| Prime Ministers of the UK | 0 | - | 4.96 | 434,643 |
| Countries Most-Visited By Queen Elizabeth II | 0 | - | 4.40 | 51,485 |
| Roman Numeral Decoding Quiz | 0 | - | 4.94 | 433,545 |
| U.S. Presidents Quiz | 0 | - | 5.00 | 3,654,370 |
| Prime Ministers of Australia | 0 | - | 4.50 | 31,678 |
| Soviet Leaders 1917–1991 | 0 | - | 4.43 | 94,433 |
| Countries "Ruled" by King Charles III | 0 | - | 4.78 | 82,597 |
| Name the Popes Quiz | 0 | - | 4.47 | 137,157 |
| Countries of the Popes | 0 | - | 4.79 | 127,218 |
| Figures from Greek Mythology | 0 | - | 4.91 | 184,947 |
| The Dictator Files: Benito Mussolini | 0 | - | 4.65 | 23,313 |
| Modern Day Countries of Nazi Germany on a Map | 0 | - | 4.97 | 143,179 |
| James Bond Countries Visited Map | 0 | - | 4.99 | 63,485 |
| Commonwealth of Nations Countries | 0 | - | 4.94 | 236,289 |
| Country by Photo of its Leader | 0 | - | 4.74 | 123,260 |
| U.S. Presidents by Picture | 0 | - | 4.87 | 423,741 |
| Canadian Prime Ministers | 0 | - | 4.63 | 57,040 |
| Biggest Trading Partners – United Kingdom | 0 | - | 4.92 | 79,514 |
| U.S. Vice Presidents | 0 | - | 4.41 | 134,937 |
| U.S. Presidential Trivia #1 | 0 | - | 4.45 | 107,949 |
| U.S. Presidents by Event | 0 | - | 4.58 | 33,499 |
| Losing U.S. Presidential Candidates in History | 0 | - | 4.61 | 93,001 |
| Presidential Middle Names | 0 | - | 4.41 | 59,702 |
| First Names of U.S. Presidents | 0 | - | 4.85 | 379,566 |
| U.S. Presidential Trivia #2 | 0 | - | 4.49 | 52,737 |
| Assassinated U.S. Presidents | 0 | - | 4.63 | 93,819 |
| Ten Least Guessed U.S. Presidents | 0 | - | 4.45 | 38,172 |
| Name a Valid U.S. President #1 | 0 | - | 4.89 | 189,854 |
| Play-Doh Presidents | 0 | - | 5.00 | 81,675 |
| U.S. States or European Countries by GDP | 0 | - | 4.98 | 88,045 |
| Countries of the Soviet Union | 0 | - | 4.98 | 193,837 |
| Two Letter Roman Numerals | 0 | - | 4.97 | 55,617 |
| People in Pictures with Queen Elizabeth II | 0 | - | 4.38 | 29,034 |
| Pope Facts | 0 | - | 4.39 | 31,039 |
| Paramount Leaders of China | 0 | - | 4.36 | 10,998 |
| U.S. Citizenship Test Questions | 0 | - | 4.83 | 238,327 |
| U.S. Presidents Who Died in Office | 0 | - | 4.77 | 34,745 |
| Top 10 Oldest African Countries | 0 | - | 4.88 | 27,447 |
| Countries of Europe in 1815 With a Map | 0 | - | 4.99 | 148,948 |
| Countries of Europe in 1848 | 0 | - | 4.98 | 75,423 |
| Countries of Europe in 1870 with a Map | 0 | - | 4.95 | 63,416 |
| Every Country of Europe Since 1815 With a Map | 0 | - | 4.98 | 70,112 |
| Countries of Europe in 1360 with a Map | 0 | - | 4.99 | 56,020 |
| Soviet Union Country Quiz | 0 | - | 4.90 | 80,238 |
| Roman to Greek God | 0 | - | 4.52 | 122,211 |
| Countries in the Byzantine Empire | 0 | - | 4.95 | 71,733 |
| Biggest British Empire Countries | 0 | - | 4.73 | 94,429 |
| Shakespeare's Plays Quiz | 0 | - | 4.38 | 385,723 |
| The Dictator Files: Saddam Hussein | 0 | - | 4.48 | 15,755 |
| The Dictator Files: Chairman Mao | 0 | - | 4.28 | 20,574 |
| Countries of the Mongol Empire on a Map | 0 | - | 4.99 | 105,896 |
| African Countries with the Most Christians | 0 | - | 4.94 | 74,862 |
| U.S. Cabinet Departments | 0 | - | 4.86 | 72,526 |
| U.S. Bill of Rights | 0 | - | 4.53 | 32,376 |
| U.S. Governors Who Ran For President | 0 | - | 4.47 | 20,166 |
| First Ladies of the United States | 0 | - | 4.28 | 85,245 |
| The Franklin D. Roosevelt Presidency | 0 | - | 4.43 | 23,815 |
| The Abraham Lincoln Presidency | 0 | - | 4.52 | 26,111 |
| U.S. Presidents in Order - Whammies | 0 | - | 4.32 | 76,283 |
| U.S. Vice Presidents Who Became President | 0 | - | 4.64 | 16,002 |
| Add a Letter - Make a U.S. President | 0 | - | 4.61 | 23,833 |
| Deadliest U.S. Wars | 0 | - | 4.89 | 189,254 |
| Shortest U.S. Presidential Terms | 0 | - | 4.75 | 12,686 |
| Every European Country Shape | 0 | - | 4.96 | 200,171 |
| The Dictator Files: Joseph Stalin | 0 | - | 4.37 | 48,288 |
| The Dictator Files: Vladimir Lenin | 0 | - | 4.45 | 26,637 |
| States of the German Confederation in 1848 | 0 | - | 4.89 | 31,520 |
| Letters of the Greek Alphabet | 0 | - | 4.97 | 641,910 |
| Name that Greek Letter | 0 | - | 4.94 | 321,665 |
| Modern Day Countries of the Dutch Empire on a Map | 0 | - | 4.87 | 60,373 |
| Countries of Iberia in History with a Map | 0 | - | 4.87 | 41,137 |
| Modern Day Countries of the Spanish Empire on a Map | 0 | - | 4.95 | 85,494 |
| Modern-Day Countries of the British Empire in 1921 | 0 | - | 4.99 | 116,278 |
| Name the English Monarchs | 0 | - | 4.92 | 497,895 |
| Top 100 UK Baby Girls' Names in 1850 | 0 | - | 4.35 | 61,520 |
| Asian Countries with the Most Christians | 0 | - | 4.85 | 96,266 |
| National Founders | 0 | - | 4.40 | 83,649 |
| Biggest Trading Partners – Australia | 0 | - | 4.93 | 60,955 |
| U.S. Presidential Running Mates | 0 | - | 4.40 | 28,461 |
| US Presidents - One Minute Sprint | 0 | - | 4.41 | 303,367 |
| The Thomas Jefferson Presidency | 0 | - | 4.26 | 13,661 |
| Random U.S. Vice President to President | 0 | - | 4.39 | 30,500 |
| The John Adams Presidency | 0 | - | 4.12 | 8,676 |
| The Theodore Roosevelt Presidency | 0 | - | 4.39 | 7,682 |
| Name a Valid U.S. President #2 | 0 | - | 4.54 | 69,417 |
| U.S. Vice Presidential Trivia | 0 | - | 4.26 | 12,773 |
| The American Revolution | 0 | - | 4.52 | 54,057 |
| U.S. States or European Countries by Area | 0 | - | 4.94 | 94,714 |
| Biggest Countries in Europe in 1700 | 0 | - | 4.73 | 58,146 |
| Neutral European Countries of WWII | 0 | - | 4.91 | 160,468 |
| U.S. States or European Countries by Population | 0 | - | 4.97 | 131,940 |
| Biggest Trading Partners - Germany | 0 | - | 4.97 | 70,777 |
| Olympian Gods Quiz | 0 | - | 4.96 | 496,126 |
| The Trojan War | 0 | - | 4.83 | 39,428 |
| Ancient Greek Words | 0 | - | 4.92 | 110,691 |
| Greek Mythology General Knowledge #1 | 0 | - | 4.85 | 110,536 |
| Things with Names from Classical Mythology | 0 | - | 4.28 | 87,163 |
| 101 Figures from Greek Mythology | 0 | - | 5.00 | 124,288 |
| Ancient Roman Trivia #1 | 0 | - | 4.85 | 84,046 |
| Roman Emperors | 0 | - | 4.95 | 118,490 |
| Biggest Trading Partners - Spain | 0 | - | 4.91 | 53,505 |
| Shakespeare Quotes | 0 | - | 4.43 | 71,122 |
| Lord of the Rings Characters | 0 | - | 4.54 | 112,700 |
| 10 Plagues of Egypt | 0 | - | 4.39 | 52,276 |
| Prime Ministers of Israel | 0 | - | 3.97 | 17,820 |
| Biggest Trading Partners - China | 0 | - | 4.95 | 74,680 |
| Colonies of Africa with a Map | 0 | - | 4.77 | 53,945 |
| The Dictator Files: Fidel Castro | 0 | - | 4.19 | 12,258 |
| All U.S. Supreme Court Justices | 0 | - | 4.54 | 28,882 |
| All U.S. Supreme Court Justices Ever | 0 | - | 4.49 | 11,670 |
| The George Washington Presidency | 0 | - | 4.03 | 14,475 |
| Franklin... or Theodore Roosevelt | 0 | - | 4.35 | 16,870 |
| U.S. Presidents to Win the Nobel Peace Prize | 0 | - | 4.34 | 18,214 |
| U.S. Presidential Knowledge - Multiple Choice | 0 | - | 4.36 | 21,609 |
| Confederate States of the U.S. Civil War | 0 | - | 4.91 | 128,689 |
| Category Elimination - U.S. States #1 | 0 | - | 4.87 | 218,548 |
| Category Elimination - U.S. States #2 | 0 | - | 4.82 | 132,506 |
| European Secessionist Movements on a Map | 0 | - | 4.53 | 34,745 |
| Random European Countries on a Map | 0 | - | 4.97 | 281,974 |
| Random Sequential European Countries on a Map | 0 | - | 4.99 | 216,146 |
| Europe Map with Random Merged Countries | 0 | - | 4.97 | 315,728 |
| Countries of Europe After World War II | 0 | - | 4.99 | 186,740 |
| Countries of Europe Before World War I | 0 | - | 4.99 | 155,354 |
| History of Russia Quiz | 0 | - | 4.49 | 31,794 |
| Countries Invaded by the USSR | 0 | - | 4.29 | 93,548 |
| States of the Holy Roman Empire in 1356 | 0 | - | 4.97 | 72,464 |
| Modern Countries Conquered by Alexander the Great | 0 | - | 4.90 | 105,308 |
| History of Italy | 0 | - | 4.55 | 31,814 |
| Count in Roman Numerals - 30 Second Sprint | 0 | - | 4.26 | 101,472 |
| Geography of the Dutch Empire | 0 | - | 4.62 | 34,482 |
| Countries of the Spanish Empire | 0 | - | 4.52 | 76,981 |
| Real Madrid 2010s Starting XI | 0 | - | 4.89 | 66,160 |
| Arthurian Legend | 0 | - | 4.33 | 25,050 |
| Invasions of Great Britain | 0 | - | 4.51 | 59,388 |
| Groups of Things - Harry Potter | 0 | - | 4.82 | 280,112 |
| Tolkien's Middle Earth Map Quiz | 0 | - | 4.91 | 37,118 |
| Vatican City Country Quiz | 0 | - | 4.53 | 44,002 |
| Vietnam War Countries | 0 | - | 4.83 | 93,609 |
| Countries of the Japanese Empire | 0 | - | 4.97 | 103,861 |
| Communist Countries in History | 0 | - | 4.63 | 492,512 |
| History of India | 0 | - | 4.61 | 21,284 |
| Countries that Bordered British India with an Empty Map | 0 | - | 4.68 | 55,177 |
| Countries of Africa | 0 | - | 5.00 | 2,507,844 |
| Africa Map Quiz | 0 | - | 5.00 | 2,104,299 |
| African Countries by First 2 Letters | 0 | - | 4.96 | 266,531 |
| History of South Africa | 0 | - | 4.60 | 17,602 |
| Oceania Map Quiz | 0 | - | 4.98 | 635,306 |
| Australian Capitals | 0 | - | 4.92 | 62,593 |
| Australia Map Quiz | 0 | - | 4.94 | 342,479 |
| History of Mexico | 0 | - | 4.58 | 15,230 |
| United States Map Quiz | 0 | - | 4.98 | 4,141,825 |
| Arms Exports - United States | 0 | - | 4.70 | 54,352 |
| U.S. Federal Agency Acronyms | 0 | - | 4.50 | 79,737 |
| Red State or Blue State Trait? | 0 | - | 4.42 | 54,941 |
| Win the U.S. Presidential Election | 0 | - | 4.80 | 618,493 |
| U.S. Presidential Quotes | 0 | - | 4.37 | 44,363 |
| The George W. Bush Presidency | 0 | - | 4.06 | 32,088 |
| US Presidents Breakdown Puzzle #1 | 0 | - | 3.69 | 19,959 |
| People in Pictures with Ronald Reagan | 0 | - | 4.35 | 40,447 |
| U.S. President Scramble | 0 | - | 4.40 | 116,201 |
| U.S. Presidents True or False | 0 | - | 3.96 | 15,528 |
| U.S. Presidents With Facial Hair By Picture | 0 | - | 4.48 | 23,023 |
| U.S. Presidential Last Names as Baby Names | 0 | - | 4.19 | 33,361 |
| Random U.S. Presidents by Picture | 0 | - | 4.39 | 65,820 |
| People in Pictures with Barack Obama | 0 | - | 4.10 | 47,695 |
| The Kennedy Family | 0 | - | 3.90 | 14,026 |
| U.S. History for Dummies | 0 | - | 4.47 | 82,483 |
| The American Civil War | 0 | - | 4.62 | 52,159 |
| Count to 10 in Europe: Pro | 0 | - | 4.85 | 68,581 |
| Biggest European Cities by Letter | 0 | - | 4.55 | 126,226 |
| Europe Cities Map Quiz | 0 | - | 4.99 | 362,304 |
| Official European Union Languages | 0 | - | 4.97 | 236,525 |
| European Countries in their Native Language | 0 | - | 4.99 | 156,701 |
| Europe Map Quiz | 0 | - | 5.00 | 4,731,313 |
| European Countries by First 2 Letters | 0 | - | 4.95 | 526,352 |
| Europe by Borders in 30 Seconds | 0 | - | 4.98 | 425,201 |
| Save Europeans by Guessing Countries | 0 | - | 4.84 | 209,480 |
| History of Austria | 0 | - | 4.70 | 17,747 |
| Geography of the French Empire | 0 | - | 4.48 | 26,933 |
| The French Revolution | 0 | - | 4.46 | 23,785 |
| History of France | 0 | - | 4.59 | 56,046 |
| French History Multiple Choice | 0 | - | 4.55 | 32,879 |
| Biggest Cities in Germany in 1910 | 0 | - | 4.41 | 23,383 |
| Ancient Greek Trivia | 0 | - | 4.62 | 66,775 |
| Geography of Ancient Greece | 0 | - | 4.69 | 31,771 |
| Greek Mythology General Knowledge #2 | 0 | - | 4.59 | 72,901 |
| Ancient Greece - Multiple Choice | 0 | - | 4.54 | 41,434 |
| Countries Italy Declared War On | 0 | - | 4.75 | 42,952 |
| Ancient Roman Trivia #2 | 0 | - | 4.57 | 38,533 |
| Geography of the Roman Empire | 0 | - | 4.56 | 51,669 |
| Roman Names for Places | 0 | - | 4.62 | 57,878 |
| Byzantine History | 0 | - | 4.91 | 28,620 |
| History of The Netherlands | 0 | - | 4.46 | 17,311 |
| The Vikings! | 0 | - | 4.45 | 28,245 |
| The Portuguese Empire | 0 | - | 4.54 | 11,990 |
| Geography of the Spanish Empire | 0 | - | 4.49 | 37,024 |
| Biggest Urban Areas in the UK | 0 | - | 4.42 | 175,794 |
| Biggest Cities in the Commonwealth of Nations | 0 | - | 4.61 | 65,311 |
| Biggest Cities in the UK | 0 | - | 4.48 | 104,146 |
| Do You Even Know Anything About Shakespeare? | 0 | - | 4.57 | 34,200 |
