| The Dictator Files: Adolf Hitler | 0 | - | 4.79 | 77,665 |
| Axis Occupied Countries of WWII | 0 | - | 4.99 | 228,434 |
| Modern-Day Axis-Occupied Countries of WWII on a Map | 0 | - | 4.99 | 85,472 |
| Countries in World War I | 0 | - | 4.88 | 227,571 |
| Countries in World War II | 0 | - | 4.54 | 909,169 |
| WWII First Names | 0 | - | 4.44 | 41,699 |
| Important Cities in WWII | 0 | - | 4.42 | 93,244 |
| Words for Leaders | 0 | - | 4.77 | 256,411 |
| Political Figures by Last Name #1 | 0 | - | 4.55 | 67,722 |
| WWII for Dummies | 0 | - | 4.80 | 104,500 |
| Name the English Monarchs | 0 | - | 4.92 | 500,527 |
| Prime Ministers of the UK | 0 | - | 4.95 | 436,995 |
| Cities Bombed During WWII | 0 | - | 4.08 | 30,060 |
| Countries by Percent WWII Deaths | 0 | - | 4.07 | 29,916 |
| World Leaders by Picture | 0 | - | 4.36 | 264,461 |
| Canadian Prime Ministers | 0 | - | 4.63 | 57,323 |
| G7 Leaders Since 2003 | 0 | - | 4.48 | 46,305 |
| Famous Dictators #1 | 0 | - | 4.69 | 199,285 |
| Dictators by Picture | 0 | - | 4.18 | 49,029 |
| Historical Leaders by Date #1 | 0 | - | 4.48 | 31,314 |
| Historical Leaders by Date #2 | 0 | - | 4.55 | 30,142 |
| Historical Rulers #2 | 0 | - | 4.26 | 47,335 |
| Historical Rulers #1 | 0 | - | 4.35 | 118,699 |
| World Leaders Quiz #1 | 0 | - | 4.11 | 109,846 |
| The Dictator Files: Vladimir Lenin | 0 | - | 4.45 | 26,728 |
| The Reign of Napoleon | 0 | - | 4.54 | 38,850 |
| Spouses of World Leaders | 0 | - | 4.18 | 12,305 |
| First Names of Recent World Leaders | 0 | - | 4.25 | 24,929 |
| Five Most Guessed World Leaders by Country | 0 | - | 4.20 | 48,431 |
| Famous Dictators #2 | 0 | - | 4.31 | 87,300 |
| The Dictator Files: Saddam Hussein | 0 | - | 4.48 | 15,810 |
| Battle to Country | 0 | - | 4.91 | 52,997 |
| U.S. Cabinet Departments | 0 | - | 4.86 | 72,724 |
| World Leaders Quiz #2 | 0 | - | 4.00 | 35,769 |
| UN Secretaries-General | 0 | - | 4.40 | 7,781 |
| Prime Ministers of Australia | 0 | - | 4.50 | 31,806 |
| Benevolent Dictators and Enlightened Despots | 0 | - | 4.01 | 19,581 |
| WWII A-Z #1 | 0 | - | 4.78 | 102,730 |
| WWII A-Z #2 | 0 | - | 4.44 | 54,520 |
| WWII Decoder | 0 | - | 4.41 | 53,391 |
| Deadliest U.S. Wars | 0 | - | 4.89 | 190,168 |
| Letters of the Greek Alphabet | 0 | - | 4.97 | 645,107 |
| Name that Greek Letter | 0 | - | 4.93 | 322,746 |
| Countries Italy Declared War On | 0 | - | 4.75 | 43,177 |
| The Reign of Queen Elizabeth I | 0 | - | 4.53 | 31,704 |
| Houses of British Monarchs | 0 | - | 4.53 | 65,509 |
| The Trojan War | 0 | - | 4.83 | 39,594 |
| Greek Mythology General Knowledge #1 | 0 | - | 4.85 | 111,289 |
| 101 Figures from Greek Mythology | 0 | - | 4.99 | 125,213 |
| WWI... or WWII? | 0 | - | 4.85 | 141,570 |
| Places Where Winston Churchill Said We Would Fight the Nazis | 0 | - | 4.57 | 14,583 |
| Countries Invaded by the USSR | 0 | - | 4.29 | 93,824 |
| Ancient Roman Trivia #1 | 0 | - | 4.85 | 84,330 |
| Roman Emperors | 0 | - | 4.95 | 119,417 |
| British History A-Z #1 | 0 | - | 4.45 | 46,330 |
| "Second Best" History Edition | 0 | - | 4.94 | 62,535 |
| Political Figures by Last Name #2 | 0 | - | 3.88 | 16,668 |
| World Leaders of the Cold War | 0 | - | 4.27 | 25,221 |
| The Dictator Files: Fidel Castro | 0 | - | 4.19 | 12,290 |
| Name the Popes Quiz | 0 | - | 4.47 | 137,667 |
| Countries of the Popes | 0 | - | 4.79 | 127,672 |
| The Vietnam War | 0 | - | 4.43 | 35,428 |
| Political Quotes | 0 | - | 4.17 | 19,857 |
| English Royal Consorts | 0 | - | 4.37 | 37,284 |
| Former Countries by Territory Map | 0 | - | 4.96 | 102,303 |
| Empires by Maps | 0 | - | 4.98 | 119,593 |
| Paramount Leaders of China | 0 | - | 4.36 | 11,037 |
| Ultimate 20th Century History Quiz | 0 | - | 4.86 | 53,501 |
| The Life of Winston Churchill | 0 | - | 4.16 | 11,831 |
| Communist Countries in History | 0 | - | 4.63 | 494,225 |
| The 7 Wonders of the Ancient World | 0 | - | 4.85 | 82,272 |
| The Reign of Queen Elizabeth II | 0 | - | 4.36 | 35,777 |
| German History A-Z | 0 | - | 4.49 | 24,534 |
| European Secessionist Movements on a Map | 0 | - | 4.53 | 34,872 |
| Top 10 Oldest African Countries | 0 | - | 4.88 | 27,795 |
| Metals of Antiquity | 0 | - | 4.94 | 93,191 |
| Historic Journeys on a World Map | 0 | - | 4.99 | 46,487 |
| History: What Came First? #1 | 0 | - | 4.87 | 104,894 |
| History - Did They Have It? | 0 | - | 4.84 | 61,547 |
| The Dictator Files: Chairman Mao | 0 | - | 4.28 | 20,633 |
| The Dictator Files: Benito Mussolini | 0 | - | 4.65 | 23,393 |
| Mythical Creatures Quiz #1 | 0 | - | 4.92 | 706,034 |
| Greek Mythology General Knowledge #2 | 0 | - | 4.59 | 73,317 |
| Name a Valid Answer - World War II | 0 | - | 4.53 | 55,188 |
| WWII True or False? | 0 | - | 4.56 | 57,317 |
| Ancient Roman Trivia #2 | 0 | - | 4.57 | 38,651 |
| Geography of the Roman Empire | 0 | - | 4.56 | 51,813 |
| Roman Names for Places | 0 | - | 4.62 | 58,091 |
| Ancient Greece - Multiple Choice | 0 | - | 4.54 | 41,560 |
| Countries that Have Won the Most Battles | 0 | - | 4.02 | 39,477 |
| Years in History #1 - Multiple Choice | 0 | - | 4.85 | 70,087 |
| British History Multiple Choice #1 | 0 | - | 4.46 | 55,065 |
| British History Multiple Choice #2 | 0 | - | 4.42 | 37,905 |
| All Modern-Day Countries Ever Controlled by Turkic People | 0 | - | 4.94 | 40,888 |
| All Modern-Day Countries Ever Controlled by Arab People with a Map | 0 | - | 4.98 | 55,152 |
| The Reign of Henry VIII | 0 | - | 4.25 | 27,690 |
| British Royal Titles | 0 | - | 4.18 | 19,916 |
| Elizabeth I... or Elizabeth II? | 0 | - | 4.30 | 24,468 |
| The Reign of Queen Victoria | 0 | - | 4.33 | 23,395 |
| French History A-Z | 0 | - | 4.22 | 24,455 |
| NATO Countries | 0 | - | 4.98 | 278,477 |
| EU Countries Quiz | 0 | - | 4.99 | 272,040 |
| U.S. Federal Agency Acronyms | 0 | - | 4.50 | 79,873 |
| U.S. States by Governor | 0 | - | 4.43 | 18,026 |
| U.S. Political Parties in History | 0 | - | 4.44 | 27,634 |
| U.S. Government Agencies | 0 | - | 4.44 | 19,617 |
| Red State or Blue State Trait? | 0 | - | 4.42 | 55,161 |
| Name a Valid Answer - British History | 0 | - | 4.57 | 15,119 |
| Influential Women in History | 0 | - | 4.42 | 35,384 |
| Cradles of Civilization | 0 | - | 4.46 | 39,449 |
| Former Flags | 0 | - | 4.97 | 107,271 |
| Materials From History #1 | 0 | - | 4.56 | 51,385 |
| States of the German Confederation in 1848 | 0 | - | 4.90 | 31,802 |
| Historical Countries by Ruler | 0 | - | 4.48 | 48,435 |
| Historic Orient Express Routes Map | 0 | - | 4.99 | 53,282 |
| The Dictator Files: Joseph Stalin | 0 | - | 4.37 | 48,406 |
| Pope Facts | 0 | - | 4.39 | 31,149 |
| Biggest US Cities by Decade | 0 | - | 4.95 | 167,513 |
| Cold War Decoder | 0 | - | 4.83 | 52,164 |
| Name a Valid Year in History | 0 | - | 4.93 | 66,848 |
| Biggest Nations and Empires Ever | 0 | - | 4.52 | 145,598 |
| Famous Explorers | 0 | - | 4.58 | 36,078 |
| Famous Empires by Description | 0 | - | 4.73 | 118,229 |
| Answers by Time Period | 0 | - | 4.64 | 55,453 |
| The American Civil War | 0 | - | 4.62 | 52,313 |
| U.S. Civil War Decoder | 0 | - | 4.14 | 25,234 |
| Seven Hills of Rome | 0 | - | 4.70 | 9,147 |
| The Life of Alexander the Great | 0 | - | 4.49 | 18,460 |
| Military History Vocabulary | 0 | - | 4.91 | 66,917 |
| The Life of King David | 0 | - | 4.37 | 14,103 |
| Modern Day Countries of the Kushan Empire on a Map | 0 | - | 4.89 | 24,720 |
| All Modern-Day Countries Ever Controlled by the Seljuks | 0 | - | 4.92 | 28,412 |
| European History for Dummies | 0 | - | 4.83 | 89,636 |
| English First Names of the Middle Ages | 0 | - | 4.47 | 60,523 |
| British History Quiz for Dummies | 0 | - | 4.70 | 78,383 |
| Animals in British History | 0 | - | 4.44 | 25,947 |
| Kings of France Quiz | 0 | - | 4.20 | 32,638 |
| U.S. Citizenship Test Questions | 0 | - | 4.83 | 238,941 |
| The U.S. Government - How Does it Work? | 0 | - | 4.34 | 42,292 |
| All UK Parliament Constituencies on a Map | 0 | - | 4.60 | 28,667 |
| World Capitals in the Answer | 0 | - | 4.94 | 76,678 |
| Monarchies of Europe | 0 | - | 4.90 | 97,769 |
| Monarchies of Asia | 0 | - | 4.97 | 70,876 |
| Capitals of Countries with the Biggest Economies | 0 | - | 4.93 | 94,952 |
| Countries with the Most Christians | 0 | - | 4.92 | 142,447 |
| Five Countries with Most Christians by Continent | 0 | - | 4.99 | 111,204 |
| Least Christian Countries with Exceptions | 0 | - | 4.90 | 87,617 |
| Countries Mentioned in the Bible | 0 | - | 4.96 | 66,603 |
| Countries with the Most Catholics | 0 | - | 4.90 | 108,774 |
| Catholic Countries in Europe | 0 | - | 4.83 | 94,671 |
| Orthodox Countries | 0 | - | 4.92 | 131,043 |
| Divided World City Name Puzzle #1 | 0 | - | 4.87 | 48,416 |
| Divided World City Name Puzzle #2 | 0 | - | 4.83 | 36,718 |
| Marvel Cinematic Universe - All Movies | 0 | - | 4.89 | 336,169 |
| Asian Country Superlatives | 0 | - | 4.83 | 80,689 |
| Body Parts in History and Culture | 0 | - | 4.43 | 35,222 |
| History Analogies #1 | 0 | - | 4.53 | 89,877 |
| History Analogies #2 | 0 | - | 4.49 | 77,117 |
| Current Events by Year, 1990–2009 | 0 | - | 4.77 | 152,388 |
| Current Events by Year, 1970–1989 | 0 | - | 4.56 | 65,078 |
| Current Events by Year, 1930–1949 | 0 | - | 4.48 | 52,015 |
| Groups of Things - History #1 | 0 | - | 4.41 | 93,899 |
| History Analogies #3 | 0 | - | 4.61 | 80,558 |
| Biggest Countries in Europe in 1700 | 0 | - | 4.73 | 58,326 |
| Spanish History A-Z | 0 | - | 4.37 | 19,238 |
| Italian History A-Z | 0 | - | 4.21 | 17,638 |
| Years in History by Picture | 0 | - | 4.44 | 35,370 |
| Historical Events - AD or BC? | 0 | - | 4.70 | 57,448 |
| Materials From History #2 | 0 | - | 4.59 | 31,422 |
| Random History by Country | 0 | - | 4.53 | 34,761 |
| Valid Answer - World History #1 | 0 | - | 4.56 | 61,747 |
| Animals in World History | 0 | - | 4.74 | 44,378 |
| People - Real or Fictional? | 0 | - | 4.56 | 58,664 |
| Places - Real or Fictional? | 0 | - | 4.59 | 49,487 |
| History True or False #3 | 0 | - | 4.43 | 56,637 |
| Prime Ministers of Israel | 0 | - | 3.97 | 17,894 |
| Soviet Leaders 1917–1991 | 0 | - | 4.43 | 94,726 |
| Mythology A-Z | 0 | - | 4.31 | 37,126 |
| WWII Geography | 0 | - | 4.81 | 119,966 |
| Normandy D-Day Beaches | 0 | - | 4.83 | 40,307 |
| WWII Figures by Picture | 0 | - | 4.89 | 64,521 |
| Territory Changes in World War I | 0 | - | 4.87 | 46,547 |
| Cold War Trivia #1 | 0 | - | 4.42 | 57,139 |
| 20th Century Dates Quiz | 0 | - | 4.56 | 39,369 |
| Events in History #2 | 0 | - | 4.49 | 71,590 |
| Events in History #4 | 0 | - | 4.44 | 44,226 |
| Events in Ancient History | 0 | - | 4.50 | 35,869 |
| Infamous Criminals - Mostly U.S. | 0 | - | 4.21 | 48,924 |
| Assassinations in History | 0 | - | 4.21 | 66,112 |
| Famous Seconds | 0 | - | 4.22 | 46,511 |
| Ages and Eras | 0 | - | 4.38 | 67,598 |
| Celebrity Knights of the United Kingdom | 0 | - | 4.23 | 39,457 |
| Titled People Quiz #1 | 0 | - | 4.11 | 45,732 |
| Titled People Quiz #3 | 0 | - | 4.34 | 43,120 |
| Job Titles Quiz #1 | 0 | - | 4.22 | 75,931 |
| U.S. Baby Boy Names by Decade | 0 | - | 4.55 | 487,937 |
| U.S. Baby Girl Names by Decade | 0 | - | 4.42 | 711,272 |
| Time Magazine Person of the Year | 0 | - | 4.53 | 73,853 |
| Countries That Were Invaded | 0 | - | 4.55 | 97,217 |
| Female Historical Figures | 0 | - | 4.27 | 33,200 |
