| Prime Ministers of the UK | 0 | - | 4.96 | 434,336 |
| Countries Most-Visited By Queen Elizabeth II | 0 | - | 4.40 | 51,456 |
| Roman Numeral Decoding Quiz | 0 | - | 4.94 | 433,275 |
| U.S. Presidents Quiz | 0 | - | 5.00 | 3,650,644 |
| Prime Ministers of Australia | 0 | - | 4.50 | 31,658 |
| Soviet Leaders 1917–1991 | 0 | - | 4.43 | 94,388 |
| Countries "Ruled" by King Charles III | 0 | - | 4.77 | 82,586 |
| Name the Popes Quiz | 0 | - | 4.47 | 137,024 |
| Countries of the Popes | 0 | - | 4.79 | 127,121 |
| Figures from Greek Mythology | 0 | - | 4.91 | 184,778 |
| The Dictator Files: Benito Mussolini | 0 | - | 4.65 | 23,300 |
| Modern Day Countries of Nazi Germany on a Map | 0 | - | 4.97 | 143,074 |
| James Bond Countries Visited Map | 0 | - | 4.99 | 63,362 |
| Commonwealth of Nations Countries | 0 | - | 4.94 | 236,124 |
| Country by Photo of its Leader | 0 | - | 4.74 | 123,194 |
| U.S. Presidents by Picture | 0 | - | 4.87 | 423,429 |
| Canadian Prime Ministers | 0 | - | 4.63 | 56,995 |
| Biggest Trading Partners – United Kingdom | 0 | - | 4.92 | 79,455 |
| U.S. Vice Presidents | 0 | - | 4.41 | 134,817 |
| U.S. Presidential Trivia #1 | 0 | - | 4.45 | 107,884 |
| U.S. Presidents by Event | 0 | - | 4.58 | 33,398 |
| Losing U.S. Presidential Candidates in History | 0 | - | 4.61 | 92,942 |
| Presidential Middle Names | 0 | - | 4.41 | 59,658 |
| First Names of U.S. Presidents | 0 | - | 4.85 | 379,420 |
| U.S. Presidential Trivia #2 | 0 | - | 4.49 | 52,689 |
| Assassinated U.S. Presidents | 0 | - | 4.61 | 93,768 |
| Ten Least Guessed U.S. Presidents | 0 | - | 4.45 | 38,149 |
| Name a Valid U.S. President #1 | 0 | - | 4.89 | 189,684 |
| Play-Doh Presidents | 0 | - | 5.00 | 81,632 |
| U.S. States or European Countries by GDP | 0 | - | 4.98 | 87,971 |
| Countries of the Soviet Union | 0 | - | 4.98 | 193,748 |
| Two Letter Roman Numerals | 0 | - | 4.97 | 55,581 |
| People in Pictures with Queen Elizabeth II | 0 | - | 4.38 | 29,011 |
| Pope Facts | 0 | - | 4.39 | 31,022 |
| Paramount Leaders of China | 0 | - | 4.36 | 10,995 |
| U.S. Citizenship Test Questions | 0 | - | 4.83 | 238,235 |
| U.S. Presidents Who Died in Office | 0 | - | 4.77 | 34,720 |
| Top 10 Oldest African Countries | 0 | - | 4.88 | 27,411 |
| Countries of Europe in 1815 With a Map | 0 | - | 4.99 | 148,836 |
| Countries of Europe in 1848 | 0 | - | 4.98 | 75,340 |
| Countries of Europe in 1870 with a Map | 0 | - | 4.95 | 63,299 |
| Every Country of Europe Since 1815 With a Map | 0 | - | 4.98 | 70,035 |
| Countries of Europe in 1360 with a Map | 0 | - | 4.99 | 55,948 |
| Soviet Union Country Quiz | 0 | - | 4.90 | 80,197 |
| Roman to Greek God | 0 | - | 4.52 | 122,151 |
| Countries in the Byzantine Empire | 0 | - | 4.95 | 71,705 |
| Biggest British Empire Countries | 0 | - | 4.73 | 87,255 |
| Shakespeare's Plays Quiz | 0 | - | 4.38 | 385,545 |
| The Dictator Files: Saddam Hussein | 0 | - | 4.48 | 15,747 |
| The Dictator Files: Chairman Mao | 0 | - | 4.28 | 20,567 |
| Countries of the Mongol Empire on a Map | 0 | - | 4.99 | 105,763 |
| African Countries with the Most Christians | 0 | - | 4.94 | 74,813 |
| U.S. Cabinet Departments | 0 | - | 4.86 | 72,498 |
| U.S. Bill of Rights | 0 | - | 4.53 | 32,366 |
| U.S. Governors Who Ran For President | 0 | - | 4.47 | 20,160 |
| First Ladies of the United States | 0 | - | 4.28 | 85,213 |
| The Franklin D. Roosevelt Presidency | 0 | - | 4.43 | 23,809 |
| The Abraham Lincoln Presidency | 0 | - | 4.52 | 26,102 |
| U.S. Presidents in Order - Whammies | 0 | - | 4.32 | 76,212 |
| U.S. Vice Presidents Who Became President | 0 | - | 4.64 | 15,992 |
| Add a Letter - Make a U.S. President | 0 | - | 4.61 | 23,821 |
| Deadliest U.S. Wars | 0 | - | 4.89 | 189,168 |
| Shortest U.S. Presidential Terms | 0 | - | 4.75 | 12,676 |
| Every European Country Shape | 0 | - | 4.96 | 199,975 |
| The Dictator Files: Joseph Stalin | 0 | - | 4.37 | 48,270 |
| The Dictator Files: Vladimir Lenin | 0 | - | 4.45 | 26,622 |
| States of the German Confederation in 1848 | 0 | - | 4.89 | 31,498 |
| Letters of the Greek Alphabet | 0 | - | 4.97 | 641,461 |
| Name that Greek Letter | 0 | - | 4.94 | 321,496 |
| Modern Day Countries of the Dutch Empire on a Map | 0 | - | 4.87 | 60,320 |
| Countries of Iberia in History with a Map | 0 | - | 4.87 | 41,097 |
| Modern Day Countries of the Spanish Empire on a Map | 0 | - | 4.95 | 85,441 |
| Modern-Day Countries of the British Empire in 1921 | 0 | - | 4.99 | 116,166 |
| Name the English Monarchs | 0 | - | 4.92 | 497,600 |
| Top 100 UK Baby Girls' Names in 1850 | 0 | - | 4.35 | 61,486 |
| Asian Countries with the Most Christians | 0 | - | 4.85 | 96,126 |
| National Founders | 0 | - | 4.40 | 83,632 |
| Biggest Trading Partners – Australia | 0 | - | 4.93 | 60,918 |
| U.S. Presidential Running Mates | 0 | - | 4.40 | 28,455 |
| US Presidents - One Minute Sprint | 0 | - | 4.41 | 303,270 |
| The Thomas Jefferson Presidency | 0 | - | 4.26 | 13,653 |
| Random U.S. Vice President to President | 0 | - | 4.39 | 30,456 |
| The John Adams Presidency | 0 | - | 4.12 | 8,674 |
| The Theodore Roosevelt Presidency | 0 | - | 4.39 | 7,678 |
| Name a Valid U.S. President #2 | 0 | - | 4.54 | 69,346 |
| U.S. Vice Presidential Trivia | 0 | - | 4.26 | 12,766 |
| The American Revolution | 0 | - | 4.52 | 54,042 |
| U.S. States or European Countries by Area | 0 | - | 4.94 | 94,611 |
| Biggest Countries in Europe in 1700 | 0 | - | 4.73 | 58,113 |
| Neutral European Countries of WWII | 0 | - | 4.91 | 160,399 |
| U.S. States or European Countries by Population | 0 | - | 4.97 | 131,836 |
| Biggest Trading Partners - Germany | 0 | - | 4.97 | 70,721 |
| Olympian Gods Quiz | 0 | - | 4.96 | 495,361 |
| The Trojan War | 0 | - | 4.83 | 39,404 |
| Ancient Greek Words | 0 | - | 4.92 | 110,608 |
| Greek Mythology General Knowledge #1 | 0 | - | 4.85 | 110,434 |
| Things with Names from Classical Mythology | 0 | - | 4.28 | 87,143 |
| 101 Figures from Greek Mythology | 0 | - | 4.99 | 124,145 |
| Ancient Roman Trivia #1 | 0 | - | 4.85 | 84,009 |
| Roman Emperors | 0 | - | 4.95 | 118,358 |
| Biggest Trading Partners - Spain | 0 | - | 4.91 | 53,491 |
| Shakespeare Quotes | 0 | - | 4.43 | 71,107 |
| Lord of the Rings Characters | 0 | - | 4.54 | 112,656 |
| 10 Plagues of Egypt | 0 | - | 4.41 | 47,688 |
| Prime Ministers of Israel | 0 | - | 3.97 | 17,811 |
| Biggest Trading Partners - China | 0 | - | 4.95 | 74,650 |
| Colonies of Africa with a Map | 0 | - | 4.77 | 53,905 |
| The Dictator Files: Fidel Castro | 0 | - | 4.19 | 12,250 |
| All U.S. Supreme Court Justices | 0 | - | 4.54 | 28,874 |
| All U.S. Supreme Court Justices Ever | 0 | - | 4.49 | 11,667 |
| The George Washington Presidency | 0 | - | 4.03 | 14,469 |
| Franklin... or Theodore Roosevelt | 0 | - | 4.35 | 16,863 |
| U.S. Presidents to Win the Nobel Peace Prize | 0 | - | 4.34 | 18,199 |
| U.S. Presidential Knowledge - Multiple Choice | 0 | - | 4.36 | 21,604 |
| Confederate States of the U.S. Civil War | 0 | - | 4.91 | 128,642 |
| Category Elimination - U.S. States #1 | 0 | - | 4.87 | 218,168 |
| Category Elimination - U.S. States #2 | 0 | - | 4.82 | 132,347 |
| European Secessionist Movements on a Map | 0 | - | 4.53 | 34,726 |
| Random European Countries on a Map | 0 | - | 4.97 | 281,799 |
| Random Sequential European Countries on a Map | 0 | - | 4.99 | 216,072 |
| Europe Map with Random Merged Countries | 0 | - | 4.97 | 315,535 |
| Countries of Europe After World War II | 0 | - | 4.99 | 186,613 |
| Countries of Europe Before World War I | 0 | - | 4.99 | 155,263 |
| History of Russia Quiz | 0 | - | 4.49 | 31,781 |
| Countries Invaded by the USSR | 0 | - | 4.29 | 93,503 |
| States of the Holy Roman Empire in 1356 | 0 | - | 4.97 | 72,380 |
| Modern Countries Conquered by Alexander the Great | 0 | - | 4.90 | 105,277 |
| History of Italy | 0 | - | 4.55 | 31,806 |
| Count in Roman Numerals - 30 Second Sprint | 0 | - | 4.26 | 101,391 |
| Geography of the Dutch Empire | 0 | - | 4.62 | 34,470 |
| Countries of the Spanish Empire | 0 | - | 4.52 | 76,966 |
| Real Madrid 2010s Starting XI | 0 | - | 4.89 | 66,052 |
| Arthurian Legend | 0 | - | 4.33 | 25,047 |
| Invasions of Great Britain | 0 | - | 4.51 | 59,368 |
| Groups of Things - Harry Potter | 0 | - | 4.82 | 280,017 |
| Tolkien's Middle Earth Map Quiz | 0 | - | 4.91 | 37,075 |
| Vatican City Country Quiz | 0 | - | 4.53 | 43,977 |
| Vietnam War Countries | 0 | - | 4.83 | 93,560 |
| Countries of the Japanese Empire | 0 | - | 4.97 | 103,833 |
| Communist Countries in History | 0 | - | 4.63 | 492,249 |
| History of India | 0 | - | 4.61 | 21,271 |
| Countries that Bordered British India with an Empty Map | 0 | - | 4.68 | 55,144 |
| Countries of Africa | 0 | - | 5.00 | 2,505,793 |
| Africa Map Quiz | 0 | - | 5.00 | 2,103,358 |
| African Countries by First 2 Letters | 0 | - | 4.96 | 266,401 |
| History of South Africa | 0 | - | 4.60 | 17,598 |
| Oceania Map Quiz | 0 | - | 4.98 | 634,792 |
| Australian Capitals | 0 | - | 4.92 | 62,587 |
| Australia Map Quiz | 0 | - | 4.94 | 342,336 |
| History of Mexico | 0 | - | 4.58 | 15,224 |
| United States Map Quiz | 0 | - | 4.98 | 4,140,397 |
| Arms Exports - United States | 0 | - | 4.70 | 54,302 |
| U.S. Federal Agency Acronyms | 0 | - | 4.50 | 79,719 |
| Red State or Blue State Trait? | 0 | - | 4.42 | 54,907 |
| Win the U.S. Presidential Election | 0 | - | 4.80 | 617,854 |
| U.S. Presidential Quotes | 0 | - | 4.37 | 44,352 |
| The George W. Bush Presidency | 0 | - | 4.06 | 32,081 |
| US Presidents Breakdown Puzzle #1 | 0 | - | 3.69 | 19,956 |
| People in Pictures with Ronald Reagan | 0 | - | 4.35 | 40,430 |
| U.S. President Scramble | 0 | - | 4.40 | 116,156 |
| U.S. Presidents True or False | 0 | - | 3.96 | 15,524 |
| U.S. Presidents With Facial Hair By Picture | 0 | - | 4.48 | 23,010 |
| U.S. Presidential Last Names as Baby Names | 0 | - | 4.19 | 33,346 |
| Random U.S. Presidents by Picture | 0 | - | 4.39 | 65,776 |
| People in Pictures with Barack Obama | 0 | - | 4.10 | 47,680 |
| The Kennedy Family | 0 | - | 3.90 | 14,021 |
| U.S. History for Dummies | 0 | - | 4.47 | 82,427 |
| The American Civil War | 0 | - | 4.62 | 52,108 |
| Count to 10 in Europe: Pro | 0 | - | 4.85 | 68,546 |
| Biggest European Cities by Letter | 0 | - | 4.55 | 126,197 |
| Europe Cities Map Quiz | 0 | - | 4.99 | 362,158 |
| Official European Union Languages | 0 | - | 4.97 | 236,418 |
| European Countries in their Native Language | 0 | - | 4.99 | 156,634 |
| Europe Map Quiz | 0 | - | 5.00 | 4,728,887 |
| European Countries by First 2 Letters | 0 | - | 4.95 | 526,146 |
| Europe by Borders in 30 Seconds | 0 | - | 4.98 | 424,976 |
| Save Europeans by Guessing Countries | 0 | - | 4.84 | 209,192 |
| History of Austria | 0 | - | 4.70 | 17,742 |
| Geography of the French Empire | 0 | - | 4.48 | 26,920 |
| The French Revolution | 0 | - | 4.46 | 23,761 |
| History of France | 0 | - | 4.59 | 55,942 |
| French History Multiple Choice | 0 | - | 4.55 | 32,861 |
| Biggest Cities in Germany in 1910 | 0 | - | 4.41 | 23,378 |
| Ancient Greek Trivia | 0 | - | 4.62 | 66,752 |
| Geography of Ancient Greece | 0 | - | 4.69 | 31,762 |
| Greek Mythology General Knowledge #2 | 0 | - | 4.59 | 72,835 |
| Ancient Greece - Multiple Choice | 0 | - | 4.54 | 41,414 |
| Countries Italy Declared War On | 0 | - | 4.75 | 42,921 |
| Ancient Roman Trivia #2 | 0 | - | 4.57 | 38,522 |
| Geography of the Roman Empire | 0 | - | 4.56 | 51,649 |
| Roman Names for Places | 0 | - | 4.62 | 57,847 |
| Byzantine History | 0 | - | 4.91 | 28,597 |
| History of The Netherlands | 0 | - | 4.46 | 17,304 |
| The Vikings! | 0 | - | 4.45 | 28,237 |
| The Portuguese Empire | 0 | - | 4.54 | 11,984 |
| Geography of the Spanish Empire | 0 | - | 4.49 | 37,006 |
| Biggest Urban Areas in the UK | 0 | - | 4.42 | 175,745 |
| Biggest Cities in the Commonwealth of Nations | 0 | - | 4.61 | 65,298 |
| Biggest Cities in the UK | 0 | - | 4.48 | 104,093 |
| Do You Even Know Anything About Shakespeare? | 0 | - | 4.57 | 34,190 |
