| WWII Geography | 0 | - | 4.81 | 119,690 |
| WWII Figures by Picture | 0 | - | 4.85 | 58,339 |
| 17th Century A-Z | 0 | - | 4.78 | 34,219 |
| Military History Vocabulary | 0 | - | 4.91 | 66,802 |
| Axis Occupied Countries of WWII | 0 | - | 4.99 | 227,976 |
| Countries in World War I | 0 | - | 4.88 | 227,153 |
| Modern-Day Axis-Occupied Countries of WWII on a Map | 0 | - | 4.99 | 85,138 |
| Countries with the Most Military Troops | 0 | - | 4.95 | 285,975 |
| Countries with Nuclear Weapons | 0 | - | 4.86 | 269,810 |
| Countries with NO Military | 0 | - | 4.97 | 61,454 |
| The Dictator Files: Adolf Hitler | 0 | - | 4.79 | 77,522 |
| WWII Decoder | 0 | - | 4.41 | 53,228 |
| Name a Valid Answer - World War II | 0 | - | 4.53 | 55,000 |
| WWII for Dummies | 0 | - | 4.80 | 104,232 |
| Countries with the Most Tanks | 0 | - | 4.91 | 106,627 |
| World Leaders of the World Wars | 0 | - | 4.35 | 37,724 |
| Countries in World War II | 0 | - | 4.54 | 907,382 |
| 1950s Decade Quiz | 0 | - | 4.41 | 48,983 |
| 1960s Decade Quiz #2 | 0 | - | 4.45 | 44,585 |
| Battle to Country | 0 | - | 4.91 | 52,774 |
| WWII Movies by Plot | 0 | - | 4.21 | 27,008 |
| Deadliest U.S. Wars | 0 | - | 4.89 | 189,635 |
| Name the English Monarchs | 0 | - | 4.92 | 499,522 |
| G7 Leaders Since 2003 | 0 | - | 4.48 | 46,235 |
| Important Cities in WWII | 0 | - | 4.42 | 93,100 |
| WWII First Names | 0 | - | 4.44 | 41,647 |
| 1960s Decade Quiz #1 | 0 | - | 4.40 | 49,776 |
| The American Civil War | 0 | - | 4.62 | 52,244 |
| Were They Alive During This? | 0 | - | 4.94 | 47,342 |
| "Second Best" History Edition | 0 | - | 4.94 | 62,257 |
| Famous Dictators #1 | 0 | - | 4.69 | 199,095 |
| WWI... or WWII? | 0 | - | 4.85 | 141,203 |
| The 17th Century | 0 | - | 4.54 | 53,708 |
| 1940s Decade Quiz | 0 | - | 4.51 | 51,725 |
| 2010s Decade Quiz | 0 | - | 4.53 | 101,383 |
| Historical Leaders by Date #1 | 0 | - | 4.48 | 31,274 |
| Historical Leaders by Date #2 | 0 | - | 4.55 | 30,108 |
| Historical Rulers #2 | 0 | - | 4.26 | 47,285 |
| Historical Rulers #1 | 0 | - | 4.35 | 118,606 |
| Former Countries by Territory Map | 0 | - | 4.96 | 101,993 |
| Empires by Maps | 0 | - | 4.98 | 119,106 |
| Words for Leaders | 0 | - | 4.77 | 255,792 |
| World Leaders Quiz #1 | 0 | - | 4.11 | 109,767 |
| Ultimate 20th Century History Quiz | 0 | - | 4.86 | 53,396 |
| The 7 Wonders of the Ancient World | 0 | - | 4.85 | 82,190 |
| Quiz on the Year 2001 | 0 | - | 4.48 | 24,198 |
| 20th Century A-Z | 0 | - | 4.50 | 53,256 |
| 19th Century A-Z | 0 | - | 4.77 | 46,812 |
| 18th Century A-Z | 0 | - | 4.54 | 42,696 |
| Countries with U.S. Troops | 0 | - | 4.38 | 131,802 |
| Countries With the Largest Air Forces | 0 | - | 4.47 | 51,319 |
| Major non-NATO U.S. Allies | 0 | - | 4.52 | 51,901 |
| Metals of Antiquity | 0 | - | 4.94 | 93,081 |
| Popular Royal Names | 0 | - | 4.27 | 124,651 |
| History of The Netherlands | 0 | - | 4.46 | 17,351 |
| Historic Journeys on a World Map | 0 | - | 4.99 | 46,365 |
| History: What Came First? #1 | 0 | - | 4.87 | 104,465 |
| Play-Doh People from History | 0 | - | 4.99 | 94,175 |
| History - Did They Have It? | 0 | - | 4.84 | 61,280 |
| Famous Dictators #2 | 0 | - | 4.31 | 87,216 |
| Mythical Creatures Quiz #1 | 0 | - | 4.92 | 705,356 |
| First Names of Painters | 0 | - | 4.43 | 59,691 |
| Cities Bombed During WWII | 0 | - | 4.08 | 29,998 |
| Countries by Percent WWII Deaths | 0 | - | 4.07 | 29,851 |
| NBA Basketball by Year, 1970–1999 | 0 | - | 4.28 | 44,840 |
| NBA Basketball by Year, 2000–Present | 0 | - | 4.33 | 60,439 |
| 16th Century A-Z | 0 | - | 4.58 | 24,434 |
| 15th Century A-Z | 0 | - | 4.49 | 23,429 |
| 14th Century A-Z | 0 | - | 4.41 | 23,847 |
| 1970s Decade Quiz | 0 | - | 4.20 | 52,427 |
| 2000s Decade Quiz | 0 | - | 4.23 | 120,415 |
| 1980s Decade Quiz | 0 | - | 4.38 | 76,502 |
| 1910s Decade Quiz | 0 | - | 4.20 | 52,412 |
| 1930s Decade Quiz | 0 | - | 4.28 | 48,811 |
| 1920s Decade Quiz | 0 | - | 4.33 | 49,473 |
| 1990s Decade Quiz | 0 | - | 4.01 | 54,697 |
| 1850s Decade Quiz | 0 | - | 4.42 | 35,019 |
| 1790s Decade Quiz | 0 | - | 4.55 | 33,466 |
| 1800s Decade Quiz | 0 | - | 4.47 | 31,753 |
| Countries that Have Won the Most Battles | 0 | - | 4.02 | 39,433 |
| Countries Italy Declared War On | 0 | - | 4.75 | 43,110 |
| Years in History #1 - Multiple Choice | 0 | - | 4.85 | 69,801 |
| Top 10 Oldest African Countries | 0 | - | 4.88 | 27,703 |
| Influential Women in History | 0 | - | 4.42 | 35,247 |
| Cradles of Civilization | 0 | - | 4.46 | 39,318 |
| Former Flags | 0 | - | 4.97 | 107,052 |
| Ancient Greece A-Z | 0 | - | 4.60 | 23,062 |
| Materials From History #1 | 0 | - | 4.56 | 51,289 |
| States of the German Confederation in 1848 | 0 | - | 4.89 | 31,704 |
| Historical Countries by Ruler | 0 | - | 4.48 | 48,330 |
| Historic Orient Express Routes Map | 0 | - | 5.00 | 53,189 |
| Trace the Route of Ibn Battuta on a Map | 0 | - | 4.99 | 22,471 |
| World Leaders Quiz #2 | 0 | - | 4.00 | 35,722 |
| UN Secretaries-General | 0 | - | 4.40 | 7,773 |
| Benevolent Dictators and Enlightened Despots | 0 | - | 4.01 | 19,567 |
| WWII A-Z #1 | 0 | - | 4.80 | 102,589 |
| WWII A-Z #2 | 0 | - | 4.44 | 54,439 |
| Cold War Decoder | 0 | - | 4.83 | 52,075 |
| Name a Valid Year in History | 0 | - | 4.93 | 66,670 |
| Biggest Nations and Empires Ever | 0 | - | 4.46 | 145,451 |
| Famous Explorers | 0 | - | 4.58 | 36,034 |
| Famous Empires by Description | 0 | - | 4.73 | 118,109 |
| Answers by Time Period | 0 | - | 4.63 | 55,383 |
| Quiz on the Year 1997 | 0 | - | 4.39 | 20,935 |
| Quiz on the Year 1998 | 0 | - | 4.33 | 17,230 |
| Quiz on the Year 2000 | 0 | - | 4.08 | 21,124 |
| 1900s Decade Quiz | 0 | - | 4.18 | 44,059 |
| 1860s Decade Quiz | 0 | - | 4.31 | 40,220 |
| 1880s Decade Quiz | 0 | - | 4.24 | 39,251 |
| 1890s Decade Quiz | 0 | - | 4.24 | 39,653 |
| 1870s Decade Quiz | 0 | - | 4.28 | 36,485 |
| 1840s Decade Quiz | 0 | - | 4.30 | 37,496 |
| 1810s Decade Quiz | 0 | - | 4.58 | 30,829 |
| 1820s Decade Quiz | 0 | - | 4.54 | 29,710 |
| 1830s Decade Quiz | 0 | - | 4.42 | 29,075 |
| Modern Day Countries of the Kushan Empire on a Map | 0 | - | 4.89 | 24,625 |
| All Modern-Day Countries Ever Controlled by Turkic People | 0 | - | 4.94 | 40,810 |
| All Modern-Day Countries Ever Controlled by Arab People with a Map | 0 | - | 4.98 | 55,038 |
| All Modern-Day Countries Ever Controlled by the Seljuks | 0 | - | 4.92 | 28,351 |
| Countries Visited by Christopher Columbus | 0 | - | 4.85 | 21,810 |
| European History for Dummies | 0 | - | 4.83 | 89,521 |
| The Reign of Queen Elizabeth I | 0 | - | 4.53 | 31,665 |
| British History A-Z #1 | 0 | - | 4.45 | 46,259 |
| Houses of British Monarchs | 0 | - | 4.53 | 65,418 |
| Countries with the Most Elite Universities | 0 | - | 4.94 | 147,229 |
| Coldest World Capitals | 0 | - | 4.95 | 133,172 |
| World Currency Quiz | 0 | - | 4.92 | 299,922 |
| Countries by Number of Books Published | 0 | - | 4.95 | 72,092 |
| Countries with the Most Billionaires | 0 | - | 4.90 | 333,666 |
| Countries with the Most Millionaires | 0 | - | 4.86 | 122,566 |
| Biggest Export Partners For Every Country | 0 | - | 4.98 | 49,975 |
| Top Oil Reserve Countries | 0 | - | 4.93 | 74,359 |
| Cities with the Biggest Economies | 0 | - | 4.91 | 129,988 |
| NATO Countries | 0 | - | 4.98 | 277,573 |
| EU Countries Quiz | 0 | - | 4.99 | 271,173 |
| Top Five Countries by Religion | 0 | - | 4.93 | 169,757 |
| 7 Deadly Sins | 0 | - | 4.88 | 397,115 |
| Countries with the Most Christians | 0 | - | 4.92 | 142,081 |
| Least Christian Countries with Exceptions | 0 | - | 4.90 | 87,325 |
| Books of the Protestant Bible | 0 | - | 4.89 | 208,288 |
| Majority Muslim Countries | 0 | - | 4.98 | 371,233 |
| Buddhist Countries | 0 | - | 4.96 | 143,272 |
| Planets of the Solar System Quiz | 0 | - | 4.93 | 1,093,024 |
| Category Elimination - Countries #1 | 0 | - | 4.99 | 318,146 |
| U.S. Celebrity Gossip by Year, 1991–2009 | 0 | - | 3.75 | 38,147 |
| Years in History by Picture | 0 | - | 4.44 | 35,255 |
| Historical Events - AD or BC? | 0 | - | 4.70 | 57,316 |
| Materials From History #2 | 0 | - | 4.59 | 31,363 |
| People Who Have Been Considered Gods | 0 | - | 4.48 | 24,285 |
| World Leaders of the Cold War | 0 | - | 4.27 | 25,181 |
| Five Most Guessed World Leaders by Country | 0 | - | 4.20 | 48,197 |
| Normandy D-Day Beaches | 0 | - | 4.83 | 40,220 |
| Territory Changes in World War I | 0 | - | 4.87 | 46,388 |
| 20th Century Dates Quiz | 0 | - | 4.56 | 39,349 |
| Events in History #2 | 0 | - | 4.49 | 71,523 |
| Events in History #4 | 0 | - | 4.44 | 44,171 |
| Infamous Criminals - Mostly U.S. | 0 | - | 4.21 | 48,880 |
| Assassinations in History | 0 | - | 4.21 | 66,063 |
| Famous Seconds | 0 | - | 4.22 | 46,471 |
| Ages and Eras | 0 | - | 4.38 | 67,553 |
| Celebrity Knights of the United Kingdom | 0 | - | 4.23 | 39,432 |
| Titled People Quiz #1 | 0 | - | 4.11 | 45,686 |
| Titled People Quiz #3 | 0 | - | 4.34 | 43,097 |
| Job Titles Quiz #1 | 0 | - | 4.22 | 75,885 |
| Female Historical Figures | 0 | - | 4.27 | 33,157 |
| Historical Blunders | 0 | - | 4.34 | 91,789 |
| Territorial Accessions | 0 | - | 4.39 | 34,692 |
| People Known as "The Great" | 0 | - | 4.46 | 24,577 |
| Political Quotes | 0 | - | 4.17 | 19,836 |
| This Day in History - July | 0 | - | 4.49 | 36,401 |
| This Day in History - August | 0 | - | 4.42 | 43,294 |
| This Day in History - September | 0 | - | 4.55 | 57,328 |
| This Day in History - October | 0 | - | 4.49 | 37,578 |
| This Day in History - January | 0 | - | 4.50 | 46,627 |
| This Day in History - March | 0 | - | 4.45 | 43,577 |
| Ancient Civilizations | 0 | - | 4.64 | 37,821 |
| Quiz on the Year 1908 | 0 | - | 4.25 | 12,862 |
| 1780s Decade Quiz | 0 | - | 4.36 | 25,462 |
| The Reign of Napoleon | 0 | - | 4.54 | 38,802 |
| The Places They Went #1 | 0 | - | 4.74 | 33,463 |
| The Life of King David | 0 | - | 4.37 | 14,086 |
| Famous Inventors | 0 | - | 4.43 | 43,485 |
| Trace the Route of Marco Polo on a Map | 0 | - | 5.00 | 42,070 |
| English Royal Consorts | 0 | - | 4.37 | 37,246 |
| Kings of France Quiz | 0 | - | 4.20 | 32,613 |
| German History A-Z | 0 | - | 4.49 | 24,495 |
| 40 Historical People that Everyone Should Know | 0 | - | 4.09 | 1,011,916 |
| Name that Historical Figure #1 | 0 | - | 4.63 | 336,252 |
| 1980s Movie Silhouettes | 0 | - | 4.97 | 103,093 |
| 1990s Movie Silhouettes | 0 | - | 4.98 | 98,277 |
| Branches of the U.S. Military | 0 | - | 4.40 | 24,232 |
| World Capitals in the Answer | 0 | - | 4.94 | 76,537 |
| Monarchies of Europe | 0 | - | 4.90 | 97,596 |
| Monarchies of Asia | 0 | - | 4.97 | 70,766 |
| Top 10 Coldest European Countries | 0 | - | 4.94 | 192,523 |
| Top 10 Hottest European Countries | 0 | - | 4.89 | 126,400 |
| Top 10 Coldest Asian Countries | 0 | - | 4.95 | 122,633 |
| Capital Cities with the Least Precipitation | 0 | - | 4.89 | 29,077 |
| Five Biggest Economies by Continent | 0 | - | 4.98 | 194,354 |
| Countries with the Most Exports | 0 | - | 4.96 | 154,583 |
