| U.S. Cabinet Departments | 0 | - | 4.86 | 71,033 |
| U.S. Federal Agency Acronyms | 0 | - | 4.50 | 78,728 |
| Deadliest U.S. Wars | 0 | - | 4.89 | 184,669 |
| U.S. States by Governor Quiz | 0 | - | 4.42 | 17,626 |
| U.S. Political Parties in History | 0 | - | 4.44 | 27,127 |
| U.S. Government Agencies | 0 | - | 4.44 | 18,960 |
| US States Quiz | 0 | - | 5.00 | 16,054,804 |
| U.S. National Parks Quiz | 0 | - | 4.82 | 51,792 |
| Total United States Immigration by Country | 0 | - | 4.90 | 105,856 |
| Most Common U.S. Last Names - Extreme | 0 | - | 4.95 | 168,243 |
| "Do Not Travel" Countries for U.S. Citizens | 0 | - | 4.96 | 212,427 |
| Top 10 Non-English Languages Spoken in New York City | 0 | - | 4.84 | 62,639 |
| States of the U.S. in Alphabetical Order | 0 | - | 4.98 | 357,775 |
| Top 10 Coldest U.S. States | 0 | - | 4.93 | 119,675 |
| Top 10 Hottest U.S. States | 0 | - | 4.86 | 120,218 |
| Top 10 U.S. States with the Least Precipitation | 0 | - | 4.81 | 60,074 |
| The U.S. Government - How Does it Work? | 0 | - | 4.34 | 41,474 |
| Pixelated United States Map | 0 | - | 4.89 | 89,666 |
| Most-Visited Countries by Americans | 0 | - | 4.87 | 103,198 |
| Countries that Visit the United States the Most | 0 | - | 4.96 | 86,787 |
| The 13 Colonies Quiz | 0 | - | 4.97 | 111,810 |
| U.S. States with the Letter Y | 0 | - | 4.85 | 106,029 |
| 10 Southernmost U.S. States | 0 | - | 4.88 | 108,207 |
| U.S. States with Short Names | 0 | - | 4.90 | 142,120 |
| U.S. States that Start with M | 0 | - | 4.93 | 179,871 |
| U.S. States By Population | 0 | - | 4.90 | 138,041 |
| U.S. States that Start with N | 0 | - | 4.95 | 165,683 |
| U.S. States with Longest Names | 0 | - | 4.87 | 41,320 |
| U.S. States with a Unique First Letter | 0 | - | 4.96 | 84,401 |
| 10 Westernmost U.S. States | 0 | - | 4.95 | 61,888 |
| The Only Remaining U.S. State . . . | 0 | - | 4.93 | 62,217 |
| US States with an Empty Map | 0 | - | 5.00 | 598,849 |
| 10 Longest Rivers in the United States | 0 | - | 4.85 | 37,527 |
| All 3,143 Counties of the United States on a Map | 0 | - | 4.96 | 312,429 |
| Countries Closest to United States by Continent | 0 | - | 4.99 | 141,323 |
| Countries that Beat the United States | 0 | - | 4.93 | 159,527 |
| Senators Who Ran For President | 0 | - | 4.28 | 16,772 |
| U.S. Electoral College Landslides | 0 | - | 4.34 | 21,668 |
| Louisiana Purchase with a Map | 0 | - | 4.96 | 43,208 |
| Top 10 Most-Visited U.S. States | 0 | - | 4.90 | 97,219 |
| U.S. States with the Most Immigrants | 0 | - | 4.84 | 79,075 |
| U.S. States or European Countries by Area | 0 | - | 4.94 | 89,191 |
| U.S. States or European Countries by Population | 0 | - | 4.98 | 126,304 |
| Name a Valid U.S. State #1 | 0 | - | 4.93 | 199,853 |
| Top 10 Most Native American U.S. States | 0 | - | 4.85 | 87,233 |
| U.S. Citizenship Test Questions | 0 | - | 4.83 | 233,080 |
| U.S. Political Figures by Picture #1 | 0 | - | 4.13 | 25,764 |
| U.S. Political Figures by Picture #2 | 0 | - | 4.10 | 15,227 |
| Female Political Figures by Picture - U.S. | 0 | - | 4.20 | 10,588 |
| Canadian Prime Ministers Quiz | 0 | - | 4.63 | 54,740 |
| Top 10 Biggest Economies in the Americas | 0 | - | 4.93 | 88,246 |
| States of Mexico | 0 | - | 4.93 | 161,206 |
| Mexico States Map Quiz | 0 | - | 4.82 | 99,157 |
| Top U.S. Universities | 0 | - | 4.15 | 138,726 |
| 10 U.S. States With The Lowest Murder Rates | 0 | - | 4.48 | 36,184 |
| Biggest Trading Partners - US | 0 | - | 4.63 | 104,998 |
| 10 U.S. States With The Highest Murder Rates | 0 | - | 4.44 | 48,896 |
| U.S. State Superlatives #1 | 0 | - | 4.46 | 77,525 |
| U.S. State Superlatives #2 | 0 | - | 4.53 | 39,003 |
| Top 10 U.S. States With the Most Tornadoes | 0 | - | 4.53 | 63,158 |
| Top 10 Least Religious U.S. States | 0 | - | 4.50 | 33,206 |
| Top 10 U.S. States by Public Transit | 0 | - | 4.78 | 61,860 |
| Top 10 U.S. States with the Most Precipitation | 0 | - | 4.46 | 40,897 |
| Top 10 Richest Countries in the Americas | 0 | - | 4.90 | 74,115 |
| U.S. State Nicknames Quiz | 0 | - | 4.49 | 48,906 |
| Countries with American Expatriates | 0 | - | 4.55 | 42,012 |
| United States Landmarks Map Quiz | 0 | - | 4.55 | 39,565 |
| United States Country Quiz | 0 | - | 4.45 | 96,841 |
| Busiest Air Routes from the U.S. | 0 | - | 4.47 | 75,493 |
| Politicians with Other Careers Quiz | 0 | - | 3.98 | 14,843 |
| Main Parts of the U.S. Budget | 0 | - | 3.52 | 8,495 |
| U.S. Presidents Quiz | 0 | - | 5.00 | 3,495,850 |
| 100 Most Influential Figures in U.S. History | 0 | - | 4.19 | 43,780 |
| Countries Closest to Canada | 0 | - | 4.90 | 193,107 |
| Asian Countries Americans Travel to the Most | 0 | - | 4.74 | 58,332 |
| U.S. Geography by Letter - B | 0 | - | 4.53 | 64,838 |
| U.S. Geography by Letter - S | 0 | - | 4.54 | 49,349 |
| Two Letter U.S. State Abbreviations | 0 | - | 4.19 | 728,579 |
| Most Guessed U.S. Cities | 0 | - | 4.88 | 100,217 |
| U.S. Cities with the Biggest Economies | 0 | - | 4.83 | 68,763 |
| Countries Closest to the U. S. | 0 | - | 4.41 | 203,303 |
| Children of U.S. Presidents | 0 | - | 3.95 | 16,515 |
| Top 10 Non-English Languages of Los Angeles | 0 | - | 4.42 | 58,333 |
| 10 Closest Megacities to New York City | 0 | - | 4.52 | 66,425 |
| New England States | 0 | - | 4.51 | 59,262 |
| US States by Land Area | 0 | - | 4.56 | 51,193 |
| Top 10 U.S. States by Inland Water Area | 0 | - | 4.53 | 37,435 |
| Add a Letter - Make a U.S. State | 0 | - | 4.70 | 80,521 |
| Top 10 Widest U.S. States East to West | 0 | - | 4.69 | 54,176 |
| Top 10 Tallest U.S. States North to South | 0 | - | 4.78 | 39,607 |
| U.S. States by Borders | 0 | - | 4.61 | 34,186 |
| U.S. States by Wikipedia Descriptions #1 | 0 | - | 4.57 | 38,678 |
| U.S. States by Wikipedia Descriptions #2 | 0 | - | 4.47 | 36,500 |
| 10 Easternmost U.S. States | 0 | - | 4.55 | 55,198 |
| The Only U.S. State ... #1 | 0 | - | 4.52 | 85,827 |
| 50 States, 50 Cities - Hard Version | 0 | - | 4.47 | 42,943 |
| Top 10 Richest U.S. States by Median Income | 0 | - | 4.47 | 116,527 |
| Asian Last Names in the United States | 0 | - | 4.43 | 45,566 |
| United States Map Quiz | 0 | - | 4.98 | 4,074,967 |
| U.S. Bill of Rights | 0 | - | 4.53 | 31,930 |
| U.S. License Plates Picture Quiz | 0 | - | 4.61 | 51,496 |
| U.S. States with the Fewest Immigrants | 0 | - | 4.69 | 63,708 |
| U.S. States with the Highest Percentage of Farmland | 0 | - | 4.74 | 55,614 |
| U.S. States with the Lowest Percentage of Farmland | 0 | - | 4.74 | 54,346 |
| U.S. States with the Longest International Borders | 0 | - | 4.78 | 44,725 |
| Longest U.S. State Borders | 0 | - | 4.63 | 37,696 |
| Top 10 U.S. States with the Highest Elevation | 0 | - | 4.51 | 67,264 |
| 10 U.S. States with the Highest Tax Burden | 0 | - | 4.26 | 37,137 |
| Top 10 U.S. States by Manufacturing Employment | 0 | - | 4.51 | 28,398 |
| U.S. States with the Lowest Average Elevation | 0 | - | 4.55 | 37,909 |
| U.S. States With the Highest Average Elevation | 0 | - | 4.61 | 32,236 |
| U.S. States with the Fewest Borders | 0 | - | 4.78 | 110,790 |
| U.S. States with the Most Borders | 0 | - | 4.53 | 61,893 |
| U.S. States With No City Over 100,000 | 0 | - | 4.55 | 17,117 |
| Flags of North and South America Quiz | 0 | - | 4.99 | 339,235 |
| Belize Country Quiz | 0 | - | 4.87 | 20,169 |
| Largest United States Airlines | 0 | - | 4.38 | 53,806 |
| Third Most Common Language by U.S. State | 0 | - | 4.90 | 111,957 |
| U.S. Five-Star Generals and Admirals | 0 | - | 4.34 | 8,195 |
| Countries Closest to United States A-Z | 0 | - | 4.83 | 113,838 |
| All U.S. Supreme Court Justices | 0 | - | 4.51 | 28,351 |
| All U.S. Supreme Court Justices Ever | 0 | - | 4.44 | 11,256 |
| U.S. Presidents by Picture | 0 | - | 4.85 | 413,789 |
| Florida Pro Sport Teams | 0 | - | 4.68 | 11,313 |
| Georgia ... or Georgia? | 0 | - | 4.70 | 75,015 |
| U.S. Geography by Letter - C | 0 | - | 4.25 | 70,135 |
| U.S. Geography by Letter - A | 0 | - | 4.34 | 58,901 |
| U.S. Geography by Letter - D | 0 | - | 4.08 | 53,000 |
| U.S. Geography by Letter - T | 0 | - | 4.27 | 46,443 |
| U.S. Geography by Letter - P | 0 | - | 4.33 | 44,527 |
| U.S. Geography by Letter - M | 0 | - | 4.19 | 43,588 |
| American Legal Vocabulary | 0 | - | 4.40 | 33,248 |
| U.S. Cities by Picture #1 | 0 | - | 4.37 | 33,531 |
| Cities by Picture #2 | 0 | - | 4.18 | 34,200 |
| American Political Words | 0 | - | 4.39 | 23,023 |
| First Names of U.S. Presidents | 0 | - | 4.85 | 371,929 |
| Famous People from California by Picture | 0 | - | 4.29 | 34,879 |
| California Groups of Things | 0 | - | 4.24 | 44,560 |
| Hawaiian Islands Map Quiz | 0 | - | 4.77 | 21,889 |
| New York Groups of Things | 0 | - | 4.36 | 59,162 |
| Famous People from Texas by Picture | 0 | - | 4.03 | 32,808 |
| People on Money - United States | 0 | - | 4.32 | 62,768 |
| U.S. History Groups of Two | 0 | - | 4.23 | 43,514 |
| Last 10 U.S. States Alphabetically | 0 | - | 4.35 | 73,421 |
| Top 10 Least Populous U.S. State Capitals | 0 | - | 4.50 | 21,176 |
| Flyover States | 0 | - | 4.52 | 28,956 |
| U.S. States With Double Letters | 0 | - | 4.65 | 23,058 |
| U.S. States Bigger than Their Neighbors | 0 | - | 4.27 | 74,469 |
| States and Provinces that touch the Rocky Mountains | 0 | - | 4.42 | 32,112 |
| Name a Valid U.S. State #2 | 0 | - | 4.62 | 74,441 |
| Name a Valid U.S. State #3 | 0 | - | 4.78 | 47,106 |
| 50 States, 50 Cities - Easy Version | 0 | - | 4.39 | 125,754 |
| Top 10 Least-Forested U.S. States | 0 | - | 4.50 | 45,241 |
| Famous Canadians by Picture | 0 | - | 4.39 | 47,895 |
| European Secessionist Movements on a Map | 0 | - | 4.52 | 33,735 |
| The Only American Country ... | 0 | - | 4.92 | 116,834 |
| American Countries with the Shortest Names | 0 | - | 4.96 | 107,170 |
| U.S. State Border Crossings | 0 | - | 4.96 | 87,359 |
| U.S. Cities with the Most International Tourists | 0 | - | 4.88 | 71,751 |
| Name a Valid U.S. President #1 | 0 | - | 4.88 | 182,678 |
| Cities and Towns of Massachusetts | 0 | - | 4.92 | 69,785 |
| Who Did that Motown Song | 0 | - | 4.46 | 12,915 |
| Regions of US States | 0 | - | 4.16 | 32,287 |
| States, Provinces & Territories that Touch the Appalachian Mountains | 0 | - | 4.59 | 20,156 |
| U.S. States with the Lowest HDI | 0 | - | 4.46 | 28,376 |
| Which U.S. State - Multiple Choice | 0 | - | 4.48 | 19,852 |
| Movies by State Quiz | 0 | - | 4.24 | 40,111 |
| U.S. States with the Fewest Traffic Fatalities | 0 | - | 4.21 | 20,603 |
| U.S. States with the Most Traffic Fatalities | 0 | - | 4.08 | 18,650 |
| Canada Country Quiz | 0 | - | 4.53 | 128,227 |
| Canada Cities Map Quiz | 0 | - | 4.63 | 121,075 |
| Canada A-Z | 0 | - | 4.70 | 31,970 |
| Catholic Countries in Europe | 0 | - | 4.83 | 90,888 |
| Monarchies of Europe | 0 | - | 4.89 | 94,076 |
| Monarchies of Asia | 0 | - | 4.96 | 68,786 |
| Top 10 Biggest Economies in Africa | 0 | - | 4.99 | 117,007 |
| Mexico Country Quiz | 0 | - | 4.49 | 70,094 |
| Mexico Cities Map Quiz | 0 | - | 4.75 | 32,488 |
| All First-Level Subdivisions of South America on a Map | 0 | - | 4.90 | 48,291 |
| Brazil States Map Quiz | 0 | - | 4.84 | 44,810 |
| States of Brazil | 0 | - | 4.98 | 80,084 |
| Fictional Characters from the Midwest by Picture | 0 | - | 4.06 | 18,967 |
| U.S. States by Picture #1 | 0 | - | 4.17 | 15,028 |
| U.S. Cities with the Highest Murder Rate | 0 | - | 4.54 | 135,248 |
| Most-Visited U.S. Cities | 0 | - | 4.88 | 85,662 |
| Every U.S. Metro Area on a Map | 0 | - | 4.96 | 76,405 |
| Geography of California | 0 | - | 4.23 | 10,217 |
| California Pro Sport Teams | 0 | - | 4.23 | 22,490 |
| Chicago City Trivia | 0 | - | 4.29 | 31,056 |
| New York Pro Sport Teams | 0 | - | 4.32 | 25,437 |
| Countries Larger Than Texas but With Fewer People | 0 | - | 4.89 | 25,789 |
| Texas Pro Sport Teams | 0 | - | 4.18 | 16,583 |
| History of Pennsylvania | 0 | - | 4.14 | 6,913 |
| History of Virginia | 0 | - | 4.34 | 11,376 |
| Washington State by Picture | 0 | - | 4.24 | 7,506 |
| Events in U.S. History | 0 | - | 4.40 | 27,709 |
| Events by U.S. State #1 | 0 | - | 4.42 | 22,524 |
| Most Valuable Crops by U.S. State | 0 | - | 4.40 | 38,255 |
| U.S. States with the Most Venomous Snake Species | 0 | - | 4.47 | 25,920 |
| U.S. States with the Most Endangered Species | 0 | - | 4.50 | 14,179 |
