| Most Common U.S. Last Names - Extreme | 0 | - | 4.94 | 170,839 |
| Countries that Beat the United States | 0 | - | 4.93 | 162,492 |
| US States Quiz | 0 | - | 5.00 | 16,390,521 |
| U.S. National Parks Quiz | 0 | - | 4.83 | 53,434 |
| Total United States Immigration by Country | 0 | - | 4.90 | 108,272 |
| "Do Not Travel" Countries for U.S. Citizens | 0 | - | 4.97 | 233,809 |
| U.S. Cabinet Departments | 0 | - | 4.86 | 71,754 |
| Top 10 Non-English Languages Spoken in New York City | 0 | - | 4.84 | 63,945 |
| States of the U.S. in Alphabetical Order | 0 | - | 4.98 | 361,797 |
| All 3,143 Counties of the United States on a Map | 0 | - | 4.96 | 320,679 |
| Pixelated United States Map | 0 | - | 4.90 | 91,778 |
| Most-Visited Countries by Americans | 0 | - | 4.87 | 105,891 |
| Countries that Visit the United States the Most | 0 | - | 4.96 | 88,923 |
| Deadliest U.S. Wars | 0 | - | 4.89 | 186,768 |
| The 13 Colonies Quiz | 0 | - | 4.97 | 114,876 |
| U.S. States with the Letter Y | 0 | - | 4.85 | 108,371 |
| 10 Southernmost U.S. States | 0 | - | 4.88 | 110,469 |
| U.S. States with Short Names | 0 | - | 4.91 | 145,278 |
| U.S. States that Start with M | 0 | - | 4.93 | 183,496 |
| U.S. States By Population | 0 | - | 4.90 | 139,753 |
| U.S. States that Start with N | 0 | - | 4.95 | 167,997 |
| U.S. States with Longest Names | 0 | - | 4.84 | 42,731 |
| U.S. States with a Unique First Letter | 0 | - | 4.96 | 86,047 |
| 10 Westernmost U.S. States | 0 | - | 4.95 | 62,866 |
| The Only Remaining U.S. State . . . | 0 | - | 4.92 | 63,615 |
| US States with an Empty Map | 0 | - | 5.00 | 609,383 |
| U.S. State Nicknames Quiz | 0 | - | 4.50 | 49,627 |
| 10 Longest Rivers in the United States | 0 | - | 4.84 | 38,209 |
| Countries Closest to United States by Continent | 0 | - | 4.99 | 143,433 |
| Louisiana Purchase with a Map | 0 | - | 4.96 | 45,769 |
| Top 10 Most-Visited U.S. States | 0 | - | 4.90 | 99,120 |
| U.S. States with the Most Immigrants | 0 | - | 4.85 | 80,465 |
| Countries that Beat Canada | 0 | - | 4.90 | 85,641 |
| U.S. States or European Countries by Area | 0 | - | 4.94 | 91,883 |
| U.S. States or European Countries by Population | 0 | - | 4.98 | 129,187 |
| Name a Valid U.S. State #1 | 0 | - | 4.93 | 203,457 |
| Top 10 Coldest U.S. States | 0 | - | 4.94 | 121,694 |
| Top 10 Hottest U.S. States | 0 | - | 4.86 | 122,666 |
| Top 10 Most Native American U.S. States | 0 | - | 4.86 | 89,076 |
| Top 10 U.S. States with the Least Precipitation | 0 | - | 4.82 | 60,821 |
| American Countries with the Shortest Names | 0 | - | 4.96 | 118,843 |
| Asian Last Names in the United States | 0 | - | 4.43 | 46,062 |
| States of Mexico | 0 | - | 4.95 | 167,308 |
| Mexico States Map Quiz | 0 | - | 4.84 | 101,509 |
| Countries with American Expatriates | 0 | - | 4.55 | 42,244 |
| United States Landmarks Map Quiz | 0 | - | 4.55 | 39,846 |
| United States Country Quiz | 0 | - | 4.44 | 98,792 |
| Busiest Air Routes from the U.S. | 0 | - | 4.47 | 76,087 |
| California Groups of Things | 0 | - | 4.24 | 44,953 |
| New York Groups of Things | 0 | - | 4.37 | 59,563 |
| U.S. History Groups of Two | 0 | - | 4.23 | 43,869 |
| Countries Closest to Canada | 0 | - | 4.90 | 195,469 |
| Asian Countries Americans Travel to the Most | 0 | - | 4.74 | 59,017 |
| U.S. Geography by Letter - B | 0 | - | 4.54 | 66,981 |
| U.S. Geography by Letter - S | 0 | - | 4.54 | 50,908 |
| Two Letter U.S. State Abbreviations | 0 | - | 4.18 | 735,754 |
| U.S. Federal Agency Acronyms | 0 | - | 4.50 | 79,264 |
| Top 10 Non-English Languages of Los Angeles | 0 | - | 4.42 | 58,969 |
| 10 Closest Megacities to New York City | 0 | - | 4.52 | 66,828 |
| New England States | 0 | - | 4.51 | 59,485 |
| U.S. States by Land Area | 0 | - | 4.62 | 51,777 |
| Top 10 U.S. States by Inland Water Area | 0 | - | 4.53 | 37,683 |
| Add a Letter - Make a U.S. State | 0 | - | 4.70 | 81,478 |
| Top 10 Widest U.S. States East to West | 0 | - | 4.69 | 54,947 |
| Top 10 Tallest U.S. States North to South | 0 | - | 4.78 | 40,227 |
| U.S. States by Borders | 0 | - | 4.62 | 34,668 |
| 10 Easternmost U.S. States | 0 | - | 4.53 | 55,744 |
| The Only U.S. State ... #1 | 0 | - | 4.52 | 100,411 |
| Movies by State | 0 | - | 4.24 | 40,275 |
| 50 States, 50 Cities - Hard Version | 0 | - | 4.47 | 43,412 |
| United States Map Quiz | 0 | - | 4.98 | 4,113,117 |
| U.S. License Plates Picture Quiz | 0 | - | 4.58 | 52,076 |
| U.S. States with the Fewest Immigrants | 0 | - | 4.63 | 64,601 |
| U.S. States with the Highest Percentage of Farmland | 0 | - | 4.80 | 64,785 |
| U.S. States with the Lowest Percentage of Farmland | 0 | - | 4.74 | 54,726 |
| Walking Across U.S. State Borders with Hints | 0 | - | 4.74 | 34,754 |
| U.S. States with the Longest International Borders | 0 | - | 4.78 | 45,183 |
| Longest U.S. State Borders | 0 | - | 4.64 | 38,551 |
| Most Valuable Crops by U.S. State | 0 | - | 4.40 | 38,605 |
| Top 10 U.S. States with the Highest Elevation | 0 | - | 4.51 | 67,551 |
| U.S. States with the Lowest Average Elevation | 0 | - | 4.55 | 38,162 |
| U.S. States With the Highest Average Elevation | 0 | - | 4.61 | 32,469 |
| U.S. States with the Fewest Borders | 0 | - | 4.77 | 112,059 |
| U.S. States with the Most Borders | 0 | - | 4.53 | 62,078 |
| Flags of North and South America | 0 | - | 4.99 | 349,011 |
| Belize Country Quiz | 0 | - | 4.87 | 20,499 |
| Top U.S. Universities | 0 | - | 4.15 | 141,439 |
| Largest United States Airlines | 0 | - | 4.39 | 54,367 |
| Third Most Common Language by U.S. State | 0 | - | 4.89 | 112,752 |
| U.S. States by Governor | 0 | - | 4.43 | 17,800 |
| U.S. Political Parties in History | 0 | - | 4.44 | 27,345 |
| U.S. Government Agencies | 0 | - | 4.44 | 19,253 |
| Florida Pro Sport Teams | 0 | - | 4.69 | 11,563 |
| Countries of Europe - One Minute Sprint | 0 | - | 4.94 | 1,302,839 |
| Georgia ... or Georgia? | 0 | - | 4.69 | 75,740 |
| U.S. Geography by Letter - C | 0 | - | 4.26 | 72,070 |
| U.S. Geography by Letter - A | 0 | - | 4.36 | 60,904 |
| U.S. Geography by Letter - D | 0 | - | 4.08 | 54,949 |
| U.S. Geography by Letter - T | 0 | - | 4.27 | 47,870 |
| U.S. Geography by Letter - P | 0 | - | 4.34 | 46,090 |
| U.S. Geography by Letter - M | 0 | - | 4.20 | 45,073 |
| U.S. Geography by Letter - G | 0 | - | 4.11 | 37,310 |
| U.S. Geography By Letter - H | 0 | - | 4.37 | 37,757 |
| American Legal Vocabulary | 0 | - | 4.40 | 33,521 |
| U.S. Cities by Picture #1 | 0 | - | 4.37 | 33,943 |
| Cities by Picture #2 | 0 | - | 4.19 | 34,608 |
| 10 U.S. States With The Lowest Murder Rates | 0 | - | 4.49 | 36,668 |
| Countries Closest to the U. S. | 0 | - | 4.40 | 204,664 |
| Biggest Trading Partners - US | 0 | - | 4.63 | 105,703 |
| The U.S. Government - How Does it Work? | 0 | - | 4.34 | 41,850 |
| Famous People from California by Picture | 0 | - | 4.31 | 35,544 |
| Hawaiian Islands Map Quiz | 0 | - | 4.78 | 22,048 |
| Boston Talk to English Translation Quiz | 0 | - | 4.56 | 49,669 |
| People on Money - United States | 0 | - | 4.30 | 63,012 |
| 100 Most Influential Figures in U.S. History | 0 | - | 4.21 | 44,245 |
| Last 10 U.S. States Alphabetically | 0 | - | 4.35 | 74,016 |
| Top 10 Least Populous U.S. State Capitals | 0 | - | 4.51 | 21,338 |
| 10 U.S. States With The Highest Murder Rates | 0 | - | 4.44 | 49,316 |
| Flyover States | 0 | - | 4.52 | 29,177 |
| U.S. States With Double Letters | 0 | - | 4.59 | 23,498 |
| U.S. States Bigger than Their Neighbors | 0 | - | 4.27 | 75,139 |
| U.S. States by Wikipedia Descriptions #1 | 0 | - | 4.57 | 38,920 |
| U.S. States by Wikipedia Descriptions #2 | 0 | - | 4.47 | 36,735 |
| States and Provinces that touch the Rocky Mountains | 0 | - | 4.42 | 32,252 |
| Name a Valid U.S. State #2 | 0 | - | 4.63 | 75,514 |
| Name a Valid U.S. State #3 | 0 | - | 4.77 | 47,803 |
| U.S. State Superlatives #1 | 0 | - | 4.47 | 86,633 |
| U.S. State Superlatives #2 | 0 | - | 4.53 | 40,076 |
| Musical Acts by State | 0 | - | 4.05 | 19,491 |
| 50 States, 50 Cities - Easy Version | 0 | - | 4.40 | 126,483 |
| Top 10 U.S. States With the Most Tornadoes | 0 | - | 4.53 | 63,734 |
| Top 10 Richest U.S. States by Median Income | 0 | - | 4.47 | 117,478 |
| Top 10 Least Religious U.S. States | 0 | - | 4.51 | 33,672 |
| Top 10 Least-Forested U.S. States | 0 | - | 4.50 | 45,703 |
| Top 10 U.S. States by Public Transit | 0 | - | 4.78 | 62,643 |
| Top 10 U.S. States with the Most Precipitation | 0 | - | 4.46 | 41,239 |
| Famous Italian-Americans | 0 | - | 4.07 | 9,525 |
| Foods in a Full English Breakfast | 0 | - | 4.46 | 100,620 |
| Africa Geography Quiz #1 | 0 | - | 4.93 | 48,551 |
| The Only American Country ... | 0 | - | 4.92 | 118,515 |
| U.S. State Border Crossings | 0 | - | 4.97 | 94,488 |
| U.S. Citizenship Test Questions | 0 | - | 4.83 | 235,794 |
| American Foods | 0 | - | 3.66 | 39,059 |
| U.S. Cities with the Most International Tourists | 0 | - | 4.88 | 73,207 |
| Cities and Towns of Massachusetts | 0 | - | 4.92 | 71,590 |
| Who Did that Motown Song | 0 | - | 4.48 | 12,967 |
| Regions of U.S. States | 0 | - | 4.28 | 35,884 |
| States, Provinces & Territories that Touch the Appalachian Mountains | 0 | - | 4.59 | 20,271 |
| 10 U.S. States with the Most Valuable Crops | 0 | - | 4.41 | 29,342 |
| U.S. States with the Lowest HDI | 0 | - | 4.46 | 28,578 |
| Which U.S. State - Multiple Choice | 0 | - | 4.48 | 20,050 |
| People by U.S. State - Multiple Choice | 0 | - | 4.06 | 9,746 |
| Canada Country Quiz | 0 | - | 4.53 | 129,974 |
| Canada Cities Map Quiz | 0 | - | 4.63 | 122,541 |
| Canada A-Z | 0 | - | 4.70 | 32,324 |
| Asian Countries with the Shortest Names | 0 | - | 4.97 | 132,507 |
| Countries with the Most McDonald's Locations | 0 | - | 4.83 | 109,414 |
| Biggest Countries with No McDonald's | 0 | - | 4.84 | 87,687 |
| Category Elimination - African Geography #1 | 0 | - | 4.90 | 89,342 |
| Name a Valid African Country | 0 | - | 4.98 | 150,444 |
| Top 10 Biggest Economies in the Americas | 0 | - | 4.93 | 89,920 |
| Hispanic Last Names in the U.S. | 0 | - | 4.30 | 54,359 |
| Mexico Country Quiz | 0 | - | 4.49 | 71,066 |
| Mexico Cities Map Quiz | 0 | - | 4.77 | 32,945 |
| Mexican Foods | 0 | - | 4.07 | 14,444 |
| South American Geography Quiz #2 | 0 | - | 4.68 | 38,850 |
| South American Geography Quiz #1 | 0 | - | 4.74 | 32,198 |
| All First-Level Subdivisions of South America on a Map | 0 | - | 4.91 | 50,636 |
| Brazil States Map Quiz | 0 | - | 4.85 | 46,096 |
| States of Brazil | 0 | - | 4.98 | 83,269 |
| Fictional Characters from the Midwest by Picture | 0 | - | 4.04 | 19,067 |
| U.S. States by Picture #1 | 0 | - | 4.21 | 15,204 |
| Random U.S. City to State | 0 | - | 4.44 | 73,566 |
| Most-Visited U.S. Cities | 0 | - | 4.85 | 89,272 |
| Every U.S. Metro Area on a Map | 0 | - | 4.97 | 78,744 |
| Senators Who Ran For President | 0 | - | 4.23 | 16,891 |
| U.S. Electoral College Landslides | 0 | - | 4.34 | 21,835 |
| Geography of California | 0 | - | 4.25 | 10,360 |
| California Pro Sport Teams | 0 | - | 4.19 | 22,568 |
| Chicago City Trivia | 0 | - | 4.30 | 31,217 |
| New York Pro Sport Teams | 0 | - | 4.32 | 25,611 |
| Countries Larger Than Texas but With Fewer People | 0 | - | 4.89 | 26,609 |
| Texas Pro Sport Teams | 0 | - | 4.19 | 16,681 |
| History of Pennsylvania | 0 | - | 4.16 | 7,021 |
| History of Virginia | 0 | - | 4.31 | 11,482 |
| Washington State by Picture | 0 | - | 4.26 | 7,602 |
| Events in U.S. History | 0 | - | 4.40 | 28,079 |
| Events by U.S. State #1 | 0 | - | 4.42 | 22,710 |
| 10 U.S. States with the Highest Tax Burden | 0 | - | 4.26 | 37,623 |
| Top 10 U.S. States by Manufacturing Employment | 0 | - | 4.49 | 28,568 |
| U.S. States with the Most Venomous Snake Species | 0 | - | 4.47 | 26,125 |
| U.S. States with the Most Endangered Species | 0 | - | 4.50 | 14,259 |
| African-American Historical Figures | 0 | - | 4.18 | 16,976 |
| Canadian Prime Ministers Quiz | 0 | - | 4.63 | 56,016 |
| Capitals of Canadian Provinces | 0 | - | 4.87 | 86,852 |
| Most-Visited Countries by Canadians | 0 | - | 4.77 | 38,940 |
| U.S. States With No City Over 100,000 | 0 | - | 4.55 | 17,487 |
| Category Elimination - European Geography #1 | 0 | - | 4.98 | 225,896 |
| European Map without 10 Random Countries | 0 | - | 4.97 | 269,955 |
| Category Elimination - European Geography #2 | 0 | - | 4.99 | 161,751 |
