| Deadliest U.S. Wars | 0 | - | 4.89 | 190,179 |
| Countries With the Most Russian Speakers | 0 | - | 4.97 | 99,761 |
| Name the English Monarchs | 0 | - | 4.91 | 500,539 |
| Countries that Beat Russia | 0 | - | 4.81 | 82,319 |
| Axis Occupied Countries of WWII | 0 | - | 4.99 | 228,440 |
| Countries in World War I | 0 | - | 4.88 | 227,576 |
| States of the German Confederation in 1848 | 0 | - | 4.90 | 31,802 |
| Countries Italy Declared War On | 0 | - | 4.75 | 43,178 |
| Monarchies of Europe | 0 | - | 4.90 | 97,770 |
| Countries of Europe in 1815 With a Map | 0 | - | 4.99 | 149,643 |
| Countries of Europe in 1848 | 0 | - | 4.99 | 75,948 |
| Countries of Europe in 1870 with a Map | 0 | - | 4.95 | 64,074 |
| Every Country of Europe Since 1815 With a Map | 0 | - | 4.98 | 70,561 |
| Battle to Country | 0 | - | 4.91 | 52,997 |
| Top 10 Coldest European Countries | 0 | - | 4.94 | 192,707 |
| Top 10 Hottest European Countries | 0 | - | 4.88 | 126,584 |
| Category Elimination - European Geography #1 | 0 | - | 4.98 | 232,082 |
| Category Elimination - European Geography #2 | 0 | - | 4.99 | 166,266 |
| Russia Country Quiz | 0 | - | 4.85 | 114,110 |
| Countries That Border Russia | 0 | - | 4.98 | 460,576 |
| Europe Map Quiz | 0 | - | 5.00 | 4,748,860 |
| Biggest Countries in Europe in 1700 | 0 | - | 4.73 | 58,326 |
| Category Elimination - European Countries #1 | 0 | - | 4.89 | 89,585 |
| Countries that Border Poland | 0 | - | 4.99 | 171,872 |
| Countries Bordering Serbia | 0 | - | 4.96 | 92,126 |
| The Reign of Napoleon | 0 | - | 4.54 | 38,850 |
| Countries in World War II | 0 | - | 4.54 | 909,203 |
| Europe by Borders in 30 Seconds | 0 | - | 4.98 | 426,817 |
| Countries that Bordered the USSR | 0 | - | 4.93 | 164,962 |
| Countries Invaded by the USSR | 0 | - | 4.29 | 93,826 |
| The Trojan War | 0 | - | 4.83 | 39,596 |
| Letters of the Greek Alphabet | 0 | - | 4.97 | 645,118 |
| Name that Greek Letter | 0 | - | 4.93 | 322,754 |
| Greek Mythology General Knowledge #1 | 0 | - | 4.85 | 111,294 |
| Ancient Roman Trivia #1 | 0 | - | 4.85 | 84,330 |
| Roman Emperors | 0 | - | 4.95 | 119,424 |
| Europe Cities Map Quiz | 0 | - | 4.99 | 363,459 |
| Olympian Gods Quiz | 0 | - | 4.96 | 498,790 |
| The Reign of Queen Elizabeth I | 0 | - | 4.53 | 31,705 |
| Houses of British Monarchs | 0 | - | 4.53 | 65,511 |
| Zone 1 London Underground Stations - With a Map | 0 | - | 4.90 | 52,187 |
| The Vietnam War | 0 | - | 4.43 | 35,429 |
| Important Cities in WWII | 0 | - | 4.42 | 93,247 |
| The American Civil War | 0 | - | 4.62 | 52,316 |
| Countries That Use the Euro | 0 | - | 4.95 | 104,141 |
| Flags of Europe Quiz | 0 | - | 4.99 | 1,236,427 |
| Countries of Europe - One Minute Sprint | 0 | - | 4.94 | 1,324,279 |
| 10 Easternmost Countries in Europe | 0 | - | 4.89 | 114,474 |
| The Only European Country ... | 0 | - | 4.91 | 215,426 |
| European Countries NOT in NATO | 0 | - | 4.90 | 60,475 |
| History of Russia Quiz | 0 | - | 4.49 | 31,859 |
| Russian History A-Z | 0 | - | 4.38 | 31,466 |
| Biggest Trading Partners - Russia | 0 | - | 4.55 | 36,430 |
| Ancient Greek Words | 0 | - | 4.93 | 111,185 |
| History of Italy | 0 | - | 4.55 | 31,911 |
| Geography of the Dutch Empire | 0 | - | 4.61 | 34,586 |
| Countries of the Spanish Empire | 0 | - | 4.52 | 77,115 |
| Countries Closest to Spain A-Z | 0 | - | 4.98 | 108,003 |
| Counties of England | 0 | - | 4.97 | 793,244 |
| Invasions of Great Britain | 0 | - | 4.51 | 59,750 |
| British History A-Z #1 | 0 | - | 4.45 | 46,330 |
| "Big Five" European Soccer Champions Since 2000 | 0 | - | 4.97 | 353,043 |
| 10 Biggest European Countries by Area | 0 | - | 4.99 | 192,242 |
| 10 Westernmost Countries in Europe | 0 | - | 4.96 | 150,779 |
| Top 10 Languages Spoken in Europe | 0 | - | 4.96 | 217,670 |
| European Landmarks Map Quiz | 0 | - | 4.97 | 86,838 |
| European Secessionist Movements on a Map | 0 | - | 4.53 | 34,872 |
| Countries of Europe with an Empty Map | 0 | - | 5.00 | 309,536 |
| All First-Level Subdivisions of Europe on a Map | 0 | - | 4.98 | 169,797 |
| Countries with Territory in the Balkans | 0 | - | 4.96 | 88,828 |
| Eastern Europe Map Quiz | 0 | - | 4.91 | 127,585 |
| Slavic Countries | 0 | - | 4.96 | 111,330 |
| Countries Closest to Germany A-Z | 0 | - | 4.98 | 27,151 |
| Roman Numeral Decoding Quiz | 0 | - | 4.94 | 435,427 |
| Two Letter Roman Numerals | 0 | - | 4.97 | 55,881 |
| 100 Greatest Britons Quiz | 0 | - | 4.41 | 48,168 |
| The Thirteen Dwarves in the Hobbit | 0 | - | 4.81 | 28,484 |
| Places Where Winston Churchill Said We Would Fight the Nazis | 0 | - | 4.57 | 14,583 |
| Champions League Winners | 0 | - | 4.92 | 1,001,674 |
| Countries of the Mongol Empire on a Map | 0 | - | 4.99 | 106,421 |
| Top 10 Biggest Economies in Africa | 0 | - | 4.99 | 119,852 |
| Category Elimination - African Geography #1 | 0 | - | 4.90 | 91,877 |
| Top 10 Biggest Economies in the Americas | 0 | - | 4.93 | 91,536 |
| U.S. Cabinet Departments | 0 | - | 4.86 | 72,726 |
| European Geography By Letter - P #1 | 0 | - | 4.81 | 96,659 |
| European Diaspora - Top 11 Countries | 0 | - | 4.90 | 95,512 |
| 10 European Countries with the Most Tourists | 0 | - | 4.98 | 137,049 |
| Three Band Flags of Europe | 0 | - | 4.98 | 192,636 |
| Catholic Countries in Europe | 0 | - | 4.83 | 94,673 |
| Top 10 Biggest Economies in Europe | 0 | - | 4.98 | 198,246 |
| Pixelated Europe Map | 0 | - | 4.88 | 122,323 |
| European Countries with One Border | 0 | - | 4.97 | 182,241 |
| European Countries with the Fewest Borders | 0 | - | 4.97 | 179,098 |
| European Map without 10 Random Countries | 0 | - | 4.97 | 275,871 |
| European Geography By Letter - B #2 | 0 | - | 4.84 | 76,743 |
| Name a Valid European Country #1 | 0 | - | 4.99 | 259,154 |
| Name a Valid European Country #2 | 0 | - | 4.94 | 114,048 |
| Albania Country Quiz | 0 | - | 4.54 | 38,856 |
| Russia A-Z | 0 | - | 4.46 | 27,204 |
| Federal Subjects of Russia | 0 | - | 4.95 | 145,655 |
| Croatia Country Quiz | 0 | - | 4.83 | 43,143 |
| Countries Formerly in Yugoslavia | 0 | - | 4.95 | 124,588 |
| Bosnia and Herzegovina Country Quiz | 0 | - | 4.86 | 35,225 |
| Serbia Country Quiz | 0 | - | 4.44 | 34,930 |
| History of Austria | 0 | - | 4.70 | 17,815 |
| Regions of France Map Quiz | 0 | - | 4.97 | 143,929 |
| France Cities Map Quiz | 0 | - | 4.96 | 166,151 |
| Departments of France | 0 | - | 4.93 | 53,453 |
| Geography of the French Empire | 0 | - | 4.45 | 27,008 |
| The French Revolution | 0 | - | 4.46 | 23,877 |
| Countries Bordering France | 0 | - | 4.83 | 401,380 |
| Kings of France Quiz | 0 | - | 4.20 | 32,639 |
| History of France | 0 | - | 4.59 | 56,678 |
| Germany Country Quiz | 0 | - | 4.82 | 157,305 |
| States of Germany Map Quiz | 0 | - | 4.91 | 132,312 |
| Germany Cities Map Quiz | 0 | - | 4.87 | 125,686 |
| States of Germany | 0 | - | 4.96 | 151,324 |
| Biggest Cities in Germany in 1910 | 0 | - | 4.41 | 23,443 |
| Germany Immigration by Country | 0 | - | 4.85 | 80,678 |
| Countries Bordering Germany | 0 | - | 4.99 | 368,189 |
| German History A-Z | 0 | - | 4.49 | 24,535 |
| Figures from Greek Mythology | 0 | - | 4.91 | 186,017 |
| Regions of Italy | 0 | - | 4.92 | 75,309 |
| Italy Country Quiz | 0 | - | 4.82 | 122,790 |
| Regions of Italy Map Quiz | 0 | - | 4.96 | 148,925 |
| Italy Cities Map Quiz | 0 | - | 4.97 | 151,605 |
| Countries Surrounding Rome | 0 | - | 4.97 | 49,468 |
| Netherlands Immigration by Country | 0 | - | 4.93 | 50,883 |
| The Vikings! | 0 | - | 4.46 | 28,300 |
| The Portuguese Empire | 0 | - | 4.58 | 12,035 |
| Spain Cities Map Quiz | 0 | - | 4.87 | 96,514 |
| Regions of Spain Quiz | 0 | - | 4.90 | 113,339 |
| Regions of Spain Map Quiz | 0 | - | 4.95 | 185,144 |
| Cantons of Switzerland | 0 | - | 4.98 | 50,798 |
| Countries and Territories of the United Kingdom | 0 | - | 4.89 | 93,406 |
| Modern-Day Countries of the British Empire in 1921 | 0 | - | 4.99 | 116,981 |
| Wives of King Henry VIII | 0 | - | 4.55 | 53,280 |
| English Royal Consorts | 0 | - | 4.37 | 37,284 |
| Countries the UK Declared War On | 0 | - | 4.61 | 122,171 |
| Geography of the British Empire | 0 | - | 4.48 | 39,602 |
| 10 Closest Megacities to London | 0 | - | 4.90 | 17,631 |
| England or Wales? | 0 | - | 4.94 | 45,518 |
| All UEFA Champions League Teams Ever | 0 | - | 4.85 | 129,408 |
| Top 10 Coldest Asian Countries | 0 | - | 4.95 | 122,723 |
| Top 10 Biggest Economies in Asia | 0 | - | 4.85 | 120,177 |
| Monarchies of Asia | 0 | - | 4.97 | 70,877 |
| Category Elimination - Asian Geography #1 | 0 | - | 4.85 | 109,439 |
| Category Elimination - Asian Geography #2 | 0 | - | 4.94 | 96,144 |
| Asian Country Superlatives | 0 | - | 4.83 | 80,690 |
| Top 10 Richest Countries in Africa | 0 | - | 4.85 | 75,597 |
| Top 10 Richest Countries in the Americas | 0 | - | 4.93 | 82,413 |
| U.S. Five-Star Generals and Admirals | 0 | - | 4.33 | 8,320 |
| U.S. Presidents Quiz | 0 | - | 5.00 | 3,678,917 |
| U.S. Civil War Decoder | 0 | - | 4.14 | 25,236 |
| Canadian Prime Ministers | 0 | - | 4.63 | 57,325 |
| Countries That Touch the Adriatic Sea | 0 | - | 4.96 | 70,964 |
| Top 10 European Countries by Coastline | 0 | - | 4.87 | 138,165 |
| Top 10 Richest Countries in Europe | 0 | - | 4.90 | 148,893 |
| 100 Longest Rivers in Europe - with a Map | 0 | - | 4.94 | 65,195 |
| Biggest Trading Partners - European Union | 0 | - | 4.91 | 72,469 |
| Non-Bordering Countries Closest to Russia | 0 | - | 4.91 | 82,616 |
| Countries that Border Hungary | 0 | - | 4.98 | 103,988 |
| French Geography Quiz #1 | 0 | - | 4.89 | 34,667 |
| Countries Bordering Austria | 0 | - | 4.97 | 118,074 |
| Countries that Visit France the Most | 0 | - | 4.85 | 45,731 |
| Countries Closest to Metropolitan France | 0 | - | 4.89 | 72,025 |
| Countries With the Most German Speakers | 0 | - | 4.89 | 95,628 |
| Ancient Greek Trivia | 0 | - | 4.62 | 66,885 |
| Geography of Ancient Greece | 0 | - | 4.69 | 31,852 |
| Greek Mythology General Knowledge #2 | 0 | - | 4.59 | 73,319 |
| Ancient Greece - Multiple Choice | 0 | - | 4.54 | 41,562 |
| Counties of Ireland | 0 | - | 4.92 | 194,203 |
| Italian History A-Z | 0 | - | 4.21 | 17,638 |
| Countries Bordering Italy | 0 | - | 4.94 | 100,668 |
| Countries Closest to Italy | 0 | - | 4.97 | 197,465 |
| Ancient Roman Trivia #2 | 0 | - | 4.57 | 38,652 |
| Geography of the Roman Empire | 0 | - | 4.56 | 51,814 |
| Roman Names for Places | 0 | - | 4.62 | 58,093 |
| Byzantine History | 0 | - | 4.91 | 28,720 |
| History of The Netherlands | 0 | - | 4.46 | 17,375 |
| Geography of the Spanish Empire | 0 | - | 4.49 | 37,093 |
| Spanish History A-Z | 0 | - | 4.37 | 19,238 |
| Countries Closest to Spain | 0 | - | 4.96 | 226,348 |
| British Acronyms | 0 | - | 4.39 | 45,722 |
| British Monopoly Board | 0 | - | 4.52 | 41,108 |
| Counties of the UK and Ireland | 0 | - | 4.98 | 129,707 |
| Medieval English History | 0 | - | 4.53 | 43,423 |
| British History Multiple Choice #1 | 0 | - | 4.46 | 55,066 |
| British History Multiple Choice #2 | 0 | - | 4.42 | 37,905 |
| The Reign of Queen Elizabeth II | 0 | - | 4.36 | 35,777 |
| Prime Ministers of the UK | 0 | - | 4.95 | 436,999 |
| World Capitals Closest to London | 0 | - | 4.87 | 110,110 |
| 50 Busiest Air Routes from London | 0 | - | 4.87 | 96,548 |
| 2025–2026 Football League Teams | 0 | - | 4.93 | 399,457 |
| Countries that Have Won the Most Battles | 0 | - | 4.02 | 39,477 |
| Countries with the Most Hindus | 0 | - | 4.90 | 122,714 |
| Hindu Countries | 0 | - | 4.86 | 49,887 |
| 100 Most Influential Figures in U.S. History | 0 | - | 4.20 | 44,911 |
| Top 10 Coldest U.S. States | 0 | - | 4.94 | 124,307 |
| Top 10 Hottest U.S. States | 0 | - | 4.86 | 125,185 |
