| WWII Geography | 0 | - | 4.81 | 119,760 |
| Axis Occupied Countries of WWII | 0 | - | 4.99 | 228,077 |
| WWII Figures by Picture | 0 | - | 4.89 | 61,807 |
| Countries in World War I | 0 | - | 4.88 | 227,271 |
| Countries in World War II | 0 | - | 4.54 | 907,692 |
| Modern-Day Axis-Occupied Countries of WWII on a Map | 0 | - | 4.99 | 85,227 |
| Important Cities in WWII | 0 | - | 4.42 | 93,143 |
| WWII Decoder | 0 | - | 4.41 | 53,281 |
| Name a Valid Answer - World War II | 0 | - | 4.53 | 55,055 |
| World Leaders of the World Wars | 0 | - | 4.35 | 37,730 |
| Cities Bombed During WWII | 0 | - | 4.08 | 30,017 |
| Countries by Percent WWII Deaths | 0 | - | 4.07 | 29,869 |
| Battle to Country | 0 | - | 4.91 | 52,825 |
| The Dictator Files: Adolf Hitler | 0 | - | 4.79 | 77,539 |
| WWII for Dummies | 0 | - | 4.80 | 104,264 |
| Deadliest U.S. Wars | 0 | - | 4.89 | 189,652 |
| Name the English Monarchs | 0 | - | 4.92 | 499,670 |
| Countries with the Most Military Troops | 0 | - | 4.95 | 286,069 |
| Countries with Nuclear Weapons | 0 | - | 4.86 | 269,930 |
| Countries with NO Military | 0 | - | 4.97 | 61,492 |
| WWII A-Z #1 | 0 | - | 4.80 | 102,616 |
| WWII A-Z #2 | 0 | - | 4.44 | 54,456 |
| The American Civil War | 0 | - | 4.62 | 52,254 |
| Marvel Cinematic Universe - All Movies | 0 | - | 4.89 | 335,002 |
| Communist Countries in History | 0 | - | 4.63 | 493,638 |
| Countries with the Most Tanks | 0 | - | 4.91 | 106,659 |
| Military History Vocabulary | 0 | - | 4.91 | 66,816 |
| Star Wars Quotes | 0 | - | 4.83 | 174,030 |
| Name a Disney/Pixar Movie A-Z | 0 | - | 4.84 | 51,064 |
| Countries that Have Won the Most Battles | 0 | - | 4.02 | 39,436 |
| All Disney Animated Movies | 0 | - | 4.78 | 446,656 |
| The Trojan War | 0 | - | 4.83 | 39,536 |
| Greek Mythology General Knowledge #1 | 0 | - | 4.85 | 111,049 |
| Ancient Roman Trivia #1 | 0 | - | 4.85 | 84,230 |
| Roman Emperors | 0 | - | 4.95 | 119,054 |
| The Reign of Queen Elizabeth I | 0 | - | 4.53 | 31,674 |
| Houses of British Monarchs | 0 | - | 4.53 | 65,438 |
| Guess These Badly Described Films | 0 | - | 4.85 | 163,065 |
| Name the 7 Dwarfs | 0 | - | 4.55 | 362,439 |
| Disney Animated Movie Trivia | 0 | - | 4.55 | 74,659 |
| The Reign of Napoleon | 0 | - | 4.54 | 38,807 |
| All Modern-Day Countries Ever Controlled by French People | 0 | - | 4.99 | 57,721 |
| English Royal Consorts | 0 | - | 4.37 | 37,251 |
| Kings of France Quiz | 0 | - | 4.20 | 32,617 |
| Movies by Year, 1990–2009 | 0 | - | 4.21 | 66,582 |
| Pixar Movies Quiz | 0 | - | 4.87 | 430,523 |
| Mulan - "I'll Make A Man Out Of You" Lyrics | 0 | - | 4.61 | 39,108 |
| Countries with U.S. Troops | 0 | - | 4.38 | 131,818 |
| Countries With the Largest Air Forces | 0 | - | 4.47 | 51,328 |
| Major non-NATO U.S. Allies | 0 | - | 4.52 | 51,916 |
| Monster Movies | 0 | - | 4.53 | 31,241 |
| Sci-Fi Movie Quotes | 0 | - | 4.31 | 36,888 |
| Disney's "The Little Mermaid" | 0 | - | 4.41 | 13,742 |
| Disney Heroines | 0 | - | 4.15 | 52,418 |
| Batfacts: The Batman Quiz | 0 | - | 4.49 | 60,513 |
| "A Whole New World" Lyrics | 0 | - | 4.31 | 67,438 |
| Countries of the World in 1938 Quiz | 0 | - | 4.95 | 93,468 |
| History of The Netherlands | 0 | - | 4.46 | 17,352 |
| Historic Journeys on a World Map | 0 | - | 4.99 | 46,381 |
| Countries by Founding Story | 0 | - | 4.95 | 76,810 |
| Countries Invaded by the USSR | 0 | - | 4.29 | 93,742 |
| Independence from Whom | 0 | - | 4.99 | 210,384 |
| Who Controlled These Colonies? | 0 | - | 4.88 | 131,209 |
| Most Recently-Settled Countries | 0 | - | 4.94 | 62,174 |
| Ancient Greek Trivia | 0 | - | 4.62 | 66,854 |
| Geography of Ancient Greece | 0 | - | 4.69 | 31,825 |
| U.S. Five-Star Generals and Admirals | 0 | - | 4.33 | 8,315 |
| Countries Italy Declared War On | 0 | - | 4.75 | 43,117 |
| The Reign of Henry VIII | 0 | - | 4.25 | 27,657 |
| Medieval English History | 0 | - | 4.53 | 43,379 |
| British Royal Titles | 0 | - | 4.18 | 19,900 |
| Elizabeth I... or Elizabeth II? | 0 | - | 4.30 | 24,454 |
| Movies by Year, 1970–1989 | 0 | - | 4.38 | 25,381 |
| Movie Posters by Description | 0 | - | 4.61 | 64,214 |
| Movie Newspaper Headlines | 0 | - | 4.42 | 35,759 |
| Science Fiction Movie Co-Stars | 0 | - | 4.12 | 9,788 |
| Movie Quotes A-Z #1 | 0 | - | 4.31 | 40,852 |
| Star Wars Characters Screen Time by Movie | 0 | - | 4.56 | 28,496 |
| Disney's "The Lion King" | 0 | - | 4.17 | 79,788 |
| Disney's Frozen - Let It Go Lyrics | 0 | - | 4.45 | 72,604 |
| Disney Animals | 0 | - | 4.27 | 239,076 |
| Category Elimination - Disney Animated Movies | 0 | - | 4.08 | 49,402 |
| Disney Feature Films by Characters | 0 | - | 4.42 | 276,816 |
| Batman Actors Quiz | 0 | - | 4.27 | 47,900 |
| Superhero Alter Egos | 0 | - | 4.29 | 164,324 |
| Who Did These Sidekicks Work With? | 0 | - | 4.25 | 109,922 |
| Superhero Decoder | 0 | - | 4.36 | 54,453 |
| Marvel Superheroes | 0 | - | 4.37 | 295,675 |
| Marvel Comics Movie Franchises | 0 | - | 4.29 | 115,430 |
| Avengers Team Members | 0 | - | 4.07 | 77,270 |
| Marvel Cinematic Universe - Actor to Character | 0 | - | 4.11 | 112,719 |
| X-Men Mutants | 0 | - | 4.05 | 47,000 |
| The Spiderman Quiz | 0 | - | 4.31 | 72,296 |
| Top 10 Oldest African Countries | 0 | - | 4.88 | 27,720 |
| Former Flags | 0 | - | 4.97 | 107,073 |
| Countries of the World in 1900 | 0 | - | 4.89 | 84,012 |
| Countries of the World in 1914 with a Map | 0 | - | 4.99 | 193,951 |
| Countries of the World in 1945 with a Map | 0 | - | 5.00 | 149,632 |
| Ancient Greece A-Z | 0 | - | 4.60 | 23,065 |
| States of the German Confederation in 1848 | 0 | - | 4.89 | 31,709 |
| Historic Orient Express Routes Map | 0 | - | 5.00 | 53,203 |
| Greek Mythology General Knowledge #2 | 0 | - | 4.59 | 73,187 |
| Recently Independent Countries | 0 | - | 4.98 | 158,298 |
| Former Capitals | 0 | - | 4.88 | 71,254 |
| WWII First Names | 0 | - | 4.44 | 41,664 |
| Warsaw Pact Countries | 0 | - | 4.83 | 84,346 |
| Historical City to Country | 0 | - | 4.84 | 78,282 |
| Countries by Former Name | 0 | - | 4.99 | 124,606 |
| Cities by Former Name | 0 | - | 4.84 | 91,203 |
| People on Money - United States | 0 | - | 4.31 | 63,252 |
| 100 Most Influential Figures in U.S. History | 0 | - | 4.20 | 44,799 |
| Ancient Roman Trivia #2 | 0 | - | 4.57 | 38,606 |
| Geography of the Roman Empire | 0 | - | 4.56 | 51,760 |
| Roman Names for Places | 0 | - | 4.62 | 58,019 |
| Ancient Greece - Multiple Choice | 0 | - | 4.54 | 41,518 |
| Embarrassing Chapters in British History | 0 | - | 4.29 | 32,167 |
| British History Multiple Choice #1 | 0 | - | 4.46 | 55,028 |
| British History Multiple Choice #2 | 0 | - | 4.42 | 37,884 |
| French History Multiple Choice | 0 | - | 4.55 | 32,932 |
| Countries of Europe in 1444 | 0 | - | 4.92 | 99,115 |
| Countries of the World in 1444 | 0 | - | 4.98 | 59,822 |
| Modern-Day Countries of the Inca Empire on a Map | 0 | - | 4.83 | 57,085 |
| Modern Day Countries of the Kushan Empire on a Map | 0 | - | 4.89 | 24,638 |
| All Modern-Day Countries Ever Controlled by Turkic People | 0 | - | 4.94 | 40,817 |
| All Modern-Day Countries Ever Controlled by Arab People with a Map | 0 | - | 4.98 | 55,056 |
| All Modern-Day Countries Ever Controlled by the Seljuks | 0 | - | 4.92 | 28,360 |
| Countries of Europe before World War II with a Map | 0 | - | 4.94 | 52,691 |
| Countries of the World in 1882 with a Map | 0 | - | 4.89 | 43,911 |
| British History A-Z #1 | 0 | - | 4.45 | 46,270 |
| History of Scotland | 0 | - | 4.51 | 21,033 |
| French History A-Z | 0 | - | 4.22 | 24,328 |
| Countries Settled by Vikings | 0 | - | 4.93 | 121,048 |
| Countries with the Most Elite Universities | 0 | - | 4.94 | 147,280 |
| Coldest World Capitals | 0 | - | 4.95 | 133,183 |
| World Currency Quiz | 0 | - | 4.92 | 300,034 |
| Countries by Number of Books Published | 0 | - | 4.95 | 72,112 |
| Countries with the Most Billionaires | 0 | - | 4.90 | 333,726 |
| Countries with the Most Millionaires | 0 | - | 4.86 | 122,606 |
| Biggest Export Partners For Every Country | 0 | - | 4.98 | 50,001 |
| Top Oil Reserve Countries | 0 | - | 4.93 | 74,370 |
| Cities with the Biggest Economies | 0 | - | 4.91 | 130,014 |
| NATO Countries | 0 | - | 4.98 | 277,660 |
| EU Countries Quiz | 0 | - | 4.99 | 271,260 |
| Top Five Countries by Religion | 0 | - | 4.93 | 169,810 |
| 7 Deadly Sins | 0 | - | 4.88 | 397,253 |
| Countries with the Most Christians | 0 | - | 4.92 | 142,135 |
| Least Christian Countries with Exceptions | 0 | - | 4.90 | 87,363 |
| Books of the Protestant Bible | 0 | - | 4.89 | 208,406 |
| Majority Muslim Countries | 0 | - | 4.98 | 371,374 |
| Buddhist Countries | 0 | - | 4.96 | 143,303 |
| Planets of the Solar System Quiz | 0 | - | 4.93 | 1,093,221 |
| Category Elimination - Countries #1 | 0 | - | 4.99 | 318,255 |
| MCU Infinity Stones | 0 | - | 4.19 | 20,028 |
| Movies by Plot Hole | 0 | - | 4.34 | 65,878 |
| Movies General Knowledge #1 | 0 | - | 4.05 | 49,486 |
| Justice League Team - Movie Edition | 0 | - | 4.27 | 11,252 |
| Movie Sequels | 0 | - | 4.20 | 82,544 |
| Movie Series by Partial Titles | 0 | - | 4.33 | 75,749 |
| Movies by Spoiler | 0 | - | 4.09 | 51,525 |
| Movies Based on a True Story #1 | 0 | - | 4.19 | 43,059 |
| Biopics Quiz | 0 | - | 4.13 | 41,395 |
| Movies Based on a True Story #2 | 0 | - | 4.31 | 39,707 |
| Major Hollywood Film Studios | 0 | - | 4.43 | 29,380 |
| Highest Grossing Movies - Inflation Adjusted | 0 | - | 4.47 | 84,469 |
| Highest Grossing Movies | 0 | - | 4.48 | 123,281 |
| Movies that have Won the Most Oscars | 0 | - | 4.49 | 58,845 |
| Every Oscar-Nominated Actress | 0 | - | 4.44 | 72,526 |
| Oscar Best Pictures | 0 | - | 4.52 | 308,798 |
| Movie Title Antonyms #1 | 0 | - | 4.81 | 194,922 |
| Obfuscations of Movie Titles #1 | 0 | - | 4.93 | 61,851 |
| Guardians of the Galaxy | 0 | - | 4.15 | 10,130 |
| Star Wars Characters by Screen Time | 0 | - | 4.40 | 110,379 |
| Disney's Frozen Quiz | 0 | - | 4.39 | 23,379 |
| Horror Movie Villains | 0 | - | 4.24 | 87,025 |
| Movies by Opening Scene | 0 | - | 4.42 | 102,556 |
| Famous Movie Scenes #2 | 0 | - | 4.48 | 62,486 |
| Top 50 Comic Book Heroes | 0 | - | 3.95 | 75,535 |
| Supervillain Alter Egos Quiz | 0 | - | 4.14 | 8,659 |
| Avengers Infinity War Deaths | 0 | - | 4.24 | 45,422 |
| Superman Facts | 0 | - | 4.27 | 28,232 |
| Name a Valid Answer - British History | 0 | - | 4.57 | 15,103 |
| Countries of the Mongol Empire on a Map | 0 | - | 4.99 | 106,232 |
| Modern-Day Countries of the British Empire in 1921 | 0 | - | 4.99 | 116,736 |
| Flags of Countries of the World in 1910 | 0 | - | 4.96 | 78,358 |
| World Leaders of the Cold War | 0 | - | 4.27 | 25,185 |
| Biggest US Cities by Decade | 0 | - | 4.95 | 167,352 |
| The Vietnam War | 0 | - | 4.43 | 35,378 |
| Seven Hills of Rome | 0 | - | 4.70 | 9,130 |
| The Life of Alexander the Great | 0 | - | 4.49 | 18,448 |
| Modern-Day Countries of the Umayyad Caliphate on a Map | 0 | - | 4.98 | 68,416 |
| Countries of Europe in 1815 With a Map | 0 | - | 4.99 | 149,426 |
| Countries of Europe in 1848 | 0 | - | 4.98 | 75,771 |
| Countries of Europe in 1870 with a Map | 0 | - | 4.95 | 63,879 |
| Every Country of Europe Since 1815 With a Map | 0 | - | 4.98 | 70,420 |
| Countries of Europe in 1360 with a Map | 0 | - | 4.99 | 56,300 |
| Animals in British History | 0 | - | 4.44 | 25,921 |
| Modern-Day Countries of the Holy Roman Empire on a Map | 0 | - | 4.93 | 45,401 |
| German History A-Z | 0 | - | 4.49 | 24,496 |
| Branches of the U.S. Military | 0 | - | 4.40 | 24,234 |
| World Capitals in the Answer | 0 | - | 4.94 | 76,553 |
