| Prime Ministers of the UK | 0 | - | 4.95 | 442,367 |
| Most-Visited Countries by Popes | 0 | - | 4.56 | 84,181 |
| U.S. Presidents Quiz | 0 | - | 5.00 | 3,726,443 |
| Country by Photo of its Leader | 0 | - | 4.70 | 124,642 |
| Prime Ministers of Australia | 0 | - | 4.51 | 32,201 |
| U.S. Presidents by Picture | 0 | - | 4.87 | 428,555 |
| First Names of U.S. Presidents | 0 | - | 4.86 | 383,643 |
| U.S. Presidential Last Names as Baby Names | 0 | - | 4.19 | 33,815 |
| Canadian Prime Ministers | 0 | - | 4.64 | 57,934 |
| Name a Valid U.S. President #1 | 0 | - | 4.89 | 193,823 |
| Play-Doh Presidents | 0 | - | 5.00 | 82,878 |
| U.S. Citizenship Test Questions | 0 | - | 4.83 | 240,834 |
| Countries of Europe in 1815 With a Map | 0 | - | 4.99 | 151,395 |
| Countries of Europe in 1848 | 0 | - | 4.98 | 85,475 |
| Countries of Europe in 1870 with a Map | 0 | - | 4.95 | 65,794 |
| Every Country of Europe Since 1815 With a Map | 0 | - | 4.97 | 71,863 |
| Countries of Europe in 1360 with a Map | 0 | - | 4.99 | 57,595 |
| Soviet Leaders 1917–1991 | 0 | - | 4.44 | 95,576 |
| States of the German Confederation in 1848 | 0 | - | 4.90 | 32,452 |
| Name the Popes Quiz | 0 | - | 4.47 | 138,932 |
| Countries of the Popes | 0 | - | 4.79 | 128,741 |
| The Dictator Files: Saddam Hussein | 0 | - | 4.48 | 15,934 |
| U.S. Cabinet Departments | 0 | - | 4.86 | 73,106 |
| U.S. Presidential Trivia #1 | 0 | - | 4.45 | 109,570 |
| U.S. Presidents by Event | 0 | - | 4.58 | 35,356 |
| Losing U.S. Presidential Candidates in History | 0 | - | 4.62 | 94,636 |
| Presidential Middle Names | 0 | - | 4.41 | 60,733 |
| U.S. Presidential Trivia #2 | 0 | - | 4.49 | 53,697 |
| Assassinated U.S. Presidents | 0 | - | 4.63 | 94,898 |
| Ten Least Guessed U.S. Presidents | 0 | - | 4.45 | 38,636 |
| Deadliest U.S. Wars | 0 | - | 4.89 | 191,798 |
| Every European Country Shape | 0 | - | 4.96 | 203,010 |
| The Dictator Files: Vladimir Lenin | 0 | - | 4.46 | 26,936 |
| Olympian Gods Quiz | 0 | - | 4.96 | 503,804 |
| The Trojan War | 0 | - | 4.83 | 39,993 |
| Letters of the Greek Alphabet | 0 | - | 4.97 | 652,002 |
| Name that Greek Letter | 0 | - | 4.93 | 324,996 |
| Greek Mythology General Knowledge #1 | 0 | - | 4.85 | 112,969 |
| The Dictator Files: Benito Mussolini | 0 | - | 4.65 | 23,570 |
| Ancient Roman Trivia #1 | 0 | - | 4.85 | 85,594 |
| Roman Emperors | 0 | - | 4.95 | 121,220 |
| Modern Day Countries of the Dutch Empire on a Map | 0 | - | 4.87 | 61,679 |
| Countries of Iberia in History with a Map | 0 | - | 4.88 | 42,389 |
| Modern Day Countries of the Spanish Empire on a Map | 0 | - | 4.95 | 86,890 |
| Modern-Day Countries of the British Empire in 1921 | 0 | - | 4.99 | 118,791 |
| James Bond Countries Visited Map | 0 | - | 4.99 | 64,758 |
| Name the English Monarchs | 0 | - | 4.91 | 506,453 |
| Vatican City Country Quiz | 0 | - | 4.53 | 44,668 |
| Every Asian Country Shape | 0 | - | 4.95 | 88,611 |
| Paramount Leaders of China | 0 | - | 4.36 | 11,132 |
| The Dictator Files: Chairman Mao | 0 | - | 4.28 | 20,754 |
| Countries of the Mongol Empire on a Map | 0 | - | 4.99 | 107,550 |
| Every African Country Shape | 0 | - | 4.90 | 88,397 |
| National Founders | 0 | - | 4.40 | 83,977 |
| Random American Countries on a Map | 0 | - | 4.96 | 100,217 |
| South America Flags Map Quiz | 0 | - | 4.95 | 88,967 |
| The Dictator Files: Fidel Castro | 0 | - | 4.19 | 12,396 |
| US Presidents - One Minute Sprint | 0 | - | 4.41 | 306,218 |
| U.S. Presidents Who Died in Office | 0 | - | 4.77 | 35,208 |
| Name a Valid U.S. President #2 | 0 | - | 4.54 | 70,595 |
| U.S. State Flags | 0 | - | 4.89 | 173,011 |
| U.S. States that Start with M - Shape Quiz | 0 | - | 4.94 | 58,460 |
| Biggest Countries in Europe in 1700 | 0 | - | 4.73 | 58,754 |
| Random European Countries on a Map | 0 | - | 4.97 | 285,159 |
| Europe Map with Random Merged Countries | 0 | - | 4.97 | 320,555 |
| U.S. States or European Countries by GDP | 0 | - | 4.98 | 89,749 |
| The Dictator Files: Joseph Stalin | 0 | - | 4.37 | 48,656 |
| States of the Holy Roman Empire in 1356 | 0 | - | 4.97 | 75,383 |
| Ancient Greek Words | 0 | - | 4.93 | 112,477 |
| 101 Figures from Greek Mythology | 0 | - | 4.99 | 127,570 |
| Roman Numeral Decoding Quiz | 0 | - | 4.94 | 439,858 |
| Two Letter Roman Numerals | 0 | - | 4.97 | 56,505 |
| Top 100 Harry Potter Characters by Mention | 0 | - | 4.93 | 397,419 |
| Pope Facts | 0 | - | 4.39 | 31,392 |
| Random Asian Countries on a Map | 0 | - | 4.91 | 171,001 |
| Africa Flags Map Quiz | 0 | - | 4.95 | 36,852 |
| Random African Countries on a Map | 0 | - | 4.99 | 297,891 |
| Eastern Africa Map Quiz | 0 | - | 4.98 | 79,561 |
| U.S. Federal Agency Acronyms | 0 | - | 4.50 | 80,149 |
| All U.S. Supreme Court Justices | 0 | - | 4.54 | 29,148 |
| All U.S. Supreme Court Justices Ever | 0 | - | 4.50 | 11,863 |
| U.S. Vice Presidents | 0 | - | 4.39 | 137,019 |
| U.S. Governors Who Ran For President | 0 | - | 4.47 | 20,364 |
| U.S. Presidential Quotes | 0 | - | 4.37 | 44,611 |
| U.S. Presidential Running Mates | 0 | - | 4.41 | 28,776 |
| First Ladies of the United States | 0 | - | 4.28 | 85,982 |
| The George W. Bush Presidency | 0 | - | 4.06 | 32,284 |
| The Franklin D. Roosevelt Presidency | 0 | - | 4.42 | 24,069 |
| The Abraham Lincoln Presidency | 0 | - | 4.52 | 26,319 |
| U.S. Presidents in Order by First Letter | 0 | - | 4.32 | 77,498 |
| People in Pictures with Ronald Reagan | 0 | - | 4.35 | 40,922 |
| U.S. President Scramble | 0 | - | 4.40 | 117,477 |
| U.S. Vice Presidents Who Became President | 0 | - | 4.64 | 16,364 |
| Add a Letter - Make a U.S. President | 0 | - | 4.58 | 24,102 |
| U.S. Presidents With Facial Hair By Picture | 0 | - | 4.48 | 23,350 |
| Win the 1828 U.S. Presidential Election | 0 | - | 4.31 | 59,058 |
| People in Pictures with Barack Obama | 0 | - | 4.10 | 48,089 |
| U.S. Map with Random Merged States | 0 | - | 4.94 | 303,969 |
| Shapes of Mediterranean Sea Countries | 0 | - | 4.80 | 56,089 |
| Shortest U.S. Presidential Terms | 0 | - | 4.75 | 12,946 |
| Europe Map Quiz | 0 | - | 5.00 | 4,788,661 |
| European Countries by First 2 Letters | 0 | - | 4.95 | 532,546 |
| European Secessionist Movements on a Map | 0 | - | 4.53 | 35,188 |
| Random Sequential European Countries on a Map | 0 | - | 4.99 | 218,058 |
| History of Russia Quiz | 0 | - | 4.47 | 32,006 |
| Countries Invaded by the USSR | 0 | - | 4.29 | 94,432 |
| History of France | 0 | - | 4.61 | 57,627 |
| Ancient Greek Trivia | 0 | - | 4.62 | 67,243 |
| Geography of Ancient Greece | 0 | - | 4.69 | 32,048 |
| Most-Mentioned Characters in the Iliad | 0 | - | 4.81 | 20,969 |
| Figures from Greek Mythology | 0 | - | 4.91 | 188,874 |
| Word Chain - Greek and Roman Mythology | 0 | - | 4.50 | 57,003 |
| History of Italy | 0 | - | 4.55 | 32,148 |
| Countries Italy Declared War On | 0 | - | 4.75 | 43,658 |
| Byzantine History | 0 | - | 4.91 | 29,024 |
| Byzantine Emperors | 0 | - | 4.93 | 14,601 |
| Geography of the Dutch Empire | 0 | - | 4.62 | 34,825 |
| Countries of the Spanish Empire | 0 | - | 4.52 | 77,426 |
| Invasions of Great Britain | 0 | - | 4.51 | 60,099 |
| Wives of King Henry VIII | 0 | - | 4.55 | 53,464 |
| Countries the UK Declared War On | 0 | - | 4.55 | 123,260 |
| Geography of the British Empire | 0 | - | 4.48 | 39,848 |
| Medieval English History | 0 | - | 4.53 | 43,656 |
| Random Sequential Asian Countries on a Map | 0 | - | 4.99 | 119,599 |
| Prime Ministers of Israel | 0 | - | 3.97 | 18,070 |
| Countries that Bordered British India with an Empty Map | 0 | - | 4.69 | 55,663 |
| Colonies of Africa with a Map | 0 | - | 4.79 | 54,766 |
| Random Sequential African Countries on a Map | 0 | - | 5.00 | 128,373 |
| Communist Countries in History | 0 | - | 4.63 | 498,260 |
| Political Movements by Country | 0 | - | 4.46 | 72,777 |
| History of South Africa | 0 | - | 4.60 | 17,765 |
| Oceania Map Quiz | 0 | - | 4.98 | 659,478 |
| Oceanian Capitals - Map Quiz | 0 | - | 4.96 | 51,473 |
| Australian States and Territories | 0 | - | 4.96 | 142,880 |
| Australian Capitals | 0 | - | 4.92 | 62,834 |
| Australian Immigration by Country | 0 | - | 4.81 | 77,505 |
| Australia Map Quiz | 0 | - | 4.95 | 346,189 |
| Australia True or False | 0 | - | 4.87 | 57,154 |
| Flags of North and South America | 0 | - | 4.99 | 377,111 |
| 10 Biggest American Countries by Area | 0 | - | 4.95 | 112,972 |
| Top 10 Most Populous American Countries | 0 | - | 4.96 | 144,812 |
| Latin American Countries Map Quiz | 0 | - | 4.98 | 130,681 |
| History of Mexico | 0 | - | 4.52 | 15,366 |
| South America Map Quiz | 0 | - | 5.00 | 1,556,822 |
| Uruguay Country Quiz | 0 | - | 4.84 | 31,762 |
| Central America and Caribbean Map Quiz | 0 | - | 4.90 | 905,057 |
| Countries of North America Quiz | 0 | - | 5.00 | 1,031,686 |
| North America Map Quiz | 0 | - | 4.98 | 252,128 |
| Third Most Common Language by U.S. State | 0 | - | 4.87 | 113,982 |
| United States Map Quiz | 0 | - | 4.98 | 4,171,565 |
| Names of Generations | 0 | - | 4.09 | 45,526 |
| Topological Map of the USA Quiz | 0 | - | 4.49 | 29,289 |
| U.S. States by Governor | 0 | - | 4.43 | 18,114 |
| U.S. Bill of Rights | 0 | - | 4.53 | 32,598 |
| U.S. Political Parties in History | 0 | - | 4.44 | 27,767 |
| The U.S. Government - How Does it Work? | 0 | - | 4.34 | 42,479 |
| U.S. Government Agencies | 0 | - | 4.44 | 19,779 |
| Red State or Blue State Trait? | 0 | - | 4.42 | 55,701 |
| The Bill Clinton Presidency | 0 | - | 4.24 | 31,543 |
| The George H. W. Bush Presidency | 0 | - | 4.36 | 21,556 |
| The Ronald Reagan Presidency | 0 | - | 4.26 | 24,893 |
| The George Washington Presidency | 0 | - | 4.03 | 14,612 |
| The Thomas Jefferson Presidency | 0 | - | 4.26 | 13,781 |
| Random U.S. Vice President to President | 0 | - | 4.39 | 30,757 |
| The John Adams Presidency | 0 | - | 4.12 | 8,791 |
| Franklin... or Theodore Roosevelt | 0 | - | 4.35 | 16,993 |
| The Theodore Roosevelt Presidency | 0 | - | 4.39 | 7,776 |
| U.S. Presidents to Win the Nobel Peace Prize | 0 | - | 4.34 | 18,381 |
| U.S. Presidential Knowledge - Multiple Choice | 0 | - | 4.36 | 21,762 |
| U.S. Vice Presidential Trivia | 0 | - | 4.26 | 12,932 |
| Random U.S. Presidents by Picture | 0 | - | 4.40 | 66,614 |
| The Barack Obama Presidency | 0 | - | 4.14 | 25,509 |
| American Founding Fathers | 0 | - | 4.42 | 23,274 |
| The American Revolution | 0 | - | 4.52 | 54,363 |
| American History Quotes #1 | 0 | - | 4.37 | 96,203 |
| People on Money - United States | 0 | - | 4.31 | 63,434 |
| American History Quotes #2 | 0 | - | 4.38 | 41,510 |
| U.S. History Groups of Two | 0 | - | 4.23 | 44,587 |
| 100 Most Influential Figures in U.S. History | 0 | - | 4.20 | 45,226 |
| Events in U.S. History | 0 | - | 4.41 | 28,830 |
| Embarrassing Chapters in US History | 0 | - | 4.17 | 33,197 |
| U.S. History Multiple Choice #3 | 0 | - | 4.43 | 24,785 |
| U.S. History for Dummies | 0 | - | 4.47 | 83,421 |
| Last Names in U.S. History #1 | 0 | - | 4.25 | 36,342 |
| The American Civil War | 0 | - | 4.62 | 52,626 |
| US States Quiz | 0 | - | 5.00 | 16,998,574 |
| U.S. State Quarters Picture Quiz #1 | 0 | - | 4.45 | 52,897 |
| U.S. State Quarters Picture Quiz #2 | 0 | - | 4.75 | 38,544 |
| U.S. License Plates Picture Quiz | 0 | - | 4.61 | 53,147 |
| Satellite Images - U.S. States | 0 | - | 4.54 | 45,374 |
| U.S. States by Emoji | 0 | - | 4.48 | 101,386 |
| U.S. State Shapes Quiz #1 | 0 | - | 4.74 | 153,372 |
| U.S. State Shapes Quiz #2 | 0 | - | 4.80 | 102,304 |
| U.S. States that Start with N - Shape Quiz | 0 | - | 4.67 | 48,828 |
| Canada Provinces and Territories | 0 | - | 5.00 | 346,311 |
| Canada Provinces Map Quiz | 0 | - | 4.99 | 644,690 |
| Most Spoken Languages in Canada | 0 | - | 4.91 | 55,574 |
| Mediterranean Countries Quiz | 0 | - | 4.99 | 213,979 |
| Countries with Territorial Claims in Antarctica | 0 | - | 4.94 | 92,926 |
| Straight Shot to Antarctica | 0 | - | 4.94 | 43,180 |
