| Countries of the Soviet Union | 0 | - | 4.98 | 194,287 |
| Soviet Leaders 1917–1991 | 0 | - | 4.44 | 94,729 |
| Prime Ministers of the UK | 0 | - | 4.95 | 436,996 |
| Soviet Union Country Quiz | 0 | - | 4.90 | 80,503 |
| Prime Ministers of Australia | 0 | - | 4.50 | 31,806 |
| Canadian Prime Ministers | 0 | - | 4.63 | 57,324 |
| Neutral European Countries of WWII | 0 | - | 4.91 | 161,030 |
| U.S. Presidents Quiz | 0 | - | 5.00 | 3,678,834 |
| Top 10 Biggest Economies in Europe | 0 | - | 4.98 | 198,245 |
| Countries of Europe After World War II | 0 | - | 4.99 | 187,787 |
| Countries of Europe Before World War I | 0 | - | 4.99 | 156,001 |
| Modern-Day Countries of the British Empire in 1921 | 0 | - | 4.99 | 116,978 |
| Top 10 Richest Countries in Europe | 0 | - | 4.90 | 148,893 |
| Biggest Trading Partners - European Union | 0 | - | 4.91 | 72,468 |
| The Dictator Files: Joseph Stalin | 0 | - | 4.37 | 48,408 |
| Country by Photo of its Leader | 0 | - | 4.74 | 123,697 |
| U.S. Presidents by Picture | 0 | - | 4.87 | 425,300 |
| Arms Exports - Russia | 0 | - | 4.48 | 25,103 |
| Biggest Trading Partners - Germany | 0 | - | 4.97 | 71,156 |
| The Dictator Files: Benito Mussolini | 0 | - | 4.65 | 23,393 |
| Biggest Trading Partners - Spain | 0 | - | 4.91 | 53,656 |
| Biggest Trading Partners – United Kingdom | 0 | - | 4.93 | 79,960 |
| Countries Closest to the United Kingdom A-Z | 0 | - | 4.96 | 190,440 |
| Name the Popes Quiz | 0 | - | 4.47 | 137,669 |
| Countries of the Popes | 0 | - | 4.79 | 127,675 |
| National Founders | 0 | - | 4.40 | 83,754 |
| First Names of U.S. Presidents | 0 | - | 4.85 | 380,566 |
| Name a Valid U.S. President #1 | 0 | - | 4.89 | 190,910 |
| Play-Doh Presidents | 0 | - | 5.00 | 81,993 |
| Flags of Countries That Border Russia | 0 | - | 4.70 | 70,424 |
| Two Letter Roman Numerals | 0 | - | 4.97 | 55,879 |
| Paramount Leaders of China | 0 | - | 4.36 | 11,038 |
| Countries of the Japanese Empire | 0 | - | 4.97 | 104,083 |
| U.S. Citizenship Test Questions | 0 | - | 4.83 | 238,943 |
| Countries of Europe in 1650 with a Map | 0 | - | 4.95 | 68,483 |
| Countries of Europe in 1815 With a Map | 0 | - | 4.99 | 149,642 |
| Countries of Europe in 1848 | 0 | - | 4.99 | 75,948 |
| Countries of Europe in 1870 with a Map | 0 | - | 4.95 | 64,072 |
| Every Country of Europe Since 1815 With a Map | 0 | - | 4.98 | 70,561 |
| Countries of Europe in 1360 with a Map | 0 | - | 4.99 | 56,451 |
| States of the German Confederation in 1848 | 0 | - | 4.90 | 31,802 |
| UK Cities Map Quiz | 0 | - | 4.96 | 463,575 |
| Counties of England Map Quiz | 0 | - | 4.97 | 306,766 |
| All UK Parliament Constituencies on a Map | 0 | - | 4.60 | 28,667 |
| The Dictator Files: Chairman Mao | 0 | - | 4.28 | 20,633 |
| Political Movements by Country | 0 | - | 4.46 | 72,413 |
| Countries of the Mongol Empire on a Map | 0 | - | 4.99 | 106,418 |
| African Countries with the Most Christians | 0 | - | 4.94 | 75,241 |
| Top 10 Richest Countries in Africa | 0 | - | 4.85 | 75,597 |
| Top 10 Biggest Economies in Africa | 0 | - | 4.99 | 119,851 |
| U.S. Federal Agency Acronyms | 0 | - | 4.50 | 79,874 |
| All U.S. Supreme Court Justices | 0 | - | 4.54 | 29,032 |
| U.S. Cabinet Departments | 0 | - | 4.86 | 72,725 |
| U.S. Bill of Rights | 0 | - | 4.53 | 32,479 |
| All U.S. Supreme Court Justices Ever | 0 | - | 4.49 | 11,725 |
| Deadliest U.S. Wars | 0 | - | 4.89 | 190,178 |
| Every European Country Shape | 0 | - | 4.96 | 200,997 |
| Most Guessed European Capitals | 0 | - | 4.87 | 101,387 |
| Category Elimination - European Countries #1 | 0 | - | 4.89 | 89,585 |
| European Capital Superlatives - Top 2 | 0 | - | 4.94 | 80,959 |
| Biggest Cities in Russia | 0 | - | 4.49 | 82,222 |
| Countries Invaded by the USSR | 0 | - | 4.29 | 93,826 |
| Letters of the Greek Alphabet | 0 | - | 4.97 | 645,114 |
| Name that Greek Letter | 0 | - | 4.93 | 322,748 |
| Countries Italy Declared War On | 0 | - | 4.75 | 43,177 |
| Biggest Spanish Empire Countries | 0 | - | 4.91 | 115,522 |
| UK Immigration by Country | 0 | - | 4.94 | 140,465 |
| United Kingdom Country Quiz | 0 | - | 4.96 | 139,096 |
| Countries that Visit the UK the Most | 0 | - | 4.87 | 74,740 |
| Name the English Monarchs | 0 | - | 4.91 | 500,530 |
| Pope Facts | 0 | - | 4.39 | 31,149 |
| Asian Countries with the Most Christians | 0 | - | 4.85 | 96,785 |
| Top 10 Biggest Economies in Asia | 0 | - | 4.85 | 120,161 |
| Countries with the Most Hindus | 0 | - | 4.90 | 122,713 |
| Hindu Countries | 0 | - | 4.86 | 49,887 |
| Biggest Trading Partners – Australia | 0 | - | 4.93 | 61,292 |
| U.S. Presidential Trivia #1 | 0 | - | 4.45 | 108,356 |
| U.S. Presidents by Event | 0 | - | 4.58 | 34,026 |
| Losing U.S. Presidential Candidates in History | 0 | - | 4.61 | 93,404 |
| Presidential Middle Names | 0 | - | 4.41 | 59,982 |
| U.S. Presidential Trivia #2 | 0 | - | 4.49 | 53,043 |
| Assassinated U.S. Presidents | 0 | - | 4.63 | 94,273 |
| Ten Least Guessed U.S. Presidents | 0 | - | 4.45 | 38,299 |
| U.S. States or European Countries by Area | 0 | - | 4.95 | 95,485 |
| Biggest Countries in Europe in 1700 | 0 | - | 4.73 | 58,326 |
| U.S. States or European Countries by Population | 0 | - | 4.97 | 132,638 |
| Random European Flag to Country | 0 | - | 4.89 | 181,666 |
| Countries that Bordered the USSR | 0 | - | 4.93 | 164,962 |
| Biggest Trading Partners - Russia | 0 | - | 4.55 | 36,429 |
| Modern Day Countries of Austria-Hungary on a Map | 0 | - | 4.98 | 103,293 |
| The Reign of Napoleon | 0 | - | 4.54 | 38,850 |
| Olympian Gods Quiz | 0 | - | 4.96 | 498,784 |
| The Trojan War | 0 | - | 4.83 | 39,595 |
| Greek Mythology General Knowledge #1 | 0 | - | 4.85 | 111,291 |
| 101 Figures from Greek Mythology | 0 | - | 4.99 | 125,216 |
| Ancient Roman Trivia #1 | 0 | - | 4.85 | 84,330 |
| Roman Emperors | 0 | - | 4.95 | 119,420 |
| Monty Python Quotes | 0 | - | 4.88 | 42,387 |
| Commonwealth of Nations Countries | 0 | - | 4.94 | 236,969 |
| Places Where Winston Churchill Said We Would Fight the Nazis | 0 | - | 4.57 | 14,583 |
| 2025–2026 English Premier League Teams | 0 | - | 4.86 | 855,849 |
| Scotland A-Z | 0 | - | 4.73 | 41,173 |
| Biggest Trading Partners - Turkey | 0 | - | 4.81 | 50,430 |
| Prime Ministers of Israel | 0 | - | 3.97 | 17,894 |
| Biggest Trading Partners - China | 0 | - | 4.95 | 74,902 |
| Flags of WW1 | 0 | - | 4.60 | 38,200 |
| Colonies of Africa with a Map | 0 | - | 4.78 | 54,247 |
| Biggest Trading Partners - Colombia | 0 | - | 4.88 | 40,167 |
| U.S. Vice Presidents | 0 | - | 4.39 | 135,776 |
| U.S. Governors Who Ran For President | 0 | - | 4.47 | 20,210 |
| First Ladies of the United States | 0 | - | 4.28 | 85,412 |
| The Abraham Lincoln Presidency | 0 | - | 4.52 | 26,168 |
| U.S. Presidents in Order - Whammies | 0 | - | 4.32 | 76,745 |
| US Presidents - One Minute Sprint | 0 | - | 4.41 | 304,324 |
| U.S. Presidents Who Died in Office | 0 | - | 4.77 | 34,876 |
| U.S. Vice Presidents Who Became President | 0 | - | 4.64 | 16,105 |
| Name a Valid U.S. President #2 | 0 | - | 4.54 | 69,736 |
| Add a Letter - Make a U.S. President | 0 | - | 4.57 | 23,897 |
| The American Revolution | 0 | - | 4.52 | 54,167 |
| Category Elimination - U.S. States #1 | 0 | - | 4.88 | 219,863 |
| Category Elimination - U.S. States #2 | 0 | - | 4.82 | 133,504 |
| Shortest U.S. Presidential Terms | 0 | - | 4.75 | 12,747 |
| Random European Countries on a Map | 0 | - | 4.97 | 282,799 |
| Europe Map with Random Merged Countries | 0 | - | 4.97 | 316,990 |
| History of Russia Quiz | 0 | - | 4.49 | 31,859 |
| Flags of Countries That Border France | 0 | - | 4.89 | 122,526 |
| Flags of Countries that Border Germany | 0 | - | 4.86 | 96,719 |
| Countries Closest to Germany A-Z | 0 | - | 4.98 | 27,151 |
| Modern Countries Conquered by Alexander the Great | 0 | - | 4.90 | 105,470 |
| Ancient Greek Words | 0 | - | 4.93 | 111,185 |
| History of Italy | 0 | - | 4.55 | 31,911 |
| Biggest Roman Empire Countries | 0 | - | 4.87 | 101,658 |
| Modern-Day Countries of the Roman Empire on a Map | 0 | - | 4.99 | 125,352 |
| Roman Numeral Decoding Quiz | 0 | - | 4.94 | 435,426 |
| Geography of the Dutch Empire | 0 | - | 4.61 | 34,586 |
| Countries of the Spanish Empire | 0 | - | 4.52 | 77,115 |
| Countries Closest to Spain A-Z | 0 | - | 4.98 | 108,003 |
| Invasions of Great Britain | 0 | - | 4.51 | 59,750 |
| British Monopoly Board - Map Quiz | 0 | - | 4.47 | 20,175 |
| Shakespeare's Plays Quiz | 0 | - | 4.37 | 387,047 |
| The Thirteen Dwarves in the Hobbit | 0 | - | 4.81 | 28,484 |
| Tolkien's Middle Earth Map Quiz | 0 | - | 4.91 | 37,391 |
| Top 100 UK Baby Girls' Names in 1850 | 0 | - | 4.35 | 61,845 |
| People in Pictures with Queen Elizabeth II | 0 | - | 4.38 | 29,178 |
| Countries "Ruled" by King Charles III | 0 | - | 4.78 | 82,682 |
| The Vietnam War | 0 | - | 4.43 | 35,429 |
| Communist Countries in History | 0 | - | 4.63 | 494,232 |
| History of India | 0 | - | 4.61 | 21,363 |
| Countries that Bordered British India with an Empty Map | 0 | - | 4.69 | 55,343 |
| African Countries by First 2 Letters | 0 | - | 4.96 | 267,541 |
| African Countries with the Most Muslims | 0 | - | 4.80 | 100,673 |
| History of South Africa | 0 | - | 4.60 | 17,646 |
| American Political Words | 0 | - | 4.39 | 23,389 |
| U.S. Political Figures by Picture #1 | 0 | - | 4.14 | 26,127 |
| U.S. Political Figures by Picture #2 | 0 | - | 4.10 | 15,496 |
| Female Political Figures by Picture - U.S. | 0 | - | 4.20 | 10,847 |
| U.S. Presidential Quotes | 0 | - | 4.37 | 44,421 |
| The George W. Bush Presidency | 0 | - | 4.06 | 32,138 |
| The Franklin D. Roosevelt Presidency | 0 | - | 4.43 | 23,887 |
| People in Pictures with Ronald Reagan | 0 | - | 4.35 | 40,566 |
| U.S. President Scramble | 0 | - | 4.40 | 116,513 |
| U.S. Presidents With Facial Hair By Picture | 0 | - | 4.48 | 23,104 |
| People in Pictures with Barack Obama | 0 | - | 4.10 | 47,802 |
| Biggest European Cities by Letter | 0 | - | 4.54 | 126,456 |
| Europe Map Quiz | 0 | - | 5.00 | 4,748,835 |
| European Countries by First 2 Letters | 0 | - | 4.95 | 528,067 |
| European Capitals with the Least Sunshine | 0 | - | 4.46 | 50,258 |
| European Secessionist Movements on a Map | 0 | - | 4.53 | 34,872 |
| Most Forested European Countries | 0 | - | 4.80 | 75,157 |
| European Countries with NO Wolves | 0 | - | 4.56 | 65,585 |
| European Cities with the Biggest Economies | 0 | - | 4.61 | 38,316 |
| Random Sequential European Countries on a Map | 0 | - | 4.99 | 216,737 |
| Save Europeans by Guessing Countries | 0 | - | 4.83 | 211,345 |
| History of Austria | 0 | - | 4.70 | 17,815 |
| Biggest French Empire Countries | 0 | - | 4.49 | 65,059 |
| Geography of the French Empire | 0 | - | 4.45 | 27,008 |
| The French Revolution | 0 | - | 4.46 | 23,877 |
| History of France | 0 | - | 4.59 | 56,678 |
| Biggest Cities in Germany in 1910 | 0 | - | 4.41 | 23,442 |
| Modern Day Countries of Nazi Germany on a Map | 0 | - | 4.97 | 143,988 |
| Ancient Greek Trivia | 0 | - | 4.62 | 66,885 |
| Geography of Ancient Greece | 0 | - | 4.69 | 31,852 |
| Mythology A-Z | 0 | - | 4.31 | 37,126 |
| Figures from Greek Mythology | 0 | - | 4.91 | 186,013 |
| Countries in the Byzantine Empire | 0 | - | 4.95 | 71,944 |
| Byzantine History | 0 | - | 4.91 | 28,719 |
| Count in Roman Numerals - 30 Second Sprint | 0 | - | 4.26 | 102,148 |
| The Vikings! | 0 | - | 4.46 | 28,300 |
| The Portuguese Empire | 0 | - | 4.58 | 12,035 |
| Arthurian Legend | 0 | - | 4.33 | 25,083 |
| Biggest British Empire Countries | 0 | - | 4.74 | 99,574 |
| Which Country of the United Kingdom? | 0 | - | 4.58 | 39,204 |
| Top 100 UK Baby Boys' Names in 1850 | 0 | - | 4.42 | 69,615 |
| Most-Visited Countries by the British | 0 | - | 4.64 | 68,381 |
| Name the James Bond Movies | 0 | - | 4.56 | 158,137 |
| James Bond Trivia | 0 | - | 4.46 | 39,217 |
| Wives of King Henry VIII | 0 | - | 4.55 | 53,279 |
| Countries the UK Declared War On | 0 | - | 4.61 | 122,170 |
| Geography of the British Empire | 0 | - | 4.48 | 39,602 |
| Medieval English History | 0 | - | 4.53 | 43,423 |
