| The Dictator Files: Vladimir Lenin | 0 | - | 4.45 | 26,622 |
| Countries of the Soviet Union | 0 | - | 4.98 | 193,749 |
| Soviet Leaders 1917–1991 | 0 | - | 4.43 | 94,388 |
| Name the English Monarchs | 0 | - | 4.92 | 497,605 |
| Countries Invaded by the USSR | 0 | - | 4.29 | 93,504 |
| Monarchies of Europe | 0 | - | 4.90 | 97,251 |
| Countries of Europe in 1815 With a Map | 0 | - | 4.99 | 148,836 |
| Countries of Europe in 1848 | 0 | - | 4.98 | 75,340 |
| Countries of Europe in 1870 with a Map | 0 | - | 4.95 | 63,300 |
| Every Country of Europe Since 1815 With a Map | 0 | - | 4.98 | 70,036 |
| Countries of Europe in 1360 with a Map | 0 | - | 4.99 | 55,948 |
| U.S. Cabinet Departments | 0 | - | 4.86 | 72,498 |
| U.S. Presidents Quiz | 0 | - | 5.00 | 3,650,707 |
| Top 10 Coldest European Countries | 0 | - | 4.94 | 192,193 |
| Top 10 Hottest European Countries | 0 | - | 4.89 | 126,066 |
| European Secessionist Movements on a Map | 0 | - | 4.53 | 34,726 |
| Top 10 Biggest Economies in Europe | 0 | - | 4.98 | 197,154 |
| Modern-Day Countries of the British Empire in 1921 | 0 | - | 4.99 | 116,166 |
| Communist Countries in History | 0 | - | 4.63 | 492,255 |
| Deadliest U.S. Wars | 0 | - | 4.89 | 189,169 |
| Europe Map Quiz | 0 | - | 5.00 | 4,728,917 |
| Top 10 Richest Countries in Europe | 0 | - | 4.91 | 148,089 |
| Biggest Trading Partners - European Union | 0 | - | 4.91 | 72,065 |
| Category Elimination - European Countries #1 | 0 | - | 4.89 | 88,906 |
| Prime Ministers of the UK | 0 | - | 4.96 | 434,342 |
| Canadian Prime Ministers | 0 | - | 4.63 | 56,996 |
| Zone 1 London Underground Stations - With a Map | 0 | - | 4.90 | 51,920 |
| Axis Occupied Countries of WWII | 0 | - | 4.99 | 227,306 |
| Countries in World War I | 0 | - | 4.88 | 226,506 |
| U.S. Presidents by Picture | 0 | - | 4.87 | 423,430 |
| First Names of U.S. Presidents | 0 | - | 4.85 | 379,423 |
| Countries That Use the Euro | 0 | - | 4.96 | 102,830 |
| Europe Cities Map Quiz | 0 | - | 4.99 | 362,162 |
| 10 Easternmost Countries in Europe | 0 | - | 4.89 | 113,419 |
| The Only European Country ... | 0 | - | 4.91 | 213,623 |
| European Countries NOT in NATO | 0 | - | 4.87 | 59,407 |
| Countries Closest to Spain A-Z | 0 | - | 4.99 | 107,636 |
| Countries Closest to the United Kingdom A-Z | 0 | - | 4.96 | 189,832 |
| British History A-Z #1 | 0 | - | 4.45 | 45,777 |
| Houses of British Monarchs | 0 | - | 4.53 | 65,269 |
| Name a Valid U.S. President #1 | 0 | - | 4.89 | 189,686 |
| Play-Doh Presidents | 0 | - | 5.00 | 81,632 |
| Flags of Europe Quiz | 0 | - | 4.99 | 1,225,147 |
| Countries of Europe - One Minute Sprint | 0 | - | 4.94 | 1,319,080 |
| 10 Biggest European Countries by Area | 0 | - | 4.99 | 191,635 |
| 10 Westernmost Countries in Europe | 0 | - | 4.96 | 150,234 |
| Top 10 Languages Spoken in Europe | 0 | - | 4.96 | 216,160 |
| European Landmarks Map Quiz | 0 | - | 4.97 | 86,428 |
| Countries of Europe in 1650 with a Map | 0 | - | 4.95 | 67,237 |
| Countries with Territory in the Balkans | 0 | - | 4.96 | 88,192 |
| Eastern Europe Map Quiz | 0 | - | 4.91 | 127,095 |
| Slavic Countries | 0 | - | 4.96 | 110,801 |
| Flags of Countries That Border Russia | 0 | - | 4.70 | 70,144 |
| Countries Closest to Germany A-Z | 0 | - | 4.98 | 26,915 |
| UK Cities Map Quiz | 0 | - | 4.95 | 462,010 |
| Counties of England | 0 | - | 4.97 | 788,691 |
| Invasions of Great Britain | 0 | - | 4.51 | 59,368 |
| Places Where Winston Churchill Said We Would Fight the Nazis | 0 | - | 4.57 | 14,544 |
| Countries of the Mongol Empire on a Map | 0 | - | 4.99 | 105,763 |
| Top 10 Biggest Economies in Africa | 0 | - | 4.99 | 119,326 |
| Category Elimination - African Geography #1 | 0 | - | 4.90 | 91,020 |
| Prime Ministers of Australia | 0 | - | 4.50 | 31,658 |
| Top 10 Biggest Economies in the Americas | 0 | - | 4.94 | 91,031 |
| U.S. Citizenship Test Questions | 0 | - | 4.83 | 238,236 |
| U.S. Federal Agency Acronyms | 0 | - | 4.50 | 79,719 |
| European Diaspora - Top 11 Countries | 0 | - | 4.90 | 94,989 |
| 10 European Countries with the Most Tourists | 0 | - | 4.98 | 136,275 |
| Three Band Flags of Europe | 0 | - | 4.98 | 191,750 |
| Catholic Countries in Europe | 0 | - | 4.83 | 94,155 |
| Pixelated Europe Map | 0 | - | 4.88 | 121,725 |
| European Countries with One Border | 0 | - | 4.97 | 181,521 |
| European Countries with the Fewest Borders | 0 | - | 4.97 | 178,178 |
| Category Elimination - European Geography #1 | 0 | - | 4.98 | 230,341 |
| Category Elimination - European Geography #2 | 0 | - | 4.99 | 165,007 |
| Name a Valid European Country #1 | 0 | - | 4.99 | 256,462 |
| Name a Valid European Country #2 | 0 | - | 4.94 | 113,120 |
| European Capital Superlatives - Top 2 | 0 | - | 4.94 | 80,630 |
| Russia Country Quiz | 0 | - | 4.85 | 113,594 |
| Russia A-Z | 0 | - | 4.46 | 27,129 |
| Countries That Border Russia | 0 | - | 4.98 | 458,693 |
| Arms Exports - Russia | 0 | - | 4.48 | 24,759 |
| Croatia Country Quiz | 0 | - | 4.83 | 42,809 |
| Countries Formerly in Yugoslavia | 0 | - | 4.95 | 124,131 |
| Bosnia and Herzegovina Country Quiz | 0 | - | 4.86 | 35,010 |
| Regions of France Map Quiz | 0 | - | 4.97 | 143,044 |
| France Cities Map Quiz | 0 | - | 4.96 | 165,110 |
| Countries Bordering France | 0 | - | 4.85 | 397,951 |
| Germany Country Quiz | 0 | - | 4.82 | 156,460 |
| States of Germany Map Quiz | 0 | - | 4.91 | 131,607 |
| Germany Cities Map Quiz | 0 | - | 4.87 | 125,079 |
| Countries Bordering Germany | 0 | - | 4.99 | 366,850 |
| States of the German Confederation in 1848 | 0 | - | 4.89 | 31,500 |
| Italy Country Quiz | 0 | - | 4.82 | 122,125 |
| Regions of Italy Map Quiz | 0 | - | 4.96 | 148,309 |
| Italy Cities Map Quiz | 0 | - | 4.97 | 151,011 |
| Countries Italy Declared War On | 0 | - | 4.75 | 42,921 |
| Spain Cities Map Quiz | 0 | - | 4.87 | 95,906 |
| Regions of Spain Map Quiz | 0 | - | 4.95 | 184,555 |
| Biggest Spanish Empire Countries | 0 | - | 4.91 | 114,704 |
| UK Immigration by Country | 0 | - | 4.94 | 139,527 |
| United Kingdom Country Quiz | 0 | - | 4.96 | 138,044 |
| Countries and Territories of the United Kingdom | 0 | - | 4.89 | 92,867 |
| Counties of England Map Quiz | 0 | - | 4.97 | 306,006 |
| Wives of King Henry VIII | 0 | - | 4.55 | 53,159 |
| English Royal Consorts | 0 | - | 4.37 | 37,150 |
| Countries the UK Declared War On | 0 | - | 4.61 | 121,730 |
| Geography of the British Empire | 0 | - | 4.48 | 39,466 |
| The Reign of Queen Elizabeth I | 0 | - | 4.53 | 31,596 |
| Medieval English History | 0 | - | 4.53 | 43,299 |
| All UK Parliament Constituencies on a Map | 0 | - | 4.60 | 28,526 |
| Name the Popes Quiz | 0 | - | 4.47 | 137,025 |
| Countries of the Popes | 0 | - | 4.79 | 127,124 |
| Top 10 Coldest Asian Countries | 0 | - | 4.95 | 122,469 |
| Top 10 Biggest Economies in Asia | 0 | - | 4.85 | 113,188 |
| Monarchies of Asia | 0 | - | 4.97 | 70,560 |
| Category Elimination - Asian Geography #1 | 0 | - | 4.85 | 108,623 |
| Category Elimination - Asian Geography #2 | 0 | - | 4.94 | 95,485 |
| Asian Country Superlatives | 0 | - | 4.83 | 80,405 |
| Countries in World War II | 0 | - | 4.53 | 903,876 |
| Political Movements by Country | 0 | - | 4.46 | 72,241 |
| Battle to Country | 0 | - | 4.91 | 52,469 |
| Hindu Countries | 0 | - | 4.85 | 49,488 |
| Top 10 Richest Countries in Africa | 0 | - | 4.85 | 75,143 |
| Top 10 Richest Countries in the Americas | 0 | - | 4.90 | 76,058 |
| All U.S. Supreme Court Justices | 0 | - | 4.54 | 28,874 |
| All U.S. Supreme Court Justices Ever | 0 | - | 4.49 | 11,667 |
| The American Civil War | 0 | - | 4.62 | 52,110 |
| Countries That Touch the Adriatic Sea | 0 | - | 4.96 | 70,769 |
| Most Guessed European Capitals | 0 | - | 4.87 | 101,164 |
| Top 10 European Countries by Coastline | 0 | - | 4.89 | 137,797 |
| Countries that Border Poland | 0 | - | 4.99 | 171,274 |
| Countries that Bordered the USSR | 0 | - | 4.93 | 164,413 |
| Non-Bordering Countries Closest to Russia | 0 | - | 4.91 | 82,349 |
| Biggest Trading Partners - Russia | 0 | - | 4.55 | 36,323 |
| Countries that Beat Russia | 0 | - | 4.84 | 81,824 |
| Countries With the Most Russian Speakers | 0 | - | 4.97 | 98,276 |
| Countries that Border Hungary | 0 | - | 4.98 | 103,643 |
| Countries Bordering Serbia | 0 | - | 4.96 | 91,682 |
| Countries Bordering Austria | 0 | - | 4.97 | 117,714 |
| Modern Day Countries of Austria-Hungary on a Map | 0 | - | 4.98 | 102,461 |
| Countries that Visit France the Most | 0 | - | 4.85 | 45,492 |
| Countries Closest to Metropolitan France | 0 | - | 4.89 | 71,773 |
| Germany A-Z | 0 | - | 4.56 | 62,292 |
| Countries that Beat Germany | 0 | - | 4.95 | 105,299 |
| Countries With the Most German Speakers | 0 | - | 4.89 | 94,135 |
| The Trojan War | 0 | - | 4.83 | 39,404 |
| Letters of the Greek Alphabet | 0 | - | 4.97 | 641,468 |
| Name that Greek Letter | 0 | - | 4.94 | 321,496 |
| Greek Mythology General Knowledge #1 | 0 | - | 4.85 | 110,435 |
| Counties of Ireland | 0 | - | 4.92 | 192,900 |
| Italy A-Z | 0 | - | 4.49 | 57,658 |
| Countries Bordering Italy | 0 | - | 4.94 | 100,403 |
| Countries that Beat Italy | 0 | - | 4.85 | 53,829 |
| Countries Closest to Italy | 0 | - | 4.97 | 196,215 |
| Ancient Roman Trivia #1 | 0 | - | 4.85 | 84,010 |
| Roman Emperors | 0 | - | 4.95 | 118,359 |
| Countries Closest to Iceland | 0 | - | 4.89 | 72,785 |
| Countries that Beat Portugal | 0 | - | 4.86 | 58,621 |
| Geography of the Spanish Empire | 0 | - | 4.49 | 37,006 |
| Countries Closest to Spain | 0 | - | 4.96 | 225,189 |
| Countries that Beat Spain | 0 | - | 4.94 | 62,427 |
| Countries that Visit the UK the Most | 0 | - | 4.87 | 74,195 |
| The United States... or the United Kingdom? | 0 | - | 4.87 | 97,790 |
| Counties of the UK and Ireland | 0 | - | 4.98 | 128,502 |
| Monty Python Quotes | 0 | - | 4.88 | 42,312 |
| The Reign of Henry VIII | 0 | - | 4.25 | 27,599 |
| English First Names of the Middle Ages | 0 | - | 4.47 | 60,292 |
| British History Multiple Choice #1 | 0 | - | 4.46 | 54,944 |
| British History Multiple Choice #2 | 0 | - | 4.42 | 37,820 |
| British History Quiz for Dummies | 0 | - | 4.70 | 78,057 |
| Elizabeth I... or Elizabeth II? | 0 | - | 4.30 | 24,425 |
| The Reign of Queen Elizabeth II | 0 | - | 4.35 | 35,665 |
| The Life of Winston Churchill | 0 | - | 4.16 | 11,809 |
| World Capitals Closest to London | 0 | - | 4.87 | 109,657 |
| 50 Busiest Air Routes from London | 0 | - | 4.86 | 95,723 |
| 2025–2026 Football League Teams | 0 | - | 4.93 | 396,890 |
| National Founders | 0 | - | 4.40 | 83,632 |
| Important Cities in WWII | 0 | - | 4.42 | 92,848 |
| Countries with the Most Hindus | 0 | - | 4.90 | 122,258 |
| Random Sequential Oceanic Countries on a Map | 0 | - | 4.97 | 26,844 |
| Biggest Trading Partners - Colombia | 0 | - | 4.88 | 39,965 |
| Countries Closest to United States A-Z | 0 | - | 4.81 | 117,354 |
| U.S. States by Governor | 0 | - | 4.43 | 17,977 |
| U.S. Political Parties in History | 0 | - | 4.44 | 27,564 |
| The U.S. Government - How Does it Work? | 0 | - | 4.34 | 42,148 |
| U.S. Government Agencies | 0 | - | 4.44 | 19,539 |
| U.S. Vice Presidents | 0 | - | 4.41 | 134,819 |
| U.S. Presidential Trivia #1 | 0 | - | 4.45 | 107,886 |
| U.S. Presidents by Event | 0 | - | 4.58 | 33,400 |
| Losing U.S. Presidential Candidates in History | 0 | - | 4.61 | 92,942 |
| Presidential Middle Names | 0 | - | 4.41 | 59,659 |
| U.S. Presidential Trivia #2 | 0 | - | 4.49 | 52,690 |
| Assassinated U.S. Presidents | 0 | - | 4.61 | 93,768 |
| U.S. Presidents Who Died in Office | 0 | - | 4.77 | 34,721 |
| Ten Least Guessed U.S. Presidents | 0 | - | 4.45 | 38,149 |
| 100 Most Influential Figures in U.S. History | 0 | - | 4.20 | 44,707 |
| Top 10 Coldest U.S. States | 0 | - | 4.94 | 123,808 |
| Top 10 Hottest U.S. States | 0 | - | 4.86 | 124,587 |
| Top 10 U.S. States with the Least Precipitation | 0 | - | 4.82 | 61,520 |
| Anglo-Saxon and Viking Kings of England | 0 | - | 4.74 | 12,084 |
