| U.S. Cabinet Departments | 0 | - | 4.86 | 73,177 |
| U.S. Federal Agency Acronyms | 0 | - | 4.50 | 80,202 |
| Deadliest U.S. Wars | 0 | - | 4.89 | 192,034 |
| U.S. States by Governor | 0 | - | 4.43 | 18,125 |
| U.S. Political Parties in History | 0 | - | 4.44 | 27,787 |
| U.S. Government Agencies | 0 | - | 4.44 | 19,809 |
| US States Quiz | 0 | - | 5.00 | 17,026,066 |
| States of the U.S. in Alphabetical Order | 0 | - | 4.98 | 368,917 |
| Top 10 Coldest U.S. States | 0 | - | 4.94 | 126,062 |
| Top 10 Hottest U.S. States | 0 | - | 4.86 | 126,719 |
| Top 10 U.S. States with the Least Precipitation | 0 | - | 4.83 | 62,288 |
| Name the U.S. National Parks | 0 | - | 4.86 | 60,608 |
| Total United States Immigration by Country | 0 | - | 4.91 | 112,581 |
| Most Common U.S. Last Names - Extreme | 0 | - | 4.94 | 175,791 |
| "Do Not Travel" Countries for U.S. Citizens | 0 | - | 4.97 | 247,098 |
| Top 10 Non-English Languages Spoken in New York City | 0 | - | 4.85 | 66,840 |
| All 3,143 Counties of the United States on a Map | 0 | - | 4.97 | 336,358 |
| The U.S. Government - How Does it Work? | 0 | - | 4.34 | 42,504 |
| Pixelated United States Map | 0 | - | 4.89 | 94,953 |
| Most-Visited Countries by Americans | 0 | - | 4.86 | 110,771 |
| Countries that Visit the United States the Most | 0 | - | 4.96 | 92,620 |
| The 13 Colonies Quiz | 0 | - | 4.97 | 119,208 |
| U.S. States with the Letter Y | 0 | - | 4.86 | 112,460 |
| 10 Southernmost U.S. States | 0 | - | 4.89 | 114,473 |
| U.S. States with Short Names | 0 | - | 4.91 | 150,545 |
| U.S. States that Start with M | 0 | - | 4.94 | 188,596 |
| U.S. States By Population | 0 | - | 4.92 | 154,273 |
| U.S. States that Start with N | 0 | - | 4.95 | 172,394 |
| U.S. States with Longest Names | 0 | - | 4.85 | 44,994 |
| U.S. States with a Unique First Letter | 0 | - | 4.96 | 88,995 |
| 10 Westernmost U.S. States | 0 | - | 4.95 | 64,608 |
| The Only Remaining U.S. State . . . | 0 | - | 4.93 | 66,223 |
| Midwestern States of the U.S. | 0 | - | 4.88 | 14,226 |
| 10 Longest Rivers in the United States | 0 | - | 4.86 | 39,465 |
| Countries Closest to United States by Continent | 0 | - | 4.99 | 147,424 |
| Countries that Beat the United States | 0 | - | 4.93 | 168,934 |
| Louisiana Purchase with a Map | 0 | - | 4.96 | 49,472 |
| US States with an Empty Map | 0 | - | 5.00 | 629,689 |
| Top 10 Most-Visited U.S. States | 0 | - | 4.90 | 102,593 |
| U.S. States with the Most Immigrants | 0 | - | 4.85 | 83,120 |
| U.S. States or European Countries by Area | 0 | - | 4.95 | 97,422 |
| U.S. States or European Countries by Population | 0 | - | 4.97 | 134,632 |
| Senators Who Ran For President | 0 | - | 4.24 | 17,092 |
| U.S. Electoral College Landslides | 0 | - | 4.35 | 22,102 |
| U.S. Political Figures by Picture #1 | 0 | - | 4.14 | 26,226 |
| U.S. Political Figures by Picture #2 | 0 | - | 4.10 | 15,578 |
| Female Political Figures by Picture - U.S. | 0 | - | 4.22 | 10,913 |
| Name a Valid U.S. State #1 | 0 | - | 4.93 | 210,913 |
| Top 10 Most Native American U.S. States | 0 | - | 4.87 | 93,006 |
| Canadian Prime Ministers | 0 | - | 4.64 | 58,021 |
| U.S. Citizenship Test Questions | 0 | - | 4.83 | 240,998 |
| Top 10 Biggest Economies in the Americas | 0 | - | 4.94 | 92,965 |
| States of Mexico | 0 | - | 4.96 | 178,817 |
| Mexico States Map Quiz | 0 | - | 4.85 | 105,798 |
| Top U.S. Universities | 0 | - | 4.15 | 146,018 |
| Top 10 Richest Countries in the Americas | 0 | - | 4.92 | 95,724 |
| Mexico Cities Map Quiz | 0 | - | 4.83 | 38,875 |
| U.S. State Nicknames | 0 | - | 4.47 | 50,813 |
| Countries with American Expatriates | 0 | - | 4.53 | 42,701 |
| United States Landmarks Map Quiz | 0 | - | 4.55 | 40,297 |
| United States Country Quiz | 0 | - | 4.43 | 102,368 |
| Busiest Air Routes from the U.S. | 0 | - | 4.46 | 77,106 |
| 10 U.S. States With The Lowest Murder Rates | 0 | - | 4.48 | 53,127 |
| Biggest Trading Partners - United States | 0 | - | 4.63 | 106,920 |
| Politicians with Other Careers | 0 | - | 3.98 | 15,067 |
| Main Parts of the U.S. Budget | 0 | - | 3.45 | 8,752 |
| U.S. Presidents Quiz | 0 | - | 5.00 | 3,731,793 |
| 100 Most Influential Figures in U.S. History | 0 | - | 4.11 | 52,525 |
| 10 U.S. States With The Highest Murder Rates | 0 | - | 4.47 | 54,930 |
| U.S. State Superlatives #1 | 0 | - | 4.47 | 87,718 |
| U.S. State Superlatives #2 | 0 | - | 4.53 | 40,786 |
| Top 10 U.S. States With the Most Tornadoes | 0 | - | 4.54 | 65,065 |
| Top 10 Least Religious U.S. States | 0 | - | 4.51 | 34,489 |
| Top 10 U.S. States by Public Transit | 0 | - | 4.74 | 64,108 |
| Top 10 U.S. States with the Most Precipitation | 0 | - | 4.46 | 41,848 |
| Most-Visited Countries by Canadians | 0 | - | 4.83 | 39,669 |
| Countries Closest to Canada | 0 | - | 4.91 | 199,679 |
| Asian Countries Americans Travel to the Most | 0 | - | 4.75 | 60,264 |
| U.S. Geography by Letter - B | 0 | - | 4.54 | 70,162 |
| U.S. Geography by Letter - S | 0 | - | 4.55 | 58,605 |
| Two Letter U.S. State Abbreviations | 0 | - | 4.19 | 750,414 |
| Most Guessed U.S. Cities | 0 | - | 4.89 | 107,228 |
| U.S. Cities with the Biggest Economies | 0 | - | 4.83 | 73,644 |
| Countries Closest to the U. S. | 0 | - | 4.41 | 210,774 |
| American Geography Quiz for Dummies | 0 | - | 4.41 | 69,496 |
| Children of U.S. Presidents | 0 | - | 3.97 | 16,700 |
| Top 10 Non-English Languages of Los Angeles | 0 | - | 4.43 | 60,168 |
| 10 Closest Megacities to New York City | 0 | - | 4.52 | 67,565 |
| New England States | 0 | - | 4.51 | 59,915 |
| U.S. States by Land Area | 0 | - | 4.55 | 53,117 |
| Top 10 U.S. States by Inland Water Area | 0 | - | 4.53 | 38,139 |
| Add a Letter - Make a U.S. State | 0 | - | 4.70 | 83,235 |
| Top 10 Widest U.S. States East to West | 0 | - | 4.70 | 56,343 |
| Top 10 Tallest U.S. States North to South | 0 | - | 4.75 | 41,191 |
| U.S. States by Borders | 0 | - | 4.61 | 35,517 |
| U.S. States by Wikipedia Descriptions #1 | 0 | - | 4.57 | 39,483 |
| U.S. States by Wikipedia Descriptions #2 | 0 | - | 4.48 | 37,210 |
| 10 Easternmost U.S. States | 0 | - | 4.53 | 56,722 |
| The Only U.S. State ... #1 | 0 | - | 4.52 | 102,407 |
| 50 States, 50 Cities - Hard Version | 0 | - | 4.46 | 44,486 |
| Top 10 Richest U.S. States by Median Income | 0 | - | 4.46 | 119,390 |
| Countries that Beat Canada | 0 | - | 4.90 | 99,139 |
| Asian Last Names in the United States | 0 | - | 4.43 | 47,018 |
| United States Map Quiz | 0 | - | 4.98 | 4,173,835 |
| 10 U.S. States with the Highest Tax Burden | 0 | - | 4.26 | 38,417 |
| Top 10 U.S. States by Manufacturing Employment | 0 | - | 4.49 | 28,895 |
| U.S. States With No City Over 100,000 | 0 | - | 4.57 | 18,165 |
| Flags of North and South America | 0 | - | 4.99 | 378,271 |
| Belize Country Quiz | 0 | - | 4.85 | 21,122 |
| Largest United States Airlines | 0 | - | 4.39 | 55,187 |
| U.S. Five-Star Generals and Admirals | 0 | - | 4.33 | 8,363 |
| Countries Closest to United States A-Z | 0 | - | 4.82 | 118,844 |
| All U.S. Supreme Court Justices | 0 | - | 4.54 | 29,167 |
| U.S. Bill of Rights | 0 | - | 4.53 | 32,874 |
| All U.S. Supreme Court Justices Ever | 0 | - | 4.50 | 11,879 |
| U.S. Presidents by Picture | 0 | - | 4.87 | 428,927 |
| Florida Pro Sport Teams | 0 | - | 4.61 | 11,918 |
| Boston Talk to English Translation Quiz | 0 | - | 4.59 | 56,301 |
| Events in U.S. History | 0 | - | 4.41 | 28,864 |
| U.S. History for Dummies | 0 | - | 4.47 | 83,509 |
| U.S. License Plates Picture Quiz | 0 | - | 4.61 | 53,197 |
| U.S. States with the Fewest Immigrants | 0 | - | 4.64 | 66,180 |
| U.S. States with the Highest Percentage of Farmland | 0 | - | 4.80 | 65,689 |
| U.S. States with the Lowest Percentage of Farmland | 0 | - | 4.70 | 61,546 |
| States and Provinces that touch the Rocky Mountains | 0 | - | 4.43 | 32,576 |
| Name a Valid U.S. State #2 | 0 | - | 4.63 | 77,494 |
| Walking Across U.S. State Borders with Hints | 0 | - | 4.75 | 35,138 |
| Name a Valid U.S. State #3 | 0 | - | 4.78 | 49,352 |
| U.S. States with the Longest International Borders | 0 | - | 4.78 | 45,988 |
| Longest U.S. State Borders | 0 | - | 4.69 | 40,201 |
| Top 10 U.S. States with the Highest Elevation | 0 | - | 4.51 | 67,997 |
| U.S. States with the Lowest Average Elevation | 0 | - | 4.55 | 38,586 |
| U.S. States With the Highest Average Elevation | 0 | - | 4.61 | 32,853 |
| U.S. States with the Fewest Borders | 0 | - | 4.78 | 114,576 |
| U.S. States with the Most Borders | 0 | - | 4.53 | 62,388 |
| Georgia ... or Georgia? | 0 | - | 4.68 | 77,108 |
| U.S. Geography by Letter - C | 0 | - | 4.27 | 74,699 |
| U.S. Geography by Letter - A | 0 | - | 4.37 | 63,755 |
| U.S. Geography by Letter - D | 0 | - | 4.09 | 57,713 |
| U.S. Geography by Letter - T | 0 | - | 4.29 | 50,471 |
| U.S. Geography by Letter - P | 0 | - | 4.40 | 54,627 |
| U.S. Geography by Letter - M | 0 | - | 4.14 | 53,789 |
| U.S. Geography by Letter - L | 0 | - | 4.04 | 41,738 |
| U.S. Geography by Letter - G | 0 | - | 4.13 | 39,882 |
| U.S. Geography by Letter - R | 0 | - | 4.22 | 37,085 |
| U.S. Geography By Letter - H | 0 | - | 4.35 | 40,823 |
| Third Most Common Language by U.S. State | 0 | - | 4.87 | 114,040 |
| American Legal Vocabulary | 0 | - | 4.40 | 34,049 |
| U.S. Cities by Picture #1 | 0 | - | 4.36 | 34,768 |
| Cities by Picture #2 | 0 | - | 4.19 | 35,336 |
| American Political Words | 0 | - | 4.39 | 23,487 |
| First Names of U.S. Presidents | 0 | - | 4.86 | 383,934 |
| American Founding Fathers | 0 | - | 4.42 | 23,298 |
| Famous People from California by Picture | 0 | - | 4.32 | 36,752 |
| California Groups of Things | 0 | - | 4.26 | 45,811 |
| Hawaiian Islands Map Quiz | 0 | - | 4.78 | 22,330 |
| New York Groups of Things | 0 | - | 4.39 | 72,393 |
| People on Money - United States | 0 | - | 4.31 | 63,490 |
| U.S. History Groups of Two | 0 | - | 4.23 | 44,634 |
| Last 10 U.S. States Alphabetically | 0 | - | 4.35 | 75,122 |
| Top 10 Least Populous U.S. State Capitals | 0 | - | 4.52 | 21,581 |
| Flyover States | 0 | - | 4.53 | 29,619 |
| U.S. States With Double Letters | 0 | - | 4.55 | 24,309 |
| U.S. States Bigger than Their Neighbors | 0 | - | 4.28 | 76,462 |
| 50 States, 50 Cities - Easy Version | 0 | - | 4.39 | 129,055 |
| Top 10 Least-Forested U.S. States | 0 | - | 4.50 | 46,712 |
| Famous Canadians by Picture | 0 | - | 4.39 | 49,543 |
| European Secessionist Movements on a Map | 0 | - | 4.53 | 35,256 |
| The Only American Country ... | 0 | - | 4.92 | 122,363 |
| American Countries with the Shortest Names | 0 | - | 4.97 | 121,791 |
| U.S. State Border Crossings | 0 | - | 4.97 | 96,972 |
| U.S. Cities with the Most International Tourists | 0 | - | 4.88 | 76,082 |
| Names of Generations | 0 | - | 4.09 | 45,605 |
| Name a Valid U.S. President #1 | 0 | - | 4.89 | 194,053 |
| Cities and Towns of Massachusetts | 0 | - | 4.93 | 75,258 |
| Who Did that Motown Song? | 0 | - | 4.48 | 13,085 |
| Countries Larger Than Texas but With Fewer People | 0 | - | 4.92 | 40,343 |
| Regions of U.S. States | 0 | - | 4.37 | 44,269 |
| States, Provinces & Territories that Touch the Appalachian Mountains | 0 | - | 4.59 | 20,432 |
| 10 U.S. States with the Most Valuable Crops | 0 | - | 4.41 | 29,642 |
| U.S. States with the Lowest HDI | 0 | - | 4.47 | 28,947 |
| Which U.S. State - Multiple Choice | 0 | - | 4.48 | 20,388 |
| Movies by State | 0 | - | 4.27 | 40,620 |
| U.S. States with the Fewest Traffic Fatalities | 0 | - | 4.20 | 21,214 |
| U.S. States with the Most Traffic Fatalities | 0 | - | 4.10 | 19,222 |
| Canada Country Quiz | 0 | - | 4.55 | 133,194 |
| Canada Cities Map Quiz | 0 | - | 4.64 | 124,705 |
| Canada A-Z | 0 | - | 4.73 | 32,998 |
| Catholic Countries in Europe | 0 | - | 4.83 | 95,920 |
| Monarchies of Europe | 0 | - | 4.90 | 99,054 |
| Monarchies of Asia | 0 | - | 4.97 | 71,622 |
| Asian Country Superlatives | 0 | - | 4.84 | 81,368 |
| Top 10 American Countries by Coastline | 0 | - | 4.96 | 88,673 |
| U.S. Geography by Letter - N | 0 | - | 3.80 | 53,202 |
| U.S. Geography by Letter - E | 0 | - | 3.75 | 49,244 |
| U.S. Geography by Letter - F | 0 | - | 3.85 | 45,526 |
| U.S. Geography by Letter - O | 0 | - | 3.52 | 41,988 |
| Mexico Country Quiz | 0 | - | 4.49 | 72,833 |
| All First-Level Subdivisions of South America on a Map | 0 | - | 4.93 | 55,068 |
| Brazil States Map Quiz | 0 | - | 4.87 | 48,744 |
