| U.S. Cabinet Departments | 0 | - | 4.85 | 67,902 |
| U.S. Federal Agency Acronyms | 0 | - | 4.51 | 76,342 |
| Deadliest U.S. Wars | 0 | - | 4.83 | 159,125 |
| U.S. States by Governor Quiz | 0 | - | 4.42 | 17,007 |
| U.S. Political Parties in History | 0 | - | 4.43 | 26,257 |
| U.S. Government Agencies | 0 | - | 4.41 | 17,787 |
| US States Quiz | 0 | - | 5.00 | 14,875,714 |
| Asian Countries Americans Travel to the Most | 0 | - | 4.84 | 55,327 |
| Total United States Immigration by Country | 0 | - | 4.89 | 97,430 |
| Most Common U.S. Last Names - Extreme | 0 | - | 4.93 | 148,181 |
| "Do Not Travel" Countries for U.S. Citizens | 0 | - | 4.94 | 187,047 |
| States of the U.S. in Alphabetical Order | 0 | - | 4.97 | 341,633 |
| Top 10 Coldest U.S. States | 0 | - | 4.91 | 100,832 |
| Top 10 Hottest U.S. States | 0 | - | 4.86 | 101,578 |
| Top 10 U.S. States with the Least Precipitation | 0 | - | 4.82 | 57,288 |
| The U.S. Government - How Does it Work? | 0 | - | 4.32 | 40,021 |
| Pixelated United States Map | 0 | - | 4.90 | 82,921 |
| Most-Visited Countries by Americans | 0 | - | 4.87 | 94,347 |
| Countries that Visit the United States the Most | 0 | - | 4.95 | 79,515 |
| The 13 Colonies Quiz | 0 | - | 4.97 | 101,178 |
| U.S. States with the Letter Y | 0 | - | 4.86 | 96,946 |
| 10 Southernmost U.S. States | 0 | - | 4.84 | 100,046 |
| U.S. States with Short Names | 0 | - | 4.87 | 131,053 |
| U.S. States that Start with M | 0 | - | 4.91 | 151,624 |
| U.S. States By Population | 0 | - | 4.90 | 130,824 |
| U.S. States that Start with N | 0 | - | 4.95 | 156,305 |
| U.S. States with Longest Names | 0 | - | 4.85 | 36,420 |
| U.S. States with a Unique First Letter | 0 | - | 4.95 | 78,412 |
| 10 Westernmost U.S. States | 0 | - | 4.95 | 58,703 |
| The Only Remaining U.S. State . . . | 0 | - | 4.94 | 56,605 |
| US States with an Empty Map | 0 | - | 5.00 | 558,856 |
| 10 Longest Rivers in the United States | 0 | - | 4.82 | 35,251 |
| All 3,143 Counties of the United States on a Map | 0 | - | 4.96 | 278,149 |
| Countries Closest to United States by Continent | 0 | - | 4.99 | 125,461 |
| Countries that Beat the United States | 0 | - | 4.92 | 146,978 |
| Senators Who Ran For President | 0 | - | 4.28 | 16,338 |
| U.S. Electoral College Landslides | 0 | - | 4.33 | 21,060 |
| Louisiana Purchase with a Map | 0 | - | 4.95 | 36,772 |
| U.S. States with the Longest International Borders | 0 | - | 4.81 | 41,640 |
| Top 10 Most-Visited U.S. States | 0 | - | 4.90 | 90,169 |
| U.S. States with the Most Immigrants | 0 | - | 4.85 | 73,747 |
| U.S. States or European Countries by Area | 0 | - | 4.95 | 72,114 |
| U.S. States or European Countries by Population | 0 | - | 4.98 | 116,699 |
| Hawaiian Islands Map Quiz | 0 | - | 4.88 | 21,156 |
| Name a Valid U.S. State #1 | 0 | - | 4.95 | 186,347 |
| Top 10 Most Native American U.S. States | 0 | - | 4.84 | 71,887 |
| U.S. Citizenship Test Questions | 0 | - | 4.86 | 223,139 |
| U.S. Political Figures by Picture #1 | 0 | - | 4.11 | 25,152 |
| U.S. Political Figures by Picture #2 | 0 | - | 4.08 | 14,808 |
| Female Political Figures by Picture - U.S. | 0 | - | 4.17 | 10,143 |
| Canadian Prime Ministers Quiz | 0 | - | 4.64 | 50,160 |
| Top 10 Biggest Economies in the Americas | 0 | - | 4.94 | 82,176 |
| States of Mexico | 0 | - | 4.95 | 143,354 |
| Mexico States Map Quiz | 0 | - | 4.84 | 91,301 |
| Top U.S. Universities | 0 | - | 4.12 | 114,114 |
| 10 U.S. States With The Lowest Murder Rates | 0 | - | 4.52 | 34,235 |
| Biggest Trading Partners - US | 0 | - | 4.63 | 102,053 |
| 10 U.S. States With The Highest Murder Rates | 0 | - | 4.44 | 47,795 |
| U.S. State Superlatives #1 | 0 | - | 4.46 | 75,707 |
| U.S. State Superlatives #2 | 0 | - | 4.51 | 37,494 |
| Top 10 U.S. States With the Most Tornadoes | 0 | - | 4.54 | 60,867 |
| Top 10 U.S. States by Public Transit | 0 | - | 4.79 | 58,865 |
| Top 10 U.S. States with the Most Precipitation | 0 | - | 4.46 | 39,524 |
| Top 10 Richest Countries in the Americas | 0 | - | 4.88 | 68,929 |
| U.S. State Nicknames Quiz | 0 | - | 4.48 | 46,486 |
| U.S. National Parks Quiz | 0 | - | 4.78 | 47,187 |
| Countries with American Expatriates | 0 | - | 4.58 | 41,051 |
| United States Landmarks Map Quiz | 0 | - | 4.55 | 38,464 |
| United States Country Quiz | 0 | - | 4.44 | 90,001 |
| Busiest Air Routes from the U.S. | 0 | - | 4.47 | 72,833 |
| Politicians with Other Careers Quiz | 0 | - | 3.94 | 14,584 |
| Main Parts of the U.S. Budget | 0 | - | 3.55 | 8,184 |
| U.S. Presidents Quiz | 0 | - | 5.00 | 3,199,148 |
| Top 10 Non-English Languages Spoken in New York City | 0 | - | 4.78 | 57,594 |
| 100 Most Influential Figures in U.S. History | 0 | - | 4.20 | 41,480 |
| Countries Closest to Canada | 0 | - | 4.90 | 185,349 |
| Asian Last Names in the United States | 0 | - | 4.41 | 43,531 |
| Canada or Africa by Area | 0 | - | 4.81 | 14,030 |
| Two Letter U.S. State Abbreviations | 0 | - | 4.18 | 704,554 |
| Most Guessed U.S. Cities | 0 | - | 4.88 | 92,084 |
| U.S. Cities with the Biggest Economies | 0 | - | 4.83 | 62,057 |
| Countries Closest to the U. S. | 0 | - | 4.41 | 199,382 |
| American Political Words | 0 | - | 4.41 | 22,388 |
| Children of U.S. Presidents | 0 | - | 3.92 | 16,226 |
| 10 Closest Megacities to New York City | 0 | - | 4.51 | 64,457 |
| New England States | 0 | - | 4.52 | 52,508 |
| US States by Land Area | 0 | - | 4.54 | 48,738 |
| Top 10 U.S. States by Inland Water Area | 0 | - | 4.53 | 36,317 |
| Add a Letter - Make a U.S. State | 0 | - | 4.75 | 76,932 |
| Top 10 Widest U.S. States East to West | 0 | - | 4.69 | 51,392 |
| Top 10 Tallest U.S. States North to South | 0 | - | 4.78 | 37,499 |
| U.S. States by Wikipedia Descriptions #1 | 0 | - | 4.57 | 37,540 |
| U.S. States by Wikipedia Descriptions #2 | 0 | - | 4.47 | 35,463 |
| 10 Easternmost U.S. States | 0 | - | 4.54 | 53,193 |
| The Only U.S. State ... #1 | 0 | - | 4.51 | 82,931 |
| 50 States, 50 Cities - Hard Version | 0 | - | 4.47 | 40,705 |
| Top 10 Richest U.S. States by Median Income | 0 | - | 4.47 | 103,699 |
| United States Map Quiz | 0 | - | 4.98 | 3,920,034 |
| U.S. License Plates Picture Quiz | 0 | - | 4.59 | 49,387 |
| U.S. States with the Fewest Immigrants | 0 | - | 4.69 | 60,295 |
| U.S. States with the Highest Percentage of Farmland | 0 | - | 4.75 | 54,207 |
| U.S. States with the Lowest Percentage of Farmland | 0 | - | 4.76 | 53,072 |
| Longest U.S. State Borders | 0 | - | 4.59 | 34,602 |
| Top 10 U.S. States with the Highest Elevation | 0 | - | 4.51 | 58,434 |
| 10 U.S. States with the Highest Tax Burden | 0 | - | 4.27 | 35,066 |
| Top 10 Least Religious U.S. States | 0 | - | 4.51 | 31,392 |
| Top 10 U.S. States by Manufacturing Employment | 0 | - | 4.51 | 27,651 |
| U.S. States with the Lowest Average Elevation | 0 | - | 4.54 | 31,835 |
| U.S. States with the Fewest Borders | 0 | - | 4.76 | 106,213 |
| U.S. States with the Most Borders | 0 | - | 4.56 | 61,151 |
| Belize Country Quiz | 0 | - | 4.88 | 18,928 |
| Largest United States Airlines | 0 | - | 4.38 | 52,213 |
| Third Most Common Language by U.S. State | 0 | - | 4.90 | 107,493 |
| U.S. Five-Star Generals and Admirals | 0 | - | 4.38 | 7,899 |
| Countries Closest to United States A-Z | 0 | - | 4.84 | 108,042 |
| All U.S. Supreme Court Justices | 0 | - | 4.49 | 27,389 |
| U.S. Presidents by Picture | 0 | - | 4.85 | 396,561 |
| Florida Pro Sport Teams | 0 | - | 4.66 | 10,434 |
| Georgia ... or Georgia? | 0 | - | 4.79 | 72,326 |
| American Legal Vocabulary | 0 | - | 4.40 | 32,265 |
| U.S. Cities by Picture #1 | 0 | - | 4.37 | 31,927 |
| Cities by Picture #2 | 0 | - | 4.22 | 32,568 |
| First Names of U.S. Presidents | 0 | - | 4.86 | 355,081 |
| Famous People from California by Picture | 0 | - | 4.31 | 32,142 |
| California Groups of Things | 0 | - | 4.23 | 43,021 |
| Top 10 Non-English Languages of Los Angeles | 0 | - | 4.40 | 55,977 |
| New York Groups of Things | 0 | - | 4.39 | 57,486 |
| Famous People from Texas by Picture | 0 | - | 4.04 | 31,718 |
| People on Money - United States | 0 | - | 4.31 | 61,889 |
| U.S. History Groups of Two | 0 | - | 4.28 | 35,508 |
| Last 10 U.S. States Alphabetically | 0 | - | 4.34 | 71,089 |
| Top 10 Least Populous U.S. State Capitals | 0 | - | 4.49 | 20,559 |
| Flyover States | 0 | - | 4.51 | 28,090 |
| U.S. States With Double Letters | 0 | - | 4.67 | 4,405 |
| U.S. States Bigger than Their Neighbors | 0 | - | 4.30 | 58,104 |
| U.S. States by Borders | 0 | - | 4.56 | 26,483 |
| Name a Valid U.S. State #2 | 0 | - | 4.63 | 69,917 |
| Name a Valid U.S. State #3 | 0 | - | 4.78 | 44,399 |
| 50 States, 50 Cities - Easy Version | 0 | - | 4.38 | 121,297 |
| Top 10 Least-Forested U.S. States | 0 | - | 4.49 | 35,240 |
| Famous Canadians by Picture | 0 | - | 4.46 | 29,983 |
| European Secessionist Movements on a Map | 0 | - | 4.51 | 31,669 |
| Monarchies of Asia | 0 | - | 4.95 | 54,443 |
| Flags of North and South America Quiz | 0 | - | 4.99 | 312,909 |
| The Only American Country ... | 0 | - | 4.94 | 110,563 |
| American Countries with the Shortest Names | 0 | - | 4.96 | 101,546 |
| U.S. State Border Crossings | 0 | - | 4.96 | 82,509 |
| Five Biggest Immigrant Groups by Decade in the US | 0 | - | 4.84 | 34,109 |
| U.S. Cities with the Most International Tourists | 0 | - | 4.88 | 65,882 |
| U.S. Bill of Rights | 0 | - | 4.53 | 31,148 |
| Name a Valid U.S. President #1 | 0 | - | 4.93 | 168,805 |
| Cities and Towns of Massachusetts | 0 | - | 4.90 | 61,325 |
| Who Did that Motown Song | 0 | - | 4.45 | 12,692 |
| States, Provinces & Territories that Touch the Appalachian Mountains | 0 | - | 4.59 | 19,809 |
| U.S. States with the Lowest HDI | 0 | - | 4.46 | 27,571 |
| Which U.S. State - Multiple Choice | 0 | - | 4.45 | 19,052 |
| Movies by State Quiz | 0 | - | 4.23 | 39,453 |
| U.S. States with the Fewest Traffic Fatalities | 0 | - | 4.21 | 19,494 |
| U.S. States with the Most Traffic Fatalities | 0 | - | 4.07 | 17,714 |
| U.S. States With the Highest Average Elevation | 0 | - | 4.60 | 31,197 |
| Canada Country Quiz | 0 | - | 4.54 | 122,124 |
| Canada Cities Map Quiz | 0 | - | 4.55 | 109,936 |
| Catholic Countries in Europe | 0 | - | 4.87 | 84,494 |
| Monarchies of Europe | 0 | - | 4.88 | 87,619 |
| English Monarchs Quiz | 0 | - | 4.91 | 450,626 |
| Top 10 Coldest Asian Countries | 0 | - | 4.95 | 116,928 |
| Top 10 Biggest Economies in Asia | 0 | - | 4.88 | 102,625 |
| Top 10 Biggest Economies in Africa | 0 | - | 4.99 | 110,538 |
| Mexico Country Quiz | 0 | - | 4.48 | 66,856 |
| All First-Level Subdivisions of South America on a Map | 0 | - | 4.91 | 40,806 |
| Brazil States Map Quiz | 0 | - | 4.83 | 40,190 |
| States of Brazil | 0 | - | 4.97 | 69,833 |
| Fictional Characters from the Midwest by Picture | 0 | - | 4.04 | 18,468 |
| U.S. States by Picture #1 | 0 | - | 4.17 | 14,411 |
| U.S. Cities with the Highest Murder Rate | 0 | - | 4.58 | 131,043 |
| Most-Visited U.S. Cities | 0 | - | 4.87 | 73,835 |
| Every U.S. Metro Area on a Map | 0 | - | 4.97 | 63,661 |
| All U.S. Supreme Court Justices Ever | 0 | - | 4.33 | 10,403 |
| Geography of California | 0 | - | 4.23 | 9,708 |
| California Pro Sport Teams | 0 | - | 4.25 | 22,149 |
| Chicago City Trivia | 0 | - | 4.26 | 30,455 |
| New York Pro Sport Teams | 0 | - | 4.30 | 24,672 |
| Countries Larger Than Texas but With Fewer People | 0 | - | 4.85 | 22,107 |
| Texas Pro Sport Teams | 0 | - | 4.13 | 16,260 |
| History of Pennsylvania | 0 | - | 4.09 | 6,476 |
| History of Virginia | 0 | - | 4.33 | 10,969 |
| Washington State by Picture | 0 | - | 4.18 | 7,173 |
| Events in U.S. History | 0 | - | 4.38 | 26,271 |
| Events by U.S. State #1 | 0 | - | 4.42 | 21,847 |
| States and Provinces that touch the Rocky Mountains | 0 | - | 4.42 | 31,499 |
| Most Valuable Crops by U.S. State | 0 | - | 4.38 | 36,938 |
| U.S. States with the Most Venomous Snake Species | 0 | - | 4.47 | 25,137 |
| U.S. States with the Most Endangered Species | 0 | - | 4.50 | 13,888 |
| African-American Historical Figures | 0 | - | 4.14 | 16,433 |
| Capitals of Canadian Provinces | 0 | - | 4.86 | 74,040 |
| Most-Visited Countries by Canadians | 0 | - | 4.79 | 37,981 |
| Top 10 Coldest European Countries | 0 | - | 4.95 | 182,039 |
| Top 10 Hottest European Countries | 0 | - | 4.87 | 116,334 |
| Top 10 Biggest Economies in Europe | 0 | - | 4.98 | 180,504 |
| Category Elimination - European Geography #1 | 0 | - | 4.97 | 203,092 |
