| Countries Invaded by the USSR | 0 | - | 4.29 | 93,740 |
| The Dictator Files: Vladimir Lenin | 0 | - | 4.45 | 26,700 |
| Name the English Monarchs | 0 | - | 4.92 | 499,632 |
| Monarchies of Europe | 0 | - | 4.90 | 97,613 |
| Countries of Europe in 1815 With a Map | 0 | - | 4.99 | 149,416 |
| Countries of Europe in 1848 | 0 | - | 4.98 | 75,765 |
| Countries of Europe in 1870 with a Map | 0 | - | 4.95 | 63,868 |
| Every Country of Europe Since 1815 With a Map | 0 | - | 4.98 | 70,413 |
| Countries of Europe in 1360 with a Map | 0 | - | 4.99 | 56,294 |
| U.S. Cabinet Departments | 0 | - | 4.86 | 72,644 |
| U.S. Presidents Quiz | 0 | - | 5.00 | 3,670,104 |
| Top 10 Coldest European Countries | 0 | - | 4.94 | 192,536 |
| Top 10 Hottest European Countries | 0 | - | 4.89 | 126,414 |
| European Secessionist Movements on a Map | 0 | - | 4.53 | 34,825 |
| Top 10 Biggest Economies in Europe | 0 | - | 4.98 | 197,907 |
| Biggest Trading Partners - Russia | 0 | - | 4.55 | 36,395 |
| Modern-Day Countries of the British Empire in 1921 | 0 | - | 4.99 | 116,725 |
| Communist Countries in History | 0 | - | 4.63 | 493,614 |
| Deadliest U.S. Wars | 0 | - | 4.89 | 189,649 |
| Europe Map Quiz | 0 | - | 5.00 | 4,742,475 |
| Top 10 Richest Countries in Europe | 0 | - | 4.90 | 148,639 |
| Biggest Trading Partners - European Union | 0 | - | 4.91 | 72,348 |
| Category Elimination - European Countries #1 | 0 | - | 4.89 | 89,373 |
| Countries With the Most Russian Speakers | 0 | - | 4.97 | 99,332 |
| Prime Ministers of the UK | 0 | - | 4.96 | 436,231 |
| Canadian Prime Ministers | 0 | - | 4.63 | 57,240 |
| Russia A-Z | 0 | - | 4.46 | 27,177 |
| Countries that Bordered the USSR | 0 | - | 4.93 | 164,801 |
| Zone 1 London Underground Stations - With a Map | 0 | - | 4.90 | 52,121 |
| Axis Occupied Countries of WWII | 0 | - | 4.99 | 228,054 |
| Countries in World War I | 0 | - | 4.88 | 227,247 |
| U.S. Presidents by Picture | 0 | - | 4.87 | 424,700 |
| First Names of U.S. Presidents | 0 | - | 4.85 | 380,192 |
| Countries That Use the Euro | 0 | - | 4.95 | 103,724 |
| Europe Cities Map Quiz | 0 | - | 4.99 | 363,038 |
| 10 Easternmost Countries in Europe | 0 | - | 4.89 | 114,158 |
| The Only European Country ... | 0 | - | 4.91 | 214,864 |
| European Countries NOT in NATO | 0 | - | 4.87 | 60,148 |
| States of the Holy Roman Empire in 1356 | 0 | - | 4.97 | 73,010 |
| Countries Closest to Spain A-Z | 0 | - | 4.99 | 107,889 |
| Countries Closest to the United Kingdom A-Z | 0 | - | 4.96 | 190,267 |
| The Reign of Queen Elizabeth I | 0 | - | 4.53 | 31,672 |
| British History A-Z #1 | 0 | - | 4.45 | 46,268 |
| Houses of British Monarchs | 0 | - | 4.53 | 65,436 |
| Name a Valid U.S. President #1 | 0 | - | 4.89 | 190,509 |
| Play-Doh Presidents | 0 | - | 5.00 | 81,884 |
| Flags of Europe Quiz | 0 | - | 4.99 | 1,232,955 |
| Countries of Europe - One Minute Sprint | 0 | - | 4.94 | 1,322,645 |
| 10 Biggest European Countries by Area | 0 | - | 4.99 | 192,044 |
| 10 Westernmost Countries in Europe | 0 | - | 4.96 | 150,627 |
| Top 10 Languages Spoken in Europe | 0 | - | 4.96 | 217,154 |
| European Landmarks Map Quiz | 0 | - | 4.97 | 86,700 |
| Countries of Europe in 1650 with a Map | 0 | - | 4.95 | 68,154 |
| Countries with Territory in the Balkans | 0 | - | 4.96 | 88,626 |
| Eastern Europe Map Quiz | 0 | - | 4.91 | 127,433 |
| Slavic Countries | 0 | - | 4.96 | 111,154 |
| Countries Closest to Germany A-Z | 0 | - | 4.98 | 27,065 |
| States of the German Confederation in 1848 | 0 | - | 4.89 | 31,708 |
| UK Cities Map Quiz | 0 | - | 4.95 | 463,028 |
| Counties of England | 0 | - | 4.97 | 791,837 |
| Invasions of Great Britain | 0 | - | 4.51 | 59,690 |
| Places Where Winston Churchill Said We Would Fight the Nazis | 0 | - | 4.57 | 14,575 |
| Countries of the Mongol Empire on a Map | 0 | - | 4.99 | 106,227 |
| Top 10 Biggest Economies in Africa | 0 | - | 4.99 | 119,686 |
| Category Elimination - African Geography #1 | 0 | - | 4.90 | 91,484 |
| Prime Ministers of Australia | 0 | - | 4.50 | 31,765 |
| Top 10 Biggest Economies in the Americas | 0 | - | 4.93 | 91,372 |
| U.S. Citizenship Test Questions | 0 | - | 4.83 | 238,713 |
| U.S. Federal Agency Acronyms | 0 | - | 4.50 | 79,825 |
| European Diaspora - Top 11 Countries | 0 | - | 4.90 | 95,277 |
| 10 European Countries with the Most Tourists | 0 | - | 4.98 | 136,805 |
| Three Band Flags of Europe | 0 | - | 4.98 | 192,367 |
| Catholic Countries in Europe | 0 | - | 4.83 | 94,514 |
| Pixelated Europe Map | 0 | - | 4.88 | 122,149 |
| European Countries with One Border | 0 | - | 4.97 | 182,015 |
| European Countries with the Fewest Borders | 0 | - | 4.97 | 178,890 |
| Category Elimination - European Geography #1 | 0 | - | 4.98 | 231,513 |
| Category Elimination - European Geography #2 | 0 | - | 4.99 | 165,903 |
| Name a Valid European Country #1 | 0 | - | 4.99 | 258,248 |
| Name a Valid European Country #2 | 0 | - | 4.94 | 113,749 |
| European Capital Superlatives - Top 2 | 0 | - | 4.94 | 80,862 |
| Russia Country Quiz | 0 | - | 4.85 | 113,964 |
| Countries That Border Russia | 0 | - | 4.98 | 460,078 |
| Arms Exports - Russia | 0 | - | 4.48 | 25,068 |
| Soviet Leaders 1917–1991 | 0 | - | 4.43 | 94,633 |
| Croatia Country Quiz | 0 | - | 4.83 | 43,034 |
| Countries Formerly in Yugoslavia | 0 | - | 4.95 | 124,451 |
| Bosnia and Herzegovina Country Quiz | 0 | - | 4.86 | 35,157 |
| Regions of France Map Quiz | 0 | - | 4.97 | 143,643 |
| France Cities Map Quiz | 0 | - | 4.96 | 165,599 |
| Countries Bordering France | 0 | - | 4.83 | 400,849 |
| Germany Country Quiz | 0 | - | 4.82 | 157,051 |
| States of Germany Map Quiz | 0 | - | 4.91 | 132,081 |
| Germany Cities Map Quiz | 0 | - | 4.87 | 125,480 |
| Countries Bordering Germany | 0 | - | 4.99 | 367,797 |
| Italy Country Quiz | 0 | - | 4.82 | 122,584 |
| Regions of Italy Map Quiz | 0 | - | 4.96 | 148,740 |
| Italy Cities Map Quiz | 0 | - | 4.97 | 151,386 |
| Countries Italy Declared War On | 0 | - | 4.75 | 43,111 |
| Spain Cities Map Quiz | 0 | - | 4.87 | 96,343 |
| Regions of Spain Map Quiz | 0 | - | 4.95 | 184,958 |
| Biggest Spanish Empire Countries | 0 | - | 4.91 | 115,339 |
| UK Immigration by Country | 0 | - | 4.94 | 140,019 |
| United Kingdom Country Quiz | 0 | - | 4.96 | 138,762 |
| Countries and Territories of the United Kingdom | 0 | - | 4.89 | 93,270 |
| Counties of England Map Quiz | 0 | - | 4.97 | 306,515 |
| Wives of King Henry VIII | 0 | - | 4.55 | 53,255 |
| English Royal Consorts | 0 | - | 4.37 | 37,250 |
| Countries the UK Declared War On | 0 | - | 4.61 | 122,043 |
| Geography of the British Empire | 0 | - | 4.48 | 39,566 |
| Medieval English History | 0 | - | 4.53 | 43,375 |
| All UK Parliament Constituencies on a Map | 0 | - | 4.60 | 28,620 |
| Name the Popes Quiz | 0 | - | 4.47 | 137,490 |
| Countries of the Popes | 0 | - | 4.79 | 127,531 |
| Top 10 Coldest Asian Countries | 0 | - | 4.95 | 122,645 |
| Top 10 Biggest Economies in Asia | 0 | - | 4.87 | 118,468 |
| Monarchies of Asia | 0 | - | 4.97 | 70,775 |
| Category Elimination - Asian Geography #1 | 0 | - | 4.85 | 109,178 |
| Category Elimination - Asian Geography #2 | 0 | - | 4.94 | 95,953 |
| Asian Country Superlatives | 0 | - | 4.83 | 80,578 |
| Countries in World War II | 0 | - | 4.54 | 907,615 |
| Political Movements by Country | 0 | - | 4.46 | 72,359 |
| Battle to Country | 0 | - | 4.91 | 52,817 |
| Hindu Countries | 0 | - | 4.86 | 49,781 |
| Top 10 Richest Countries in Africa | 0 | - | 4.85 | 75,446 |
| Top 10 Richest Countries in the Americas | 0 | - | 4.93 | 81,272 |
| All U.S. Supreme Court Justices | 0 | - | 4.54 | 28,940 |
| All U.S. Supreme Court Justices Ever | 0 | - | 4.49 | 11,693 |
| Red State or Blue State Trait? | 0 | - | 4.42 | 55,098 |
| The American Civil War | 0 | - | 4.62 | 52,251 |
| Countries That Touch the Adriatic Sea | 0 | - | 4.96 | 70,897 |
| Most Guessed European Capitals | 0 | - | 4.87 | 101,319 |
| Top 10 European Countries by Coastline | 0 | - | 4.87 | 138,047 |
| Countries that Border Poland | 0 | - | 4.99 | 171,703 |
| Russia by Picture | 0 | - | 4.40 | 20,315 |
| Non-Bordering Countries Closest to Russia | 0 | - | 4.91 | 82,526 |
| Countries that Beat Russia | 0 | - | 4.81 | 82,184 |
| Countries that Border Hungary | 0 | - | 4.98 | 103,891 |
| Countries Bordering Serbia | 0 | - | 4.96 | 92,004 |
| Countries Bordering Austria | 0 | - | 4.97 | 117,981 |
| Modern Day Countries of Austria-Hungary on a Map | 0 | - | 4.98 | 103,090 |
| Countries that Visit France the Most | 0 | - | 4.85 | 45,670 |
| Countries Closest to Metropolitan France | 0 | - | 4.89 | 71,944 |
| Germany A-Z | 0 | - | 4.56 | 62,427 |
| Countries that Beat Germany | 0 | - | 4.95 | 105,747 |
| Countries With the Most German Speakers | 0 | - | 4.89 | 95,184 |
| The Trojan War | 0 | - | 4.83 | 39,536 |
| Letters of the Greek Alphabet | 0 | - | 4.97 | 644,041 |
| Name that Greek Letter | 0 | - | 4.93 | 322,333 |
| Greek Mythology General Knowledge #1 | 0 | - | 4.85 | 111,037 |
| Counties of Ireland | 0 | - | 4.92 | 193,811 |
| Italy A-Z | 0 | - | 4.49 | 57,954 |
| Countries Bordering Italy | 0 | - | 4.94 | 100,605 |
| Countries that Beat Italy | 0 | - | 4.85 | 54,080 |
| Countries Closest to Italy | 0 | - | 4.97 | 196,793 |
| Ancient Roman Trivia #1 | 0 | - | 4.85 | 84,228 |
| Roman Emperors | 0 | - | 4.95 | 119,047 |
| Countries Closest to Iceland | 0 | - | 4.89 | 73,083 |
| Countries that Beat Portugal | 0 | - | 4.86 | 58,904 |
| Geography of the Spanish Empire | 0 | - | 4.49 | 37,068 |
| Countries Closest to Spain | 0 | - | 4.96 | 226,118 |
| Countries that Beat Spain | 0 | - | 4.94 | 62,622 |
| Countries that Visit the UK the Most | 0 | - | 4.87 | 74,575 |
| The United States... or the United Kingdom? | 0 | - | 4.87 | 98,057 |
| Counties of the UK and Ireland | 0 | - | 4.98 | 129,292 |
| Monty Python Quotes | 0 | - | 4.88 | 42,364 |
| The Reign of Henry VIII | 0 | - | 4.25 | 27,657 |
| English First Names of the Middle Ages | 0 | - | 4.47 | 60,455 |
| British History Multiple Choice #1 | 0 | - | 4.46 | 55,028 |
| British History Multiple Choice #2 | 0 | - | 4.42 | 37,883 |
| British History Quiz for Dummies | 0 | - | 4.70 | 78,302 |
| Elizabeth I... or Elizabeth II? | 0 | - | 4.30 | 24,454 |
| The Reign of Queen Elizabeth II | 0 | - | 4.36 | 35,741 |
| The Life of Winston Churchill | 0 | - | 4.16 | 11,826 |
| World Capitals Closest to London | 0 | - | 4.87 | 109,996 |
| 50 Busiest Air Routes from London | 0 | - | 4.87 | 95,966 |
| 2025–2026 Football League Teams | 0 | - | 4.93 | 398,671 |
| National Founders | 0 | - | 4.40 | 83,715 |
| Important Cities in WWII | 0 | - | 4.42 | 93,131 |
| Countries with the Most Hindus | 0 | - | 4.90 | 122,578 |
| Random Sequential Oceanic Countries on a Map | 0 | - | 4.97 | 26,987 |
| Biggest Trading Partners - Colombia | 0 | - | 4.88 | 40,085 |
| Countries Closest to United States A-Z | 0 | - | 4.82 | 117,733 |
| U.S. States by Governor | 0 | - | 4.43 | 18,008 |
| U.S. Political Parties in History | 0 | - | 4.44 | 27,610 |
| The U.S. Government - How Does it Work? | 0 | - | 4.34 | 42,246 |
| U.S. Government Agencies | 0 | - | 4.44 | 19,591 |
| U.S. Presidential Trivia #1 | 0 | - | 4.45 | 108,205 |
| U.S. Presidents by Event | 0 | - | 4.58 | 33,833 |
| Losing U.S. Presidential Candidates in History | 0 | - | 4.61 | 93,273 |
| Presidential Middle Names | 0 | - | 4.41 | 59,879 |
| U.S. Presidential Trivia #2 | 0 | - | 4.49 | 52,924 |
| Assassinated U.S. Presidents | 0 | - | 4.63 | 94,119 |
| U.S. Presidents Who Died in Office | 0 | - | 4.77 | 34,831 |
| Ten Least Guessed U.S. Presidents | 0 | - | 4.45 | 38,252 |
| 100 Most Influential Figures in U.S. History | 0 | - | 4.20 | 44,799 |
| Top 10 Coldest U.S. States | 0 | - | 4.94 | 124,151 |
| Top 10 Hottest U.S. States | 0 | - | 4.86 | 125,001 |
| Top 10 U.S. States with the Least Precipitation | 0 | - | 4.82 | 61,667 |
| Anglo-Saxon and Viking Kings of England | 0 | - | 4.74 | 12,140 |
