| Prime Ministers of the UK | 0 | - | 4.96 | 434,397 |
| U.S. Presidents Quiz | 0 | - | 5.00 | 3,651,399 |
| Soviet Leaders 1917–1991 | 0 | - | 4.43 | 94,389 |
| James Bond Countries Visited Map | 0 | - | 4.99 | 63,369 |
| Commonwealth of Nations Countries | 0 | - | 4.94 | 236,137 |
| Prime Ministers of Australia | 0 | - | 4.50 | 31,659 |
| U.S. Presidents by Picture | 0 | - | 4.87 | 423,465 |
| Canadian Prime Ministers | 0 | - | 4.63 | 56,999 |
| First Names of U.S. Presidents | 0 | - | 4.85 | 379,445 |
| Name a Valid U.S. President #1 | 0 | - | 4.89 | 189,708 |
| Play-Doh Presidents | 0 | - | 5.00 | 81,639 |
| U.S. Citizenship Test Questions | 0 | - | 4.83 | 238,257 |
| U.S. Presidential Last Names as Baby Names | 0 | - | 4.19 | 33,348 |
| Countries of Europe in 1815 With a Map | 0 | - | 4.99 | 148,855 |
| Countries of Europe in 1848 | 0 | - | 4.98 | 75,350 |
| Countries of Europe in 1870 with a Map | 0 | - | 4.95 | 63,312 |
| Every Country of Europe Since 1815 With a Map | 0 | - | 4.98 | 70,048 |
| Countries of Europe in 1360 with a Map | 0 | - | 4.99 | 55,958 |
| Biggest British Empire Countries | 0 | - | 4.73 | 87,262 |
| Shakespeare's Plays Quiz | 0 | - | 4.38 | 385,579 |
| Name the Popes Quiz | 0 | - | 4.47 | 137,050 |
| Countries of the Popes | 0 | - | 4.79 | 127,140 |
| Country by Photo of its Leader | 0 | - | 4.74 | 123,198 |
| Countries of the Mongol Empire on a Map | 0 | - | 4.99 | 105,784 |
| U.S. Cabinet Departments | 0 | - | 4.86 | 72,503 |
| Deadliest U.S. Wars | 0 | - | 4.89 | 189,187 |
| Every European Country Shape | 0 | - | 4.96 | 200,016 |
| The Dictator Files: Vladimir Lenin | 0 | - | 4.45 | 26,623 |
| States of the German Confederation in 1848 | 0 | - | 4.89 | 31,501 |
| Letters of the Greek Alphabet | 0 | - | 4.97 | 641,520 |
| Name that Greek Letter | 0 | - | 4.94 | 321,513 |
| Modern Day Countries of the Dutch Empire on a Map | 0 | - | 4.87 | 60,325 |
| Countries of Iberia in History with a Map | 0 | - | 4.87 | 41,106 |
| Modern Day Countries of the Spanish Empire on a Map | 0 | - | 4.95 | 85,446 |
| Modern-Day Countries of the British Empire in 1921 | 0 | - | 4.99 | 116,177 |
| Name the English Monarchs | 0 | - | 4.92 | 497,650 |
| Paramount Leaders of China | 0 | - | 4.36 | 10,996 |
| National Founders | 0 | - | 4.40 | 83,636 |
| U.S. Vice Presidents | 0 | - | 4.41 | 134,842 |
| U.S. Presidential Trivia #1 | 0 | - | 4.45 | 107,895 |
| U.S. Presidents by Event | 0 | - | 4.58 | 33,413 |
| Losing U.S. Presidential Candidates in History | 0 | - | 4.61 | 92,957 |
| Presidential Middle Names | 0 | - | 4.41 | 59,662 |
| U.S. Presidential Trivia #2 | 0 | - | 4.49 | 52,698 |
| US Presidents - One Minute Sprint | 0 | - | 4.41 | 303,288 |
| Assassinated U.S. Presidents | 0 | - | 4.61 | 93,775 |
| U.S. Presidents Who Died in Office | 0 | - | 4.77 | 34,721 |
| Ten Least Guessed U.S. Presidents | 0 | - | 4.45 | 38,151 |
| Name a Valid U.S. President #2 | 0 | - | 4.54 | 69,362 |
| U.S. States or European Countries by Area | 0 | - | 4.94 | 94,629 |
| Biggest Countries in Europe in 1700 | 0 | - | 4.73 | 58,119 |
| U.S. States or European Countries by Population | 0 | - | 4.97 | 131,852 |
| Olympian Gods Quiz | 0 | - | 4.96 | 495,509 |
| The Trojan War | 0 | - | 4.83 | 39,413 |
| Ancient Greek Words | 0 | - | 4.92 | 110,621 |
| Greek Mythology General Knowledge #1 | 0 | - | 4.85 | 110,463 |
| 101 Figures from Greek Mythology | 0 | - | 4.99 | 124,161 |
| The Dictator Files: Benito Mussolini | 0 | - | 4.65 | 23,301 |
| Ancient Roman Trivia #1 | 0 | - | 4.85 | 84,015 |
| Roman Emperors | 0 | - | 4.95 | 118,372 |
| Roman Numeral Decoding Quiz | 0 | - | 4.94 | 433,315 |
| Biggest Trading Partners – United Kingdom | 0 | - | 4.92 | 79,463 |
| Countries "Ruled" by King Charles III | 0 | - | 4.77 | 82,590 |
| The Dictator Files: Chairman Mao | 0 | - | 4.28 | 20,568 |
| Colonies of Africa with a Map | 0 | - | 4.77 | 53,912 |
| All U.S. Supreme Court Justices | 0 | - | 4.54 | 28,874 |
| All U.S. Supreme Court Justices Ever | 0 | - | 4.49 | 11,668 |
| U.S. Governors Who Ran For President | 0 | - | 4.47 | 20,161 |
| First Ladies of the United States | 0 | - | 4.28 | 85,221 |
| The Franklin D. Roosevelt Presidency | 0 | - | 4.43 | 23,809 |
| The Abraham Lincoln Presidency | 0 | - | 4.52 | 26,104 |
| U.S. Presidents in Order - Whammies | 0 | - | 4.32 | 76,222 |
| U.S. Vice Presidents Who Became President | 0 | - | 4.64 | 15,993 |
| Add a Letter - Make a U.S. President | 0 | - | 4.61 | 23,823 |
| Shortest U.S. Presidential Terms | 0 | - | 4.75 | 12,677 |
| European Secessionist Movements on a Map | 0 | - | 4.53 | 34,731 |
| Random European Countries on a Map | 0 | - | 4.97 | 281,841 |
| Random Sequential European Countries on a Map | 0 | - | 4.99 | 216,089 |
| Europe Map with Random Merged Countries | 0 | - | 4.97 | 315,568 |
| U.S. States or European Countries by GDP | 0 | - | 4.98 | 87,982 |
| History of Russia Quiz | 0 | - | 4.49 | 31,783 |
| Countries of the Soviet Union | 0 | - | 4.98 | 193,765 |
| Countries Invaded by the USSR | 0 | - | 4.29 | 93,512 |
| Soviet Union Country Quiz | 0 | - | 4.90 | 80,203 |
| The Dictator Files: Joseph Stalin | 0 | - | 4.37 | 48,272 |
| States of the Holy Roman Empire in 1356 | 0 | - | 4.97 | 72,392 |
| Figures from Greek Mythology | 0 | - | 4.91 | 184,805 |
| Word Chain - Greek and Roman Mythology | 0 | - | 4.53 | 56,137 |
| History of Italy | 0 | - | 4.55 | 31,806 |
| Two Letter Roman Numerals | 0 | - | 4.97 | 55,589 |
| Geography of the Dutch Empire | 0 | - | 4.62 | 34,471 |
| Countries of the Spanish Empire | 0 | - | 4.52 | 76,972 |
| Invasions of Great Britain | 0 | - | 4.51 | 59,372 |
| Top 100 Harry Potter Characters by Mention | 0 | - | 4.93 | 389,539 |
| Top 100 UK Baby Girls' Names in 1850 | 0 | - | 4.35 | 61,490 |
| Most-Visited Countries by Popes | 0 | - | 4.55 | 83,138 |
| Pope Facts | 0 | - | 4.39 | 31,026 |
| Communist Countries in History | 0 | - | 4.63 | 492,289 |
| History of India | 0 | - | 4.61 | 21,271 |
| Countries that Bordered British India with an Empty Map | 0 | - | 4.68 | 55,148 |
| Countries of Africa | 0 | - | 5.00 | 2,506,092 |
| Africa Map Quiz | 0 | - | 5.00 | 2,103,502 |
| African Countries by First 2 Letters | 0 | - | 4.96 | 266,423 |
| History of South Africa | 0 | - | 4.60 | 17,598 |
| Oceania Map Quiz | 0 | - | 4.98 | 634,889 |
| Australian Capitals | 0 | - | 4.92 | 62,589 |
| Australia Map Quiz | 0 | - | 4.94 | 342,357 |
| History of Mexico | 0 | - | 4.58 | 15,226 |
| United States Map Quiz | 0 | - | 4.98 | 4,140,688 |
| U.S. Federal Agency Acronyms | 0 | - | 4.50 | 79,721 |
| U.S. Bill of Rights | 0 | - | 4.53 | 32,369 |
| Red State or Blue State Trait? | 0 | - | 4.42 | 54,918 |
| U.S. Presidential Quotes | 0 | - | 4.37 | 44,355 |
| U.S. Presidential Running Mates | 0 | - | 4.40 | 28,456 |
| The George W. Bush Presidency | 0 | - | 4.06 | 32,082 |
| The George Washington Presidency | 0 | - | 4.03 | 14,471 |
| The Thomas Jefferson Presidency | 0 | - | 4.26 | 13,654 |
| People in Pictures with Ronald Reagan | 0 | - | 4.35 | 40,434 |
| Random U.S. Vice President to President | 0 | - | 4.39 | 30,487 |
| U.S. President Scramble | 0 | - | 4.40 | 116,165 |
| The John Adams Presidency | 0 | - | 4.12 | 8,674 |
| Franklin... or Theodore Roosevelt | 0 | - | 4.35 | 16,865 |
| The Theodore Roosevelt Presidency | 0 | - | 4.39 | 7,679 |
| U.S. Presidents to Win the Nobel Peace Prize | 0 | - | 4.34 | 18,204 |
| U.S. Presidential Knowledge - Multiple Choice | 0 | - | 4.36 | 21,605 |
| U.S. Vice Presidential Trivia | 0 | - | 4.26 | 12,767 |
| U.S. Presidents With Facial Hair By Picture | 0 | - | 4.48 | 23,013 |
| Random U.S. Presidents by Picture | 0 | - | 4.39 | 65,779 |
| People in Pictures with Barack Obama | 0 | - | 4.10 | 47,685 |
| U.S. History for Dummies | 0 | - | 4.47 | 82,441 |
| The American Civil War | 0 | - | 4.62 | 52,113 |
| Count to 10 in Europe: Pro | 0 | - | 4.85 | 68,552 |
| Europe Cities Map Quiz | 0 | - | 4.99 | 362,194 |
| Official European Union Languages | 0 | - | 4.97 | 236,437 |
| European Countries in their Native Language | 0 | - | 4.99 | 156,644 |
| Europe Map Quiz | 0 | - | 5.00 | 4,729,321 |
| European Countries by First 2 Letters | 0 | - | 4.95 | 526,180 |
| Europe by Borders in 30 Seconds | 0 | - | 4.98 | 425,004 |
| Save Europeans by Guessing Countries | 0 | - | 4.84 | 209,239 |
| History of Austria | 0 | - | 4.70 | 17,742 |
| Geography of the French Empire | 0 | - | 4.48 | 26,920 |
| The French Revolution | 0 | - | 4.46 | 23,768 |
| History of France | 0 | - | 4.59 | 55,955 |
| French History Multiple Choice | 0 | - | 4.55 | 32,863 |
| Biggest Cities in Germany in 1910 | 0 | - | 4.41 | 23,379 |
| Ancient Greek Trivia | 0 | - | 4.62 | 66,754 |
| Geography of Ancient Greece | 0 | - | 4.69 | 31,763 |
| Greek Mythology General Knowledge #2 | 0 | - | 4.59 | 72,849 |
| Ancient Greece - Multiple Choice | 0 | - | 4.54 | 41,416 |
| Countries Italy Declared War On | 0 | - | 4.75 | 42,925 |
| Ancient Roman Trivia #2 | 0 | - | 4.57 | 38,523 |
| Geography of the Roman Empire | 0 | - | 4.56 | 51,653 |
| Roman Names for Places | 0 | - | 4.62 | 57,850 |
| Byzantine History | 0 | - | 4.91 | 28,598 |
| Largest Cities once part of the Byzantine Empire | 0 | - | 4.83 | 21,373 |
| 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 | 37,009 |
| Biggest Urban Areas in the UK | 0 | - | 4.42 | 175,753 |
| Biggest Cities in the Commonwealth of Nations | 0 | - | 4.61 | 65,303 |
| Biggest Cities in the UK | 0 | - | 4.48 | 104,101 |
| Wives of King Henry VIII | 0 | - | 4.55 | 53,162 |
| Countries the UK Declared War On | 0 | - | 4.61 | 121,734 |
| Geography of the British Empire | 0 | - | 4.48 | 39,466 |
| British History A-Z #1 | 0 | - | 4.45 | 45,782 |
| Houses of British Monarchs | 0 | - | 4.53 | 65,283 |
| English First Names of the Middle Ages | 0 | - | 4.47 | 60,297 |
| Medieval English History | 0 | - | 4.53 | 43,304 |
| British History Multiple Choice #1 | 0 | - | 4.46 | 54,948 |
| British History Multiple Choice #2 | 0 | - | 4.42 | 37,822 |
| British History Quiz for Dummies | 0 | - | 4.70 | 78,066 |
| Countries Most-Visited By Queen Elizabeth II | 0 | - | 4.40 | 51,462 |
| East Asia Map Quiz | 0 | - | 4.99 | 1,439,191 |
| Asia Map Quiz | 0 | - | 4.99 | 906,484 |
| Asian Countries by First 2 Letters | 0 | - | 4.91 | 277,032 |
| Middle East Map Quiz | 0 | - | 4.99 | 1,375,499 |
| History of Iran | 0 | - | 4.65 | 16,262 |
| Ottoman Empire Quiz | 0 | - | 4.46 | 17,015 |
| Prime Ministers of Israel | 0 | - | 3.97 | 17,812 |
| Chinese Inventions | 0 | - | 4.30 | 33,715 |
| History of China | 0 | - | 4.37 | 56,668 |
| Countries of the World in 1938 Quiz | 0 | - | 4.95 | 92,760 |
| Historic Journeys on a World Map | 0 | - | 4.99 | 46,119 |
| Countries by Founding Story | 0 | - | 4.95 | 76,483 |
| Independence from Whom | 0 | - | 4.99 | 209,578 |
| Political Movements by Country | 0 | - | 4.46 | 72,242 |
| Who Controlled These Colonies? | 0 | - | 4.88 | 130,661 |
| Most Recently-Settled Countries | 0 | - | 4.94 | 61,966 |
| Countries Kim Jong Un Has Been To | 0 | - | 4.95 | 32,165 |
| States of India | 0 | - | 4.94 | 189,863 |
| The Life of Gandhi | 0 | - | 4.37 | 13,016 |
| Countries with the Most Ascents of Mount Everest | 0 | - | 4.95 | 57,744 |
| Nepal Country Quiz | 0 | - | 4.95 | 37,304 |
| Africa Cities Map Quiz | 0 | - | 4.97 | 98,411 |
| Flags of Africa Quiz | 0 | - | 5.00 | 462,788 |
| African Great Lakes | 0 | - | 4.82 | 65,083 |
| Africa Geography Quiz #1 | 0 | - | 4.93 | 48,988 |
| Landlocked Countries in Africa | 0 | - | 4.99 | 45,766 |
| Top 10 Biggest African Countries by Area | 0 | - | 4.99 | 215,549 |
