| U.S. Cabinet Departments | 0 | - | 4.86 | 68,182 |
| U.S. Federal Agency Acronyms | 0 | - | 4.51 | 76,715 |
| Deadliest U.S. Wars | 0 | - | 4.83 | 160,178 |
| U.S. States by Governor Quiz | 0 | - | 4.42 | 17,071 |
| U.S. Political Parties in History | 0 | - | 4.43 | 26,347 |
| U.S. Government Agencies | 0 | - | 4.42 | 17,935 |
| US States Quiz | 0 | - | 5.00 | 15,018,373 |
| Asian Countries Americans Travel to the Most | 0 | - | 4.84 | 55,941 |
| Total United States Immigration by Country | 0 | - | 4.90 | 98,363 |
| Most Common U.S. Last Names - Extreme | 0 | - | 4.93 | 149,706 |
| "Do Not Travel" Countries for U.S. Citizens | 0 | - | 4.94 | 189,462 |
| States of the U.S. in Alphabetical Order | 0 | - | 4.97 | 343,674 |
| Top 10 Coldest U.S. States | 0 | - | 4.92 | 102,434 |
| Top 10 Hottest U.S. States | 0 | - | 4.88 | 112,341 |
| Top 10 U.S. States with the Least Precipitation | 0 | - | 4.83 | 57,643 |
| The U.S. Government - How Does it Work? | 0 | - | 4.32 | 40,207 |
| Pixelated United States Map | 0 | - | 4.90 | 83,853 |
| Most-Visited Countries by Americans | 0 | - | 4.87 | 95,517 |
| Countries that Visit the United States the Most | 0 | - | 4.96 | 80,473 |
| The 13 Colonies Quiz | 0 | - | 4.97 | 102,225 |
| U.S. States with the Letter Y | 0 | - | 4.86 | 97,932 |
| 10 Southernmost U.S. States | 0 | - | 4.86 | 100,908 |
| U.S. States with Short Names | 0 | - | 4.87 | 132,240 |
| U.S. States that Start with M | 0 | - | 4.91 | 152,814 |
| U.S. States By Population | 0 | - | 4.90 | 131,551 |
| U.S. States that Start with N | 0 | - | 4.95 | 157,571 |
| U.S. States with Longest Names | 0 | - | 4.84 | 36,898 |
| U.S. States with a Unique First Letter | 0 | - | 4.95 | 79,073 |
| 10 Westernmost U.S. States | 0 | - | 4.95 | 59,047 |
| The Only Remaining U.S. State . . . | 0 | - | 4.94 | 57,188 |
| US States with an Empty Map | 0 | - | 5.00 | 563,628 |
| 10 Longest Rivers in the United States | 0 | - | 4.82 | 35,482 |
| All 3,143 Counties of the United States on a Map | 0 | - | 4.96 | 282,755 |
| Countries Closest to United States by Continent | 0 | - | 4.99 | 126,243 |
| Countries that Beat the United States | 0 | - | 4.92 | 148,345 |
| Senators Who Ran For President | 0 | - | 4.28 | 16,400 |
| U.S. Electoral College Landslides | 0 | - | 4.34 | 21,136 |
| Louisiana Purchase with a Map | 0 | - | 4.95 | 37,442 |
| U.S. States with the Longest International Borders | 0 | - | 4.81 | 42,582 |
| Top 10 Most-Visited U.S. States | 0 | - | 4.90 | 91,170 |
| U.S. States with the Most Immigrants | 0 | - | 4.86 | 74,589 |
| U.S. States or European Countries by Area | 0 | - | 4.94 | 73,121 |
| U.S. States or European Countries by Population | 0 | - | 4.98 | 117,478 |
| Name a Valid U.S. State #1 | 0 | - | 4.95 | 187,876 |
| Top 10 Most Native American U.S. States | 0 | - | 4.84 | 72,853 |
| U.S. Citizenship Test Questions | 0 | - | 4.86 | 224,392 |
| U.S. Political Figures by Picture #1 | 0 | - | 4.11 | 25,220 |
| U.S. Political Figures by Picture #2 | 0 | - | 4.08 | 14,848 |
| Female Political Figures by Picture - U.S. | 0 | - | 4.17 | 10,194 |
| Canadian Prime Ministers Quiz | 0 | - | 4.65 | 50,703 |
| Top 10 Biggest Economies in the Americas | 0 | - | 4.94 | 83,128 |
| States of Mexico | 0 | - | 4.94 | 145,478 |
| Top U.S. Universities | 0 | - | 4.11 | 115,396 |
| 10 U.S. States With The Lowest Murder Rates | 0 | - | 4.52 | 34,463 |
| Biggest Trading Partners - US | 0 | - | 4.64 | 102,581 |
| 10 U.S. States With The Highest Murder Rates | 0 | - | 4.44 | 47,921 |
| U.S. State Superlatives #1 | 0 | - | 4.46 | 75,942 |
| U.S. State Superlatives #2 | 0 | - | 4.52 | 37,686 |
| Top 10 U.S. States With the Most Tornadoes | 0 | - | 4.54 | 61,211 |
| Top 10 U.S. States by Public Transit | 0 | - | 4.79 | 59,228 |
| Top 10 U.S. States with the Most Precipitation | 0 | - | 4.46 | 39,738 |
| Top 10 Richest Countries in the Americas | 0 | - | 4.88 | 70,197 |
| U.S. State Nicknames Quiz | 0 | - | 4.48 | 46,825 |
| U.S. National Parks Quiz | 0 | - | 4.79 | 47,815 |
| Countries with American Expatriates | 0 | - | 4.58 | 41,187 |
| United States Landmarks Map Quiz | 0 | - | 4.55 | 38,630 |
| United States Country Quiz | 0 | - | 4.44 | 91,049 |
| Busiest Air Routes from the U.S. | 0 | - | 4.47 | 73,297 |
| 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 | 3,230,989 |
| Top 10 Non-English Languages Spoken in New York City | 0 | - | 4.78 | 58,193 |
| 100 Most Influential Figures in U.S. History | 0 | - | 4.18 | 41,741 |
| Countries Closest to Canada | 0 | - | 4.90 | 186,331 |
| Asian Last Names in the United States | 0 | - | 4.42 | 43,843 |
| Canada or Africa by Area | 0 | - | 4.81 | 14,533 |
| Two Letter U.S. State Abbreviations | 0 | - | 4.19 | 707,522 |
| Most Guessed U.S. Cities | 0 | - | 4.90 | 93,258 |
| U.S. Cities with the Biggest Economies | 0 | - | 4.83 | 62,856 |
| Countries Closest to the U. S. | 0 | - | 4.41 | 199,886 |
| American Political Words | 0 | - | 4.41 | 22,472 |
| Children of U.S. Presidents | 0 | - | 3.94 | 16,276 |
| 10 Closest Megacities to New York City | 0 | - | 4.51 | 64,705 |
| New England States | 0 | - | 4.52 | 52,599 |
| US States by Land Area | 0 | - | 4.54 | 49,003 |
| Top 10 U.S. States by Inland Water Area | 0 | - | 4.53 | 36,463 |
| Add a Letter - Make a U.S. State | 0 | - | 4.75 | 77,390 |
| Top 10 Widest U.S. States East to West | 0 | - | 4.70 | 51,756 |
| Top 10 Tallest U.S. States North to South | 0 | - | 4.78 | 37,759 |
| U.S. States by Wikipedia Descriptions #1 | 0 | - | 4.57 | 37,704 |
| U.S. States by Wikipedia Descriptions #2 | 0 | - | 4.47 | 35,627 |
| 10 Easternmost U.S. States | 0 | - | 4.54 | 53,413 |
| The Only U.S. State ... #1 | 0 | - | 4.55 | 83,316 |
| 50 States, 50 Cities - Hard Version | 0 | - | 4.48 | 40,960 |
| Top 10 Richest U.S. States by Median Income | 0 | - | 4.47 | 104,357 |
| United States Map Quiz | 0 | - | 4.98 | 3,935,926 |
| U.S. License Plates Picture Quiz | 0 | - | 4.59 | 49,635 |
| U.S. States with the Fewest Immigrants | 0 | - | 4.69 | 60,726 |
| U.S. States with the Highest Percentage of Farmland | 0 | - | 4.75 | 54,413 |
| U.S. States with the Lowest Percentage of Farmland | 0 | - | 4.76 | 53,253 |
| Longest U.S. State Borders | 0 | - | 4.66 | 35,006 |
| Top 10 U.S. States with the Highest Elevation | 0 | - | 4.51 | 58,602 |
| 10 U.S. States with the Highest Tax Burden | 0 | - | 4.30 | 35,401 |
| Top 10 Least Religious U.S. States | 0 | - | 4.51 | 31,621 |
| Top 10 U.S. States by Manufacturing Employment | 0 | - | 4.51 | 27,760 |
| U.S. States with the Lowest Average Elevation | 0 | - | 4.54 | 31,939 |
| U.S. States with the Fewest Borders | 0 | - | 4.76 | 106,965 |
| U.S. States with the Most Borders | 0 | - | 4.56 | 61,268 |
| Flags of North and South America Quiz | 0 | - | 4.99 | 316,611 |
| Belize Country Quiz | 0 | - | 4.88 | 19,095 |
| Largest United States Airlines | 0 | - | 4.38 | 52,452 |
| Third Most Common Language by U.S. State | 0 | - | 4.90 | 108,264 |
| U.S. Five-Star Generals and Admirals | 0 | - | 4.38 | 7,918 |
| Countries Closest to United States A-Z | 0 | - | 4.84 | 108,705 |
| All U.S. Supreme Court Justices | 0 | - | 4.49 | 27,477 |
| U.S. Presidents by Picture | 0 | - | 4.85 | 398,969 |
| Florida Pro Sport Teams | 0 | - | 4.66 | 10,559 |
| Georgia ... or Georgia? | 0 | - | 4.79 | 72,717 |
| American Legal Vocabulary | 0 | - | 4.40 | 32,410 |
| U.S. Cities by Picture #1 | 0 | - | 4.37 | 32,161 |
| Cities by Picture #2 | 0 | - | 4.22 | 32,792 |
| First Names of U.S. Presidents | 0 | - | 4.86 | 357,369 |
| Famous People from California by Picture | 0 | - | 4.31 | 32,532 |
| California Groups of Things | 0 | - | 4.23 | 43,274 |
| Top 10 Non-English Languages of Los Angeles | 0 | - | 4.40 | 56,318 |
| Hawaiian Islands Map Quiz | 0 | - | 4.75 | 21,244 |
| New York Groups of Things | 0 | - | 4.39 | 57,718 |
| Famous People from Texas by Picture | 0 | - | 4.04 | 31,856 |
| People on Money - United States | 0 | - | 4.31 | 62,002 |
| U.S. History Groups of Two | 0 | - | 4.25 | 42,128 |
| Last 10 U.S. States Alphabetically | 0 | - | 4.34 | 71,430 |
| Top 10 Least Populous U.S. State Capitals | 0 | - | 4.49 | 20,658 |
| Flyover States | 0 | - | 4.51 | 28,203 |
| U.S. States With Double Letters | 0 | - | 4.63 | 21,367 |
| U.S. States Bigger than Their Neighbors | 0 | - | 4.30 | 58,440 |
| U.S. States by Borders | 0 | - | 4.56 | 26,656 |
| Name a Valid U.S. State #2 | 0 | - | 4.63 | 70,506 |
| Name a Valid U.S. State #3 | 0 | - | 4.77 | 44,777 |
| 50 States, 50 Cities - Easy Version | 0 | - | 4.38 | 121,708 |
| Top 10 Least-Forested U.S. States | 0 | - | 4.49 | 43,676 |
| Famous Canadians by Picture | 0 | - | 4.46 | 30,043 |
| European Secessionist Movements on a Map | 0 | - | 4.51 | 31,934 |
| Monarchies of Asia | 0 | - | 4.95 | 54,854 |
| The Only American Country ... | 0 | - | 4.94 | 111,662 |
| American Countries with the Shortest Names | 0 | - | 4.96 | 102,396 |
| Mexico States Map Quiz | 0 | - | 4.80 | 92,248 |
| U.S. State Border Crossings | 0 | - | 4.96 | 83,054 |
| U.S. Cities with the Most International Tourists | 0 | - | 4.88 | 66,559 |
| U.S. Bill of Rights | 0 | - | 4.53 | 31,235 |
| Name a Valid U.S. President #1 | 0 | - | 4.93 | 170,360 |
| Cities and Towns of Massachusetts | 0 | - | 4.90 | 62,452 |
| Who Did that Motown Song | 0 | - | 4.45 | 12,722 |
| Regions of US States | 0 | - | 4.15 | 31,641 |
| States, Provinces & Territories that Touch the Appalachian Mountains | 0 | - | 4.59 | 19,857 |
| U.S. States with the Lowest HDI | 0 | - | 4.46 | 27,695 |
| Which U.S. State - Multiple Choice | 0 | - | 4.45 | 19,179 |
| Movies by State Quiz | 0 | - | 4.23 | 39,552 |
| U.S. States with the Fewest Traffic Fatalities | 0 | - | 4.21 | 19,689 |
| U.S. States with the Most Traffic Fatalities | 0 | - | 4.07 | 17,868 |
| U.S. States With the Highest Average Elevation | 0 | - | 4.60 | 31,318 |
| Canada Country Quiz | 0 | - | 4.54 | 122,979 |
| Canada Cities Map Quiz | 0 | - | 4.57 | 110,457 |
| Catholic Countries in Europe | 0 | - | 4.86 | 85,477 |
| Monarchies of Europe | 0 | - | 4.89 | 88,296 |
| English Monarchs Quiz | 0 | - | 4.91 | 455,052 |
| Top 10 Coldest Asian Countries | 0 | - | 4.95 | 117,336 |
| Top 10 Biggest Economies in Asia | 0 | - | 4.88 | 103,821 |
| Top 10 Biggest Economies in Africa | 0 | - | 4.99 | 111,577 |
| Mexico Country Quiz | 0 | - | 4.48 | 67,374 |
| All First-Level Subdivisions of South America on a Map | 0 | - | 4.91 | 42,306 |
| Brazil States Map Quiz | 0 | - | 4.84 | 40,926 |
| States of Brazil | 0 | - | 4.97 | 71,320 |
| Fictional Characters from the Midwest by Picture | 0 | - | 4.04 | 18,540 |
| U.S. States by Picture #1 | 0 | - | 4.17 | 14,489 |
| U.S. Cities with the Highest Murder Rate | 0 | - | 4.57 | 131,803 |
| Most-Visited U.S. Cities | 0 | - | 4.87 | 75,468 |
| Every U.S. Metro Area on a Map | 0 | - | 4.97 | 64,737 |
| All U.S. Supreme Court Justices Ever | 0 | - | 4.33 | 10,549 |
| Geography of California | 0 | - | 4.23 | 9,783 |
| California Pro Sport Teams | 0 | - | 4.22 | 22,191 |
| Chicago City Trivia | 0 | - | 4.26 | 30,532 |
| New York Pro Sport Teams | 0 | - | 4.30 | 24,790 |
| Countries Larger Than Texas but With Fewer People | 0 | - | 4.85 | 22,575 |
| Texas Pro Sport Teams | 0 | - | 4.13 | 16,294 |
| History of Pennsylvania | 0 | - | 4.09 | 6,528 |
| History of Virginia | 0 | - | 4.33 | 11,015 |
| Washington State by Picture | 0 | - | 4.18 | 7,221 |
| Events in U.S. History | 0 | - | 4.38 | 26,465 |
| Events by U.S. State #1 | 0 | - | 4.42 | 21,938 |
| States and Provinces that touch the Rocky Mountains | 0 | - | 4.42 | 31,554 |
| Most Valuable Crops by U.S. State | 0 | - | 4.40 | 37,120 |
| U.S. States with the Most Venomous Snake Species | 0 | - | 4.47 | 25,252 |
| U.S. States with the Most Endangered Species | 0 | - | 4.50 | 13,919 |
| African-American Historical Figures | 0 | - | 4.14 | 16,474 |
| Capitals of Canadian Provinces | 0 | - | 4.85 | 80,094 |
| Most-Visited Countries by Canadians | 0 | - | 4.79 | 38,081 |
| Top 10 Coldest European Countries | 0 | - | 4.95 | 183,172 |
| Top 10 Hottest European Countries | 0 | - | 4.87 | 117,149 |
| Top 10 Biggest Economies in Europe | 0 | - | 4.98 | 182,133 |
| Category Elimination - European Geography #1 | 0 | - | 4.98 | 205,245 |
