| The Dictator Files: Joseph Stalin | 0 | - | 4.37 | 48,288 |
| Soviet Union Country Quiz | 0 | - | 4.90 | 80,235 |
| Neutral European Countries of WWII | 0 | - | 4.91 | 160,467 |
| Countries of Europe After World War II | 0 | - | 4.99 | 186,740 |
| Countries of Europe Before World War I | 0 | - | 4.99 | 155,350 |
| Soviet Leaders 1917–1991 | 0 | - | 4.43 | 94,429 |
| Countries of the Soviet Union | 0 | - | 4.98 | 193,832 |
| Prime Ministers of the UK | 0 | - | 4.96 | 434,623 |
| Countries of Europe in 1815 With a Map | 0 | - | 4.99 | 148,945 |
| Countries of Europe in 1848 | 0 | - | 4.98 | 75,417 |
| Countries of Europe in 1870 with a Map | 0 | - | 4.95 | 63,407 |
| Every Country of Europe Since 1815 With a Map | 0 | - | 4.98 | 70,109 |
| Countries of the Japanese Empire | 0 | - | 4.97 | 103,860 |
| U.S. Presidents Quiz | 0 | - | 5.00 | 3,654,157 |
| Top 10 Richest Countries in Europe | 0 | - | 4.91 | 148,146 |
| Top 10 Biggest Economies in Europe | 0 | - | 4.98 | 197,253 |
| Biggest Trading Partners - European Union | 0 | - | 4.91 | 72,107 |
| Category Elimination - European Countries #1 | 0 | - | 4.89 | 88,966 |
| Modern Day Countries of Nazi Germany on a Map | 0 | - | 4.97 | 143,171 |
| Modern-Day Countries of the British Empire in 1921 | 0 | - | 4.99 | 116,271 |
| Name the English Monarchs | 0 | - | 4.92 | 497,866 |
| Prime Ministers of Australia | 0 | - | 4.50 | 31,677 |
| Canadian Prime Ministers | 0 | - | 4.63 | 57,038 |
| Europe Map Quiz | 0 | - | 5.00 | 4,731,149 |
| The Dictator Files: Vladimir Lenin | 0 | - | 4.45 | 26,636 |
| Biggest Trading Partners - Germany | 0 | - | 4.97 | 70,771 |
| Countries Italy Declared War On | 0 | - | 4.75 | 42,948 |
| Biggest Trading Partners - Spain | 0 | - | 4.91 | 53,505 |
| Places Where Winston Churchill Said We Would Fight the Nazis | 0 | - | 4.57 | 14,545 |
| U.S. Presidents by Picture | 0 | - | 4.87 | 423,716 |
| First Names of U.S. Presidents | 0 | - | 4.85 | 379,543 |
| Two Letter Roman Numerals | 0 | - | 4.97 | 55,615 |
| Countries Closest to Spain A-Z | 0 | - | 4.99 | 107,675 |
| Countries Closest to the United Kingdom A-Z | 0 | - | 4.96 | 189,912 |
| Name a Valid U.S. President #1 | 0 | - | 4.89 | 189,843 |
| The American Revolution | 0 | - | 4.52 | 54,054 |
| Countries That Use the Euro | 0 | - | 4.96 | 102,975 |
| Flags of Europe Quiz | 0 | - | 4.99 | 1,226,548 |
| Europe Cities Map Quiz | 0 | - | 4.99 | 362,300 |
| Countries of Europe - One Minute Sprint | 0 | - | 4.94 | 1,319,735 |
| 10 Easternmost Countries in Europe | 0 | - | 4.89 | 113,545 |
| 10 Biggest European Countries by Area | 0 | - | 4.99 | 191,713 |
| 10 Westernmost Countries in Europe | 0 | - | 4.96 | 150,288 |
| Top 10 Languages Spoken in Europe | 0 | - | 4.96 | 216,311 |
| European Landmarks Map Quiz | 0 | - | 4.97 | 86,463 |
| The Only European Country ... | 0 | - | 4.91 | 213,821 |
| European Secessionist Movements on a Map | 0 | - | 4.53 | 34,744 |
| European Countries NOT in NATO | 0 | - | 4.87 | 59,527 |
| Countries of Europe in 1650 with a Map | 0 | - | 4.95 | 67,420 |
| Countries with Territory in the Balkans | 0 | - | 4.96 | 88,255 |
| Eastern Europe Map Quiz | 0 | - | 4.91 | 127,197 |
| Slavic Countries | 0 | - | 4.96 | 110,853 |
| The Reign of Napoleon | 0 | - | 4.54 | 38,676 |
| Countries Closest to Germany A-Z | 0 | - | 4.98 | 26,931 |
| Countries in the Byzantine Empire | 0 | - | 4.95 | 71,732 |
| UK Cities Map Quiz | 0 | - | 4.95 | 462,123 |
| Counties of England | 0 | - | 4.97 | 789,151 |
| Invasions of Great Britain | 0 | - | 4.51 | 59,387 |
| The Life of Winston Churchill | 0 | - | 4.16 | 11,810 |
| All UK Parliament Constituencies on a Map | 0 | - | 4.60 | 28,540 |
| Name the Popes Quiz | 0 | - | 4.47 | 137,152 |
| Countries of the Popes | 0 | - | 4.79 | 127,211 |
| The Vietnam War | 0 | - | 4.43 | 35,294 |
| Countries of the Mongol Empire on a Map | 0 | - | 4.99 | 105,891 |
| African Countries with the Most Christians | 0 | - | 4.94 | 74,861 |
| Top 10 Biggest Economies in Africa | 0 | - | 4.99 | 119,362 |
| U.S. Citizenship Test Questions | 0 | - | 4.83 | 238,322 |
| U.S. Federal Agency Acronyms | 0 | - | 4.50 | 79,736 |
| All U.S. Supreme Court Justices | 0 | - | 4.54 | 28,882 |
| U.S. Cabinet Departments | 0 | - | 4.86 | 72,526 |
| All U.S. Supreme Court Justices Ever | 0 | - | 4.49 | 11,670 |
| The Franklin D. Roosevelt Presidency | 0 | - | 4.43 | 23,814 |
| Top 10 Coldest European Countries | 0 | - | 4.94 | 192,242 |
| Top 10 Hottest European Countries | 0 | - | 4.89 | 126,117 |
| European Diaspora - Top 11 Countries | 0 | - | 4.90 | 95,037 |
| 10 European Countries with the Most Tourists | 0 | - | 4.98 | 136,386 |
| Three Band Flags of Europe | 0 | - | 4.98 | 191,849 |
| Pixelated Europe Map | 0 | - | 4.88 | 121,804 |
| Monarchies of Europe | 0 | - | 4.90 | 97,307 |
| European Countries with One Border | 0 | - | 4.97 | 181,619 |
| European Countries with the Fewest Borders | 0 | - | 4.97 | 178,519 |
| Name a Valid European Country #1 | 0 | - | 4.99 | 256,770 |
| Name a Valid European Country #2 | 0 | - | 4.94 | 113,243 |
| European Capital Superlatives - Top 2 | 0 | - | 4.94 | 80,664 |
| Russia Country Quiz | 0 | - | 4.85 | 113,629 |
| Countries That Border Russia | 0 | - | 4.98 | 458,901 |
| Arms Exports - Russia | 0 | - | 4.48 | 24,763 |
| Countries Invaded by the USSR | 0 | - | 4.29 | 93,545 |
| Croatia Country Quiz | 0 | - | 4.83 | 42,848 |
| Countries Formerly in Yugoslavia | 0 | - | 4.95 | 124,194 |
| Bosnia and Herzegovina Country Quiz | 0 | - | 4.86 | 35,036 |
| Regions of France Map Quiz | 0 | - | 4.97 | 143,117 |
| France Cities Map Quiz | 0 | - | 4.96 | 165,185 |
| Countries Bordering France | 0 | - | 4.83 | 399,039 |
| Germany Country Quiz | 0 | - | 4.82 | 156,541 |
| States of Germany Map Quiz | 0 | - | 4.91 | 131,680 |
| Germany Cities Map Quiz | 0 | - | 4.86 | 125,142 |
| Countries Bordering Germany | 0 | - | 4.99 | 367,035 |
| States of the German Confederation in 1848 | 0 | - | 4.89 | 31,520 |
| Italy Country Quiz | 0 | - | 4.82 | 122,199 |
| Regions of Italy Map Quiz | 0 | - | 4.96 | 148,372 |
| Italy Cities Map Quiz | 0 | - | 4.97 | 151,074 |
| Spain Cities Map Quiz | 0 | - | 4.87 | 95,949 |
| Regions of Spain Map Quiz | 0 | - | 4.95 | 184,634 |
| Biggest Spanish Empire Countries | 0 | - | 4.91 | 114,849 |
| UK Immigration by Country | 0 | - | 4.94 | 139,628 |
| United Kingdom Country Quiz | 0 | - | 4.96 | 138,133 |
| Countries and Territories of the United Kingdom | 0 | - | 4.89 | 92,907 |
| Counties of England Map Quiz | 0 | - | 4.97 | 306,081 |
| Wives of King Henry VIII | 0 | - | 4.55 | 53,173 |
| Countries the UK Declared War On | 0 | - | 4.61 | 121,771 |
| Geography of the British Empire | 0 | - | 4.48 | 39,471 |
| Medieval English History | 0 | - | 4.53 | 43,317 |
| Asian Countries with the Most Christians | 0 | - | 4.85 | 96,254 |
| Top 10 Biggest Economies in Asia | 0 | - | 4.85 | 113,241 |
| The Iraq War | 0 | - | 4.47 | 15,552 |
| Country by Photo of its Leader | 0 | - | 4.74 | 123,254 |
| Political Movements by Country | 0 | - | 4.46 | 72,259 |
| Countries with the Most Hindus | 0 | - | 4.90 | 122,345 |
| Hindu Countries | 0 | - | 4.85 | 49,577 |
| Top 10 Richest Countries in Africa | 0 | - | 4.85 | 75,175 |
| Biggest Trading Partners – Australia | 0 | - | 4.93 | 60,954 |
| Arms Exports - United States | 0 | - | 4.70 | 54,346 |
| U.S. Bill of Rights | 0 | - | 4.53 | 32,376 |
| U.S. Vice Presidents | 0 | - | 4.41 | 134,931 |
| U.S. Presidential Trivia #1 | 0 | - | 4.45 | 107,947 |
| U.S. Presidents by Event | 0 | - | 4.58 | 33,493 |
| Losing U.S. Presidential Candidates in History | 0 | - | 4.61 | 92,999 |
| Presidential Middle Names | 0 | - | 4.41 | 59,701 |
| U.S. Presidential Trivia #2 | 0 | - | 4.49 | 52,734 |
| Assassinated U.S. Presidents | 0 | - | 4.63 | 93,818 |
| U.S. Presidents Who Died in Office | 0 | - | 4.77 | 34,745 |
| Ten Least Guessed U.S. Presidents | 0 | - | 4.45 | 38,169 |
| Deadliest U.S. Wars | 0 | - | 4.89 | 189,251 |
| Anglo-Saxon and Viking Kings of England | 0 | - | 4.74 | 12,090 |
| Countries That Touch the Adriatic Sea | 0 | - | 4.96 | 70,791 |
| Most Guessed European Capitals | 0 | - | 4.87 | 101,196 |
| Top 10 European Countries by Coastline | 0 | - | 4.89 | 137,850 |
| Random European Flag to Country | 0 | - | 4.89 | 180,884 |
| Countries that Border Poland | 0 | - | 4.99 | 171,345 |
| Countries that Bordered the USSR | 0 | - | 4.93 | 164,485 |
| Flags of Countries That Border Russia | 0 | - | 4.70 | 70,173 |
| Non-Bordering Countries Closest to Russia | 0 | - | 4.91 | 82,372 |
| Biggest Trading Partners - Russia | 0 | - | 4.55 | 36,334 |
| Countries that Beat Russia | 0 | - | 4.84 | 81,886 |
| Countries With the Most Russian Speakers | 0 | - | 4.97 | 98,461 |
| 100 Biggest Soviet Cities in 1989 with a Map | 0 | - | 4.97 | 29,581 |
| Countries Bordering Ukraine, with an Empty Map | 0 | - | 4.86 | 95,900 |
| Countries that Border Hungary | 0 | - | 4.98 | 103,697 |
| North Macedonia Country Quiz | 0 | - | 4.81 | 27,615 |
| Moldova Country Quiz | 0 | - | 4.81 | 30,538 |
| Countries Bordering Serbia | 0 | - | 4.96 | 91,745 |
| Andorra Country Quiz | 0 | - | 4.90 | 31,394 |
| Countries Bordering Austria | 0 | - | 4.97 | 117,776 |
| Modern Day Countries of Austria-Hungary on a Map | 0 | - | 4.98 | 102,616 |
| Countries that Visit France the Most | 0 | - | 4.85 | 45,529 |
| Countries Closest to Metropolitan France | 0 | - | 4.89 | 71,804 |
| Germany A-Z | 0 | - | 4.56 | 62,318 |
| Countries that Beat Germany | 0 | - | 4.95 | 105,373 |
| Countries With the Most German Speakers | 0 | - | 4.89 | 94,317 |
| Olympian Gods Quiz | 0 | - | 4.96 | 496,097 |
| The Trojan War | 0 | - | 4.83 | 39,425 |
| Letters of the Greek Alphabet | 0 | - | 4.97 | 641,868 |
| Name that Greek Letter | 0 | - | 4.94 | 321,652 |
| Greek Mythology General Knowledge #1 | 0 | - | 4.85 | 110,533 |
| Counties of Ireland | 0 | - | 4.92 | 193,063 |
| Italy A-Z | 0 | - | 4.49 | 57,719 |
| Countries Bordering Italy | 0 | - | 4.94 | 100,449 |
| Countries that Beat Italy | 0 | - | 4.85 | 53,871 |
| Countries Closest to Italy | 0 | - | 4.97 | 196,317 |
| Ancient Roman Trivia #1 | 0 | - | 4.85 | 84,044 |
| Roman Emperors | 0 | - | 4.95 | 118,482 |
| Countries Closest to Iceland | 0 | - | 4.89 | 72,847 |
| Countries that Beat Iceland | 0 | - | 4.81 | 42,344 |
| Countries that Beat Portugal | 0 | - | 4.86 | 58,673 |
| Geography of the Spanish Empire | 0 | - | 4.49 | 37,024 |
| Countries Closest to Spain | 0 | - | 4.96 | 225,300 |
| Countries that Beat Spain | 0 | - | 4.94 | 62,463 |
| Arthurian Legend | 0 | - | 4.33 | 25,050 |
| Countries that Visit the UK the Most | 0 | - | 4.87 | 74,262 |
| The United States... or the United Kingdom? | 0 | - | 4.87 | 97,836 |
| Biggest Trading Partners – United Kingdom | 0 | - | 4.92 | 79,509 |
| Counties of the UK and Ireland | 0 | - | 4.98 | 128,601 |
| Monty Python Quotes | 0 | - | 4.88 | 42,323 |
| Ultimate Harry Potter Name Game | 0 | - | 4.94 | 491,401 |
| Anglo-Saxon Kingdoms of England | 0 | - | 4.60 | 25,686 |
| Embarrassing Chapters in British History | 0 | - | 4.29 | 32,121 |
| British History A-Z #1 | 0 | - | 4.45 | 45,807 |
| Giant Great Britain Millennium Quiz | 0 | - | 4.78 | 20,073 |
| Houses of British Monarchs | 0 | - | 4.53 | 65,291 |
| English First Names of the Middle Ages | 0 | - | 4.47 | 60,319 |
| British History Multiple Choice #1 | 0 | - | 4.46 | 54,952 |
| British History Multiple Choice #2 | 0 | - | 4.42 | 37,831 |
| British History Quiz for Dummies | 0 | - | 4.70 | 78,104 |
| History of Scotland | 0 | - | 4.51 | 21,002 |
| World Capitals Closest to London | 0 | - | 4.87 | 109,725 |
| 50 Busiest Air Routes from London | 0 | - | 4.86 | 95,765 |
| Zone 1 London Underground Stations - With a Map | 0 | - | 4.90 | 51,948 |
| 2025–2026 Football League Teams | 0 | - | 4.93 | 397,172 |
| Top 4 in English Football, 1888–2025 | 0 | - | 4.92 | 139,119 |
