| U.S. Cabinet Departments | 0 | - | 4.86 | 68,200 |
| U.S. Federal Agency Acronyms | 0 | - | 4.51 | 76,737 |
| Deadliest U.S. Wars | 0 | - | 4.83 | 160,545 |
| U.S. States by Governor Quiz | 0 | - | 4.42 | 17,074 |
| U.S. Political Parties in History | 0 | - | 4.43 | 26,357 |
| U.S. Government Agencies | 0 | - | 4.42 | 17,946 |
| US States Quiz | 0 | - | 5.00 | 15,027,070 |
| Asian Countries Americans Travel to the Most | 0 | - | 4.84 | 55,975 |
| Total United States Immigration by Country | 0 | - | 4.90 | 98,406 |
| Most Common U.S. Last Names - Extreme | 0 | - | 4.93 | 149,808 |
| "Do Not Travel" Countries for U.S. Citizens | 0 | - | 4.94 | 189,620 |
| States of the U.S. in Alphabetical Order | 0 | - | 4.97 | 343,808 |
| Top 10 Coldest U.S. States | 0 | - | 4.92 | 102,487 |
| Top 10 Hottest U.S. States | 0 | - | 4.88 | 112,572 |
| Top 10 U.S. States with the Least Precipitation | 0 | - | 4.83 | 57,669 |
| The U.S. Government - How Does it Work? | 0 | - | 4.32 | 40,217 |
| Pixelated United States Map | 0 | - | 4.90 | 83,894 |
| Most-Visited Countries by Americans | 0 | - | 4.87 | 95,587 |
| Countries that Visit the United States the Most | 0 | - | 4.96 | 80,542 |
| The 13 Colonies Quiz | 0 | - | 4.97 | 102,292 |
| U.S. States with the Letter Y | 0 | - | 4.86 | 98,013 |
| 10 Southernmost U.S. States | 0 | - | 4.86 | 100,979 |
| U.S. States with Short Names | 0 | - | 4.87 | 132,342 |
| U.S. States that Start with M | 0 | - | 4.91 | 152,908 |
| U.S. States By Population | 0 | - | 4.90 | 131,619 |
| U.S. States that Start with N | 0 | - | 4.95 | 157,636 |
| U.S. States with Longest Names | 0 | - | 4.84 | 36,924 |
| U.S. States with a Unique First Letter | 0 | - | 4.95 | 79,118 |
| 10 Westernmost U.S. States | 0 | - | 4.95 | 59,062 |
| The Only Remaining U.S. State . . . | 0 | - | 4.94 | 57,230 |
| US States with an Empty Map | 0 | - | 5.00 | 563,938 |
| 10 Longest Rivers in the United States | 0 | - | 4.82 | 35,496 |
| All 3,143 Counties of the United States on a Map | 0 | - | 4.96 | 283,015 |
| Countries Closest to United States by Continent | 0 | - | 4.99 | 126,306 |
| Countries that Beat the United States | 0 | - | 4.92 | 148,436 |
| Senators Who Ran For President | 0 | - | 4.28 | 16,401 |
| U.S. Electoral College Landslides | 0 | - | 4.34 | 21,140 |
| Louisiana Purchase with a Map | 0 | - | 4.95 | 37,488 |
| U.S. States with the Longest International Borders | 0 | - | 4.81 | 42,647 |
| Top 10 Most-Visited U.S. States | 0 | - | 4.90 | 91,220 |
| U.S. States with the Most Immigrants | 0 | - | 4.86 | 74,620 |
| U.S. States or European Countries by Area | 0 | - | 4.94 | 73,180 |
| U.S. States or European Countries by Population | 0 | - | 4.98 | 117,522 |
| Name a Valid U.S. State #1 | 0 | - | 4.95 | 188,146 |
| Top 10 Most Native American U.S. States | 0 | - | 4.84 | 72,916 |
| U.S. Citizenship Test Questions | 0 | - | 4.86 | 224,468 |
| U.S. Political Figures by Picture #1 | 0 | - | 4.11 | 25,222 |
| U.S. Political Figures by Picture #2 | 0 | - | 4.08 | 14,850 |
| Female Political Figures by Picture - U.S. | 0 | - | 4.17 | 10,195 |
| Canadian Prime Ministers Quiz | 0 | - | 4.65 | 50,742 |
| Top 10 Biggest Economies in the Americas | 0 | - | 4.94 | 83,165 |
| States of Mexico | 0 | - | 4.94 | 145,627 |
| Top U.S. Universities | 0 | - | 4.11 | 115,457 |
| 10 U.S. States With The Lowest Murder Rates | 0 | - | 4.52 | 34,478 |
| Biggest Trading Partners - US | 0 | - | 4.64 | 102,601 |
| 10 U.S. States With The Highest Murder Rates | 0 | - | 4.44 | 47,929 |
| U.S. State Superlatives #1 | 0 | - | 4.46 | 75,957 |
| U.S. State Superlatives #2 | 0 | - | 4.52 | 37,701 |
| Top 10 U.S. States With the Most Tornadoes | 0 | - | 4.54 | 61,229 |
| Top 10 Least Religious U.S. States | 0 | - | 4.51 | 31,647 |
| Top 10 U.S. States by Public Transit | 0 | - | 4.79 | 59,262 |
| Top 10 U.S. States with the Most Precipitation | 0 | - | 4.46 | 39,747 |
| Top 10 Richest Countries in the Americas | 0 | - | 4.89 | 70,283 |
| U.S. State Nicknames Quiz | 0 | - | 4.48 | 46,840 |
| U.S. National Parks Quiz | 0 | - | 4.79 | 47,855 |
| Countries with American Expatriates | 0 | - | 4.58 | 41,195 |
| United States Landmarks Map Quiz | 0 | - | 4.55 | 38,636 |
| United States Country Quiz | 0 | - | 4.44 | 91,111 |
| Busiest Air Routes from the U.S. | 0 | - | 4.47 | 73,334 |
| Politicians with Other Careers Quiz | 0 | - | 3.96 | 14,600 |
| Main Parts of the U.S. Budget | 0 | - | 3.55 | 8,208 |
| U.S. Presidents Quiz | 0 | - | 5.00 | 3,233,017 |
| Top 10 Non-English Languages Spoken in New York City | 0 | - | 4.78 | 58,235 |
| 100 Most Influential Figures in U.S. History | 0 | - | 4.18 | 41,770 |
| Countries Closest to Canada | 0 | - | 4.90 | 186,595 |
| Asian Last Names in the United States | 0 | - | 4.42 | 43,868 |
| Canada or Africa by Area | 0 | - | 4.81 | 14,565 |
| Two Letter U.S. State Abbreviations | 0 | - | 4.19 | 707,805 |
| Most Guessed U.S. Cities | 0 | - | 4.90 | 93,328 |
| U.S. Cities with the Biggest Economies | 0 | - | 4.83 | 62,890 |
| Countries Closest to the U. S. | 0 | - | 4.41 | 199,909 |
| American Political Words | 0 | - | 4.41 | 22,475 |
| Children of U.S. Presidents | 0 | - | 3.94 | 16,278 |
| 10 Closest Megacities to New York City | 0 | - | 4.51 | 64,720 |
| New England States | 0 | - | 4.52 | 52,604 |
| US States by Land Area | 0 | - | 4.54 | 49,018 |
| Top 10 U.S. States by Inland Water Area | 0 | - | 4.53 | 36,472 |
| Add a Letter - Make a U.S. State | 0 | - | 4.75 | 77,415 |
| Top 10 Widest U.S. States East to West | 0 | - | 4.70 | 51,782 |
| Top 10 Tallest U.S. States North to South | 0 | - | 4.78 | 37,772 |
| U.S. States by Wikipedia Descriptions #1 | 0 | - | 4.57 | 37,710 |
| U.S. States by Wikipedia Descriptions #2 | 0 | - | 4.47 | 35,637 |
| 10 Easternmost U.S. States | 0 | - | 4.54 | 53,429 |
| The Only U.S. State ... #1 | 0 | - | 4.55 | 83,345 |
| 50 States, 50 Cities - Hard Version | 0 | - | 4.48 | 40,969 |
| Top 10 Richest U.S. States by Median Income | 0 | - | 4.47 | 104,379 |
| United States Map Quiz | 0 | - | 4.98 | 3,936,834 |
| U.S. License Plates Picture Quiz | 0 | - | 4.59 | 49,649 |
| U.S. States with the Fewest Immigrants | 0 | - | 4.69 | 60,759 |
| U.S. States with the Highest Percentage of Farmland | 0 | - | 4.75 | 54,431 |
| U.S. States with the Lowest Percentage of Farmland | 0 | - | 4.76 | 53,265 |
| Longest U.S. State Borders | 0 | - | 4.66 | 35,042 |
| Top 10 U.S. States with the Highest Elevation | 0 | - | 4.51 | 58,606 |
| 10 U.S. States with the Highest Tax Burden | 0 | - | 4.30 | 35,420 |
| Top 10 U.S. States by Manufacturing Employment | 0 | - | 4.51 | 27,767 |
| U.S. States with the Lowest Average Elevation | 0 | - | 4.54 | 31,948 |
| U.S. States with the Fewest Borders | 0 | - | 4.76 | 106,999 |
| U.S. States with the Most Borders | 0 | - | 4.56 | 61,272 |
| Flags of North and South America Quiz | 0 | - | 4.99 | 316,800 |
| Belize Country Quiz | 0 | - | 4.88 | 19,111 |
| Largest United States Airlines | 0 | - | 4.38 | 52,467 |
| Third Most Common Language by U.S. State | 0 | - | 4.90 | 108,291 |
| U.S. Five-Star Generals and Admirals | 0 | - | 4.38 | 7,918 |
| Countries Closest to United States A-Z | 0 | - | 4.84 | 108,751 |
| All U.S. Supreme Court Justices | 0 | - | 4.49 | 27,478 |
| U.S. Presidents by Picture | 0 | - | 4.85 | 399,126 |
| Florida Pro Sport Teams | 0 | - | 4.66 | 10,567 |
| Georgia ... or Georgia? | 0 | - | 4.79 | 72,744 |
| American Legal Vocabulary | 0 | - | 4.40 | 32,415 |
| U.S. Cities by Picture #1 | 0 | - | 4.37 | 32,169 |
| Cities by Picture #2 | 0 | - | 4.22 | 32,811 |
| First Names of U.S. Presidents | 0 | - | 4.86 | 357,528 |
| Famous People from California by Picture | 0 | - | 4.31 | 32,562 |
| California Groups of Things | 0 | - | 4.23 | 43,290 |
| Top 10 Non-English Languages of Los Angeles | 0 | - | 4.40 | 56,337 |
| Hawaiian Islands Map Quiz | 0 | - | 4.75 | 21,254 |
| New York Groups of Things | 0 | - | 4.39 | 57,734 |
| Famous People from Texas by Picture | 0 | - | 4.04 | 31,871 |
| People on Money - United States | 0 | - | 4.31 | 62,005 |
| U.S. History Groups of Two | 0 | - | 4.25 | 42,149 |
| Last 10 U.S. States Alphabetically | 0 | - | 4.34 | 71,446 |
| Top 10 Least Populous U.S. State Capitals | 0 | - | 4.49 | 20,668 |
| Flyover States | 0 | - | 4.51 | 28,212 |
| U.S. States With Double Letters | 0 | - | 4.63 | 21,391 |
| U.S. States Bigger than Their Neighbors | 0 | - | 4.30 | 58,468 |
| U.S. States by Borders | 0 | - | 4.58 | 30,657 |
| Name a Valid U.S. State #2 | 0 | - | 4.63 | 70,577 |
| Name a Valid U.S. State #3 | 0 | - | 4.77 | 44,796 |
| 50 States, 50 Cities - Easy Version | 0 | - | 4.38 | 121,725 |
| Top 10 Least-Forested U.S. States | 0 | - | 4.49 | 43,714 |
| Famous Canadians by Picture | 0 | - | 4.46 | 30,049 |
| European Secessionist Movements on a Map | 0 | - | 4.51 | 31,956 |
| Monarchies of Asia | 0 | - | 4.95 | 54,880 |
| The Only American Country ... | 0 | - | 4.94 | 111,704 |
| American Countries with the Shortest Names | 0 | - | 4.96 | 102,437 |
| Mexico States Map Quiz | 0 | - | 4.80 | 92,281 |
| U.S. State Border Crossings | 0 | - | 4.96 | 83,075 |
| U.S. Cities with the Most International Tourists | 0 | - | 4.88 | 66,598 |
| U.S. Bill of Rights | 0 | - | 4.53 | 31,243 |
| Name a Valid U.S. President #1 | 0 | - | 4.93 | 170,476 |
| Cities and Towns of Massachusetts | 0 | - | 4.90 | 62,539 |
| Who Did that Motown Song | 0 | - | 4.45 | 12,725 |
| Regions of US States | 0 | - | 4.15 | 31,648 |
| States, Provinces & Territories that Touch the Appalachian Mountains | 0 | - | 4.59 | 19,860 |
| U.S. States with the Lowest HDI | 0 | - | 4.46 | 27,707 |
| Which U.S. State - Multiple Choice | 0 | - | 4.45 | 19,185 |
| Movies by State Quiz | 0 | - | 4.23 | 39,554 |
| U.S. States with the Fewest Traffic Fatalities | 0 | - | 4.21 | 19,700 |
| U.S. States with the Most Traffic Fatalities | 0 | - | 4.07 | 17,875 |
| U.S. States With the Highest Average Elevation | 0 | - | 4.60 | 31,329 |
| Canada Country Quiz | 0 | - | 4.54 | 123,036 |
| Canada Cities Map Quiz | 0 | - | 4.57 | 110,488 |
| Catholic Countries in Europe | 0 | - | 4.86 | 85,527 |
| Monarchies of Europe | 0 | - | 4.89 | 88,342 |
| English Monarchs Quiz | 0 | - | 4.91 | 455,306 |
| Top 10 Coldest Asian Countries | 0 | - | 4.95 | 117,362 |
| Top 10 Biggest Economies in Asia | 0 | - | 4.88 | 103,877 |
| Top 10 Biggest Economies in Africa | 0 | - | 4.99 | 111,620 |
| Mexico Country Quiz | 0 | - | 4.48 | 67,418 |
| All First-Level Subdivisions of South America on a Map | 0 | - | 4.91 | 42,387 |
| Brazil States Map Quiz | 0 | - | 4.84 | 40,977 |
| States of Brazil | 0 | - | 4.97 | 71,414 |
| Fictional Characters from the Midwest by Picture | 0 | - | 4.04 | 18,545 |
| U.S. States by Picture #1 | 0 | - | 4.17 | 14,491 |
| U.S. Cities with the Highest Murder Rate | 0 | - | 4.57 | 131,834 |
| Most-Visited U.S. Cities | 0 | - | 4.87 | 75,561 |
| Every U.S. Metro Area on a Map | 0 | - | 4.97 | 64,802 |
| All U.S. Supreme Court Justices Ever | 0 | - | 4.33 | 10,563 |
| Geography of California | 0 | - | 4.23 | 9,785 |
| California Pro Sport Teams | 0 | - | 4.22 | 22,195 |
| Chicago City Trivia | 0 | - | 4.26 | 30,535 |
| New York Pro Sport Teams | 0 | - | 4.30 | 24,798 |
| Countries Larger Than Texas but With Fewer People | 0 | - | 4.85 | 22,612 |
| Texas Pro Sport Teams | 0 | - | 4.13 | 16,297 |
| History of Pennsylvania | 0 | - | 4.09 | 6,531 |
| History of Virginia | 0 | - | 4.33 | 11,018 |
| Washington State by Picture | 0 | - | 4.18 | 7,224 |
| Events in U.S. History | 0 | - | 4.38 | 26,479 |
| Events by U.S. State #1 | 0 | - | 4.42 | 21,945 |
| States and Provinces that touch the Rocky Mountains | 0 | - | 4.42 | 31,561 |
| Most Valuable Crops by U.S. State | 0 | - | 4.40 | 37,129 |
| U.S. States with the Most Venomous Snake Species | 0 | - | 4.47 | 25,255 |
| U.S. States with the Most Endangered Species | 0 | - | 4.50 | 13,920 |
| African-American Historical Figures | 0 | - | 4.14 | 16,478 |
| Capitals of Canadian Provinces | 0 | - | 4.85 | 80,136 |
| Most-Visited Countries by Canadians | 0 | - | 4.79 | 38,090 |
| Top 10 Coldest European Countries | 0 | - | 4.95 | 183,233 |
| Top 10 Hottest European Countries | 0 | - | 4.87 | 117,192 |
| Top 10 Biggest Economies in Europe | 0 | - | 4.98 | 182,218 |
| Category Elimination - European Geography #1 | 0 | - | 4.98 | 205,358 |
