| U.S. Cabinet Departments | 0 | - | 4.86 | 73,023 |
| U.S. Federal Agency Acronyms | 0 | - | 4.50 | 80,087 |
| Deadliest U.S. Wars | 0 | - | 4.89 | 191,540 |
| U.S. States by Governor | 0 | - | 4.43 | 18,103 |
| U.S. Political Parties in History | 0 | - | 4.44 | 27,736 |
| U.S. Government Agencies | 0 | - | 4.44 | 19,746 |
| US States Quiz | 0 | - | 5.00 | 16,956,943 |
| Name the U.S. National Parks | 0 | - | 4.86 | 60,313 |
| Total United States Immigration by Country | 0 | - | 4.91 | 112,121 |
| Most Common U.S. Last Names - Extreme | 0 | - | 4.94 | 175,230 |
| "Do Not Travel" Countries for U.S. Citizens | 0 | - | 4.97 | 245,676 |
| Top 10 Non-English Languages Spoken in New York City | 0 | - | 4.85 | 66,575 |
| States of the U.S. in Alphabetical Order | 0 | - | 4.98 | 368,182 |
| Top 10 Coldest U.S. States | 0 | - | 4.94 | 125,661 |
| Top 10 Hottest U.S. States | 0 | - | 4.86 | 126,280 |
| Top 10 U.S. States with the Least Precipitation | 0 | - | 4.83 | 62,125 |
| All 3,143 Counties of the United States on a Map | 0 | - | 4.97 | 334,332 |
| The U.S. Government - How Does it Work? | 0 | - | 4.34 | 42,432 |
| Pixelated United States Map | 0 | - | 4.88 | 94,634 |
| Most-Visited Countries by Americans | 0 | - | 4.86 | 110,234 |
| Countries that Visit the United States the Most | 0 | - | 4.96 | 92,217 |
| The 13 Colonies Quiz | 0 | - | 4.97 | 118,750 |
| U.S. States with the Letter Y | 0 | - | 4.85 | 111,964 |
| 10 Southernmost U.S. States | 0 | - | 4.89 | 113,975 |
| U.S. States with Short Names | 0 | - | 4.91 | 149,622 |
| U.S. States that Start with M | 0 | - | 4.93 | 187,981 |
| U.S. States By Population | 0 | - | 4.92 | 153,934 |
| U.S. States that Start with N | 0 | - | 4.95 | 171,961 |
| U.S. States with Longest Names | 0 | - | 4.84 | 44,739 |
| U.S. States with a Unique First Letter | 0 | - | 4.96 | 88,691 |
| 10 Westernmost U.S. States | 0 | - | 4.95 | 64,433 |
| The Only Remaining U.S. State . . . | 0 | - | 4.93 | 65,941 |
| US States with an Empty Map | 0 | - | 5.00 | 627,298 |
| Midwestern States of the U.S. | 0 | - | 4.88 | 14,040 |
| 10 Longest Rivers in the United States | 0 | - | 4.85 | 39,319 |
| Countries Closest to United States by Continent | 0 | - | 4.99 | 146,943 |
| Countries that Beat the United States | 0 | - | 4.93 | 168,285 |
| Senators Who Ran For President | 0 | - | 4.24 | 17,069 |
| U.S. Electoral College Landslides | 0 | - | 4.35 | 22,068 |
| Louisiana Purchase with a Map | 0 | - | 4.96 | 49,077 |
| Top 10 Most-Visited U.S. States | 0 | - | 4.90 | 102,254 |
| U.S. States with the Most Immigrants | 0 | - | 4.85 | 82,894 |
| U.S. States or European Countries by Area | 0 | - | 4.95 | 96,731 |
| U.S. States or European Countries by Population | 0 | - | 4.97 | 133,858 |
| Name a Valid U.S. State #1 | 0 | - | 4.93 | 209,946 |
| Top 10 Most Native American U.S. States | 0 | - | 4.87 | 92,616 |
| U.S. Citizenship Test Questions | 0 | - | 4.83 | 240,559 |
| U.S. Political Figures by Picture #1 | 0 | - | 4.14 | 26,202 |
| U.S. Political Figures by Picture #2 | 0 | - | 4.10 | 15,551 |
| Female Political Figures by Picture - U.S. | 0 | - | 4.22 | 10,887 |
| Canadian Prime Ministers | 0 | - | 4.64 | 57,791 |
| Top 10 Biggest Economies in the Americas | 0 | - | 4.94 | 92,593 |
| States of Mexico | 0 | - | 4.96 | 177,524 |
| Mexico States Map Quiz | 0 | - | 4.84 | 105,423 |
| Top U.S. Universities | 0 | - | 4.15 | 145,596 |
| 10 U.S. States With The Lowest Murder Rates | 0 | - | 4.48 | 52,662 |
| Biggest Trading Partners - United States | 0 | - | 4.63 | 106,792 |
| 10 U.S. States With The Highest Murder Rates | 0 | - | 4.47 | 54,701 |
| U.S. State Superlatives #1 | 0 | - | 4.47 | 87,629 |
| U.S. State Superlatives #2 | 0 | - | 4.53 | 40,716 |
| Top 10 U.S. States With the Most Tornadoes | 0 | - | 4.53 | 64,931 |
| Top 10 Least Religious U.S. States | 0 | - | 4.51 | 34,395 |
| Top 10 U.S. States by Public Transit | 0 | - | 4.77 | 63,945 |
| Top 10 U.S. States with the Most Precipitation | 0 | - | 4.46 | 41,788 |
| Top 10 Richest Countries in the Americas | 0 | - | 4.93 | 84,851 |
| Mexico Cities Map Quiz | 0 | - | 4.83 | 38,759 |
| U.S. State Nicknames | 0 | - | 4.47 | 50,657 |
| Countries with American Expatriates | 0 | - | 4.53 | 42,642 |
| United States Landmarks Map Quiz | 0 | - | 4.55 | 40,252 |
| United States Country Quiz | 0 | - | 4.43 | 101,975 |
| Busiest Air Routes from the U.S. | 0 | - | 4.46 | 77,016 |
| Politicians with Other Careers | 0 | - | 3.98 | 15,039 |
| Main Parts of the U.S. Budget | 0 | - | 3.45 | 8,734 |
| U.S. Presidents Quiz | 0 | - | 5.00 | 3,717,599 |
| 100 Most Influential Figures in U.S. History | 0 | - | 4.20 | 45,172 |
| Most-Visited Countries by Canadians | 0 | - | 4.83 | 39,522 |
| Countries Closest to Canada | 0 | - | 4.91 | 198,851 |
| Asian Countries Americans Travel to the Most | 0 | - | 4.75 | 60,138 |
| U.S. Geography by Letter - B | 0 | - | 4.53 | 69,814 |
| U.S. Geography by Letter - S | 0 | - | 4.55 | 53,242 |
| Two Letter U.S. State Abbreviations | 0 | - | 4.19 | 748,903 |
| Most Guessed U.S. Cities | 0 | - | 4.89 | 106,713 |
| U.S. Cities with the Biggest Economies | 0 | - | 4.83 | 73,175 |
| Countries Closest to the U. S. | 0 | - | 4.41 | 210,196 |
| American Geography Quiz for Dummies | 0 | - | 4.41 | 69,332 |
| Children of U.S. Presidents | 0 | - | 3.97 | 16,690 |
| Top 10 Non-English Languages of Los Angeles | 0 | - | 4.43 | 60,036 |
| 10 Closest Megacities to New York City | 0 | - | 4.52 | 67,482 |
| New England States | 0 | - | 4.51 | 59,870 |
| U.S. States by Land Area | 0 | - | 4.63 | 52,978 |
| Top 10 U.S. States by Inland Water Area | 0 | - | 4.53 | 38,075 |
| Add a Letter - Make a U.S. State | 0 | - | 4.70 | 83,018 |
| Top 10 Widest U.S. States East to West | 0 | - | 4.70 | 56,205 |
| Top 10 Tallest U.S. States North to South | 0 | - | 4.75 | 41,077 |
| U.S. States by Borders | 0 | - | 4.61 | 35,427 |
| U.S. States by Wikipedia Descriptions #1 | 0 | - | 4.57 | 39,425 |
| U.S. States by Wikipedia Descriptions #2 | 0 | - | 4.48 | 37,160 |
| 10 Easternmost U.S. States | 0 | - | 4.53 | 56,629 |
| The Only U.S. State ... #1 | 0 | - | 4.52 | 102,242 |
| 50 States, 50 Cities - Hard Version | 0 | - | 4.46 | 44,376 |
| Top 10 Richest U.S. States by Median Income | 0 | - | 4.47 | 119,256 |
| Countries that Beat Canada | 0 | - | 4.91 | 98,782 |
| Asian Last Names in the United States | 0 | - | 4.43 | 46,904 |
| United States Map Quiz | 0 | - | 4.98 | 4,167,200 |
| U.S. Bill of Rights | 0 | - | 4.53 | 32,576 |
| U.S. License Plates Picture Quiz | 0 | - | 4.61 | 53,065 |
| U.S. States with the Fewest Immigrants | 0 | - | 4.64 | 65,988 |
| U.S. States with the Highest Percentage of Farmland | 0 | - | 4.80 | 65,574 |
| U.S. States with the Lowest Percentage of Farmland | 0 | - | 4.74 | 55,290 |
| Walking Across U.S. State Borders with Hints | 0 | - | 4.74 | 35,105 |
| U.S. States with the Longest International Borders | 0 | - | 4.78 | 45,894 |
| Longest U.S. State Borders | 0 | - | 4.69 | 40,037 |
| Top 10 U.S. States with the Highest Elevation | 0 | - | 4.51 | 67,939 |
| 10 U.S. States with the Highest Tax Burden | 0 | - | 4.26 | 38,333 |
| Top 10 U.S. States by Manufacturing Employment | 0 | - | 4.49 | 28,861 |
| U.S. States with the Lowest Average Elevation | 0 | - | 4.55 | 38,555 |
| U.S. States With the Highest Average Elevation | 0 | - | 4.61 | 32,817 |
| U.S. States with the Fewest Borders | 0 | - | 4.78 | 114,101 |
| U.S. States with the Most Borders | 0 | - | 4.53 | 62,340 |
| U.S. States With No City Over 100,000 | 0 | - | 4.57 | 18,081 |
| Flags of North and South America | 0 | - | 4.99 | 375,658 |
| Belize Country Quiz | 0 | - | 4.85 | 21,056 |
| Largest United States Airlines | 0 | - | 4.39 | 55,118 |
| Third Most Common Language by U.S. State | 0 | - | 4.87 | 113,912 |
| U.S. Five-Star Generals and Admirals | 0 | - | 4.33 | 8,351 |
| Countries Closest to United States A-Z | 0 | - | 4.82 | 118,528 |
| All U.S. Supreme Court Justices | 0 | - | 4.54 | 29,129 |
| All U.S. Supreme Court Justices Ever | 0 | - | 4.50 | 11,849 |
| U.S. Presidents by Picture | 0 | - | 4.87 | 427,849 |
| Florida Pro Sport Teams | 0 | - | 4.61 | 11,888 |
| Events in U.S. History | 0 | - | 4.41 | 28,776 |
| U.S. Geography by Letter - C | 0 | - | 4.27 | 74,406 |
| U.S. Geography by Letter - A | 0 | - | 4.37 | 63,436 |
| U.S. Geography by Letter - D | 0 | - | 4.09 | 57,399 |
| U.S. Geography by Letter - T | 0 | - | 4.29 | 50,125 |
| U.S. Geography by Letter - P | 0 | - | 4.38 | 54,303 |
| U.S. Geography by Letter - M | 0 | - | 4.14 | 53,557 |
| U.S. Geography by Letter - L | 0 | - | 4.04 | 41,440 |
| U.S. Geography by Letter - G | 0 | - | 4.13 | 39,602 |
| U.S. Geography by Letter - R | 0 | - | 4.22 | 36,701 |
| U.S. Geography By Letter - H | 0 | - | 4.35 | 40,496 |
| American Legal Vocabulary | 0 | - | 4.40 | 33,987 |
| U.S. Cities by Picture #1 | 0 | - | 4.36 | 34,673 |
| Cities by Picture #2 | 0 | - | 4.19 | 35,238 |
| American Political Words | 0 | - | 4.39 | 23,451 |
| First Names of U.S. Presidents | 0 | - | 4.86 | 383,057 |
| American Founding Fathers | 0 | - | 4.42 | 23,257 |
| Famous People from California by Picture | 0 | - | 4.32 | 36,632 |
| California Groups of Things | 0 | - | 4.26 | 45,698 |
| Hawaiian Islands Map Quiz | 0 | - | 4.78 | 22,303 |
| Boston Talk to English Translation Quiz | 0 | - | 4.59 | 56,112 |
| New York Groups of Things | 0 | - | 4.39 | 71,457 |
| People on Money - United States | 0 | - | 4.31 | 63,399 |
| U.S. History Groups of Two | 0 | - | 4.23 | 44,553 |
| Last 10 U.S. States Alphabetically | 0 | - | 4.35 | 74,988 |
| Top 10 Least Populous U.S. State Capitals | 0 | - | 4.52 | 21,554 |
| Flyover States | 0 | - | 4.52 | 29,570 |
| U.S. States With Double Letters | 0 | - | 4.55 | 24,221 |
| U.S. States Bigger than Their Neighbors | 0 | - | 4.28 | 76,335 |
| States and Provinces that touch the Rocky Mountains | 0 | - | 4.43 | 32,540 |
| Name a Valid U.S. State #2 | 0 | - | 4.63 | 77,262 |
| Name a Valid U.S. State #3 | 0 | - | 4.78 | 49,210 |
| 50 States, 50 Cities - Easy Version | 0 | - | 4.39 | 128,802 |
| Top 10 Least-Forested U.S. States | 0 | - | 4.50 | 46,630 |
| Famous Canadians by Picture | 0 | - | 4.39 | 49,467 |
| European Secessionist Movements on a Map | 0 | - | 4.53 | 35,123 |
| Georgia ... or Georgia? | 0 | - | 4.67 | 76,948 |
| The Only American Country ... | 0 | - | 4.92 | 122,026 |
| American Countries with the Shortest Names | 0 | - | 4.96 | 121,481 |
| U.S. State Border Crossings | 0 | - | 4.97 | 96,747 |
| U.S. Cities with the Most International Tourists | 0 | - | 4.88 | 75,784 |
| Names of Generations | 0 | - | 4.09 | 45,363 |
| Name a Valid U.S. President #1 | 0 | - | 4.89 | 193,264 |
| Cities and Towns of Massachusetts | 0 | - | 4.92 | 74,732 |
| Who Did that Motown Song? | 0 | - | 4.48 | 13,070 |
| Countries Larger Than Texas but With Fewer People | 0 | - | 4.92 | 40,161 |
| Regions of U.S. States | 0 | - | 4.37 | 44,093 |
| States, Provinces & Territories that Touch the Appalachian Mountains | 0 | - | 4.59 | 20,406 |
| 10 U.S. States with the Most Valuable Crops | 0 | - | 4.41 | 29,615 |
| U.S. States with the Lowest HDI | 0 | - | 4.47 | 28,910 |
| Which U.S. State - Multiple Choice | 0 | - | 4.48 | 20,344 |
| Movies by State | 0 | - | 4.27 | 40,588 |
| U.S. States with the Fewest Traffic Fatalities | 0 | - | 4.20 | 21,184 |
| U.S. States with the Most Traffic Fatalities | 0 | - | 4.10 | 19,186 |
| Canada Country Quiz | 0 | - | 4.54 | 132,865 |
| Canada Cities Map Quiz | 0 | - | 4.64 | 124,489 |
| Canada A-Z | 0 | - | 4.73 | 32,926 |
| Catholic Countries in Europe | 0 | - | 4.83 | 95,572 |
| Monarchies of Europe | 0 | - | 4.90 | 98,588 |
| Monarchies of Asia | 0 | - | 4.97 | 71,367 |
| Asian Country Superlatives | 0 | - | 4.84 | 81,156 |
| Mexico Country Quiz | 0 | - | 4.49 | 72,627 |
| All First-Level Subdivisions of South America on a Map | 0 | - | 4.92 | 54,485 |
| Brazil States Map Quiz | 0 | - | 4.86 | 48,404 |
| States of Brazil | 0 | - | 4.97 | 89,141 |
| Fictional Characters from the Midwest by Picture | 0 | - | 4.04 | 19,224 |
| U.S. States by Picture #1 | 0 | - | 4.21 | 15,489 |
| U.S. Cities with the Highest Murder Rate | 0 | - | 4.55 | 138,895 |
| Most-Visited U.S. Cities | 0 | - | 4.85 | 94,572 |
| Every U.S. Metro Area on a Map | 0 | - | 4.97 | 82,297 |
