| The Dictator Files: Vladimir Lenin | 0 | - | 4.45 | 26,800 |
| Countries of the Soviet Union | 0 | - | 4.98 | 194,557 |
| Soviet Leaders 1917–1991 | 0 | - | 4.44 | 94,967 |
| Name the English Monarchs | 0 | - | 4.91 | 502,444 |
| Countries Invaded by the USSR | 0 | - | 4.29 | 94,006 |
| Monarchies of Europe | 0 | - | 4.90 | 98,114 |
| Countries of Europe in 1815 With a Map | 0 | - | 4.99 | 150,169 |
| Countries of Europe in 1848 | 0 | - | 4.99 | 81,417 |
| Countries of Europe in 1870 with a Map | 0 | - | 4.95 | 64,599 |
| Every Country of Europe Since 1815 With a Map | 0 | - | 4.98 | 70,942 |
| U.S. Cabinet Departments | 0 | - | 4.86 | 72,862 |
| U.S. Presidents Quiz | 0 | - | 5.00 | 3,696,547 |
| Top 10 Coldest European Countries | 0 | - | 4.94 | 193,084 |
| Top 10 Hottest European Countries | 0 | - | 4.88 | 126,964 |
| European Secessionist Movements on a Map | 0 | - | 4.53 | 34,974 |
| Top 10 Biggest Economies in Europe | 0 | - | 4.98 | 199,338 |
| Modern-Day Countries of the British Empire in 1921 | 0 | - | 4.99 | 117,545 |
| Communist Countries in History | 0 | - | 4.63 | 495,568 |
| Deadliest U.S. Wars | 0 | - | 4.89 | 190,745 |
| Europe Map Quiz | 0 | - | 5.00 | 4,761,699 |
| Top 10 Richest Countries in Europe | 0 | - | 4.90 | 149,688 |
| Biggest Trading Partners - European Union | 0 | - | 4.91 | 72,801 |
| Category Elimination - European Countries #1 | 0 | - | 4.89 | 90,014 |
| Prime Ministers of the UK | 0 | - | 4.95 | 438,755 |
| Canadian Prime Ministers | 0 | - | 4.63 | 57,510 |
| Zone 1 London Underground Stations - With a Map | 0 | - | 4.90 | 52,342 |
| Axis Occupied Countries of WWII | 0 | - | 4.99 | 228,955 |
| Countries in World War I | 0 | - | 4.88 | 228,084 |
| U.S. Presidents by Picture | 0 | - | 4.87 | 426,364 |
| First Names of U.S. Presidents | 0 | - | 4.86 | 381,488 |
| Countries That Use the Euro | 0 | - | 4.95 | 104,947 |
| Europe Cities Map Quiz | 0 | - | 4.99 | 364,373 |
| 10 Easternmost Countries in Europe | 0 | - | 4.89 | 115,172 |
| The Only European Country ... | 0 | - | 4.91 | 216,518 |
| European Countries NOT in NATO | 0 | - | 4.90 | 61,062 |
| Countries Closest to Spain A-Z | 0 | - | 4.98 | 108,240 |
| Countries Closest to the United Kingdom A-Z | 0 | - | 4.96 | 190,826 |
| The Reign of Queen Elizabeth I | 0 | - | 4.53 | 31,785 |
| British History A-Z #1 | 0 | - | 4.45 | 46,476 |
| Houses of British Monarchs | 0 | - | 4.53 | 65,646 |
| Name a Valid U.S. President #1 | 0 | - | 4.89 | 191,722 |
| Play-Doh Presidents | 0 | - | 5.00 | 82,271 |
| Flags of Europe Quiz | 0 | - | 4.99 | 1,243,441 |
| Countries of Europe - One Minute Sprint | 0 | - | 4.94 | 1,328,327 |
| 10 Biggest European Countries by Area | 0 | - | 4.99 | 192,626 |
| 10 Westernmost Countries in Europe | 0 | - | 4.96 | 151,168 |
| Top 10 Languages Spoken in Europe | 0 | - | 4.96 | 218,614 |
| European Landmarks Map Quiz | 0 | - | 4.97 | 87,122 |
| Countries of Europe in 1650 with a Map | 0 | - | 4.95 | 69,117 |
| Countries with Territory in the Balkans | 0 | - | 4.96 | 89,241 |
| Eastern Europe Map Quiz | 0 | - | 4.91 | 128,156 |
| Slavic Countries | 0 | - | 4.96 | 111,622 |
| Flags of Countries That Border Russia | 0 | - | 4.70 | 70,590 |
| Countries Closest to Germany A-Z | 0 | - | 4.98 | 27,291 |
| States of the German Confederation in 1848 | 0 | - | 4.89 | 31,983 |
| UK Cities Map Quiz | 0 | - | 4.96 | 464,451 |
| Counties of England | 0 | - | 4.97 | 796,391 |
| Invasions of Great Britain | 0 | - | 4.51 | 59,855 |
| Places Where Winston Churchill Said We Would Fight the Nazis | 0 | - | 4.57 | 14,606 |
| Countries of the Mongol Empire on a Map | 0 | - | 4.99 | 106,816 |
| Top 10 Biggest Economies in Africa | 0 | - | 4.99 | 120,564 |
| Category Elimination - African Geography #1 | 0 | - | 4.90 | 92,308 |
| Prime Ministers of Australia | 0 | - | 4.50 | 31,928 |
| Top 10 Biggest Economies in the Americas | 0 | - | 4.94 | 92,143 |
| U.S. Citizenship Test Questions | 0 | - | 4.83 | 239,404 |
| U.S. Federal Agency Acronyms | 0 | - | 4.50 | 79,973 |
| European Diaspora - Top 11 Countries | 0 | - | 4.90 | 95,820 |
| 10 European Countries with the Most Tourists | 0 | - | 4.98 | 137,480 |
| Three Band Flags of Europe | 0 | - | 4.98 | 193,245 |
| Catholic Countries in Europe | 0 | - | 4.83 | 95,090 |
| Pixelated Europe Map | 0 | - | 4.88 | 122,710 |
| European Countries with One Border | 0 | - | 4.97 | 182,732 |
| European Countries with the Fewest Borders | 0 | - | 4.97 | 179,531 |
| Category Elimination - European Geography #1 | 0 | - | 4.98 | 233,155 |
| Category Elimination - European Geography #2 | 0 | - | 4.99 | 167,059 |
| Name a Valid European Country #1 | 0 | - | 4.99 | 260,828 |
| Name a Valid European Country #2 | 0 | - | 4.94 | 114,653 |
| European Capital Superlatives - Top 2 | 0 | - | 4.95 | 81,137 |
| Russia Country Quiz | 0 | - | 4.85 | 114,445 |
| Russia A-Z | 0 | - | 4.46 | 27,236 |
| Countries That Border Russia | 0 | - | 4.98 | 461,630 |
| Arms Exports - Russia | 0 | - | 4.48 | 25,132 |
| Croatia Country Quiz | 0 | - | 4.83 | 43,321 |
| Countries Formerly in Yugoslavia | 0 | - | 4.95 | 124,871 |
| Bosnia and Herzegovina Country Quiz | 0 | - | 4.86 | 35,332 |
| Andorra Country Quiz | 0 | - | 4.90 | 31,673 |
| Regions of France Map Quiz | 0 | - | 4.97 | 144,371 |
| France Cities Map Quiz | 0 | - | 4.96 | 166,701 |
| Countries Bordering France | 0 | - | 4.83 | 402,443 |
| Germany Country Quiz | 0 | - | 4.82 | 157,806 |
| States of Germany Map Quiz | 0 | - | 4.91 | 132,764 |
| Germany Cities Map Quiz | 0 | - | 4.87 | 126,301 |
| Countries Bordering Germany | 0 | - | 4.99 | 369,309 |
| Italy Country Quiz | 0 | - | 4.82 | 123,376 |
| Regions of Italy Map Quiz | 0 | - | 4.96 | 149,317 |
| Italy Cities Map Quiz | 0 | - | 4.97 | 152,001 |
| Countries Italy Declared War On | 0 | - | 4.75 | 43,317 |
| Spain Cities Map Quiz | 0 | - | 4.87 | 96,898 |
| Regions of Spain Map Quiz | 0 | - | 4.95 | 185,618 |
| Biggest Spanish Empire Countries | 0 | - | 4.91 | 115,949 |
| UK Immigration by Country | 0 | - | 4.94 | 140,863 |
| United Kingdom Country Quiz | 0 | - | 4.96 | 139,733 |
| Countries and Territories of the United Kingdom | 0 | - | 4.89 | 93,976 |
| Counties of England Map Quiz | 0 | - | 4.97 | 307,570 |
| Wives of King Henry VIII | 0 | - | 4.55 | 53,347 |
| English Royal Consorts | 0 | - | 4.37 | 37,345 |
| Countries the UK Declared War On | 0 | - | 4.61 | 122,445 |
| Geography of the British Empire | 0 | - | 4.48 | 39,667 |
| Medieval English History | 0 | - | 4.53 | 43,501 |
| All UK Parliament Constituencies on a Map | 0 | - | 4.60 | 28,802 |
| Name the Popes Quiz | 0 | - | 4.47 | 138,150 |
| Countries of the Popes | 0 | - | 4.79 | 128,081 |
| Top 10 Coldest Asian Countries | 0 | - | 4.95 | 122,949 |
| Top 10 Biggest Economies in Asia | 0 | - | 4.87 | 134,183 |
| Monarchies of Asia | 0 | - | 4.97 | 71,075 |
| Category Elimination - Asian Geography #1 | 0 | - | 4.86 | 109,973 |
| Category Elimination - Asian Geography #2 | 0 | - | 4.94 | 96,766 |
| Asian Country Superlatives | 0 | - | 4.84 | 80,871 |
| Countries in World War II | 0 | - | 4.54 | 912,375 |
| Political Movements by Country | 0 | - | 4.46 | 72,521 |
| Battle to Country | 0 | - | 4.91 | 53,299 |
| Hindu Countries | 0 | - | 4.86 | 50,123 |
| Top 10 Richest Countries in Africa | 0 | - | 4.85 | 76,250 |
| Top 10 Richest Countries in the Americas | 0 | - | 4.93 | 83,923 |
| All U.S. Supreme Court Justices | 0 | - | 4.54 | 29,071 |
| All U.S. Supreme Court Justices Ever | 0 | - | 4.50 | 11,790 |
| The American Civil War | 0 | - | 4.62 | 52,412 |
| Countries That Touch the Adriatic Sea | 0 | - | 4.96 | 71,096 |
| Most Guessed European Capitals | 0 | - | 4.87 | 101,503 |
| Top 10 European Countries by Coastline | 0 | - | 4.87 | 138,365 |
| Countries that Border Poland | 0 | - | 4.99 | 172,241 |
| Countries that Bordered the USSR | 0 | - | 4.93 | 165,346 |
| Non-Bordering Countries Closest to Russia | 0 | - | 4.91 | 82,831 |
| Biggest Trading Partners - Russia | 0 | - | 4.55 | 36,506 |
| Countries that Beat Russia | 0 | - | 4.81 | 82,752 |
| Countries With the Most Russian Speakers | 0 | - | 4.97 | 100,731 |
| Countries that Border Hungary | 0 | - | 4.98 | 104,200 |
| Countries Bordering Serbia | 0 | - | 4.96 | 92,376 |
| Countries Bordering Austria | 0 | - | 4.97 | 118,296 |
| Modern Day Countries of Austria-Hungary on a Map | 0 | - | 4.98 | 103,727 |
| Countries that Visit France the Most | 0 | - | 4.85 | 45,859 |
| Countries Closest to Metropolitan France | 0 | - | 4.89 | 72,165 |
| Germany A-Z | 0 | - | 4.56 | 62,596 |
| Countries that Beat Germany | 0 | - | 4.94 | 106,368 |
| Countries With the Most German Speakers | 0 | - | 4.89 | 96,586 |
| The Trojan War | 0 | - | 4.83 | 39,717 |
| Letters of the Greek Alphabet | 0 | - | 4.97 | 647,184 |
| Name that Greek Letter | 0 | - | 4.93 | 323,380 |
| Greek Mythology General Knowledge #1 | 0 | - | 4.85 | 111,794 |
| Counties of Ireland | 0 | - | 4.92 | 195,154 |
| Italy A-Z | 0 | - | 4.49 | 58,282 |
| Countries Bordering Italy | 0 | - | 4.94 | 100,848 |
| Countries that Beat Italy | 0 | - | 4.85 | 54,468 |
| Countries Closest to Italy | 0 | - | 4.97 | 197,994 |
| Ancient Roman Trivia #1 | 0 | - | 4.85 | 84,512 |
| Roman Emperors | 0 | - | 4.95 | 119,981 |
| Countries Closest to Iceland | 0 | - | 4.90 | 73,558 |
| Countries that Beat Portugal | 0 | - | 4.86 | 59,312 |
| Geography of the Spanish Empire | 0 | - | 4.49 | 37,158 |
| Countries Closest to Spain | 0 | - | 4.96 | 226,921 |
| Countries that Beat Spain | 0 | - | 4.94 | 62,917 |
| Countries that Visit the UK the Most | 0 | - | 4.87 | 75,080 |
| The United States... or the United Kingdom? | 0 | - | 4.87 | 98,514 |
| Counties of the UK and Ireland | 0 | - | 4.98 | 130,626 |
| Monty Python Quotes | 0 | - | 4.88 | 42,461 |
| The Reign of Henry VIII | 0 | - | 4.25 | 27,748 |
| English First Names of the Middle Ages | 0 | - | 4.47 | 60,655 |
| British History Multiple Choice #1 | 0 | - | 4.46 | 55,138 |
| British History Multiple Choice #2 | 0 | - | 4.42 | 37,952 |
| British History Quiz for Dummies | 0 | - | 4.70 | 78,576 |
| Elizabeth I... or Elizabeth II? | 0 | - | 4.30 | 24,498 |
| The Reign of Queen Elizabeth II | 0 | - | 4.36 | 35,833 |
| The Life of Winston Churchill | 0 | - | 4.16 | 11,844 |
| World Capitals Closest to London | 0 | - | 4.88 | 110,631 |
| 50 Busiest Air Routes from London | 0 | - | 4.87 | 96,814 |
| 2025–2026 Football League Teams | 0 | - | 4.94 | 401,194 |
| National Founders | 0 | - | 4.40 | 83,833 |
| Important Cities in WWII | 0 | - | 4.42 | 93,451 |
| Countries with the Most Hindus | 0 | - | 4.90 | 122,997 |
| Random Sequential Oceanic Countries on a Map | 0 | - | 4.97 | 27,159 |
| Biggest Trading Partners - Colombia | 0 | - | 4.88 | 40,300 |
| Names of Generations | 0 | - | 4.09 | 44,827 |
| Countries Closest to United States A-Z | 0 | - | 4.82 | 118,126 |
| U.S. States by Governor | 0 | - | 4.43 | 18,060 |
| U.S. Political Parties in History | 0 | - | 4.44 | 27,690 |
| The U.S. Government - How Does it Work? | 0 | - | 4.34 | 42,355 |
| U.S. Government Agencies | 0 | - | 4.44 | 19,673 |
| U.S. Presidential Trivia #1 | 0 | - | 4.45 | 108,689 |
| U.S. Presidents by Event | 0 | - | 4.58 | 34,449 |
| Losing U.S. Presidential Candidates in History | 0 | - | 4.61 | 93,771 |
| Presidential Middle Names | 0 | - | 4.41 | 60,215 |
| U.S. Presidential Trivia #2 | 0 | - | 4.49 | 53,312 |
| Assassinated U.S. Presidents | 0 | - | 4.63 | 94,578 |
| U.S. Presidents Who Died in Office | 0 | - | 4.77 | 34,980 |
| Ten Least Guessed U.S. Presidents | 0 | - | 4.45 | 38,416 |
| 100 Most Influential Figures in U.S. History | 0 | - | 4.20 | 45,040 |
| Top 10 Coldest U.S. States | 0 | - | 4.94 | 124,624 |
| Top 10 Hottest U.S. States | 0 | - | 4.86 | 125,607 |
| Top 10 U.S. States with the Least Precipitation | 0 | - | 4.82 | 61,889 |
| Anglo-Saxon and Viking Kings of England | 0 | - | 4.74 | 12,207 |
