| U.S. Cabinet Departments | 0 | - | 4.85 | 67,294 |
| U.S. Federal Agency Acronyms | 0 | - | 4.51 | 75,652 |
| Deadliest U.S. Wars | 0 | - | 4.82 | 156,937 |
| U.S. States by Governor Quiz | 0 | - | 4.42 | 16,889 |
| U.S. Political Parties in History | 0 | - | 4.42 | 26,049 |
| U.S. Government Agencies | 0 | - | 4.41 | 17,506 |
| US States Quiz | 0 | - | 5.00 | 14,583,176 |
| Asian Countries Americans Travel to the Most | 0 | - | 4.84 | 54,106 |
| Total United States Immigration by Country | 0 | - | 4.90 | 95,927 |
| Most Common U.S. Last Names - Extreme | 0 | - | 4.93 | 145,207 |
| "Do Not Travel" Countries for U.S. Citizens | 0 | - | 4.95 | 182,195 |
| States of the U.S. in Alphabetical Order | 0 | - | 4.97 | 338,363 |
| Top 10 Coldest U.S. States | 0 | - | 4.91 | 99,345 |
| Top 10 Hottest U.S. States | 0 | - | 4.86 | 99,912 |
| Top 10 U.S. States with the Least Precipitation | 0 | - | 4.82 | 56,905 |
| The U.S. Government - How Does it Work? | 0 | - | 4.33 | 39,662 |
| Pixelated United States Map | 0 | - | 4.91 | 81,330 |
| Most-Visited Countries by Americans | 0 | - | 4.86 | 92,053 |
| Countries that Visit the United States the Most | 0 | - | 4.95 | 77,644 |
| The 13 Colonies Quiz | 0 | - | 4.97 | 99,445 |
| U.S. States with the Letter Y | 0 | - | 4.86 | 95,135 |
| 10 Southernmost U.S. States | 0 | - | 4.84 | 98,228 |
| U.S. States with Short Names | 0 | - | 4.87 | 128,379 |
| U.S. States that Start with M | 0 | - | 4.91 | 149,226 |
| U.S. States By Population | 0 | - | 4.90 | 129,241 |
| U.S. States that Start with N | 0 | - | 4.95 | 154,391 |
| U.S. States with Longest Names | 0 | - | 4.84 | 35,519 |
| U.S. States with a Unique First Letter | 0 | - | 4.95 | 77,089 |
| 10 Westernmost U.S. States | 0 | - | 4.95 | 57,889 |
| The Only Remaining U.S. State . . . | 0 | - | 4.94 | 55,131 |
| US States with an Empty Map | 0 | - | 5.00 | 548,919 |
| 10 Longest Rivers in the United States | 0 | - | 4.82 | 34,683 |
| All 3,143 Counties of the United States on a Map | 0 | - | 4.95 | 269,945 |
| Countries Closest to United States by Continent | 0 | - | 4.99 | 123,407 |
| Countries that Beat the United States | 0 | - | 4.92 | 143,796 |
| Senators Who Ran For President | 0 | - | 4.28 | 16,254 |
| U.S. Electoral College Landslides | 0 | - | 4.33 | 20,933 |
| Louisiana Purchase with a Map | 0 | - | 4.94 | 35,516 |
| U.S. States with the Longest International Borders | 0 | - | 4.81 | 39,936 |
| Top 10 Most-Visited U.S. States | 0 | - | 4.89 | 88,563 |
| U.S. States with the Most Immigrants | 0 | - | 4.86 | 72,745 |
| U.S. States or European Countries by Area | 0 | - | 4.95 | 70,364 |
| U.S. States or European Countries by Population | 0 | - | 4.98 | 114,954 |
| Hawaiian Islands Map Quiz | 0 | - | 4.88 | 20,901 |
| Name a Valid U.S. State #1 | 0 | - | 4.95 | 183,105 |
| Top 10 Most Native American U.S. States | 0 | - | 4.84 | 70,385 |
| U.S. Citizenship Test Questions | 0 | - | 4.86 | 220,623 |
| U.S. Political Figures by Picture #1 | 0 | - | 4.10 | 25,025 |
| U.S. Political Figures by Picture #2 | 0 | - | 4.06 | 14,718 |
| Female Political Figures by Picture - U.S. | 0 | - | 4.16 | 10,062 |
| Canadian Prime Ministers Quiz | 0 | - | 4.56 | 47,224 |
| Top 10 Biggest Economies in the Americas | 0 | - | 4.94 | 80,398 |
| States of Mexico | 0 | - | 4.95 | 138,512 |
| Mexico States Map Quiz | 0 | - | 4.85 | 89,493 |
| Top U.S. Universities | 0 | - | 4.11 | 112,097 |
| 10 U.S. States With The Lowest Murder Rates | 0 | - | 4.50 | 33,769 |
| Biggest Trading Partners - US | 0 | - | 4.57 | 91,636 |
| 10 U.S. States With The Highest Murder Rates | 0 | - | 4.44 | 47,586 |
| U.S. State Superlatives #1 | 0 | - | 4.45 | 75,009 |
| U.S. State Superlatives #2 | 0 | - | 4.51 | 37,081 |
| Top 10 U.S. States With the Most Tornadoes | 0 | - | 4.54 | 60,291 |
| Top 10 U.S. States by Public Transit | 0 | - | 4.79 | 58,059 |
| Top 10 U.S. States with the Most Precipitation | 0 | - | 4.44 | 39,220 |
| Top 10 Richest Countries in the Americas | 0 | - | 4.87 | 67,227 |
| U.S. State Nicknames Quiz | 0 | - | 4.49 | 45,818 |
| U.S. National Parks Quiz | 0 | - | 4.79 | 46,278 |
| Countries with American Expatriates | 0 | - | 4.59 | 40,810 |
| United States Landmarks Map Quiz | 0 | - | 4.55 | 38,141 |
| United States Country Quiz | 0 | - | 4.45 | 88,021 |
| Busiest Air Routes from the U.S. | 0 | - | 4.46 | 71,995 |
| Politicians with Other Careers Quiz | 0 | - | 3.94 | 14,552 |
| Main Parts of the U.S. Budget | 0 | - | 3.53 | 8,151 |
| Top 10 Non-English Languages Spoken in New York City | 0 | - | 4.77 | 56,414 |
| 100 Most Influential Figures in U.S. History | 0 | - | 4.19 | 41,028 |
| Countries Closest to Canada | 0 | - | 4.90 | 183,279 |
| Asian Last Names in the United States | 0 | - | 4.41 | 42,993 |
| Two Letter U.S. State Abbreviations | 0 | - | 4.18 | 697,150 |
| Most Guessed U.S. Cities | 0 | - | 4.90 | 90,413 |
| American Legal Vocabulary | 0 | - | 4.43 | 31,984 |
| U.S. Cities with the Biggest Economies | 0 | - | 4.82 | 60,591 |
| Countries Closest to the U. S. | 0 | - | 4.41 | 198,068 |
| Children of U.S. Presidents | 0 | - | 3.92 | 16,149 |
| 10 Closest Megacities to New York City | 0 | - | 4.54 | 54,289 |
| New England States | 0 | - | 4.53 | 52,363 |
| US States by Land Area | 0 | - | 4.59 | 48,206 |
| Top 10 U.S. States by Inland Water Area | 0 | - | 4.52 | 36,009 |
| Add a Letter - Make a U.S. State | 0 | - | 4.74 | 76,002 |
| Top 10 Widest U.S. States East to West | 0 | - | 4.70 | 50,676 |
| Top 10 Tallest U.S. States North to South | 0 | - | 4.79 | 37,013 |
| U.S. States by Wikipedia Descriptions #1 | 0 | - | 4.57 | 37,264 |
| U.S. States by Wikipedia Descriptions #2 | 0 | - | 4.47 | 35,219 |
| 10 Easternmost U.S. States | 0 | - | 4.54 | 52,713 |
| The Only U.S. State ... #1 | 0 | - | 4.55 | 82,156 |
| 50 States, 50 Cities - Hard Version | 0 | - | 4.47 | 40,275 |
| Top 10 Richest U.S. States by Median Income | 0 | - | 4.46 | 102,535 |
| United States Map Quiz | 0 | - | 4.98 | 3,882,559 |
| U.S. Presidents Quiz | 0 | - | 5.00 | 3,136,740 |
| U.S. License Plates Picture Quiz | 0 | - | 4.59 | 48,987 |
| U.S. States with the Fewest Immigrants | 0 | - | 4.66 | 59,367 |
| U.S. States with the Highest Percentage of Farmland | 0 | - | 4.74 | 53,789 |
| U.S. States with the Lowest Percentage of Farmland | 0 | - | 4.76 | 52,705 |
| Longest U.S. State Borders | 0 | - | 4.62 | 33,794 |
| Top 10 U.S. States with the Highest Elevation | 0 | - | 4.52 | 58,120 |
| 10 U.S. States with the Highest Tax Burden | 0 | - | 4.29 | 34,205 |
| Top 10 Least Religious U.S. States | 0 | - | 4.51 | 30,946 |
| Top 10 U.S. States by Manufacturing Employment | 0 | - | 4.51 | 27,458 |
| U.S. States with the Lowest Average Elevation | 0 | - | 4.54 | 31,651 |
| U.S. States with the Fewest Borders | 0 | - | 4.76 | 104,760 |
| U.S. States with the Most Borders | 0 | - | 4.57 | 60,945 |
| Belize Country Quiz | 0 | - | 4.88 | 18,569 |
| Largest United States Airlines | 0 | - | 4.38 | 51,832 |
| Third Most Common Language by U.S. State | 0 | - | 4.90 | 106,059 |
| U.S. Five-Star Generals and Admirals | 0 | - | 4.38 | 7,848 |
| Countries Closest to United States A-Z | 0 | - | 4.86 | 106,327 |
| All U.S. Supreme Court Justices | 0 | - | 4.49 | 27,212 |
| U.S. Presidents by Picture | 0 | - | 4.85 | 392,013 |
| Florida Pro Sport Teams | 0 | - | 4.63 | 9,884 |
| Georgia ... or Georgia? | 0 | - | 4.79 | 71,438 |
| Cities by Picture #2 | 0 | - | 4.22 | 32,147 |
| American Political Words | 0 | - | 4.40 | 22,248 |
| First Names of U.S. Presidents | 0 | - | 4.86 | 351,004 |
| California Groups of Things | 0 | - | 4.23 | 42,555 |
| Top 10 Non-English Languages of Los Angeles | 0 | - | 4.40 | 55,349 |
| New York Groups of Things | 0 | - | 4.39 | 56,969 |
| People on Money - United States | 0 | - | 4.31 | 61,634 |
| U.S. History Groups of Two | 0 | - | 4.27 | 35,133 |
| Last 10 U.S. States Alphabetically | 0 | - | 4.34 | 70,392 |
| Top 10 Least Populous U.S. State Capitals | 0 | - | 4.49 | 20,415 |
| Flyover States | 0 | - | 4.51 | 27,861 |
| U.S. States With Double Letters | 0 | - | 4.64 | 4,032 |
| U.S. States Bigger than Their Neighbors | 0 | - | 4.29 | 57,385 |
| U.S. States by Borders | 0 | - | 4.59 | 26,119 |
| Name a Valid U.S. State #2 | 0 | - | 4.64 | 68,531 |
| Name a Valid U.S. State #3 | 0 | - | 4.79 | 43,600 |
| 50 States, 50 Cities - Easy Version | 0 | - | 4.38 | 120,498 |
| Top 10 Least-Forested U.S. States | 0 | - | 4.48 | 34,831 |
| Famous Canadians by Picture | 0 | - | 4.46 | 29,870 |
| Monarchies of Asia | 0 | - | 4.95 | 53,611 |
| Flags of North and South America Quiz | 0 | - | 4.99 | 306,505 |
| The Only American Country ... | 0 | - | 4.94 | 108,906 |
| American Countries with the Shortest Names | 0 | - | 4.96 | 100,044 |
| U.S. State Border Crossings | 0 | - | 4.96 | 81,458 |
| Five Biggest Immigrant Groups by Decade in the US | 0 | - | 4.82 | 32,499 |
| U.S. Cities with the Most International Tourists | 0 | - | 4.88 | 64,668 |
| U.S. Bill of Rights | 0 | - | 4.56 | 30,971 |
| Name a Valid U.S. President #1 | 0 | - | 4.93 | 165,244 |
| Cities and Towns of Massachusetts | 0 | - | 4.89 | 59,276 |
| Who Did that Motown Song | 0 | - | 4.45 | 12,631 |
| States, Provinces & Territories that Touch the Appalachian Mountains | 0 | - | 4.59 | 19,719 |
| U.S. States with the Lowest HDI | 0 | - | 4.46 | 27,377 |
| Which U.S. State - Multiple Choice | 0 | - | 4.45 | 18,868 |
| Movies by State Quiz | 0 | - | 4.23 | 39,296 |
| U.S. States with the Fewest Traffic Fatalities | 0 | - | 4.19 | 19,108 |
| U.S. States with the Most Traffic Fatalities | 0 | - | 4.07 | 17,370 |
| U.S. States With the Highest Average Elevation | 0 | - | 4.60 | 30,930 |
| Canada Country Quiz | 0 | - | 4.49 | 120,493 |
| Canada Cities Map Quiz | 0 | - | 4.65 | 108,808 |
| Catholic Countries in Europe | 0 | - | 4.87 | 82,808 |
| Monarchies of Europe | 0 | - | 4.88 | 86,284 |
| English Monarchs Quiz | 0 | - | 4.91 | 443,288 |
| Top 10 Coldest Asian Countries | 0 | - | 4.95 | 116,121 |
| Top 10 Biggest Economies in Asia | 0 | - | 4.88 | 100,715 |
| Top 10 Biggest Economies in Africa | 0 | - | 4.99 | 108,673 |
| Mexico Country Quiz | 0 | - | 4.48 | 65,957 |
| All First-Level Subdivisions of South America on a Map | 0 | - | 4.89 | 38,938 |
| Brazil States Map Quiz | 0 | - | 4.84 | 38,946 |
| States of Brazil | 0 | - | 4.96 | 67,339 |
| Fictional Characters from the Midwest by Picture | 0 | - | 4.04 | 18,328 |
| U.S. States by Picture #1 | 0 | - | 4.15 | 14,283 |
| U.S. Cities with the Highest Murder Rate | 0 | - | 4.58 | 129,973 |
| Most-Visited U.S. Cities | 0 | - | 4.87 | 71,232 |
| Every U.S. Metro Area on a Map | 0 | - | 4.96 | 61,952 |
| All U.S. Supreme Court Justices Ever | 0 | - | 4.31 | 10,271 |
| Geography of California | 0 | - | 4.23 | 9,616 |
| California Pro Sport Teams | 0 | - | 4.23 | 22,043 |
| Chicago City Trivia | 0 | - | 4.26 | 30,328 |
| New York Pro Sport Teams | 0 | - | 4.29 | 14,926 |
| Countries Larger Than Texas but With Fewer People | 0 | - | 4.84 | 21,080 |
| Texas Pro Sport Teams | 0 | - | 4.11 | 16,159 |
| History of Pennsylvania | 0 | - | 4.09 | 6,398 |
| History of Virginia | 0 | - | 4.33 | 10,903 |
| Washington State by Picture | 0 | - | 4.16 | 7,096 |
| Events in U.S. History | 0 | - | 4.39 | 25,910 |
| Events by U.S. State #1 | 0 | - | 4.41 | 21,662 |
| States and Provinces that touch the Rocky Mountains | 0 | - | 4.42 | 31,410 |
| Most Valuable Crops by U.S. State | 0 | - | 4.38 | 36,564 |
| U.S. States with the Most Venomous Snake Species | 0 | - | 4.47 | 24,896 |
| U.S. States with the Most Endangered Species | 0 | - | 4.50 | 13,843 |
| African-American Historical Figures | 0 | - | 4.14 | 16,328 |
| Capitals of Canadian Provinces | 0 | - | 4.86 | 73,024 |
| Most-Visited Countries by Canadians | 0 | - | 4.79 | 37,821 |
| Top 10 Coldest European Countries | 0 | - | 4.94 | 180,032 |
| Top 10 Hottest European Countries | 0 | - | 4.87 | 114,846 |
| European Secessionist Movements on a Map | 0 | - | 4.55 | 31,154 |
| Top 10 Biggest Economies in Europe | 0 | - | 4.98 | 176,727 |
| Category Elimination - European Geography #1 | 0 | - | 4.97 | 198,366 |
| Category Elimination - European Geography #2 | 0 | - | 4.99 | 141,203 |
| The United States... or the United Kingdom? | 0 | - | 4.89 | 89,560 |
| Prime Ministers of the UK | 0 | - | 4.95 | 377,873 |
| Top 10 Richest Countries in Asia | 0 | - | 4.86 | 72,952 |
