| U.S. Cabinet Departments | 0 | - | 4.86 | 73,129 |
| U.S. Federal Agency Acronyms | 0 | - | 4.50 | 80,161 |
| Deadliest U.S. Wars | 0 | - | 4.89 | 191,870 |
| U.S. States by Governor | 0 | - | 4.43 | 18,117 |
| U.S. Political Parties in History | 0 | - | 4.44 | 27,772 |
| U.S. Government Agencies | 0 | - | 4.44 | 19,788 |
| US States Quiz | 0 | - | 5.00 | 17,007,674 |
| Name the U.S. National Parks | 0 | - | 4.86 | 60,533 |
| Total United States Immigration by Country | 0 | - | 4.91 | 112,470 |
| Most Common U.S. Last Names - Extreme | 0 | - | 4.94 | 175,628 |
| "Do Not Travel" Countries for U.S. Citizens | 0 | - | 4.97 | 246,725 |
| Top 10 Non-English Languages Spoken in New York City | 0 | - | 4.85 | 66,765 |
| States of the U.S. in Alphabetical Order | 0 | - | 4.98 | 368,768 |
| Top 10 Coldest U.S. States | 0 | - | 4.94 | 125,927 |
| Top 10 Hottest U.S. States | 0 | - | 4.86 | 126,582 |
| Top 10 U.S. States with the Least Precipitation | 0 | - | 4.83 | 62,237 |
| All 3,143 Counties of the United States on a Map | 0 | - | 4.97 | 335,834 |
| The U.S. Government - How Does it Work? | 0 | - | 4.34 | 42,485 |
| Pixelated United States Map | 0 | - | 4.89 | 94,853 |
| Most-Visited Countries by Americans | 0 | - | 4.86 | 110,634 |
| Countries that Visit the United States the Most | 0 | - | 4.96 | 92,506 |
| The 13 Colonies Quiz | 0 | - | 4.97 | 119,127 |
| U.S. States with the Letter Y | 0 | - | 4.86 | 112,341 |
| 10 Southernmost U.S. States | 0 | - | 4.89 | 114,366 |
| U.S. States with Short Names | 0 | - | 4.91 | 150,424 |
| U.S. States that Start with M | 0 | - | 4.93 | 188,447 |
| U.S. States By Population | 0 | - | 4.92 | 154,202 |
| U.S. States that Start with N | 0 | - | 4.95 | 172,295 |
| U.S. States with Longest Names | 0 | - | 4.85 | 44,931 |
| U.S. States with a Unique First Letter | 0 | - | 4.96 | 88,910 |
| 10 Westernmost U.S. States | 0 | - | 4.95 | 64,564 |
| The Only Remaining U.S. State . . . | 0 | - | 4.93 | 66,150 |
| US States with an Empty Map | 0 | - | 5.00 | 629,078 |
| Midwestern States of the U.S. | 0 | - | 4.88 | 14,187 |
| 10 Longest Rivers in the United States | 0 | - | 4.85 | 39,417 |
| Countries Closest to United States by Continent | 0 | - | 4.99 | 147,299 |
| Countries that Beat the United States | 0 | - | 4.93 | 168,760 |
| Senators Who Ran For President | 0 | - | 4.24 | 17,088 |
| U.S. Electoral College Landslides | 0 | - | 4.35 | 22,092 |
| Louisiana Purchase with a Map | 0 | - | 4.96 | 49,377 |
| Top 10 Most-Visited U.S. States | 0 | - | 4.90 | 102,523 |
| U.S. States with the Most Immigrants | 0 | - | 4.85 | 83,064 |
| U.S. States or European Countries by Area | 0 | - | 4.95 | 97,266 |
| U.S. States or European Countries by Population | 0 | - | 4.97 | 134,483 |
| Name a Valid U.S. State #1 | 0 | - | 4.93 | 210,663 |
| Top 10 Most Native American U.S. States | 0 | - | 4.87 | 92,921 |
| U.S. Citizenship Test Questions | 0 | - | 4.83 | 240,884 |
| U.S. Political Figures by Picture #1 | 0 | - | 4.14 | 26,219 |
| U.S. Political Figures by Picture #2 | 0 | - | 4.10 | 15,566 |
| Female Political Figures by Picture - U.S. | 0 | - | 4.22 | 10,907 |
| Canadian Prime Ministers | 0 | - | 4.64 | 57,959 |
| Top 10 Biggest Economies in the Americas | 0 | - | 4.94 | 92,890 |
| States of Mexico | 0 | - | 4.96 | 178,444 |
| Mexico States Map Quiz | 0 | - | 4.85 | 105,707 |
| Top U.S. Universities | 0 | - | 4.15 | 145,895 |
| 10 U.S. States With The Lowest Murder Rates | 0 | - | 4.48 | 53,050 |
| Biggest Trading Partners - United States | 0 | - | 4.63 | 106,899 |
| 10 U.S. States With The Highest Murder Rates | 0 | - | 4.47 | 54,858 |
| U.S. State Superlatives #1 | 0 | - | 4.47 | 87,694 |
| U.S. State Superlatives #2 | 0 | - | 4.53 | 40,770 |
| Top 10 U.S. States With the Most Tornadoes | 0 | - | 4.53 | 65,022 |
| Top 10 Least Religious U.S. States | 0 | - | 4.51 | 34,460 |
| Top 10 U.S. States by Public Transit | 0 | - | 4.74 | 64,054 |
| Top 10 U.S. States with the Most Precipitation | 0 | - | 4.46 | 41,834 |
| Top 10 Richest Countries in the Americas | 0 | - | 4.94 | 95,484 |
| Mexico Cities Map Quiz | 0 | - | 4.83 | 38,839 |
| U.S. State Nicknames | 0 | - | 4.47 | 50,768 |
| Countries with American Expatriates | 0 | - | 4.53 | 42,682 |
| United States Landmarks Map Quiz | 0 | - | 4.55 | 40,287 |
| United States Country Quiz | 0 | - | 4.43 | 102,264 |
| Busiest Air Routes from the U.S. | 0 | - | 4.46 | 77,083 |
| Politicians with Other Careers | 0 | - | 3.98 | 15,054 |
| Main Parts of the U.S. Budget | 0 | - | 3.45 | 8,746 |
| U.S. Presidents Quiz | 0 | - | 5.00 | 3,728,091 |
| 100 Most Influential Figures in U.S. History | 0 | - | 4.20 | 45,244 |
| Most-Visited Countries by Canadians | 0 | - | 4.83 | 39,641 |
| Countries Closest to Canada | 0 | - | 4.91 | 199,551 |
| Asian Countries Americans Travel to the Most | 0 | - | 4.75 | 60,230 |
| U.S. Geography by Letter - B | 0 | - | 4.54 | 70,090 |
| U.S. Geography by Letter - S | 0 | - | 4.55 | 58,176 |
| Two Letter U.S. State Abbreviations | 0 | - | 4.19 | 750,011 |
| Most Guessed U.S. Cities | 0 | - | 4.89 | 107,093 |
| U.S. Cities with the Biggest Economies | 0 | - | 4.83 | 73,510 |
| Countries Closest to the U. S. | 0 | - | 4.41 | 210,610 |
| American Geography Quiz for Dummies | 0 | - | 4.41 | 69,457 |
| Children of U.S. Presidents | 0 | - | 3.97 | 16,697 |
| Top 10 Non-English Languages of Los Angeles | 0 | - | 4.43 | 60,134 |
| 10 Closest Megacities to New York City | 0 | - | 4.52 | 67,546 |
| New England States | 0 | - | 4.51 | 59,906 |
| U.S. States by Land Area | 0 | - | 4.55 | 53,090 |
| Top 10 U.S. States by Inland Water Area | 0 | - | 4.53 | 38,127 |
| Add a Letter - Make a U.S. State | 0 | - | 4.70 | 83,181 |
| Top 10 Widest U.S. States East to West | 0 | - | 4.70 | 56,305 |
| Top 10 Tallest U.S. States North to South | 0 | - | 4.75 | 41,161 |
| U.S. States by Borders | 0 | - | 4.62 | 35,493 |
| U.S. States by Wikipedia Descriptions #1 | 0 | - | 4.57 | 39,469 |
| U.S. States by Wikipedia Descriptions #2 | 0 | - | 4.48 | 37,195 |
| 10 Easternmost U.S. States | 0 | - | 4.53 | 56,698 |
| The Only U.S. State ... #1 | 0 | - | 4.52 | 102,367 |
| 50 States, 50 Cities - Hard Version | 0 | - | 4.46 | 44,459 |
| Top 10 Richest U.S. States by Median Income | 0 | - | 4.46 | 119,357 |
| Countries that Beat Canada | 0 | - | 4.90 | 99,052 |
| Asian Last Names in the United States | 0 | - | 4.43 | 46,978 |
| United States Map Quiz | 0 | - | 4.98 | 4,172,354 |
| U.S. Bill of Rights | 0 | - | 4.53 | 32,605 |
| U.S. License Plates Picture Quiz | 0 | - | 4.61 | 53,163 |
| U.S. States with the Fewest Immigrants | 0 | - | 4.64 | 66,125 |
| U.S. States with the Highest Percentage of Farmland | 0 | - | 4.80 | 65,670 |
| U.S. States with the Lowest Percentage of Farmland | 0 | - | 4.70 | 61,282 |
| Walking Across U.S. State Borders with Hints | 0 | - | 4.75 | 35,123 |
| U.S. States with the Longest International Borders | 0 | - | 4.78 | 45,968 |
| Longest U.S. State Borders | 0 | - | 4.69 | 40,162 |
| Top 10 U.S. States with the Highest Elevation | 0 | - | 4.51 | 67,989 |
| 10 U.S. States with the Highest Tax Burden | 0 | - | 4.26 | 38,394 |
| Top 10 U.S. States by Manufacturing Employment | 0 | - | 4.49 | 28,884 |
| U.S. States with the Lowest Average Elevation | 0 | - | 4.55 | 38,576 |
| U.S. States With the Highest Average Elevation | 0 | - | 4.61 | 32,842 |
| U.S. States with the Fewest Borders | 0 | - | 4.78 | 114,288 |
| U.S. States with the Most Borders | 0 | - | 4.53 | 62,377 |
| U.S. States With No City Over 100,000 | 0 | - | 4.57 | 18,144 |
| Flags of North and South America | 0 | - | 4.99 | 377,467 |
| Belize Country Quiz | 0 | - | 4.85 | 21,107 |
| Largest United States Airlines | 0 | - | 4.39 | 55,174 |
| Third Most Common Language by U.S. State | 0 | - | 4.87 | 114,006 |
| U.S. Five-Star Generals and Admirals | 0 | - | 4.33 | 8,362 |
| Countries Closest to United States A-Z | 0 | - | 4.82 | 118,776 |
| All U.S. Supreme Court Justices | 0 | - | 4.54 | 29,152 |
| All U.S. Supreme Court Justices Ever | 0 | - | 4.50 | 11,868 |
| U.S. Presidents by Picture | 0 | - | 4.87 | 428,673 |
| Florida Pro Sport Teams | 0 | - | 4.61 | 11,911 |
| Events in U.S. History | 0 | - | 4.41 | 28,834 |
| U.S. Geography by Letter - C | 0 | - | 4.27 | 74,644 |
| U.S. Geography by Letter - A | 0 | - | 4.37 | 63,683 |
| U.S. Geography by Letter - D | 0 | - | 4.09 | 57,647 |
| U.S. Geography by Letter - T | 0 | - | 4.29 | 50,417 |
| U.S. Geography by Letter - P | 0 | - | 4.38 | 54,567 |
| U.S. Geography by Letter - M | 0 | - | 4.14 | 53,749 |
| U.S. Geography by Letter - L | 0 | - | 4.04 | 41,677 |
| U.S. Geography by Letter - G | 0 | - | 4.13 | 39,827 |
| U.S. Geography by Letter - R | 0 | - | 4.22 | 37,034 |
| U.S. Geography By Letter - H | 0 | - | 4.35 | 40,758 |
| American Legal Vocabulary | 0 | - | 4.40 | 34,030 |
| U.S. Cities by Picture #1 | 0 | - | 4.36 | 34,740 |
| Cities by Picture #2 | 0 | - | 4.19 | 35,309 |
| American Political Words | 0 | - | 4.39 | 23,480 |
| First Names of U.S. Presidents | 0 | - | 4.86 | 383,736 |
| American Founding Fathers | 0 | - | 4.42 | 23,276 |
| Famous People from California by Picture | 0 | - | 4.32 | 36,730 |
| California Groups of Things | 0 | - | 4.26 | 45,789 |
| Hawaiian Islands Map Quiz | 0 | - | 4.78 | 22,322 |
| Boston Talk to English Translation Quiz | 0 | - | 4.59 | 56,272 |
| New York Groups of Things | 0 | - | 4.39 | 72,231 |
| People on Money - United States | 0 | - | 4.31 | 63,441 |
| U.S. History Groups of Two | 0 | - | 4.23 | 44,598 |
| Last 10 U.S. States Alphabetically | 0 | - | 4.35 | 75,071 |
| Top 10 Least Populous U.S. State Capitals | 0 | - | 4.52 | 21,574 |
| Flyover States | 0 | - | 4.53 | 29,603 |
| U.S. States With Double Letters | 0 | - | 4.55 | 24,282 |
| U.S. States Bigger than Their Neighbors | 0 | - | 4.28 | 76,429 |
| States and Provinces that touch the Rocky Mountains | 0 | - | 4.43 | 32,570 |
| Name a Valid U.S. State #2 | 0 | - | 4.63 | 77,418 |
| Name a Valid U.S. State #3 | 0 | - | 4.78 | 49,321 |
| 50 States, 50 Cities - Easy Version | 0 | - | 4.39 | 129,004 |
| Top 10 Least-Forested U.S. States | 0 | - | 4.50 | 46,692 |
| Famous Canadians by Picture | 0 | - | 4.39 | 49,520 |
| European Secessionist Movements on a Map | 0 | - | 4.53 | 35,212 |
| Georgia ... or Georgia? | 0 | - | 4.68 | 77,063 |
| The Only American Country ... | 0 | - | 4.92 | 122,261 |
| American Countries with the Shortest Names | 0 | - | 4.97 | 121,715 |
| U.S. State Border Crossings | 0 | - | 4.97 | 96,923 |
| U.S. Cities with the Most International Tourists | 0 | - | 4.88 | 75,999 |
| Names of Generations | 0 | - | 4.09 | 45,557 |
| Name a Valid U.S. President #1 | 0 | - | 4.89 | 193,896 |
| Cities and Towns of Massachusetts | 0 | - | 4.93 | 75,091 |
| Who Did that Motown Song? | 0 | - | 4.48 | 13,078 |
| Countries Larger Than Texas but With Fewer People | 0 | - | 4.92 | 40,293 |
| Regions of U.S. States | 0 | - | 4.37 | 44,216 |
| States, Provinces & Territories that Touch the Appalachian Mountains | 0 | - | 4.59 | 20,428 |
| 10 U.S. States with the Most Valuable Crops | 0 | - | 4.41 | 29,634 |
| U.S. States with the Lowest HDI | 0 | - | 4.47 | 28,939 |
| Which U.S. State - Multiple Choice | 0 | - | 4.48 | 20,377 |
| Movies by State | 0 | - | 4.27 | 40,612 |
| U.S. States with the Fewest Traffic Fatalities | 0 | - | 4.20 | 21,206 |
| U.S. States with the Most Traffic Fatalities | 0 | - | 4.10 | 19,214 |
| Canada Country Quiz | 0 | - | 4.55 | 133,093 |
| Canada Cities Map Quiz | 0 | - | 4.64 | 124,641 |
| Canada A-Z | 0 | - | 4.73 | 32,981 |
| Catholic Countries in Europe | 0 | - | 4.83 | 95,829 |
| Monarchies of Europe | 0 | - | 4.90 | 98,946 |
| Monarchies of Asia | 0 | - | 4.97 | 71,550 |
| Asian Country Superlatives | 0 | - | 4.84 | 81,319 |
| Mexico Country Quiz | 0 | - | 4.49 | 72,787 |
| All First-Level Subdivisions of South America on a Map | 0 | - | 4.93 | 54,944 |
| Brazil States Map Quiz | 0 | - | 4.86 | 48,659 |
| States of Brazil | 0 | - | 4.98 | 89,879 |
| Fictional Characters from the Midwest by Picture | 0 | - | 4.04 | 19,236 |
| U.S. States by Picture #1 | 0 | - | 4.21 | 15,518 |
| U.S. Cities with the Highest Murder Rate | 0 | - | 4.55 | 139,045 |
| Most-Visited U.S. Cities | 0 | - | 4.85 | 95,125 |
| Every U.S. Metro Area on a Map | 0 | - | 4.97 | 83,245 |
