| Asian Last Names in the United States | 0 | - | 4.43 | 46,781 |
| Countries that Beat the United States | 0 | - | 4.93 | 167,523 |
| U.S. State Nicknames | 0 | - | 4.47 | 50,535 |
| US States Quiz | 0 | - | 5.00 | 16,882,947 |
| Name the U.S. National Parks | 0 | - | 4.86 | 59,972 |
| Total United States Immigration by Country | 0 | - | 4.91 | 111,692 |
| "Do Not Travel" Countries for U.S. Citizens | 0 | - | 4.97 | 244,192 |
| U.S. Cabinet Departments | 0 | - | 4.86 | 72,890 |
| Top 10 Non-English Languages Spoken in New York City | 0 | - | 4.85 | 66,256 |
| States of the U.S. in Alphabetical Order | 0 | - | 4.98 | 367,150 |
| All 3,143 Counties of the United States on a Map | 0 | - | 4.97 | 332,268 |
| Pixelated United States Map | 0 | - | 4.87 | 94,302 |
| Most-Visited Countries by Americans | 0 | - | 4.86 | 109,726 |
| Countries that Visit the United States the Most | 0 | - | 4.96 | 91,804 |
| Deadliest U.S. Wars | 0 | - | 4.89 | 190,831 |
| The 13 Colonies Quiz | 0 | - | 4.97 | 117,934 |
| U.S. States with the Letter Y | 0 | - | 4.85 | 111,471 |
| 10 Southernmost U.S. States | 0 | - | 4.88 | 113,482 |
| U.S. States with Short Names | 0 | - | 4.91 | 149,066 |
| U.S. States that Start with M | 0 | - | 4.93 | 187,351 |
| U.S. States By Population | 0 | - | 4.92 | 153,580 |
| U.S. States that Start with N | 0 | - | 4.95 | 171,495 |
| U.S. States with Longest Names | 0 | - | 4.84 | 44,463 |
| U.S. States with a Unique First Letter | 0 | - | 4.96 | 88,348 |
| 10 Westernmost U.S. States | 0 | - | 4.95 | 64,231 |
| The Only Remaining U.S. State . . . | 0 | - | 4.93 | 65,652 |
| US States with an Empty Map | 0 | - | 5.00 | 624,865 |
| 10 Longest Rivers in the United States | 0 | - | 4.85 | 39,184 |
| Countries Closest to United States by Continent | 0 | - | 4.99 | 146,479 |
| Louisiana Purchase with a Map | 0 | - | 4.96 | 48,644 |
| Top 10 Most-Visited U.S. States | 0 | - | 4.90 | 101,795 |
| U.S. States with the Most Immigrants | 0 | - | 4.85 | 82,506 |
| Countries that Beat Canada | 0 | - | 4.91 | 97,833 |
| U.S. States or European Countries by Area | 0 | - | 4.95 | 96,108 |
| U.S. States or European Countries by Population | 0 | - | 4.97 | 133,266 |
| Name a Valid U.S. State #1 | 0 | - | 4.93 | 209,030 |
| Top 10 Coldest U.S. States | 0 | - | 4.94 | 124,682 |
| Top 10 Hottest U.S. States | 0 | - | 4.86 | 125,693 |
| Top 10 Most Native American U.S. States | 0 | - | 4.87 | 92,121 |
| Top 10 U.S. States with the Least Precipitation | 0 | - | 4.82 | 61,921 |
| American Countries with the Shortest Names | 0 | - | 4.96 | 121,150 |
| Hispanic Last Names in the U.S. | 0 | - | 4.31 | 54,759 |
| States of Mexico | 0 | - | 4.96 | 176,220 |
| Mexico States Map Quiz | 0 | - | 4.84 | 104,789 |
| Midwestern States of the U.S. | 0 | - | 4.88 | 13,830 |
| Mexico Cities Map Quiz | 0 | - | 4.83 | 38,582 |
| Countries with American Expatriates | 0 | - | 4.53 | 42,590 |
| United States Landmarks Map Quiz | 0 | - | 4.55 | 40,186 |
| United States Country Quiz | 0 | - | 4.43 | 101,554 |
| Busiest Air Routes from the U.S. | 0 | - | 4.46 | 76,899 |
| California Groups of Things | 0 | - | 4.25 | 45,496 |
| New York Groups of Things | 0 | - | 4.35 | 63,762 |
| U.S. History Groups of Two | 0 | - | 4.23 | 44,472 |
| Most-Visited Countries by Canadians | 0 | - | 4.82 | 39,402 |
| Countries Closest to Canada | 0 | - | 4.91 | 198,394 |
| Asian Countries Americans Travel to the Most | 0 | - | 4.75 | 59,993 |
| U.S. Geography by Letter - B | 0 | - | 4.53 | 69,434 |
| U.S. Geography by Letter - S | 0 | - | 4.55 | 52,880 |
| Two Letter U.S. State Abbreviations | 0 | - | 4.19 | 747,308 |
| Names of Generations | 0 | - | 4.09 | 44,975 |
| Countries Closest to the U. S. | 0 | - | 4.41 | 209,550 |
| U.S. Federal Agency Acronyms | 0 | - | 4.50 | 79,992 |
| Top 10 Non-English Languages of Los Angeles | 0 | - | 4.42 | 59,901 |
| 10 Closest Megacities to New York City | 0 | - | 4.52 | 67,355 |
| Last Names in U.S. History #1 | 0 | - | 4.25 | 36,249 |
| New England States | 0 | - | 4.51 | 59,815 |
| U.S. States by Land Area | 0 | - | 4.61 | 52,827 |
| Top 10 U.S. States by Inland Water Area | 0 | - | 4.53 | 38,015 |
| Add a Letter - Make a U.S. State | 0 | - | 4.72 | 82,834 |
| Top 10 Widest U.S. States East to West | 0 | - | 4.70 | 56,021 |
| Top 10 Tallest U.S. States North to South | 0 | - | 4.74 | 40,940 |
| U.S. States by Borders | 0 | - | 4.61 | 35,329 |
| 10 Easternmost U.S. States | 0 | - | 4.53 | 56,488 |
| The Only U.S. State ... #1 | 0 | - | 4.52 | 102,053 |
| Movies by State | 0 | - | 4.27 | 40,547 |
| 50 States, 50 Cities - Hard Version | 0 | - | 4.46 | 44,233 |
| United States Map Quiz | 0 | - | 4.98 | 4,159,134 |
| U.S. License Plates Picture Quiz | 0 | - | 4.61 | 52,942 |
| U.S. States with the Fewest Immigrants | 0 | - | 4.63 | 65,812 |
| U.S. States with the Highest Percentage of Farmland | 0 | - | 4.80 | 65,495 |
| U.S. States with the Lowest Percentage of Farmland | 0 | - | 4.74 | 55,193 |
| Walking Across U.S. State Borders with Hints | 0 | - | 4.74 | 35,048 |
| U.S. States with the Longest International Borders | 0 | - | 4.78 | 45,806 |
| Longest U.S. State Borders | 0 | - | 4.67 | 39,840 |
| Most Valuable Crops by U.S. State | 0 | - | 4.40 | 39,099 |
| Top 10 U.S. States with the Highest Elevation | 0 | - | 4.51 | 67,882 |
| U.S. States with the Lowest Average Elevation | 0 | - | 4.55 | 38,505 |
| U.S. States With the Highest Average Elevation | 0 | - | 4.61 | 32,777 |
| U.S. States with the Fewest Borders | 0 | - | 4.78 | 113,870 |
| U.S. States with the Most Borders | 0 | - | 4.53 | 62,313 |
| Last Names by Country of Origin | 0 | - | 4.64 | 156,543 |
| Flags of North and South America | 0 | - | 4.99 | 373,315 |
| Belize Country Quiz | 0 | - | 4.85 | 20,982 |
| Top U.S. Universities | 0 | - | 4.15 | 145,178 |
| Largest United States Airlines | 0 | - | 4.39 | 55,038 |
| Third Most Common Language by U.S. State | 0 | - | 4.87 | 113,750 |
| U.S. States by Governor | 0 | - | 4.43 | 18,063 |
| U.S. Political Parties in History | 0 | - | 4.44 | 27,703 |
| U.S. Government Agencies | 0 | - | 4.44 | 19,684 |
| Florida Pro Sport Teams | 0 | - | 4.61 | 11,847 |
| Events in U.S. History | 0 | - | 4.41 | 28,679 |
| Countries of Europe - One Minute Sprint | 0 | - | 4.94 | 1,329,121 |
| Most Common Surnames in the UK | 0 | - | 4.22 | 69,698 |
| Georgia ... or Georgia? | 0 | - | 4.67 | 76,795 |
| U.S. Geography by Letter - C | 0 | - | 4.27 | 74,097 |
| U.S. Geography by Letter - A | 0 | - | 4.37 | 63,106 |
| U.S. Geography by Letter - D | 0 | - | 4.09 | 57,103 |
| U.S. Geography by Letter - T | 0 | - | 4.29 | 49,797 |
| U.S. Geography by Letter - P | 0 | - | 4.38 | 53,892 |
| U.S. Geography by Letter - M | 0 | - | 4.14 | 53,338 |
| U.S. Geography by Letter - L | 0 | - | 4.04 | 41,152 |
| U.S. Geography by Letter - G | 0 | - | 4.13 | 39,316 |
| U.S. Geography By Letter - H | 0 | - | 4.35 | 40,154 |
| American Legal Vocabulary | 0 | - | 4.40 | 33,922 |
| U.S. Cities by Picture #1 | 0 | - | 4.36 | 34,573 |
| Cities by Picture #2 | 0 | - | 4.19 | 35,147 |
| 10 U.S. States With The Lowest Murder Rates | 0 | - | 4.50 | 49,480 |
| Biggest Trading Partners - United States | 0 | - | 4.63 | 106,667 |
| The U.S. Government - How Does it Work? | 0 | - | 4.34 | 42,367 |
| American Founding Fathers | 0 | - | 4.42 | 23,229 |
| Famous People from California by Picture | 0 | - | 4.32 | 36,461 |
| Hawaiian Islands Map Quiz | 0 | - | 4.78 | 22,266 |
| Boston Talk to English Translation Quiz | 0 | - | 4.59 | 55,976 |
| People on Money - United States | 0 | - | 4.31 | 63,348 |
| 100 Most Influential Figures in U.S. History | 0 | - | 4.20 | 45,071 |
| Last Names in U.S. History #2 | 0 | - | 4.39 | 17,620 |
| Last 10 U.S. States Alphabetically | 0 | - | 4.35 | 74,860 |
| Top 10 Least Populous U.S. State Capitals | 0 | - | 4.52 | 21,528 |
| 10 U.S. States With The Highest Murder Rates | 0 | - | 4.47 | 54,322 |
| Flyover States | 0 | - | 4.52 | 29,518 |
| U.S. States With Double Letters | 0 | - | 4.55 | 24,130 |
| U.S. States Bigger than Their Neighbors | 0 | - | 4.27 | 76,180 |
| U.S. States by Wikipedia Descriptions #1 | 0 | - | 4.57 | 39,355 |
| U.S. States by Wikipedia Descriptions #2 | 0 | - | 4.48 | 37,109 |
| States and Provinces that touch the Rocky Mountains | 0 | - | 4.43 | 32,507 |
| Name a Valid U.S. State #2 | 0 | - | 4.63 | 77,036 |
| Name a Valid U.S. State #3 | 0 | - | 4.78 | 49,041 |
| U.S. State Superlatives #1 | 0 | - | 4.47 | 87,542 |
| U.S. State Superlatives #2 | 0 | - | 4.53 | 40,638 |
| Musical Acts by State | 0 | - | 4.05 | 19,590 |
| 50 States, 50 Cities - Easy Version | 0 | - | 4.39 | 128,392 |
| Top 10 U.S. States With the Most Tornadoes | 0 | - | 4.53 | 64,769 |
| Top 10 Richest U.S. States by Median Income | 0 | - | 4.47 | 119,115 |
| Top 10 Least Religious U.S. States | 0 | - | 4.51 | 34,314 |
| Top 10 Least-Forested U.S. States | 0 | - | 4.50 | 46,526 |
| Top 10 U.S. States by Public Transit | 0 | - | 4.77 | 63,781 |
| Top 10 U.S. States with the Most Precipitation | 0 | - | 4.46 | 41,709 |
| Famous Italian-Americans | 0 | - | 4.15 | 14,472 |
| Most Common Last Names in Sweden | 0 | - | 4.49 | 15,415 |
| NFL Football Last Names | 0 | - | 4.43 | 171,570 |
| Africa Geography Quiz #1 | 0 | - | 4.93 | 49,349 |
| The Only American Country ... | 0 | - | 4.92 | 121,652 |
| U.S. State Border Crossings | 0 | - | 4.97 | 96,504 |
| U.S. Citizenship Test Questions | 0 | - | 4.83 | 239,509 |
| U.S. Cities with the Most International Tourists | 0 | - | 4.88 | 75,498 |
| Cities and Towns of Massachusetts | 0 | - | 4.92 | 74,106 |
| Who Did that Motown Song? | 0 | - | 4.48 | 13,056 |
| Countries Larger Than Texas but With Fewer People | 0 | - | 4.92 | 39,957 |
| Regions of U.S. States | 0 | - | 4.37 | 43,896 |
| States, Provinces & Territories that Touch the Appalachian Mountains | 0 | - | 4.59 | 20,390 |
| 10 U.S. States with the Most Valuable Crops | 0 | - | 4.41 | 29,579 |
| U.S. States with the Lowest HDI | 0 | - | 4.47 | 28,855 |
| Which U.S. State - Multiple Choice | 0 | - | 4.48 | 20,301 |
| People by U.S. State - Multiple Choice | 0 | - | 4.06 | 9,843 |
| Canada Country Quiz | 0 | - | 4.55 | 132,514 |
| Canada Cities Map Quiz | 0 | - | 4.64 | 124,235 |
| Canada A-Z | 0 | - | 4.73 | 32,843 |
| Asian Countries with the Shortest Names | 0 | - | 4.97 | 135,342 |
| Divided World City Name Puzzle #1 | 0 | - | 4.87 | 48,829 |
| Countries by Initial Letter and Continent #3 | 0 | - | 4.93 | 48,745 |
| Countries by Initial Letter and Continent #2 | 0 | - | 4.91 | 96,232 |
| Category Elimination - African Geography #1 | 0 | - | 4.90 | 92,404 |
| Name a Valid African Country | 0 | - | 4.98 | 154,135 |
| Top 10 Biggest Economies in the Americas | 0 | - | 4.94 | 92,218 |
| Mexico Country Quiz | 0 | - | 4.49 | 72,451 |
| South American Geography Quiz #2 | 0 | - | 4.61 | 39,355 |
| South American Geography Quiz #1 | 0 | - | 4.62 | 32,580 |
| All First-Level Subdivisions of South America on a Map | 0 | - | 4.92 | 53,972 |
| Brazil States Map Quiz | 0 | - | 4.85 | 48,101 |
| States of Brazil | 0 | - | 4.97 | 88,200 |
| Fictional Characters from the Midwest by Picture | 0 | - | 4.04 | 19,199 |
| U.S. States by Picture #1 | 0 | - | 4.21 | 15,447 |
| Random U.S. City to State | 0 | - | 4.45 | 76,338 |
| Most-Visited U.S. Cities | 0 | - | 4.85 | 93,917 |
| Every U.S. Metro Area on a Map | 0 | - | 4.97 | 81,832 |
| Senators Who Ran For President | 0 | - | 4.24 | 17,045 |
| U.S. Electoral College Landslides | 0 | - | 4.35 | 22,040 |
| Geography of California | 0 | - | 4.26 | 10,572 |
| California Pro Sport Teams | 0 | - | 4.19 | 22,690 |
| Chicago City Trivia | 0 | - | 4.31 | 31,456 |
| New York Pro Sport Teams | 0 | - | 4.32 | 25,905 |
| Texas Pro Sport Teams | 0 | - | 4.19 | 16,826 |
| History of Pennsylvania | 0 | - | 4.16 | 7,139 |
| History of Virginia | 0 | - | 4.31 | 11,601 |
| Washington State by Picture | 0 | - | 4.26 | 7,731 |
| Events by U.S. State #1 | 0 | - | 4.43 | 22,910 |
| 10 U.S. States with the Highest Tax Burden | 0 | - | 4.26 | 38,240 |
| Top 10 U.S. States by Manufacturing Employment | 0 | - | 4.49 | 28,821 |
| U.S. States with the Most Venomous Snake Species | 0 | - | 4.47 | 26,433 |
| U.S. States with the Most Endangered Species | 0 | - | 4.50 | 14,361 |
