That Border Russia | 0 | - | 4.98 | 458,644 |
| Countries Formerly in Yugoslavia | 0 | - | 4.95 | 124,123 |
| History of Austria | 0 | - | 4.70 | 17,741 |
| Austria Country Quiz | 0 | - | 4.57 | 59,300 |
| Belgium Country Quiz | 0 | - | 4.70 | 71,178 |
| France Country Quiz | 0 | - | 4.70 | 133,749 |
| French Inventions | 0 | - | 4.08 | 13,859 |
| Geography of the French Empire | 0 | - | 4.48 | 26,917 |
| The French Revolution | 0 | - | 4.46 | 23,756 |
| Countries Bordering France | 0 | - | 4.85 | 397,594 |
| History of Paris | 0 | - | 4.24 | 13,612 |
| History of France | 0 | - | 4.59 | 55,919 |
| German Cities with the Most Tourists | 0 | - | 4.77 | 48,137 |
| Countries Closest to Germany A-Z | 0 | - | 4.98 | 26,909 |
| Greece Country Quiz | 0 | - | 4.74 | 65,718 |
| Figures from Greek Mythology | 0 | - | 4.91 | 184,740 |
| Embarrassing Chapters in Italian History | 0 | - | 4.24 | 12,034 |
| Luxembourg Country Quiz | 0 | - | 4.77 | 33,452 |
| Monaco Country Quiz | 0 | - | 4.47 | 41,205 |
| Netherlands Country Quiz | 0 | - | 4.50 | 79,917 |
| Nordic Cities Map Quiz | 0 | - | 4.74 | 89,727 |
| The Vikings! | 0 | - | 4.45 | 28,236 |
| Sweden Immigration by Country | 0 | - | 4.55 | 55,662 |
| Portugal Country Quiz | 0 | - | 4.69 | 71,296 |
| The Portuguese Empire | 0 | - | 4.54 | 11,984 |
| Spain Country Quiz | 0 | - | 4.45 | 127,526 |
| Switzerland Country Quiz | 0 | - | 4.51 | 62,905 |
| Counties of England Map Quiz | 0 | - | 4.97 | 305,984 |
| United Kingdom A-Z | 0 | - | 4.53 | 87,173 |
| Largest Islands in the British Isles With a Map | 0 | - | 4.52 | 38,552 |
| British Geography Multiple Choice | 0 | - | 4.49 | 43,158 |
| 10 Closest Megacities to London | 0 | - | 4.90 | 17,395 |
| Counties of Wales | 0 | - | 4.63 | 38,841 |
| Countries of the Mongol Empire on a Map | 0 | - | 4.99 | 105,746 |
| U.S. Presidents Quiz | 0 | - | 5.00 | 3,650,095 |
| Deadliest U.S. Wars | 0 | - | 4.89 | 189,158 |
| Top 10 Coldest European Countries | 0 | - | 4.94 | 192,184 |
| Top 10 Hottest European Countries | 0 | - | 4.89 | 126,052 |
| Countries That Touch the Adriatic Sea | 0 | - | 4.96 | 70,760 |
| Top 10 European Countries by Coastline | 0 | - | 4.89 | 137,789 |
| 100 Longest Rivers in Europe - with a Map | 0 | - | 4.94 | 64,760 |
| Category Elimination - European Geography #1 | 0 | - | 4.98 | 230,294 |
| European Map without 10 Random Countries | 0 | - | 4.97 | 274,024 |
| Category Elimination - European Geography #2 | 0 | - | 4.99 | 164,967 |
| Category Elimination - European Countries #1 | 0 | - | 4.89 | 88,892 |
| Name a Valid European Country #1 | 0 | - | 4.99 | 256,407 |
| Name a Valid European Country #2 | 0 | - | 4.94 | 113,080 |
| Countries that Border Poland | 0 | - | 4.99 | 171,252 |
| Russia Country Quiz | 0 | - | 4.85 | 113,584 |
| Non-Bordering Countries Closest to Russia | 0 | - | 4.91 | 82,342 |
| Countries With the Most Russian Speakers | 0 | - | 4.97 | 98,236 |
| Croatia Country Quiz | 0 | - | 4.83 | 42,803 |
| Countries that Border Hungary | 0 | - | 4.98 | 103,632 |
| Bosnia and Herzegovina Country Quiz | 0 | - | 4.86 | 35,004 |
| Countries Bordering Serbia | 0 | - | 4.96 | 91,670 |
| French Geography Quiz #1 | 0 | - | 4.89 | 34,495 |
| Countries Bordering Austria | 0 | - | 4.97 | 117,692 |
| Countries that Visit France the Most | 0 | - | 4.85 | 45,488 |
| Countries Closest to Metropolitan France | 0 | - | 4.89 | 71,765 |
| Embarrassing Chapters in French History | 0 | - | 3.67 | 20,037 |
| Most Popular Baby Girls Names in Germany | 0 | - | 4.51 | 38,614 |
| German History A-Z | 0 | - | 4.49 | 24,191 |
| Counties of Ireland | 0 | - | 4.92 | 192,861 |
| History of Ireland | 0 | - | 4.39 | 30,796 |
| Countries Bordering Italy | 0 | - | 4.94 | 100,392 |
| Countries Italy Declared War On | 0 | - | 4.75 | 42,919 |
| Countries Closest to Italy | 0 | - | 4.97 | 196,197 |
| Byzantine History | 0 | - | 4.91 | 28,594 |
| Canary Islands | 0 | - | 4.61 | 17,390 |
| Biggest Spanish Empire Countries | 0 | - | 4.91 | 114,695 |
| Countries Closest to Spain | 0 | - | 4.96 | 225,168 |
| Switzerland Immigration by Country | 0 | - | 4.70 | 29,101 |
| British Spellings | 0 | - | 4.07 | 99,192 |
| British Groups of Things | 0 | - | 4.25 | 82,659 |
| British Acronyms | 0 | - | 4.39 | 45,604 |
| UK Immigration by Country | 0 | - | 4.94 | 139,516 |
| United Kingdom Decoder | 0 | - | 4.29 | 39,942 |
| United Kingdom Country Quiz | 0 | - | 4.96 | 138,011 |
| Biggest Immigrant Groups by Decade in the UK | 0 | - | 4.62 | 24,392 |
| Counties of the UK and Ireland | 0 | - | 4.98 | 128,473 |
| Geography of Scotland | 0 | - | 4.63 | 21,468 |
| World Capitals Closest to London | 0 | - | 4.87 | 109,634 |
| 50 Busiest Air Routes from London | 0 | - | 4.86 | 95,716 |
| All UEFA Champions League Teams Ever | 0 | - | 4.84 | 128,330 |
