| The Dictator Files: Vladimir Lenin | 0 | - | 4.46 | 26,940 |
| Countries of the Soviet Union | 0 | - | 4.98 | 195,599 |
| Soviet Leaders 1917–1991 | 0 | - | 4.44 | 95,588 |
| Name the English Monarchs | 0 | - | 4.91 | 506,754 |
| Countries Invaded by the USSR | 0 | - | 4.29 | 94,442 |
| Monarchies of Europe | 0 | - | 4.90 | 98,910 |
| Countries of Europe in 1815 With a Map | 0 | - | 4.99 | 151,419 |
| Countries of Europe in 1848 | 0 | - | 4.98 | 85,586 |
| Countries of Europe in 1870 with a Map | 0 | - | 4.95 | 65,843 |
| Every Country of Europe Since 1815 With a Map | 0 | - | 4.97 | 71,891 |
| Countries of Europe in 1360 with a Map | 0 | - | 4.99 | 57,621 |
| U.S. Cabinet Departments | 0 | - | 4.86 | 73,114 |
| U.S. Presidents Quiz | 0 | - | 5.00 | 3,727,158 |
| Top 10 Coldest European Countries | 0 | - | 4.94 | 193,949 |
| Top 10 Hottest European Countries | 0 | - | 4.88 | 127,844 |
| European Secessionist Movements on a Map | 0 | - | 4.53 | 35,196 |
| Top 10 Biggest Economies in Europe | 0 | - | 4.98 | 200,784 |
| Modern-Day Countries of the British Empire in 1921 | 0 | - | 4.99 | 118,832 |
| Communist Countries in History | 0 | - | 4.63 | 498,352 |
| Deadliest U.S. Wars | 0 | - | 4.89 | 191,824 |
| Europe Map Quiz | 0 | - | 5.00 | 4,789,414 |
| Top 10 Richest Countries in Europe | 0 | - | 4.90 | 151,281 |
| Biggest Trading Partners - European Union | 0 | - | 4.91 | 73,332 |
| Category Elimination - European Countries #1 | 0 | - | 4.90 | 91,124 |
| Prime Ministers of the UK | 0 | - | 4.95 | 442,498 |
| Canadian Prime Ministers | 0 | - | 4.64 | 57,948 |
| Zone 1 London Underground Stations - With a Map | 0 | - | 4.90 | 52,792 |
| Axis Occupied Countries of WWII | 0 | - | 4.99 | 230,215 |
| Countries in World War I | 0 | - | 4.88 | 229,224 |
| U.S. Presidents by Picture | 0 | - | 4.87 | 428,612 |
| First Names of U.S. Presidents | 0 | - | 4.86 | 383,680 |
| Countries That Use the Euro | 0 | - | 4.95 | 106,909 |
| Europe Cities Map Quiz | 0 | - | 4.99 | 366,319 |
| 10 Easternmost Countries in Europe | 0 | - | 4.87 | 117,231 |
| The Only European Country ... | 0 | - | 4.91 | 219,175 |
| European Countries NOT in NATO | 0 | - | 4.91 | 62,600 |
| Countries Closest to Spain A-Z | 0 | - | 4.99 | 108,844 |
| Countries Closest to the United Kingdom A-Z | 0 | - | 4.96 | 192,046 |
| The Reign of Queen Elizabeth I | 0 | - | 4.53 | 31,977 |
| British History A-Z #1 | 0 | - | 4.45 | 47,278 |
| Houses of British Monarchs | 0 | - | 4.54 | 65,973 |
| Name a Valid U.S. President #1 | 0 | - | 4.89 | 193,860 |
| Play-Doh Presidents | 0 | - | 5.00 | 82,893 |
| Flags of Europe Quiz | 0 | - | 4.99 | 1,258,908 |
| Countries of Europe - One Minute Sprint | 0 | - | 4.94 | 1,336,074 |
| 10 Biggest European Countries by Area | 0 | - | 4.99 | 193,610 |
| 10 Westernmost Countries in Europe | 0 | - | 4.96 | 152,123 |
| Top 10 Languages Spoken in Europe | 0 | - | 4.96 | 220,931 |
| European Landmarks Map Quiz | 0 | - | 4.97 | 87,806 |
| Countries of Europe in 1650 with a Map | 0 | - | 4.95 | 70,527 |
| Countries with Territory in the Balkans | 0 | - | 4.96 | 90,233 |
| Eastern Europe Map Quiz | 0 | - | 4.91 | 128,817 |
| Slavic Countries | 0 | - | 4.96 | 112,411 |
| Flags of Countries That Border Russia | 0 | - | 4.70 | 84,092 |
| Countries Closest to Germany A-Z | 0 | - | 4.98 | 27,627 |
| States of the German Confederation in 1848 | 0 | - | 4.90 | 32,472 |
| UK Cities Map Quiz | 0 | - | 4.96 | 466,535 |
| Counties of England | 0 | - | 4.97 | 803,246 |
| Invasions of Great Britain | 0 | - | 4.51 | 60,105 |
| Places Where Winston Churchill Said We Would Fight the Nazis | 0 | - | 4.57 | 14,653 |
| Prime Ministers of Australia | 0 | - | 4.51 | 32,206 |
| Top 10 Biggest Economies in the Americas | 0 | - | 4.94 | 92,868 |
| U.S. Citizenship Test Questions | 0 | - | 4.83 | 240,852 |
| U.S. Federal Agency Acronyms | 0 | - | 4.50 | 80,156 |
| European Diaspora - Top 11 Countries | 0 | - | 4.88 | 96,868 |
| 10 European Countries with the Most Tourists | 0 | - | 4.98 | 138,573 |
| Three Band Flags of Europe | 0 | - | 4.98 | 194,648 |
| Catholic Countries in Europe | 0 | - | 4.83 | 95,797 |
| Pixelated Europe Map | 0 | - | 4.88 | 123,506 |
| European Countries with One Border | 0 | - | 4.97 | 183,858 |
| European Countries with the Fewest Borders | 0 | - | 4.97 | 180,577 |
| Category Elimination - European Geography #1 | 0 | - | 4.98 | 235,982 |
| Category Elimination - European Geography #2 | 0 | - | 4.99 | 169,005 |
| Name a Valid European Country #1 | 0 | - | 4.99 | 264,786 |
| Name a Valid European Country #2 | 0 | - | 4.94 | 115,938 |
| European Capital Superlatives - Top 2 | 0 | - | 4.95 | 81,587 |
| Russia Country Quiz | 0 | - | 4.83 | 115,343 |
| Russia A-Z | 0 | - | 4.46 | 27,318 |
| Countries That Border Russia | 0 | - | 4.98 | 464,596 |
| Arms Exports - Russia | 0 | - | 4.49 | 25,197 |
| Croatia Country Quiz | 0 | - | 4.83 | 43,772 |
| Countries Formerly in Yugoslavia | 0 | - | 4.95 | 125,498 |
| Bosnia and Herzegovina Country Quiz | 0 | - | 4.83 | 35,603 |
| Andorra Country Quiz | 0 | - | 4.91 | 31,952 |
| Regions of France Map Quiz | 0 | - | 4.97 | 145,686 |
| France Cities Map Quiz | 0 | - | 4.96 | 167,849 |
| Countries Bordering France | 0 | - | 4.83 | 405,010 |
| Germany Country Quiz | 0 | - | 4.82 | 158,885 |
| States of Germany Map Quiz | 0 | - | 4.92 | 133,844 |
| Germany Cities Map Quiz | 0 | - | 4.87 | 127,113 |
| Countries Bordering Germany | 0 | - | 4.99 | 371,941 |
| Regions of Italy Map Quiz | 0 | - | 4.96 | 150,276 |
| Italy Cities Map Quiz | 0 | - | 4.97 | 153,085 |
| Countries Italy Declared War On | 0 | - | 4.70 | 45,371 |
| Spain Cities Map Quiz | 0 | - | 4.87 | 97,522 |
| Regions of Spain Map Quiz | 0 | - | 4.95 | 186,902 |
| Biggest Spanish Empire Countries | 0 | - | 4.91 | 116,970 |
| UK Immigration by Country | 0 | - | 4.94 | 141,754 |
| United Kingdom Country Quiz | 0 | - | 4.96 | 141,070 |
| Countries and Territories of the United Kingdom | 0 | - | 4.90 | 94,552 |
| Counties of England Map Quiz | 0 | - | 4.97 | 309,118 |
| Wives of King Henry VIII | 0 | - | 4.55 | 53,468 |
| English Royal Consorts | 0 | - | 4.38 | 37,536 |
| Countries the UK Declared War On | 0 | - | 4.55 | 123,285 |
| Geography of the British Empire | 0 | - | 4.48 | 39,850 |
| Medieval English History | 0 | - | 4.53 | 43,662 |
| All UK Parliament Constituencies on a Map | 0 | - | 4.60 | 29,042 |
| Name the Popes Quiz | 0 | - | 4.47 | 138,971 |
| Countries of the Popes | 0 | - | 4.79 | 128,770 |
| Top 10 Coldest Asian Countries | 0 | - | 4.95 | 123,772 |
| Top 10 Biggest Economies in Asia | 0 | - | 4.87 | 137,416 |
| Monarchies of Asia | 0 | - | 4.97 | 71,525 |
| Category Elimination - Asian Geography #1 | 0 | - | 4.86 | 111,405 |
| Category Elimination - Asian Geography #2 | 0 | - | 4.94 | 97,768 |
| Asian Country Superlatives | 0 | - | 4.84 | 81,302 |
| Countries of the Mongol Empire on a Map | 0 | - | 4.99 | 107,577 |
| Top 10 Biggest Economies in Africa | 0 | - | 4.99 | 121,375 |
| Category Elimination - African Geography #1 | 0 | - | 4.90 | 93,467 |
| Countries in World War II | 0 | - | 4.53 | 919,211 |
| Political Movements by Country | 0 | - | 4.46 | 72,789 |
| Battle to Country | 0 | - | 4.91 | 53,997 |
| Top 10 Richest Countries in the Americas | 0 | - | 4.94 | 95,355 |
| All U.S. Supreme Court Justices | 0 | - | 4.54 | 29,149 |
| All U.S. Supreme Court Justices Ever | 0 | - | 4.50 | 11,866 |
| Red State or Blue State Trait? | 0 | - | 4.42 | 55,721 |
| The American Civil War | 0 | - | 4.62 | 52,634 |
| Countries That Touch the Adriatic Sea | 0 | - | 4.96 | 71,364 |
| Most Guessed European Capitals | 0 | - | 4.87 | 101,829 |
| Top 10 European Countries by Coastline | 0 | - | 4.86 | 138,750 |
| Countries that Border Poland | 0 | - | 4.99 | 173,208 |
| Countries that Bordered the USSR | 0 | - | 4.93 | 166,498 |
| Non-Bordering Countries Closest to Russia | 0 | - | 4.91 | 83,289 |
| Biggest Trading Partners - Russia | 0 | - | 4.55 | 36,660 |
| Countries that Beat Russia | 0 | - | 4.81 | 83,641 |
| Countries With the Most Russian Speakers | 0 | - | 4.97 | 102,949 |
| Countries that Border Hungary | 0 | - | 4.98 | 105,024 |
| Countries Bordering Serbia | 0 | - | 4.96 | 93,117 |
| Countries Bordering Austria | 0 | - | 4.97 | 118,962 |
| Modern Day Countries of Austria-Hungary on a Map | 0 | - | 4.98 | 104,825 |
| Countries that Visit France the Most | 0 | - | 4.85 | 46,161 |
| Countries Closest to Metropolitan France | 0 | - | 4.89 | 72,495 |
| Germany A-Z | 0 | - | 4.56 | 62,873 |
| Countries that Beat Germany | 0 | - | 4.94 | 107,362 |
| Countries With the Most German Speakers | 0 | - | 4.89 | 98,747 |
| The Trojan War | 0 | - | 4.83 | 40,004 |
| Letters of the Greek Alphabet | 0 | - | 4.97 | 652,191 |
| Name that Greek Letter | 0 | - | 4.93 | 325,062 |
| Greek Mythology General Knowledge #1 | 0 | - | 4.85 | 113,016 |
| Counties of Ireland | 0 | - | 4.92 | 197,397 |
| Italy A-Z | 0 | - | 4.49 | 58,775 |
| Countries Bordering Italy | 0 | - | 4.94 | 101,275 |
| Countries that Beat Italy | 0 | - | 4.85 | 55,205 |
| Countries Closest to Italy | 0 | - | 4.97 | 199,432 |
| Ancient Roman Trivia #1 | 0 | - | 4.85 | 85,612 |
| Roman Emperors | 0 | - | 4.95 | 121,264 |
| Countries Closest to Iceland | 0 | - | 4.90 | 74,177 |
| Countries that Beat Portugal | 0 | - | 4.86 | 59,899 |
| Geography of the Spanish Empire | 0 | - | 4.49 | 37,316 |
| Countries Closest to Spain | 0 | - | 4.96 | 228,172 |
| Countries that Beat Spain | 0 | - | 4.94 | 63,368 |
| Countries that Visit the UK the Most | 0 | - | 4.88 | 75,892 |
| The United States... or the United Kingdom? | 0 | - | 4.87 | 99,112 |
| Counties of the UK and Ireland | 0 | - | 4.98 | 132,456 |
| Monty Python Quotes | 0 | - | 4.89 | 42,613 |
| The Reign of Henry VIII | 0 | - | 4.25 | 27,875 |
| English First Names of the Middle Ages | 0 | - | 4.47 | 61,104 |
| British History Multiple Choice #1 | 0 | - | 4.46 | 55,329 |
| British History Multiple Choice #2 | 0 | - | 4.42 | 38,095 |
| British History Quiz for Dummies | 0 | - | 4.70 | 79,077 |
| Elizabeth I... or Elizabeth II? | 0 | - | 4.30 | 24,567 |
| The Reign of Queen Elizabeth II | 0 | - | 4.36 | 36,002 |
| The Life of Winston Churchill | 0 | - | 4.16 | 11,874 |
| World Capitals Closest to London | 0 | - | 4.88 | 111,085 |
| 50 Busiest Air Routes from London | 0 | - | 4.87 | 97,323 |
| 2026–2027 Football League Teams | 0 | - | 4.94 | 407,147 |
| Hindu Countries | 0 | - | 4.87 | 50,599 |
| Top 10 Richest Countries in Africa | 0 | - | 4.85 | 77,055 |
| National Founders | 0 | - | 4.40 | 83,980 |
| Important Cities in WWII | 0 | - | 4.42 | 93,942 |
| Random Sequential Oceanic Countries on a Map | 0 | - | 4.97 | 27,427 |
| Biggest Trading Partners - Colombia | 0 | - | 4.88 | 40,564 |
| Names of Generations | 0 | - | 4.09 | 45,543 |
| Countries Closest to United States A-Z | 0 | - | 4.82 | 118,747 |
| U.S. States by Governor | 0 | - | 4.43 | 18,115 |
| U.S. Political Parties in History | 0 | - | 4.44 | 27,770 |
| The U.S. Government - How Does it Work? | 0 | - | 4.34 | 42,480 |
| U.S. Government Agencies | 0 | - | 4.44 | 19,782 |
| U.S. Presidential Trivia #1 | 0 | - | 4.45 | 109,581 |
| U.S. Presidents by Event | 0 | - | 4.58 | 35,376 |
| Losing U.S. Presidential Candidates in History | 0 | - | 4.62 | 94,670 |
| Presidential Middle Names | 0 | - | 4.41 | 60,748 |
| U.S. Presidential Trivia #2 | 0 | - | 4.49 | 53,706 |
| Assassinated U.S. Presidents | 0 | - | 4.63 | 94,910 |
| U.S. Presidents Who Died in Office | 0 | - | 4.77 | 35,219 |
| Ten Least Guessed U.S. Presidents | 0 | - | 4.45 | 38,640 |
| 100 Most Influential Figures in U.S. History | 0 | - | 4.20 | 45,230 |
| Top 10 Coldest U.S. States | 0 | - | 4.94 | 125,907 |
| Top 10 Hottest U.S. States | 0 | - | 4.86 | 126,563 |
| Top 10 U.S. States with the Least Precipitation | 0 | - | 4.83 | 62,232 |
| Anglo-Saxon and Viking Kings of England | 0 | - | 4.75 | 12,344 |
