| Most Common U.S. Last Names - Extreme | 0 | - | 4.94 | 173,334 |
| Countries that Beat the United States | 0 | - | 4.93 | 165,716 |
| U.S. State Nicknames Quiz | 0 | - | 4.47 | 50,309 |
| US States Quiz | 0 | - | 5.00 | 16,722,151 |
| Name the U.S. National Parks | 0 | - | 4.86 | 59,239 |
| Total United States Immigration by Country | 0 | - | 4.91 | 110,754 |
| "Do Not Travel" Countries for U.S. Citizens | 0 | - | 4.97 | 241,263 |
| U.S. Cabinet Departments | 0 | - | 4.86 | 72,564 |
| Top 10 Non-English Languages Spoken in New York City | 0 | - | 4.84 | 65,702 |
| States of the U.S. in Alphabetical Order | 0 | - | 4.98 | 365,474 |
| All 3,143 Counties of the United States on a Map | 0 | - | 4.97 | 328,564 |
| Asian Last Names in the United States | 0 | - | 4.43 | 46,542 |
| Pixelated United States Map | 0 | - | 4.89 | 93,584 |
| Most-Visited Countries by Americans | 0 | - | 4.87 | 108,610 |
| Countries that Visit the United States the Most | 0 | - | 4.96 | 90,952 |
| Deadliest U.S. Wars | 0 | - | 4.89 | 189,403 |
| The 13 Colonies Quiz | 0 | - | 4.97 | 116,862 |
| U.S. States with the Letter Y | 0 | - | 4.85 | 110,485 |
| 10 Southernmost U.S. States | 0 | - | 4.88 | 112,526 |
| U.S. States with Short Names | 0 | - | 4.91 | 147,819 |
| U.S. States that Start with M | 0 | - | 4.93 | 186,071 |
| U.S. States By Population | 0 | - | 4.92 | 152,472 |
| U.S. States that Start with N | 0 | - | 4.95 | 170,525 |
| U.S. States with Longest Names | 0 | - | 4.84 | 43,946 |
| U.S. States with a Unique First Letter | 0 | - | 4.96 | 87,642 |
| 10 Westernmost U.S. States | 0 | - | 4.95 | 63,803 |
| The Only Remaining U.S. State . . . | 0 | - | 4.92 | 64,962 |
| US States with an Empty Map | 0 | - | 5.00 | 619,517 |
| 10 Longest Rivers in the United States | 0 | - | 4.85 | 38,840 |
| Countries Closest to United States by Continent | 0 | - | 4.99 | 145,536 |
| Louisiana Purchase with a Map | 0 | - | 4.96 | 47,703 |
| Top 10 Most-Visited U.S. States | 0 | - | 4.90 | 101,162 |
| U.S. States with the Most Immigrants | 0 | - | 4.85 | 81,996 |
| Countries that Beat Canada | 0 | - | 4.90 | 86,932 |
| U.S. States or European Countries by Area | 0 | - | 4.95 | 94,881 |
| U.S. States or European Countries by Population | 0 | - | 4.97 | 132,086 |
| Name a Valid U.S. State #1 | 0 | - | 4.93 | 206,959 |
| Top 10 Coldest U.S. States | 0 | - | 4.94 | 123,984 |
| Top 10 Hottest U.S. States | 0 | - | 4.86 | 124,792 |
| Top 10 Most Native American U.S. States | 0 | - | 4.87 | 91,191 |
| Top 10 U.S. States with the Least Precipitation | 0 | - | 4.82 | 61,598 |
| American Countries with the Shortest Names | 0 | - | 4.96 | 120,426 |
| States of Mexico | 0 | - | 4.95 | 173,666 |
| Mexico States Map Quiz | 0 | - | 4.84 | 103,933 |
| Countries with American Expatriates | 0 | - | 4.53 | 42,487 |
| United States Landmarks Map Quiz | 0 | - | 4.55 | 40,093 |
| United States Country Quiz | 0 | - | 4.43 | 100,717 |
| Busiest Air Routes from the U.S. | 0 | - | 4.46 | 76,643 |
| California Groups of Things | 0 | - | 4.25 | 45,288 |
| New York Groups of Things | 0 | - | 4.38 | 59,964 |
| U.S. History Groups of Two | 0 | - | 4.23 | 44,271 |
| Countries Closest to Canada | 0 | - | 4.90 | 197,459 |
| Asian Countries Americans Travel to the Most | 0 | - | 4.75 | 59,684 |
| U.S. Geography by Letter - B | 0 | - | 4.53 | 68,803 |
| U.S. Geography by Letter - S | 0 | - | 4.54 | 52,305 |
| Two Letter U.S. State Abbreviations | 0 | - | 4.19 | 743,650 |
| Countries Closest to the U. S. | 0 | - | 4.41 | 208,018 |
| U.S. Federal Agency Acronyms | 0 | - | 4.50 | 79,770 |
| Top 10 Non-English Languages of Los Angeles | 0 | - | 4.42 | 59,629 |
| 10 Closest Megacities to New York City | 0 | - | 4.52 | 67,210 |
| New England States | 0 | - | 4.51 | 59,715 |
| U.S. States by Land Area | 0 | - | 4.61 | 52,524 |
| Top 10 U.S. States by Inland Water Area | 0 | - | 4.53 | 37,897 |
| Add a Letter - Make a U.S. State | 0 | - | 4.72 | 82,378 |
| Top 10 Widest U.S. States East to West | 0 | - | 4.69 | 55,687 |
| Top 10 Tallest U.S. States North to South | 0 | - | 4.74 | 40,690 |
| U.S. States by Borders | 0 | - | 4.63 | 35,106 |
| 10 Easternmost U.S. States | 0 | - | 4.53 | 56,265 |
| The Only U.S. State ... #1 | 0 | - | 4.52 | 101,173 |
| Movies by State | 0 | - | 4.27 | 40,454 |
| 50 States, 50 Cities - Hard Version | 0 | - | 4.46 | 44,016 |
| Hispanic Last Names in the U.S. | 0 | - | 4.31 | 54,627 |
| United States Map Quiz | 0 | - | 4.98 | 4,143,655 |
| U.S. License Plates Picture Quiz | 0 | - | 4.59 | 52,688 |
| U.S. States with the Fewest Immigrants | 0 | - | 4.63 | 65,466 |
| U.S. States with the Highest Percentage of Farmland | 0 | - | 4.80 | 65,303 |
| U.S. States with the Lowest Percentage of Farmland | 0 | - | 4.74 | 55,049 |
| Walking Across U.S. State Borders with Hints | 0 | - | 4.74 | 34,941 |
| U.S. States with the Longest International Borders | 0 | - | 4.78 | 45,612 |
| Longest U.S. State Borders | 0 | - | 4.67 | 39,437 |
| Most Valuable Crops by U.S. State | 0 | - | 4.40 | 38,943 |
| Top 10 U.S. States with the Highest Elevation | 0 | - | 4.51 | 67,784 |
| U.S. States with the Lowest Average Elevation | 0 | - | 4.55 | 38,405 |
| U.S. States With the Highest Average Elevation | 0 | - | 4.61 | 32,679 |
| U.S. States with the Fewest Borders | 0 | - | 4.77 | 113,098 |
| U.S. States with the Most Borders | 0 | - | 4.53 | 62,237 |
| Flags of North and South America | 0 | - | 4.99 | 368,148 |
| Belize Country Quiz | 0 | - | 4.85 | 20,826 |
| Top U.S. Universities | 0 | - | 4.15 | 144,206 |
| Largest United States Airlines | 0 | - | 4.39 | 54,859 |
| Third Most Common Language by U.S. State | 0 | - | 4.87 | 113,414 |
| U.S. States by Governor | 0 | - | 4.43 | 17,992 |
| U.S. Political Parties in History | 0 | - | 4.44 | 27,588 |
| U.S. Government Agencies | 0 | - | 4.44 | 19,562 |
| Florida Pro Sport Teams | 0 | - | 4.61 | 11,768 |
| Countries of Europe - One Minute Sprint | 0 | - | 4.94 | 1,320,883 |
| Most Common First Names in Spain | 0 | - | 4.27 | 45,486 |
| Georgia ... or Georgia? | 0 | - | 4.69 | 76,464 |
| U.S. Geography by Letter - C | 0 | - | 4.27 | 73,575 |
| U.S. Geography by Letter - A | 0 | - | 4.38 | 62,543 |
| U.S. Geography by Letter - D | 0 | - | 4.08 | 56,546 |
| U.S. Geography by Letter - T | 0 | - | 4.28 | 49,207 |
| U.S. Geography by Letter - P | 0 | - | 4.35 | 47,629 |
| U.S. Geography by Letter - M | 0 | - | 4.14 | 52,814 |
| U.S. Geography by Letter - L | 0 | - | 4.04 | 40,628 |
| U.S. Geography by Letter - G | 0 | - | 4.13 | 38,787 |
| U.S. Geography By Letter - H | 0 | - | 4.35 | 39,553 |
| Names of Generations | 0 | - | 4.01 | 22,374 |
| American Legal Vocabulary | 0 | - | 4.40 | 33,802 |
| U.S. Cities by Picture #1 | 0 | - | 4.37 | 34,378 |
| Cities by Picture #2 | 0 | - | 4.19 | 34,959 |
| 10 U.S. States With The Lowest Murder Rates | 0 | - | 4.51 | 40,689 |
| Biggest Trading Partners - United States | 0 | - | 4.63 | 106,393 |
| The U.S. Government - How Does it Work? | 0 | - | 4.34 | 42,195 |
| American Founding Fathers | 0 | - | 4.41 | 23,084 |
| Famous People from California by Picture | 0 | - | 4.32 | 36,176 |
| Hawaiian Islands Map Quiz | 0 | - | 4.78 | 22,209 |
| People on Money - United States | 0 | - | 4.31 | 63,224 |
| 100 Most Influential Figures in U.S. History | 0 | - | 4.20 | 44,755 |
| Last 10 U.S. States Alphabetically | 0 | - | 4.35 | 74,638 |
| Top 10 Least Populous U.S. State Capitals | 0 | - | 4.52 | 21,470 |
| 10 U.S. States With The Highest Murder Rates | 0 | - | 4.46 | 52,884 |
| Flyover States | 0 | - | 4.52 | 29,413 |
| U.S. States With Double Letters | 0 | - | 4.54 | 23,949 |
| U.S. States Bigger than Their Neighbors | 0 | - | 4.27 | 75,858 |
| U.S. States by Wikipedia Descriptions #1 | 0 | - | 4.57 | 39,218 |
| U.S. States by Wikipedia Descriptions #2 | 0 | - | 4.47 | 36,989 |
| States and Provinces that touch the Rocky Mountains | 0 | - | 4.42 | 32,425 |
| Name a Valid U.S. State #2 | 0 | - | 4.63 | 76,544 |
| Name a Valid U.S. State #3 | 0 | - | 4.78 | 48,739 |
| U.S. State Superlatives #1 | 0 | - | 4.47 | 87,300 |
| U.S. State Superlatives #2 | 0 | - | 4.53 | 40,494 |
| Musical Acts by State | 0 | - | 4.05 | 19,560 |
| 50 States, 50 Cities - Easy Version | 0 | - | 4.39 | 128,028 |
| Top 10 U.S. States With the Most Tornadoes | 0 | - | 4.53 | 64,479 |
| Top 10 Richest U.S. States by Median Income | 0 | - | 4.47 | 118,595 |
| Top 10 Least Religious U.S. States | 0 | - | 4.51 | 34,119 |
| Top 10 Least-Forested U.S. States | 0 | - | 4.50 | 46,349 |
| Top 10 U.S. States by Public Transit | 0 | - | 4.77 | 63,452 |
| Top 10 U.S. States with the Most Precipitation | 0 | - | 4.46 | 41,584 |
| Famous Italian-Americans | 0 | - | 4.15 | 14,326 |
| Africa Geography Quiz #1 | 0 | - | 4.93 | 49,029 |
| The Only American Country ... | 0 | - | 4.92 | 120,858 |
| U.S. State Border Crossings | 0 | - | 4.97 | 96,023 |
| U.S. Citizenship Test Questions | 0 | - | 4.83 | 238,464 |
| U.S. Cities with the Most International Tourists | 0 | - | 4.88 | 74,947 |
| Cities and Towns of Massachusetts | 0 | - | 4.92 | 73,149 |
| Who Did that Motown Song? | 0 | - | 4.48 | 13,024 |
| Countries Larger Than Texas but With Fewer People | 0 | - | 4.92 | 39,553 |
| Last Names in U.S. History #1 | 0 | - | 4.25 | 36,093 |
| Regions of U.S. States | 0 | - | 4.37 | 43,525 |
| States, Provinces & Territories that Touch the Appalachian Mountains | 0 | - | 4.59 | 20,345 |
| 10 U.S. States with the Most Valuable Crops | 0 | - | 4.41 | 29,501 |
| U.S. States with the Lowest HDI | 0 | - | 4.46 | 28,777 |
| Which U.S. State - Multiple Choice | 0 | - | 4.48 | 20,210 |
| People by U.S. State - Multiple Choice | 0 | - | 4.06 | 9,804 |
| Canada Country Quiz | 0 | - | 4.55 | 131,824 |
| Canada Cities Map Quiz | 0 | - | 4.63 | 123,689 |
| Canada A-Z | 0 | - | 4.73 | 32,672 |
| Asian Countries with the Shortest Names | 0 | - | 4.97 | 134,471 |
| Divided World City Name Puzzle #1 | 0 | - | 4.88 | 48,158 |
| Actors by Last Name #1 | 0 | - | 4.28 | 68,228 |
| Actresses by Last Name #1 | 0 | - | 4.25 | 63,448 |
| Actors by Last Name #2 | 0 | - | 4.01 | 58,751 |
| Countries by Initial Letter and Continent #3 | 0 | - | 4.93 | 47,828 |
| Countries by Initial Letter and Continent #2 | 0 | - | 4.91 | 95,711 |
| Category Elimination - African Geography #1 | 0 | - | 4.90 | 91,195 |
| Name a Valid African Country | 0 | - | 4.98 | 153,072 |
| Top 10 Biggest Economies in the Americas | 0 | - | 4.93 | 91,162 |
| Mexico Country Quiz | 0 | - | 4.49 | 72,036 |
| Mexico Cities Map Quiz | 0 | - | 4.77 | 33,327 |
| South American Geography Quiz #2 | 0 | - | 4.61 | 39,214 |
| South American Geography Quiz #1 | 0 | - | 4.73 | 32,484 |
| All First-Level Subdivisions of South America on a Map | 0 | - | 4.92 | 53,095 |
| Brazil States Map Quiz | 0 | - | 4.85 | 47,473 |
| States of Brazil | 0 | - | 4.98 | 86,594 |
| Fictional Characters from the Midwest by Picture | 0 | - | 4.04 | 19,161 |
| U.S. States by Picture #1 | 0 | - | 4.21 | 15,368 |
| Random U.S. City to State | 0 | - | 4.45 | 75,437 |
| Most-Visited U.S. Cities | 0 | - | 4.85 | 92,551 |
| Every U.S. Metro Area on a Map | 0 | - | 4.97 | 80,890 |
| Senators Who Ran For President | 0 | - | 4.24 | 16,997 |
| U.S. Electoral College Landslides | 0 | - | 4.35 | 21,987 |
| Geography of California | 0 | - | 4.25 | 10,509 |
| California Pro Sport Teams | 0 | - | 4.19 | 22,652 |
| Chicago City Trivia | 0 | - | 4.31 | 31,390 |
| New York Pro Sport Teams | 0 | - | 4.32 | 25,813 |
| Texas Pro Sport Teams | 0 | - | 4.19 | 16,784 |
| History of Pennsylvania | 0 | - | 4.16 | 7,093 |
| History of Virginia | 0 | - | 4.31 | 11,560 |
| Washington State by Picture | 0 | - | 4.26 | 7,688 |
| Events in U.S. History | 0 | - | 4.40 | 28,504 |
| Events by U.S. State #1 | 0 | - | 4.43 | 22,841 |
| 10 U.S. States with the Highest Tax Burden | 0 | - | 4.26 | 38,052 |
| Top 10 U.S. States by Manufacturing Employment | 0 | - | 4.49 | 28,746 |
| U.S. States with the Most Venomous Snake Species | 0 | - | 4.47 | 26,323 |
| U.S. States with the Most Endangered Species | 0 | - | 4.50 | 14,330 |
| African-American Historical Figures | 0 | - | 4.18 | 17,135 |
| Canadian Prime Ministers | 0 | - | 4.63 | 57,128 |
| Capitals of Canadian Provinces | 0 | - | 4.85 | 88,495 |
