| Axis Occupied Countries of WWII | 0 | - | 4.99 | 227,559 |
| Countries in World War I | 0 | - | 4.88 | 226,746 |
| The Dictator Files: Adolf Hitler | 0 | - | 4.79 | 77,395 |
| Countries in World War II | 0 | - | 4.54 | 905,628 |
| WWII for Dummies | 0 | - | 4.80 | 103,963 |
| World Leaders of the World Wars | 0 | - | 4.35 | 37,670 |
| Important Cities in WWII | 0 | - | 4.42 | 92,936 |
| WWII Geography | 0 | - | 4.81 | 119,439 |
| WWII Decoder | 0 | - | 4.41 | 53,082 |
| WWII Figures by Picture | 0 | - | 4.85 | 50,612 |
| WWII First Names | 0 | - | 4.44 | 41,595 |
| Military History Vocabulary | 0 | - | 4.91 | 66,709 |
| WWII A-Z #1 | 0 | - | 4.80 | 102,455 |
| WWII A-Z #2 | 0 | - | 4.44 | 54,368 |
| Name a Valid Answer - World War II | 0 | - | 4.53 | 54,799 |
| Name the English Monarchs | 0 | - | 4.92 | 498,569 |
| Cities Bombed During WWII | 0 | - | 4.08 | 29,930 |
| Countries by Percent WWII Deaths | 0 | - | 4.07 | 29,779 |
| WWI... or WWII? | 0 | - | 4.85 | 140,822 |
| Countries with the Most Military Troops | 0 | - | 4.95 | 285,313 |
| Countries with Nuclear Weapons | 0 | - | 4.86 | 268,858 |
| Countries with NO Military | 0 | - | 4.97 | 61,262 |
| Battle to Country | 0 | - | 4.91 | 52,605 |
| Countries with the Most Tanks | 0 | - | 4.91 | 106,400 |
| Normandy D-Day Beaches | 0 | - | 4.83 | 40,144 |
| Territory Changes in World War I | 0 | - | 4.86 | 46,271 |
| The Trojan War | 0 | - | 4.83 | 39,470 |
| Greek Mythology General Knowledge #1 | 0 | - | 4.85 | 110,725 |
| WWII Movies by Plot | 0 | - | 4.21 | 26,979 |
| Countries That Were Invaded | 0 | - | 4.54 | 96,969 |
| Deadliest U.S. Wars | 0 | - | 4.89 | 189,405 |
| Ancient Roman Trivia #1 | 0 | - | 4.85 | 84,118 |
| Roman Emperors | 0 | - | 4.95 | 118,630 |
| Letters of the Greek Alphabet | 0 | - | 4.97 | 642,722 |
| Name that Greek Letter | 0 | - | 4.94 | 321,887 |
| The Reign of Queen Elizabeth I | 0 | - | 4.53 | 31,634 |
| British History A-Z #1 | 0 | - | 4.45 | 46,146 |
| Houses of British Monarchs | 0 | - | 4.53 | 65,351 |
| G7 Leaders Since 2003 | 0 | - | 4.48 | 46,151 |
| 101 Figures from Greek Mythology | 0 | - | 4.99 | 124,526 |
| Historical Leaders by Date #1 | 0 | - | 4.48 | 31,241 |
| Historical Leaders by Date #2 | 0 | - | 4.55 | 30,081 |
| Historical Rulers #2 | 0 | - | 4.26 | 47,240 |
| Historical Rulers #1 | 0 | - | 4.35 | 118,529 |
| "Second Best" History Edition | 0 | - | 4.93 | 62,023 |
| Words for Leaders | 0 | - | 4.77 | 255,400 |
| World Leaders Quiz #1 | 0 | - | 4.11 | 109,700 |
| World Leaders of the Cold War | 0 | - | 4.27 | 25,145 |
| Famous Dictators #1 | 0 | - | 4.69 | 198,907 |
| Communist Countries in History | 0 | - | 4.63 | 492,903 |
| Famous Battles Quiz | 0 | - | 4.21 | 48,831 |
| Name the War | 0 | - | 4.37 | 200,877 |
| Famous U.S. Generals | 0 | - | 4.27 | 38,418 |
| Names for Warriors | 0 | - | 4.40 | 36,803 |
| Famous Generals - Non U.S. | 0 | - | 4.58 | 15,021 |
| English Royal Consorts | 0 | - | 4.37 | 37,211 |
| The Reign of Queen Elizabeth II | 0 | - | 4.36 | 35,703 |
| German History A-Z | 0 | - | 4.49 | 24,431 |
| Countries with U.S. Troops | 0 | - | 4.38 | 131,710 |
| Countries With the Largest Air Forces | 0 | - | 4.47 | 51,260 |
| Major non-NATO U.S. Allies | 0 | - | 4.52 | 51,803 |
| Metals of Antiquity | 0 | - | 4.94 | 92,983 |
| Former Countries by Territory Map | 0 | - | 4.96 | 101,746 |
| Empires by Maps | 0 | - | 4.98 | 118,741 |
| Popular Royal Names | 0 | - | 4.27 | 124,534 |
| History of The Netherlands | 0 | - | 4.46 | 17,331 |
| Historic Journeys on a World Map | 0 | - | 4.99 | 46,241 |
| History: What Came First? #1 | 0 | - | 4.87 | 104,286 |
| Famous Dictators #2 | 0 | - | 4.31 | 87,153 |
| Mythical Creatures Quiz #1 | 0 | - | 4.92 | 704,744 |
| First Names of Painters | 0 | - | 4.43 | 59,628 |
| Ultimate 20th Century History Quiz | 0 | - | 4.86 | 53,308 |
| Notable People of WWII | 0 | - | 4.53 | 85,352 |
| WWII Trivia #2 | 0 | - | 4.52 | 103,477 |
| World War I Quiz | 0 | - | 4.78 | 100,335 |
| WWI A-Z | 0 | - | 4.50 | 38,050 |
| Countries Invaded by the USSR | 0 | - | 4.29 | 93,609 |
| The 7 Wonders of the Ancient World | 0 | - | 4.85 | 82,134 |
| Countries that Have Won the Most Battles | 0 | - | 4.02 | 39,384 |
| Years in History #1 - Multiple Choice | 0 | - | 4.85 | 69,708 |
| The Reign of Henry VIII | 0 | - | 4.25 | 27,632 |
| British Royal Titles | 0 | - | 4.18 | 19,881 |
| Elizabeth I... or Elizabeth II? | 0 | - | 4.30 | 24,436 |
| The Reign of Queen Victoria | 0 | - | 4.33 | 23,358 |
| French History A-Z | 0 | - | 4.22 | 23,756 |
| Top 10 Oldest African Countries | 0 | - | 4.88 | 27,501 |
| Former Flags | 0 | - | 4.97 | 106,841 |
| Ancient Greece A-Z | 0 | - | 4.60 | 23,012 |
| World Leaders Quiz #2 | 0 | - | 4.00 | 35,677 |
| UN Secretaries-General | 0 | - | 4.40 | 7,769 |
| Benevolent Dictators and Enlightened Despots | 0 | - | 4.01 | 19,555 |
| Greek Mythology General Knowledge #2 | 0 | - | 4.59 | 72,988 |
| Former Capitals | 0 | - | 4.88 | 71,184 |
| WWII Trivia #1 | 0 | - | 4.36 | 176,734 |
| World War II Multiple Choice | 0 | - | 4.38 | 103,343 |
| Cold War Decoder | 0 | - | 4.83 | 51,988 |
| Name a Valid Year in History | 0 | - | 4.93 | 66,502 |
| People Who Died in Battle | 0 | - | 4.35 | 22,273 |
| The American Civil War | 0 | - | 4.62 | 52,186 |
| Ancient Roman Trivia #2 | 0 | - | 4.57 | 38,566 |
| Geography of the Roman Empire | 0 | - | 4.56 | 51,719 |
| Roman Names for Places | 0 | - | 4.62 | 57,923 |
| Ancient Greece - Multiple Choice | 0 | - | 4.54 | 41,472 |
| The Reign of Napoleon | 0 | - | 4.54 | 38,748 |
| British History Multiple Choice #1 | 0 | - | 4.46 | 54,983 |
| British History Multiple Choice #2 | 0 | - | 4.42 | 37,853 |
| All Modern-Day Countries Ever Controlled by Turkic People | 0 | - | 4.95 | 40,735 |
| European History for Dummies | 0 | - | 4.83 | 89,393 |
| English First Names of the Middle Ages | 0 | - | 4.47 | 60,376 |
| British History Quiz for Dummies | 0 | - | 4.70 | 78,192 |
| Top Arms Exporting Countries | 0 | - | 4.96 | 85,158 |
| Countries with the Most Elite Universities | 0 | - | 4.94 | 146,939 |
| Coldest World Capitals | 0 | - | 4.95 | 133,091 |
| World Currency Quiz | 0 | - | 4.92 | 299,021 |
| Countries by Number of Books Published | 0 | - | 4.95 | 71,976 |
| Countries with the Most Billionaires | 0 | - | 4.90 | 333,140 |
| Countries with the Most Millionaires | 0 | - | 4.86 | 122,259 |
| Biggest Export Partners For Every Country | 0 | - | 4.98 | 49,813 |
| Top Oil Reserve Countries | 0 | - | 4.93 | 74,226 |
| Cities with the Biggest Economies | 0 | - | 4.91 | 129,802 |
| NATO Countries | 0 | - | 4.98 | 276,369 |
| EU Countries Quiz | 0 | - | 4.99 | 270,386 |
| Top Five Countries by Religion | 0 | - | 4.93 | 169,246 |
| 7 Deadly Sins | 0 | - | 4.88 | 395,642 |
| Countries with the Most Christians | 0 | - | 4.92 | 141,632 |
| Least Christian Countries with Exceptions | 0 | - | 4.90 | 87,035 |
| Books of the Protestant Bible | 0 | - | 4.89 | 207,619 |
| Majority Muslim Countries | 0 | - | 4.98 | 368,945 |
| Buddhist Countries | 0 | - | 4.96 | 143,069 |
| Planets of the Solar System Quiz | 0 | - | 4.93 | 1,091,585 |
| Category Elimination - Countries #1 | 0 | - | 4.99 | 317,395 |
| Name a Valid Answer - British History | 0 | - | 4.57 | 15,084 |
| Influential Women in History | 0 | - | 4.42 | 35,164 |
| Cradles of Civilization | 0 | - | 4.46 | 39,229 |
| Spanish History A-Z | 0 | - | 4.37 | 19,175 |
| Italian History A-Z | 0 | - | 4.21 | 17,564 |
| Years in History by Picture | 0 | - | 4.44 | 35,156 |
| Russian History A-Z | 0 | - | 4.38 | 31,137 |
| Historical Events - AD or BC? | 0 | - | 4.70 | 57,231 |
| Materials From History #1 | 0 | - | 4.56 | 51,112 |
| States of the German Confederation in 1848 | 0 | - | 4.89 | 31,594 |
| Historical Countries by Ruler | 0 | - | 4.48 | 48,230 |
| Five Most Guessed World Leaders by Country | 0 | - | 4.19 | 47,892 |
| Prime Ministers of the UK | 0 | - | 4.96 | 435,129 |
| Biggest US Cities by Decade | 0 | - | 4.95 | 167,164 |
| 20th Century Dates Quiz | 0 | - | 4.56 | 39,330 |
| Events in History #2 | 0 | - | 4.49 | 71,462 |
| Events in History #4 | 0 | - | 4.44 | 44,134 |
| Biggest Nations and Empires Ever | 0 | - | 4.46 | 145,319 |
| Famous Explorers | 0 | - | 4.58 | 35,998 |
| Famous Empires by Description | 0 | - | 4.73 | 118,002 |
| Answers by Time Period | 0 | - | 4.63 | 55,314 |
| Political Quotes | 0 | - | 4.17 | 19,816 |
| This Day in History - July | 0 | - | 4.49 | 36,378 |
| This Day in History - August | 0 | - | 4.42 | 43,264 |
| This Day in History - September | 0 | - | 4.55 | 57,286 |
| This Day in History - October | 0 | - | 4.49 | 37,558 |
| This Day in History - January | 0 | - | 4.50 | 46,589 |
| This Day in History - March | 0 | - | 4.45 | 43,553 |
| Ancient Civilizations | 0 | - | 4.63 | 37,784 |
| The Life of Julius Caesar | 0 | - | 4.39 | 38,975 |
| Seven Hills of Rome | 0 | - | 4.70 | 9,119 |
| The Life of Alexander the Great | 0 | - | 4.49 | 18,432 |
| U.S. Five-Star Generals and Admirals | 0 | - | 4.33 | 8,307 |
| Military History A-Z | 0 | - | 4.20 | 21,053 |
| The Places They Went #1 | 0 | - | 4.74 | 33,454 |
| The Life of King David | 0 | - | 4.37 | 14,067 |
| Famous Inventors | 0 | - | 4.43 | 43,467 |
| Modern Day Countries of the Kushan Empire on a Map | 0 | - | 4.89 | 24,532 |
| Animals in British History | 0 | - | 4.44 | 25,888 |
| Kings of France Quiz | 0 | - | 4.20 | 32,579 |
| 40 Historical People that Everyone Should Know | 0 | - | 4.09 | 1,011,307 |
| Name that Historical Figure #1 | 0 | - | 4.63 | 335,756 |
| Branches of the U.S. Military | 0 | - | 4.40 | 24,182 |
| World Capitals in the Answer | 0 | - | 4.94 | 76,376 |
| Star Wars Quotes | 0 | - | 4.83 | 173,605 |
| Monarchies of Europe | 0 | - | 4.90 | 97,423 |
| Monarchies of Asia | 0 | - | 4.97 | 70,658 |
| Top 10 Coldest European Countries | 0 | - | 4.94 | 192,337 |
| Top 10 Hottest European Countries | 0 | - | 4.89 | 126,203 |
| Top 10 Coldest Asian Countries | 0 | - | 4.95 | 122,534 |
| Capital Cities with the Least Precipitation | 0 | - | 4.89 | 29,051 |
| Name a Disney/Pixar Movie A-Z | 0 | - | 4.89 | 50,687 |
| Five Biggest Economies by Continent | 0 | - | 4.98 | 194,077 |
| Countries with the Most Exports | 0 | - | 4.96 | 154,297 |
| Top Crude Oil Producing Countries | 0 | - | 4.89 | 188,609 |
| Countries by Oil Consumption | 0 | - | 4.96 | 119,600 |
| Top 10 Richest Countries in the Americas | 0 | - | 4.90 | 76,159 |
| Richest Island Countries | 0 | - | 4.84 | 99,628 |
| Largest Economies in 2050 | 0 | - | 4.90 | 110,735 |
| Top 10 Biggest Economies in the Americas | 0 | - | 4.93 | 91,162 |
| Capitals of Countries with the Biggest Economies | 0 | - | 4.93 | 94,765 |
| Richest Countries A-Z | 0 | - | 4.92 | 102,009 |
| Large Countries with Small Economies | 0 | - | 4.94 | 80,398 |
| Richest Countries Bordering Each Other | 0 | - | 4.99 | 153,369 |
| Rich Countries Bordering Poor Countries | 0 | - | 4.89 | 99,524 |
| Richest Countries by Per-Capita GDP | 0 | - | 4.96 | 262,465 |
| Countries With Highest GDP as a Percent of Continent | 0 | - | 4.95 | 103,061 |
| Countries with the Highest GDP per Square Kilometer | 0 | - | 4.90 | 83,799 |
| Bordering Countries with the Largest GDPs | 0 | - | 4.97 | 76,120 |
