| Deadliest U.S. Wars | 0 | - | 4.89 | 190,181 |
| Battle to Country | 0 | - | 4.91 | 52,998 |
| U.S. Five-Star Generals and Admirals | 0 | - | 4.33 | 8,320 |
| Top 10 Coldest U.S. States | 0 | - | 4.94 | 124,310 |
| Top 10 Hottest U.S. States | 0 | - | 4.86 | 125,188 |
| Top 10 U.S. States with the Least Precipitation | 0 | - | 4.82 | 61,747 |
| Canadian Prime Ministers | 0 | - | 4.63 | 57,327 |
| Countries Italy Declared War On | 0 | - | 4.75 | 43,180 |
| US States Quiz | 0 | - | 5.00 | 16,796,536 |
| All 3,143 Counties of the United States on a Map | 0 | - | 4.97 | 330,253 |
| 100 Most Influential Figures in U.S. History | 0 | - | 4.20 | 44,911 |
| The American Civil War | 0 | - | 4.62 | 52,316 |
| Famous Canadians by Picture | 0 | - | 4.39 | 49,248 |
| Name the English Monarchs | 0 | - | 4.91 | 500,553 |
| 10 Longest Rivers in the United States | 0 | - | 4.85 | 39,019 |
| U.S. Cities with the Biggest Economies | 0 | - | 4.84 | 72,491 |
| Countries Closest to United States by Continent | 0 | - | 4.99 | 145,959 |
| U.S. Federal Agency Acronyms | 0 | - | 4.50 | 79,875 |
| Louisiana Purchase with a Map | 0 | - | 4.96 | 48,197 |
| US States with an Empty Map | 0 | - | 5.00 | 621,897 |
| U.S. States or European Countries by Area | 0 | - | 4.95 | 95,489 |
| U.S. States or European Countries by Population | 0 | - | 4.97 | 132,649 |
| The Reign of Napoleon | 0 | - | 4.54 | 38,850 |
| Axis Occupied Countries of WWII | 0 | - | 4.99 | 228,443 |
| Countries in World War I | 0 | - | 4.88 | 227,579 |
| Rivers of the United States | 0 | - | 4.93 | 65,910 |
| Countries Closest to Alaska | 0 | - | 4.93 | 123,911 |
| Countries Closest to Maine | 0 | - | 4.85 | 66,829 |
| Name a Valid U.S. State #1 | 0 | - | 4.93 | 208,065 |
| Great Plains States and Provinces on a Map | 0 | - | 4.95 | 49,083 |
| Top 10 Most Native American U.S. States | 0 | - | 4.87 | 91,638 |
| Countries that Have Won the Most Battles | 0 | - | 4.02 | 39,477 |
| Biggest Trading Partners - Colombia | 0 | - | 4.88 | 40,167 |
| 10 U.S. States With The Lowest Murder Rates | 0 | - | 4.51 | 41,794 |
| Biggest Trading Partners - United States | 0 | - | 4.63 | 106,528 |
| All U.S. Supreme Court Justices | 0 | - | 4.54 | 29,032 |
| All U.S. Supreme Court Justices Ever | 0 | - | 4.49 | 11,726 |
| U.S. History for Dummies | 0 | - | 4.47 | 82,810 |
| U.S. States that Border Canada | 0 | - | 4.91 | 183,909 |
| U.S. States by Coldest Recorded Temperature | 0 | - | 4.51 | 66,381 |
| 10 U.S. States With The Highest Murder Rates | 0 | - | 4.47 | 53,743 |
| U.S. State Superlatives #1 | 0 | - | 4.47 | 87,416 |
| U.S. State Superlatives #2 | 0 | - | 4.53 | 40,561 |
| Top 10 U.S. States With the Most Tornadoes | 0 | - | 4.53 | 64,629 |
| Top 10 Least Religious U.S. States | 0 | - | 4.51 | 34,207 |
| Top 10 U.S. States by Public Transit | 0 | - | 4.77 | 63,601 |
| Top 10 U.S. States with the Most Precipitation | 0 | - | 4.46 | 41,639 |
| U.S. States that Start with M - Shape Quiz | 0 | - | 4.94 | 57,923 |
| O Canada Lyrics | 0 | - | 4.47 | 50,896 |
| Canada Provinces and Territories | 0 | - | 5.00 | 340,308 |
| Canada Provinces Map Quiz | 0 | - | 4.99 | 638,289 |
| American Founding Fathers | 0 | - | 4.42 | 23,159 |
| People on Money - United States | 0 | - | 4.31 | 63,289 |
| U.S. History Groups of Two | 0 | - | 4.23 | 44,356 |
| Fifty US States in One Minute | 0 | - | 4.61 | 3,529,557 |
| Category Elimination - U.S. States #1 | 0 | - | 4.88 | 219,870 |
| Category Elimination - U.S. States #2 | 0 | - | 4.82 | 133,516 |
| U.S. States by Wikipedia Descriptions #1 | 0 | - | 4.57 | 39,284 |
| U.S. States by Wikipedia Descriptions #2 | 0 | - | 4.48 | 37,044 |
| Top 10 Richest U.S. States by Median Income | 0 | - | 4.47 | 118,734 |
| States of the German Confederation in 1848 | 0 | - | 4.90 | 31,804 |
| American History Quotes #1 | 0 | - | 4.37 | 95,896 |
| American History Quotes #2 | 0 | - | 4.38 | 41,336 |
| Last Names in U.S. History #1 | 0 | - | 4.25 | 36,188 |
| Catholic Countries in Europe | 0 | - | 4.83 | 94,674 |
| Monarchies of Europe | 0 | - | 4.90 | 97,772 |
| Countries of Europe in 1815 With a Map | 0 | - | 4.99 | 149,647 |
| Countries of Europe in 1848 | 0 | - | 4.99 | 75,951 |
| Every Country of Europe Since 1815 With a Map | 0 | - | 4.98 | 70,563 |
| Monarchies of Asia | 0 | - | 4.97 | 70,878 |
| Asian Country Superlatives | 0 | - | 4.83 | 80,691 |
| Countries in World War II | 0 | - | 4.54 | 909,216 |
| Countries of the Mongol Empire on a Map | 0 | - | 4.99 | 106,421 |
| Top 10 Richest Countries in Africa | 0 | - | 4.85 | 75,598 |
| Top 10 Biggest Economies in Africa | 0 | - | 4.99 | 119,852 |
| Category Elimination - African Geography #1 | 0 | - | 4.90 | 91,877 |
| Top 10 Richest Countries in the Americas | 0 | - | 4.93 | 82,426 |
| Top 10 Biggest Economies in the Americas | 0 | - | 4.93 | 91,537 |
| U.S. Geography by Letter - B | 0 | - | 4.53 | 69,010 |
| U.S. Geography by Letter - S | 0 | - | 4.55 | 52,491 |
| Mexico Country Quiz | 0 | - | 4.49 | 72,250 |
| Mexico Cities Map Quiz | 0 | - | 4.83 | 36,548 |
| Colombia Country Quiz | 0 | - | 4.90 | 40,565 |
| 15 Largest Cities in North America With a Map | 0 | - | 4.98 | 46,888 |
| 100 Biggest Cities in North America on a Map | 0 | - | 4.84 | 61,911 |
| Two Letter U.S. State Abbreviations | 0 | - | 4.19 | 745,541 |
| Biggest Cities in the U.S. - Extreme | 0 | - | 4.96 | 158,824 |
| Biggest Cities in Each U.S. State - Extreme | 0 | - | 4.93 | 79,086 |
| 10 Biggest Cities by U.S. State | 0 | - | 4.95 | 41,383 |
| 500 Biggest U.S. Urban Areas | 0 | - | 4.90 | 116,222 |
| Richest Metro Areas in the U.S. | 0 | - | 4.42 | 43,497 |
| U.S. Cabinet Departments | 0 | - | 4.86 | 72,727 |
| U.S. Political Figures by Picture #1 | 0 | - | 4.14 | 26,127 |
| U.S. Political Figures by Picture #2 | 0 | - | 4.10 | 15,496 |
| Female Political Figures by Picture - U.S. | 0 | - | 4.20 | 10,847 |
| U.S. Presidents Quiz | 0 | - | 5.00 | 3,679,014 |
| 10 Closest Megacities to New York City | 0 | - | 4.52 | 67,262 |
| U.S. States by First Two Letters in 30 Seconds | 0 | - | 4.69 | 1,386,716 |
| U.S. States by Hottest Recorded Temperature | 0 | - | 4.36 | 57,298 |
| US States by Borders in 30 Seconds | 0 | - | 4.67 | 2,673,733 |
| 10 U.S. States with the Highest Tax Burden | 0 | - | 4.26 | 38,140 |
| Top 10 U.S. States by Manufacturing Employment | 0 | - | 4.49 | 28,782 |
| Most-Visited Countries by Canadians | 0 | - | 4.82 | 39,212 |
| Countries Closest to Canada | 0 | - | 4.91 | 197,836 |
| U.S. States With No City Over 100,000 | 0 | - | 4.57 | 17,912 |
| Top 10 Coldest European Countries | 0 | - | 4.94 | 192,708 |
| Top 10 Hottest European Countries | 0 | - | 4.88 | 126,584 |
| Biggest Countries in Europe in 1700 | 0 | - | 4.73 | 58,327 |
| Top 10 Richest Countries in Europe | 0 | - | 4.90 | 148,897 |
| Top 10 Biggest Economies in Europe | 0 | - | 4.98 | 198,251 |
| Biggest Trading Partners - European Union | 0 | - | 4.91 | 72,470 |
| Category Elimination - European Geography #1 | 0 | - | 4.98 | 232,085 |
| Category Elimination - European Geography #2 | 0 | - | 4.99 | 166,271 |
| Category Elimination - European Countries #1 | 0 | - | 4.89 | 89,589 |
| Modern-Day Countries of the British Empire in 1921 | 0 | - | 4.99 | 116,982 |
| Asian Last Names in the United States | 0 | - | 4.43 | 46,656 |
| Top 10 Coldest Asian Countries | 0 | - | 4.95 | 122,723 |
| Top 10 Biggest Economies in Asia | 0 | - | 4.85 | 120,193 |
| Category Elimination - Asian Geography #1 | 0 | - | 4.85 | 109,439 |
| Category Elimination - Asian Geography #2 | 0 | - | 4.94 | 96,144 |
| The Vietnam War | 0 | - | 4.43 | 35,429 |
| WWII Geography | 0 | - | 4.81 | 119,975 |
| Hindu Countries | 0 | - | 4.86 | 49,888 |
| Countries Bordering Brazil | 0 | - | 4.96 | 131,346 |
| Countries That Visit Brazil The Most | 0 | - | 4.95 | 49,446 |
| Costa Rica Country Quiz | 0 | - | 4.75 | 32,073 |
| Cuba Country Quiz | 0 | - | 4.70 | 51,359 |
| Names of Generations | 0 | - | 4.11 | 39,853 |
| Arms Exports - United States | 0 | - | 4.75 | 62,095 |
| U.S. Bill of Rights | 0 | - | 4.53 | 32,479 |
| American Political Words | 0 | - | 4.39 | 23,389 |
| State Quiz - Alaska | 0 | - | 4.42 | 41,939 |
| State Quiz - Arizona | 0 | - | 4.44 | 36,624 |
| California Cities Map Quiz | 0 | - | 4.50 | 87,818 |
| State Quiz - California | 0 | - | 4.68 | 64,230 |
| State Quiz - Florida | 0 | - | 4.47 | 62,166 |
| Florida Cities Map Quiz | 0 | - | 4.48 | 60,787 |
| Countries that Visit Florida the Most | 0 | - | 4.70 | 71,942 |
| State Quiz - Georgia | 0 | - | 4.48 | 35,457 |
| Countries Closest to Hawaii | 0 | - | 4.54 | 53,465 |
| State Quiz - Illinois | 0 | - | 4.44 | 33,279 |
| State Quiz - Kentucky | 0 | - | 4.41 | 32,369 |
| State Quiz - Minnesota | 0 | - | 4.41 | 38,694 |
| New York Cities Map Quiz | 0 | - | 4.54 | 42,154 |
| State Quiz - New York | 0 | - | 4.52 | 45,954 |
| State Quiz - New Jersey | 0 | - | 4.42 | 38,041 |
| State Quiz - Texas | 0 | - | 4.43 | 62,717 |
| Six Flags Over Texas | 0 | - | 4.78 | 63,210 |
| State Quiz - Pennsylvania | 0 | - | 4.50 | 48,856 |
| State Quiz - Tennessee | 0 | - | 4.54 | 34,061 |
| State Quiz - Virginia | 0 | - | 4.52 | 40,193 |
| State Quiz - Washington | 0 | - | 4.45 | 36,319 |
| U.S. History A-Z #1 | 0 | - | 4.36 | 29,842 |
| Last Names in U.S. History #2 | 0 | - | 4.39 | 17,572 |
| U.S. State Quarters Picture Quiz #1 | 0 | - | 4.45 | 52,749 |
| U.S. State Quarters Picture Quiz #2 | 0 | - | 4.74 | 38,409 |
| U.S. States by Clue #1 | 0 | - | 4.51 | 38,881 |
| U.S. License Plates Picture Quiz | 0 | - | 4.59 | 52,797 |
| U.S. States with the Fewest Immigrants | 0 | - | 4.63 | 65,637 |
| U.S. States with More Cows than People | 0 | - | 4.74 | 47,453 |
| U.S. States with Spanish Names | 0 | - | 4.50 | 87,647 |
| States and Provinces that touch the Rocky Mountains | 0 | - | 4.42 | 32,459 |
| Name a Valid U.S. State #2 | 0 | - | 4.63 | 76,795 |
| Walking Across U.S. State Borders with Hints | 0 | - | 4.74 | 34,989 |
| Name a Valid U.S. State #3 | 0 | - | 4.78 | 48,890 |
| U.S. States with the Longest International Borders | 0 | - | 4.78 | 45,716 |
| Longest U.S. State Borders | 0 | - | 4.67 | 39,627 |
| Tourist Attractions by U.S. State | 0 | - | 4.46 | 62,529 |
| U.S. States with the Fewest Borders | 0 | - | 4.77 | 113,299 |
| U.S. States with the Most Borders | 0 | - | 4.53 | 62,269 |
| U.S. State Capitals Quiz | 0 | - | 5.00 | 1,684,142 |
| Countries that Beat Canada | 0 | - | 4.90 | 87,174 |
| The Trojan War | 0 | - | 4.83 | 39,597 |
| Letters of the Greek Alphabet | 0 | - | 4.97 | 645,131 |
| Name that Greek Letter | 0 | - | 4.93 | 322,755 |
| Greek Mythology General Knowledge #1 | 0 | - | 4.85 | 111,295 |
| Ancient Roman Trivia #1 | 0 | - | 4.85 | 84,330 |
| Roman Emperors | 0 | - | 4.95 | 119,427 |
| The Reign of Queen Elizabeth I | 0 | - | 4.53 | 31,705 |
| British History A-Z #1 | 0 | - | 4.45 | 46,330 |
| Houses of British Monarchs | 0 | - | 4.53 | 65,512 |
| Prime Ministers of the UK | 0 | - | 4.95 | 437,001 |
| The Iraq War | 0 | - | 4.47 | 15,616 |
| Important Cities in WWII | 0 | - | 4.42 | 93,248 |
| Countries with the Most Hindus | 0 | - | 4.90 | 122,716 |
| Colonies of Africa with a Map | 0 | - | 4.78 | 54,248 |
| Random Sequential Oceanic Countries on a Map | 0 | - | 4.97 | 27,045 |
| U.S. Geography by Letter - C | 0 | - | 4.27 | 73,767 |
| U.S. Geography by Letter - A | 0 | - | 4.37 | 62,739 |
| U.S. Geography by Letter - D | 0 | - | 4.08 | 56,737 |
| U.S. Geography by Letter - T | 0 | - | 4.29 | 49,409 |
| U.S. Geography by Letter - P | 0 | - | 4.36 | 47,854 |
| U.S. Geography by Letter - M | 0 | - | 4.14 | 52,970 |
| U.S. Geography by Letter - L | 0 | - | 4.04 | 40,832 |
| U.S. Geography by Letter - G | 0 | - | 4.13 | 38,968 |
| U.S. Geography By Letter - H | 0 | - | 4.35 | 39,782 |
| Panama Country Quiz | 0 | - | 4.61 | 25,719 |
| Dominican Republic Country Quiz | 0 | - | 4.61 | 23,340 |
| U.S. Cities A-Z by Clue #1 | 0 | - | 4.36 | 39,755 |
| Countries Closest to United States A-Z | 0 | - | 4.82 | 117,853 |
