| U.S. Cabinet Departments | 0 | - | 4.86 | 72,578 |
| U.S. Federal Agency Acronyms | 0 | - | 4.50 | 79,780 |
| Deadliest U.S. Wars | 0 | - | 4.89 | 189,442 |
| U.S. States by Governor | 0 | - | 4.43 | 17,994 |
| U.S. Political Parties in History | 0 | - | 4.44 | 27,592 |
| U.S. Government Agencies | 0 | - | 4.44 | 19,568 |
| US States Quiz | 0 | - | 5.00 | 16,730,445 |
| States of the U.S. in Alphabetical Order | 0 | - | 4.98 | 365,542 |
| Top 10 Coldest U.S. States | 0 | - | 4.94 | 124,016 |
| Top 10 Hottest U.S. States | 0 | - | 4.86 | 124,834 |
| Top 10 U.S. States with the Least Precipitation | 0 | - | 4.82 | 61,610 |
| Name the U.S. National Parks | 0 | - | 4.86 | 59,299 |
| Total United States Immigration by Country | 0 | - | 4.91 | 110,787 |
| Most Common U.S. Last Names - Extreme | 0 | - | 4.94 | 173,396 |
| "Do Not Travel" Countries for U.S. Citizens | 0 | - | 4.97 | 241,394 |
| Top 10 Non-English Languages Spoken in New York City | 0 | - | 4.84 | 65,733 |
| All 3,143 Counties of the United States on a Map | 0 | - | 4.97 | 328,758 |
| The U.S. Government - How Does it Work? | 0 | - | 4.34 | 42,201 |
| Pixelated United States Map | 0 | - | 4.89 | 93,618 |
| Most-Visited Countries by Americans | 0 | - | 4.87 | 108,661 |
| Countries that Visit the United States the Most | 0 | - | 4.96 | 90,986 |
| The 13 Colonies Quiz | 0 | - | 4.97 | 116,908 |
| U.S. States with the Letter Y | 0 | - | 4.85 | 110,525 |
| 10 Southernmost U.S. States | 0 | - | 4.88 | 112,577 |
| U.S. States with Short Names | 0 | - | 4.91 | 147,871 |
| U.S. States that Start with M | 0 | - | 4.93 | 186,122 |
| U.S. States By Population | 0 | - | 4.92 | 152,513 |
| U.S. States that Start with N | 0 | - | 4.95 | 170,565 |
| U.S. States with Longest Names | 0 | - | 4.84 | 43,973 |
| U.S. States with a Unique First Letter | 0 | - | 4.96 | 87,701 |
| 10 Westernmost U.S. States | 0 | - | 4.95 | 63,827 |
| The Only Remaining U.S. State . . . | 0 | - | 4.92 | 64,998 |
| 10 Longest Rivers in the United States | 0 | - | 4.85 | 38,855 |
| Countries Closest to United States by Continent | 0 | - | 4.99 | 145,575 |
| Countries that Beat the United States | 0 | - | 4.93 | 165,780 |
| Louisiana Purchase with a Map | 0 | - | 4.96 | 47,743 |
| US States with an Empty Map | 0 | - | 5.00 | 619,750 |
| Top 10 Most-Visited U.S. States | 0 | - | 4.90 | 101,189 |
| U.S. States with the Most Immigrants | 0 | - | 4.85 | 82,022 |
| U.S. States or European Countries by Area | 0 | - | 4.95 | 94,938 |
| U.S. States or European Countries by Population | 0 | - | 4.97 | 132,151 |
| Senators Who Ran For President | 0 | - | 4.24 | 16,997 |
| U.S. Electoral College Landslides | 0 | - | 4.35 | 21,995 |
| U.S. Political Figures by Picture #1 | 0 | - | 4.14 | 26,083 |
| U.S. Political Figures by Picture #2 | 0 | - | 4.10 | 15,470 |
| Female Political Figures by Picture - U.S. | 0 | - | 4.20 | 10,822 |
| Name a Valid U.S. State #1 | 0 | - | 4.93 | 207,040 |
| Top 10 Most Native American U.S. States | 0 | - | 4.87 | 91,235 |
| Canadian Prime Ministers | 0 | - | 4.63 | 57,160 |
| U.S. Citizenship Test Questions | 0 | - | 4.83 | 238,500 |
| Top 10 Biggest Economies in the Americas | 0 | - | 4.93 | 91,186 |
| States of Mexico | 0 | - | 4.95 | 173,817 |
| Mexico States Map Quiz | 0 | - | 4.84 | 103,970 |
| Top U.S. Universities | 0 | - | 4.15 | 144,240 |
| Top 10 Richest Countries in the Americas | 0 | - | 4.90 | 76,182 |
| U.S. State Nicknames Quiz | 0 | - | 4.47 | 50,332 |
| Countries with American Expatriates | 0 | - | 4.53 | 42,490 |
| United States Landmarks Map Quiz | 0 | - | 4.55 | 40,099 |
| United States Country Quiz | 0 | - | 4.43 | 100,759 |
| Busiest Air Routes from the U.S. | 0 | - | 4.46 | 76,657 |
| 10 U.S. States With The Lowest Murder Rates | 0 | - | 4.50 | 40,913 |
| Biggest Trading Partners - United States | 0 | - | 4.63 | 106,408 |
| Politicians with Other Careers | 0 | - | 3.98 | 14,993 |
| Main Parts of the U.S. Budget | 0 | - | 3.45 | 8,683 |
| U.S. Presidents Quiz | 0 | - | 5.00 | 3,661,848 |
| 100 Most Influential Figures in U.S. History | 0 | - | 4.20 | 44,758 |
| 10 U.S. States With The Highest Murder Rates | 0 | - | 4.46 | 53,100 |
| U.S. State Superlatives #1 | 0 | - | 4.47 | 87,315 |
| U.S. State Superlatives #2 | 0 | - | 4.53 | 40,501 |
| Top 10 U.S. States With the Most Tornadoes | 0 | - | 4.53 | 64,495 |
| Top 10 Least Religious U.S. States | 0 | - | 4.51 | 34,126 |
| Top 10 U.S. States by Public Transit | 0 | - | 4.77 | 63,468 |
| Top 10 U.S. States with the Most Precipitation | 0 | - | 4.46 | 41,592 |
| Countries Closest to Canada | 0 | - | 4.90 | 197,498 |
| Asian Countries Americans Travel to the Most | 0 | - | 4.75 | 59,705 |
| U.S. Geography by Letter - B | 0 | - | 4.53 | 68,858 |
| U.S. Geography by Letter - S | 0 | - | 4.55 | 52,357 |
| Two Letter U.S. State Abbreviations | 0 | - | 4.19 | 743,802 |
| Most Guessed U.S. Cities | 0 | - | 4.89 | 105,162 |
| U.S. Cities with the Biggest Economies | 0 | - | 4.84 | 72,198 |
| Countries Closest to the U. S. | 0 | - | 4.41 | 208,093 |
| Children of U.S. Presidents | 0 | - | 3.95 | 16,653 |
| Top 10 Non-English Languages of Los Angeles | 0 | - | 4.42 | 59,647 |
| 10 Closest Megacities to New York City | 0 | - | 4.52 | 67,213 |
| New England States | 0 | - | 4.51 | 59,720 |
| U.S. States by Land Area | 0 | - | 4.61 | 52,534 |
| Top 10 U.S. States by Inland Water Area | 0 | - | 4.53 | 37,902 |
| Add a Letter - Make a U.S. State | 0 | - | 4.72 | 82,410 |
| Top 10 Widest U.S. States East to West | 0 | - | 4.69 | 55,705 |
| Top 10 Tallest U.S. States North to South | 0 | - | 4.74 | 40,699 |
| U.S. States by Borders | 0 | - | 4.63 | 35,118 |
| U.S. States by Wikipedia Descriptions #1 | 0 | - | 4.57 | 39,225 |
| U.S. States by Wikipedia Descriptions #2 | 0 | - | 4.47 | 36,992 |
| 10 Easternmost U.S. States | 0 | - | 4.53 | 56,272 |
| The Only U.S. State ... #1 | 0 | - | 4.52 | 101,188 |
| 50 States, 50 Cities - Hard Version | 0 | - | 4.46 | 44,030 |
| Top 10 Richest U.S. States by Median Income | 0 | - | 4.47 | 118,613 |
| Countries that Beat Canada | 0 | - | 4.90 | 86,959 |
| Asian Last Names in the United States | 0 | - | 4.43 | 46,556 |
| United States Map Quiz | 0 | - | 4.98 | 4,144,289 |
| 10 U.S. States with the Highest Tax Burden | 0 | - | 4.26 | 38,063 |
| Top 10 U.S. States by Manufacturing Employment | 0 | - | 4.49 | 28,753 |
| U.S. States With No City Over 100,000 | 0 | - | 4.57 | 17,843 |
| Georgia ... or Georgia? | 0 | - | 4.69 | 76,487 |
| Flags of North and South America | 0 | - | 4.99 | 368,448 |
| Belize Country Quiz | 0 | - | 4.85 | 20,836 |
| Largest United States Airlines | 0 | - | 4.39 | 54,868 |
| U.S. Five-Star Generals and Admirals | 0 | - | 4.33 | 8,308 |
| Countries Closest to United States A-Z | 0 | - | 4.82 | 117,559 |
| All U.S. Supreme Court Justices | 0 | - | 4.54 | 28,895 |
| U.S. Bill of Rights | 0 | - | 4.53 | 32,388 |
| All U.S. Supreme Court Justices Ever | 0 | - | 4.49 | 11,676 |
| U.S. Presidents by Picture | 0 | - | 4.87 | 424,194 |
| Florida Pro Sport Teams | 0 | - | 4.61 | 11,768 |
| U.S. License Plates Picture Quiz | 0 | - | 4.59 | 52,696 |
| U.S. States with the Fewest Immigrants | 0 | - | 4.63 | 65,480 |
| U.S. States with the Highest Percentage of Farmland | 0 | - | 4.80 | 65,313 |
| U.S. States with the Lowest Percentage of Farmland | 0 | - | 4.74 | 55,053 |
| States and Provinces that touch the Rocky Mountains | 0 | - | 4.42 | 32,430 |
| Name a Valid U.S. State #2 | 0 | - | 4.63 | 76,561 |
| Walking Across U.S. State Borders with Hints | 0 | - | 4.74 | 34,946 |
| Name a Valid U.S. State #3 | 0 | - | 4.78 | 48,754 |
| U.S. States with the Longest International Borders | 0 | - | 4.78 | 45,629 |
| Longest U.S. State Borders | 0 | - | 4.67 | 39,453 |
| Top 10 U.S. States with the Highest Elevation | 0 | - | 4.51 | 67,790 |
| U.S. States with the Lowest Average Elevation | 0 | - | 4.55 | 38,408 |
| U.S. States With the Highest Average Elevation | 0 | - | 4.61 | 32,682 |
| U.S. States with the Fewest Borders | 0 | - | 4.77 | 113,125 |
| U.S. States with the Most Borders | 0 | - | 4.53 | 62,238 |
| U.S. Geography by Letter - C | 0 | - | 4.27 | 73,627 |
| U.S. Geography by Letter - A | 0 | - | 4.38 | 62,592 |
| U.S. Geography by Letter - D | 0 | - | 4.08 | 56,583 |
| U.S. Geography by Letter - T | 0 | - | 4.29 | 49,256 |
| U.S. Geography by Letter - P | 0 | - | 4.36 | 47,680 |
| U.S. Geography by Letter - M | 0 | - | 4.14 | 52,865 |
| U.S. Geography by Letter - L | 0 | - | 4.04 | 40,685 |
| U.S. Geography by Letter - G | 0 | - | 4.13 | 38,824 |
| U.S. Geography By Letter - H | 0 | - | 4.35 | 39,591 |
| Third Most Common Language by U.S. State | 0 | - | 4.87 | 113,429 |
| American Legal Vocabulary | 0 | - | 4.40 | 33,806 |
| U.S. Cities by Picture #1 | 0 | - | 4.37 | 34,382 |
| Cities by Picture #2 | 0 | - | 4.19 | 34,970 |
| American Political Words | 0 | - | 4.39 | 23,349 |
| First Names of U.S. Presidents | 0 | - | 4.85 | 379,881 |
| American Founding Fathers | 0 | - | 4.41 | 23,085 |
| Famous People from California by Picture | 0 | - | 4.32 | 36,189 |
| California Groups of Things | 0 | - | 4.25 | 45,297 |
| Hawaiian Islands Map Quiz | 0 | - | 4.78 | 22,214 |
| New York Groups of Things | 0 | - | 4.38 | 59,974 |
| People on Money - United States | 0 | - | 4.31 | 63,229 |
| U.S. History Groups of Two | 0 | - | 4.23 | 44,281 |
| Last 10 U.S. States Alphabetically | 0 | - | 4.35 | 74,644 |
| Top 10 Least Populous U.S. State Capitals | 0 | - | 4.52 | 21,472 |
| Flyover States | 0 | - | 4.52 | 29,420 |
| U.S. States With Double Letters | 0 | - | 4.54 | 23,957 |
| U.S. States Bigger than Their Neighbors | 0 | - | 4.27 | 75,871 |
| 50 States, 50 Cities - Easy Version | 0 | - | 4.39 | 128,057 |
| Top 10 Least-Forested U.S. States | 0 | - | 4.50 | 46,353 |
| Famous Canadians by Picture | 0 | - | 4.39 | 49,175 |
| European Secessionist Movements on a Map | 0 | - | 4.53 | 34,793 |
| The Only American Country ... | 0 | - | 4.92 | 120,895 |
| American Countries with the Shortest Names | 0 | - | 4.96 | 120,445 |
| U.S. State Border Crossings | 0 | - | 4.97 | 96,039 |
| U.S. Cities with the Most International Tourists | 0 | - | 4.88 | 74,981 |
| Name a Valid U.S. President #1 | 0 | - | 4.89 | 190,167 |
| Cities and Towns of Massachusetts | 0 | - | 4.92 | 73,180 |
| Who Did that Motown Song? | 0 | - | 4.48 | 13,025 |
| Countries Larger Than Texas but With Fewer People | 0 | - | 4.92 | 39,578 |
| Regions of U.S. States | 0 | - | 4.37 | 43,538 |
| States, Provinces & Territories that Touch the Appalachian Mountains | 0 | - | 4.59 | 20,346 |
| 10 U.S. States with the Most Valuable Crops | 0 | - | 4.41 | 29,505 |
| U.S. States with the Lowest HDI | 0 | - | 4.46 | 28,783 |
| Which U.S. State - Multiple Choice | 0 | - | 4.48 | 20,218 |
| Movies by State | 0 | - | 4.27 | 40,459 |
| U.S. States with the Fewest Traffic Fatalities | 0 | - | 4.20 | 21,077 |
| U.S. States with the Most Traffic Fatalities | 0 | - | 4.10 | 19,061 |
| Canada Country Quiz | 0 | - | 4.55 | 131,866 |
| Canada Cities Map Quiz | 0 | - | 4.63 | 123,720 |
| Canada A-Z | 0 | - | 4.73 | 32,679 |
| Catholic Countries in Europe | 0 | - | 4.83 | 94,352 |
| Monarchies of Europe | 0 | - | 4.90 | 97,475 |
| Monarchies of Asia | 0 | - | 4.97 | 70,681 |
| Asian Country Superlatives | 0 | - | 4.83 | 80,501 |
| Top 10 Richest Countries in Africa | 0 | - | 4.85 | 75,236 |
| Top 10 Biggest Economies in Africa | 0 | - | 4.99 | 119,473 |
| Category Elimination - African Geography #1 | 0 | - | 4.90 | 91,243 |
| Top 10 American Countries by Coastline | 0 | - | 4.96 | 88,114 |
| U.S. Geography by Letter - N | 0 | - | 3.79 | 52,402 |
| U.S. Geography by Letter - E | 0 | - | 3.75 | 48,413 |
| U.S. Geography by Letter - F | 0 | - | 3.87 | 44,665 |
| U.S. Geography by Letter - O | 0 | - | 3.52 | 40,525 |
| U.S. Geography by Letter - R | 0 | - | 4.18 | 30,515 |
| Mexico Country Quiz | 0 | - | 4.49 | 72,068 |
| Mexico Cities Map Quiz | 0 | - | 4.77 | 33,331 |
| All First-Level Subdivisions of South America on a Map | 0 | - | 4.92 | 53,135 |
| Brazil States Map Quiz | 0 | - | 4.85 | 47,507 |
| States of Brazil | 0 | - | 4.98 | 86,667 |
| Colombia Country Quiz | 0 | - | 4.90 | 40,409 |
| 15 Largest Cities in North America With a Map | 0 | - | 4.98 | 46,564 |
| 100 Biggest Cities in North America on a Map | 0 | - | 4.84 | 61,639 |
