| States of the German Confederation in 1848 | 0 | - | 4.90 | 32,426 |
| States of Germany Map Quiz | 0 | - | 4.92 | 133,761 |
| States of Germany | 0 | - | 4.95 | 154,384 |
| Germany Immigration by Country | 0 | - | 4.86 | 81,666 |
| History of Germany | 0 | - | 4.39 | 52,968 |
| Germany Country Quiz | 0 | - | 4.82 | 158,789 |
| Modern Day Countries of the Dutch Empire on a Map | 0 | - | 4.87 | 61,631 |
| Countries of Iberia in History with a Map | 0 | - | 4.88 | 42,361 |
| Modern Day Countries of the Spanish Empire on a Map | 0 | - | 4.95 | 86,844 |
| Counties of England | 0 | - | 4.97 | 802,573 |
| Wives of King Henry VIII | 0 | - | 4.55 | 53,455 |
| Countries the UK Declared War On | 0 | - | 4.55 | 123,222 |
| Geography of the British Empire | 0 | - | 4.48 | 39,844 |
| Countries of Europe in 1815 With a Map | 0 | - | 4.99 | 151,322 |
| Countries of Europe in 1848 | 0 | - | 4.98 | 85,271 |
| Countries of Europe in 1870 with a Map | 0 | - | 4.95 | 65,708 |
| Every Country of Europe Since 1815 With a Map | 0 | - | 4.98 | 71,800 |
| Countries of Europe in 1360 with a Map | 0 | - | 4.99 | 57,530 |
| Regions of France Map Quiz | 0 | - | 4.97 | 145,591 |
| Ancient Greek Trivia | 0 | - | 4.62 | 67,222 |
| Geography of Ancient Greece | 0 | - | 4.69 | 32,037 |
| Regions of Italy | 0 | - | 4.92 | 77,009 |
| Netherlands Immigration by Country | 0 | - | 4.93 | 52,778 |
| Regions of Spain Quiz | 0 | - | 4.90 | 115,270 |
| Cantons of Switzerland | 0 | - | 4.98 | 51,731 |
| Countries and Territories of the United Kingdom | 0 | - | 4.90 | 94,496 |
| Medieval English History | 0 | - | 4.53 | 43,649 |
| Europe Map Quiz | 0 | - | 5.00 | 4,786,640 |
| French History Multiple Choice | 0 | - | 4.55 | 33,221 |
| Countries Bordering Germany | 0 | - | 4.99 | 371,738 |
| Anglo-Saxon and Viking Kings of England | 0 | - | 4.74 | 12,331 |
| Biggest Countries in Europe in 1700 | 0 | - | 4.73 | 58,739 |
| Andorra Country Quiz | 0 | - | 4.91 | 31,923 |
| France Cities Map Quiz | 0 | - | 4.96 | 167,764 |
| Departments of France | 0 | - | 4.93 | 55,107 |
| Germany Cities Map Quiz | 0 | - | 4.87 | 127,048 |
| States of the Holy Roman Empire in 1356 | 0 | - | 4.97 | 75,281 |
| Regions of Italy Map Quiz | 0 | - | 4.96 | 150,182 |
| Italy Cities Map Quiz | 0 | - | 4.97 | 153,003 |
| Countries Surrounding Rome | 0 | - | 4.97 | 49,731 |
| Spain Cities Map Quiz | 0 | - | 4.87 | 97,460 |
| Regions of Spain Map Quiz | 0 | - | 4.95 | 186,824 |
| Modern-Day Countries of the British Empire in 1921 | 0 | - | 4.99 | 118,696 |
| Name the English Monarchs | 0 | - | 4.91 | 506,201 |
| Anglo-Saxon Kingdoms of England | 0 | - | 4.60 | 25,826 |
| Giant Great Britain Millennium Quiz | 0 | - | 4.78 | 20,238 |
| England or Wales? | 0 | - | 4.94 | 45,953 |
| Europe by Borders in 30 Seconds | 0 | - | 4.98 | 430,736 |
| Biggest Cities in Germany in 1910 | 0 | - | 4.41 | 23,558 |
| Countries With the Most German Speakers | 0 | - | 4.89 | 98,532 |
| Embarrassing Chapters in British History | 0 | - | 4.30 | 32,366 |
| History of Scotland | 0 | - | 4.51 | 21,173 |
| Kings of France Quiz | 0 | - | 4.20 | 32,920 |
| Countries that Beat Germany | 0 | - | 4.94 | 107,272 |
| Country Quiz on a Map - Germany | 0 | - | 4.95 | 35,536 |
| German Inventions | 0 | - | 3.91 | 30,281 |
| Embarrassing Chapters in German History | 0 | - | 3.40 | 12,683 |
| The Trojan War | 0 | - | 4.83 | 39,972 |
| Letters of the Greek Alphabet | 0 | - | 4.97 | 651,667 |
| Name that Greek Letter | 0 | - | 4.93 | 324,910 |
| Greek Mythology General Knowledge #1 | 0 | - | 4.85 | 112,900 |
| Ancient Roman Trivia #1 | 0 | - | 4.85 | 85,572 |
| Roman Emperors | 0 | - | 4.95 | 121,145 |
| Malta Country Quiz | 0 | - | 4.81 | 31,229 |
| Top 10 Oldest African Countries | 0 | - | 4.88 | 28,216 |
| Countries That Use the Euro | 0 | - | 4.95 | 106,698 |
| Europe Cities Map Quiz | 0 | - | 4.99 | 366,151 |
| 10 Easternmost Countries in Europe | 0 | - | 4.87 | 117,031 |
| The Only European Country ... | 0 | - | 4.91 | 218,880 |
| European Countries NOT in NATO | 0 | - | 4.91 | 62,448 |
| History of Russia Quiz | 0 | - | 4.47 | 32,000 |
| 101 Figures from Greek Mythology | 0 | - | 4.99 | 127,464 |
| History of Italy | 0 | - | 4.55 | 32,141 |
| Geography of the Dutch Empire | 0 | - | 4.62 | 34,813 |
| History of The Netherlands | 0 | - | 4.46 | 17,547 |
| Countries of the Spanish Empire | 0 | - | 4.52 | 77,416 |
| Invasions of Great Britain | 0 | - | 4.51 | 60,087 |
| Former Dominions of the British Empire | 0 | - | 4.27 | 24,262 |
| British History Multiple Choice #1 | 0 | - | 4.46 | 55,308 |
| British History Multiple Choice #2 | 0 | - | 4.42 | 38,086 |
| European Countries Ending in "IA" | 0 | - | 4.96 | 68,990 |
| Flags of Europe Quiz | 0 | - | 4.99 | 1,257,191 |
| Countries of Europe - One Minute Sprint | 0 | - | 4.94 | 1,335,298 |
| 10 Biggest European Countries by Area | 0 | - | 4.99 | 193,466 |
| 10 Westernmost Countries in Europe | 0 | - | 4.96 | 152,011 |
| Top 10 Languages Spoken in Europe | 0 | - | 4.96 | 220,654 |
| European Landmarks Map Quiz | 0 | - | 4.97 | 87,741 |
| Countries of Europe with an Empty Map | 0 | - | 5.00 | 312,641 |
| All First-Level Subdivisions of Europe on a Map | 0 | - | 4.99 | 175,598 |
| Countries with Territory in the Balkans | 0 | - | 4.96 | 90,142 |
| Eastern Europe Map Quiz | 0 | - | 4.91 | 128,750 |
| Slavic Countries | 0 | - | 4.96 | 112,333 |
| 15 Most Populous Countries that Speak a Germanic Language | 0 | - | 4.40 | 82,775 |
| Olympian Gods Quiz | 0 | - | 4.96 | 503,610 |
| Ancient Greek Words | 0 | - | 4.93 | 112,422 |
| Oldest Cities in the United Kingdom | 0 | - | 4.39 | 23,824 |
| History of London | 0 | - | 4.33 | 26,271 |
| "Big Five" European Soccer Champions Since 2000 | 0 | - | 4.97 | 361,407 |
| Regions of France | 0 | - | 4.70 | 122,032 |
| France Immigration by Country | 0 | - | 4.70 | 76,913 |
| Largest Islands of Greece | 0 | - | 4.59 | 48,448 |
| Roman Numeral Decoding Quiz | 0 | - | 4.94 | 439,649 |
| Two Letter Roman Numerals | 0 | - | 4.97 | 56,492 |
| Provinces of the Netherlands | 0 | - | 4.80 | 41,736 |
| 100 Greatest Britons Quiz | 0 | - | 4.41 | 48,401 |
| UK Cities Map Quiz | 0 | - | 4.96 | 466,348 |
| Foods in a Full English Breakfast | 0 | - | 4.46 | 103,786 |
| The UK for Americans - True or False | 0 | - | 4.43 | 58,808 |
| Champions League Winners | 0 | - | 4.92 | 1,015,638 |
| European Geography By Letter - P #1 | 0 | - | 4.81 | 98,748 |
| European Diaspora - Top 11 Countries | 0 | - | 4.88 | 96,448 |
| 10 European Countries with the Most Tourists | 0 | - | 4.98 | 138,443 |
| Three Band Flags of Europe | 0 | - | 4.98 | 194,514 |
| Pixelated Europe Map | 0 | - | 4.88 | 123,444 |
| Monarchies of Europe | 0 | - | 4.90 | 98,825 |
| European Countries with One Border | 0 | - | 4.97 | 183,737 |
| European Countries with the Fewest Borders | 0 | - | 4.97 | 180,482 |
| European Geography By Letter - B #2 | 0 | - | 4.87 | 88,606 |
| Federal Subjects of Russia | 0 | - | 4.95 | 149,382 |
| Countries That Border Russia | 0 | - | 4.98 | 464,409 |
| Countries Formerly in Yugoslavia | 0 | - | 4.95 | 125,443 |
| History of Austria | 0 | - | 4.70 | 17,971 |
| Austria Country Quiz | 0 | - | 4.57 | 60,035 |
| Belgium Country Quiz | 0 | - | 4.72 | 72,233 |
| France Country Quiz | 0 | - | 4.70 | 135,615 |
| French Inventions | 0 | - | 4.10 | 13,927 |
| Geography of the French Empire | 0 | - | 4.45 | 27,214 |
| The French Revolution | 0 | - | 4.47 | 24,142 |
| Countries Bordering France | 0 | - | 4.83 | 404,786 |
| History of Paris | 0 | - | 4.24 | 13,682 |
| History of France | 0 | - | 4.61 | 57,583 |
| German Cities with the Most Tourists | 0 | - | 4.77 | 49,090 |
| Countries Closest to Germany A-Z | 0 | - | 4.98 | 27,588 |
| Greece Country Quiz | 0 | - | 4.74 | 66,626 |
| Italy Country Quiz | 0 | - | 4.77 | 124,005 |
| Embarrassing Chapters in Italian History | 0 | - | 4.24 | 12,160 |
| Luxembourg Country Quiz | 0 | - | 4.78 | 33,938 |
| Monaco Country Quiz | 0 | - | 4.48 | 41,685 |
| Netherlands Country Quiz | 0 | - | 4.52 | 80,922 |
| Nordic Cities Map Quiz | 0 | - | 4.77 | 90,724 |
| The Vikings! | 0 | - | 4.46 | 28,400 |
| Sweden Immigration by Country | 0 | - | 4.53 | 56,373 |
| Portugal Country Quiz | 0 | - | 4.69 | 72,298 |
| The Portuguese Empire | 0 | - | 4.58 | 12,102 |
| Spain Country Quiz | 0 | - | 4.44 | 129,217 |
| Switzerland Country Quiz | 0 | - | 4.52 | 63,629 |
| Counties of England Map Quiz | 0 | - | 4.97 | 308,982 |
| United Kingdom A-Z | 0 | - | 4.51 | 88,352 |
| Largest Islands in the British Isles With a Map | 0 | - | 4.52 | 38,853 |
| British Geography Multiple Choice | 0 | - | 4.49 | 43,444 |
| 10 Closest Megacities to London | 0 | - | 4.90 | 17,834 |
| Counties of Wales | 0 | - | 4.63 | 39,586 |
| Top 10 Coldest European Countries | 0 | - | 4.94 | 193,844 |
| Top 10 Hottest European Countries | 0 | - | 4.88 | 127,757 |
| Category Elimination - European Geography #1 | 0 | - | 4.98 | 235,720 |
| European Map without 10 Random Countries | 0 | - | 4.97 | 278,824 |
| Category Elimination - European Geography #2 | 0 | - | 4.99 | 168,830 |
| Name a Valid European Country #1 | 0 | - | 4.99 | 264,461 |
| Name a Valid European Country #2 | 0 | - | 4.94 | 115,836 |
| Russia Country Quiz | 0 | - | 4.83 | 115,284 |
| Croatia Country Quiz | 0 | - | 4.83 | 43,721 |
| Bosnia and Herzegovina Country Quiz | 0 | - | 4.86 | 35,569 |
| Most Popular Baby Girls Names in Germany | 0 | - | 4.51 | 38,983 |
| German History A-Z | 0 | - | 4.49 | 24,905 |
| Most-Mentioned Characters in the Iliad | 0 | - | 4.81 | 20,958 |
| Figures from Greek Mythology | 0 | - | 4.91 | 188,746 |
| History of Ireland | 0 | - | 4.39 | 31,421 |
| Countries Italy Declared War On | 0 | - | 4.75 | 43,636 |
| Byzantine History | 0 | - | 4.91 | 29,015 |
| Byzantine Emperors | 0 | - | 4.93 | 14,579 |
| Canary Islands | 0 | - | 4.62 | 17,524 |
| Biggest Spanish Empire Countries | 0 | - | 4.91 | 116,791 |
| Switzerland Immigration by Country | 0 | - | 4.69 | 30,050 |
| British Spellings | 0 | - | 4.06 | 99,592 |
| British Groups of Things | 0 | - | 4.26 | 83,005 |
| British Acronyms | 0 | - | 4.40 | 45,933 |
| UK Immigration by Country | 0 | - | 4.94 | 141,672 |
| United Kingdom Decoder | 0 | - | 4.29 | 40,101 |
| United Kingdom Country Quiz | 0 | - | 4.96 | 140,932 |
| Biggest Immigrant Groups by Decade in the UK | 0 | - | 4.63 | 25,697 |
| English Monarchs in Order by First Letter | 0 | - | 4.38 | 32,095 |
| Geography of Scotland | 0 | - | 4.63 | 21,736 |
| All UEFA Champions League Teams Ever | 0 | - | 4.85 | 132,041 |
| Countries of the Mongol Empire on a Map | 0 | - | 4.99 | 107,481 |
| U.S. Presidents Quiz | 0 | - | 5.00 | 3,724,428 |
| Deadliest U.S. Wars | 0 | - | 4.89 | 191,735 |
| Countries That Touch the Adriatic Sea | 0 | - | 4.96 | 71,337 |
| European Countries with the Fewest Overnight Visitors | 0 | - | 4.80 | 41,718 |
| Top 10 European Countries by Coastline | 0 | - | 4.88 | 138,705 |
| Top 20 Football Clubs in Europe | 0 | - | 4.48 | 121,292 |
| 100 Longest Rivers in Europe - with a Map | 0 | - | 4.94 | 65,916 |
| Category Elimination - European Countries #1 | 0 | - | 4.90 | 91,029 |
| The Only Remaining European Country . . . | 0 | - | 4.41 | 64,657 |
| Countries that Border Poland | 0 | - | 4.99 | 173,137 |
| Non-Bordering Countries Closest to Russia | 0 | - | 4.91 | 83,237 |
| Countries that Beat Russia | 0 | - | 4.81 | 83,562 |
| Countries With the Most Russian Speakers | 0 | - | 4.97 | 102,741 |
| Countries that Border Hungary | 0 | - | 4.98 | 104,988 |
| North Macedonia Country Quiz | 0 | - | 4.81 | 28,034 |
| Moldova Country Quiz | 0 | - | 4.82 | 31,021 |
