| Axis Occupied Countries of WWII | 0 | - | 4.99 | 228,727 |
| Countries in World War I | 0 | - | 4.88 | 227,848 |
| The Dictator Files: Adolf Hitler | 0 | - | 4.79 | 77,789 |
| Countries in World War II | 0 | - | 4.54 | 911,018 |
| WWII for Dummies | 0 | - | 4.79 | 104,739 |
| World Leaders of the World Wars | 0 | - | 4.35 | 37,813 |
| Important Cities in WWII | 0 | - | 4.42 | 93,367 |
| WWII Geography | 0 | - | 4.81 | 120,136 |
| WWII Decoder | 0 | - | 4.41 | 53,483 |
| WWII Figures by Picture | 0 | - | 4.89 | 65,186 |
| WWII First Names | 0 | - | 4.44 | 41,749 |
| Military History Vocabulary | 0 | - | 4.91 | 67,046 |
| WWII A-Z #1 | 0 | - | 4.78 | 102,863 |
| WWII A-Z #2 | 0 | - | 4.44 | 54,602 |
| Name a Valid Answer - World War II | 0 | - | 4.53 | 55,308 |
| Name the English Monarchs | 0 | - | 4.91 | 501,614 |
| Cities Bombed During WWII | 0 | - | 4.08 | 30,102 |
| Countries by Percent WWII Deaths | 0 | - | 4.07 | 29,967 |
| WWI... or WWII? | 0 | - | 4.85 | 141,923 |
| Countries with the Most Military Troops | 0 | - | 4.95 | 287,502 |
| Countries with Nuclear Weapons | 0 | - | 4.86 | 271,968 |
| Countries with NO Military | 0 | - | 4.97 | 61,980 |
| Battle to Country | 0 | - | 4.91 | 53,165 |
| Countries with the Most Tanks | 0 | - | 4.91 | 107,152 |
| Normandy D-Day Beaches | 0 | - | 4.83 | 40,373 |
| Territory Changes in World War I | 0 | - | 4.87 | 46,668 |
| The Trojan War | 0 | - | 4.83 | 39,655 |
| Greek Mythology General Knowledge #1 | 0 | - | 4.85 | 111,562 |
| WWII Movies by Plot | 0 | - | 4.21 | 27,063 |
| Countries That Were Invaded | 0 | - | 4.55 | 97,329 |
| Deadliest U.S. Wars | 0 | - | 4.89 | 190,547 |
| Ancient Roman Trivia #1 | 0 | - | 4.85 | 84,428 |
| Roman Emperors | 0 | - | 4.95 | 119,672 |
| Letters of the Greek Alphabet | 0 | - | 4.97 | 646,222 |
| Name that Greek Letter | 0 | - | 4.93 | 323,120 |
| The Reign of Queen Elizabeth I | 0 | - | 4.53 | 31,746 |
| British History A-Z #1 | 0 | - | 4.45 | 46,408 |
| Houses of British Monarchs | 0 | - | 4.53 | 65,587 |
| G7 Leaders Since 2003 | 0 | - | 4.48 | 46,400 |
| 101 Figures from Greek Mythology | 0 | - | 4.99 | 125,574 |
| Historical Leaders by Date #1 | 0 | - | 4.48 | 31,372 |
| Historical Leaders by Date #2 | 0 | - | 4.55 | 30,200 |
| Historical Rulers #2 | 0 | - | 4.26 | 47,402 |
| Historical Rulers #1 | 0 | - | 4.35 | 118,799 |
| "Second Best" History Edition | 0 | - | 4.94 | 62,799 |
| Words for Leaders | 0 | - | 4.77 | 256,868 |
| World Leaders Quiz #1 | 0 | - | 4.11 | 109,948 |
| World Leaders of the Cold War | 0 | - | 4.27 | 25,251 |
| Famous Dictators #1 | 0 | - | 4.69 | 199,515 |
| Communist Countries in History | 0 | - | 4.63 | 494,993 |
| Famous Battles Quiz | 0 | - | 4.21 | 48,960 |
| Name the War | 0 | - | 4.37 | 201,474 |
| Famous U.S. Generals | 0 | - | 4.27 | 38,521 |
| Names for Warriors | 0 | - | 4.40 | 36,904 |
| Famous Generals - Non U.S. | 0 | - | 4.59 | 15,124 |
| English Royal Consorts | 0 | - | 4.37 | 37,324 |
| The Reign of Queen Elizabeth II | 0 | - | 4.36 | 35,811 |
| German History A-Z | 0 | - | 4.49 | 24,577 |
| Countries with U.S. Troops | 0 | - | 4.38 | 132,007 |
| Countries With the Largest Air Forces | 0 | - | 4.47 | 51,416 |
| Major non-NATO U.S. Allies | 0 | - | 4.52 | 52,088 |
| Metals of Antiquity | 0 | - | 4.95 | 93,329 |
| Former Countries by Territory Map | 0 | - | 4.96 | 102,576 |
| Empires by Maps | 0 | - | 4.98 | 120,015 |
| Popular Royal Names | 0 | - | 4.27 | 124,853 |
| History of The Netherlands | 0 | - | 4.46 | 17,410 |
| Historic Journeys on a World Map | 0 | - | 4.99 | 46,597 |
| History: What Came First? #1 | 0 | - | 4.87 | 105,092 |
| Famous Dictators #2 | 0 | - | 4.31 | 87,410 |
| Mythical Creatures Quiz #1 | 0 | - | 4.92 | 706,724 |
| First Names of Painters | 0 | - | 4.43 | 59,810 |
| Ultimate 20th Century History Quiz | 0 | - | 4.86 | 53,617 |
| Notable People of WWII | 0 | - | 4.53 | 85,850 |
| WWII Trivia #2 | 0 | - | 4.52 | 103,872 |
| World War I Quiz | 0 | - | 4.78 | 101,151 |
| WWI A-Z | 0 | - | 4.50 | 38,276 |
| Countries Invaded by the USSR | 0 | - | 4.29 | 93,935 |
| The 7 Wonders of the Ancient World | 0 | - | 4.85 | 82,332 |
| Countries that Have Won the Most Battles | 0 | - | 4.02 | 39,529 |
| Years in History #1 - Multiple Choice | 0 | - | 4.85 | 70,201 |
| The Reign of Henry VIII | 0 | - | 4.25 | 27,721 |
| British Royal Titles | 0 | - | 4.18 | 19,939 |
| Elizabeth I... or Elizabeth II? | 0 | - | 4.30 | 24,488 |
| The Reign of Queen Victoria | 0 | - | 4.33 | 23,423 |
| French History A-Z | 0 | - | 4.23 | 24,563 |
| Top 10 Oldest African Countries | 0 | - | 4.88 | 27,891 |
| Former Flags | 0 | - | 4.97 | 107,498 |
| Ancient Greece A-Z | 0 | - | 4.60 | 23,119 |
| States of the German Confederation in 1848 | 0 | - | 4.89 | 31,888 |
| World Leaders Quiz #2 | 0 | - | 4.00 | 35,816 |
| UN Secretaries-General | 0 | - | 4.40 | 7,787 |
| Benevolent Dictators and Enlightened Despots | 0 | - | 4.01 | 19,601 |
| Greek Mythology General Knowledge #2 | 0 | - | 4.59 | 73,492 |
| Former Capitals | 0 | - | 4.88 | 71,382 |
| WWII Trivia #1 | 0 | - | 4.36 | 177,467 |
| World War II Multiple Choice | 0 | - | 4.38 | 103,662 |
| Cold War Decoder | 0 | - | 4.83 | 52,262 |
| Name a Valid Year in History | 0 | - | 4.93 | 67,053 |
| People Who Died in Battle | 0 | - | 4.35 | 22,309 |
| The American Civil War | 0 | - | 4.62 | 52,377 |
| Ancient Roman Trivia #2 | 0 | - | 4.57 | 38,699 |
| Geography of the Roman Empire | 0 | - | 4.56 | 51,864 |
| Roman Names for Places | 0 | - | 4.62 | 58,188 |
| Ancient Greece - Multiple Choice | 0 | - | 4.54 | 41,611 |
| The Reign of Napoleon | 0 | - | 4.54 | 38,908 |
| British History Multiple Choice #1 | 0 | - | 4.46 | 55,108 |
| British History Multiple Choice #2 | 0 | - | 4.42 | 37,926 |
| All Modern-Day Countries Ever Controlled by Turkic People | 0 | - | 4.94 | 40,953 |
| European History for Dummies | 0 | - | 4.83 | 89,769 |
| English First Names of the Middle Ages | 0 | - | 4.47 | 60,594 |
| British History Quiz for Dummies | 0 | - | 4.70 | 78,484 |
| Top Arms Exporting Countries | 0 | - | 4.96 | 90,871 |
| Countries with the Most Elite Universities | 0 | - | 4.94 | 148,021 |
| Coldest World Capitals | 0 | - | 4.95 | 133,468 |
| World Currency Quiz | 0 | - | 4.91 | 302,013 |
| Countries by Number of Books Published | 0 | - | 4.95 | 72,417 |
| Countries with the Most Billionaires | 0 | - | 4.90 | 334,840 |
| Countries with the Most Millionaires | 0 | - | 4.86 | 123,213 |
| Biggest Export Partners For Every Country | 0 | - | 4.98 | 50,372 |
| Top Oil Reserve Countries | 0 | - | 4.93 | 74,668 |
| Cities with the Biggest Economies | 0 | - | 4.90 | 130,709 |
| NATO Countries | 0 | - | 4.98 | 279,370 |
| EU Countries Quiz | 0 | - | 4.99 | 272,959 |
| Top Five Countries by Religion | 0 | - | 4.93 | 170,797 |
| 7 Deadly Sins | 0 | - | 4.88 | 399,224 |
| Countries with the Most Christians | 0 | - | 4.92 | 142,818 |
| Least Christian Countries with Exceptions | 0 | - | 4.90 | 87,911 |
| Books of the Protestant Bible | 0 | - | 4.89 | 209,466 |
| Majority Muslim Countries | 0 | - | 4.98 | 373,270 |
| Buddhist Countries | 0 | - | 4.96 | 143,952 |
| Planets of the Solar System Quiz | 0 | - | 4.93 | 1,095,967 |
| Category Elimination - Countries #1 | 0 | - | 4.99 | 319,881 |
| Name a Valid Answer - British History | 0 | - | 4.57 | 15,136 |
| Influential Women in History | 0 | - | 4.42 | 35,512 |
| Cradles of Civilization | 0 | - | 4.46 | 39,567 |
| Spanish History A-Z | 0 | - | 4.37 | 19,270 |
| Italian History A-Z | 0 | - | 4.21 | 17,677 |
| Years in History by Picture | 0 | - | 4.44 | 35,445 |
| Russian History A-Z | 0 | - | 4.38 | 31,604 |
| Historical Events - AD or BC? | 0 | - | 4.70 | 57,530 |
| Materials From History #1 | 0 | - | 4.56 | 51,486 |
| Historical Countries by Ruler | 0 | - | 4.48 | 48,545 |
| Five Most Guessed World Leaders by Country | 0 | - | 4.20 | 48,669 |
| Prime Ministers of the UK | 0 | - | 4.95 | 437,949 |
| Biggest US Cities by Decade | 0 | - | 4.95 | 167,909 |
| 20th Century Dates Quiz | 0 | - | 4.56 | 39,386 |
| Events in History #2 | 0 | - | 4.49 | 71,650 |
| Events in History #4 | 0 | - | 4.44 | 44,265 |
| Biggest Nations and Empires Ever | 0 | - | 4.52 | 145,753 |
| Famous Explorers | 0 | - | 4.58 | 36,125 |
| Famous Empires by Description | 0 | - | 4.73 | 118,337 |
| Answers by Time Period | 0 | - | 4.64 | 55,522 |
| Political Quotes | 0 | - | 4.17 | 19,873 |
| This Day in History - July | 0 | - | 4.49 | 36,435 |
| This Day in History - August | 0 | - | 4.42 | 43,340 |
| This Day in History - September | 0 | - | 4.55 | 57,406 |
| This Day in History - October | 0 | - | 4.49 | 37,607 |
| This Day in History - January | 0 | - | 4.50 | 46,683 |
| This Day in History - March | 0 | - | 4.45 | 43,641 |
| Ancient Civilizations | 0 | - | 4.64 | 37,921 |
| The Life of Julius Caesar | 0 | - | 4.39 | 39,058 |
| Seven Hills of Rome | 0 | - | 4.70 | 9,167 |
| The Life of Alexander the Great | 0 | - | 4.51 | 18,482 |
| U.S. Five-Star Generals and Admirals | 0 | - | 4.33 | 8,327 |
| Military History A-Z | 0 | - | 4.20 | 21,140 |
| The Places They Went #1 | 0 | - | 4.74 | 33,517 |
| The Life of King David | 0 | - | 4.37 | 14,114 |
| Famous Inventors | 0 | - | 4.44 | 43,525 |
| Modern Day Countries of the Kushan Empire on a Map | 0 | - | 4.89 | 24,823 |
| Animals in British History | 0 | - | 4.44 | 25,979 |
| Kings of France Quiz | 0 | - | 4.20 | 32,689 |
| 40 Historical People that Everyone Should Know | 0 | - | 4.09 | 1,013,235 |
| Name that Historical Figure #1 | 0 | - | 4.63 | 337,137 |
| Branches of the U.S. Military | 0 | - | 4.39 | 24,333 |
| World Capitals in the Answer | 0 | - | 4.94 | 76,896 |
| Star Wars Quotes | 0 | - | 4.85 | 183,554 |
| Monarchies of Europe | 0 | - | 4.90 | 97,975 |
| Monarchies of Asia | 0 | - | 4.97 | 70,990 |
| Top 10 Coldest European Countries | 0 | - | 4.94 | 192,937 |
| Top 10 Hottest European Countries | 0 | - | 4.88 | 126,813 |
| Top 10 Coldest Asian Countries | 0 | - | 4.95 | 122,852 |
| Capital Cities with the Least Precipitation | 0 | - | 4.89 | 29,154 |
| Name a Disney/Pixar Movie A-Z | 0 | - | 4.84 | 51,686 |
| Five Biggest Economies by Continent | 0 | - | 4.98 | 194,934 |
| Countries with the Most Exports | 0 | - | 4.96 | 155,123 |
| Top Crude Oil Producing Countries | 0 | - | 4.89 | 189,439 |
| Countries by Oil Consumption | 0 | - | 4.96 | 120,294 |
| Top 10 Richest Countries in the Americas | 0 | - | 4.93 | 83,528 |
| Richest Island Countries | 0 | - | 4.84 | 100,314 |
| Largest Economies in 2050 | 0 | - | 4.90 | 111,287 |
| Top 10 Biggest Economies in the Americas | 0 | - | 4.94 | 91,965 |
| Capitals of Countries with the Biggest Economies | 0 | - | 4.93 | 95,078 |
| Richest Countries A-Z | 0 | - | 4.91 | 102,774 |
| Large Countries with Small Economies | 0 | - | 4.95 | 80,776 |
| Richest Countries Bordering Each Other | 0 | - | 4.99 | 153,973 |
| Rich Countries Bordering Poor Countries | 0 | - | 4.89 | 99,943 |
| Richest Countries by Per-Capita GDP | 0 | - | 4.96 | 270,446 |
| Countries With Highest GDP as a Percent of Continent | 0 | - | 4.96 | 104,064 |
| Countries with the Highest GDP per Square Kilometer | 0 | - | 4.89 | 84,377 |
| Bordering Countries with the Largest GDPs | 0 | - | 4.97 | 76,346 |
