| Prime Ministers of the UK | 0 | - | 4.96 | 435,499 |
| Countries Most-Visited By Queen Elizabeth II | 0 | - | 4.41 | 51,532 |
| Roman Numeral Decoding Quiz | 0 | - | 4.94 | 434,352 |
| U.S. Presidents Quiz | 0 | - | 5.00 | 3,663,605 |
| Prime Ministers of Australia | 0 | - | 4.50 | 31,740 |
| Soviet Leaders 1917–1991 | 0 | - | 4.43 | 94,560 |
| Countries "Ruled" by King Charles III | 0 | - | 4.78 | 82,632 |
| Name the Popes Quiz | 0 | - | 4.47 | 137,352 |
| Countries of the Popes | 0 | - | 4.79 | 127,390 |
| Figures from Greek Mythology | 0 | - | 4.91 | 185,384 |
| The Dictator Files: Benito Mussolini | 0 | - | 4.65 | 23,340 |
| Modern Day Countries of Nazi Germany on a Map | 0 | - | 4.97 | 143,465 |
| James Bond Countries Visited Map | 0 | - | 4.99 | 63,699 |
| Commonwealth of Nations Countries | 0 | - | 4.94 | 236,608 |
| Country by Photo of its Leader | 0 | - | 4.74 | 123,432 |
| U.S. Presidents by Picture | 0 | - | 4.87 | 424,302 |
| Canadian Prime Ministers | 0 | - | 4.63 | 57,173 |
| Biggest Trading Partners – United Kingdom | 0 | - | 4.92 | 79,672 |
| U.S. Vice Presidents | 0 | - | 4.41 | 135,304 |
| U.S. Presidential Trivia #1 | 0 | - | 4.45 | 108,099 |
| U.S. Presidents by Event | 0 | - | 4.58 | 33,706 |
| Losing U.S. Presidential Candidates in History | 0 | - | 4.61 | 93,149 |
| Presidential Middle Names | 0 | - | 4.41 | 59,804 |
| First Names of U.S. Presidents | 0 | - | 4.85 | 379,954 |
| U.S. Presidential Trivia #2 | 0 | - | 4.49 | 52,850 |
| Assassinated U.S. Presidents | 0 | - | 4.63 | 93,957 |
| Ten Least Guessed U.S. Presidents | 0 | - | 4.45 | 38,220 |
| Name a Valid U.S. President #1 | 0 | - | 4.89 | 190,255 |
| Play-Doh Presidents | 0 | - | 5.00 | 81,787 |
| U.S. States or European Countries by GDP | 0 | - | 4.98 | 88,275 |
| Countries of the Soviet Union | 0 | - | 4.98 | 194,024 |
| Two Letter Roman Numerals | 0 | - | 4.97 | 55,713 |
| People in Pictures with Queen Elizabeth II | 0 | - | 4.38 | 29,090 |
| Pope Facts | 0 | - | 4.39 | 31,087 |
| Paramount Leaders of China | 0 | - | 4.36 | 11,015 |
| U.S. Citizenship Test Questions | 0 | - | 4.83 | 238,533 |
| U.S. Presidents Who Died in Office | 0 | - | 4.77 | 34,787 |
| Top 10 Oldest African Countries | 0 | - | 4.88 | 27,531 |
| Countries of Europe in 1815 With a Map | 0 | - | 4.99 | 149,195 |
| Countries of Europe in 1848 | 0 | - | 4.98 | 75,639 |
| Countries of Europe in 1870 with a Map | 0 | - | 4.95 | 63,660 |
| Every Country of Europe Since 1815 With a Map | 0 | - | 4.98 | 70,307 |
| Countries of Europe in 1360 with a Map | 0 | - | 4.99 | 56,196 |
| Soviet Union Country Quiz | 0 | - | 4.90 | 80,340 |
| States of the German Confederation in 1848 | 0 | - | 4.89 | 31,631 |
| Roman to Greek God | 0 | - | 4.52 | 122,346 |
| Countries in the Byzantine Empire | 0 | - | 4.95 | 71,807 |
| Biggest British Empire Countries | 0 | - | 4.73 | 98,963 |
| Shakespeare's Plays Quiz | 0 | - | 4.38 | 386,255 |
| The Dictator Files: Saddam Hussein | 0 | - | 4.48 | 15,775 |
| The Dictator Files: Chairman Mao | 0 | - | 4.28 | 20,596 |
| Countries of the Mongol Empire on a Map | 0 | - | 4.99 | 106,091 |
| African Countries with the Most Christians | 0 | - | 4.94 | 74,989 |
| U.S. Cabinet Departments | 0 | - | 4.86 | 72,590 |
| U.S. Bill of Rights | 0 | - | 4.53 | 32,393 |
| U.S. Governors Who Ran For President | 0 | - | 4.47 | 20,177 |
| First Ladies of the United States | 0 | - | 4.28 | 85,312 |
| The Franklin D. Roosevelt Presidency | 0 | - | 4.43 | 23,835 |
| The Abraham Lincoln Presidency | 0 | - | 4.52 | 26,131 |
| U.S. Presidents in Order - Whammies | 0 | - | 4.32 | 76,493 |
| U.S. Vice Presidents Who Became President | 0 | - | 4.64 | 16,037 |
| Add a Letter - Make a U.S. President | 0 | - | 4.61 | 23,852 |
| Deadliest U.S. Wars | 0 | - | 4.89 | 189,496 |
| Shortest U.S. Presidential Terms | 0 | - | 4.75 | 12,711 |
| Every European Country Shape | 0 | - | 4.96 | 200,492 |
| The Dictator Files: Joseph Stalin | 0 | - | 4.37 | 48,337 |
| The Dictator Files: Vladimir Lenin | 0 | - | 4.45 | 26,680 |
| Letters of the Greek Alphabet | 0 | - | 4.97 | 643,186 |
| Name that Greek Letter | 0 | - | 4.94 | 322,040 |
| Modern Day Countries of the Dutch Empire on a Map | 0 | - | 4.87 | 60,499 |
| Countries of Iberia in History with a Map | 0 | - | 4.87 | 41,231 |
| Modern Day Countries of the Spanish Empire on a Map | 0 | - | 4.95 | 85,653 |
| Modern-Day Countries of the British Empire in 1921 | 0 | - | 4.99 | 116,561 |
| Name the English Monarchs | 0 | - | 4.92 | 498,947 |
| Top 100 UK Baby Girls' Names in 1850 | 0 | - | 4.35 | 61,636 |
| Asian Countries with the Most Christians | 0 | - | 4.85 | 96,457 |
| National Founders | 0 | - | 4.40 | 83,684 |
| Biggest Trading Partners – Australia | 0 | - | 4.93 | 61,059 |
| U.S. Presidential Running Mates | 0 | - | 4.40 | 28,508 |
| US Presidents - One Minute Sprint | 0 | - | 4.41 | 303,747 |
| The Thomas Jefferson Presidency | 0 | - | 4.26 | 13,669 |
| Random U.S. Vice President to President | 0 | - | 4.39 | 30,533 |
| The John Adams Presidency | 0 | - | 4.12 | 8,688 |
| The Theodore Roosevelt Presidency | 0 | - | 4.39 | 7,693 |
| Name a Valid U.S. President #2 | 0 | - | 4.54 | 69,543 |
| U.S. Vice Presidential Trivia | 0 | - | 4.26 | 12,790 |
| The American Revolution | 0 | - | 4.52 | 54,102 |
| U.S. States or European Countries by Area | 0 | - | 4.95 | 94,995 |
| Biggest Countries in Europe in 1700 | 0 | - | 4.73 | 58,220 |
| Neutral European Countries of WWII | 0 | - | 4.91 | 160,658 |
| U.S. States or European Countries by Population | 0 | - | 4.97 | 132,182 |
| Biggest Trading Partners - Germany | 0 | - | 4.97 | 70,902 |
| Olympian Gods Quiz | 0 | - | 4.96 | 497,312 |
| The Trojan War | 0 | - | 4.83 | 39,487 |
| Ancient Greek Words | 0 | - | 4.92 | 110,894 |
| Greek Mythology General Knowledge #1 | 0 | - | 4.85 | 110,843 |
| Things with Names from Classical Mythology | 0 | - | 4.28 | 87,243 |
| 101 Figures from Greek Mythology | 0 | - | 4.99 | 124,659 |
| Ancient Roman Trivia #1 | 0 | - | 4.85 | 84,151 |
| Roman Emperors | 0 | - | 4.95 | 118,763 |
| Biggest Trading Partners - Spain | 0 | - | 4.92 | 53,559 |
| Shakespeare Quotes | 0 | - | 4.43 | 71,195 |
| Lord of the Rings Characters | 0 | - | 4.54 | 112,766 |
| 10 Plagues of Egypt | 0 | - | 4.41 | 53,537 |
| Prime Ministers of Israel | 0 | - | 3.97 | 17,841 |
| Biggest Trading Partners - China | 0 | - | 4.95 | 74,755 |
| Colonies of Africa with a Map | 0 | - | 4.78 | 54,059 |
| The Dictator Files: Fidel Castro | 0 | - | 4.19 | 12,269 |
| All U.S. Supreme Court Justices | 0 | - | 4.54 | 28,911 |
| All U.S. Supreme Court Justices Ever | 0 | - | 4.49 | 11,683 |
| The George Washington Presidency | 0 | - | 4.03 | 14,485 |
| Franklin... or Theodore Roosevelt | 0 | - | 4.35 | 16,889 |
| U.S. Presidents to Win the Nobel Peace Prize | 0 | - | 4.34 | 18,242 |
| U.S. Presidential Knowledge - Multiple Choice | 0 | - | 4.36 | 21,623 |
| Confederate States of the U.S. Civil War | 0 | - | 4.91 | 128,786 |
| Category Elimination - U.S. States #1 | 0 | - | 4.88 | 218,945 |
| Category Elimination - U.S. States #2 | 0 | - | 4.82 | 132,833 |
| European Secessionist Movements on a Map | 0 | - | 4.53 | 34,802 |
| Random European Countries on a Map | 0 | - | 4.97 | 282,299 |
| Random Sequential European Countries on a Map | 0 | - | 4.99 | 216,368 |
| Europe Map with Random Merged Countries | 0 | - | 4.97 | 316,185 |
| Countries of Europe After World War II | 0 | - | 4.99 | 186,975 |
| Countries of Europe Before World War I | 0 | - | 4.99 | 155,583 |
| History of Russia Quiz | 0 | - | 4.49 | 31,813 |
| Countries Invaded by the USSR | 0 | - | 4.29 | 93,651 |
| States of the Holy Roman Empire in 1356 | 0 | - | 4.97 | 72,838 |
| Modern Countries Conquered by Alexander the Great | 0 | - | 4.90 | 105,355 |
| History of Italy | 0 | - | 4.55 | 31,860 |
| Count in Roman Numerals - 30 Second Sprint | 0 | - | 4.26 | 101,736 |
| Geography of the Dutch Empire | 0 | - | 4.62 | 34,518 |
| Countries of the Spanish Empire | 0 | - | 4.52 | 77,024 |
| Real Madrid 2010s Starting XI | 0 | - | 4.89 | 66,426 |
| Arthurian Legend | 0 | - | 4.33 | 25,061 |
| Invasions of Great Britain | 0 | - | 4.51 | 59,631 |
| Groups of Things - Harry Potter | 0 | - | 4.82 | 280,388 |
| Tolkien's Middle Earth Map Quiz | 0 | - | 4.91 | 37,237 |
| Vatican City Country Quiz | 0 | - | 4.53 | 44,085 |
| Vietnam War Countries | 0 | - | 4.83 | 93,744 |
| Countries of the Japanese Empire | 0 | - | 4.97 | 103,930 |
| Communist Countries in History | 0 | - | 4.63 | 493,166 |
| History of India | 0 | - | 4.61 | 21,311 |
| Countries that Bordered British India with an Empty Map | 0 | - | 4.69 | 55,232 |
| Countries of Africa | 0 | - | 5.00 | 2,513,638 |
| Africa Map Quiz | 0 | - | 5.00 | 2,106,885 |
| African Countries by First 2 Letters | 0 | - | 4.96 | 266,805 |
| History of South Africa | 0 | - | 4.60 | 17,622 |
| Oceania Map Quiz | 0 | - | 4.98 | 636,694 |
| Australian Capitals | 0 | - | 4.92 | 62,612 |
| Australia Map Quiz | 0 | - | 4.94 | 342,835 |
| History of Mexico | 0 | - | 4.58 | 15,244 |
| United States Map Quiz | 0 | - | 4.98 | 4,144,893 |
| Arms Exports - United States | 0 | - | 4.73 | 59,146 |
| U.S. Federal Agency Acronyms | 0 | - | 4.50 | 79,789 |
| Red State or Blue State Trait? | 0 | - | 4.42 | 55,039 |
| Win the U.S. Presidential Election | 0 | - | 4.80 | 620,257 |
| U.S. Presidential Quotes | 0 | - | 4.37 | 44,380 |
| The George W. Bush Presidency | 0 | - | 4.06 | 32,102 |
| US Presidents Breakdown Puzzle #1 | 0 | - | 3.69 | 19,966 |
| People in Pictures with Ronald Reagan | 0 | - | 4.35 | 40,499 |
| U.S. President Scramble | 0 | - | 4.40 | 116,321 |
| U.S. Presidents True or False | 0 | - | 3.96 | 15,541 |
| U.S. Presidents With Facial Hair By Picture | 0 | - | 4.48 | 23,055 |
| U.S. Presidential Last Names as Baby Names | 0 | - | 4.19 | 33,395 |
| Random U.S. Presidents by Picture | 0 | - | 4.39 | 65,902 |
| People in Pictures with Barack Obama | 0 | - | 4.10 | 47,734 |
| The Kennedy Family | 0 | - | 3.90 | 14,033 |
| U.S. History for Dummies | 0 | - | 4.47 | 82,598 |
| The American Civil War | 0 | - | 4.62 | 52,213 |
| Count to 10 in Europe: Pro | 0 | - | 4.86 | 68,723 |
| Biggest European Cities by Letter | 0 | - | 4.54 | 126,317 |
| Europe Cities Map Quiz | 0 | - | 4.99 | 362,732 |
| Official European Union Languages | 0 | - | 4.97 | 237,236 |
| European Countries in their Native Language | 0 | - | 4.99 | 157,080 |
| Europe Map Quiz | 0 | - | 5.00 | 4,737,855 |
| European Countries by First 2 Letters | 0 | - | 4.95 | 526,864 |
| Europe by Borders in 30 Seconds | 0 | - | 4.98 | 425,811 |
| Save Europeans by Guessing Countries | 0 | - | 4.84 | 210,230 |
| History of Austria | 0 | - | 4.70 | 17,777 |
| Geography of the French Empire | 0 | - | 4.45 | 26,963 |
| The French Revolution | 0 | - | 4.46 | 23,826 |
| History of France | 0 | - | 4.59 | 56,341 |
| French History Multiple Choice | 0 | - | 4.55 | 32,906 |
| Biggest Cities in Germany in 1910 | 0 | - | 4.41 | 23,404 |
| Ancient Greek Trivia | 0 | - | 4.62 | 66,821 |
| Geography of Ancient Greece | 0 | - | 4.69 | 31,803 |
| Greek Mythology General Knowledge #2 | 0 | - | 4.59 | 73,057 |
| Ancient Greece - Multiple Choice | 0 | - | 4.54 | 41,488 |
| Countries Italy Declared War On | 0 | - | 4.75 | 43,052 |
| Ancient Roman Trivia #2 | 0 | - | 4.57 | 38,580 |
| Geography of the Roman Empire | 0 | - | 4.56 | 51,735 |
| Roman Names for Places | 0 | - | 4.62 | 57,954 |
| Byzantine History | 0 | - | 4.91 | 28,661 |
| History of The Netherlands | 0 | - | 4.46 | 17,341 |
| The Vikings! | 0 | - | 4.46 | 28,263 |
| The Portuguese Empire | 0 | - | 4.54 | 12,006 |
| Geography of the Spanish Empire | 0 | - | 4.49 | 37,058 |
| Biggest Urban Areas in the UK | 0 | - | 4.42 | 175,923 |
| Biggest Cities in the Commonwealth of Nations | 0 | - | 4.56 | 65,343 |
| Biggest Cities in the UK | 0 | - | 4.47 | 104,318 |
| Do You Even Know Anything About Shakespeare? | 0 | - | 4.57 | 34,237 |
