| Deadliest U.S. Wars | 0 | - | 4.89 | 190,479 |
| Countries With the Most Russian Speakers | 0 | - | 4.97 | 100,139 |
| Name the English Monarchs | 0 | - | 4.91 | 501,338 |
| Countries that Beat Russia | 0 | - | 4.81 | 82,439 |
| States of the German Confederation in 1848 | 0 | - | 4.89 | 31,865 |
| Countries Italy Declared War On | 0 | - | 4.75 | 43,238 |
| Monarchies of Europe | 0 | - | 4.90 | 97,927 |
| Countries of Europe in 1815 With a Map | 0 | - | 4.99 | 149,854 |
| Countries of Europe in 1848 | 0 | - | 4.99 | 76,097 |
| Countries of Europe in 1870 with a Map | 0 | - | 4.95 | 64,252 |
| Every Country of Europe Since 1815 With a Map | 0 | - | 4.98 | 70,683 |
| Battle to Country | 0 | - | 4.91 | 53,117 |
| Top 10 Coldest European Countries | 0 | - | 4.94 | 192,850 |
| Top 10 Hottest European Countries | 0 | - | 4.88 | 126,757 |
| Category Elimination - European Geography #1 | 0 | - | 4.98 | 232,516 |
| Category Elimination - European Geography #2 | 0 | - | 4.99 | 166,612 |
| Russia Country Quiz | 0 | - | 4.85 | 114,250 |
| Countries That Border Russia | 0 | - | 4.98 | 461,024 |
| Europe Map Quiz | 0 | - | 5.00 | 4,754,628 |
| Biggest Countries in Europe in 1700 | 0 | - | 4.73 | 58,382 |
| Category Elimination - European Countries #1 | 0 | - | 4.89 | 89,738 |
| Countries that Border Poland | 0 | - | 4.99 | 172,027 |
| Countries Bordering Serbia | 0 | - | 4.96 | 92,232 |
| The Reign of Napoleon | 0 | - | 4.54 | 38,895 |
| Europe by Borders in 30 Seconds | 0 | - | 4.98 | 427,422 |
| Countries that Bordered the USSR | 0 | - | 4.93 | 165,142 |
| Countries Invaded by the USSR | 0 | - | 4.29 | 93,909 |
| The Trojan War | 0 | - | 4.83 | 39,639 |
| Letters of the Greek Alphabet | 0 | - | 4.97 | 645,947 |
| Name that Greek Letter | 0 | - | 4.93 | 323,044 |
| Greek Mythology General Knowledge #1 | 0 | - | 4.85 | 111,505 |
| Ancient Roman Trivia #1 | 0 | - | 4.85 | 84,401 |
| Roman Emperors | 0 | - | 4.95 | 119,631 |
| Axis Occupied Countries of WWII | 0 | - | 4.99 | 228,657 |
| Countries in World War I | 0 | - | 4.88 | 227,782 |
| Europe Cities Map Quiz | 0 | - | 4.99 | 363,887 |
| Olympian Gods Quiz | 0 | - | 4.96 | 499,456 |
| The Reign of Queen Elizabeth I | 0 | - | 4.53 | 31,735 |
| Houses of British Monarchs | 0 | - | 4.53 | 65,563 |
| Places Where Winston Churchill Said We Would Fight the Nazis | 0 | - | 4.57 | 14,593 |
| Zone 1 London Underground Stations - With a Map | 0 | - | 4.90 | 52,252 |
| The American Civil War | 0 | - | 4.62 | 52,365 |
| Countries That Use the Euro | 0 | - | 4.95 | 104,473 |
| Flags of Europe Quiz | 0 | - | 4.99 | 1,239,485 |
| Countries of Europe - One Minute Sprint | 0 | - | 4.94 | 1,325,883 |
| 10 Easternmost Countries in Europe | 0 | - | 4.89 | 114,779 |
| The Only European Country ... | 0 | - | 4.91 | 215,915 |
| European Countries NOT in NATO | 0 | - | 4.90 | 60,722 |
| History of Russia Quiz | 0 | - | 4.49 | 31,878 |
| Russian History A-Z | 0 | - | 4.38 | 31,572 |
| Biggest Trading Partners - Russia | 0 | - | 4.55 | 36,464 |
| Ancient Greek Words | 0 | - | 4.93 | 111,315 |
| History of Italy | 0 | - | 4.55 | 31,933 |
| Geography of the Dutch Empire | 0 | - | 4.61 | 34,608 |
| Countries of the Spanish Empire | 0 | - | 4.52 | 77,156 |
| Countries Closest to Spain A-Z | 0 | - | 4.98 | 108,101 |
| Counties of England | 0 | - | 4.97 | 794,557 |
| Invasions of Great Britain | 0 | - | 4.51 | 59,784 |
| British History A-Z #1 | 0 | - | 4.45 | 46,390 |
| "Big Five" European Soccer Champions Since 2000 | 0 | - | 4.97 | 354,069 |
| 10 Biggest European Countries by Area | 0 | - | 4.99 | 192,396 |
| 10 Westernmost Countries in Europe | 0 | - | 4.96 | 150,944 |
| Top 10 Languages Spoken in Europe | 0 | - | 4.96 | 218,101 |
| European Landmarks Map Quiz | 0 | - | 4.97 | 86,958 |
| European Secessionist Movements on a Map | 0 | - | 4.53 | 34,912 |
| Countries of Europe with an Empty Map | 0 | - | 5.00 | 309,915 |
| All First-Level Subdivisions of Europe on a Map | 0 | - | 4.98 | 170,480 |
| Countries with Territory in the Balkans | 0 | - | 4.96 | 88,970 |
| Eastern Europe Map Quiz | 0 | - | 4.91 | 127,695 |
| Slavic Countries | 0 | - | 4.96 | 111,465 |
| Countries Closest to Germany A-Z | 0 | - | 4.98 | 27,215 |
| Roman Numeral Decoding Quiz | 0 | - | 4.94 | 436,023 |
| Two Letter Roman Numerals | 0 | - | 4.97 | 55,988 |
| 100 Greatest Britons Quiz | 0 | - | 4.41 | 48,230 |
| The Thirteen Dwarves in the Hobbit | 0 | - | 4.81 | 28,594 |
| Champions League Winners | 0 | - | 4.92 | 1,003,510 |
| The Iraq War | 0 | - | 4.47 | 15,633 |
| Countries of the Mongol Empire on a Map | 0 | - | 4.99 | 106,585 |
| Top 10 Biggest Economies in Africa | 0 | - | 4.99 | 120,273 |
| Category Elimination - African Geography #1 | 0 | - | 4.90 | 92,040 |
| Top 10 Biggest Economies in the Americas | 0 | - | 4.94 | 91,873 |
| U.S. Cabinet Departments | 0 | - | 4.86 | 72,792 |
| European Diaspora - Top 11 Countries | 0 | - | 4.90 | 95,647 |
| 10 European Countries with the Most Tourists | 0 | - | 4.98 | 137,214 |
| Three Band Flags of Europe | 0 | - | 4.98 | 192,878 |
| Catholic Countries in Europe | 0 | - | 4.83 | 94,869 |
| Top 10 Biggest Economies in Europe | 0 | - | 4.98 | 198,839 |
| Pixelated Europe Map | 0 | - | 4.88 | 122,473 |
| European Countries with One Border | 0 | - | 4.97 | 182,476 |
| European Countries with the Fewest Borders | 0 | - | 4.97 | 179,285 |
| European Map without 10 Random Countries | 0 | - | 4.97 | 276,236 |
| European Geography By Letter - B #2 | 0 | - | 4.85 | 77,890 |
| Name a Valid European Country #1 | 0 | - | 4.99 | 259,824 |
| Name a Valid European Country #2 | 0 | - | 4.94 | 114,299 |
| Albania Country Quiz | 0 | - | 4.54 | 38,909 |
| Russia A-Z | 0 | - | 4.46 | 27,218 |
| Federal Subjects of Russia | 0 | - | 4.95 | 146,277 |
| Croatia Country Quiz | 0 | - | 4.83 | 43,221 |
| Countries Formerly in Yugoslavia | 0 | - | 4.95 | 124,703 |
| Bosnia and Herzegovina Country Quiz | 0 | - | 4.86 | 35,281 |
| Serbia Country Quiz | 0 | - | 4.44 | 34,964 |
| History of Austria | 0 | - | 4.70 | 17,831 |
| Regions of France Map Quiz | 0 | - | 4.97 | 144,096 |
| France Cities Map Quiz | 0 | - | 4.96 | 166,402 |
| Departments of France | 0 | - | 4.93 | 53,730 |
| Geography of the French Empire | 0 | - | 4.45 | 27,019 |
| The French Revolution | 0 | - | 4.46 | 23,897 |
| Countries Bordering France | 0 | - | 4.83 | 401,802 |
| Kings of France Quiz | 0 | - | 4.20 | 32,680 |
| History of France | 0 | - | 4.59 | 56,808 |
| Germany Country Quiz | 0 | - | 4.82 | 157,533 |
| States of Germany Map Quiz | 0 | - | 4.91 | 132,519 |
| Germany Cities Map Quiz | 0 | - | 4.87 | 125,847 |
| States of Germany | 0 | - | 4.96 | 151,805 |
| Biggest Cities in Germany in 1910 | 0 | - | 4.41 | 23,460 |
| Germany Immigration by Country | 0 | - | 4.85 | 80,859 |
| Countries Bordering Germany | 0 | - | 4.99 | 368,539 |
| German History A-Z | 0 | - | 4.49 | 24,567 |
| Figures from Greek Mythology | 0 | - | 4.91 | 186,378 |
| Regions of Italy | 0 | - | 4.92 | 75,517 |
| Italy Country Quiz | 0 | - | 4.82 | 123,161 |
| Regions of Italy Map Quiz | 0 | - | 4.96 | 149,073 |
| Italy Cities Map Quiz | 0 | - | 4.97 | 151,792 |
| Countries Surrounding Rome | 0 | - | 4.97 | 49,512 |
| Netherlands Immigration by Country | 0 | - | 4.93 | 51,792 |
| The Vikings! | 0 | - | 4.46 | 28,318 |
| The Portuguese Empire | 0 | - | 4.58 | 12,045 |
| Spain Cities Map Quiz | 0 | - | 4.87 | 96,643 |
| Regions of Spain Quiz | 0 | - | 4.90 | 113,600 |
| Regions of Spain Map Quiz | 0 | - | 4.95 | 185,338 |
| Cantons of Switzerland | 0 | - | 4.98 | 50,977 |
| Countries and Territories of the United Kingdom | 0 | - | 4.89 | 93,522 |
| Modern-Day Countries of the British Empire in 1921 | 0 | - | 4.99 | 117,190 |
| Wives of King Henry VIII | 0 | - | 4.55 | 53,303 |
| English Royal Consorts | 0 | - | 4.37 | 37,312 |
| Countries the UK Declared War On | 0 | - | 4.61 | 122,283 |
| Geography of the British Empire | 0 | - | 4.48 | 39,627 |
| The Life of Winston Churchill | 0 | - | 4.16 | 11,835 |
| 10 Closest Megacities to London | 0 | - | 4.90 | 17,656 |
| England or Wales? | 0 | - | 4.94 | 45,590 |
| All UEFA Champions League Teams Ever | 0 | - | 4.85 | 129,690 |
| Top 10 Coldest Asian Countries | 0 | - | 4.95 | 122,804 |
| Top 10 Biggest Economies in Asia | 0 | - | 4.88 | 129,345 |
| Monarchies of Asia | 0 | - | 4.97 | 70,962 |
| Category Elimination - Asian Geography #1 | 0 | - | 4.85 | 109,647 |
| Category Elimination - Asian Geography #2 | 0 | - | 4.94 | 96,327 |
| Asian Country Superlatives | 0 | - | 4.84 | 80,762 |
| The Vietnam War | 0 | - | 4.44 | 35,476 |
| Countries in World War II | 0 | - | 4.54 | 910,560 |
| Top 10 Richest Countries in Africa | 0 | - | 4.85 | 75,997 |
| Top 10 Richest Countries in the Americas | 0 | - | 4.93 | 83,316 |
| U.S. Five-Star Generals and Admirals | 0 | - | 4.33 | 8,327 |
| U.S. Presidents Quiz | 0 | - | 5.00 | 3,687,166 |
| U.S. Civil War Decoder | 0 | - | 4.14 | 25,248 |
| Canadian Prime Ministers | 0 | - | 4.63 | 57,414 |
| Countries That Touch the Adriatic Sea | 0 | - | 4.96 | 71,031 |
| Top 10 European Countries by Coastline | 0 | - | 4.87 | 138,268 |
| Top 10 Richest Countries in Europe | 0 | - | 4.90 | 149,342 |
| 100 Longest Rivers in Europe - with a Map | 0 | - | 4.94 | 65,333 |
| Biggest Trading Partners - European Union | 0 | - | 4.91 | 72,657 |
| Non-Bordering Countries Closest to Russia | 0 | - | 4.91 | 82,704 |
| Countries that Border Hungary | 0 | - | 4.98 | 104,079 |
| French Geography Quiz #1 | 0 | - | 4.89 | 34,704 |
| Countries Bordering Austria | 0 | - | 4.97 | 118,171 |
| Countries that Visit France the Most | 0 | - | 4.85 | 45,779 |
| Countries Closest to Metropolitan France | 0 | - | 4.89 | 72,081 |
| Countries With the Most German Speakers | 0 | - | 4.89 | 96,022 |
| Ancient Greek Trivia | 0 | - | 4.62 | 66,931 |
| Geography of Ancient Greece | 0 | - | 4.69 | 31,874 |
| Greek Mythology General Knowledge #2 | 0 | - | 4.59 | 73,442 |
| Ancient Greece - Multiple Choice | 0 | - | 4.54 | 41,600 |
| Counties of Ireland | 0 | - | 4.92 | 194,575 |
| Italian History A-Z | 0 | - | 4.21 | 17,665 |
| Countries Bordering Italy | 0 | - | 4.94 | 100,739 |
| Countries Closest to Italy | 0 | - | 4.97 | 197,674 |
| Ancient Roman Trivia #2 | 0 | - | 4.57 | 38,685 |
| Geography of the Roman Empire | 0 | - | 4.56 | 51,848 |
| Roman Names for Places | 0 | - | 4.62 | 58,166 |
| Byzantine History | 0 | - | 4.91 | 28,750 |
| History of The Netherlands | 0 | - | 4.46 | 17,403 |
| Geography of the Spanish Empire | 0 | - | 4.49 | 37,115 |
| Spanish History A-Z | 0 | - | 4.37 | 19,262 |
| Countries Closest to Spain | 0 | - | 4.96 | 226,567 |
| British Acronyms | 0 | - | 4.39 | 45,752 |
| British Monopoly Board | 0 | - | 4.52 | 41,137 |
| Counties of the UK and Ireland | 0 | - | 4.98 | 130,089 |
| Medieval English History | 0 | - | 4.53 | 43,453 |
| British History Multiple Choice #1 | 0 | - | 4.46 | 55,094 |
| British History Multiple Choice #2 | 0 | - | 4.42 | 37,923 |
| The Reign of Queen Elizabeth II | 0 | - | 4.36 | 35,804 |
| Prime Ministers of the UK | 0 | - | 4.95 | 437,680 |
| World Capitals Closest to London | 0 | - | 4.87 | 110,216 |
| 50 Busiest Air Routes from London | 0 | - | 4.87 | 96,665 |
| 2025–2026 Football League Teams | 0 | - | 4.93 | 400,156 |
| The Persian Gulf War | 0 | - | 4.02 | 8,441 |
| Important Cities in WWII | 0 | - | 4.42 | 93,337 |
| Countries that Have Won the Most Battles | 0 | - | 4.02 | 39,515 |
| Countries with the Most Hindus | 0 | - | 4.90 | 122,820 |
| Hindu Countries | 0 | - | 4.86 | 49,988 |
| 100 Most Influential Figures in U.S. History | 0 | - | 4.20 | 44,985 |
