| WWII Geography | 0 | - | 4.81 | 120,050 |
| Axis Occupied Countries of WWII | 0 | - | 4.99 | 228,575 |
| WWII Figures by Picture | 0 | - | 4.89 | 64,911 |
| Countries in World War I | 0 | - | 4.88 | 227,713 |
| Countries in World War II | 0 | - | 4.54 | 910,036 |
| Modern-Day Axis-Occupied Countries of WWII on a Map | 0 | - | 4.99 | 85,571 |
| Important Cities in WWII | 0 | - | 4.42 | 93,301 |
| WWII Decoder | 0 | - | 4.41 | 53,436 |
| Name a Valid Answer - World War II | 0 | - | 4.53 | 55,232 |
| World Leaders of the World Wars | 0 | - | 4.35 | 37,780 |
| Cities Bombed During WWII | 0 | - | 4.08 | 30,075 |
| Countries by Percent WWII Deaths | 0 | - | 4.07 | 29,938 |
| Battle to Country | 0 | - | 4.91 | 53,068 |
| The Dictator Files: Adolf Hitler | 0 | - | 4.79 | 77,723 |
| WWII for Dummies | 0 | - | 4.80 | 104,616 |
| Deadliest U.S. Wars | 0 | - | 4.89 | 190,377 |
| Name the English Monarchs | 0 | - | 4.91 | 501,004 |
| Countries with the Most Military Troops | 0 | - | 4.95 | 287,073 |
| Countries with Nuclear Weapons | 0 | - | 4.86 | 271,343 |
| Countries with NO Military | 0 | - | 4.97 | 61,840 |
| WWII A-Z #1 | 0 | - | 4.78 | 102,796 |
| WWII A-Z #2 | 0 | - | 4.44 | 54,557 |
| The American Civil War | 0 | - | 4.62 | 52,346 |
| Marvel Cinematic Universe - All Movies | 0 | - | 4.89 | 336,803 |
| Communist Countries in History | 0 | - | 4.63 | 494,579 |
| Countries with the Most Tanks | 0 | - | 4.91 | 107,007 |
| Military History Vocabulary | 0 | - | 4.91 | 66,971 |
| Star Wars Quotes | 0 | - | 4.85 | 182,848 |
| Name a Disney/Pixar Movie A-Z | 0 | - | 4.84 | 51,502 |
| Countries that Have Won the Most Battles | 0 | - | 4.02 | 39,499 |
| All Disney Animated Movies | 0 | - | 4.78 | 447,930 |
| The Trojan War | 0 | - | 4.83 | 39,623 |
| Greek Mythology General Knowledge #1 | 0 | - | 4.85 | 111,420 |
| Ancient Roman Trivia #1 | 0 | - | 4.85 | 84,369 |
| Roman Emperors | 0 | - | 4.95 | 119,557 |
| The Reign of Queen Elizabeth I | 0 | - | 4.53 | 31,723 |
| Houses of British Monarchs | 0 | - | 4.53 | 65,541 |
| Guess These Badly Described Films | 0 | - | 4.85 | 163,600 |
| Name the 7 Dwarfs | 0 | - | 4.55 | 363,043 |
| Disney Animated Movie Trivia | 0 | - | 4.55 | 74,868 |
| The Reign of Napoleon | 0 | - | 4.54 | 38,877 |
| All Modern-Day Countries Ever Controlled by French People | 0 | - | 4.99 | 57,865 |
| English Royal Consorts | 0 | - | 4.37 | 37,300 |
| Kings of France Quiz | 0 | - | 4.20 | 32,666 |
| Movies by Year, 1990–2009 | 0 | - | 4.21 | 66,644 |
| Pixar Movies Quiz | 0 | - | 4.87 | 431,972 |
| Mulan - "I'll Make A Man Out Of You" Lyrics | 0 | - | 4.61 | 39,172 |
| Countries with U.S. Troops | 0 | - | 4.38 | 131,946 |
| Countries With the Largest Air Forces | 0 | - | 4.47 | 51,393 |
| Major non-NATO U.S. Allies | 0 | - | 4.52 | 52,034 |
| Monster Movies | 0 | - | 4.53 | 31,281 |
| Sci-Fi Movie Quotes | 0 | - | 4.32 | 36,963 |
| Disney's "The Little Mermaid" | 0 | - | 4.41 | 13,772 |
| Disney Heroines | 0 | - | 4.15 | 52,500 |
| Batfacts: The Batman Quiz | 0 | - | 4.49 | 60,691 |
| "A Whole New World" Lyrics | 0 | - | 4.31 | 67,497 |
| Countries of the World in 1938 Quiz | 0 | - | 4.95 | 93,838 |
| History of The Netherlands | 0 | - | 4.46 | 17,394 |
| Historic Journeys on a World Map | 0 | - | 4.99 | 46,535 |
| Countries by Founding Story | 0 | - | 4.95 | 76,989 |
| Countries Invaded by the USSR | 0 | - | 4.29 | 93,877 |
| Independence from Whom | 0 | - | 4.99 | 211,136 |
| Who Controlled These Colonies? | 0 | - | 4.88 | 131,567 |
| Most Recently-Settled Countries | 0 | - | 4.94 | 62,315 |
| Ancient Greek Trivia | 0 | - | 4.62 | 66,909 |
| Geography of Ancient Greece | 0 | - | 4.69 | 31,865 |
| U.S. Five-Star Generals and Admirals | 0 | - | 4.33 | 8,324 |
| Countries Italy Declared War On | 0 | - | 4.75 | 43,221 |
| The Reign of Henry VIII | 0 | - | 4.25 | 27,703 |
| Medieval English History | 0 | - | 4.53 | 43,438 |
| British Royal Titles | 0 | - | 4.18 | 19,926 |
| Elizabeth I... or Elizabeth II? | 0 | - | 4.30 | 24,478 |
| Movies by Year, 1970–1989 | 0 | - | 4.38 | 25,399 |
| Movie Posters by Description | 0 | - | 4.61 | 64,410 |
| Movie Newspaper Headlines | 0 | - | 4.42 | 35,832 |
| Science Fiction Movie Co-Stars | 0 | - | 4.12 | 9,798 |
| Movie Quotes A-Z #1 | 0 | - | 4.31 | 40,905 |
| Star Wars Characters Screen Time by Movie | 0 | - | 4.56 | 28,838 |
| Disney's "The Lion King" | 0 | - | 4.17 | 79,846 |
| Disney's Frozen - Let It Go Lyrics | 0 | - | 4.45 | 72,747 |
| Disney Animals | 0 | - | 4.27 | 239,419 |
| Category Elimination - Disney Animated Movies | 0 | - | 4.08 | 49,555 |
| Disney Feature Films by Characters | 0 | - | 4.42 | 277,067 |
| Batman Actors Quiz | 0 | - | 4.27 | 47,962 |
| Superhero Alter Egos | 0 | - | 4.29 | 164,505 |
| Who Did These Sidekicks Work With? | 0 | - | 4.25 | 110,022 |
| Superhero Decoder | 0 | - | 4.36 | 54,547 |
| Marvel Superheroes | 0 | - | 4.37 | 296,339 |
| Marvel Comics Movie Franchises | 0 | - | 4.29 | 115,803 |
| Avengers Team Members | 0 | - | 4.07 | 77,448 |
| Marvel Cinematic Universe - Actor to Character | 0 | - | 4.11 | 113,053 |
| X-Men Mutants | 0 | - | 4.06 | 47,113 |
| The Spiderman Quiz | 0 | - | 4.31 | 72,604 |
| Top 10 Oldest African Countries | 0 | - | 4.88 | 27,841 |
| Former Flags | 0 | - | 4.97 | 107,377 |
| Countries of the World in 1900 | 0 | - | 4.89 | 84,410 |
| Countries of the World in 1914 with a Map | 0 | - | 4.99 | 194,527 |
| Countries of the World in 1945 with a Map | 0 | - | 5.00 | 150,183 |
| Ancient Greece A-Z | 0 | - | 4.60 | 23,107 |
| States of the German Confederation in 1848 | 0 | - | 4.89 | 31,849 |
| Historic Orient Express Routes Map | 0 | - | 4.99 | 53,344 |
| Greek Mythology General Knowledge #2 | 0 | - | 4.59 | 73,394 |
| Recently Independent Countries | 0 | - | 4.98 | 158,900 |
| Former Capitals | 0 | - | 4.88 | 71,344 |
| WWII First Names | 0 | - | 4.44 | 41,724 |
| Warsaw Pact Countries | 0 | - | 4.83 | 84,429 |
| Historical City to Country | 0 | - | 4.83 | 78,392 |
| Countries by Former Name | 0 | - | 4.99 | 124,835 |
| Cities by Former Name | 0 | - | 4.83 | 91,363 |
| People on Money - United States | 0 | - | 4.31 | 63,310 |
| 100 Most Influential Figures in U.S. History | 0 | - | 4.20 | 44,960 |
| Ancient Roman Trivia #2 | 0 | - | 4.57 | 38,670 |
| Geography of the Roman Empire | 0 | - | 4.56 | 51,833 |
| Roman Names for Places | 0 | - | 4.62 | 58,136 |
| Ancient Greece - Multiple Choice | 0 | - | 4.54 | 41,585 |
| Embarrassing Chapters in British History | 0 | - | 4.29 | 32,211 |
| British History Multiple Choice #1 | 0 | - | 4.46 | 55,080 |
| British History Multiple Choice #2 | 0 | - | 4.42 | 37,917 |
| French History Multiple Choice | 0 | - | 4.55 | 32,987 |
| Countries of Europe in 1444 | 0 | - | 4.92 | 99,366 |
| Countries of the World in 1444 | 0 | - | 4.98 | 60,031 |
| Modern-Day Countries of the Inca Empire on a Map | 0 | - | 4.83 | 57,236 |
| Modern Day Countries of the Kushan Empire on a Map | 0 | - | 4.89 | 24,767 |
| All Modern-Day Countries Ever Controlled by Turkic People | 0 | - | 4.94 | 40,922 |
| All Modern-Day Countries Ever Controlled by Arab People with a Map | 0 | - | 4.98 | 55,190 |
| All Modern-Day Countries Ever Controlled by the Seljuks | 0 | - | 4.92 | 28,439 |
| Countries of Europe before World War II with a Map | 0 | - | 4.95 | 53,000 |
| Countries of the World in 1882 with a Map | 0 | - | 4.89 | 44,156 |
| British History A-Z #1 | 0 | - | 4.45 | 46,363 |
| History of Scotland | 0 | - | 4.51 | 21,064 |
| French History A-Z | 0 | - | 4.23 | 24,503 |
| Countries Settled by Vikings | 0 | - | 4.93 | 121,208 |
| Countries with the Most Elite Universities | 0 | - | 4.94 | 147,790 |
| Coldest World Capitals | 0 | - | 4.95 | 133,402 |
| World Currency Quiz | 0 | - | 4.91 | 301,424 |
| Countries by Number of Books Published | 0 | - | 4.95 | 72,326 |
| Countries with the Most Billionaires | 0 | - | 4.90 | 334,383 |
| Countries with the Most Millionaires | 0 | - | 4.86 | 123,014 |
| Biggest Export Partners For Every Country | 0 | - | 4.98 | 50,261 |
| Top Oil Reserve Countries | 0 | - | 4.93 | 74,566 |
| Cities with the Biggest Economies | 0 | - | 4.90 | 130,550 |
| NATO Countries | 0 | - | 4.98 | 278,856 |
| EU Countries Quiz | 0 | - | 4.99 | 272,460 |
| Top Five Countries by Religion | 0 | - | 4.93 | 170,516 |
| 7 Deadly Sins | 0 | - | 4.88 | 398,632 |
| Countries with the Most Christians | 0 | - | 4.92 | 142,621 |
| Least Christian Countries with Exceptions | 0 | - | 4.90 | 87,757 |
| Books of the Protestant Bible | 0 | - | 4.89 | 209,170 |
| Majority Muslim Countries | 0 | - | 4.98 | 372,719 |
| Buddhist Countries | 0 | - | 4.96 | 143,592 |
| Planets of the Solar System Quiz | 0 | - | 4.93 | 1,095,111 |
| Category Elimination - Countries #1 | 0 | - | 4.99 | 319,401 |
| MCU Infinity Stones | 0 | - | 4.19 | 20,132 |
| Movies by Plot Hole | 0 | - | 4.34 | 66,179 |
| Movies General Knowledge #1 | 0 | - | 4.06 | 49,681 |
| Justice League Team - Movie Edition | 0 | - | 4.27 | 11,276 |
| Movie Sequels | 0 | - | 4.20 | 82,752 |
| Movie Series by Partial Titles | 0 | - | 4.33 | 75,908 |
| Movies by Spoiler | 0 | - | 4.09 | 51,677 |
| Movies Based on a True Story #1 | 0 | - | 4.19 | 43,186 |
| Biopics Quiz | 0 | - | 4.13 | 41,468 |
| Movies Based on a True Story #2 | 0 | - | 4.31 | 39,801 |
| Major Hollywood Film Studios | 0 | - | 4.44 | 29,451 |
| Highest Grossing Movies - Inflation Adjusted | 0 | - | 4.48 | 84,549 |
| Highest Grossing Movies | 0 | - | 4.48 | 123,529 |
| Movies that have Won the Most Oscars | 0 | - | 4.49 | 59,061 |
| Every Oscar-Nominated Actress | 0 | - | 4.44 | 72,817 |
| Oscar Best Pictures | 0 | - | 4.52 | 309,619 |
| Movie Title Antonyms #1 | 0 | - | 4.81 | 195,248 |
| Obfuscations of Movie Titles #1 | 0 | - | 4.93 | 61,922 |
| Guardians of the Galaxy | 0 | - | 4.15 | 10,163 |
| Star Wars Characters by Screen Time | 0 | - | 4.40 | 110,960 |
| Disney's Frozen Quiz | 0 | - | 4.39 | 23,430 |
| Horror Movie Villains | 0 | - | 4.25 | 87,452 |
| Movies by Opening Scene | 0 | - | 4.42 | 102,900 |
| Famous Movie Scenes #2 | 0 | - | 4.48 | 62,577 |
| Top 50 Comic Book Heroes | 0 | - | 3.95 | 75,592 |
| Supervillain Alter Egos Quiz | 0 | - | 4.14 | 8,685 |
| Avengers Infinity War Deaths | 0 | - | 4.24 | 45,535 |
| Superman Facts | 0 | - | 4.27 | 28,270 |
| Name a Valid Answer - British History | 0 | - | 4.57 | 15,121 |
| Countries of the Mongol Empire on a Map | 0 | - | 4.99 | 106,520 |
| Modern-Day Countries of the British Empire in 1921 | 0 | - | 4.99 | 117,107 |
| Flags of Countries of the World in 1910 | 0 | - | 4.96 | 78,568 |
| World Leaders of the Cold War | 0 | - | 4.27 | 25,234 |
| Biggest US Cities by Decade | 0 | - | 4.95 | 167,588 |
| Names of Generations | 0 | - | 4.10 | 43,229 |
| The Vietnam War | 0 | - | 4.44 | 35,459 |
| Seven Hills of Rome | 0 | - | 4.70 | 9,158 |
| The Life of Alexander the Great | 0 | - | 4.49 | 18,469 |
| Modern-Day Countries of the Umayyad Caliphate on a Map | 0 | - | 4.98 | 68,558 |
| Countries of Europe in 1815 With a Map | 0 | - | 4.99 | 149,755 |
| Countries of Europe in 1848 | 0 | - | 4.99 | 76,039 |
| Countries of Europe in 1870 with a Map | 0 | - | 4.95 | 64,177 |
| Every Country of Europe Since 1815 With a Map | 0 | - | 4.98 | 70,628 |
| Countries of Europe in 1360 with a Map | 0 | - | 4.99 | 56,523 |
| Animals in British History | 0 | - | 4.44 | 25,964 |
| Modern-Day Countries of the Holy Roman Empire on a Map | 0 | - | 4.93 | 45,518 |
| German History A-Z | 0 | - | 4.49 | 24,552 |
| Branches of the U.S. Military | 0 | - | 4.39 | 24,306 |
