| US States Quiz | 0 | - | 5.00 | 16,696,279 |
| Name the U.S. National Parks | 0 | - | 4.86 | 58,831 |
| Total United States Immigration by Country | 0 | - | 4.91 | 110,639 |
| Most Common U.S. Last Names - Extreme | 0 | - | 4.94 | 173,123 |
| "Do Not Travel" Countries for U.S. Citizens | 0 | - | 4.97 | 240,835 |
| U.S. Cabinet Departments | 0 | - | 4.86 | 72,509 |
| Top 10 Non-English Languages Spoken in New York City | 0 | - | 4.84 | 65,609 |
| States of the U.S. in Alphabetical Order | 0 | - | 4.98 | 365,223 |
| All 3,143 Counties of the United States on a Map | 0 | - | 4.97 | 327,880 |
| 10 Closest Megacities to New York City | 0 | - | 4.52 | 67,194 |
| Pixelated United States Map | 0 | - | 4.89 | 93,455 |
| Most-Visited Countries by Americans | 0 | - | 4.87 | 108,439 |
| Countries that Visit the United States the Most | 0 | - | 4.96 | 90,828 |
| Deadliest U.S. Wars | 0 | - | 4.89 | 189,221 |
| The 13 Colonies Quiz | 0 | - | 4.97 | 116,702 |
| U.S. States with the Letter Y | 0 | - | 4.85 | 110,333 |
| 10 Southernmost U.S. States | 0 | - | 4.88 | 112,381 |
| U.S. States with Short Names | 0 | - | 4.91 | 147,629 |
| U.S. States that Start with M | 0 | - | 4.93 | 185,878 |
| U.S. States By Population | 0 | - | 4.92 | 152,334 |
| U.S. States that Start with N | 0 | - | 4.95 | 170,374 |
| U.S. States with Longest Names | 0 | - | 4.84 | 43,847 |
| U.S. States with a Unique First Letter | 0 | - | 4.96 | 87,534 |
| 10 Westernmost U.S. States | 0 | - | 4.95 | 63,755 |
| The Only Remaining U.S. State . . . | 0 | - | 4.92 | 64,866 |
| US States with an Empty Map | 0 | - | 5.00 | 618,664 |
| 10 Longest Rivers in the United States | 0 | - | 4.85 | 38,797 |
| Countries Closest to United States by Continent | 0 | - | 4.99 | 145,386 |
| Countries that Beat the United States | 0 | - | 4.93 | 165,537 |
| Louisiana Purchase with a Map | 0 | - | 4.96 | 47,551 |
| Top 10 Most-Visited U.S. States | 0 | - | 4.90 | 101,073 |
| U.S. States with the Most Immigrants | 0 | - | 4.85 | 81,924 |
| U.S. States or European Countries by Area | 0 | - | 4.94 | 94,681 |
| U.S. States or European Countries by Population | 0 | - | 4.97 | 131,899 |
| Name a Valid U.S. State #1 | 0 | - | 4.93 | 206,640 |
| Top 10 Coldest U.S. States | 0 | - | 4.94 | 123,845 |
| Top 10 Hottest U.S. States | 0 | - | 4.86 | 124,633 |
| Top 10 Most Native American U.S. States | 0 | - | 4.87 | 91,028 |
| Top 10 U.S. States with the Least Precipitation | 0 | - | 4.82 | 61,537 |
| Who Did that Motown Song? | 0 | - | 4.48 | 13,019 |
| States of Mexico | 0 | - | 4.95 | 173,300 |
| Mexico States Map Quiz | 0 | - | 4.84 | 103,766 |
| U.S. State Nicknames Quiz | 0 | - | 4.47 | 50,258 |
| Countries with American Expatriates | 0 | - | 4.53 | 42,473 |
| United States Landmarks Map Quiz | 0 | - | 4.55 | 40,074 |
| United States Country Quiz | 0 | - | 4.43 | 100,561 |
| Busiest Air Routes from the U.S. | 0 | - | 4.46 | 76,596 |
| Famous People from California by Picture | 0 | - | 4.32 | 36,129 |
| California Groups of Things | 0 | - | 4.25 | 45,265 |
| Los Angeles vs. New York | 0 | - | 4.41 | 19,636 |
| Hawaiian Islands Map Quiz | 0 | - | 4.78 | 22,202 |
| Famous People from New York by Picture | 0 | - | 4.03 | 27,349 |
| New York Groups of Things | 0 | - | 4.38 | 59,937 |
| Countries Closest to Canada | 0 | - | 4.90 | 197,335 |
| Asian Countries Americans Travel to the Most | 0 | - | 4.75 | 59,646 |
| U.S. Geography by Letter - B | 0 | - | 4.53 | 68,530 |
| U.S. Geography by Letter - S | 0 | - | 4.54 | 52,072 |
| Two Letter U.S. State Abbreviations | 0 | - | 4.19 | 743,091 |
| Countries Closest to the U. S. | 0 | - | 4.41 | 207,821 |
| U.S. Federal Agency Acronyms | 0 | - | 4.50 | 79,732 |
| Top 10 Non-English Languages of Los Angeles | 0 | - | 4.42 | 59,583 |
| Musical Acts from Los Angeles by Two Songs | 0 | - | 4.27 | 15,824 |
| Musical Acts from New York City | 0 | - | 3.82 | 10,100 |
| New England States | 0 | - | 4.51 | 59,706 |
| U.S. States by Land Area | 0 | - | 4.61 | 52,471 |
| Top 10 U.S. States by Inland Water Area | 0 | - | 4.53 | 37,882 |
| Add a Letter - Make a U.S. State | 0 | - | 4.72 | 82,303 |
| Top 10 Widest U.S. States East to West | 0 | - | 4.69 | 55,629 |
| Top 10 Tallest U.S. States North to South | 0 | - | 4.74 | 40,656 |
| U.S. States by Borders | 0 | - | 4.63 | 35,066 |
| 10 Easternmost U.S. States | 0 | - | 4.53 | 56,231 |
| The Only U.S. State ... #1 | 0 | - | 4.52 | 101,127 |
| 50 States, 50 Cities - Hard Version | 0 | - | 4.46 | 43,983 |
| Countries that Beat Canada | 0 | - | 4.90 | 86,841 |
| Asian Last Names in the United States | 0 | - | 4.43 | 46,501 |
| United States Map Quiz | 0 | - | 4.98 | 4,141,365 |
| Countries Closest to Alaska | 0 | - | 4.93 | 123,291 |
| Geography of California | 0 | - | 4.25 | 10,498 |
| Countries Closest to Maine | 0 | - | 4.84 | 66,424 |
| Boroughs of New York City | 0 | - | 4.47 | 84,086 |
| New York Pro Sport Teams | 0 | - | 4.32 | 25,800 |
| U.S. License Plates Picture Quiz | 0 | - | 4.59 | 52,658 |
| U.S. States with the Fewest Immigrants | 0 | - | 4.63 | 65,397 |
| U.S. States with the Highest Percentage of Farmland | 0 | - | 4.80 | 65,271 |
| U.S. States with the Lowest Percentage of Farmland | 0 | - | 4.74 | 55,027 |
| Walking Across U.S. State Borders with Hints | 0 | - | 4.74 | 34,926 |
| U.S. States with the Longest International Borders | 0 | - | 4.78 | 45,569 |
| Longest U.S. State Borders | 0 | - | 4.67 | 39,372 |
| Top 10 U.S. States with the Highest Elevation | 0 | - | 4.51 | 67,764 |
| U.S. States with the Lowest Average Elevation | 0 | - | 4.55 | 38,386 |
| U.S. States With the Highest Average Elevation | 0 | - | 4.61 | 32,663 |
| U.S. States with the Fewest Borders | 0 | - | 4.77 | 113,018 |
| U.S. States with the Most Borders | 0 | - | 4.53 | 62,225 |
| Flags of North and South America | 0 | - | 4.99 | 366,962 |
| Belize Country Quiz | 0 | - | 4.85 | 20,801 |
| Top U.S. Universities | 0 | - | 4.15 | 144,035 |
| Largest United States Airlines | 0 | - | 4.39 | 54,833 |
| Third Most Common Language by U.S. State | 0 | - | 4.89 | 113,372 |
| U.S. States by Governor | 0 | - | 4.43 | 17,981 |
| U.S. Political Parties in History | 0 | - | 4.44 | 27,570 |
| U.S. Government Agencies | 0 | - | 4.44 | 19,545 |
| America the Beautiful Lyrics | 0 | - | 4.27 | 19,715 |
| Famous People from Alabama by Picture | 0 | - | 4.07 | 23,950 |
| Florida Pro Sport Teams | 0 | - | 4.61 | 11,751 |
| Hawaiian Islands | 0 | - | 4.83 | 42,424 |
| Famous People from Michigan by Picture | 0 | - | 4.30 | 21,291 |
| Famous People from Texas by Picture | 0 | - | 3.99 | 33,257 |
| U.S. States that Border Tennessee | 0 | - | 4.83 | 65,083 |
| Georgia ... or Georgia? | 0 | - | 4.69 | 76,406 |
| U.S. Geography by Letter - C | 0 | - | 4.26 | 73,340 |
| U.S. Geography by Letter - A | 0 | - | 4.38 | 62,311 |
| U.S. Geography by Letter - D | 0 | - | 4.08 | 56,305 |
| U.S. Geography by Letter - T | 0 | - | 4.27 | 48,990 |
| U.S. Geography by Letter - P | 0 | - | 4.34 | 47,380 |
| U.S. Geography by Letter - M | 0 | - | 4.13 | 52,590 |
| U.S. Geography by Letter - L | 0 | - | 4.03 | 40,354 |
| U.S. Geography by Letter - G | 0 | - | 4.12 | 38,597 |
| U.S. Geography By Letter - H | 0 | - | 4.35 | 39,325 |
| American Legal Vocabulary | 0 | - | 4.40 | 33,788 |
| U.S. Cities by Picture #1 | 0 | - | 4.37 | 34,351 |
| Cities by Picture #2 | 0 | - | 4.19 | 34,932 |
| 10 U.S. States With The Lowest Murder Rates | 0 | - | 4.51 | 39,281 |
| Biggest Trading Partners - United States | 0 | - | 4.63 | 106,337 |
| The U.S. Government - How Does it Work? | 0 | - | 4.34 | 42,156 |
| American Founding Fathers | 0 | - | 4.41 | 23,071 |
| Movies Set in San Francisco | 0 | - | 4.23 | 19,907 |
| Movies Set in Miami | 0 | - | 4.32 | 16,672 |
| Boston Talk to English Translation Quiz | 0 | - | 4.59 | 55,685 |
| State Quiz - New York | 0 | - | 4.52 | 45,731 |
| People on Money - United States | 0 | - | 4.31 | 63,203 |
| U.S. History Groups of Two | 0 | - | 4.23 | 44,237 |
| 100 Most Influential Figures in U.S. History | 0 | - | 4.20 | 44,726 |
| Last 10 U.S. States Alphabetically | 0 | - | 4.35 | 74,599 |
| Top 10 Least Populous U.S. State Capitals | 0 | - | 4.52 | 21,461 |
| 10 U.S. States With The Highest Murder Rates | 0 | - | 4.46 | 51,669 |
| Flyover States | 0 | - | 4.52 | 29,390 |
| U.S. States With Double Letters | 0 | - | 4.54 | 23,911 |
| U.S. States Bigger than Their Neighbors | 0 | - | 4.27 | 75,798 |
| U.S. States by Wikipedia Descriptions #1 | 0 | - | 4.57 | 39,190 |
| U.S. States by Wikipedia Descriptions #2 | 0 | - | 4.47 | 36,975 |
| States and Provinces that touch the Rocky Mountains | 0 | - | 4.42 | 32,411 |
| Name a Valid U.S. State #2 | 0 | - | 4.63 | 76,462 |
| Name a Valid U.S. State #3 | 0 | - | 4.78 | 48,681 |
| U.S. State Superlatives #1 | 0 | - | 4.47 | 87,263 |
| U.S. State Superlatives #2 | 0 | - | 4.53 | 40,470 |
| 50 States, 50 Cities - Easy Version | 0 | - | 4.39 | 127,984 |
| Top 10 U.S. States With the Most Tornadoes | 0 | - | 4.53 | 64,412 |
| Top 10 Richest U.S. States by Median Income | 0 | - | 4.47 | 118,554 |
| Top 10 Least Religious U.S. States | 0 | - | 4.51 | 34,078 |
| Top 10 Least-Forested U.S. States | 0 | - | 4.50 | 46,307 |
| Top 10 U.S. States by Public Transit | 0 | - | 4.77 | 63,395 |
| Top 10 U.S. States with the Most Precipitation | 0 | - | 4.46 | 41,561 |
| The Only American Country ... | 0 | - | 4.92 | 120,734 |
| American Countries with the Shortest Names | 0 | - | 4.96 | 120,320 |
| U.S. State Border Crossings | 0 | - | 4.97 | 95,942 |
| U.S. Citizenship Test Questions | 0 | - | 4.83 | 238,297 |
| U.S. Cities with the Most International Tourists | 0 | - | 4.88 | 74,851 |
| Cities and Towns of Massachusetts | 0 | - | 4.92 | 73,042 |
| Countries Larger Than Texas but With Fewer People | 0 | - | 4.92 | 39,479 |
| Regions of U.S. States | 0 | - | 4.37 | 43,461 |
| States, Provinces & Territories that Touch the Appalachian Mountains | 0 | - | 4.59 | 20,339 |
| 10 U.S. States with the Most Valuable Crops | 0 | - | 4.41 | 29,493 |
| U.S. States with the Lowest HDI | 0 | - | 4.46 | 28,762 |
| Which U.S. State - Multiple Choice | 0 | - | 4.48 | 20,195 |
| Movies by State | 0 | - | 4.27 | 40,440 |
| Canada Country Quiz | 0 | - | 4.54 | 131,691 |
| Canada Cities Map Quiz | 0 | - | 4.63 | 123,594 |
| Canada A-Z | 0 | - | 4.73 | 32,645 |
| Top 10 Biggest Economies in the Americas | 0 | - | 4.94 | 91,065 |
| Mexico Country Quiz | 0 | - | 4.49 | 71,966 |
| Mexico Cities Map Quiz | 0 | - | 4.77 | 33,313 |
| All First-Level Subdivisions of South America on a Map | 0 | - | 4.92 | 52,934 |
| Brazil States Map Quiz | 0 | - | 4.85 | 47,375 |
| States of Brazil | 0 | - | 4.98 | 86,355 |
| Fictional Characters from the Midwest by Picture | 0 | - | 4.04 | 19,156 |
| U.S. States by Picture #1 | 0 | - | 4.21 | 15,356 |
| Most-Visited U.S. Cities | 0 | - | 4.85 | 92,322 |
| Every U.S. Metro Area on a Map | 0 | - | 4.97 | 80,718 |
| Senators Who Ran For President | 0 | - | 4.24 | 16,993 |
| U.S. Electoral College Landslides | 0 | - | 4.35 | 21,969 |
| California Pro Sport Teams | 0 | - | 4.19 | 22,649 |
| Chicago City Trivia | 0 | - | 4.31 | 31,378 |
| Texas Pro Sport Teams | 0 | - | 4.19 | 16,775 |
| History of Pennsylvania | 0 | - | 4.16 | 7,087 |
| History of Virginia | 0 | - | 4.31 | 11,555 |
| Washington State by Picture | 0 | - | 4.26 | 7,682 |
| Events in U.S. History | 0 | - | 4.40 | 28,474 |
| Events by U.S. State #1 | 0 | - | 4.43 | 22,829 |
| Most Valuable Crops by U.S. State | 0 | - | 4.40 | 38,922 |
| 10 U.S. States with the Highest Tax Burden | 0 | - | 4.26 | 38,012 |
| Top 10 U.S. States by Manufacturing Employment | 0 | - | 4.49 | 28,730 |
| U.S. States with the Most Venomous Snake Species | 0 | - | 4.47 | 26,307 |
| U.S. States with the Most Endangered Species | 0 | - | 4.50 | 14,327 |
| African-American Historical Figures | 0 | - | 4.18 | 17,124 |
| Canadian Prime Ministers | 0 | - | 4.63 | 57,033 |
| Capitals of Canadian Provinces | 0 | - | 4.85 | 88,382 |
| Most-Visited Countries by Canadians | 0 | - | 4.77 | 39,115 |
| U.S. States With No City Over 100,000 | 0 | - | 4.57 | 17,813 |
| Canada or Africa by Area | 0 | - | 4.77 | 18,059 |
| Top 10 American Countries by Coastline | 0 | - | 4.96 | 88,067 |
