| U.S. Cabinet Departments | 0 | - | 4.86 | 72,958 |
| U.S. Federal Agency Acronyms | 0 | - | 4.50 | 80,049 |
| Deadliest U.S. Wars | 0 | - | 4.89 | 191,306 |
| U.S. States by Governor | 0 | - | 4.43 | 18,083 |
| U.S. Political Parties in History | 0 | - | 4.44 | 27,719 |
| U.S. Government Agencies | 0 | - | 4.44 | 19,717 |
| US States Quiz | 0 | - | 5.00 | 16,927,708 |
| States of the U.S. in Alphabetical Order | 0 | - | 4.98 | 367,901 |
| Top 10 Coldest U.S. States | 0 | - | 4.94 | 125,369 |
| Top 10 Hottest U.S. States | 0 | - | 4.86 | 126,016 |
| Top 10 U.S. States with the Least Precipitation | 0 | - | 4.82 | 62,038 |
| Name the U.S. National Parks | 0 | - | 4.86 | 60,157 |
| Total United States Immigration by Country | 0 | - | 4.91 | 111,941 |
| Most Common U.S. Last Names - Extreme | 0 | - | 4.94 | 174,954 |
| "Do Not Travel" Countries for U.S. Citizens | 0 | - | 4.97 | 245,032 |
| Top 10 Non-English Languages Spoken in New York City | 0 | - | 4.85 | 66,440 |
| All 3,143 Counties of the United States on a Map | 0 | - | 4.97 | 333,453 |
| The U.S. Government - How Does it Work? | 0 | - | 4.34 | 42,404 |
| Pixelated United States Map | 0 | - | 4.88 | 94,505 |
| Most-Visited Countries by Americans | 0 | - | 4.86 | 110,013 |
| Countries that Visit the United States the Most | 0 | - | 4.96 | 92,045 |
| The 13 Colonies Quiz | 0 | - | 4.97 | 118,174 |
| U.S. States with the Letter Y | 0 | - | 4.85 | 111,773 |
| 10 Southernmost U.S. States | 0 | - | 4.89 | 113,712 |
| U.S. States with Short Names | 0 | - | 4.91 | 149,401 |
| U.S. States that Start with M | 0 | - | 4.93 | 187,719 |
| U.S. States By Population | 0 | - | 4.92 | 153,788 |
| U.S. States that Start with N | 0 | - | 4.95 | 171,779 |
| U.S. States with Longest Names | 0 | - | 4.84 | 44,620 |
| U.S. States with a Unique First Letter | 0 | - | 4.96 | 88,558 |
| 10 Westernmost U.S. States | 0 | - | 4.95 | 64,350 |
| The Only Remaining U.S. State . . . | 0 | - | 4.93 | 65,822 |
| Midwestern States of the U.S. | 0 | - | 4.88 | 13,938 |
| 10 Longest Rivers in the United States | 0 | - | 4.85 | 39,256 |
| Countries Closest to United States by Continent | 0 | - | 4.99 | 146,753 |
| Countries that Beat the United States | 0 | - | 4.93 | 167,907 |
| Louisiana Purchase with a Map | 0 | - | 4.96 | 48,894 |
| US States with an Empty Map | 0 | - | 5.00 | 626,290 |
| Top 10 Most-Visited U.S. States | 0 | - | 4.90 | 101,986 |
| U.S. States with the Most Immigrants | 0 | - | 4.85 | 82,631 |
| U.S. States or European Countries by Area | 0 | - | 4.95 | 96,457 |
| U.S. States or European Countries by Population | 0 | - | 4.97 | 133,587 |
| Senators Who Ran For President | 0 | - | 4.24 | 17,062 |
| U.S. Electoral College Landslides | 0 | - | 4.35 | 22,058 |
| U.S. Political Figures by Picture #1 | 0 | - | 4.14 | 26,182 |
| U.S. Political Figures by Picture #2 | 0 | - | 4.10 | 15,541 |
| Female Political Figures by Picture - U.S. | 0 | - | 4.22 | 10,876 |
| Name a Valid U.S. State #1 | 0 | - | 4.93 | 209,570 |
| Top 10 Most Native American U.S. States | 0 | - | 4.87 | 92,393 |
| Canadian Prime Ministers | 0 | - | 4.63 | 57,671 |
| U.S. Citizenship Test Questions | 0 | - | 4.83 | 239,803 |
| Top 10 Biggest Economies in the Americas | 0 | - | 4.94 | 92,437 |
| States of Mexico | 0 | - | 4.96 | 176,939 |
| Mexico States Map Quiz | 0 | - | 4.84 | 105,235 |
| Top U.S. Universities | 0 | - | 4.15 | 145,424 |
| Top 10 Richest Countries in the Americas | 0 | - | 4.93 | 84,561 |
| Mexico Cities Map Quiz | 0 | - | 4.83 | 38,708 |
| U.S. State Nicknames | 0 | - | 4.47 | 50,611 |
| Countries with American Expatriates | 0 | - | 4.53 | 42,621 |
| United States Landmarks Map Quiz | 0 | - | 4.55 | 40,219 |
| United States Country Quiz | 0 | - | 4.43 | 101,778 |
| Busiest Air Routes from the U.S. | 0 | - | 4.46 | 76,976 |
| 10 U.S. States With The Lowest Murder Rates | 0 | - | 4.48 | 52,276 |
| Biggest Trading Partners - United States | 0 | - | 4.63 | 106,746 |
| Politicians with Other Careers | 0 | - | 3.98 | 15,031 |
| Main Parts of the U.S. Budget | 0 | - | 3.45 | 8,727 |
| U.S. Presidents Quiz | 0 | - | 5.00 | 3,710,694 |
| 100 Most Influential Figures in U.S. History | 0 | - | 4.20 | 45,141 |
| 10 U.S. States With The Highest Murder Rates | 0 | - | 4.47 | 54,577 |
| U.S. State Superlatives #1 | 0 | - | 4.47 | 87,592 |
| U.S. State Superlatives #2 | 0 | - | 4.53 | 40,684 |
| Top 10 U.S. States With the Most Tornadoes | 0 | - | 4.53 | 64,870 |
| Top 10 Least Religious U.S. States | 0 | - | 4.51 | 34,365 |
| Top 10 U.S. States by Public Transit | 0 | - | 4.77 | 63,875 |
| Top 10 U.S. States with the Most Precipitation | 0 | - | 4.46 | 41,749 |
| Most-Visited Countries by Canadians | 0 | - | 4.83 | 39,466 |
| Countries Closest to Canada | 0 | - | 4.91 | 198,649 |
| Asian Countries Americans Travel to the Most | 0 | - | 4.75 | 60,080 |
| U.S. Geography by Letter - B | 0 | - | 4.53 | 69,722 |
| U.S. Geography by Letter - S | 0 | - | 4.55 | 53,190 |
| Two Letter U.S. State Abbreviations | 0 | - | 4.19 | 748,243 |
| Most Guessed U.S. Cities | 0 | - | 4.89 | 106,377 |
| U.S. Cities with the Biggest Economies | 0 | - | 4.83 | 73,023 |
| Countries Closest to the U. S. | 0 | - | 4.41 | 209,924 |
| American Geography Quiz for Dummies | 0 | - | 4.41 | 69,270 |
| Children of U.S. Presidents | 0 | - | 3.95 | 16,682 |
| Top 10 Non-English Languages of Los Angeles | 0 | - | 4.43 | 59,975 |
| 10 Closest Megacities to New York City | 0 | - | 4.52 | 67,407 |
| New England States | 0 | - | 4.51 | 59,841 |
| U.S. States by Land Area | 0 | - | 4.63 | 52,918 |
| Top 10 U.S. States by Inland Water Area | 0 | - | 4.53 | 38,047 |
| Add a Letter - Make a U.S. State | 0 | - | 4.70 | 82,937 |
| Top 10 Widest U.S. States East to West | 0 | - | 4.70 | 56,135 |
| Top 10 Tallest U.S. States North to South | 0 | - | 4.74 | 41,018 |
| U.S. States by Borders | 0 | - | 4.61 | 35,388 |
| U.S. States by Wikipedia Descriptions #1 | 0 | - | 4.57 | 39,394 |
| U.S. States by Wikipedia Descriptions #2 | 0 | - | 4.48 | 37,138 |
| 10 Easternmost U.S. States | 0 | - | 4.53 | 56,556 |
| The Only U.S. State ... #1 | 0 | - | 4.52 | 102,162 |
| 50 States, 50 Cities - Hard Version | 0 | - | 4.46 | 44,281 |
| Top 10 Richest U.S. States by Median Income | 0 | - | 4.47 | 119,188 |
| Countries that Beat Canada | 0 | - | 4.91 | 98,581 |
| Asian Last Names in the United States | 0 | - | 4.43 | 46,853 |
| United States Map Quiz | 0 | - | 4.98 | 4,164,392 |
| 10 U.S. States with the Highest Tax Burden | 0 | - | 4.26 | 38,290 |
| Top 10 U.S. States by Manufacturing Employment | 0 | - | 4.49 | 28,843 |
| U.S. States With No City Over 100,000 | 0 | - | 4.57 | 18,051 |
| Flags of North and South America | 0 | - | 4.99 | 374,643 |
| Belize Country Quiz | 0 | - | 4.85 | 21,024 |
| Largest United States Airlines | 0 | - | 4.39 | 55,084 |
| U.S. Five-Star Generals and Admirals | 0 | - | 4.33 | 8,342 |
| Countries Closest to United States A-Z | 0 | - | 4.82 | 118,390 |
| All U.S. Supreme Court Justices | 0 | - | 4.54 | 29,112 |
| U.S. Bill of Rights | 0 | - | 4.53 | 32,560 |
| All U.S. Supreme Court Justices Ever | 0 | - | 4.50 | 11,833 |
| U.S. Presidents by Picture | 0 | - | 4.87 | 427,228 |
| Florida Pro Sport Teams | 0 | - | 4.61 | 11,867 |
| Boston Talk to English Translation Quiz | 0 | - | 4.59 | 56,047 |
| Events in U.S. History | 0 | - | 4.41 | 28,726 |
| U.S. History for Dummies | 0 | - | 4.47 | 83,220 |
| U.S. License Plates Picture Quiz | 0 | - | 4.61 | 53,006 |
| U.S. States with the Fewest Immigrants | 0 | - | 4.63 | 65,916 |
| U.S. States with the Highest Percentage of Farmland | 0 | - | 4.80 | 65,547 |
| U.S. States with the Lowest Percentage of Farmland | 0 | - | 4.74 | 55,254 |
| States and Provinces that touch the Rocky Mountains | 0 | - | 4.43 | 32,521 |
| Name a Valid U.S. State #2 | 0 | - | 4.63 | 77,182 |
| Walking Across U.S. State Borders with Hints | 0 | - | 4.74 | 35,086 |
| Name a Valid U.S. State #3 | 0 | - | 4.78 | 49,129 |
| U.S. States with the Longest International Borders | 0 | - | 4.78 | 45,858 |
| Longest U.S. State Borders | 0 | - | 4.67 | 39,962 |
| Top 10 U.S. States with the Highest Elevation | 0 | - | 4.51 | 67,916 |
| U.S. States with the Lowest Average Elevation | 0 | - | 4.55 | 38,533 |
| U.S. States With the Highest Average Elevation | 0 | - | 4.61 | 32,801 |
| U.S. States with the Fewest Borders | 0 | - | 4.78 | 114,009 |
| U.S. States with the Most Borders | 0 | - | 4.53 | 62,331 |
| Georgia ... or Georgia? | 0 | - | 4.67 | 76,890 |
| U.S. Geography by Letter - C | 0 | - | 4.27 | 74,334 |
| U.S. Geography by Letter - A | 0 | - | 4.37 | 63,354 |
| U.S. Geography by Letter - D | 0 | - | 4.09 | 57,317 |
| U.S. Geography by Letter - T | 0 | - | 4.29 | 50,053 |
| U.S. Geography by Letter - P | 0 | - | 4.38 | 54,189 |
| U.S. Geography by Letter - M | 0 | - | 4.14 | 53,517 |
| U.S. Geography by Letter - L | 0 | - | 4.04 | 41,366 |
| U.S. Geography by Letter - G | 0 | - | 4.13 | 39,529 |
| U.S. Geography by Letter - R | 0 | - | 4.22 | 36,134 |
| U.S. Geography By Letter - H | 0 | - | 4.35 | 40,407 |
| Third Most Common Language by U.S. State | 0 | - | 4.87 | 113,823 |
| American Legal Vocabulary | 0 | - | 4.40 | 33,966 |
| U.S. Cities by Picture #1 | 0 | - | 4.36 | 34,632 |
| Cities by Picture #2 | 0 | - | 4.19 | 35,197 |
| American Political Words | 0 | - | 4.39 | 23,439 |
| First Names of U.S. Presidents | 0 | - | 4.86 | 382,448 |
| American Founding Fathers | 0 | - | 4.42 | 23,247 |
| Famous People from California by Picture | 0 | - | 4.32 | 36,548 |
| California Groups of Things | 0 | - | 4.25 | 45,543 |
| Hawaiian Islands Map Quiz | 0 | - | 4.78 | 22,295 |
| New York Groups of Things | 0 | - | 4.35 | 64,525 |
| People on Money - United States | 0 | - | 4.31 | 63,383 |
| U.S. History Groups of Two | 0 | - | 4.23 | 44,514 |
| Last 10 U.S. States Alphabetically | 0 | - | 4.35 | 74,933 |
| Top 10 Least Populous U.S. State Capitals | 0 | - | 4.52 | 21,541 |
| Flyover States | 0 | - | 4.52 | 29,541 |
| U.S. States With Double Letters | 0 | - | 4.55 | 24,184 |
| U.S. States Bigger than Their Neighbors | 0 | - | 4.28 | 76,277 |
| 50 States, 50 Cities - Easy Version | 0 | - | 4.39 | 128,525 |
| Top 10 Least-Forested U.S. States | 0 | - | 4.50 | 46,578 |
| Famous Canadians by Picture | 0 | - | 4.39 | 49,423 |
| European Secessionist Movements on a Map | 0 | - | 4.53 | 35,071 |
| The Only American Country ... | 0 | - | 4.92 | 121,858 |
| American Countries with the Shortest Names | 0 | - | 4.96 | 121,324 |
| U.S. State Border Crossings | 0 | - | 4.97 | 96,642 |
| U.S. Cities with the Most International Tourists | 0 | - | 4.88 | 75,651 |
| Names of Generations | 0 | - | 4.09 | 45,246 |
| Name a Valid U.S. President #1 | 0 | - | 4.89 | 192,716 |
| Cities and Towns of Massachusetts | 0 | - | 4.92 | 74,470 |
| Who Did that Motown Song? | 0 | - | 4.48 | 13,063 |
| Countries Larger Than Texas but With Fewer People | 0 | - | 4.92 | 40,063 |
| Regions of U.S. States | 0 | - | 4.37 | 44,006 |
| States, Provinces & Territories that Touch the Appalachian Mountains | 0 | - | 4.59 | 20,402 |
| 10 U.S. States with the Most Valuable Crops | 0 | - | 4.41 | 29,607 |
| U.S. States with the Lowest HDI | 0 | - | 4.47 | 28,882 |
| Which U.S. State - Multiple Choice | 0 | - | 4.48 | 20,328 |
| Movies by State | 0 | - | 4.27 | 40,574 |
| U.S. States with the Fewest Traffic Fatalities | 0 | - | 4.20 | 21,170 |
| U.S. States with the Most Traffic Fatalities | 0 | - | 4.10 | 19,173 |
| Canada Country Quiz | 0 | - | 4.54 | 132,719 |
| Canada Cities Map Quiz | 0 | - | 4.64 | 124,396 |
| Canada A-Z | 0 | - | 4.73 | 32,901 |
| Catholic Countries in Europe | 0 | - | 4.83 | 95,440 |
| Monarchies of Europe | 0 | - | 4.90 | 98,409 |
| Monarchies of Asia | 0 | - | 4.97 | 71,270 |
| Asian Country Superlatives | 0 | - | 4.84 | 81,058 |
| Top 10 American Countries by Coastline | 0 | - | 4.96 | 88,483 |
| U.S. Geography by Letter - N | 0 | - | 3.80 | 52,966 |
| U.S. Geography by Letter - E | 0 | - | 3.75 | 48,960 |
| U.S. Geography by Letter - F | 0 | - | 3.84 | 45,223 |
| U.S. Geography by Letter - O | 0 | - | 3.52 | 41,700 |
| Mexico Country Quiz | 0 | - | 4.49 | 72,548 |
| All First-Level Subdivisions of South America on a Map | 0 | - | 4.92 | 54,244 |
| Brazil States Map Quiz | 0 | - | 4.86 | 48,287 |
