| Name the English Monarchs | 0 | - | 4.91 | 503,780 |
| Countries Bordering Germany | 0 | - | 4.99 | 370,565 |
| Germany Country Quiz | 0 | - | 4.83 | 158,140 |
| Germany Cities Map Quiz | 0 | - | 4.87 | 126,585 |
| Modern-Day Countries of the British Empire in 1921 | 0 | - | 4.99 | 117,943 |
| Countries With the Most German Speakers | 0 | - | 4.89 | 97,273 |
| Modern Day Countries of the Dutch Empire on a Map | 0 | - | 4.86 | 61,275 |
| Countries of Iberia in History with a Map | 0 | - | 4.87 | 42,040 |
| Modern Day Countries of the Spanish Empire on a Map | 0 | - | 4.95 | 86,478 |
| Flags of Europe Quiz | 0 | - | 4.99 | 1,247,974 |
| Countries that Beat Germany | 0 | - | 4.94 | 106,699 |
| The Trojan War | 0 | - | 4.83 | 39,790 |
| Greek Mythology General Knowledge #1 | 0 | - | 4.85 | 112,192 |
| Ancient Roman Trivia #1 | 0 | - | 4.85 | 84,640 |
| Roman Emperors | 0 | - | 4.95 | 120,345 |
| UK Cities Map Quiz | 0 | - | 4.96 | 465,071 |
| Medieval English History | 0 | - | 4.53 | 43,565 |
| Three Band Flags of Europe | 0 | - | 4.98 | 193,657 |
| Pixelated Europe Map | 0 | - | 4.88 | 122,964 |
| Countries of Europe in 1815 With a Map | 0 | - | 4.99 | 150,698 |
| Countries of Europe in 1848 | 0 | - | 4.98 | 83,209 |
| Countries of Europe in 1870 with a Map | 0 | - | 4.95 | 65,045 |
| Every Country of Europe Since 1815 With a Map | 0 | - | 4.98 | 71,286 |
| Countries of Europe in 1360 with a Map | 0 | - | 4.99 | 57,108 |
| Countries Bordering France | 0 | - | 4.83 | 403,451 |
| States of Germany Map Quiz | 0 | - | 4.92 | 133,118 |
| The Reign of Queen Elizabeth I | 0 | - | 4.53 | 31,838 |
| Houses of British Monarchs | 0 | - | 4.53 | 65,753 |
| British History Multiple Choice #1 | 0 | - | 4.46 | 55,200 |
| British History Multiple Choice #2 | 0 | - | 4.42 | 37,997 |
| Europe Map Quiz | 0 | - | 5.00 | 4,769,827 |
| Andorra Country Quiz | 0 | - | 4.91 | 31,757 |
| France Cities Map Quiz | 0 | - | 4.96 | 167,092 |
| States of the Holy Roman Empire in 1356 | 0 | - | 4.98 | 74,554 |
| Regions of Italy Map Quiz | 0 | - | 4.96 | 149,625 |
| Italy Cities Map Quiz | 0 | - | 4.97 | 152,281 |
| Spain Cities Map Quiz | 0 | - | 4.87 | 97,093 |
| Regions of Spain Map Quiz | 0 | - | 4.95 | 186,156 |
| Biggest Spanish Empire Countries | 0 | - | 4.91 | 116,233 |
| UK Immigration by Country | 0 | - | 4.94 | 141,131 |
| United Kingdom Country Quiz | 0 | - | 4.96 | 140,124 |
| Countries Bordering Austria | 0 | - | 4.97 | 118,641 |
| Countries that Visit France the Most | 0 | - | 4.85 | 45,955 |
| Countries Closest to Metropolitan France | 0 | - | 4.89 | 72,268 |
| Counties of Ireland | 0 | - | 4.92 | 195,941 |
| Countries Bordering Italy | 0 | - | 4.94 | 101,009 |
| Countries Closest to Italy | 0 | - | 4.97 | 198,306 |
| Countries Closest to Spain | 0 | - | 4.96 | 227,317 |
| Countries that Visit the UK the Most | 0 | - | 4.87 | 75,340 |
| Counties of the UK and Ireland | 0 | - | 4.98 | 131,211 |
| Embarrassing Chapters in British History | 0 | - | 4.29 | 32,297 |
| History of Scotland | 0 | - | 4.51 | 21,123 |
| World Capitals Closest to London | 0 | - | 4.88 | 110,781 |
| 50 Busiest Air Routes from London | 0 | - | 4.87 | 96,979 |
| Modern Day Countries of Austria-Hungary on a Map | 0 | - | 4.98 | 104,049 |
| Most Popular Baby Girls Names in Germany | 0 | - | 4.51 | 38,853 |
| Ancient Greek Trivia | 0 | - | 4.62 | 67,066 |
| Geography of Ancient Greece | 0 | - | 4.69 | 31,945 |
| Countries that Beat Italy | 0 | - | 4.85 | 54,629 |
| Countries that Beat Portugal | 0 | - | 4.86 | 59,489 |
| Countries that Beat Spain | 0 | - | 4.94 | 63,050 |
| Commonwealth of Nations Countries | 0 | - | 4.94 | 237,652 |
| English Royal Consorts | 0 | - | 4.38 | 37,404 |
| Animals in British History | 0 | - | 4.43 | 26,038 |
| Countries That Use the Euro | 0 | - | 4.95 | 105,500 |
| Europe Cities Map Quiz | 0 | - | 4.99 | 364,967 |
| 10 Easternmost Countries in Europe | 0 | - | 4.89 | 115,632 |
| The Only European Country ... | 0 | - | 4.91 | 217,313 |
| European Countries NOT in NATO | 0 | - | 4.90 | 61,520 |
| Random European Flag to Country | 0 | - | 4.89 | 182,908 |
| Biggest Trading Partners - Germany | 0 | - | 4.97 | 71,650 |
| Flags of Africa Quiz | 0 | - | 5.00 | 472,905 |
| Flags of North and South America | 0 | - | 4.99 | 374,135 |
| Countries of Europe - One Minute Sprint | 0 | - | 4.94 | 1,330,479 |
| Flags of Countries That Border France | 0 | - | 4.88 | 123,358 |
| 15 Most Populous Countries that Speak a Germanic Language | 0 | - | 4.39 | 82,632 |
| Flags of Countries that Border Germany | 0 | - | 4.86 | 97,464 |
| Greek Mythology General Knowledge #2 | 0 | - | 4.59 | 73,860 |
| Ancient Greece - Multiple Choice | 0 | - | 4.54 | 41,702 |
| Ancient Roman Trivia #2 | 0 | - | 4.57 | 38,784 |
| Geography of the Roman Empire | 0 | - | 4.56 | 51,986 |
| Roman Names for Places | 0 | - | 4.62 | 58,389 |
| Counties of England | 0 | - | 4.97 | 798,610 |
| Invasions of Great Britain | 0 | - | 4.51 | 59,947 |
| Oldest Cities in the United Kingdom | 0 | - | 4.39 | 23,735 |
| History of London | 0 | - | 4.33 | 26,216 |
| British History Quiz for Dummies | 0 | - | 4.70 | 78,732 |
| Flags of Asia Quiz | 0 | - | 4.99 | 615,591 |
| 10 Biggest European Countries by Area | 0 | - | 4.99 | 192,891 |
| 10 Westernmost Countries in Europe | 0 | - | 4.96 | 151,404 |
| Top 10 Languages Spoken in Europe | 0 | - | 4.96 | 219,298 |
| European Landmarks Map Quiz | 0 | - | 4.97 | 87,336 |
| Cross Flags of Europe | 0 | - | 4.43 | 299,324 |
| Satellite Images - Europe | 0 | - | 4.47 | 104,707 |
| European Cities by Picture #2 | 0 | - | 4.46 | 38,267 |
| Countries of Europe in 1650 with a Map | 0 | - | 4.95 | 69,586 |
| Countries with Territory in the Balkans | 0 | - | 4.96 | 89,529 |
| Eastern Europe Map Quiz | 0 | - | 4.91 | 128,370 |
| Slavic Countries | 0 | - | 4.96 | 111,858 |
| The Reign of Napoleon | 0 | - | 4.54 | 39,018 |
| Most Popular Baby Boy Names in Germany | 0 | - | 4.34 | 67,123 |
| States of the German Confederation in 1848 | 0 | - | 4.89 | 32,171 |
| The Reign of Henry VIII | 0 | - | 4.25 | 27,790 |
| Elizabeth I... or Elizabeth II? | 0 | - | 4.30 | 24,526 |
| Former Flags | 0 | - | 4.97 | 107,952 |
| Pixelated Africa Map | 0 | - | 4.98 | 100,032 |
| Flags of Oceania | 0 | - | 5.00 | 260,349 |
| European Diaspora - Top 11 Countries | 0 | - | 4.90 | 96,024 |
| 10 European Countries with the Most Tourists | 0 | - | 4.98 | 137,812 |
| Monarchies of Europe | 0 | - | 4.90 | 98,325 |
| European Countries with One Border | 0 | - | 4.97 | 183,084 |
| European Countries with the Fewest Borders | 0 | - | 4.97 | 179,864 |
| Countries That Border Russia | 0 | - | 4.98 | 462,736 |
| Countries Formerly in Yugoslavia | 0 | - | 4.95 | 125,069 |
| Austria Country Quiz | 0 | - | 4.57 | 59,828 |
| Belgium Country Quiz | 0 | - | 4.72 | 71,918 |
| France Country Quiz | 0 | - | 4.70 | 135,154 |
| Regions of France Map Quiz | 0 | - | 4.97 | 144,767 |
| Biggest French Empire Countries | 0 | - | 4.49 | 65,221 |
| Kings of France Quiz | 0 | - | 4.20 | 32,809 |
| German Cities with the Most Tourists | 0 | - | 4.77 | 48,911 |
| Countries Closest to Germany A-Z | 0 | - | 4.98 | 27,373 |
| Greece Country Quiz | 0 | - | 4.74 | 66,354 |
| The Life of Alexander the Great | 0 | - | 4.51 | 18,518 |
| Italy Country Quiz | 0 | - | 4.77 | 123,575 |
| Seven Hills of Rome | 0 | - | 4.70 | 9,202 |
| Luxembourg Country Quiz | 0 | - | 4.78 | 33,816 |
| Monaco Country Quiz | 0 | - | 4.47 | 41,559 |
| Netherlands Country Quiz | 0 | - | 4.53 | 80,634 |
| Nordic Cities Map Quiz | 0 | - | 4.77 | 90,532 |
| Portugal Country Quiz | 0 | - | 4.69 | 72,001 |
| Spain Country Quiz | 0 | - | 4.44 | 128,753 |
| Switzerland Country Quiz | 0 | - | 4.51 | 63,445 |
| Countries and Territories of the United Kingdom | 0 | - | 4.90 | 94,131 |
| Counties of England Map Quiz | 0 | - | 4.97 | 308,106 |
| Largest Islands in the British Isles With a Map | 0 | - | 4.52 | 38,764 |
| Which Country of the United Kingdom? | 0 | - | 4.58 | 39,414 |
| Name the James Bond Movies | 0 | - | 4.56 | 158,704 |
| James Bond Trivia | 0 | - | 4.46 | 39,304 |
| Wives of King Henry VIII | 0 | - | 4.55 | 53,398 |
| Countries the UK Declared War On | 0 | - | 4.55 | 122,643 |
| Geography of the British Empire | 0 | - | 4.48 | 39,733 |
| Counties of Wales | 0 | - | 4.63 | 39,373 |
| Pixelated Asia Map | 0 | - | 4.90 | 73,371 |
| Flags of Countries of the World in 1910 | 0 | - | 4.96 | 79,032 |
| Countries of the Mongol Empire on a Map | 0 | - | 4.99 | 107,063 |
| Pixelated United States Map | 0 | - | 4.88 | 94,435 |
| U.S. Presidents Quiz | 0 | - | 5.00 | 3,707,026 |
| Deadliest U.S. Wars | 0 | - | 4.89 | 191,039 |
| Flags of the Mediterranean | 0 | - | 4.94 | 148,792 |
| Top 10 Coldest European Countries | 0 | - | 4.94 | 193,281 |
| Top 10 Hottest European Countries | 0 | - | 4.88 | 127,218 |
| Countries That Touch the Adriatic Sea | 0 | - | 4.96 | 71,176 |
| Biggest Countries in Europe in 1700 | 0 | - | 4.73 | 58,565 |
| Top 10 European Countries by Coastline | 0 | - | 4.87 | 138,498 |
| Top 10 Richest Countries in Europe | 0 | - | 4.90 | 149,971 |
| Top 10 Biggest Economies in Europe | 0 | - | 4.98 | 199,759 |
| Biggest Trading Partners - European Union | 0 | - | 4.91 | 72,935 |
| Category Elimination - European Countries #1 | 0 | - | 4.89 | 90,332 |
| Name a Valid European Country #1 | 0 | - | 4.99 | 261,892 |
| Name a Valid European Country #2 | 0 | - | 4.94 | 114,997 |
| Countries that Border Poland | 0 | - | 4.99 | 172,572 |
| Russia Country Quiz | 0 | - | 4.83 | 114,673 |
| Non-Bordering Countries Closest to Russia | 0 | - | 4.91 | 82,964 |
| Countries With the Most Russian Speakers | 0 | - | 4.97 | 101,420 |
| Croatia Country Quiz | 0 | - | 4.83 | 43,455 |
| Countries that Border Hungary | 0 | - | 4.98 | 104,397 |
| Bosnia and Herzegovina Country Quiz | 0 | - | 4.86 | 35,408 |
| Countries Bordering Serbia | 0 | - | 4.96 | 92,640 |
| French Geography Quiz #1 | 0 | - | 4.89 | 34,845 |
| Departments of France | 0 | - | 4.93 | 54,412 |
| Famous Germans by Picture | 0 | - | 4.12 | 16,856 |
| Modern Day Countries of Nazi Germany on a Map | 0 | - | 4.97 | 144,922 |
| German Inventions | 0 | - | 3.91 | 30,250 |
| Embarrassing Chapters in German History | 0 | - | 3.40 | 12,648 |
| History of Ireland | 0 | - | 4.39 | 31,268 |
| Countries Italy Declared War On | 0 | - | 4.75 | 43,403 |
| Countries Surrounding Rome | 0 | - | 4.97 | 49,609 |
| Roman History by Picture | 0 | - | 4.46 | 26,493 |
| Denmark Country Quiz | 0 | - | 4.78 | 76,010 |
| Finland Country Quiz | 0 | - | 4.50 | 59,772 |
| Norway Country Quiz | 0 | - | 4.44 | 77,479 |
| Iceland Country Quiz | 0 | - | 4.69 | 43,228 |
| Countries Bordering Spain | 0 | - | 4.51 | 69,519 |
| Arthurian Legend | 0 | - | 4.33 | 25,128 |
| British Cities with the Most Tourists | 0 | - | 4.83 | 70,360 |
| Satellite Images - The United Kingdom | 0 | - | 4.40 | 28,071 |
| 100 Biggest Cities and Towns in the UK | 0 | - | 4.98 | 149,160 |
| Top 100 UK Baby Boys' Names in 1850 | 0 | - | 4.42 | 69,971 |
| Most-Visited Countries by the British | 0 | - | 4.64 | 68,747 |
| Scotland Trivia | 0 | - | 4.58 | 57,646 |
| England or Wales? | 0 | - | 4.94 | 45,784 |
| WWII Geography | 0 | - | 4.81 | 120,535 |
| Anglo-Saxon and Viking Kings of England | 0 | - | 4.74 | 12,266 |
| The Only Remaining European Country . . . | 0 | - | 4.41 | 64,389 |
| Countries that Bordered the USSR | 0 | - | 4.93 | 165,617 |
| Countries that Beat Russia | 0 | - | 4.81 | 83,036 |
| North Macedonia Country Quiz | 0 | - | 4.81 | 27,919 |
| Moldova Country Quiz | 0 | - | 4.82 | 30,875 |
| 20 Questions About France | 0 | - | 4.11 | 32,428 |
