| States of the German Confederation in 1848 | 0 | - | 4.89 | 31,926 |
| States of Germany Map Quiz | 0 | - | 4.91 | 132,676 |
| States of Germany | 0 | - | 4.96 | 152,163 |
| Germany Immigration by Country | 0 | - | 4.85 | 80,946 |
| History of Germany | 0 | - | 4.39 | 52,793 |
| Germany Country Quiz | 0 | - | 4.82 | 157,697 |
| Modern Day Countries of the Dutch Empire on a Map | 0 | - | 4.86 | 61,008 |
| Modern Day Countries of the Spanish Empire on a Map | 0 | - | 4.95 | 86,172 |
| Counties of England | 0 | - | 4.97 | 795,525 |
| Wives of King Henry VIII | 0 | - | 4.55 | 53,318 |
| Countries the UK Declared War On | 0 | - | 4.61 | 122,376 |
| Geography of the British Empire | 0 | - | 4.48 | 39,643 |
| Ancient Greek Trivia | 0 | - | 4.62 | 66,959 |
| Geography of Ancient Greece | 0 | - | 4.69 | 31,890 |
| Medieval English History | 0 | - | 4.53 | 43,485 |
| Countries of Europe in 1815 With a Map | 0 | - | 4.99 | 150,016 |
| Countries of Europe in 1848 | 0 | - | 4.99 | 79,808 |
| Countries of Europe in 1870 with a Map | 0 | - | 4.95 | 64,444 |
| Every Country of Europe Since 1815 With a Map | 0 | - | 4.98 | 70,821 |
| Countries of Europe in 1360 with a Map | 0 | - | 4.99 | 56,725 |
| Regions of France Map Quiz | 0 | - | 4.97 | 144,262 |
| French History Multiple Choice | 0 | - | 4.55 | 33,013 |
| Countries Bordering Germany | 0 | - | 4.99 | 368,826 |
| Regions of Italy | 0 | - | 4.92 | 75,705 |
| Netherlands Immigration by Country | 0 | - | 4.93 | 52,014 |
| Regions of Spain Quiz | 0 | - | 4.90 | 113,766 |
| Cantons of Switzerland | 0 | - | 4.98 | 51,101 |
| Countries and Territories of the United Kingdom | 0 | - | 4.89 | 93,912 |
| Anglo-Saxon and Viking Kings of England | 0 | - | 4.74 | 12,195 |
| Europe Map Quiz | 0 | - | 5.00 | 4,758,442 |
| Andorra Country Quiz | 0 | - | 4.90 | 31,646 |
| France Cities Map Quiz | 0 | - | 4.96 | 166,574 |
| Departments of France | 0 | - | 4.93 | 53,954 |
| Germany Cities Map Quiz | 0 | - | 4.87 | 125,987 |
| States of the Holy Roman Empire in 1356 | 0 | - | 4.97 | 73,847 |
| Italy Country Quiz | 0 | - | 4.82 | 123,288 |
| Regions of Italy Map Quiz | 0 | - | 4.96 | 149,207 |
| Italy Cities Map Quiz | 0 | - | 4.97 | 151,883 |
| Countries Surrounding Rome | 0 | - | 4.97 | 49,529 |
| Spain Cities Map Quiz | 0 | - | 4.87 | 96,793 |
| Regions of Spain Map Quiz | 0 | - | 4.95 | 185,492 |
| Modern-Day Countries of the British Empire in 1921 | 0 | - | 4.99 | 117,386 |
| Anglo-Saxon Kingdoms of England | 0 | - | 4.60 | 25,744 |
| Giant Great Britain Millennium Quiz | 0 | - | 4.78 | 20,139 |
| England or Wales? | 0 | - | 4.94 | 45,634 |
| Biggest Countries in Europe in 1700 | 0 | - | 4.73 | 58,439 |
| Countries With the Most German Speakers | 0 | - | 4.89 | 96,350 |
| Name the English Monarchs | 0 | - | 4.91 | 501,953 |
| Embarrassing Chapters in British History | 0 | - | 4.29 | 32,236 |
| History of Scotland | 0 | - | 4.51 | 21,083 |
| Europe by Borders in 30 Seconds | 0 | - | 4.98 | 427,812 |
| Kings of France Quiz | 0 | - | 4.20 | 32,698 |
| Countries that Beat Germany | 0 | - | 4.95 | 106,206 |
| Country Quiz on a Map - Germany | 0 | - | 4.95 | 34,963 |
| German Inventions | 0 | - | 3.91 | 30,230 |
| Embarrassing Chapters in German History | 0 | - | 3.40 | 12,620 |
| The Trojan War | 0 | - | 4.83 | 39,674 |
| Letters of the Greek Alphabet | 0 | - | 4.97 | 646,617 |
| Name that Greek Letter | 0 | - | 4.93 | 323,248 |
| Greek Mythology General Knowledge #1 | 0 | - | 4.85 | 111,656 |
| Ancient Roman Trivia #1 | 0 | - | 4.85 | 84,464 |
| Roman Emperors | 0 | - | 4.95 | 119,779 |
| Malta Country Quiz | 0 | - | 4.81 | 31,023 |
| Countries That Use the Euro | 0 | - | 4.95 | 104,730 |
| Europe Cities Map Quiz | 0 | - | 4.99 | 364,181 |
| 10 Easternmost Countries in Europe | 0 | - | 4.89 | 114,993 |
| The Only European Country ... | 0 | - | 4.91 | 216,253 |
| European Countries NOT in NATO | 0 | - | 4.90 | 60,922 |
| Olympian Gods Quiz | 0 | - | 4.96 | 500,223 |
| 101 Figures from Greek Mythology | 0 | - | 4.99 | 125,714 |
| History of The Netherlands | 0 | - | 4.46 | 17,422 |
| Former Dominions of the British Empire | 0 | - | 4.27 | 24,173 |
| Flags of Europe Quiz | 0 | - | 4.99 | 1,241,695 |
| Countries of Europe - One Minute Sprint | 0 | - | 4.94 | 1,327,097 |
| History of Russia Quiz | 0 | - | 4.47 | 31,899 |
| 15 Most Populous Countries that Speak a Germanic Language | 0 | - | 4.39 | 82,523 |
| Ancient Greek Words | 0 | - | 4.93 | 111,450 |
| History of Italy | 0 | - | 4.55 | 31,955 |
| Geography of the Dutch Empire | 0 | - | 4.61 | 34,636 |
| Countries of the Spanish Empire | 0 | - | 4.52 | 77,196 |
| Invasions of Great Britain | 0 | - | 4.51 | 59,824 |
| Oldest Cities in the United Kingdom | 0 | - | 4.39 | 23,702 |
| History of London | 0 | - | 4.33 | 26,180 |
| British History Multiple Choice #1 | 0 | - | 4.46 | 55,119 |
| British History Multiple Choice #2 | 0 | - | 4.42 | 37,931 |
| "Big Five" European Soccer Champions Since 2000 | 0 | - | 4.97 | 355,114 |
| 10 Biggest European Countries by Area | 0 | - | 4.99 | 192,531 |
| 10 Westernmost Countries in Europe | 0 | - | 4.96 | 151,068 |
| Top 10 Languages Spoken in Europe | 0 | - | 4.96 | 218,384 |
| European Landmarks Map Quiz | 0 | - | 4.97 | 87,048 |
| Countries of Europe with an Empty Map | 0 | - | 5.00 | 310,167 |
| All First-Level Subdivisions of Europe on a Map | 0 | - | 4.99 | 171,023 |
| Countries with Territory in the Balkans | 0 | - | 4.96 | 89,119 |
| Eastern Europe Map Quiz | 0 | - | 4.91 | 127,916 |
| Slavic Countries | 0 | - | 4.96 | 111,556 |
| Regions of France | 0 | - | 4.75 | 120,568 |
| France Immigration by Country | 0 | - | 4.70 | 76,450 |
| Biggest Cities in Germany in 1910 | 0 | - | 4.40 | 23,467 |
| Largest Islands of Greece | 0 | - | 4.59 | 47,934 |
| Roman Numeral Decoding Quiz | 0 | - | 4.94 | 436,619 |
| Two Letter Roman Numerals | 0 | - | 4.97 | 56,051 |
| Provinces of the Netherlands | 0 | - | 4.80 | 41,293 |
| 100 Greatest Britons Quiz | 0 | - | 4.41 | 48,244 |
| UK Cities Map Quiz | 0 | - | 4.96 | 464,197 |
| Foods in a Full English Breakfast | 0 | - | 4.46 | 103,142 |
| The UK for Americans - True or False | 0 | - | 4.43 | 58,603 |
| Champions League Winners | 0 | - | 4.92 | 1,005,266 |
| European Diaspora - Top 11 Countries | 0 | - | 4.90 | 95,739 |
| 10 European Countries with the Most Tourists | 0 | - | 4.98 | 137,364 |
| Three Band Flags of Europe | 0 | - | 4.98 | 193,085 |
| Pixelated Europe Map | 0 | - | 4.88 | 122,614 |
| Monarchies of Europe | 0 | - | 4.90 | 98,022 |
| European Countries with One Border | 0 | - | 4.97 | 182,613 |
| European Countries with the Fewest Borders | 0 | - | 4.97 | 179,428 |
| European Geography By Letter - B #2 | 0 | - | 4.84 | 78,094 |
| Federal Subjects of Russia | 0 | - | 4.95 | 146,705 |
| Countries That Border Russia | 0 | - | 4.98 | 461,371 |
| Countries Formerly in Yugoslavia | 0 | - | 4.95 | 124,798 |
| History of Austria | 0 | - | 4.70 | 17,849 |
| Austria Country Quiz | 0 | - | 4.57 | 59,684 |
| Belgium Country Quiz | 0 | - | 4.70 | 71,727 |
| France Country Quiz | 0 | - | 4.70 | 134,864 |
| French Inventions | 0 | - | 4.08 | 13,892 |
| Geography of the French Empire | 0 | - | 4.45 | 27,040 |
| The French Revolution | 0 | - | 4.46 | 23,919 |
| Countries Bordering France | 0 | - | 4.83 | 402,146 |
| History of Paris | 0 | - | 4.24 | 13,643 |
| History of France | 0 | - | 4.59 | 56,908 |
| German Cities with the Most Tourists | 0 | - | 4.77 | 48,769 |
| Countries Closest to Germany A-Z | 0 | - | 4.98 | 27,256 |
| Greece Country Quiz | 0 | - | 4.74 | 66,187 |
| Figures from Greek Mythology | 0 | - | 4.91 | 186,627 |
| Embarrassing Chapters in Italian History | 0 | - | 4.24 | 12,091 |
| Luxembourg Country Quiz | 0 | - | 4.78 | 33,718 |
| Monaco Country Quiz | 0 | - | 4.47 | 41,464 |
| Netherlands Country Quiz | 0 | - | 4.53 | 80,456 |
| Nordic Cities Map Quiz | 0 | - | 4.77 | 90,417 |
| The Vikings! | 0 | - | 4.46 | 28,333 |
| Sweden Immigration by Country | 0 | - | 4.55 | 56,080 |
| Portugal Country Quiz | 0 | - | 4.69 | 71,806 |
| The Portuguese Empire | 0 | - | 4.58 | 12,056 |
| Spain Country Quiz | 0 | - | 4.45 | 128,416 |
| Switzerland Country Quiz | 0 | - | 4.51 | 63,311 |
| Counties of England Map Quiz | 0 | - | 4.97 | 307,152 |
| United Kingdom A-Z | 0 | - | 4.51 | 87,613 |
| Largest Islands in the British Isles With a Map | 0 | - | 4.52 | 38,695 |
| British Geography Multiple Choice | 0 | - | 4.49 | 43,302 |
| 10 Closest Megacities to London | 0 | - | 4.90 | 17,679 |
| Counties of Wales | 0 | - | 4.63 | 39,241 |
| Countries of the Mongol Empire on a Map | 0 | - | 4.99 | 106,709 |
| U.S. Presidents Quiz | 0 | - | 5.00 | 3,692,101 |
| Deadliest U.S. Wars | 0 | - | 4.89 | 190,633 |
| Top 10 Coldest European Countries | 0 | - | 4.94 | 193,016 |
| Top 10 Hottest European Countries | 0 | - | 4.88 | 126,874 |
| Countries That Touch the Adriatic Sea | 0 | - | 4.96 | 71,075 |
| Top 10 European Countries by Coastline | 0 | - | 4.87 | 138,322 |
| 100 Longest Rivers in Europe - with a Map | 0 | - | 4.94 | 65,388 |
| Category Elimination - European Geography #1 | 0 | - | 4.98 | 232,880 |
| European Map without 10 Random Countries | 0 | - | 4.97 | 276,496 |
| Category Elimination - European Geography #2 | 0 | - | 4.99 | 166,877 |
| Category Elimination - European Countries #1 | 0 | - | 4.89 | 89,912 |
| Name a Valid European Country #1 | 0 | - | 4.99 | 260,417 |
| Name a Valid European Country #2 | 0 | - | 4.94 | 114,497 |
| Countries that Border Poland | 0 | - | 4.99 | 172,147 |
| Russia Country Quiz | 0 | - | 4.85 | 114,364 |
| Non-Bordering Countries Closest to Russia | 0 | - | 4.91 | 82,775 |
| Countries With the Most Russian Speakers | 0 | - | 4.97 | 100,494 |
| Croatia Country Quiz | 0 | - | 4.83 | 43,283 |
| Countries that Border Hungary | 0 | - | 4.98 | 104,142 |
| Bosnia and Herzegovina Country Quiz | 0 | - | 4.86 | 35,315 |
| Countries Bordering Serbia | 0 | - | 4.96 | 92,320 |
| French Geography Quiz #1 | 0 | - | 4.89 | 34,745 |
| Countries Bordering Austria | 0 | - | 4.97 | 118,233 |
| Countries that Visit France the Most | 0 | - | 4.85 | 45,818 |
| Countries Closest to Metropolitan France | 0 | - | 4.89 | 72,125 |
| Embarrassing Chapters in French History | 0 | - | 3.65 | 20,095 |
| Most Popular Baby Girls Names in Germany | 0 | - | 4.51 | 38,769 |
| German History A-Z | 0 | - | 4.49 | 24,589 |
| Counties of Ireland | 0 | - | 4.92 | 194,923 |
| History of Ireland | 0 | - | 4.39 | 31,138 |
| Countries Bordering Italy | 0 | - | 4.94 | 100,799 |
| Countries Italy Declared War On | 0 | - | 4.75 | 43,281 |
| Countries Closest to Italy | 0 | - | 4.97 | 197,869 |
| Byzantine History | 0 | - | 4.91 | 28,775 |
| Canary Islands | 0 | - | 4.62 | 17,470 |
| Biggest Spanish Empire Countries | 0 | - | 4.91 | 115,835 |
| Countries Closest to Spain | 0 | - | 4.96 | 226,789 |
| Switzerland Immigration by Country | 0 | - | 4.70 | 29,644 |
| British Spellings | 0 | - | 4.06 | 99,423 |
| British Groups of Things | 0 | - | 4.25 | 82,850 |
| British Acronyms | 0 | - | 4.40 | 45,777 |
| UK Immigration by Country | 0 | - | 4.94 | 140,773 |
| United Kingdom Decoder | 0 | - | 4.29 | 40,027 |
| United Kingdom Country Quiz | 0 | - | 4.96 | 139,601 |
| Biggest Immigrant Groups by Decade in the UK | 0 | - | 4.63 | 25,098 |
| English Monarchs in Order by First Letter | 0 | - | 4.38 | 31,723 |
| Counties of the UK and Ireland | 0 | - | 4.98 | 130,408 |
| Geography of Scotland | 0 | - | 4.63 | 21,604 |
| World Capitals Closest to London | 0 | - | 4.87 | 110,584 |
| 50 Busiest Air Routes from London | 0 | - | 4.87 | 96,756 |
