| Asian Last Names in the United States | 0 | - | 4.43 | 46,561 |
| Countries that Beat the United States | 0 | - | 4.93 | 165,814 |
| U.S. State Nicknames Quiz | 0 | - | 4.47 | 50,338 |
| US States Quiz | 0 | - | 5.00 | 16,733,894 |
| Name the U.S. National Parks | 0 | - | 4.86 | 59,340 |
| Total United States Immigration by Country | 0 | - | 4.91 | 110,807 |
| "Do Not Travel" Countries for U.S. Citizens | 0 | - | 4.97 | 241,467 |
| U.S. Cabinet Departments | 0 | - | 4.86 | 72,583 |
| Top 10 Non-English Languages Spoken in New York City | 0 | - | 4.84 | 65,743 |
| States of the U.S. in Alphabetical Order | 0 | - | 4.98 | 365,590 |
| All 3,143 Counties of the United States on a Map | 0 | - | 4.97 | 328,819 |
| Pixelated United States Map | 0 | - | 4.89 | 93,637 |
| Most-Visited Countries by Americans | 0 | - | 4.87 | 108,689 |
| Countries that Visit the United States the Most | 0 | - | 4.96 | 91,003 |
| Deadliest U.S. Wars | 0 | - | 4.89 | 189,475 |
| The 13 Colonies Quiz | 0 | - | 4.97 | 116,937 |
| U.S. States with the Letter Y | 0 | - | 4.85 | 110,550 |
| 10 Southernmost U.S. States | 0 | - | 4.88 | 112,596 |
| U.S. States with Short Names | 0 | - | 4.91 | 147,899 |
| U.S. States that Start with M | 0 | - | 4.93 | 186,151 |
| U.S. States By Population | 0 | - | 4.92 | 152,528 |
| U.S. States that Start with N | 0 | - | 4.95 | 170,595 |
| U.S. States with Longest Names | 0 | - | 4.84 | 43,984 |
| U.S. States with a Unique First Letter | 0 | - | 4.96 | 87,720 |
| 10 Westernmost U.S. States | 0 | - | 4.95 | 63,838 |
| The Only Remaining U.S. State . . . | 0 | - | 4.92 | 65,009 |
| US States with an Empty Map | 0 | - | 5.00 | 619,877 |
| 10 Longest Rivers in the United States | 0 | - | 4.85 | 38,861 |
| Countries Closest to United States by Continent | 0 | - | 4.99 | 145,596 |
| Louisiana Purchase with a Map | 0 | - | 4.96 | 47,774 |
| Top 10 Most-Visited U.S. States | 0 | - | 4.90 | 101,203 |
| U.S. States with the Most Immigrants | 0 | - | 4.85 | 82,035 |
| Countries that Beat Canada | 0 | - | 4.90 | 86,970 |
| U.S. States or European Countries by Area | 0 | - | 4.95 | 94,972 |
| U.S. States or European Countries by Population | 0 | - | 4.97 | 132,172 |
| Name a Valid U.S. State #1 | 0 | - | 4.93 | 207,089 |
| Top 10 Coldest U.S. States | 0 | - | 4.94 | 124,038 |
| Top 10 Hottest U.S. States | 0 | - | 4.86 | 124,852 |
| Top 10 Most Native American U.S. States | 0 | - | 4.87 | 91,260 |
| Top 10 U.S. States with the Least Precipitation | 0 | - | 4.82 | 61,615 |
| American Countries with the Shortest Names | 0 | - | 4.96 | 120,460 |
| Hispanic Last Names in the U.S. | 0 | - | 4.31 | 54,633 |
| States of Mexico | 0 | - | 4.95 | 173,857 |
| Mexico States Map Quiz | 0 | - | 4.84 | 103,986 |
| Countries with American Expatriates | 0 | - | 4.53 | 42,494 |
| United States Landmarks Map Quiz | 0 | - | 4.55 | 40,099 |
| United States Country Quiz | 0 | - | 4.43 | 100,782 |
| Busiest Air Routes from the U.S. | 0 | - | 4.46 | 76,665 |
| California Groups of Things | 0 | - | 4.25 | 45,301 |
| New York Groups of Things | 0 | - | 4.38 | 59,975 |
| U.S. History Groups of Two | 0 | - | 4.23 | 44,285 |
| Countries Closest to Canada | 0 | - | 4.90 | 197,519 |
| Asian Countries Americans Travel to the Most | 0 | - | 4.75 | 59,712 |
| U.S. Geography by Letter - B | 0 | - | 4.53 | 68,874 |
| U.S. Geography by Letter - S | 0 | - | 4.55 | 52,374 |
| Two Letter U.S. State Abbreviations | 0 | - | 4.19 | 743,889 |
| Countries Closest to the U. S. | 0 | - | 4.41 | 208,117 |
| U.S. Federal Agency Acronyms | 0 | - | 4.50 | 79,783 |
| Top 10 Non-English Languages of Los Angeles | 0 | - | 4.42 | 59,653 |
| 10 Closest Megacities to New York City | 0 | - | 4.52 | 67,215 |
| Last Names in U.S. History #1 | 0 | - | 4.25 | 36,106 |
| New England States | 0 | - | 4.51 | 59,722 |
| U.S. States by Land Area | 0 | - | 4.61 | 52,540 |
| Top 10 U.S. States by Inland Water Area | 0 | - | 4.53 | 37,905 |
| Add a Letter - Make a U.S. State | 0 | - | 4.72 | 82,425 |
| Top 10 Widest U.S. States East to West | 0 | - | 4.69 | 55,714 |
| Top 10 Tallest U.S. States North to South | 0 | - | 4.74 | 40,708 |
| U.S. States by Borders | 0 | - | 4.63 | 35,123 |
| 10 Easternmost U.S. States | 0 | - | 4.53 | 56,277 |
| The Only U.S. State ... #1 | 0 | - | 4.52 | 101,198 |
| Movies by State | 0 | - | 4.27 | 40,459 |
| 50 States, 50 Cities - Hard Version | 0 | - | 4.46 | 44,036 |
| United States Map Quiz | 0 | - | 4.98 | 4,144,704 |
| U.S. License Plates Picture Quiz | 0 | - | 4.59 | 52,704 |
| U.S. States with the Fewest Immigrants | 0 | - | 4.63 | 65,493 |
| U.S. States with the Highest Percentage of Farmland | 0 | - | 4.80 | 65,314 |
| U.S. States with the Lowest Percentage of Farmland | 0 | - | 4.74 | 55,060 |
| Walking Across U.S. State Borders with Hints | 0 | - | 4.74 | 34,950 |
| U.S. States with the Longest International Borders | 0 | - | 4.78 | 45,632 |
| Longest U.S. State Borders | 0 | - | 4.67 | 39,467 |
| Most Valuable Crops by U.S. State | 0 | - | 4.40 | 38,954 |
| Top 10 U.S. States with the Highest Elevation | 0 | - | 4.51 | 67,793 |
| U.S. States with the Lowest Average Elevation | 0 | - | 4.55 | 38,411 |
| U.S. States With the Highest Average Elevation | 0 | - | 4.61 | 32,682 |
| U.S. States with the Fewest Borders | 0 | - | 4.77 | 113,134 |
| U.S. States with the Most Borders | 0 | - | 4.53 | 62,240 |
| Last Names by Country of Origin | 0 | - | 4.63 | 156,014 |
| Flags of North and South America | 0 | - | 4.99 | 368,579 |
| Belize Country Quiz | 0 | - | 4.85 | 20,837 |
| Top U.S. Universities | 0 | - | 4.15 | 144,258 |
| Largest United States Airlines | 0 | - | 4.39 | 54,875 |
| Third Most Common Language by U.S. State | 0 | - | 4.87 | 113,437 |
| U.S. States by Governor | 0 | - | 4.43 | 17,995 |
| U.S. Political Parties in History | 0 | - | 4.44 | 27,593 |
| U.S. Government Agencies | 0 | - | 4.44 | 19,569 |
| Florida Pro Sport Teams | 0 | - | 4.61 | 11,768 |
| Countries of Europe - One Minute Sprint | 0 | - | 4.94 | 1,321,411 |
| Most Common Surnames in the UK | 0 | - | 4.21 | 69,495 |
| Georgia ... or Georgia? | 0 | - | 4.69 | 76,497 |
| U.S. Geography by Letter - C | 0 | - | 4.27 | 73,642 |
| U.S. Geography by Letter - A | 0 | - | 4.38 | 62,607 |
| U.S. Geography by Letter - D | 0 | - | 4.08 | 56,595 |
| U.S. Geography by Letter - T | 0 | - | 4.29 | 49,274 |
| U.S. Geography by Letter - P | 0 | - | 4.36 | 47,694 |
| U.S. Geography by Letter - M | 0 | - | 4.14 | 52,879 |
| U.S. Geography by Letter - L | 0 | - | 4.04 | 40,707 |
| U.S. Geography by Letter - G | 0 | - | 4.13 | 38,842 |
| U.S. Geography By Letter - H | 0 | - | 4.35 | 39,605 |
| Names of Generations | 0 | - | 4.01 | 22,701 |
| American Legal Vocabulary | 0 | - | 4.40 | 33,810 |
| U.S. Cities by Picture #1 | 0 | - | 4.37 | 34,390 |
| Cities by Picture #2 | 0 | - | 4.19 | 34,975 |
| 10 U.S. States With The Lowest Murder Rates | 0 | - | 4.50 | 41,011 |
| Biggest Trading Partners - United States | 0 | - | 4.63 | 106,416 |
| The U.S. Government - How Does it Work? | 0 | - | 4.34 | 42,204 |
| American Founding Fathers | 0 | - | 4.41 | 23,085 |
| Famous People from California by Picture | 0 | - | 4.32 | 36,196 |
| Hawaiian Islands Map Quiz | 0 | - | 4.78 | 22,214 |
| People on Money - United States | 0 | - | 4.31 | 63,231 |
| 100 Most Influential Figures in U.S. History | 0 | - | 4.20 | 44,762 |
| Last Names in U.S. History #2 | 0 | - | 4.39 | 17,520 |
| Last 10 U.S. States Alphabetically | 0 | - | 4.35 | 74,647 |
| Top 10 Least Populous U.S. State Capitals | 0 | - | 4.52 | 21,474 |
| 10 U.S. States With The Highest Murder Rates | 0 | - | 4.46 | 53,175 |
| Flyover States | 0 | - | 4.52 | 29,421 |
| U.S. States With Double Letters | 0 | - | 4.54 | 23,959 |
| U.S. States Bigger than Their Neighbors | 0 | - | 4.27 | 75,879 |
| U.S. States by Wikipedia Descriptions #1 | 0 | - | 4.57 | 39,230 |
| U.S. States by Wikipedia Descriptions #2 | 0 | - | 4.47 | 36,994 |
| States and Provinces that touch the Rocky Mountains | 0 | - | 4.42 | 32,430 |
| Name a Valid U.S. State #2 | 0 | - | 4.63 | 76,570 |
| Name a Valid U.S. State #3 | 0 | - | 4.78 | 48,764 |
| U.S. State Superlatives #1 | 0 | - | 4.47 | 87,320 |
| U.S. State Superlatives #2 | 0 | - | 4.53 | 40,506 |
| Musical Acts by State | 0 | - | 4.05 | 19,560 |
| 50 States, 50 Cities - Easy Version | 0 | - | 4.39 | 128,066 |
| Top 10 U.S. States With the Most Tornadoes | 0 | - | 4.53 | 64,507 |
| Top 10 Richest U.S. States by Median Income | 0 | - | 4.47 | 118,615 |
| Top 10 Least Religious U.S. States | 0 | - | 4.51 | 34,127 |
| Top 10 Least-Forested U.S. States | 0 | - | 4.50 | 46,356 |
| Top 10 U.S. States by Public Transit | 0 | - | 4.77 | 63,474 |
| Top 10 U.S. States with the Most Precipitation | 0 | - | 4.46 | 41,598 |
| Famous Italian-Americans | 0 | - | 4.15 | 14,348 |
| Most Common Last Names in Sweden | 0 | - | 4.49 | 15,296 |
| NFL Football Last Names | 0 | - | 4.43 | 170,681 |
| Africa Geography Quiz #1 | 0 | - | 4.93 | 49,043 |
| The Only American Country ... | 0 | - | 4.92 | 120,907 |
| U.S. State Border Crossings | 0 | - | 4.97 | 96,053 |
| U.S. Citizenship Test Questions | 0 | - | 4.83 | 238,519 |
| U.S. Cities with the Most International Tourists | 0 | - | 4.88 | 74,998 |
| Cities and Towns of Massachusetts | 0 | - | 4.92 | 73,200 |
| Who Did that Motown Song? | 0 | - | 4.48 | 13,025 |
| Countries Larger Than Texas but With Fewer People | 0 | - | 4.92 | 39,591 |
| Regions of U.S. States | 0 | - | 4.37 | 43,545 |
| States, Provinces & Territories that Touch the Appalachian Mountains | 0 | - | 4.59 | 20,348 |
| 10 U.S. States with the Most Valuable Crops | 0 | - | 4.41 | 29,507 |
| U.S. States with the Lowest HDI | 0 | - | 4.46 | 28,786 |
| Which U.S. State - Multiple Choice | 0 | - | 4.48 | 20,221 |
| People by U.S. State - Multiple Choice | 0 | - | 4.06 | 9,804 |
| Canada Country Quiz | 0 | - | 4.55 | 131,883 |
| Canada Cities Map Quiz | 0 | - | 4.63 | 123,731 |
| Canada A-Z | 0 | - | 4.73 | 32,684 |
| Asian Countries with the Shortest Names | 0 | - | 4.97 | 134,529 |
| Divided World City Name Puzzle #1 | 0 | - | 4.88 | 48,199 |
| Countries by Initial Letter and Continent #3 | 0 | - | 4.93 | 47,933 |
| Countries by Initial Letter and Continent #2 | 0 | - | 4.91 | 95,766 |
| Category Elimination - African Geography #1 | 0 | - | 4.90 | 91,258 |
| Name a Valid African Country | 0 | - | 4.98 | 153,131 |
| Top 10 Biggest Economies in the Americas | 0 | - | 4.93 | 91,208 |
| Mexico Country Quiz | 0 | - | 4.49 | 72,076 |
| Mexico Cities Map Quiz | 0 | - | 4.77 | 33,331 |
| South American Geography Quiz #2 | 0 | - | 4.61 | 39,225 |
| South American Geography Quiz #1 | 0 | - | 4.73 | 32,492 |
| All First-Level Subdivisions of South America on a Map | 0 | - | 4.92 | 53,150 |
| Brazil States Map Quiz | 0 | - | 4.85 | 47,509 |
| States of Brazil | 0 | - | 4.98 | 86,699 |
| Fictional Characters from the Midwest by Picture | 0 | - | 4.04 | 19,163 |
| U.S. States by Picture #1 | 0 | - | 4.21 | 15,372 |
| Random U.S. City to State | 0 | - | 4.45 | 75,476 |
| Most-Visited U.S. Cities | 0 | - | 4.85 | 92,645 |
| Every U.S. Metro Area on a Map | 0 | - | 4.97 | 80,975 |
| Senators Who Ran For President | 0 | - | 4.24 | 16,997 |
| U.S. Electoral College Landslides | 0 | - | 4.35 | 21,997 |
| Geography of California | 0 | - | 4.25 | 10,511 |
| California Pro Sport Teams | 0 | - | 4.19 | 22,655 |
| Chicago City Trivia | 0 | - | 4.31 | 31,398 |
| New York Pro Sport Teams | 0 | - | 4.32 | 25,817 |
| Texas Pro Sport Teams | 0 | - | 4.19 | 16,788 |
| History of Pennsylvania | 0 | - | 4.16 | 7,096 |
| History of Virginia | 0 | - | 4.31 | 11,563 |
| Washington State by Picture | 0 | - | 4.26 | 7,689 |
| Events in U.S. History | 0 | - | 4.40 | 28,515 |
| Events by U.S. State #1 | 0 | - | 4.43 | 22,846 |
| 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 | 28,755 |
| U.S. States with the Most Venomous Snake Species | 0 | - | 4.47 | 26,332 |
| U.S. States with the Most Endangered Species | 0 | - | 4.50 | 14,332 |
| African-American Historical Figures | 0 | - | 4.18 | 17,139 |
| Canadian Prime Ministers | 0 | - | 4.63 | 57,166 |
| Capitals of Canadian Provinces | 0 | - | 4.85 | 88,551 |
