| Name the English Monarchs | 0 | - | 4.91 | 502,672 |
| States of the German Confederation in 1848 | 0 | - | 4.89 | 32,010 |
| Letters of the Greek Alphabet | 0 | - | 4.97 | 647,449 |
| Name that Greek Letter | 0 | - | 4.93 | 323,456 |
| The Trojan War | 0 | - | 4.83 | 39,728 |
| Greek Mythology General Knowledge #1 | 0 | - | 4.85 | 111,850 |
| Ancient Roman Trivia #1 | 0 | - | 4.85 | 84,535 |
| Roman Emperors | 0 | - | 4.95 | 120,051 |
| Countries Bordering Germany | 0 | - | 4.99 | 369,417 |
| 101 Figures from Greek Mythology | 0 | - | 4.99 | 125,988 |
| Countries With the Most German Speakers | 0 | - | 4.89 | 96,707 |
| States of the Holy Roman Empire in 1356 | 0 | - | 4.98 | 74,190 |
| Countries that Beat Germany | 0 | - | 4.94 | 106,437 |
| Country Quiz on a Map - Germany | 0 | - | 4.95 | 35,038 |
| German History A-Z | 0 | - | 4.49 | 24,607 |
| Countries of Europe in 1815 With a Map | 0 | - | 4.99 | 150,337 |
| Countries of Europe in 1848 | 0 | - | 4.99 | 81,859 |
| Countries of Europe in 1870 with a Map | 0 | - | 4.95 | 64,680 |
| Every Country of Europe Since 1815 With a Map | 0 | - | 4.98 | 71,013 |
| Countries of Europe in 1360 with a Map | 0 | - | 4.99 | 56,890 |
| States of Germany Map Quiz | 0 | - | 4.91 | 132,822 |
| States of Germany | 0 | - | 4.96 | 152,590 |
| Germany Immigration by Country | 0 | - | 4.85 | 81,040 |
| Countries Bordering France | 0 | - | 4.83 | 402,553 |
| Germany Country Quiz | 0 | - | 4.83 | 157,854 |
| Greek Mythology General Knowledge #2 | 0 | - | 4.59 | 73,668 |
| Ancient Greece - Multiple Choice | 0 | - | 4.54 | 41,660 |
| Ancient Roman Trivia #2 | 0 | - | 4.57 | 38,747 |
| Geography of the Roman Empire | 0 | - | 4.56 | 51,932 |
| Roman Names for Places | 0 | - | 4.62 | 58,288 |
| The Reign of Queen Elizabeth I | 0 | - | 4.53 | 31,793 |
| Houses of British Monarchs | 0 | - | 4.53 | 65,671 |
| Europe Map Quiz | 0 | - | 5.00 | 4,763,118 |
| Biggest Countries in Europe in 1700 | 0 | - | 4.73 | 58,492 |
| French Geography Quiz #1 | 0 | - | 4.89 | 34,769 |
| Countries Bordering Austria | 0 | - | 4.97 | 118,321 |
| Countries that Visit France the Most | 0 | - | 4.85 | 45,872 |
| Countries Closest to Metropolitan France | 0 | - | 4.89 | 72,180 |
| The Reign of Napoleon | 0 | - | 4.54 | 38,956 |
| Counties of Ireland | 0 | - | 4.92 | 195,283 |
| Countries Bordering Italy | 0 | - | 4.94 | 100,867 |
| Countries Closest to Italy | 0 | - | 4.97 | 198,048 |
| Countries Closest to Spain | 0 | - | 4.96 | 226,994 |
| Counties of the UK and Ireland | 0 | - | 4.98 | 130,735 |
| British History A-Z #1 | 0 | - | 4.45 | 46,483 |
| English First Names of the Middle Ages | 0 | - | 4.47 | 60,675 |
| British History Quiz for Dummies | 0 | - | 4.70 | 78,603 |
| World Capitals Closest to London | 0 | - | 4.88 | 110,655 |
| 50 Busiest Air Routes from London | 0 | - | 4.87 | 96,842 |
| Europe by Borders in 30 Seconds | 0 | - | 4.98 | 428,213 |
| Country Quiz on a Map - France | 0 | - | 4.98 | 47,205 |
| The Life of Alexander the Great | 0 | - | 4.51 | 18,501 |
| Countries that Beat Italy | 0 | - | 4.85 | 54,492 |
| Seven Hills of Rome | 0 | - | 4.70 | 9,183 |
| Countries Closest to Iceland | 0 | - | 4.90 | 73,581 |
| Countries that Beat Portugal | 0 | - | 4.86 | 59,344 |
| Countries that Beat Spain | 0 | - | 4.94 | 62,942 |
| The United States... or the United Kingdom? | 0 | - | 4.87 | 98,538 |
| Commonwealth of Nations Countries | 0 | - | 4.94 | 237,410 |
| English Royal Consorts | 0 | - | 4.38 | 37,353 |
| 2025–2026 Football League Teams | 0 | - | 4.94 | 401,417 |
| Europe Cities Map Quiz | 0 | - | 4.99 | 364,475 |
| Most Popular Baby Girls Names in Germany | 0 | - | 4.51 | 38,798 |
| Olympian Gods Quiz | 0 | - | 4.96 | 500,848 |
| Countries Italy Declared War On | 0 | - | 4.75 | 43,331 |
| The Life of Julius Caesar | 0 | - | 4.39 | 39,085 |
| Countries that Beat Iceland | 0 | - | 4.82 | 42,866 |
| Geography of the Spanish Empire | 0 | - | 4.49 | 37,165 |
| Medieval English History | 0 | - | 4.53 | 43,508 |
| British History Multiple Choice #1 | 0 | - | 4.46 | 55,145 |
| British History Multiple Choice #2 | 0 | - | 4.42 | 37,962 |
| Top 4 in English Football, 1888–2025 | 0 | - | 4.92 | 141,106 |
| Countries That Use the Euro | 0 | - | 4.95 | 105,037 |
| Flags of Europe Quiz | 0 | - | 4.99 | 1,244,192 |
| Countries of Europe - One Minute Sprint | 0 | - | 4.94 | 1,328,715 |
| 10 Easternmost Countries in Europe | 0 | - | 4.89 | 115,253 |
| The Only European Country ... | 0 | - | 4.91 | 216,637 |
| European Countries NOT in NATO | 0 | - | 4.90 | 61,139 |
| History of Russia Quiz | 0 | - | 4.47 | 31,918 |
| History of Germany | 0 | - | 4.39 | 52,821 |
| Ancient Greek Words | 0 | - | 4.93 | 111,604 |
| History of Italy | 0 | - | 4.55 | 31,975 |
| Geography of the Dutch Empire | 0 | - | 4.62 | 34,661 |
| Countries of the Spanish Empire | 0 | - | 4.52 | 77,237 |
| Counties of England | 0 | - | 4.97 | 796,783 |
| Invasions of Great Britain | 0 | - | 4.51 | 59,866 |
| The Reign of Queen Elizabeth II | 0 | - | 4.36 | 35,839 |
| "Big Five" European Soccer Champions Since 2000 | 0 | - | 4.97 | 355,992 |
| 10 Biggest European Countries by Area | 0 | - | 4.99 | 192,671 |
| 10 Westernmost Countries in Europe | 0 | - | 4.96 | 151,210 |
| Top 10 Languages Spoken in Europe | 0 | - | 4.96 | 218,717 |
| European Landmarks Map Quiz | 0 | - | 4.97 | 87,153 |
| Countries of Europe with an Empty Map | 0 | - | 5.00 | 310,519 |
| All First-Level Subdivisions of Europe on a Map | 0 | - | 4.99 | 171,872 |
| Countries with Territory in the Balkans | 0 | - | 4.96 | 89,290 |
| Eastern Europe Map Quiz | 0 | - | 4.91 | 128,193 |
| Slavic Countries | 0 | - | 4.96 | 111,664 |
| Most Popular Baby Boy Names in Germany | 0 | - | 4.34 | 67,055 |
| Biggest Cities in Germany in 1910 | 0 | - | 4.40 | 23,482 |
| Countries Closest to Germany A-Z | 0 | - | 4.98 | 27,304 |
| Ancient Greece A-Z | 0 | - | 4.60 | 23,144 |
| Ancient Greek Inventions | 0 | - | 4.18 | 16,346 |
| Roman Numeral Decoding Quiz | 0 | - | 4.94 | 437,117 |
| Two Letter Roman Numerals | 0 | - | 4.97 | 56,135 |
| The Reign of Henry VIII | 0 | - | 4.25 | 27,752 |
| Elizabeth I... or Elizabeth II? | 0 | - | 4.30 | 24,503 |
| Champions League Winners | 0 | - | 4.92 | 1,006,769 |
| Countries of the Mongol Empire on a Map | 0 | - | 4.99 | 106,865 |
| Top 10 Coldest European Countries | 0 | - | 4.94 | 193,119 |
| Top 10 Hottest European Countries | 0 | - | 4.88 | 127,011 |
| European Diaspora - Top 11 Countries | 0 | - | 4.90 | 95,859 |
| 10 European Countries with the Most Tourists | 0 | - | 4.98 | 137,528 |
| Three Band Flags of Europe | 0 | - | 4.98 | 193,318 |
| Pixelated Europe Map | 0 | - | 4.88 | 122,763 |
| Monarchies of Europe | 0 | - | 4.90 | 98,153 |
| European Countries with One Border | 0 | - | 4.97 | 182,784 |
| European Countries with the Fewest Borders | 0 | - | 4.97 | 179,579 |
| Category Elimination - European Geography #1 | 0 | - | 4.98 | 233,265 |
| European Map without 10 Random Countries | 0 | - | 4.97 | 276,832 |
| European Geography By Letter - B #2 | 0 | - | 4.85 | 78,583 |
| Category Elimination - European Geography #2 | 0 | - | 4.99 | 167,135 |
| Name a Valid European Country #1 | 0 | - | 4.99 | 261,022 |
| Name a Valid European Country #2 | 0 | - | 4.94 | 114,720 |
| Russia Country Quiz | 0 | - | 4.85 | 114,486 |
| Federal Subjects of Russia | 0 | - | 4.95 | 147,167 |
| Countries That Border Russia | 0 | - | 4.98 | 461,745 |
| Croatia Country Quiz | 0 | - | 4.83 | 43,343 |
| Countries Formerly in Yugoslavia | 0 | - | 4.95 | 124,903 |
| Bosnia and Herzegovina Country Quiz | 0 | - | 4.86 | 35,344 |
| History of Austria | 0 | - | 4.70 | 17,862 |
| Andorra Country Quiz | 0 | - | 4.90 | 31,688 |
| Regions of France Map Quiz | 0 | - | 4.97 | 144,441 |
| France Cities Map Quiz | 0 | - | 4.96 | 166,758 |
| Departments of France | 0 | - | 4.93 | 54,113 |
| Geography of the French Empire | 0 | - | 4.45 | 27,060 |
| The French Revolution | 0 | - | 4.47 | 23,935 |
| History of France | 0 | - | 4.59 | 56,980 |
| French History A-Z | 0 | - | 4.27 | 24,640 |
| Germany Cities Map Quiz | 0 | - | 4.87 | 126,339 |
| Figures from Greek Mythology | 0 | - | 4.91 | 186,968 |
| Regions of Italy | 0 | - | 4.92 | 75,881 |
| Italy Country Quiz | 0 | - | 4.80 | 123,409 |
| Regions of Italy Map Quiz | 0 | - | 4.96 | 149,385 |
| Italy Cities Map Quiz | 0 | - | 4.97 | 152,053 |
| Countries Surrounding Rome | 0 | - | 4.97 | 49,547 |
| Netherlands Immigration by Country | 0 | - | 4.93 | 52,166 |
| The Vikings! | 0 | - | 4.46 | 28,343 |
| The Portuguese Empire | 0 | - | 4.58 | 12,064 |
| Spain Cities Map Quiz | 0 | - | 4.87 | 96,928 |
| Regions of Spain Quiz | 0 | - | 4.90 | 113,948 |
| Regions of Spain Map Quiz | 0 | - | 4.95 | 185,648 |
| Cantons of Switzerland | 0 | - | 4.98 | 51,208 |
| Countries and Territories of the United Kingdom | 0 | - | 4.90 | 94,003 |
| Modern-Day Countries of the British Empire in 1921 | 0 | - | 4.99 | 117,621 |
| Wives of King Henry VIII | 0 | - | 4.55 | 53,351 |
| Countries the UK Declared War On | 0 | - | 4.61 | 122,480 |
| Geography of the British Empire | 0 | - | 4.48 | 39,672 |
| Animals in British History | 0 | - | 4.43 | 26,006 |
| The Reign of Queen Victoria | 0 | - | 4.33 | 23,444 |
| 10 Closest Megacities to London | 0 | - | 4.90 | 17,700 |
| England or Wales? | 0 | - | 4.94 | 45,689 |
| All UEFA Champions League Teams Ever | 0 | - | 4.85 | 130,352 |
| Modern-Day Countries of the Holy Roman Empire on a Map | 0 | - | 4.93 | 45,644 |
| U.S. Presidents Quiz | 0 | - | 5.00 | 3,698,765 |
| Deadliest U.S. Wars | 0 | - | 4.89 | 190,797 |
| Countries That Touch the Adriatic Sea | 0 | - | 4.96 | 71,109 |
| Top 10 European Countries by Coastline | 0 | - | 4.87 | 138,386 |
| 100 Longest Rivers in Europe - with a Map | 0 | - | 4.94 | 65,454 |
| Category Elimination - European Countries #1 | 0 | - | 4.89 | 90,061 |
| Countries that Border Poland | 0 | - | 4.99 | 172,281 |
| Non-Bordering Countries Closest to Russia | 0 | - | 4.91 | 82,849 |
| Countries With the Most Russian Speakers | 0 | - | 4.97 | 100,855 |
| Countries that Border Hungary | 0 | - | 4.98 | 104,229 |
| Countries Bordering Serbia | 0 | - | 4.96 | 92,399 |
| Countries that Beat France | 0 | - | 4.49 | 75,849 |
| France True or False? | 0 | - | 4.44 | 39,936 |
| French History Multiple Choice | 0 | - | 4.55 | 33,040 |
| Famous Germans by Picture | 0 | - | 4.12 | 16,843 |
| Countries that Beat Greece | 0 | - | 4.53 | 48,968 |
| Ancient Greek Trivia | 0 | - | 4.62 | 66,997 |
| Geography of Ancient Greece | 0 | - | 4.69 | 31,913 |
| Italian History A-Z | 0 | - | 4.21 | 17,707 |
| Byzantine History | 0 | - | 4.91 | 28,867 |
| Byzantine Emperors | 0 | - | 4.92 | 14,117 |
| History of The Netherlands | 0 | - | 4.46 | 17,436 |
| Countries that Beat the Netherlands | 0 | - | 4.56 | 36,361 |
| Denmark Country Quiz | 0 | - | 4.78 | 75,920 |
| Greenland Country Quiz | 0 | - | 4.78 | 36,375 |
| Most-Visited Countries by Swedes | 0 | - | 4.64 | 53,086 |
| Finland Country Quiz | 0 | - | 4.50 | 59,679 |
| Norway Country Quiz | 0 | - | 4.44 | 77,343 |
| Iceland Country Quiz | 0 | - | 4.69 | 43,162 |
| Spanish History A-Z | 0 | - | 4.37 | 19,294 |
| Countries Bordering Spain | 0 | - | 4.51 | 69,434 |
| Arthurian Legend | 0 | - | 4.33 | 25,109 |
| British Monopoly Board | 0 | - | 4.52 | 41,168 |
| Countries that Visit the UK the Most | 0 | - | 4.87 | 75,123 |
| British Geography Quiz #1 | 0 | - | 4.51 | 48,346 |
| Best-Selling British Musical Acts | 0 | - | 4.49 | 46,904 |
| Prime Ministers of the UK | 0 | - | 4.95 | 438,996 |
