| The Dictator Files: Vladimir Lenin | 0 | - | 4.45 | 26,866 |
| Countries Invaded by the USSR | 0 | - | 4.29 | 94,161 |
| Name the English Monarchs | 0 | - | 4.91 | 504,027 |
| Monarchies of Europe | 0 | - | 4.90 | 98,359 |
| Countries of Europe in 1815 With a Map | 0 | - | 4.99 | 150,767 |
| Countries of Europe in 1848 | 0 | - | 4.98 | 83,499 |
| Countries of Europe in 1870 with a Map | 0 | - | 4.95 | 65,117 |
| Every Country of Europe Since 1815 With a Map | 0 | - | 4.98 | 71,335 |
| Countries of Europe in 1360 with a Map | 0 | - | 4.99 | 57,151 |
| U.S. Cabinet Departments | 0 | - | 4.86 | 72,943 |
| U.S. Presidents Quiz | 0 | - | 5.00 | 3,708,965 |
| Top 10 Coldest European Countries | 0 | - | 4.94 | 193,369 |
| Top 10 Hottest European Countries | 0 | - | 4.88 | 127,274 |
| European Secessionist Movements on a Map | 0 | - | 4.53 | 35,056 |
| Top 10 Biggest Economies in Europe | 0 | - | 4.98 | 199,822 |
| Biggest Trading Partners - Russia | 0 | - | 4.55 | 36,551 |
| Modern-Day Countries of the British Empire in 1921 | 0 | - | 4.99 | 118,002 |
| Communist Countries in History | 0 | - | 4.63 | 496,580 |
| Deadliest U.S. Wars | 0 | - | 4.89 | 191,132 |
| Europe Map Quiz | 0 | - | 5.00 | 4,771,707 |
| Top 10 Richest Countries in Europe | 0 | - | 4.90 | 150,024 |
| Biggest Trading Partners - European Union | 0 | - | 4.91 | 72,962 |
| Category Elimination - European Countries #1 | 0 | - | 4.89 | 90,385 |
| Countries that Bordered the USSR | 0 | - | 4.93 | 165,661 |
| Countries With the Most Russian Speakers | 0 | - | 4.97 | 101,537 |
| Prime Ministers of the UK | 0 | - | 4.95 | 440,131 |
| Axis Occupied Countries of WWII | 0 | - | 4.99 | 229,403 |
| Countries in World War I | 0 | - | 4.88 | 228,495 |
| U.S. Presidents by Picture | 0 | - | 4.87 | 427,101 |
| Canadian Prime Ministers | 0 | - | 4.63 | 57,651 |
| Russia A-Z | 0 | - | 4.46 | 27,268 |
| Countries Closest to Spain A-Z | 0 | - | 4.98 | 108,427 |
| Countries Closest to the United Kingdom A-Z | 0 | - | 4.96 | 191,129 |
| The Reign of Queen Elizabeth I | 0 | - | 4.53 | 31,848 |
| Houses of British Monarchs | 0 | - | 4.53 | 65,783 |
| Zone 1 London Underground Stations - With a Map | 0 | - | 4.90 | 52,501 |
| First Names of U.S. Presidents | 0 | - | 4.86 | 382,345 |
| Name a Valid U.S. President #1 | 0 | - | 4.89 | 192,635 |
| Play-Doh Presidents | 0 | - | 5.00 | 82,486 |
| Countries That Use the Euro | 0 | - | 4.95 | 105,609 |
| Flags of Europe Quiz | 0 | - | 4.99 | 1,248,844 |
| Europe Cities Map Quiz | 0 | - | 4.99 | 365,074 |
| Countries of Europe - One Minute Sprint | 0 | - | 4.94 | 1,330,874 |
| 10 Easternmost Countries in Europe | 0 | - | 4.89 | 115,714 |
| The Only European Country ... | 0 | - | 4.91 | 217,431 |
| European Countries NOT in NATO | 0 | - | 4.90 | 61,602 |
| Counties of England | 0 | - | 4.97 | 799,010 |
| Invasions of Great Britain | 0 | - | 4.51 | 59,959 |
| British History A-Z #1 | 0 | - | 4.45 | 46,585 |
| Places Where Winston Churchill Said We Would Fight the Nazis | 0 | - | 4.57 | 14,621 |
| U.S. Citizenship Test Questions | 0 | - | 4.83 | 239,764 |
| 10 Biggest European Countries by Area | 0 | - | 4.99 | 192,949 |
| 10 Westernmost Countries in Europe | 0 | - | 4.96 | 151,451 |
| European Diaspora - Top 11 Countries | 0 | - | 4.90 | 96,055 |
| Top 10 Languages Spoken in Europe | 0 | - | 4.96 | 219,421 |
| 10 European Countries with the Most Tourists | 0 | - | 4.98 | 137,869 |
| European Landmarks Map Quiz | 0 | - | 4.97 | 87,369 |
| Three Band Flags of Europe | 0 | - | 4.98 | 193,739 |
| Catholic Countries in Europe | 0 | - | 4.83 | 95,398 |
| Pixelated Europe Map | 0 | - | 4.88 | 123,003 |
| European Countries with One Border | 0 | - | 4.97 | 183,137 |
| European Countries with the Fewest Borders | 0 | - | 4.97 | 179,908 |
| Countries of Europe in 1650 with a Map | 0 | - | 4.95 | 69,661 |
| Countries with Territory in the Balkans | 0 | - | 4.96 | 89,574 |
| Eastern Europe Map Quiz | 0 | - | 4.91 | 128,421 |
| Slavic Countries | 0 | - | 4.96 | 111,898 |
| Russia by Picture | 0 | - | 4.41 | 20,433 |
| Soviet Leaders 1917–1991 | 0 | - | 4.44 | 95,202 |
| Countries Formerly in Yugoslavia | 0 | - | 4.95 | 125,106 |
| Regions of France Map Quiz | 0 | - | 4.97 | 144,867 |
| States of Germany Map Quiz | 0 | - | 4.92 | 133,228 |
| Countries Closest to Germany A-Z | 0 | - | 4.98 | 27,388 |
| States of the German Confederation in 1848 | 0 | - | 4.90 | 32,203 |
| UK Cities Map Quiz | 0 | - | 4.96 | 465,196 |
| Countries and Territories of the United Kingdom | 0 | - | 4.90 | 94,168 |
| Counties of England Map Quiz | 0 | - | 4.97 | 308,188 |
| Wives of King Henry VIII | 0 | - | 4.55 | 53,406 |
| English Royal Consorts | 0 | - | 4.38 | 37,416 |
| Countries the UK Declared War On | 0 | - | 4.55 | 122,677 |
| Geography of the British Empire | 0 | - | 4.48 | 39,735 |
| All UK Parliament Constituencies on a Map | 0 | - | 4.60 | 28,904 |
| Name the Popes Quiz | 0 | - | 4.47 | 138,442 |
| Countries of the Popes | 0 | - | 4.79 | 128,352 |
| Monarchies of Asia | 0 | - | 4.97 | 71,230 |
| Asian Country Superlatives | 0 | - | 4.84 | 81,031 |
| Countries in World War II | 0 | - | 4.55 | 914,904 |
| Political Movements by Country | 0 | - | 4.46 | 72,624 |
| Battle to Country | 0 | - | 4.91 | 53,544 |
| Prime Ministers of Australia | 0 | - | 4.50 | 32,012 |
| Top 10 Richest Countries in the Americas | 0 | - | 4.93 | 84,470 |
| Top 10 Biggest Economies in the Americas | 0 | - | 4.94 | 92,392 |
| U.S. Federal Agency Acronyms | 0 | - | 4.50 | 80,039 |
| All U.S. Supreme Court Justices | 0 | - | 4.54 | 29,107 |
| All U.S. Supreme Court Justices Ever | 0 | - | 4.50 | 11,830 |
| Red State or Blue State Trait? | 0 | - | 4.42 | 55,475 |
| Countries That Touch the Adriatic Sea | 0 | - | 4.96 | 71,191 |
| Most Guessed European Capitals | 0 | - | 4.87 | 101,596 |
| Top 10 European Countries by Coastline | 0 | - | 4.87 | 138,523 |
| Category Elimination - European Geography #1 | 0 | - | 4.98 | 233,949 |
| Category Elimination - European Geography #2 | 0 | - | 4.99 | 167,655 |
| Name a Valid European Country #1 | 0 | - | 4.99 | 262,169 |
| Name a Valid European Country #2 | 0 | - | 4.94 | 115,062 |
| European Capital Superlatives - Top 2 | 0 | - | 4.95 | 81,302 |
| Countries that Border Poland | 0 | - | 4.99 | 172,623 |
| Russia Country Quiz | 0 | - | 4.83 | 114,707 |
| Countries That Border Russia | 0 | - | 4.98 | 462,861 |
| Non-Bordering Countries Closest to Russia | 0 | - | 4.91 | 82,995 |
| Arms Exports - Russia | 0 | - | 4.49 | 25,152 |
| Croatia Country Quiz | 0 | - | 4.83 | 43,472 |
| Countries that Border Hungary | 0 | - | 4.98 | 104,441 |
| Bosnia and Herzegovina Country Quiz | 0 | - | 4.86 | 35,417 |
| Countries Bordering Serbia | 0 | - | 4.96 | 92,675 |
| Andorra Country Quiz | 0 | - | 4.91 | 31,780 |
| Countries Bordering Austria | 0 | - | 4.97 | 118,668 |
| France Cities Map Quiz | 0 | - | 4.96 | 167,180 |
| Countries that Visit France the Most | 0 | - | 4.85 | 45,969 |
| Countries Closest to Metropolitan France | 0 | - | 4.89 | 72,287 |
| Countries Bordering France | 0 | - | 4.83 | 403,586 |
| Germany Country Quiz | 0 | - | 4.83 | 158,196 |
| Germany Cities Map Quiz | 0 | - | 4.87 | 126,641 |
| Countries Bordering Germany | 0 | - | 4.99 | 370,719 |
| Countries With the Most German Speakers | 0 | - | 4.89 | 97,395 |
| Letters of the Greek Alphabet | 0 | - | 4.97 | 648,960 |
| Name that Greek Letter | 0 | - | 4.93 | 324,194 |
| Counties of Ireland | 0 | - | 4.92 | 196,081 |
| Regions of Italy Map Quiz | 0 | - | 4.96 | 149,670 |
| Italy Cities Map Quiz | 0 | - | 4.97 | 152,617 |
| Countries Bordering Italy | 0 | - | 4.94 | 101,028 |
| Countries Italy Declared War On | 0 | - | 4.75 | 43,426 |
| Countries Closest to Italy | 0 | - | 4.97 | 198,366 |
| Spain Cities Map Quiz | 0 | - | 4.87 | 97,123 |
| Regions of Spain Map Quiz | 0 | - | 4.95 | 186,239 |
| Biggest Spanish Empire Countries | 0 | - | 4.91 | 116,274 |
| Geography of the Spanish Empire | 0 | - | 4.49 | 37,221 |
| Countries Closest to Spain | 0 | - | 4.96 | 227,379 |
| UK Immigration by Country | 0 | - | 4.94 | 141,177 |
| United Kingdom Country Quiz | 0 | - | 4.96 | 140,199 |
| Countries that Visit the UK the Most | 0 | - | 4.87 | 75,390 |
| Counties of the UK and Ireland | 0 | - | 4.98 | 131,297 |
| Medieval English History | 0 | - | 4.53 | 43,574 |
| British History Multiple Choice #1 | 0 | - | 4.46 | 55,210 |
| British History Multiple Choice #2 | 0 | - | 4.42 | 38,002 |
| The Reign of Queen Elizabeth II | 0 | - | 4.36 | 35,887 |
| World Capitals Closest to London | 0 | - | 4.88 | 110,807 |
| 50 Busiest Air Routes from London | 0 | - | 4.87 | 97,014 |
| 2025–2026 Football League Teams | 0 | - | 4.94 | 402,798 |
| Top 10 Coldest Asian Countries | 0 | - | 4.95 | 123,515 |
| Top 10 Biggest Economies in Asia | 0 | - | 4.87 | 135,564 |
| Category Elimination - Asian Geography #1 | 0 | - | 4.86 | 110,361 |
| Category Elimination - Asian Geography #2 | 0 | - | 4.94 | 97,103 |
| Countries of the Mongol Empire on a Map | 0 | - | 4.99 | 107,102 |
| Top 10 Richest Countries in Africa | 0 | - | 4.85 | 76,439 |
| Top 10 Biggest Economies in Africa | 0 | - | 4.99 | 120,823 |
| Category Elimination - African Geography #1 | 0 | - | 4.90 | 92,617 |
| Important Cities in WWII | 0 | - | 4.42 | 93,615 |
| U.S. States by Governor | 0 | - | 4.43 | 18,079 |
| U.S. Political Parties in History | 0 | - | 4.44 | 27,717 |
| The U.S. Government - How Does it Work? | 0 | - | 4.34 | 42,401 |
| U.S. Government Agencies | 0 | - | 4.44 | 19,712 |
| U.S. Presidential Trivia #1 | 0 | - | 4.45 | 108,940 |
| U.S. Presidents by Event | 0 | - | 4.58 | 34,732 |
| Losing U.S. Presidential Candidates in History | 0 | - | 4.61 | 94,012 |
| Presidential Middle Names | 0 | - | 4.41 | 60,419 |
| U.S. Presidential Trivia #2 | 0 | - | 4.49 | 53,458 |
| Assassinated U.S. Presidents | 0 | - | 4.63 | 94,671 |
| Ten Least Guessed U.S. Presidents | 0 | - | 4.45 | 38,488 |
| 100 Most Influential Figures in U.S. History | 0 | - | 4.20 | 45,124 |
| The American Civil War | 0 | - | 4.62 | 52,505 |
| Top 10 Coldest U.S. States | 0 | - | 4.94 | 125,331 |
| Top 10 Hottest U.S. States | 0 | - | 4.86 | 125,967 |
| Top 10 U.S. States with the Least Precipitation | 0 | - | 4.82 | 62,012 |
| Anglo-Saxon and Viking Kings of England | 0 | - | 4.74 | 12,270 |
| Biggest Countries in Europe in 1700 | 0 | - | 4.73 | 58,590 |
| Random European Flag to Country | 0 | - | 4.89 | 182,996 |
| Flags of Countries That Border Russia | 0 | - | 4.70 | 83,240 |
| Countries that Beat Russia | 0 | - | 4.81 | 83,073 |
| Countries Bordering Ukraine, with an Empty Map | 0 | - | 4.86 | 96,547 |
| North Macedonia Country Quiz | 0 | - | 4.81 | 27,928 |
| Moldova Country Quiz | 0 | - | 4.82 | 30,885 |
| Modern Day Countries of Austria-Hungary on a Map | 0 | - | 4.98 | 104,102 |
| The Reign of Napoleon | 0 | - | 4.54 | 39,029 |
| Germany A-Z | 0 | - | 4.56 | 62,701 |
| Biggest Trading Partners - Germany | 0 | - | 4.97 | 71,682 |
| Countries that Beat Germany | 0 | - | 4.94 | 106,748 |
| Olympian Gods Quiz | 0 | - | 4.96 | 501,951 |
| The Trojan War | 0 | - | 4.83 | 39,802 |
| Greek Mythology General Knowledge #1 | 0 | - | 4.85 | 112,267 |
| 101 Figures from Greek Mythology | 0 | - | 4.99 | 126,529 |
| Italy A-Z | 0 | - | 4.49 | 58,448 |
| The Dictator Files: Benito Mussolini | 0 | - | 4.65 | 23,495 |
| Countries that Beat Italy | 0 | - | 4.85 | 54,658 |
| Ancient Roman Trivia #1 | 0 | - | 4.85 | 84,657 |
| Roman Emperors | 0 | - | 4.95 | 120,417 |
| Countries Closest to Iceland | 0 | - | 4.90 | 73,751 |
| Countries that Beat Iceland | 0 | - | 4.81 | 42,992 |
| Countries that Beat Portugal | 0 | - | 4.86 | 59,519 |
| Biggest Trading Partners - Spain | 0 | - | 4.92 | 53,854 |
| Countries that Beat Spain | 0 | - | 4.94 | 63,076 |
| The United States... or the United Kingdom? | 0 | - | 4.87 | 98,747 |
| Monty Python Quotes | 0 | - | 4.89 | 42,512 |
