| U.S. Presidents Quiz | 0 | - | 5.00 | 3,720,461 |
| Name a Valid U.S. President #1 | 0 | - | 4.89 | 193,482 |
| U.S. Presidents by Picture | 0 | - | 4.87 | 428,100 |
| First Names of U.S. Presidents | 0 | - | 4.86 | 383,276 |
| Play-Doh Presidents | 0 | - | 5.00 | 82,777 |
| U.S. Presidential Trivia #1 | 0 | - | 4.45 | 109,247 |
| U.S. Presidents by Event | 0 | - | 4.58 | 35,166 |
| Losing U.S. Presidential Candidates in History | 0 | - | 4.62 | 94,509 |
| Presidential Middle Names | 0 | - | 4.41 | 60,650 |
| U.S. Presidential Trivia #2 | 0 | - | 4.49 | 53,586 |
| Assassinated U.S. Presidents | 0 | - | 4.63 | 94,847 |
| Ten Least Guessed U.S. Presidents | 0 | - | 4.45 | 38,593 |
| Win the 1828 U.S. Presidential Election | 0 | - | 4.30 | 54,691 |
| Prime Ministers of the UK | 0 | - | 4.95 | 441,668 |
| US Presidents - One Minute Sprint | 0 | - | 4.41 | 306,012 |
| U.S. Presidents Who Died in Office | 0 | - | 4.77 | 35,168 |
| Name a Valid U.S. President #2 | 0 | - | 4.54 | 70,488 |
| Soviet Leaders 1917–1991 | 0 | - | 4.44 | 95,437 |
| James Bond Countries Visited Map | 0 | - | 4.99 | 64,635 |
| Name the Popes Quiz | 0 | - | 4.47 | 138,784 |
| Countries of the Popes | 0 | - | 4.79 | 128,605 |
| U.S. Vice Presidents | 0 | - | 4.39 | 136,841 |
| U.S. Governors Who Ran For President | 0 | - | 4.47 | 20,345 |
| U.S. Presidential Running Mates | 0 | - | 4.41 | 28,739 |
| First Ladies of the United States | 0 | - | 4.28 | 85,900 |
| The Abraham Lincoln Presidency | 0 | - | 4.52 | 26,293 |
| U.S. Presidents in Order by First Letter | 0 | - | 4.32 | 77,410 |
| U.S. Vice Presidents Who Became President | 0 | - | 4.64 | 16,334 |
| Add a Letter - Make a U.S. President | 0 | - | 4.58 | 24,076 |
| Olympian Gods Quiz | 0 | - | 4.96 | 503,194 |
| Ultimate Harry Potter Name Game | 0 | - | 4.94 | 494,461 |
| Shortest U.S. Presidential Terms | 0 | - | 4.75 | 12,926 |
| The Franklin D. Roosevelt Presidency | 0 | - | 4.43 | 24,044 |
| U.S. President Scramble | 0 | - | 4.40 | 117,372 |
| People in Pictures with Barack Obama | 0 | - | 4.10 | 48,058 |
| U.S. States or European Countries by GDP | 0 | - | 4.98 | 89,572 |
| States of the German Confederation in 1848 | 0 | - | 4.90 | 32,372 |
| Modern Countries Conquered by Alexander the Great | 0 | - | 4.90 | 105,799 |
| Roman Numeral Decoding Quiz | 0 | - | 4.94 | 439,246 |
| Two Letter Roman Numerals | 0 | - | 4.97 | 56,440 |
| Biggest English Cities by Century | 0 | - | 4.91 | 106,645 |
| Tolkien's Middle Earth Map Quiz | 0 | - | 4.92 | 38,134 |
| U.S. Citizenship Test Questions | 0 | - | 4.83 | 240,661 |
| Countries of Europe in 1815 With a Map | 0 | - | 4.99 | 151,154 |
| Countries of Europe in 1848 | 0 | - | 4.98 | 84,905 |
| Countries of Europe in 1870 with a Map | 0 | - | 4.95 | 65,570 |
| Every Country of Europe Since 1815 With a Map | 0 | - | 4.98 | 71,688 |
| Countries of Europe in 1360 with a Map | 0 | - | 4.99 | 57,442 |
| Most-Mentioned Characters in the Iliad | 0 | - | 4.81 | 20,934 |
| Country by Photo of its Leader | 0 | - | 4.70 | 124,526 |
| Prime Ministers of Australia | 0 | - | 4.51 | 32,161 |
| U.S. Cabinet Departments | 0 | - | 4.86 | 73,057 |
| The George Washington Presidency | 0 | - | 4.03 | 14,595 |
| The Thomas Jefferson Presidency | 0 | - | 4.26 | 13,769 |
| Random U.S. Vice President to President | 0 | - | 4.39 | 30,738 |
| The John Adams Presidency | 0 | - | 4.12 | 8,778 |
| Franklin... or Theodore Roosevelt | 0 | - | 4.35 | 16,976 |
| The Theodore Roosevelt Presidency | 0 | - | 4.39 | 7,768 |
| U.S. Presidents to Win the Nobel Peace Prize | 0 | - | 4.34 | 18,370 |
| U.S. Presidential Knowledge - Multiple Choice | 0 | - | 4.36 | 21,747 |
| U.S. Vice Presidential Trivia | 0 | - | 4.26 | 12,910 |
| Deadliest U.S. Wars | 0 | - | 4.89 | 191,615 |
| Canadian Prime Ministers | 0 | - | 4.64 | 57,832 |
| Byzantine History | 0 | - | 4.91 | 28,998 |
| Byzantine Emperors | 0 | - | 4.93 | 14,527 |
| Modern Day Countries of the Dutch Empire on a Map | 0 | - | 4.86 | 61,550 |
| Countries of Iberia in History with a Map | 0 | - | 4.88 | 42,294 |
| Modern Day Countries of the Spanish Empire on a Map | 0 | - | 4.95 | 86,765 |
| Modern-Day Countries of the British Empire in 1921 | 0 | - | 4.99 | 118,539 |
| Name the English Monarchs | 0 | - | 4.91 | 505,655 |
| Countries of the Mongol Empire on a Map | 0 | - | 4.99 | 107,376 |
| National Founders | 0 | - | 4.40 | 83,941 |
| U.S. Presidential Quotes | 0 | - | 4.37 | 44,589 |
| The George W. Bush Presidency | 0 | - | 4.06 | 32,260 |
| People in Pictures with Ronald Reagan | 0 | - | 4.35 | 40,894 |
| U.S. Presidents With Facial Hair By Picture | 0 | - | 4.48 | 23,310 |
| Biggest Countries in Europe in 1700 | 0 | - | 4.73 | 58,708 |
| The Trojan War | 0 | - | 4.83 | 39,944 |
| Letters of the Greek Alphabet | 0 | - | 4.97 | 650,967 |
| Name that Greek Letter | 0 | - | 4.93 | 324,754 |
| Greek Mythology General Knowledge #1 | 0 | - | 4.85 | 112,751 |
| 101 Figures from Greek Mythology | 0 | - | 4.99 | 127,233 |
| The Dictator Files: Benito Mussolini | 0 | - | 4.65 | 23,551 |
| Ancient Roman Trivia #1 | 0 | - | 4.85 | 85,513 |
| Roman Emperors | 0 | - | 4.95 | 120,974 |
| Basic Harry Potter Quiz | 0 | - | 4.56 | 379,508 |
| 2026–2027 English Premier League Teams | 0 | - | 4.84 | 869,272 |
| Vatican City Country Quiz | 0 | - | 4.53 | 44,605 |
| Most-Visited Countries by Popes | 0 | - | 4.56 | 84,088 |
| Pope Facts | 0 | - | 4.39 | 31,355 |
| U.S. Presidential Last Names as Baby Names | 0 | - | 4.19 | 33,776 |
| Random U.S. Presidents by Picture | 0 | - | 4.40 | 66,521 |
| History of Russia Quiz | 0 | - | 4.47 | 31,990 |
| Flags of Countries That Border France | 0 | - | 4.89 | 123,660 |
| Flags of Countries that Border Germany | 0 | - | 4.86 | 97,744 |
| Countries of the German Empire | 0 | - | 4.51 | 38,123 |
| States of the Holy Roman Empire in 1356 | 0 | - | 4.98 | 75,053 |
| Ancient Greek Words | 0 | - | 4.93 | 112,298 |
| History of Italy | 0 | - | 4.55 | 32,117 |
| Geography of the Dutch Empire | 0 | - | 4.62 | 34,791 |
| Countries of the Spanish Empire | 0 | - | 4.52 | 77,401 |
| Countries Closest to Spain A-Z | 0 | - | 4.98 | 108,663 |
| Invasions of Great Britain | 0 | - | 4.51 | 60,054 |
| Countries Closest to the United Kingdom A-Z | 0 | - | 4.96 | 191,514 |
| Harry Potter: Voldemort's Horcruxes | 0 | - | 4.45 | 113,012 |
| Name Every Beatles Song | 0 | - | 4.97 | 237,987 |
| Bohemian Rhapsody Lyrics | 0 | - | 4.98 | 292,633 |
| The Dictator Files: Saddam Hussein | 0 | - | 4.48 | 15,916 |
| 10 Plagues of Egypt | 0 | - | 4.41 | 53,896 |
| Colonies of Africa with a Map | 0 | - | 4.79 | 54,691 |
| History of South Africa | 0 | - | 4.60 | 17,745 |
| All U.S. Supreme Court Justices | 0 | - | 4.54 | 29,132 |
| All U.S. Supreme Court Justices Ever | 0 | - | 4.50 | 11,854 |
| The Bill Clinton Presidency | 0 | - | 4.24 | 31,517 |
| The George H. W. Bush Presidency | 0 | - | 4.36 | 21,541 |
| The Ronald Reagan Presidency | 0 | - | 4.26 | 24,875 |
| US Presidents Breakdown Puzzle #1 | 0 | - | 3.69 | 20,140 |
| U.S. Presidents True or False | 0 | - | 3.96 | 15,639 |
| The Barack Obama Presidency | 0 | - | 4.13 | 25,485 |
| The Kennedy Family | 0 | - | 3.90 | 14,093 |
| Confederate States of the U.S. Civil War | 0 | - | 4.91 | 129,558 |
| Europe Map Quiz | 0 | - | 5.00 | 4,782,278 |
| European Countries by First 2 Letters | 0 | - | 4.95 | 531,974 |
| European Secessionist Movements on a Map | 0 | - | 4.53 | 35,148 |
| Save Europeans by Guessing Countries | 0 | - | 4.86 | 216,105 |
| 25 Biggest Cities of the Soviet Union | 0 | - | 4.94 | 84,820 |
| Countries of the Soviet Union | 0 | - | 4.98 | 195,429 |
| Countries Invaded by the USSR | 0 | - | 4.29 | 94,350 |
| Soviet Union Country Quiz | 0 | - | 4.91 | 81,064 |
| The Dictator Files: Vladimir Lenin | 0 | - | 4.45 | 26,915 |
| History of Austria | 0 | - | 4.70 | 17,962 |
| Geography of the French Empire | 0 | - | 4.45 | 27,201 |
| The French Revolution | 0 | - | 4.47 | 24,124 |
| History of France | 0 | - | 4.61 | 57,506 |
| Biggest Cities in Germany in 1910 | 0 | - | 4.41 | 23,548 |
| Countries Closest to Germany A-Z | 0 | - | 4.98 | 27,527 |
| Modern Day Countries of Nazi Germany on a Map | 0 | - | 4.97 | 145,417 |
| Mythology A-Z | 0 | - | 4.31 | 37,363 |
| Figures from Greek Mythology | 0 | - | 4.91 | 188,493 |
| Least Irish U.S. States | 0 | - | 4.49 | 18,382 |
| Biggest Cities Once in the Roman Empire | 0 | - | 4.81 | 76,047 |
| Modern-Day Countries of the Roman Empire on a Map | 0 | - | 4.99 | 126,578 |
| Count in Roman Numerals - 30 Second Sprint | 0 | - | 4.27 | 103,595 |
| The Vikings! | 0 | - | 4.46 | 28,397 |
| The Portuguese Empire | 0 | - | 4.58 | 12,096 |
| Name the Harry Potter Books | 0 | - | 4.31 | 280,445 |
| Harry Potter Spells | 0 | - | 4.33 | 139,990 |
| Harry Potter Places | 0 | - | 4.35 | 108,644 |
| Harry Potter - Order of the Phoenix Members | 0 | - | 4.06 | 43,180 |
| Harry Potter Creatures | 0 | - | 4.30 | 64,371 |
| Wives of King Henry VIII | 0 | - | 4.55 | 53,442 |
| Countries the UK Declared War On | 0 | - | 4.55 | 123,149 |
| Geography of the British Empire | 0 | - | 4.48 | 39,825 |
| People Buried at Westminster Abbey | 0 | - | 4.67 | 14,295 |
| Places Where Winston Churchill Said We Would Fight the Nazis | 0 | - | 4.57 | 14,646 |
| Asian Countries by First 2 Letters | 0 | - | 4.92 | 280,388 |
| History of Iran | 0 | - | 4.66 | 16,409 |
| Vietnam War Countries | 0 | - | 4.82 | 94,529 |
| History of China | 0 | - | 4.35 | 57,501 |
| Paramount Leaders of China | 0 | - | 4.36 | 11,119 |
| The Dictator Files: Chairman Mao | 0 | - | 4.28 | 20,738 |
| History of India | 0 | - | 4.62 | 21,494 |
| African Countries by First 2 Letters | 0 | - | 4.96 | 269,117 |
| Communist Countries in History | 0 | - | 4.63 | 497,639 |
| Political Movements by Country | 0 | - | 4.46 | 72,717 |
| Anglo-Saxon and Viking Kings of England | 0 | - | 4.74 | 12,313 |
| Oceania Map Quiz | 0 | - | 4.98 | 658,308 |
| Oceanian Capitals - Map Quiz | 0 | - | 4.95 | 51,325 |
| Australian Capitals | 0 | - | 4.92 | 62,811 |
| Australia Map Quiz | 0 | - | 4.95 | 345,871 |
| History of Mexico | 0 | - | 4.52 | 15,358 |
| The Dictator Files: Fidel Castro | 0 | - | 4.19 | 12,381 |
| United States Map Quiz | 0 | - | 4.98 | 4,168,628 |
| U.S. Federal Agency Acronyms | 0 | - | 4.50 | 80,107 |
| U.S. States by Governor | 0 | - | 4.43 | 18,109 |
| U.S. Bill of Rights | 0 | - | 4.53 | 32,583 |
| U.S. Political Parties in History | 0 | - | 4.44 | 27,751 |
| U.S. Government Agencies | 0 | - | 4.44 | 19,760 |
| Red State or Blue State Trait? | 0 | - | 4.42 | 55,633 |
| Win the U.S. Presidential Election | 0 | - | 4.78 | 634,188 |
| Events in U.S. History | 0 | - | 4.41 | 28,792 |
| Embarrassing Chapters in US History | 0 | - | 4.17 | 33,180 |
| U.S. History for Dummies | 0 | - | 4.47 | 83,346 |
| The American Civil War | 0 | - | 4.62 | 52,598 |
| Mediterranean Countries Quiz | 0 | - | 4.99 | 213,574 |
| Countries with Territorial Claims in Antarctica | 0 | - | 4.94 | 92,859 |
| Countries That Use the Euro | 0 | - | 4.95 | 106,426 |
| Count to 10 in Europe: Pro | 0 | - | 4.86 | 69,608 |
| Europe Cities Map Quiz | 0 | - | 4.99 | 365,870 |
| Official European Union Languages | 0 | - | 4.97 | 239,521 |
| European Countries in their Native Language | 0 | - | 4.99 | 158,508 |
| Europe Geography Decoder | 0 | - | 4.86 | 70,250 |
| 10 Easternmost Countries in Europe | 0 | - | 4.87 | 116,825 |
| Europe by Borders in 30 Seconds | 0 | - | 4.98 | 430,392 |
| The Only European Country ... | 0 | - | 4.91 | 218,524 |
| European Countries NOT in NATO | 0 | - | 4.91 | 62,241 |
| 100 Biggest Soviet Cities in 1989 with a Map | 0 | - | 4.97 | 30,012 |
| French History Multiple Choice | 0 | - | 4.55 | 33,194 |
| History of Germany | 0 | - | 4.39 | 52,957 |
| Ancient Greek Trivia | 0 | - | 4.62 | 67,191 |
