| Asian Last Names in the United States | 0 | - | 4.43 | 46,768 |
| Countries that Beat the United States | 0 | - | 4.93 | 167,453 |
| U.S. State Nicknames | 0 | - | 4.47 | 50,525 |
| US States Quiz | 0 | - | 5.00 | 16,874,873 |
| Name the U.S. National Parks | 0 | - | 4.86 | 59,942 |
| Total United States Immigration by Country | 0 | - | 4.91 | 111,642 |
| "Do Not Travel" Countries for U.S. Citizens | 0 | - | 4.97 | 244,047 |
| U.S. Cabinet Departments | 0 | - | 4.86 | 72,878 |
| Top 10 Non-English Languages Spoken in New York City | 0 | - | 4.85 | 66,225 |
| States of the U.S. in Alphabetical Order | 0 | - | 4.98 | 367,041 |
| All 3,143 Counties of the United States on a Map | 0 | - | 4.97 | 331,989 |
| Pixelated United States Map | 0 | - | 4.87 | 94,265 |
| Most-Visited Countries by Americans | 0 | - | 4.86 | 109,678 |
| Countries that Visit the United States the Most | 0 | - | 4.96 | 91,766 |
| Deadliest U.S. Wars | 0 | - | 4.89 | 190,797 |
| The 13 Colonies Quiz | 0 | - | 4.97 | 117,857 |
| U.S. States with the Letter Y | 0 | - | 4.85 | 111,422 |
| 10 Southernmost U.S. States | 0 | - | 4.88 | 113,429 |
| U.S. States with Short Names | 0 | - | 4.91 | 148,996 |
| U.S. States that Start with M | 0 | - | 4.93 | 187,286 |
| U.S. States By Population | 0 | - | 4.92 | 153,540 |
| U.S. States that Start with N | 0 | - | 4.95 | 171,443 |
| U.S. States with Longest Names | 0 | - | 4.84 | 44,437 |
| U.S. States with a Unique First Letter | 0 | - | 4.96 | 88,299 |
| 10 Westernmost U.S. States | 0 | - | 4.95 | 64,210 |
| The Only Remaining U.S. State . . . | 0 | - | 4.93 | 65,613 |
| US States with an Empty Map | 0 | - | 5.00 | 624,594 |
| 10 Longest Rivers in the United States | 0 | - | 4.85 | 39,174 |
| Countries Closest to United States by Continent | 0 | - | 4.99 | 146,448 |
| Louisiana Purchase with a Map | 0 | - | 4.96 | 48,605 |
| Top 10 Most-Visited U.S. States | 0 | - | 4.90 | 101,760 |
| U.S. States with the Most Immigrants | 0 | - | 4.85 | 82,470 |
| Countries that Beat Canada | 0 | - | 4.91 | 97,434 |
| U.S. States or European Countries by Area | 0 | - | 4.95 | 96,035 |
| U.S. States or European Countries by Population | 0 | - | 4.97 | 133,204 |
| Name a Valid U.S. State #1 | 0 | - | 4.93 | 208,909 |
| Top 10 Coldest U.S. States | 0 | - | 4.94 | 124,645 |
| Top 10 Hottest U.S. States | 0 | - | 4.86 | 125,651 |
| Top 10 Most Native American U.S. States | 0 | - | 4.87 | 92,025 |
| Top 10 U.S. States with the Least Precipitation | 0 | - | 4.82 | 61,906 |
| American Countries with the Shortest Names | 0 | - | 4.96 | 121,123 |
| Hispanic Last Names in the U.S. | 0 | - | 4.31 | 54,751 |
| States of Mexico | 0 | - | 4.96 | 176,092 |
| Mexico States Map Quiz | 0 | - | 4.85 | 104,734 |
| Midwestern States of the U.S. | 0 | - | 4.88 | 13,788 |
| Mexico Cities Map Quiz | 0 | - | 4.83 | 38,542 |
| Countries with American Expatriates | 0 | - | 4.53 | 42,584 |
| United States Landmarks Map Quiz | 0 | - | 4.55 | 40,173 |
| United States Country Quiz | 0 | - | 4.43 | 101,511 |
| Busiest Air Routes from the U.S. | 0 | - | 4.46 | 76,879 |
| California Groups of Things | 0 | - | 4.25 | 45,491 |
| New York Groups of Things | 0 | - | 4.35 | 63,700 |
| U.S. History Groups of Two | 0 | - | 4.23 | 44,458 |
| Most-Visited Countries by Canadians | 0 | - | 4.82 | 39,383 |
| Countries Closest to Canada | 0 | - | 4.91 | 198,344 |
| Asian Countries Americans Travel to the Most | 0 | - | 4.75 | 59,976 |
| U.S. Geography by Letter - B | 0 | - | 4.53 | 69,418 |
| U.S. Geography by Letter - S | 0 | - | 4.55 | 52,863 |
| Two Letter U.S. State Abbreviations | 0 | - | 4.19 | 747,130 |
| Names of Generations | 0 | - | 4.09 | 44,902 |
| Countries Closest to the U. S. | 0 | - | 4.41 | 209,465 |
| U.S. Federal Agency Acronyms | 0 | - | 4.50 | 79,982 |
| Top 10 Non-English Languages of Los Angeles | 0 | - | 4.42 | 59,883 |
| 10 Closest Megacities to New York City | 0 | - | 4.52 | 67,348 |
| Last Names in U.S. History #1 | 0 | - | 4.25 | 36,242 |
| New England States | 0 | - | 4.51 | 59,808 |
| U.S. States by Land Area | 0 | - | 4.61 | 52,812 |
| Top 10 U.S. States by Inland Water Area | 0 | - | 4.53 | 38,010 |
| Add a Letter - Make a U.S. State | 0 | - | 4.72 | 82,815 |
| Top 10 Widest U.S. States East to West | 0 | - | 4.70 | 56,004 |
| Top 10 Tallest U.S. States North to South | 0 | - | 4.74 | 40,927 |
| U.S. States by Borders | 0 | - | 4.61 | 35,315 |
| 10 Easternmost U.S. States | 0 | - | 4.53 | 56,482 |
| The Only U.S. State ... #1 | 0 | - | 4.52 | 102,039 |
| Movies by State | 0 | - | 4.27 | 40,542 |
| 50 States, 50 Cities - Hard Version | 0 | - | 4.46 | 44,222 |
| United States Map Quiz | 0 | - | 4.98 | 4,158,446 |
| U.S. License Plates Picture Quiz | 0 | - | 4.61 | 52,927 |
| U.S. States with the Fewest Immigrants | 0 | - | 4.63 | 65,795 |
| U.S. States with the Highest Percentage of Farmland | 0 | - | 4.80 | 65,485 |
| U.S. States with the Lowest Percentage of Farmland | 0 | - | 4.74 | 55,187 |
| Walking Across U.S. State Borders with Hints | 0 | - | 4.74 | 35,044 |
| U.S. States with the Longest International Borders | 0 | - | 4.78 | 45,797 |
| Longest U.S. State Borders | 0 | - | 4.67 | 39,818 |
| Most Valuable Crops by U.S. State | 0 | - | 4.40 | 39,092 |
| Top 10 U.S. States with the Highest Elevation | 0 | - | 4.51 | 67,874 |
| U.S. States with the Lowest Average Elevation | 0 | - | 4.55 | 38,494 |
| U.S. States With the Highest Average Elevation | 0 | - | 4.61 | 32,774 |
| U.S. States with the Fewest Borders | 0 | - | 4.78 | 113,847 |
| U.S. States with the Most Borders | 0 | - | 4.53 | 62,304 |
| Last Names by Country of Origin | 0 | - | 4.64 | 156,497 |
| Flags of North and South America | 0 | - | 4.99 | 373,096 |
| Belize Country Quiz | 0 | - | 4.85 | 20,973 |
| Top U.S. Universities | 0 | - | 4.15 | 145,129 |
| Largest United States Airlines | 0 | - | 4.39 | 55,028 |
| Third Most Common Language by U.S. State | 0 | - | 4.87 | 113,732 |
| U.S. States by Governor | 0 | - | 4.43 | 18,063 |
| U.S. Political Parties in History | 0 | - | 4.44 | 27,695 |
| U.S. Government Agencies | 0 | - | 4.44 | 19,680 |
| Florida Pro Sport Teams | 0 | - | 4.61 | 11,843 |
| Events in U.S. History | 0 | - | 4.41 | 28,672 |
| Countries of Europe - One Minute Sprint | 0 | - | 4.94 | 1,328,697 |
| Most Common Surnames in the UK | 0 | - | 4.22 | 69,680 |
| Georgia ... or Georgia? | 0 | - | 4.67 | 76,767 |
| U.S. Geography by Letter - C | 0 | - | 4.27 | 74,084 |
| U.S. Geography by Letter - A | 0 | - | 4.37 | 63,093 |
| U.S. Geography by Letter - D | 0 | - | 4.09 | 57,086 |
| U.S. Geography by Letter - T | 0 | - | 4.29 | 49,778 |
| U.S. Geography by Letter - P | 0 | - | 4.38 | 53,862 |
| U.S. Geography by Letter - M | 0 | - | 4.14 | 53,329 |
| U.S. Geography by Letter - L | 0 | - | 4.04 | 41,134 |
| U.S. Geography by Letter - G | 0 | - | 4.13 | 39,304 |
| U.S. Geography By Letter - H | 0 | - | 4.35 | 40,127 |
| American Legal Vocabulary | 0 | - | 4.40 | 33,916 |
| U.S. Cities by Picture #1 | 0 | - | 4.36 | 34,559 |
| Cities by Picture #2 | 0 | - | 4.19 | 35,142 |
| 10 U.S. States With The Lowest Murder Rates | 0 | - | 4.51 | 45,527 |
| Biggest Trading Partners - United States | 0 | - | 4.63 | 106,661 |
| The U.S. Government - How Does it Work? | 0 | - | 4.34 | 42,362 |
| American Founding Fathers | 0 | - | 4.42 | 23,224 |
| Famous People from California by Picture | 0 | - | 4.32 | 36,445 |
| Hawaiian Islands Map Quiz | 0 | - | 4.78 | 22,264 |
| Boston Talk to English Translation Quiz | 0 | - | 4.59 | 55,971 |
| People on Money - United States | 0 | - | 4.31 | 63,344 |
| 100 Most Influential Figures in U.S. History | 0 | - | 4.20 | 45,053 |
| Last Names in U.S. History #2 | 0 | - | 4.39 | 17,613 |
| Last 10 U.S. States Alphabetically | 0 | - | 4.35 | 74,846 |
| Top 10 Least Populous U.S. State Capitals | 0 | - | 4.52 | 21,522 |
| 10 U.S. States With The Highest Murder Rates | 0 | - | 4.47 | 54,204 |
| Flyover States | 0 | - | 4.52 | 29,513 |
| U.S. States With Double Letters | 0 | - | 4.55 | 24,123 |
| U.S. States Bigger than Their Neighbors | 0 | - | 4.27 | 76,161 |
| U.S. States by Wikipedia Descriptions #1 | 0 | - | 4.57 | 39,344 |
| U.S. States by Wikipedia Descriptions #2 | 0 | - | 4.48 | 37,100 |
| States and Provinces that touch the Rocky Mountains | 0 | - | 4.43 | 32,500 |
| Name a Valid U.S. State #2 | 0 | - | 4.63 | 77,018 |
| Name a Valid U.S. State #3 | 0 | - | 4.78 | 49,034 |
| U.S. State Superlatives #1 | 0 | - | 4.47 | 87,530 |
| U.S. State Superlatives #2 | 0 | - | 4.53 | 40,632 |
| Musical Acts by State | 0 | - | 4.05 | 19,590 |
| 50 States, 50 Cities - Easy Version | 0 | - | 4.39 | 128,375 |
| Top 10 U.S. States With the Most Tornadoes | 0 | - | 4.53 | 64,745 |
| Top 10 Richest U.S. States by Median Income | 0 | - | 4.47 | 119,096 |
| Top 10 Least Religious U.S. States | 0 | - | 4.51 | 34,301 |
| Top 10 Least-Forested U.S. States | 0 | - | 4.50 | 46,521 |
| Top 10 U.S. States by Public Transit | 0 | - | 4.77 | 63,768 |
| Top 10 U.S. States with the Most Precipitation | 0 | - | 4.46 | 41,700 |
| Famous Italian-Americans | 0 | - | 4.15 | 14,462 |
| Most Common Last Names in Sweden | 0 | - | 4.49 | 15,398 |
| NFL Football Last Names | 0 | - | 4.43 | 171,543 |
| Africa Geography Quiz #1 | 0 | - | 4.93 | 49,335 |
| The Only American Country ... | 0 | - | 4.92 | 121,604 |
| U.S. State Border Crossings | 0 | - | 4.97 | 96,479 |
| U.S. Citizenship Test Questions | 0 | - | 4.83 | 239,457 |
| U.S. Cities with the Most International Tourists | 0 | - | 4.88 | 75,467 |
| Cities and Towns of Massachusetts | 0 | - | 4.92 | 74,028 |
| Who Did that Motown Song? | 0 | - | 4.48 | 13,052 |
| Countries Larger Than Texas but With Fewer People | 0 | - | 4.92 | 39,938 |
| Regions of U.S. States | 0 | - | 4.37 | 43,876 |
| States, Provinces & Territories that Touch the Appalachian Mountains | 0 | - | 4.59 | 20,387 |
| 10 U.S. States with the Most Valuable Crops | 0 | - | 4.41 | 29,572 |
| U.S. States with the Lowest HDI | 0 | - | 4.47 | 28,850 |
| Which U.S. State - Multiple Choice | 0 | - | 4.48 | 20,294 |
| People by U.S. State - Multiple Choice | 0 | - | 4.06 | 9,840 |
| Canada Country Quiz | 0 | - | 4.54 | 132,479 |
| Canada Cities Map Quiz | 0 | - | 4.63 | 124,206 |
| Canada A-Z | 0 | - | 4.73 | 32,835 |
| Asian Countries with the Shortest Names | 0 | - | 4.97 | 135,287 |
| Divided World City Name Puzzle #1 | 0 | - | 4.87 | 48,774 |
| Countries by Initial Letter and Continent #3 | 0 | - | 4.93 | 48,689 |
| Countries by Initial Letter and Continent #2 | 0 | - | 4.91 | 96,205 |
| Category Elimination - African Geography #1 | 0 | - | 4.90 | 92,350 |
| Name a Valid African Country | 0 | - | 4.98 | 154,071 |
| Top 10 Biggest Economies in the Americas | 0 | - | 4.94 | 92,178 |
| Mexico Country Quiz | 0 | - | 4.49 | 72,424 |
| South American Geography Quiz #2 | 0 | - | 4.61 | 39,346 |
| South American Geography Quiz #1 | 0 | - | 4.62 | 32,576 |
| All First-Level Subdivisions of South America on a Map | 0 | - | 4.92 | 53,911 |
| Brazil States Map Quiz | 0 | - | 4.85 | 48,053 |
| States of Brazil | 0 | - | 4.97 | 88,050 |
| Fictional Characters from the Midwest by Picture | 0 | - | 4.04 | 19,198 |
| U.S. States by Picture #1 | 0 | - | 4.21 | 15,439 |
| Random U.S. City to State | 0 | - | 4.45 | 76,329 |
| Most-Visited U.S. Cities | 0 | - | 4.85 | 93,830 |
| Every U.S. Metro Area on a Map | 0 | - | 4.97 | 81,790 |
| Senators Who Ran For President | 0 | - | 4.24 | 17,041 |
| U.S. Electoral College Landslides | 0 | - | 4.35 | 22,038 |
| Geography of California | 0 | - | 4.26 | 10,566 |
| California Pro Sport Teams | 0 | - | 4.19 | 22,688 |
| Chicago City Trivia | 0 | - | 4.31 | 31,446 |
| New York Pro Sport Teams | 0 | - | 4.32 | 25,899 |
| Texas Pro Sport Teams | 0 | - | 4.19 | 16,824 |
| History of Pennsylvania | 0 | - | 4.16 | 7,135 |
| History of Virginia | 0 | - | 4.31 | 11,599 |
| Washington State by Picture | 0 | - | 4.26 | 7,728 |
| Events by U.S. State #1 | 0 | - | 4.43 | 22,910 |
| 10 U.S. States with the Highest Tax Burden | 0 | - | 4.26 | 38,234 |
| Top 10 U.S. States by Manufacturing Employment | 0 | - | 4.49 | 28,817 |
| U.S. States with the Most Venomous Snake Species | 0 | - | 4.47 | 26,427 |
| U.S. States with the Most Endangered Species | 0 | - | 4.50 | 14,358 |
