| Deadliest U.S. Wars | 0 | - | 4.89 | 190,175 |
| Battle to Country | 0 | - | 4.91 | 52,997 |
| U.S. Five-Star Generals and Admirals | 0 | - | 4.33 | 8,320 |
| Top 10 Coldest U.S. States | 0 | - | 4.94 | 124,306 |
| Top 10 Hottest U.S. States | 0 | - | 4.86 | 125,183 |
| Top 10 U.S. States with the Least Precipitation | 0 | - | 4.82 | 61,742 |
| Canadian Prime Ministers | 0 | - | 4.63 | 57,323 |
| Countries Italy Declared War On | 0 | - | 4.75 | 43,177 |
| US States Quiz | 0 | - | 5.00 | 16,795,808 |
| All 3,143 Counties of the United States on a Map | 0 | - | 4.97 | 330,228 |
| 100 Most Influential Figures in U.S. History | 0 | - | 4.20 | 44,906 |
| The American Civil War | 0 | - | 4.62 | 52,313 |
| Famous Canadians by Picture | 0 | - | 4.39 | 49,247 |
| Name the English Monarchs | 0 | - | 4.92 | 500,527 |
| 10 Longest Rivers in the United States | 0 | - | 4.85 | 39,012 |
| U.S. Cities with the Biggest Economies | 0 | - | 4.84 | 72,487 |
| Countries Closest to United States by Continent | 0 | - | 4.99 | 145,948 |
| U.S. Federal Agency Acronyms | 0 | - | 4.50 | 79,873 |
| Louisiana Purchase with a Map | 0 | - | 4.96 | 48,193 |
| US States with an Empty Map | 0 | - | 5.00 | 621,877 |
| U.S. States or European Countries by Area | 0 | - | 4.95 | 95,483 |
| U.S. States or European Countries by Population | 0 | - | 4.97 | 132,638 |
| The Reign of Napoleon | 0 | - | 4.54 | 38,850 |
| Axis Occupied Countries of WWII | 0 | - | 4.99 | 228,434 |
| Countries in World War I | 0 | - | 4.88 | 227,571 |
| Rivers of the United States | 0 | - | 4.93 | 65,903 |
| Countries Closest to Alaska | 0 | - | 4.93 | 123,906 |
| Countries Closest to Maine | 0 | - | 4.85 | 66,826 |
| Name a Valid U.S. State #1 | 0 | - | 4.93 | 208,047 |
| Great Plains States and Provinces on a Map | 0 | - | 4.95 | 49,077 |
| Top 10 Most Native American U.S. States | 0 | - | 4.87 | 91,632 |
| 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 | 41,787 |
| Biggest Trading Partners - United States | 0 | - | 4.63 | 106,527 |
| All U.S. Supreme Court Justices | 0 | - | 4.54 | 29,032 |
| All U.S. Supreme Court Justices Ever | 0 | - | 4.49 | 11,723 |
| U.S. History for Dummies | 0 | - | 4.47 | 82,808 |
| U.S. States that Border Canada | 0 | - | 4.91 | 183,899 |
| U.S. States by Coldest Recorded Temperature | 0 | - | 4.51 | 66,381 |
| 10 U.S. States With The Highest Murder Rates | 0 | - | 4.47 | 53,736 |
| U.S. State Superlatives #1 | 0 | - | 4.47 | 87,415 |
| U.S. State Superlatives #2 | 0 | - | 4.53 | 40,560 |
| 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 | 63,599 |
| 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 | 57,921 |
| O Canada Lyrics | 0 | - | 4.47 | 50,895 |
| Canada Provinces and Territories | 0 | - | 5.00 | 340,277 |
| Canada Provinces Map Quiz | 0 | - | 4.99 | 638,268 |
| American Founding Fathers | 0 | - | 4.42 | 23,157 |
| People on Money - United States | 0 | - | 4.31 | 63,287 |
| U.S. History Groups of Two | 0 | - | 4.23 | 44,356 |
| Fifty US States in One Minute | 0 | - | 4.61 | 3,529,468 |
| Category Elimination - U.S. States #1 | 0 | - | 4.88 | 219,860 |
| Category Elimination - U.S. States #2 | 0 | - | 4.82 | 133,500 |
| U.S. States by Wikipedia Descriptions #1 | 0 | - | 4.57 | 39,282 |
| U.S. States by Wikipedia Descriptions #2 | 0 | - | 4.47 | 37,042 |
| Top 10 Richest U.S. States by Median Income | 0 | - | 4.47 | 118,733 |
| States of the German Confederation in 1848 | 0 | - | 4.90 | 31,802 |
| American History Quotes #1 | 0 | - | 4.37 | 95,891 |
| American History Quotes #2 | 0 | - | 4.38 | 41,333 |
| Last Names in U.S. History #1 | 0 | - | 4.25 | 36,187 |
| Catholic Countries in Europe | 0 | - | 4.83 | 94,671 |
| Monarchies of Europe | 0 | - | 4.90 | 97,769 |
| Countries of Europe in 1815 With a Map | 0 | - | 4.99 | 149,641 |
| Countries of Europe in 1848 | 0 | - | 4.98 | 75,947 |
| Every Country of Europe Since 1815 With a Map | 0 | - | 4.98 | 70,561 |
| Monarchies of Asia | 0 | - | 4.97 | 70,876 |
| Asian Country Superlatives | 0 | - | 4.83 | 80,689 |
| Countries in World War II | 0 | - | 4.54 | 909,171 |
| Countries of the Mongol Empire on a Map | 0 | - | 4.99 | 106,417 |
| Top 10 Richest Countries in Africa | 0 | - | 4.85 | 75,595 |
| Top 10 Biggest Economies in Africa | 0 | - | 4.99 | 119,849 |
| Category Elimination - African Geography #1 | 0 | - | 4.90 | 91,873 |
| Top 10 Richest Countries in the Americas | 0 | - | 4.93 | 82,396 |
| Top 10 Biggest Economies in the Americas | 0 | - | 4.93 | 91,530 |
| U.S. Geography by Letter - B | 0 | - | 4.53 | 69,009 |
| U.S. Geography by Letter - S | 0 | - | 4.55 | 52,490 |
| Mexico Country Quiz | 0 | - | 4.49 | 72,249 |
| Mexico Cities Map Quiz | 0 | - | 4.77 | 36,405 |
| Colombia Country Quiz | 0 | - | 4.90 | 40,562 |
| 15 Largest Cities in North America With a Map | 0 | - | 4.98 | 46,883 |
| 100 Biggest Cities in North America on a Map | 0 | - | 4.84 | 61,906 |
| Two Letter U.S. State Abbreviations | 0 | - | 4.19 | 745,524 |
| Biggest Cities in the U.S. - Extreme | 0 | - | 4.96 | 158,820 |
| Biggest Cities in Each U.S. State - Extreme | 0 | - | 4.93 | 79,083 |
| 10 Biggest Cities by U.S. State | 0 | - | 4.95 | 41,371 |
| 500 Biggest U.S. Urban Areas | 0 | - | 4.90 | 116,216 |
| Richest Metro Areas in the U.S. | 0 | - | 4.42 | 43,493 |
| U.S. Cabinet Departments | 0 | - | 4.86 | 72,724 |
| 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 | 3,678,774 |
| 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 | 1,386,646 |
| U.S. States by Hottest Recorded Temperature | 0 | - | 4.36 | 57,298 |
| US States by Borders in 30 Seconds | 0 | - | 4.67 | 2,673,645 |
| 10 U.S. States with the Highest Tax Burden | 0 | - | 4.26 | 38,138 |
| Top 10 U.S. States by Manufacturing Employment | 0 | - | 4.49 | 28,782 |
| Most-Visited Countries by Canadians | 0 | - | 4.82 | 39,210 |
| Countries Closest to Canada | 0 | - | 4.90 | 197,830 |
| U.S. States With No City Over 100,000 | 0 | - | 4.57 | 17,910 |
| Top 10 Coldest European Countries | 0 | - | 4.94 | 192,707 |
| Top 10 Hottest European Countries | 0 | - | 4.88 | 126,582 |
| Biggest Countries in Europe in 1700 | 0 | - | 4.73 | 58,326 |
| Top 10 Richest Countries in Europe | 0 | - | 4.90 | 148,891 |
| Top 10 Biggest Economies in Europe | 0 | - | 4.98 | 198,243 |
| Biggest Trading Partners - European Union | 0 | - | 4.91 | 72,468 |
| Category Elimination - European Geography #1 | 0 | - | 4.98 | 232,076 |
| Category Elimination - European Geography #2 | 0 | - | 4.99 | 166,263 |
| Category Elimination - European Countries #1 | 0 | - | 4.89 | 89,584 |
| Modern-Day Countries of the British Empire in 1921 | 0 | - | 4.99 | 116,977 |
| Asian Last Names in the United States | 0 | - | 4.43 | 46,656 |
| Top 10 Coldest Asian Countries | 0 | - | 4.95 | 122,721 |
| Top 10 Biggest Economies in Asia | 0 | - | 4.85 | 120,152 |
| Category Elimination - Asian Geography #1 | 0 | - | 4.85 | 109,436 |
| Category Elimination - Asian Geography #2 | 0 | - | 4.94 | 96,144 |
| The Vietnam War | 0 | - | 4.43 | 35,428 |
| WWII Geography | 0 | - | 4.81 | 119,966 |
| Hindu Countries | 0 | - | 4.86 | 49,886 |
| Countries Bordering Brazil | 0 | - | 4.96 | 131,343 |
| Countries That Visit Brazil The Most | 0 | - | 4.95 | 49,437 |
| Costa Rica Country Quiz | 0 | - | 4.75 | 32,072 |
| Cuba Country Quiz | 0 | - | 4.70 | 51,359 |
| Names of Generations | 0 | - | 4.00 | 39,251 |
| Arms Exports - United States | 0 | - | 4.75 | 62,091 |
| U.S. Bill of Rights | 0 | - | 4.53 | 32,479 |
| American Political Words | 0 | - | 4.39 | 23,389 |
| State Quiz - Alaska | 0 | - | 4.42 | 41,938 |
| State Quiz - Arizona | 0 | - | 4.44 | 36,624 |
| California Cities Map Quiz | 0 | - | 4.50 | 87,817 |
| State Quiz - California | 0 | - | 4.68 | 64,230 |
| State Quiz - Florida | 0 | - | 4.47 | 62,165 |
| Florida Cities Map Quiz | 0 | - | 4.48 | 60,785 |
| Countries that Visit Florida the Most | 0 | - | 4.70 | 71,938 |
| State Quiz - Georgia | 0 | - | 4.48 | 35,457 |
| Countries Closest to Hawaii | 0 | - | 4.54 | 53,462 |
| State Quiz - Illinois | 0 | - | 4.44 | 33,278 |
| State Quiz - Kentucky | 0 | - | 4.41 | 32,368 |
| 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 | 45,951 |
| State Quiz - New Jersey | 0 | - | 4.42 | 38,041 |
| State Quiz - Texas | 0 | - | 4.43 | 62,716 |
| Six Flags Over Texas | 0 | - | 4.78 | 63,208 |
| State Quiz - Pennsylvania | 0 | - | 4.50 | 48,855 |
| State Quiz - Tennessee | 0 | - | 4.54 | 34,060 |
| State Quiz - Virginia | 0 | - | 4.52 | 40,193 |
| State Quiz - Washington | 0 | - | 4.45 | 36,317 |
| U.S. History A-Z #1 | 0 | - | 4.36 | 29,839 |
| 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 | 38,879 |
| U.S. License Plates Picture Quiz | 0 | - | 4.59 | 52,796 |
| U.S. States with the Fewest Immigrants | 0 | - | 4.63 | 65,637 |
| U.S. States with More Cows than People | 0 | - | 4.74 | 47,439 |
| 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 | 76,793 |
| Walking Across U.S. State Borders with Hints | 0 | - | 4.74 | 34,988 |
| Name a Valid U.S. State #3 | 0 | - | 4.78 | 48,886 |
| U.S. States with the Longest International Borders | 0 | - | 4.78 | 45,716 |
| Longest U.S. State Borders | 0 | - | 4.67 | 39,625 |
| Tourist Attractions by U.S. State | 0 | - | 4.46 | 62,529 |
| U.S. States with the Fewest Borders | 0 | - | 4.77 | 113,296 |
| U.S. States with the Most Borders | 0 | - | 4.53 | 62,269 |
| U.S. State Capitals Quiz | 0 | - | 5.00 | 1,684,073 |
| Countries that Beat Canada | 0 | - | 4.90 | 87,172 |
| The Trojan War | 0 | - | 4.83 | 39,594 |
| Letters of the Greek Alphabet | 0 | - | 4.97 | 645,111 |
| Name that Greek Letter | 0 | - | 4.93 | 322,746 |
| Greek Mythology General Knowledge #1 | 0 | - | 4.85 | 111,289 |
| Ancient Roman Trivia #1 | 0 | - | 4.85 | 84,330 |
| Roman Emperors | 0 | - | 4.95 | 119,417 |
| The Reign of Queen Elizabeth I | 0 | - | 4.53 | 31,704 |
| British History A-Z #1 | 0 | - | 4.45 | 46,330 |
| Houses of British Monarchs | 0 | - | 4.53 | 65,509 |
| Prime Ministers of the UK | 0 | - | 4.95 | 436,995 |
| The Iraq War | 0 | - | 4.47 | 15,615 |
| Important Cities in WWII | 0 | - | 4.42 | 93,244 |
| Countries with the Most Hindus | 0 | - | 4.90 | 122,712 |
| Colonies of Africa with a Map | 0 | - | 4.78 | 54,247 |
| Random Sequential Oceanic Countries on a Map | 0 | - | 4.97 | 27,043 |
| U.S. Geography by Letter - C | 0 | - | 4.27 | 73,766 |
| U.S. Geography by Letter - A | 0 | - | 4.37 | 62,738 |
| U.S. Geography by Letter - D | 0 | - | 4.08 | 56,734 |
| U.S. Geography by Letter - T | 0 | - | 4.29 | 49,408 |
| U.S. Geography by Letter - P | 0 | - | 4.36 | 47,853 |
| U.S. Geography by Letter - M | 0 | - | 4.14 | 52,969 |
| U.S. Geography by Letter - L | 0 | - | 4.04 | 40,830 |
| U.S. Geography by Letter - G | 0 | - | 4.13 | 38,967 |
| U.S. Geography By Letter - H | 0 | - | 4.35 | 39,779 |
| Panama Country Quiz | 0 | - | 4.61 | 25,718 |
| Dominican Republic Country Quiz | 0 | - | 4.61 | 23,337 |
| U.S. Cities A-Z by Clue #1 | 0 | - | 4.36 | 39,754 |
| Countries Closest to United States A-Z | 0 | - | 4.82 | 117,851 |
