| U.S. Cabinet Departments | 0 | - | 4.86 | 71,821 |
| U.S. Federal Agency Acronyms | 0 | - | 4.50 | 79,308 |
| Deadliest U.S. Wars | 0 | - | 4.89 | 187,078 |
| U.S. States by Governor | 0 | - | 4.43 | 17,812 |
| U.S. Political Parties in History | 0 | - | 4.44 | 27,364 |
| U.S. Government Agencies | 0 | - | 4.44 | 19,284 |
| US States Quiz | 0 | - | 5.00 | 16,424,441 |
| U.S. National Parks Quiz | 0 | - | 4.84 | 53,580 |
| Total United States Immigration by Country | 0 | - | 4.90 | 108,474 |
| Most Common U.S. Last Names - Extreme | 0 | - | 4.94 | 171,046 |
| "Do Not Travel" Countries for U.S. Citizens | 0 | - | 4.97 | 234,444 |
| Top 10 Non-English Languages Spoken in New York City | 0 | - | 4.84 | 64,044 |
| States of the U.S. in Alphabetical Order | 0 | - | 4.98 | 362,097 |
| Top 10 Coldest U.S. States | 0 | - | 4.94 | 121,816 |
| Top 10 Hottest U.S. States | 0 | - | 4.86 | 122,833 |
| Top 10 U.S. States with the Least Precipitation | 0 | - | 4.82 | 60,866 |
| All 3,143 Counties of the United States on a Map | 0 | - | 4.96 | 321,331 |
| The U.S. Government - How Does it Work? | 0 | - | 4.34 | 41,885 |
| Pixelated United States Map | 0 | - | 4.90 | 91,971 |
| Most-Visited Countries by Americans | 0 | - | 4.87 | 106,199 |
| Countries that Visit the United States the Most | 0 | - | 4.96 | 89,163 |
| The 13 Colonies Quiz | 0 | - | 4.97 | 115,030 |
| U.S. States with the Letter Y | 0 | - | 4.85 | 108,563 |
| 10 Southernmost U.S. States | 0 | - | 4.88 | 110,612 |
| U.S. States with Short Names | 0 | - | 4.91 | 145,496 |
| U.S. States that Start with M | 0 | - | 4.93 | 183,741 |
| U.S. States By Population | 0 | - | 4.90 | 139,869 |
| U.S. States that Start with N | 0 | - | 4.95 | 168,198 |
| U.S. States with Longest Names | 0 | - | 4.84 | 42,837 |
| U.S. States with a Unique First Letter | 0 | - | 4.96 | 86,195 |
| 10 Westernmost U.S. States | 0 | - | 4.95 | 62,950 |
| The Only Remaining U.S. State . . . | 0 | - | 4.92 | 63,735 |
| US States with an Empty Map | 0 | - | 5.00 | 610,294 |
| 10 Longest Rivers in the United States | 0 | - | 4.84 | 38,277 |
| Countries Closest to United States by Continent | 0 | - | 4.99 | 143,631 |
| Countries that Beat the United States | 0 | - | 4.93 | 162,834 |
| Senators Who Ran For President | 0 | - | 4.23 | 16,902 |
| U.S. Electoral College Landslides | 0 | - | 4.34 | 21,852 |
| Louisiana Purchase with a Map | 0 | - | 4.96 | 45,932 |
| Top 10 Most-Visited U.S. States | 0 | - | 4.90 | 99,266 |
| U.S. States with the Most Immigrants | 0 | - | 4.84 | 80,576 |
| U.S. States or European Countries by Area | 0 | - | 4.94 | 92,174 |
| U.S. States or European Countries by Population | 0 | - | 4.98 | 129,437 |
| Name a Valid U.S. State #1 | 0 | - | 4.93 | 203,814 |
| Top 10 Most Native American U.S. States | 0 | - | 4.86 | 89,231 |
| U.S. Citizenship Test Questions | 0 | - | 4.83 | 236,017 |
| U.S. Political Figures by Picture #1 | 0 | - | 4.14 | 25,959 |
| U.S. Political Figures by Picture #2 | 0 | - | 4.10 | 15,363 |
| Female Political Figures by Picture - U.S. | 0 | - | 4.20 | 10,712 |
| Canadian Prime Ministers Quiz | 0 | - | 4.63 | 56,120 |
| Top 10 Biggest Economies in the Americas | 0 | - | 4.93 | 90,045 |
| States of Mexico | 0 | - | 4.95 | 167,910 |
| Mexico States Map Quiz | 0 | - | 4.84 | 101,711 |
| Top U.S. Universities | 0 | - | 4.15 | 141,740 |
| 10 U.S. States With The Lowest Murder Rates | 0 | - | 4.49 | 36,711 |
| Biggest Trading Partners - United States | 0 | - | 4.63 | 105,741 |
| 10 U.S. States With The Highest Murder Rates | 0 | - | 4.45 | 49,363 |
| U.S. State Superlatives #1 | 0 | - | 4.47 | 86,694 |
| U.S. State Superlatives #2 | 0 | - | 4.53 | 40,119 |
| Top 10 U.S. States With the Most Tornadoes | 0 | - | 4.53 | 63,803 |
| Top 10 Least Religious U.S. States | 0 | - | 4.51 | 33,707 |
| Top 10 U.S. States by Public Transit | 0 | - | 4.77 | 62,719 |
| Top 10 U.S. States with the Most Precipitation | 0 | - | 4.46 | 41,266 |
| Top 10 Richest Countries in the Americas | 0 | - | 4.90 | 75,270 |
| U.S. State Nicknames Quiz | 0 | - | 4.50 | 49,707 |
| Countries with American Expatriates | 0 | - | 4.55 | 42,268 |
| United States Landmarks Map Quiz | 0 | - | 4.55 | 39,872 |
| United States Country Quiz | 0 | - | 4.45 | 99,000 |
| Busiest Air Routes from the U.S. | 0 | - | 4.47 | 76,143 |
| Politicians with Other Careers Quiz | 0 | - | 3.98 | 14,929 |
| Main Parts of the U.S. Budget | 0 | - | 3.49 | 8,601 |
| U.S. Presidents Quiz | 0 | - | 5.00 | 3,590,299 |
| 100 Most Influential Figures in U.S. History | 0 | - | 4.21 | 44,304 |
| Countries Closest to Canada | 0 | - | 4.90 | 195,674 |
| Asian Countries Americans Travel to the Most | 0 | - | 4.74 | 59,084 |
| U.S. Geography by Letter - B | 0 | - | 4.54 | 67,065 |
| U.S. Geography by Letter - S | 0 | - | 4.54 | 50,953 |
| Two Letter U.S. State Abbreviations | 0 | - | 4.18 | 736,631 |
| Most Guessed U.S. Cities | 0 | - | 4.88 | 102,857 |
| U.S. Cities with the Biggest Economies | 0 | - | 4.83 | 70,701 |
| Children of U.S. Presidents | 0 | - | 3.95 | 16,588 |
| Top 10 Non-English Languages of Los Angeles | 0 | - | 4.42 | 59,027 |
| 10 Closest Megacities to New York City | 0 | - | 4.52 | 66,876 |
| New England States | 0 | - | 4.51 | 59,509 |
| U.S. States by Land Area | 0 | - | 4.62 | 51,832 |
| Top 10 U.S. States by Inland Water Area | 0 | - | 4.53 | 37,697 |
| Add a Letter - Make a U.S. State | 0 | - | 4.73 | 81,558 |
| Top 10 Widest U.S. States East to West | 0 | - | 4.69 | 55,029 |
| Top 10 Tallest U.S. States North to South | 0 | - | 4.78 | 40,262 |
| U.S. States by Borders | 0 | - | 4.62 | 34,715 |
| U.S. States by Wikipedia Descriptions #1 | 0 | - | 4.57 | 38,943 |
| U.S. States by Wikipedia Descriptions #2 | 0 | - | 4.47 | 36,753 |
| 10 Easternmost U.S. States | 0 | - | 4.53 | 55,793 |
| The Only U.S. State ... #1 | 0 | - | 4.52 | 100,502 |
| 50 States, 50 Cities - Hard Version | 0 | - | 4.47 | 43,479 |
| Top 10 Richest U.S. States by Median Income | 0 | - | 4.47 | 117,539 |
| Asian Last Names in the United States | 0 | - | 4.43 | 46,109 |
| United States Map Quiz | 0 | - | 4.98 | 4,116,217 |
| U.S. Bill of Rights | 0 | - | 4.53 | 32,197 |
| U.S. License Plates Picture Quiz | 0 | - | 4.58 | 52,129 |
| U.S. States with the Fewest Immigrants | 0 | - | 4.63 | 64,692 |
| U.S. States with the Highest Percentage of Farmland | 0 | - | 4.80 | 64,858 |
| U.S. States with the Lowest Percentage of Farmland | 0 | - | 4.74 | 54,762 |
| U.S. States with the Longest International Borders | 0 | - | 4.78 | 45,219 |
| Longest U.S. State Borders | 0 | - | 4.64 | 38,621 |
| Top 10 U.S. States with the Highest Elevation | 0 | - | 4.51 | 67,566 |
| 10 U.S. States with the Highest Tax Burden | 0 | - | 4.26 | 37,651 |
| Top 10 U.S. States by Manufacturing Employment | 0 | - | 4.49 | 28,579 |
| U.S. States with the Lowest Average Elevation | 0 | - | 4.55 | 38,189 |
| U.S. States With the Highest Average Elevation | 0 | - | 4.61 | 32,487 |
| U.S. States with the Fewest Borders | 0 | - | 4.77 | 112,157 |
| U.S. States with the Most Borders | 0 | - | 4.53 | 62,085 |
| U.S. States With No City Over 100,000 | 0 | - | 4.55 | 17,524 |
| Flags of North and South America | 0 | - | 4.99 | 350,062 |
| Belize Country Quiz | 0 | - | 4.84 | 20,520 |
| Largest United States Airlines | 0 | - | 4.39 | 54,440 |
| Third Most Common Language by U.S. State | 0 | - | 4.89 | 112,821 |
| U.S. Five-Star Generals and Admirals | 0 | - | 4.36 | 8,252 |
| Countries Closest to United States A-Z | 0 | - | 4.83 | 116,051 |
| All U.S. Supreme Court Justices | 0 | - | 4.53 | 28,621 |
| All U.S. Supreme Court Justices Ever | 0 | - | 4.47 | 11,488 |
| U.S. Presidents by Picture | 0 | - | 4.86 | 419,355 |
| Florida Pro Sport Teams | 0 | - | 4.61 | 11,589 |
| Georgia ... or Georgia? | 0 | - | 4.69 | 75,808 |
| U.S. Geography by Letter - C | 0 | - | 4.26 | 72,129 |
| U.S. Geography by Letter - A | 0 | - | 4.36 | 60,963 |
| U.S. Geography by Letter - D | 0 | - | 4.08 | 55,022 |
| U.S. Geography by Letter - T | 0 | - | 4.27 | 47,923 |
| U.S. Geography by Letter - P | 0 | - | 4.33 | 46,149 |
| U.S. Geography by Letter - M | 0 | - | 4.20 | 45,105 |
| U.S. Geography by Letter - G | 0 | - | 4.11 | 37,373 |
| U.S. Geography By Letter - H | 0 | - | 4.37 | 37,880 |
| American Legal Vocabulary | 0 | - | 4.40 | 33,556 |
| U.S. Cities by Picture #1 | 0 | - | 4.37 | 33,993 |
| Cities by Picture #2 | 0 | - | 4.19 | 34,634 |
| Countries Closest to the U. S. | 0 | - | 4.40 | 205,137 |
| American Political Words | 0 | - | 4.39 | 23,192 |
| First Names of U.S. Presidents | 0 | - | 4.85 | 376,017 |
| Famous People from California by Picture | 0 | - | 4.31 | 35,623 |
| California Groups of Things | 0 | - | 4.24 | 44,980 |
| Hawaiian Islands Map Quiz | 0 | - | 4.78 | 22,061 |
| New York Groups of Things | 0 | - | 4.37 | 59,592 |
| People on Money - United States | 0 | - | 4.30 | 63,028 |
| U.S. History Groups of Two | 0 | - | 4.23 | 43,910 |
| Last 10 U.S. States Alphabetically | 0 | - | 4.35 | 74,059 |
| Top 10 Least Populous U.S. State Capitals | 0 | - | 4.51 | 21,351 |
| Flyover States | 0 | - | 4.52 | 29,195 |
| U.S. States With Double Letters | 0 | - | 4.59 | 23,538 |
| U.S. States Bigger than Their Neighbors | 0 | - | 4.27 | 75,212 |
| States and Provinces that touch the Rocky Mountains | 0 | - | 4.42 | 32,265 |
| Name a Valid U.S. State #2 | 0 | - | 4.63 | 75,628 |
| Name a Valid U.S. State #3 | 0 | - | 4.77 | 47,862 |
| 50 States, 50 Cities - Easy Version | 0 | - | 4.40 | 126,661 |
| Top 10 Least-Forested U.S. States | 0 | - | 4.50 | 45,738 |
| Famous Canadians by Picture | 0 | - | 4.39 | 48,731 |
| European Secessionist Movements on a Map | 0 | - | 4.53 | 34,297 |
| The Only American Country ... | 0 | - | 4.92 | 118,647 |
| American Countries with the Shortest Names | 0 | - | 4.96 | 119,007 |
| U.S. State Border Crossings | 0 | - | 4.97 | 94,663 |
| U.S. Cities with the Most International Tourists | 0 | - | 4.88 | 73,334 |
| Name a Valid U.S. President #1 | 0 | - | 4.89 | 187,008 |
| Cities and Towns of Massachusetts | 0 | - | 4.92 | 71,756 |
| Who Did that Motown Song | 0 | - | 4.48 | 12,977 |
| Regions of U.S. States | 0 | - | 4.28 | 35,957 |
| States, Provinces & Territories that Touch the Appalachian Mountains | 0 | - | 4.59 | 20,275 |
| 10 U.S. States with the Most Valuable Crops | 0 | - | 4.41 | 29,355 |
| U.S. States with the Lowest HDI | 0 | - | 4.46 | 28,607 |
| Which U.S. State - Multiple Choice | 0 | - | 4.48 | 20,062 |
| Movies by State | 0 | - | 4.24 | 40,289 |
| U.S. States with the Fewest Traffic Fatalities | 0 | - | 4.20 | 20,883 |
| U.S. States with the Most Traffic Fatalities | 0 | - | 4.10 | 18,896 |
| Canada Country Quiz | 0 | - | 4.53 | 130,127 |
| Canada Cities Map Quiz | 0 | - | 4.63 | 122,654 |
| Canada A-Z | 0 | - | 4.70 | 32,351 |
| Shortest U.S. Presidential Terms | 0 | - | 4.81 | 12,285 |
| Catholic Countries in Europe | 0 | - | 4.83 | 92,818 |
| Monarchies of Europe | 0 | - | 4.89 | 95,933 |
| Monarchies of Asia | 0 | - | 4.97 | 69,843 |
| Asian Country Superlatives | 0 | - | 4.83 | 79,685 |
| Top 10 Biggest Economies in Africa | 0 | - | 4.99 | 118,355 |
| Mexico Country Quiz | 0 | - | 4.49 | 71,145 |
| Mexico Cities Map Quiz | 0 | - | 4.77 | 32,981 |
| All First-Level Subdivisions of South America on a Map | 0 | - | 4.91 | 50,804 |
| Brazil States Map Quiz | 0 | - | 4.85 | 46,220 |
| States of Brazil | 0 | - | 4.98 | 83,550 |
| Fictional Characters from the Midwest by Picture | 0 | - | 4.04 | 19,079 |
| U.S. States by Picture #1 | 0 | - | 4.21 | 15,223 |
| U.S. Cities with the Highest Murder Rate | 0 | - | 4.54 | 136,653 |
| Most-Visited U.S. Cities | 0 | - | 4.85 | 89,559 |
| Every U.S. Metro Area on a Map | 0 | - | 4.97 | 78,911 |
| Richest Metro Areas in the U.S. | 0 | - | 4.42 | 42,249 |
| Geography of California | 0 | - | 4.25 | 10,369 |
| California Pro Sport Teams | 0 | - | 4.19 | 22,575 |
| Chicago City Trivia | 0 | - | 4.30 | 31,234 |
| New York Pro Sport Teams | 0 | - | 4.32 | 25,636 |
| Countries Larger Than Texas but With Fewer People | 0 | - | 4.89 | 26,688 |
| Texas Pro Sport Teams | 0 | - | 4.19 | 16,690 |
| History of Pennsylvania | 0 | - | 4.16 | 7,034 |
| History of Virginia | 0 | - | 4.31 | 11,490 |
| Washington State by Picture | 0 | - | 4.26 | 7,611 |
