| U.S. Cabinet Departments | 0 | - | 4.86 | 72,841 |
| Deadliest U.S. Wars | 0 | - | 4.89 | 190,680 |
| US States Quiz | 0 | - | 5.00 | 16,856,167 |
| Name the U.S. National Parks | 0 | - | 4.86 | 59,878 |
| Total United States Immigration by Country | 0 | - | 4.91 | 111,502 |
| Most Common U.S. Last Names - Extreme | 0 | - | 4.94 | 174,346 |
| "Do Not Travel" Countries for U.S. Citizens | 0 | - | 4.97 | 243,655 |
| Top 10 Non-English Languages Spoken in New York City | 0 | - | 4.85 | 66,166 |
| States of the U.S. in Alphabetical Order | 0 | - | 4.98 | 366,839 |
| Top 10 Coldest U.S. States | 0 | - | 4.94 | 124,583 |
| Top 10 Hottest U.S. States | 0 | - | 4.86 | 125,540 |
| Top 10 U.S. States with the Least Precipitation | 0 | - | 4.82 | 61,864 |
| All 3,143 Counties of the United States on a Map | 0 | - | 4.97 | 331,565 |
| Pixelated United States Map | 0 | - | 4.87 | 94,179 |
| Most-Visited Countries by Americans | 0 | - | 4.86 | 109,533 |
| Countries that Visit the United States the Most | 0 | - | 4.96 | 91,657 |
| The 13 Colonies Quiz | 0 | - | 4.97 | 117,767 |
| U.S. States with the Letter Y | 0 | - | 4.85 | 111,302 |
| 10 Southernmost U.S. States | 0 | - | 4.88 | 113,330 |
| U.S. States with Short Names | 0 | - | 4.91 | 148,863 |
| U.S. States that Start with M | 0 | - | 4.93 | 187,133 |
| U.S. States By Population | 0 | - | 4.92 | 153,474 |
| U.S. States that Start with N | 0 | - | 4.95 | 171,338 |
| U.S. States with Longest Names | 0 | - | 4.84 | 44,391 |
| U.S. States with a Unique First Letter | 0 | - | 4.96 | 88,232 |
| 10 Westernmost U.S. States | 0 | - | 4.95 | 64,164 |
| The Only Remaining U.S. State . . . | 0 | - | 4.93 | 65,552 |
| US States with an Empty Map | 0 | - | 5.00 | 623,982 |
| Midwestern States of the U.S. | 0 | - | 4.88 | 13,719 |
| 10 Longest Rivers in the United States | 0 | - | 4.85 | 39,141 |
| Countries Closest to United States by Continent | 0 | - | 4.99 | 146,308 |
| Countries that Beat the United States | 0 | - | 4.93 | 166,897 |
| Louisiana Purchase with a Map | 0 | - | 4.96 | 48,507 |
| Top 10 Most-Visited U.S. States | 0 | - | 4.90 | 101,679 |
| U.S. States with the Most Immigrants | 0 | - | 4.85 | 82,417 |
| U.S. States or European Countries by Area | 0 | - | 4.95 | 95,903 |
| U.S. States or European Countries by Population | 0 | - | 4.97 | 133,066 |
| Name a Valid U.S. State #1 | 0 | - | 4.93 | 208,690 |
| Top 10 Most Native American U.S. States | 0 | - | 4.87 | 91,912 |
| U.S. Federal Agency Acronyms | 0 | - | 4.50 | 79,954 |
| Top 10 Biggest Economies in the Americas | 0 | - | 4.94 | 92,096 |
| States of Mexico | 0 | - | 4.95 | 175,799 |
| Mexico States Map Quiz | 0 | - | 4.85 | 104,642 |
| Top U.S. Universities | 0 | - | 4.15 | 145,013 |
| 10 U.S. States With The Lowest Murder Rates | 0 | - | 4.51 | 42,091 |
| Biggest Trading Partners - United States | 0 | - | 4.63 | 106,630 |
| U.S. States by Governor | 0 | - | 4.43 | 18,056 |
| U.S. Political Parties in History | 0 | - | 4.44 | 27,686 |
| U.S. Government Agencies | 0 | - | 4.44 | 19,665 |
| 10 U.S. States With The Highest Murder Rates | 0 | - | 4.47 | 54,045 |
| U.S. State Superlatives #1 | 0 | - | 4.47 | 87,502 |
| U.S. State Superlatives #2 | 0 | - | 4.53 | 40,618 |
| Top 10 U.S. States With the Most Tornadoes | 0 | - | 4.53 | 64,719 |
| Top 10 Least Religious U.S. States | 0 | - | 4.51 | 34,286 |
| Top 10 U.S. States by Public Transit | 0 | - | 4.77 | 63,730 |
| Top 10 U.S. States with the Most Precipitation | 0 | - | 4.46 | 41,687 |
| Top 10 Richest Countries in the Americas | 0 | - | 4.93 | 83,789 |
| Mexico Cities Map Quiz | 0 | - | 4.83 | 38,480 |
| U.S. State Nicknames | 0 | - | 4.47 | 50,485 |
| Countries with American Expatriates | 0 | - | 4.53 | 42,574 |
| United States Landmarks Map Quiz | 0 | - | 4.55 | 40,164 |
| United States Country Quiz | 0 | - | 4.43 | 101,436 |
| Busiest Air Routes from the U.S. | 0 | - | 4.46 | 76,855 |
| The U.S. Government - How Does it Work? | 0 | - | 4.34 | 42,344 |
| 100 Most Influential Figures in U.S. History | 0 | - | 4.20 | 45,028 |
| Most-Visited Countries by Canadians | 0 | - | 4.82 | 39,333 |
| Countries Closest to Canada | 0 | - | 4.91 | 198,218 |
| Asian Countries Americans Travel to the Most | 0 | - | 4.75 | 59,942 |
| U.S. Geography by Letter - B | 0 | - | 4.53 | 69,370 |
| U.S. Geography by Letter - S | 0 | - | 4.55 | 52,834 |
| Two Letter U.S. State Abbreviations | 0 | - | 4.19 | 746,749 |
| Most Guessed U.S. Cities | 0 | - | 4.89 | 105,902 |
| U.S. Cities with the Biggest Economies | 0 | - | 4.83 | 72,744 |
| Countries Closest to the U. S. | 0 | - | 4.41 | 209,057 |
| Top 10 Non-English Languages of Los Angeles | 0 | - | 4.42 | 59,865 |
| 10 Closest Megacities to New York City | 0 | - | 4.52 | 67,324 |
| New England States | 0 | - | 4.51 | 59,799 |
| U.S. States by Land Area | 0 | - | 4.61 | 52,779 |
| Top 10 U.S. States by Inland Water Area | 0 | - | 4.53 | 37,999 |
| Add a Letter - Make a U.S. State | 0 | - | 4.72 | 82,762 |
| Top 10 Widest U.S. States East to West | 0 | - | 4.70 | 55,970 |
| Top 10 Tallest U.S. States North to South | 0 | - | 4.74 | 40,904 |
| U.S. States by Borders | 0 | - | 4.61 | 35,288 |
| U.S. States by Wikipedia Descriptions #1 | 0 | - | 4.57 | 39,332 |
| U.S. States by Wikipedia Descriptions #2 | 0 | - | 4.48 | 37,089 |
| 10 Easternmost U.S. States | 0 | - | 4.53 | 56,464 |
| The Only U.S. State ... #1 | 0 | - | 4.52 | 102,008 |
| 50 States, 50 Cities - Hard Version | 0 | - | 4.46 | 44,200 |
| Top 10 Richest U.S. States by Median Income | 0 | - | 4.47 | 119,069 |
| Canadian Prime Ministers | 0 | - | 4.63 | 57,489 |
| Asian Last Names in the United States | 0 | - | 4.43 | 46,741 |
| United States Map Quiz | 0 | - | 4.98 | 4,156,295 |
| Senators Who Ran For President | 0 | - | 4.24 | 17,036 |
| U.S. Electoral College Landslides | 0 | - | 4.35 | 22,035 |
| U.S. License Plates Picture Quiz | 0 | - | 4.59 | 52,893 |
| U.S. States with the Fewest Immigrants | 0 | - | 4.63 | 65,758 |
| U.S. States with the Highest Percentage of Farmland | 0 | - | 4.80 | 65,454 |
| U.S. States with the Lowest Percentage of Farmland | 0 | - | 4.74 | 55,171 |
| U.S. States with the Longest International Borders | 0 | - | 4.78 | 45,773 |
| Longest U.S. State Borders | 0 | - | 4.67 | 39,771 |
| Top 10 U.S. States with the Highest Elevation | 0 | - | 4.51 | 67,869 |
| 10 U.S. States with the Highest Tax Burden | 0 | - | 4.26 | 38,211 |
| Top 10 U.S. States by Manufacturing Employment | 0 | - | 4.49 | 28,806 |
| U.S. States with the Lowest Average Elevation | 0 | - | 4.55 | 38,485 |
| U.S. States With the Highest Average Elevation | 0 | - | 4.61 | 32,759 |
| U.S. States with the Fewest Borders | 0 | - | 4.77 | 113,476 |
| U.S. States with the Most Borders | 0 | - | 4.53 | 62,297 |
| U.S. States With No City Over 100,000 | 0 | - | 4.57 | 17,967 |
| Flags of North and South America | 0 | - | 4.99 | 372,606 |
| Belize Country Quiz | 0 | - | 4.85 | 20,958 |
| Largest United States Airlines | 0 | - | 4.39 | 55,012 |
| Third Most Common Language by U.S. State | 0 | - | 4.87 | 113,695 |
| U.S. Five-Star Generals and Admirals | 0 | - | 4.33 | 8,328 |
| Countries Closest to United States A-Z | 0 | - | 4.82 | 118,084 |
| U.S. Political Figures by Picture #1 | 0 | - | 4.14 | 26,145 |
| U.S. Political Figures by Picture #2 | 0 | - | 4.10 | 15,511 |
| Female Political Figures by Picture - U.S. | 0 | - | 4.20 | 10,856 |
| Florida Pro Sport Teams | 0 | - | 4.61 | 11,829 |
| Georgia ... or Georgia? | 0 | - | 4.67 | 76,731 |
| U.S. Geography by Letter - C | 0 | - | 4.27 | 74,047 |
| U.S. Geography by Letter - A | 0 | - | 4.37 | 63,049 |
| U.S. Geography by Letter - D | 0 | - | 4.09 | 57,038 |
| U.S. Geography by Letter - T | 0 | - | 4.29 | 49,737 |
| U.S. Geography by Letter - P | 0 | - | 4.38 | 53,662 |
| U.S. Geography by Letter - M | 0 | - | 4.14 | 53,299 |
| U.S. Geography by Letter - L | 0 | - | 4.04 | 41,096 |
| U.S. Geography by Letter - G | 0 | - | 4.13 | 39,269 |
| U.S. Geography By Letter - H | 0 | - | 4.35 | 40,086 |
| American Legal Vocabulary | 0 | - | 4.40 | 33,902 |
| U.S. Cities by Picture #1 | 0 | - | 4.36 | 34,534 |
| Cities by Picture #2 | 0 | - | 4.19 | 35,113 |
| American Founding Fathers | 0 | - | 4.42 | 23,217 |
| Famous People from California by Picture | 0 | - | 4.32 | 36,406 |
| California Groups of Things | 0 | - | 4.25 | 45,458 |
| Hawaiian Islands Map Quiz | 0 | - | 4.78 | 22,254 |
| New York Groups of Things | 0 | - | 4.35 | 63,474 |
| People on Money - United States | 0 | - | 4.31 | 63,334 |
| U.S. History Groups of Two | 0 | - | 4.23 | 44,433 |
| Last 10 U.S. States Alphabetically | 0 | - | 4.35 | 74,825 |
| Top 10 Least Populous U.S. State Capitals | 0 | - | 4.52 | 21,514 |
| Flyover States | 0 | - | 4.52 | 29,501 |
| U.S. States With Double Letters | 0 | - | 4.54 | 24,099 |
| U.S. States Bigger than Their Neighbors | 0 | - | 4.27 | 76,121 |
| States and Provinces that touch the Rocky Mountains | 0 | - | 4.42 | 32,488 |
| Name a Valid U.S. State #2 | 0 | - | 4.63 | 76,963 |
| Name a Valid U.S. State #3 | 0 | - | 4.78 | 48,994 |
| 50 States, 50 Cities - Easy Version | 0 | - | 4.39 | 128,324 |
| Top 10 Least-Forested U.S. States | 0 | - | 4.50 | 46,499 |
| Famous Canadians by Picture | 0 | - | 4.39 | 49,340 |
| The Thirteen Dwarves in the Hobbit | 0 | - | 4.81 | 28,642 |
| The Only American Country ... | 0 | - | 4.92 | 121,519 |
| American Countries with the Shortest Names | 0 | - | 4.96 | 121,042 |
| U.S. State Border Crossings | 0 | - | 4.97 | 96,428 |
| U.S. Citizenship Test Questions | 0 | - | 4.83 | 239,337 |
| U.S. Cities with the Most International Tourists | 0 | - | 4.88 | 75,413 |
| Names of Generations | 0 | - | 4.09 | 44,704 |
| Cities and Towns of Massachusetts | 0 | - | 4.92 | 73,888 |
| Who Did that Motown Song? | 0 | - | 4.48 | 13,050 |
| Countries Larger Than Texas but With Fewer People | 0 | - | 4.92 | 39,877 |
| Regions of U.S. States | 0 | - | 4.37 | 43,837 |
| States, Provinces & Territories that Touch the Appalachian Mountains | 0 | - | 4.59 | 20,380 |
| 10 U.S. States with the Most Valuable Crops | 0 | - | 4.41 | 29,565 |
| U.S. States with the Lowest HDI | 0 | - | 4.47 | 28,841 |
| Which U.S. State - Multiple Choice | 0 | - | 4.48 | 20,282 |
| Movies by State | 0 | - | 4.27 | 40,533 |
| U.S. States with the Fewest Traffic Fatalities | 0 | - | 4.20 | 21,139 |
| U.S. States with the Most Traffic Fatalities | 0 | - | 4.10 | 19,125 |
| Canada Country Quiz | 0 | - | 4.54 | 132,420 |
| Canada Cities Map Quiz | 0 | - | 4.63 | 124,137 |
| Canada A-Z | 0 | - | 4.73 | 32,799 |
| Catholic Countries in Europe | 0 | - | 4.83 | 95,024 |
| Monarchies of Europe | 0 | - | 4.90 | 98,055 |
| Monarchies of Asia | 0 | - | 4.97 | 71,040 |
| Asian Country Superlatives | 0 | - | 4.84 | 80,829 |
| Top 10 Biggest Economies in Africa | 0 | - | 4.99 | 120,512 |
| Category Elimination - African Geography #1 | 0 | - | 4.90 | 92,253 |
| Mexico Country Quiz | 0 | - | 4.49 | 72,387 |
| All First-Level Subdivisions of South America on a Map | 0 | - | 4.92 | 53,798 |
| Brazil States Map Quiz | 0 | - | 4.85 | 47,995 |
| States of Brazil | 0 | - | 4.97 | 87,836 |
| Fictional Characters from the Midwest by Picture | 0 | - | 4.04 | 19,193 |
| U.S. States by Picture #1 | 0 | - | 4.21 | 15,429 |
| U.S. Cities with the Highest Murder Rate | 0 | - | 4.55 | 138,286 |
| Most-Visited U.S. Cities | 0 | - | 4.85 | 93,675 |
| Every U.S. Metro Area on a Map | 0 | - | 4.97 | 81,696 |
| Richest Metro Areas in the U.S. | 0 | - | 4.42 | 43,686 |
| Politicians with Other Careers | 0 | - | 3.98 | 15,014 |
| Main Parts of the U.S. Budget | 0 | - | 3.45 | 8,709 |
| Geography of California | 0 | - | 4.26 | 10,556 |
| California Pro Sport Teams | 0 | - | 4.19 | 22,680 |
| Chicago City Trivia | 0 | - | 4.31 | 31,439 |
| New York Pro Sport Teams | 0 | - | 4.32 | 25,895 |
| Texas Pro Sport Teams | 0 | - | 4.19 | 16,818 |
| History of Pennsylvania | 0 | - | 4.16 | 7,133 |
| History of Virginia | 0 | - | 4.31 | 11,596 |
| Washington State by Picture | 0 | - | 4.26 | 7,727 |
| Events in U.S. History | 0 | - | 4.40 | 28,651 |
| Events by U.S. State #1 | 0 | - | 4.43 | 22,906 |
| Most Valuable Crops by U.S. State | 0 | - | 4.40 | 39,083 |
| U.S. States with the Most Venomous Snake Species | 0 | - | 4.47 | 26,420 |
