| U.S. Cabinet Departments | 0 | - | 4.86 | 70,671 |
| U.S. Federal Agency Acronyms | 0 | - | 4.50 | 78,478 |
| Deadliest U.S. Wars | 0 | - | 4.89 | 183,611 |
| U.S. States by Governor Quiz | 0 | - | 4.42 | 17,537 |
| U.S. Political Parties in History | 0 | - | 4.44 | 27,017 |
| U.S. Government Agencies | 0 | - | 4.44 | 18,813 |
| US States Quiz | 0 | - | 5.00 | 15,891,198 |
| U.S. National Parks Quiz | 0 | - | 4.81 | 51,035 |
| Total United States Immigration by Country | 0 | - | 4.89 | 104,619 |
| Most Common U.S. Last Names - Extreme | 0 | - | 4.95 | 166,668 |
| "Do Not Travel" Countries for U.S. Citizens | 0 | - | 4.95 | 202,303 |
| Top 10 Non-English Languages Spoken in New York City | 0 | - | 4.83 | 62,026 |
| States of the U.S. in Alphabetical Order | 0 | - | 4.98 | 356,227 |
| Top 10 Coldest U.S. States | 0 | - | 4.94 | 117,780 |
| Top 10 Hottest U.S. States | 0 | - | 4.86 | 119,362 |
| Top 10 U.S. States with the Least Precipitation | 0 | - | 4.81 | 59,781 |
| The U.S. Government - How Does it Work? | 0 | - | 4.34 | 41,326 |
| Pixelated United States Map | 0 | - | 4.89 | 88,907 |
| Most-Visited Countries by Americans | 0 | - | 4.87 | 102,063 |
| Countries that Visit the United States the Most | 0 | - | 4.95 | 85,789 |
| The 13 Colonies Quiz | 0 | - | 4.97 | 110,550 |
| U.S. States with the Letter Y | 0 | - | 4.84 | 105,066 |
| 10 Southernmost U.S. States | 0 | - | 4.88 | 107,237 |
| U.S. States with Short Names | 0 | - | 4.90 | 140,914 |
| U.S. States that Start with M | 0 | - | 4.92 | 178,627 |
| U.S. States By Population | 0 | - | 4.90 | 137,299 |
| U.S. States that Start with N | 0 | - | 4.94 | 164,740 |
| U.S. States with Longest Names | 0 | - | 4.86 | 40,762 |
| U.S. States with a Unique First Letter | 0 | - | 4.95 | 83,730 |
| 10 Westernmost U.S. States | 0 | - | 4.95 | 61,554 |
| The Only Remaining U.S. State . . . | 0 | - | 4.94 | 61,168 |
| US States with an Empty Map | 0 | - | 5.00 | 593,846 |
| 10 Longest Rivers in the United States | 0 | - | 4.85 | 37,232 |
| All 3,143 Counties of the United States on a Map | 0 | - | 4.96 | 307,658 |
| Countries Closest to United States by Continent | 0 | - | 4.99 | 140,348 |
| Countries that Beat the United States | 0 | - | 4.93 | 158,249 |
| Senators Who Ran For President | 0 | - | 4.28 | 16,726 |
| U.S. Electoral College Landslides | 0 | - | 4.33 | 21,596 |
| Louisiana Purchase with a Map | 0 | - | 4.96 | 42,411 |
| Top 10 Most-Visited U.S. States | 0 | - | 4.90 | 96,500 |
| U.S. States with the Most Immigrants | 0 | - | 4.84 | 78,560 |
| U.S. States or European Countries by Area | 0 | - | 4.95 | 88,018 |
| U.S. States or European Countries by Population | 0 | - | 4.98 | 124,893 |
| Name a Valid U.S. State #1 | 0 | - | 4.93 | 198,142 |
| Top 10 Most Native American U.S. States | 0 | - | 4.85 | 86,401 |
| U.S. Citizenship Test Questions | 0 | - | 4.84 | 231,998 |
| U.S. Political Figures by Picture #1 | 0 | - | 4.13 | 25,676 |
| U.S. Political Figures by Picture #2 | 0 | - | 4.10 | 15,150 |
| Female Political Figures by Picture - U.S. | 0 | - | 4.19 | 10,517 |
| Canadian Prime Ministers Quiz | 0 | - | 4.63 | 54,193 |
| Top 10 Biggest Economies in the Americas | 0 | - | 4.93 | 87,276 |
| States of Mexico | 0 | - | 4.93 | 158,296 |
| Mexico States Map Quiz | 0 | - | 4.81 | 98,088 |
| Top U.S. Universities | 0 | - | 4.14 | 137,445 |
| 10 U.S. States With The Lowest Murder Rates | 0 | - | 4.48 | 35,970 |
| Biggest Trading Partners - US | 0 | - | 4.63 | 104,603 |
| 10 U.S. States With The Highest Murder Rates | 0 | - | 4.44 | 48,790 |
| U.S. State Superlatives #1 | 0 | - | 4.46 | 77,240 |
| U.S. State Superlatives #2 | 0 | - | 4.53 | 38,773 |
| Top 10 U.S. States With the Most Tornadoes | 0 | - | 4.53 | 62,884 |
| Top 10 Least Religious U.S. States | 0 | - | 4.50 | 33,005 |
| Top 10 U.S. States by Public Transit | 0 | - | 4.78 | 61,538 |
| Top 10 U.S. States with the Most Precipitation | 0 | - | 4.46 | 40,739 |
| Top 10 Richest Countries in the Americas | 0 | - | 4.89 | 73,572 |
| U.S. State Nicknames Quiz | 0 | - | 4.49 | 48,591 |
| Countries with American Expatriates | 0 | - | 4.55 | 41,872 |
| United States Landmarks Map Quiz | 0 | - | 4.55 | 39,419 |
| United States Country Quiz | 0 | - | 4.45 | 96,074 |
| Busiest Air Routes from the U.S. | 0 | - | 4.47 | 75,232 |
| Politicians with Other Careers Quiz | 0 | - | 3.98 | 14,800 |
| Main Parts of the U.S. Budget | 0 | - | 3.49 | 8,444 |
| U.S. Presidents Quiz | 0 | - | 5.00 | 3,454,704 |
| 100 Most Influential Figures in U.S. History | 0 | - | 4.19 | 43,473 |
| Countries Closest to Canada | 0 | - | 4.90 | 192,157 |
| Asian Countries Americans Travel to the Most | 0 | - | 4.74 | 58,035 |
| U.S. Geography by Letter - B | 0 | - | 4.51 | 63,600 |
| U.S. Geography by Letter - S | 0 | - | 4.53 | 48,592 |
| Two Letter U.S. State Abbreviations | 0 | - | 4.19 | 725,537 |
| Most Guessed U.S. Cities | 0 | - | 4.88 | 99,137 |
| U.S. Cities with the Biggest Economies | 0 | - | 4.83 | 67,830 |
| Children of U.S. Presidents | 0 | - | 3.95 | 16,481 |
| Top 10 Non-English Languages of Los Angeles | 0 | - | 4.42 | 58,078 |
| 10 Closest Megacities to New York City | 0 | - | 4.52 | 66,235 |
| New England States | 0 | - | 4.51 | 59,093 |
| US States by Land Area | 0 | - | 4.63 | 50,882 |
| Top 10 U.S. States by Inland Water Area | 0 | - | 4.53 | 37,323 |
| Add a Letter - Make a U.S. State | 0 | - | 4.71 | 80,083 |
| Top 10 Widest U.S. States East to West | 0 | - | 4.69 | 53,834 |
| Top 10 Tallest U.S. States North to South | 0 | - | 4.78 | 39,332 |
| U.S. States by Borders | 0 | - | 4.61 | 33,979 |
| U.S. States by Wikipedia Descriptions #1 | 0 | - | 4.57 | 38,525 |
| U.S. States by Wikipedia Descriptions #2 | 0 | - | 4.47 | 36,360 |
| 10 Easternmost U.S. States | 0 | - | 4.55 | 54,919 |
| The Only U.S. State ... #1 | 0 | - | 4.52 | 85,463 |
| 50 States, 50 Cities - Hard Version | 0 | - | 4.46 | 42,635 |
| Top 10 Richest U.S. States by Median Income | 0 | - | 4.48 | 115,965 |
| Famous Canadians by Picture | 0 | - | 4.42 | 47,021 |
| Asian Last Names in the United States | 0 | - | 4.43 | 45,320 |
| United States Map Quiz | 0 | - | 4.98 | 4,057,033 |
| U.S. Bill of Rights | 0 | - | 4.53 | 31,798 |
| U.S. License Plates Picture Quiz | 0 | - | 4.61 | 51,229 |
| U.S. States with the Fewest Immigrants | 0 | - | 4.64 | 63,310 |
| U.S. States with the Highest Percentage of Farmland | 0 | - | 4.74 | 55,431 |
| U.S. States with the Lowest Percentage of Farmland | 0 | - | 4.74 | 54,204 |
| U.S. States with the Longest International Borders | 0 | - | 4.77 | 44,541 |
| Longest U.S. State Borders | 0 | - | 4.64 | 37,329 |
| Top 10 U.S. States with the Highest Elevation | 0 | - | 4.51 | 67,125 |
| 10 U.S. States with the Highest Tax Burden | 0 | - | 4.26 | 36,902 |
| Top 10 U.S. States by Manufacturing Employment | 0 | - | 4.51 | 28,287 |
| U.S. States with the Lowest Average Elevation | 0 | - | 4.55 | 37,777 |
| U.S. States With the Highest Average Elevation | 0 | - | 4.61 | 32,134 |
| U.S. States with the Fewest Borders | 0 | - | 4.77 | 110,347 |
| U.S. States with the Most Borders | 0 | - | 4.53 | 61,808 |
| U.S. States With No City Over 100,000 | 0 | - | 4.56 | 16,942 |
| Flags of North and South America Quiz | 0 | - | 4.99 | 335,666 |
| Belize Country Quiz | 0 | - | 4.87 | 19,996 |
| Largest United States Airlines | 0 | - | 4.38 | 53,583 |
| Third Most Common Language by U.S. State | 0 | - | 4.90 | 111,295 |
| U.S. Five-Star Generals and Admirals | 0 | - | 4.34 | 8,156 |
| Countries Closest to United States A-Z | 0 | - | 4.83 | 113,178 |
| All U.S. Supreme Court Justices | 0 | - | 4.51 | 28,224 |
| All U.S. Supreme Court Justices Ever | 0 | - | 4.43 | 11,185 |
| U.S. Presidents by Picture | 0 | - | 4.85 | 411,830 |
| Florida Pro Sport Teams | 0 | - | 4.68 | 11,176 |
| Georgia ... or Georgia? | 0 | - | 4.69 | 74,698 |
| U.S. Geography by Letter - C | 0 | - | 4.21 | 62,771 |
| U.S. Geography by Letter - A | 0 | - | 4.33 | 57,727 |
| U.S. Geography by Letter - D | 0 | - | 4.03 | 46,573 |
| U.S. Geography by Letter - T | 0 | - | 4.27 | 45,707 |
| U.S. Geography by Letter - P | 0 | - | 4.32 | 43,723 |
| U.S. Geography by Letter - M | 0 | - | 4.19 | 42,873 |
| American Legal Vocabulary | 0 | - | 4.40 | 33,108 |
| U.S. Cities by Picture #1 | 0 | - | 4.37 | 33,357 |
| Cities by Picture #2 | 0 | - | 4.18 | 33,999 |
| Countries Closest to the U. S. | 0 | - | 4.40 | 202,917 |
| American Political Words | 0 | - | 4.39 | 22,948 |
| First Names of U.S. Presidents | 0 | - | 4.85 | 370,031 |
| Famous People from California by Picture | 0 | - | 4.29 | 34,527 |
| California Groups of Things | 0 | - | 4.24 | 44,408 |
| Hawaiian Islands Map Quiz | 0 | - | 4.75 | 21,840 |
| New York Groups of Things | 0 | - | 4.36 | 58,974 |
| Famous People from Texas by Picture | 0 | - | 4.03 | 32,668 |
| People on Money - United States | 0 | - | 4.32 | 62,639 |
| U.S. History Groups of Two | 0 | - | 4.22 | 43,306 |
| Last 10 U.S. States Alphabetically | 0 | - | 4.35 | 73,182 |
| Top 10 Least Populous U.S. State Capitals | 0 | - | 4.50 | 21,117 |
| Flyover States | 0 | - | 4.52 | 28,838 |
| U.S. States With Double Letters | 0 | - | 4.65 | 22,757 |
| U.S. States Bigger than Their Neighbors | 0 | - | 4.26 | 74,135 |
| States and Provinces that touch the Rocky Mountains | 0 | - | 4.42 | 32,031 |
| Name a Valid U.S. State #2 | 0 | - | 4.62 | 73,886 |
| Name a Valid U.S. State #3 | 0 | - | 4.78 | 46,756 |
| 50 States, 50 Cities - Easy Version | 0 | - | 4.39 | 124,993 |
| Top 10 Least-Forested U.S. States | 0 | - | 4.49 | 45,048 |
| European Secessionist Movements on a Map | 0 | - | 4.53 | 33,448 |
| The Only American Country ... | 0 | - | 4.92 | 115,959 |
| American Countries with the Shortest Names | 0 | - | 4.96 | 106,524 |
| U.S. State Border Crossings | 0 | - | 4.96 | 86,727 |
| U.S. Cities with the Most International Tourists | 0 | - | 4.87 | 71,005 |
| Name a Valid U.S. President #1 | 0 | - | 4.90 | 180,930 |
| Cities and Towns of Massachusetts | 0 | - | 4.90 | 68,649 |
| Who Did that Motown Song | 0 | - | 4.46 | 12,886 |
| Regions of US States | 0 | - | 4.16 | 32,200 |
| States, Provinces & Territories that Touch the Appalachian Mountains | 0 | - | 4.59 | 20,108 |
| U.S. States with the Lowest HDI | 0 | - | 4.46 | 28,270 |
| Which U.S. State - Multiple Choice | 0 | - | 4.48 | 19,773 |
| Movies by State Quiz | 0 | - | 4.24 | 40,025 |
| U.S. States with the Fewest Traffic Fatalities | 0 | - | 4.21 | 20,484 |
| U.S. States with the Most Traffic Fatalities | 0 | - | 4.08 | 18,552 |
| Canada Country Quiz | 0 | - | 4.53 | 127,511 |
| Canada Cities Map Quiz | 0 | - | 4.69 | 119,679 |
| Canada A-Z | 0 | - | 4.70 | 31,795 |
| Catholic Countries in Europe | 0 | - | 4.83 | 90,038 |
| Monarchies of Europe | 0 | - | 4.89 | 93,335 |
| Monarchies of Asia | 0 | - | 4.96 | 68,210 |
| Top 10 Biggest Economies in Africa | 0 | - | 4.99 | 116,399 |
| Mexico Country Quiz | 0 | - | 4.48 | 69,667 |
| Mexico Cities Map Quiz | 0 | - | 4.75 | 32,286 |
| All First-Level Subdivisions of South America on a Map | 0 | - | 4.90 | 47,130 |
| Brazil States Map Quiz | 0 | - | 4.84 | 44,253 |
| States of Brazil | 0 | - | 4.98 | 78,604 |
| Fictional Characters from the Midwest by Picture | 0 | - | 4.06 | 18,922 |
| U.S. States by Picture #1 | 0 | - | 4.17 | 14,946 |
| U.S. Cities with the Highest Murder Rate | 0 | - | 4.54 | 134,833 |
| Most-Visited U.S. Cities | 0 | - | 4.88 | 83,970 |
| Every U.S. Metro Area on a Map | 0 | - | 4.96 | 72,312 |
| Geography of California | 0 | - | 4.23 | 10,163 |
| California Pro Sport Teams | 0 | - | 4.23 | 22,440 |
| Chicago City Trivia | 0 | - | 4.29 | 30,975 |
| New York Pro Sport Teams | 0 | - | 4.32 | 25,339 |
| Countries Larger Than Texas but With Fewer People | 0 | - | 4.89 | 25,385 |
| Texas Pro Sport Teams | 0 | - | 4.14 | 16,524 |
| History of Pennsylvania | 0 | - | 4.14 | 6,871 |
| History of Virginia | 0 | - | 4.34 | 11,334 |
| Washington State by Picture | 0 | - | 4.24 | 7,439 |
| Events in U.S. History | 0 | - | 4.39 | 27,456 |
| Events by U.S. State #1 | 0 | - | 4.42 | 22,438 |
| Most Valuable Crops by U.S. State | 0 | - | 4.40 | 38,061 |
| U.S. States with the Most Venomous Snake Species | 0 | - | 4.47 | 25,817 |
| U.S. States with the Most Endangered Species | 0 | - | 4.50 | 14,139 |
