| U.S. Cabinet Departments | 0 | - | 4.85 | 70,115 |
| U.S. Federal Agency Acronyms | 0 | - | 4.50 | 78,108 |
| Deadliest U.S. Wars | 0 | - | 4.84 | 165,612 |
| U.S. States by Governor Quiz | 0 | - | 4.42 | 17,440 |
| U.S. Political Parties in History | 0 | - | 4.43 | 26,868 |
| U.S. Government Agencies | 0 | - | 4.44 | 18,600 |
| US States Quiz | 0 | - | 5.00 | 15,698,995 |
| Total United States Immigration by Country | 0 | - | 4.88 | 103,287 |
| Most Common U.S. Last Names - Extreme | 0 | - | 4.95 | 164,968 |
| "Do Not Travel" Countries for U.S. Citizens | 0 | - | 4.94 | 200,200 |
| Top 10 Non-English Languages Spoken in New York City | 0 | - | 4.83 | 61,253 |
| States of the U.S. in Alphabetical Order | 0 | - | 4.97 | 353,939 |
| Top 10 Coldest U.S. States | 0 | - | 4.92 | 106,722 |
| Top 10 Hottest U.S. States | 0 | - | 4.85 | 117,084 |
| Top 10 U.S. States with the Least Precipitation | 0 | - | 4.83 | 59,106 |
| The U.S. Government - How Does it Work? | 0 | - | 4.34 | 41,107 |
| Pixelated United States Map | 0 | - | 4.90 | 87,451 |
| Most-Visited Countries by Americans | 0 | - | 4.86 | 100,751 |
| Countries that Visit the United States the Most | 0 | - | 4.95 | 84,701 |
| The 13 Colonies Quiz | 0 | - | 4.97 | 108,730 |
| U.S. States with the Letter Y | 0 | - | 4.85 | 103,589 |
| 10 Southernmost U.S. States | 0 | - | 4.87 | 105,854 |
| U.S. States with Short Names | 0 | - | 4.89 | 139,164 |
| U.S. States that Start with M | 0 | - | 4.92 | 176,956 |
| U.S. States By Population | 0 | - | 4.90 | 136,188 |
| U.S. States that Start with N | 0 | - | 4.94 | 163,205 |
| U.S. States with Longest Names | 0 | - | 4.87 | 39,978 |
| 10 Westernmost U.S. States | 0 | - | 4.95 | 61,033 |
| The Only Remaining U.S. State . . . | 0 | - | 4.94 | 60,352 |
| US States with an Empty Map | 0 | - | 5.00 | 586,912 |
| 10 Longest Rivers in the United States | 0 | - | 4.84 | 36,824 |
| All 3,143 Counties of the United States on a Map | 0 | - | 4.96 | 302,783 |
| Countries Closest to United States by Continent | 0 | - | 4.99 | 139,283 |
| Countries that Beat the United States | 0 | - | 4.92 | 156,482 |
| Senators Who Ran For President | 0 | - | 4.28 | 16,650 |
| U.S. Electoral College Landslides | 0 | - | 4.32 | 21,488 |
| Louisiana Purchase with a Map | 0 | - | 4.96 | 41,266 |
| Top 10 Most-Visited U.S. States | 0 | - | 4.90 | 95,512 |
| U.S. States with the Most Immigrants | 0 | - | 4.84 | 77,830 |
| U.S. States or European Countries by Area | 0 | - | 4.95 | 86,456 |
| U.S. States or European Countries by Population | 0 | - | 4.97 | 123,031 |
| Name a Valid U.S. State #1 | 0 | - | 4.95 | 195,538 |
| Top 10 Most Native American U.S. States | 0 | - | 4.87 | 77,113 |
| U.S. Citizenship Test Questions | 0 | - | 4.84 | 230,129 |
| U.S. Political Figures by Picture #1 | 0 | - | 4.13 | 25,555 |
| U.S. Political Figures by Picture #2 | 0 | - | 4.10 | 15,076 |
| Female Political Figures by Picture - U.S. | 0 | - | 4.19 | 10,436 |
| Canadian Prime Ministers Quiz | 0 | - | 4.63 | 53,453 |
| Top 10 Biggest Economies in the Americas | 0 | - | 4.93 | 86,551 |
| States of Mexico | 0 | - | 4.93 | 155,693 |
| Mexico States Map Quiz | 0 | - | 4.81 | 96,951 |
| Top U.S. Universities | 0 | - | 4.14 | 135,924 |
| 10 U.S. States With The Lowest Murder Rates | 0 | - | 4.48 | 35,606 |
| Biggest Trading Partners - US | 0 | - | 4.63 | 104,280 |
| 10 U.S. States With The Highest Murder Rates | 0 | - | 4.44 | 48,566 |
| U.S. State Superlatives #1 | 0 | - | 4.46 | 76,979 |
| U.S. State Superlatives #2 | 0 | - | 4.53 | 38,558 |
| Top 10 U.S. States With the Most Tornadoes | 0 | - | 4.53 | 62,441 |
| Top 10 Least Religious U.S. States | 0 | - | 4.50 | 32,668 |
| Top 10 U.S. States by Public Transit | 0 | - | 4.78 | 60,988 |
| Top 10 U.S. States with the Most Precipitation | 0 | - | 4.46 | 40,496 |
| Top 10 Richest Countries in the Americas | 0 | - | 4.89 | 72,958 |
| U.S. State Nicknames Quiz | 0 | - | 4.49 | 48,176 |
| U.S. National Parks Quiz | 0 | - | 4.80 | 50,178 |
| Countries with American Expatriates | 0 | - | 4.55 | 41,707 |
| United States Landmarks Map Quiz | 0 | - | 4.55 | 39,277 |
| United States Country Quiz | 0 | - | 4.45 | 95,081 |
| Busiest Air Routes from the U.S. | 0 | - | 4.47 | 74,877 |
| Politicians with Other Careers Quiz | 0 | - | 3.98 | 14,759 |
| Main Parts of the U.S. Budget | 0 | - | 3.53 | 8,387 |
| U.S. Presidents Quiz | 0 | - | 5.00 | 3,405,734 |
| 100 Most Influential Figures in U.S. History | 0 | - | 4.19 | 42,890 |
| Countries Closest to Canada | 0 | - | 4.90 | 190,926 |
| Asian Countries Americans Travel to the Most | 0 | - | 4.74 | 57,630 |
| U.S. Geography by Letter - B | 0 | - | 4.49 | 56,415 |
| U.S. Geography by Letter - S | 0 | - | 4.53 | 47,609 |
| Two Letter U.S. State Abbreviations | 0 | - | 4.19 | 721,592 |
| Most Guessed U.S. Cities | 0 | - | 4.89 | 97,954 |
| U.S. Cities with the Biggest Economies | 0 | - | 4.83 | 66,787 |
| American Political Words | 0 | - | 4.41 | 22,837 |
| Children of U.S. Presidents | 0 | - | 3.95 | 16,431 |
| Top 10 Non-English Languages of Los Angeles | 0 | - | 4.42 | 57,725 |
| 10 Closest Megacities to New York City | 0 | - | 4.52 | 66,039 |
| New England States | 0 | - | 4.52 | 53,143 |
| US States by Land Area | 0 | - | 4.63 | 50,466 |
| Top 10 U.S. States by Inland Water Area | 0 | - | 4.52 | 37,173 |
| Add a Letter - Make a U.S. State | 0 | - | 4.73 | 79,525 |
| Top 10 Widest U.S. States East to West | 0 | - | 4.70 | 53,377 |
| Top 10 Tallest U.S. States North to South | 0 | - | 4.77 | 38,999 |
| U.S. States by Borders | 0 | - | 4.59 | 33,670 |
| U.S. States by Wikipedia Descriptions #1 | 0 | - | 4.57 | 38,347 |
| U.S. States by Wikipedia Descriptions #2 | 0 | - | 4.47 | 36,207 |
| 10 Easternmost U.S. States | 0 | - | 4.55 | 54,619 |
| The Only U.S. State ... #1 | 0 | - | 4.52 | 85,010 |
| 50 States, 50 Cities - Hard Version | 0 | - | 4.49 | 42,264 |
| Top 10 Richest U.S. States by Median Income | 0 | - | 4.47 | 115,122 |
| Asian Last Names in the United States | 0 | - | 4.43 | 45,051 |
| United States Map Quiz | 0 | - | 4.98 | 4,034,560 |
| U.S. Bill of Rights | 0 | - | 4.53 | 31,682 |
| U.S. License Plates Picture Quiz | 0 | - | 4.61 | 50,862 |
| U.S. States with the Fewest Immigrants | 0 | - | 4.64 | 62,789 |
| U.S. States with the Highest Percentage of Farmland | 0 | - | 4.74 | 55,212 |
| U.S. States with the Lowest Percentage of Farmland | 0 | - | 4.75 | 54,006 |
| U.S. States with the Longest International Borders | 0 | - | 4.77 | 44,264 |
| Longest U.S. State Borders | 0 | - | 4.62 | 36,828 |
| Top 10 U.S. States with the Highest Elevation | 0 | - | 4.51 | 66,941 |
| 10 U.S. States with the Highest Tax Burden | 0 | - | 4.26 | 36,616 |
| Top 10 U.S. States by Manufacturing Employment | 0 | - | 4.51 | 28,189 |
| U.S. States with the Lowest Average Elevation | 0 | - | 4.54 | 32,465 |
| U.S. States With the Highest Average Elevation | 0 | - | 4.61 | 31,826 |
| U.S. States with the Fewest Borders | 0 | - | 4.75 | 109,600 |
| U.S. States with the Most Borders | 0 | - | 4.55 | 61,706 |
| U.S. States With No City Over 100,000 | 0 | - | 4.62 | 16,475 |
| Flags of North and South America Quiz | 0 | - | 4.99 | 331,577 |
| Belize Country Quiz | 0 | - | 4.87 | 19,816 |
| Largest United States Airlines | 0 | - | 4.38 | 53,369 |
| Third Most Common Language by U.S. State | 0 | - | 4.90 | 110,639 |
| U.S. Five-Star Generals and Admirals | 0 | - | 4.35 | 8,079 |
| Countries Closest to United States A-Z | 0 | - | 4.83 | 112,405 |
| All U.S. Supreme Court Justices | 0 | - | 4.49 | 28,002 |
| All U.S. Supreme Court Justices Ever | 0 | - | 4.41 | 11,076 |
| U.S. Presidents by Picture | 0 | - | 4.85 | 409,105 |
| Florida Pro Sport Teams | 0 | - | 4.67 | 11,038 |
| Georgia ... or Georgia? | 0 | - | 4.69 | 74,325 |
| U.S. Geography by Letter - C | 0 | - | 4.21 | 61,174 |
| U.S. Geography by Letter - A | 0 | - | 4.32 | 48,977 |
| U.S. Geography by Letter - D | 0 | - | 4.02 | 45,173 |
| U.S. Geography by Letter - T | 0 | - | 4.25 | 44,685 |
| U.S. Geography by Letter - P | 0 | - | 4.31 | 42,661 |
| U.S. Geography by Letter - M | 0 | - | 4.19 | 41,945 |
| American Legal Vocabulary | 0 | - | 4.40 | 32,966 |
| U.S. Cities by Picture #1 | 0 | - | 4.37 | 33,107 |
| Cities by Picture #2 | 0 | - | 4.22 | 33,744 |
| Countries Closest to the U. S. | 0 | - | 4.40 | 202,229 |
| First Names of U.S. Presidents | 0 | - | 4.85 | 367,663 |
| Famous People from California by Picture | 0 | - | 4.29 | 34,111 |
| California Groups of Things | 0 | - | 4.24 | 44,189 |
| Hawaiian Islands Map Quiz | 0 | - | 4.75 | 21,744 |
| New York Groups of Things | 0 | - | 4.39 | 58,704 |
| Famous People from Texas by Picture | 0 | - | 4.03 | 32,505 |
| People on Money - United States | 0 | - | 4.32 | 62,528 |
| U.S. History Groups of Two | 0 | - | 4.22 | 43,097 |
| Last 10 U.S. States Alphabetically | 0 | - | 4.34 | 72,842 |
| Top 10 Least Populous U.S. State Capitals | 0 | - | 4.50 | 21,049 |
| Flyover States | 0 | - | 4.51 | 28,722 |
| U.S. States With Double Letters | 0 | - | 4.65 | 22,481 |
| U.S. States Bigger than Their Neighbors | 0 | - | 4.28 | 73,742 |
| States and Provinces that touch the Rocky Mountains | 0 | - | 4.42 | 31,918 |
| Name a Valid U.S. State #2 | 0 | - | 4.62 | 73,054 |
| 50 States, 50 Cities - Easy Version | 0 | - | 4.38 | 124,172 |
| Top 10 Least-Forested U.S. States | 0 | - | 4.49 | 44,801 |
| Famous Canadians by Picture | 0 | - | 4.47 | 30,322 |
| European Secessionist Movements on a Map | 0 | - | 4.52 | 33,102 |
| The Only American Country ... | 0 | - | 4.93 | 114,966 |
| American Countries with the Shortest Names | 0 | - | 4.96 | 105,518 |
| U.S. State Border Crossings | 0 | - | 4.96 | 85,785 |
| U.S. Cities with the Most International Tourists | 0 | - | 4.86 | 69,919 |
| Name a Valid U.S. President #1 | 0 | - | 4.90 | 178,633 |
| Cities and Towns of Massachusetts | 0 | - | 4.92 | 67,586 |
| Who Did that Motown Song | 0 | - | 4.46 | 12,851 |
| Regions of US States | 0 | - | 4.16 | 32,097 |
| States, Provinces & Territories that Touch the Appalachian Mountains | 0 | - | 4.59 | 20,048 |
| U.S. States with the Lowest HDI | 0 | - | 4.46 | 28,155 |
| Which U.S. State - Multiple Choice | 0 | - | 4.47 | 19,669 |
| Movies by State Quiz | 0 | - | 4.24 | 39,953 |
| U.S. States with the Fewest Traffic Fatalities | 0 | - | 4.21 | 20,316 |
| U.S. States with the Most Traffic Fatalities | 0 | - | 4.08 | 18,432 |
| Canada Country Quiz | 0 | - | 4.53 | 126,639 |
| Canada Cities Map Quiz | 0 | - | 4.53 | 112,673 |
| Catholic Countries in Europe | 0 | - | 4.83 | 89,060 |
| Monarchies of Europe | 0 | - | 4.89 | 92,398 |
| Monarchies of Asia | 0 | - | 4.96 | 67,673 |
| Top 10 Biggest Economies in Africa | 0 | - | 4.99 | 115,273 |
| Mexico Country Quiz | 0 | - | 4.48 | 69,234 |
| Mexico Cities Map Quiz | 0 | - | 4.75 | 32,081 |
| All First-Level Subdivisions of South America on a Map | 0 | - | 4.89 | 45,942 |
| Brazil States Map Quiz | 0 | - | 4.84 | 43,704 |
| States of Brazil | 0 | - | 4.97 | 77,114 |
| Fictional Characters from the Midwest by Picture | 0 | - | 4.06 | 18,852 |
| U.S. States by Picture #1 | 0 | - | 4.17 | 14,844 |
| U.S. Cities with the Highest Murder Rate | 0 | - | 4.55 | 134,312 |
| Most-Visited U.S. Cities | 0 | - | 4.87 | 82,109 |
| Every U.S. Metro Area on a Map | 0 | - | 4.97 | 69,350 |
| Geography of California | 0 | - | 4.23 | 10,097 |
| California Pro Sport Teams | 0 | - | 4.23 | 22,384 |
| Chicago City Trivia | 0 | - | 4.27 | 30,893 |
| New York Pro Sport Teams | 0 | - | 4.31 | 25,237 |
| Countries Larger Than Texas but With Fewer People | 0 | - | 4.89 | 24,793 |
| Texas Pro Sport Teams | 0 | - | 4.14 | 16,472 |
| History of Pennsylvania | 0 | - | 4.11 | 6,812 |
| History of Virginia | 0 | - | 4.34 | 11,283 |
| Washington State by Picture | 0 | - | 4.24 | 7,396 |
| Events in U.S. History | 0 | - | 4.39 | 27,228 |
| Events by U.S. State #1 | 0 | - | 4.42 | 22,345 |
| Most Valuable Crops by U.S. State | 0 | - | 4.40 | 37,867 |
| U.S. States with the Most Venomous Snake Species | 0 | - | 4.47 | 25,705 |
| U.S. States with the Most Endangered Species | 0 | - | 4.50 | 14,087 |
| African-American Historical Figures | 0 | - | 4.18 | 16,729 |
| Capitals of Canadian Provinces | 0 | - | 4.86 | 83,047 |
| Most-Visited Countries by Canadians | 0 | - | 4.77 | 38,542 |
