| G7 Leaders Since 2003 | 0 | - | 4.48 | 46,097 |
| Famous Dictators #1 | 0 | - | 4.69 | 198,668 |
| Historical Leaders by Date #1 | 0 | - | 4.48 | 31,209 |
| Historical Leaders by Date #2 | 0 | - | 4.55 | 30,039 |
| Historical Rulers #2 | 0 | - | 4.26 | 47,179 |
| Historical Rulers #1 | 0 | - | 4.35 | 118,442 |
| Words for Leaders | 0 | - | 4.77 | 254,969 |
| World Leaders Quiz #1 | 0 | - | 4.11 | 109,611 |
| Famous Dictators #2 | 0 | - | 4.31 | 87,063 |
| Prime Ministers of the UK | 0 | - | 4.96 | 434,280 |
| World Leaders Quiz #2 | 0 | - | 4.00 | 35,638 |
| UN Secretaries-General | 0 | - | 4.40 | 7,756 |
| Benevolent Dictators and Enlightened Despots | 0 | - | 4.01 | 19,535 |
| NATO Countries | 0 | - | 4.98 | 275,323 |
| EU Countries Quiz | 0 | - | 4.99 | 269,602 |
| The Dictator Files: Adolf Hitler | 0 | - | 4.79 | 77,268 |
| Political Figures by Last Name #1 | 0 | - | 4.55 | 67,367 |
| World Leaders of the World Wars | 0 | - | 4.35 | 37,640 |
| World Leaders of the Cold War | 0 | - | 4.27 | 25,109 |
| Five Most Guessed World Leaders by Country | 0 | - | 4.18 | 47,151 |
| Military History Vocabulary | 0 | - | 4.91 | 66,606 |
| U.S. Citizenship Test Questions | 0 | - | 4.83 | 238,227 |
| World Leaders by Picture | 0 | - | 4.36 | 263,245 |
| Canadian Prime Ministers | 0 | - | 4.63 | 56,991 |
| Prime Ministers of Australia | 0 | - | 4.50 | 31,657 |
| Name the English Monarchs | 0 | - | 4.92 | 497,558 |
| U.S. Cabinet Departments | 0 | - | 4.86 | 72,496 |
| Iceland True or False? | 0 | - | 4.93 | 36,947 |
| "Second Best" History Edition | 0 | - | 4.94 | 61,661 |
| Dictators by Picture | 0 | - | 4.18 | 48,842 |
| WWII Geography | 0 | - | 4.81 | 119,284 |
| WWII Figures by Picture | 0 | - | 4.85 | 50,448 |
| OPEC Countries | 0 | - | 4.74 | 84,792 |
| Political Quotes | 0 | - | 4.17 | 19,800 |
| Former Countries by Territory Map | 0 | - | 4.96 | 101,375 |
| Empires by Maps | 0 | - | 4.98 | 118,253 |
| Spouses of World Leaders | 0 | - | 4.18 | 12,283 |
| First Names of Recent World Leaders | 0 | - | 4.25 | 24,835 |
| The Dictator Files: Saddam Hussein | 0 | - | 4.48 | 15,747 |
| Name the Popes Quiz | 0 | - | 4.47 | 137,008 |
| Countries of the Popes | 0 | - | 4.79 | 127,112 |
| Ultimate 20th Century History Quiz | 0 | - | 4.86 | 53,165 |
| The 7 Wonders of the Ancient World | 0 | - | 4.85 | 82,052 |
| European Secessionist Movements on a Map | 0 | - | 4.53 | 34,723 |
| Metals of Antiquity | 0 | - | 4.94 | 92,838 |
| Popular Royal Names | 0 | - | 4.27 | 124,444 |
| Historic Journeys on a World Map | 0 | - | 4.99 | 46,110 |
| History: What Came First? #1 | 0 | - | 4.87 | 104,098 |
| Paramount Leaders of China | 0 | - | 4.36 | 10,991 |
| Mythical Creatures Quiz #1 | 0 | - | 4.92 | 704,081 |
| First Names of Painters | 0 | - | 4.43 | 59,582 |
| Years in History #1 - Multiple Choice | 0 | - | 4.85 | 69,623 |
| The Bible - Multiple Choice | 0 | - | 4.34 | 50,455 |
| Sweden True or False? | 0 | - | 4.56 | 40,048 |
| Top 10 Oldest African Countries | 0 | - | 4.88 | 27,408 |
| Influential Women in History | 0 | - | 4.42 | 34,913 |
| Cradles of Civilization | 0 | - | 4.46 | 38,975 |
| History of The Netherlands | 0 | - | 4.46 | 17,302 |
| Materials From History #1 | 0 | - | 4.56 | 50,532 |
| Historical Countries by Ruler | 0 | - | 4.48 | 47,999 |
| Political Figures by Last Name #2 | 0 | - | 3.88 | 16,578 |
| The Dictator Files: Chairman Mao | 0 | - | 4.28 | 20,567 |
| The Dictator Files: Benito Mussolini | 0 | - | 4.65 | 23,300 |
| The Dictator Files: Vladimir Lenin | 0 | - | 4.45 | 26,621 |
| WWII Decoder | 0 | - | 4.41 | 53,013 |
| Name a Valid Answer - World War II | 0 | - | 4.53 | 54,710 |
| Countries Invaded by the USSR | 0 | - | 4.29 | 93,499 |
| Biggest Nations and Empires Ever | 0 | - | 4.46 | 145,085 |
| Famous Explorers | 0 | - | 4.58 | 35,921 |
| Famous Empires by Description | 0 | - | 4.70 | 117,481 |
| Answers by Time Period | 0 | - | 4.63 | 55,235 |
| British History Multiple Choice #1 | 0 | - | 4.46 | 54,942 |
| British History Multiple Choice #2 | 0 | - | 4.42 | 37,818 |
| French History Multiple Choice | 0 | - | 4.55 | 32,860 |
| All Modern-Day Countries Ever Controlled by Turkic People | 0 | - | 4.95 | 40,662 |
| All Modern-Day Countries Ever Controlled by Arab People with a Map | 0 | - | 4.98 | 54,827 |
| Houses of British Monarchs | 0 | - | 4.53 | 65,262 |
| U.S. States by Governor | 0 | - | 4.43 | 17,977 |
| U.S. Political Parties in History | 0 | - | 4.44 | 27,563 |
| U.S. Government Agencies | 0 | - | 4.44 | 19,537 |
| Red State or Blue State Trait? | 0 | - | 4.42 | 54,906 |
| Countries with the Most Military Troops | 0 | - | 4.95 | 284,642 |
| Countries with Nuclear Weapons | 0 | - | 4.86 | 267,877 |
| Countries with NO Military | 0 | - | 4.97 | 61,105 |
| Countries with the Most Elite Universities | 0 | - | 4.94 | 146,637 |
| Countries by Number of Books Published | 0 | - | 4.95 | 71,864 |
| Top Five Countries by Religion | 0 | - | 4.93 | 168,883 |
| 7 Deadly Sins | 0 | - | 4.88 | 394,464 |
| Books of the Protestant Bible | 0 | - | 4.89 | 206,964 |
| Majority Muslim Countries | 0 | - | 4.98 | 368,153 |
| Astronomy True or False | 0 | - | 4.38 | 36,240 |
| Ireland True or False? | 0 | - | 4.57 | 49,350 |
| Peru True or False? | 0 | - | 4.58 | 15,184 |
| Former Flags | 0 | - | 4.97 | 106,567 |
| Years in History by Picture | 0 | - | 4.44 | 35,064 |
| Ancient Greece A-Z | 0 | - | 4.60 | 22,977 |
| Historical Events - AD or BC? | 0 | - | 4.70 | 57,158 |
| Materials From History #2 | 0 | - | 4.59 | 30,896 |
| States of the German Confederation in 1848 | 0 | - | 4.89 | 31,493 |
| The Dictator Files: Fidel Castro | 0 | - | 4.19 | 12,249 |
| Pope Facts | 0 | - | 4.39 | 31,020 |
| WWII First Names | 0 | - | 4.44 | 41,540 |
| WWII for Dummies | 0 | - | 4.80 | 103,736 |
| Cold War Decoder | 0 | - | 4.83 | 51,896 |
| 20th Century Dates Quiz | 0 | - | 4.56 | 39,302 |
| Events in History #2 | 0 | - | 4.49 | 71,392 |
| Events in History #4 | 0 | - | 4.44 | 44,079 |
| Name a Valid Year in History | 0 | - | 4.93 | 66,302 |
| Infamous Criminals - Mostly U.S. | 0 | - | 4.21 | 48,790 |
| Assassinations in History | 0 | - | 4.20 | 65,927 |
| Famous Seconds | 0 | - | 4.22 | 46,370 |
| Ages and Eras Quiz | 0 | - | 4.38 | 67,423 |
| Celebrity Knights of the United Kingdom | 0 | - | 4.23 | 39,378 |
| Titled People Quiz #1 | 0 | - | 4.10 | 45,591 |
| Titled People Quiz #3 | 0 | - | 4.34 | 43,013 |
| Job Titles Quiz #1 | 0 | - | 4.22 | 75,808 |
| Female Historical Figures | 0 | - | 4.31 | 33,080 |
| Historical Blunders | 0 | - | 4.33 | 91,640 |
| Territorial Accessions | 0 | - | 4.38 | 34,614 |
| People Known as "The Great" | 0 | - | 4.46 | 24,496 |
| This Day in History - July | 0 | - | 4.49 | 36,361 |
| This Day in History - August | 0 | - | 4.42 | 43,234 |
| This Day in History - September | 0 | - | 4.55 | 57,242 |
| This Day in History - October | 0 | - | 4.49 | 37,545 |
| This Day in History - January | 0 | - | 4.53 | 46,557 |
| This Day in History - March | 0 | - | 4.45 | 43,529 |
| Ancient Civilizations | 0 | - | 4.63 | 37,731 |
| Battle to Country | 0 | - | 4.91 | 52,464 |
| The Places They Went #1 | 0 | - | 4.74 | 33,437 |
| The Life of King David | 0 | - | 4.37 | 14,056 |
| Famous Inventors | 0 | - | 4.43 | 43,443 |
| Modern Day Countries of the Kushan Empire on a Map | 0 | - | 4.89 | 24,430 |
| All Modern-Day Countries Ever Controlled by the Seljuks | 0 | - | 4.92 | 28,255 |
| European History for Dummies | 0 | - | 4.82 | 89,253 |
| English Royal Consorts | 0 | - | 4.37 | 37,147 |
| The Reign of Queen Elizabeth I | 0 | - | 4.53 | 31,593 |
| British History A-Z #1 | 0 | - | 4.45 | 45,773 |
| Kings of France Quiz | 0 | - | 4.20 | 32,544 |
| 40 Historical People that Everyone Should Know | 0 | - | 4.09 | 1,010,198 |
| The U.S. Government - How Does it Work? | 0 | - | 4.34 | 42,147 |
| World Capitals in the Answer | 0 | - | 4.94 | 76,237 |
| Countries with the Most Tanks | 0 | - | 4.91 | 106,180 |
| Monarchies of Europe | 0 | - | 4.90 | 97,241 |
| Monarchies of Asia | 0 | - | 4.97 | 70,556 |
| Coldest World Capitals | 0 | - | 4.95 | 133,005 |
| Capital Cities with the Least Precipitation | 0 | - | 4.89 | 29,015 |
| World Currency Quiz | 0 | - | 4.92 | 298,013 |
| Countries with the Most Billionaires | 0 | - | 4.90 | 332,613 |
| Countries with the Most Millionaires | 0 | - | 4.86 | 121,935 |
| Five Biggest Economies by Continent | 0 | - | 4.98 | 193,796 |
| Countries with the Most Exports | 0 | - | 4.96 | 154,062 |
| Biggest Export Partners For Every Country | 0 | - | 4.98 | 49,667 |
| Top Crude Oil Producing Countries | 0 | - | 4.89 | 188,393 |
| Countries by Oil Consumption | 0 | - | 4.96 | 119,489 |
| Top Oil Reserve Countries | 0 | - | 4.93 | 74,064 |
| Richest Island Countries | 0 | - | 4.84 | 99,433 |
| Cities with the Biggest Economies | 0 | - | 4.91 | 129,562 |
| Largest Economies in 2050 | 0 | - | 4.90 | 110,579 |
| Capitals of Countries with the Biggest Economies | 0 | - | 4.93 | 94,666 |
| Richest Countries by Per-Capita GDP | 0 | - | 4.96 | 261,855 |
| Countries With Highest GDP as a Percent of Continent | 0 | - | 4.95 | 102,857 |
| Countries with the Highest GDP per Square Kilometer | 0 | - | 4.90 | 83,647 |
| Countries with the Most Christians | 0 | - | 4.92 | 141,316 |
| Five Countries with Most Christians by Continent | 0 | - | 4.99 | 110,516 |
| Least Christian Countries with Exceptions | 0 | - | 4.90 | 86,843 |
| Countries with the Most Catholics | 0 | - | 4.90 | 107,916 |
| Catholic Countries in Europe | 0 | - | 4.83 | 94,145 |
| Orthodox Countries | 0 | - | 4.91 | 130,293 |
| Countries with the Most Muslims | 0 | - | 4.95 | 159,196 |
| Buddhist Countries | 0 | - | 4.96 | 142,868 |
| The Sun Quiz | 0 | - | 4.93 | 34,057 |
| Planets of the Solar System Quiz | 0 | - | 4.93 | 1,090,092 |
| Name the Constellations - With a Map | 0 | - | 4.92 | 35,573 |
| Capital Cities by Cartoon Riddles | 0 | - | 4.98 | 86,595 |
| Divided World City Name Puzzle #1 | 0 | - | 4.88 | 48,063 |
| Divided World City Name Puzzle #2 | 0 | - | 4.83 | 36,446 |
| Countries that Start with A | 0 | - | 4.97 | 2,145,372 |
| Countries that Start with B | 0 | - | 4.95 | 2,278,595 |
| Countries that Start with C | 0 | - | 4.96 | 1,809,271 |
| Countries that Start with D | 0 | - | 4.96 | 700,825 |
| Countries that Start with E | 0 | - | 4.95 | 1,366,683 |
| Countries that Start with G | 0 | - | 4.97 | 1,491,906 |
| Countries that Start with H | 0 | - | 4.96 | 597,351 |
| Countries that Start with I | 0 | - | 4.92 | 1,279,563 |
| Countries that Start with J | 0 | - | 4.98 | 595,412 |
| Countries that Start with K | 0 | - | 4.96 | 808,866 |
| Countries that Start with L | 0 | - | 4.98 | 1,082,248 |
| Countries that Start with N | 0 | - | 4.93 | 1,109,104 |
| Countries that Start with P | 0 | - | 4.94 | 1,207,936 |
| Countries that Start with S | 0 | - | 4.98 | 1,743,632 |
| Countries that Start with T | 0 | - | 4.90 | 1,003,692 |
| Countries that Start with U | 0 | - | 4.97 | 899,544 |
| Countries that Start with V | 0 | - | 4.98 | 604,727 |
| Countries that Start with F | 0 | - | 4.83 | 611,702 |
| Countries that Start with M | 0 | - | 4.97 | 1,372,609 |
| Asian Geography By Letter - B | 0 | - | 4.85 | 65,946 |
| European Geography By Letter - P #1 | 0 | - | 4.81 | 96,283 |
| European Geography By Letter - B #2 | 0 | - | 4.83 | 76,151 |
| Capitals A-Z #1 | 0 | - | 4.86 | 51,060 |
| Marvel Cinematic Universe - All Movies | 0 | - | 4.89 | 332,214 |
