| Name the English Monarchs | 0 | - | 4.91 | 502,714 |
| The Trojan War | 0 | - | 4.83 | 39,729 |
| Letters of the Greek Alphabet | 0 | - | 4.97 | 647,512 |
| Name that Greek Letter | 0 | - | 4.93 | 323,467 |
| Greek Mythology General Knowledge #1 | 0 | - | 4.85 | 111,861 |
| Ancient Roman Trivia #1 | 0 | - | 4.85 | 84,536 |
| Roman Emperors | 0 | - | 4.95 | 120,061 |
| States of the German Confederation in 1848 | 0 | - | 4.89 | 32,012 |
| Monarchies of Europe | 0 | - | 4.90 | 98,155 |
| European Geography By Letter - B #2 | 0 | - | 4.85 | 78,603 |
| Countries of Europe in 1815 With a Map | 0 | - | 4.99 | 150,376 |
| Countries of Europe in 1848 | 0 | - | 4.99 | 81,932 |
| Countries of Europe in 1870 with a Map | 0 | - | 4.95 | 64,686 |
| Every Country of Europe Since 1815 With a Map | 0 | - | 4.98 | 71,025 |
| Countries of Europe in 1360 with a Map | 0 | - | 4.99 | 56,898 |
| Countries Bordering France | 0 | - | 4.83 | 402,569 |
| Countries Bordering Germany | 0 | - | 4.99 | 369,435 |
| The Reign of Queen Elizabeth I | 0 | - | 4.53 | 31,795 |
| Houses of British Monarchs | 0 | - | 4.53 | 65,676 |
| Europe Map Quiz | 0 | - | 5.00 | 4,763,347 |
| Top 10 Coldest European Countries | 0 | - | 4.94 | 193,125 |
| Top 10 Hottest European Countries | 0 | - | 4.88 | 127,020 |
| Category Elimination - European Geography #1 | 0 | - | 4.98 | 233,289 |
| Category Elimination - European Geography #2 | 0 | - | 4.99 | 167,146 |
| Deadliest U.S. Wars | 0 | - | 4.89 | 190,803 |
| Biggest Countries in Europe in 1700 | 0 | - | 4.73 | 58,495 |
| French Geography Quiz #1 | 0 | - | 4.89 | 34,773 |
| Countries Bordering Austria | 0 | - | 4.97 | 118,325 |
| Countries that Visit France the Most | 0 | - | 4.85 | 45,873 |
| Countries Closest to Metropolitan France | 0 | - | 4.89 | 72,181 |
| Countries With the Most German Speakers | 0 | - | 4.89 | 96,730 |
| Ancient Greece A-Z | 0 | - | 4.60 | 23,146 |
| Counties of Ireland | 0 | - | 4.92 | 195,303 |
| Countries Bordering Italy | 0 | - | 4.94 | 100,868 |
| Countries Closest to Italy | 0 | - | 4.97 | 198,055 |
| Countries Closest to Spain | 0 | - | 4.96 | 226,999 |
| Counties of the UK and Ireland | 0 | - | 4.98 | 130,760 |
| British History A-Z #1 | 0 | - | 4.45 | 46,485 |
| World Capitals Closest to London | 0 | - | 4.88 | 110,658 |
| 50 Busiest Air Routes from London | 0 | - | 4.87 | 96,845 |
| Europe by Borders in 30 Seconds | 0 | - | 4.98 | 428,245 |
| Country Quiz on a Map - France | 0 | - | 4.98 | 47,212 |
| Countries that Beat Germany | 0 | - | 4.94 | 106,443 |
| Country Quiz on a Map - Germany | 0 | - | 4.95 | 35,043 |
| The Life of Alexander the Great | 0 | - | 4.51 | 18,501 |
| Countries Italy Declared War On | 0 | - | 4.75 | 43,334 |
| Countries that Beat Italy | 0 | - | 4.85 | 54,495 |
| Countries Closest to Iceland | 0 | - | 4.90 | 73,584 |
| Countries that Beat Portugal | 0 | - | 4.86 | 59,348 |
| Countries that Beat Spain | 0 | - | 4.94 | 62,949 |
| British Monopoly Board | 0 | - | 4.52 | 41,169 |
| The United States... or the United Kingdom? | 0 | - | 4.87 | 98,543 |
| English Royal Consorts | 0 | - | 4.38 | 37,357 |
| 2025–2026 Football League Teams | 0 | - | 4.94 | 401,458 |
| Countries That Use the Euro | 0 | - | 4.95 | 105,049 |
| Europe Cities Map Quiz | 0 | - | 4.99 | 364,497 |
| 10 Easternmost Countries in Europe | 0 | - | 4.89 | 115,268 |
| The Only European Country ... | 0 | - | 4.91 | 216,656 |
| European Countries NOT in NATO | 0 | - | 4.90 | 61,152 |
| German History A-Z | 0 | - | 4.49 | 24,612 |
| Olympian Gods Quiz | 0 | - | 4.96 | 500,876 |
| The Life of Julius Caesar | 0 | - | 4.39 | 39,086 |
| History of The Netherlands | 0 | - | 4.46 | 17,436 |
| Countries that Beat Iceland | 0 | - | 4.82 | 42,871 |
| Zone 1 London Underground Stations - With a Map | 0 | - | 4.90 | 52,356 |
| Top 4 in English Football, 1888–2025 | 0 | - | 4.92 | 141,128 |
| Flags of Europe Quiz | 0 | - | 4.99 | 1,244,311 |
| Countries of Europe - One Minute Sprint | 0 | - | 4.94 | 1,328,791 |
| History of Russia Quiz | 0 | - | 4.47 | 31,919 |
| Ancient Greek Words | 0 | - | 4.93 | 111,618 |
| Greek Mythology General Knowledge #2 | 0 | - | 4.59 | 73,678 |
| Ancient Greece - Multiple Choice | 0 | - | 4.54 | 41,663 |
| History of Italy | 0 | - | 4.55 | 31,977 |
| Italian History A-Z | 0 | - | 4.21 | 17,708 |
| Ancient Roman Trivia #2 | 0 | - | 4.57 | 38,749 |
| Geography of the Roman Empire | 0 | - | 4.56 | 51,937 |
| Roman Names for Places | 0 | - | 4.62 | 58,291 |
| Geography of the Dutch Empire | 0 | - | 4.62 | 34,661 |
| Countries that Beat the Netherlands | 0 | - | 4.56 | 36,362 |
| Countries of the Spanish Empire | 0 | - | 4.52 | 77,237 |
| Geography of the Spanish Empire | 0 | - | 4.49 | 37,165 |
| Spanish History A-Z | 0 | - | 4.37 | 19,298 |
| Counties of England | 0 | - | 4.97 | 796,889 |
| Invasions of Great Britain | 0 | - | 4.51 | 59,867 |
| English First Names of the Middle Ages | 0 | - | 4.47 | 60,677 |
| British History Quiz for Dummies | 0 | - | 4.70 | 78,611 |
| The Reign of Queen Elizabeth II | 0 | - | 4.36 | 35,843 |
| "Big Five" European Soccer Champions Since 2000 | 0 | - | 4.97 | 356,038 |
| European Geography By Letter - A | 0 | - | 4.52 | 146,315 |
| European Geography By Letter - B #1 | 0 | - | 4.64 | 119,246 |
| European Geography By Letter - C | 0 | - | 4.46 | 114,035 |
| European Geography By Letter - D | 0 | - | 4.50 | 108,678 |
| European Geography By Letter - L | 0 | - | 4.52 | 113,564 |
| European Geography By Letter - M | 0 | - | 4.67 | 130,711 |
| European Geography By Letter - P #1 | 0 | - | 4.80 | 97,576 |
| European Geography By Letter - N | 0 | - | 4.44 | 100,882 |
| European Geography By Letter - R | 0 | - | 4.42 | 93,727 |
| European Geography By Letter - V | 0 | - | 4.43 | 93,036 |
| European Geography By Letter - T | 0 | - | 4.41 | 82,469 |
| European Geography By Letter - S #1 | 0 | - | 4.63 | 100,629 |
| 10 Biggest European Countries by Area | 0 | - | 4.99 | 192,677 |
| 10 Westernmost Countries in Europe | 0 | - | 4.96 | 151,216 |
| Top 10 Languages Spoken in Europe | 0 | - | 4.96 | 218,736 |
| European Landmarks Map Quiz | 0 | - | 4.97 | 87,158 |
| European Secessionist Movements on a Map | 0 | - | 4.53 | 34,990 |
| Countries of Europe with an Empty Map | 0 | - | 5.00 | 310,535 |
| All First-Level Subdivisions of Europe on a Map | 0 | - | 4.99 | 171,907 |
| Countries with Territory in the Balkans | 0 | - | 4.96 | 89,298 |
| Eastern Europe Map Quiz | 0 | - | 4.91 | 128,196 |
| Slavic Countries | 0 | - | 4.96 | 111,669 |
| Russian History A-Z | 0 | - | 4.38 | 31,721 |
| The Reign of Napoleon | 0 | - | 4.54 | 38,959 |
| Famous Irish People | 0 | - | 4.05 | 45,994 |
| Roman Numeral Decoding Quiz | 0 | - | 4.94 | 437,159 |
| Two Letter Roman Numerals | 0 | - | 4.97 | 56,138 |
| 100 Greatest Britons Quiz | 0 | - | 4.41 | 48,267 |
| British Geography A-Z | 0 | - | 4.42 | 19,522 |
| The Reign of Henry VIII | 0 | - | 4.25 | 27,756 |
| Elizabeth I... or Elizabeth II? | 0 | - | 4.30 | 24,503 |
| London A-Z | 0 | - | 4.10 | 40,775 |
| Champions League Winners | 0 | - | 4.92 | 1,006,855 |
| U.S. Citizenship Test Questions | 0 | - | 4.83 | 239,471 |
| European Diaspora - Top 11 Countries | 0 | - | 4.90 | 95,867 |
| 10 European Countries with the Most Tourists | 0 | - | 4.98 | 137,543 |
| Three Band Flags of Europe | 0 | - | 4.98 | 193,336 |
| Catholic Countries in Europe | 0 | - | 4.83 | 95,144 |
| Pixelated Europe Map | 0 | - | 4.88 | 122,770 |
| European Countries with One Border | 0 | - | 4.97 | 182,789 |
| European Countries with the Fewest Borders | 0 | - | 4.97 | 179,585 |
| Category Elimination - European Geography #3 | 0 | - | 4.86 | 80,990 |
| Federal Subjects of Russia | 0 | - | 4.95 | 147,256 |
| Countries That Border Russia | 0 | - | 4.98 | 461,760 |
| Countries Formerly in Yugoslavia | 0 | - | 4.95 | 124,911 |
| History of Austria | 0 | - | 4.70 | 17,863 |
| Regions of France Map Quiz | 0 | - | 4.97 | 144,449 |
| Geography of the French Empire | 0 | - | 4.45 | 27,060 |
| The French Revolution | 0 | - | 4.47 | 23,936 |
| Kings of France Quiz | 0 | - | 4.20 | 32,746 |
| History of France | 0 | - | 4.59 | 56,985 |
| French History A-Z | 0 | - | 4.27 | 24,646 |
| States of Germany Map Quiz | 0 | - | 4.91 | 132,826 |
| States of Germany | 0 | - | 4.96 | 152,618 |
| Germany Immigration by Country | 0 | - | 4.85 | 81,047 |
| Figures from Greek Mythology | 0 | - | 4.91 | 186,985 |
| Regions of Italy | 0 | - | 4.92 | 75,889 |
| Seven Hills of Rome | 0 | - | 4.70 | 9,183 |
| Netherlands Immigration by Country | 0 | - | 4.93 | 52,178 |
| The Vikings! | 0 | - | 4.46 | 28,343 |
| The Portuguese Empire | 0 | - | 4.58 | 12,066 |
| Regions of Spain Quiz | 0 | - | 4.90 | 113,954 |
| Cantons of Switzerland | 0 | - | 4.98 | 51,214 |
| Countries and Territories of the United Kingdom | 0 | - | 4.90 | 94,005 |
| United Kingdom A-Z | 0 | - | 4.52 | 88,041 |
| Wives of King Henry VIII | 0 | - | 4.55 | 53,353 |
| Countries the UK Declared War On | 0 | - | 4.61 | 122,486 |
| Geography of the British Empire | 0 | - | 4.48 | 39,674 |
| The Reign of Queen Victoria | 0 | - | 4.33 | 23,444 |
| 10 Closest Megacities to London | 0 | - | 4.90 | 17,701 |
| Asian Geography By Letter - B | 0 | - | 4.85 | 66,517 |
| Monarchies of Asia | 0 | - | 4.97 | 71,092 |
| Asian Country Superlatives | 0 | - | 4.84 | 80,894 |
| Battle to Country | 0 | - | 4.91 | 53,349 |
| Countries of the Mongol Empire on a Map | 0 | - | 4.99 | 106,872 |
| Category Elimination - African Geography #1 | 0 | - | 4.90 | 92,360 |
| Top 10 Richest Countries in the Americas | 0 | - | 4.93 | 84,004 |
| Top 10 Biggest Economies in the Americas | 0 | - | 4.94 | 92,190 |
| U.S. Cabinet Departments | 0 | - | 4.86 | 72,880 |
| U.S. Presidents Quiz | 0 | - | 5.00 | 3,699,007 |
| European Geography By Letter - E | 0 | - | 4.23 | 113,783 |
| European Geography By Letter - F | 0 | - | 4.17 | 92,964 |
| European Geography By Letter - H | 0 | - | 4.30 | 96,098 |
| European Geography By Letter - G | 0 | - | 4.27 | 102,763 |
| European Geography By Letter - I | 0 | - | 4.10 | 95,570 |
| European Geography By Letter - K | 0 | - | 4.14 | 70,211 |
| European Geography By Letter - O | 0 | - | 4.28 | 62,769 |
| European Geography by Letter - W | 0 | - | 4.20 | 82,947 |
| European Geography By Letter - S #2 | 0 | - | 4.19 | 51,215 |
| Countries That Touch the Adriatic Sea | 0 | - | 4.96 | 71,113 |
| European Geography A-Z | 0 | - | 4.29 | 49,271 |
| Top 10 European Countries by Coastline | 0 | - | 4.87 | 138,391 |
| 100 Longest Rivers in Europe - with a Map | 0 | - | 4.94 | 65,456 |
| European Map without 10 Random Countries | 0 | - | 4.97 | 276,842 |
| Category Elimination - European Countries #1 | 0 | - | 4.89 | 90,064 |
| Name a Valid European Country #1 | 0 | - | 4.99 | 261,047 |
| Name a Valid European Country #2 | 0 | - | 4.94 | 114,726 |
| Countries that Border Poland | 0 | - | 4.99 | 172,284 |
| Russia Country Quiz | 0 | - | 4.85 | 114,498 |
| Non-Bordering Countries Closest to Russia | 0 | - | 4.91 | 82,853 |
| Countries With the Most Russian Speakers | 0 | - | 4.97 | 100,879 |
| Croatia Country Quiz | 0 | - | 4.83 | 43,347 |
| Countries that Border Hungary | 0 | - | 4.98 | 104,234 |
| Bosnia and Herzegovina Country Quiz | 0 | - | 4.86 | 35,344 |
| Countries Bordering Serbia | 0 | - | 4.96 | 92,405 |
| Andorra Country Quiz | 0 | - | 4.90 | 31,692 |
| France Cities Map Quiz | 0 | - | 4.96 | 166,773 |
| Departments of France | 0 | - | 4.93 | 54,120 |
| Most Popular Baby Girls Names in Germany | 0 | - | 4.51 | 38,799 |
| Germany Country Quiz | 0 | - | 4.83 | 157,869 |
| Germany Cities Map Quiz | 0 | - | 4.87 | 126,353 |
| Ancient Greek Trivia | 0 | - | 4.62 | 66,999 |
