| Pixelated United States Map | 0 | - | 4.87 | 94,067 |
| US States Quiz | 0 | - | 5.00 | 16,830,703 |
| Name the U.S. National Parks | 0 | - | 4.86 | 59,784 |
| Total United States Immigration by Country | 0 | - | 4.91 | 111,315 |
| Most Common U.S. Last Names - Extreme | 0 | - | 4.94 | 174,183 |
| "Do Not Travel" Countries for U.S. Citizens | 0 | - | 4.97 | 243,196 |
| U.S. Cabinet Departments | 0 | - | 4.86 | 72,797 |
| Top 10 Non-English Languages Spoken in New York City | 0 | - | 4.85 | 66,073 |
| States of the U.S. in Alphabetical Order | 0 | - | 4.98 | 366,579 |
| All 3,143 Counties of the United States on a Map | 0 | - | 4.97 | 331,048 |
| 10 Closest Megacities to New York City | 0 | - | 4.52 | 67,296 |
| Most-Visited Countries by Americans | 0 | - | 4.87 | 109,339 |
| Countries that Visit the United States the Most | 0 | - | 4.96 | 91,507 |
| Deadliest U.S. Wars | 0 | - | 4.89 | 190,505 |
| The 13 Colonies Quiz | 0 | - | 4.97 | 117,635 |
| U.S. States with the Letter Y | 0 | - | 4.85 | 111,159 |
| 10 Southernmost U.S. States | 0 | - | 4.88 | 113,199 |
| U.S. States with Short Names | 0 | - | 4.91 | 148,685 |
| U.S. States that Start with M | 0 | - | 4.93 | 186,957 |
| U.S. States By Population | 0 | - | 4.92 | 152,999 |
| U.S. States that Start with N | 0 | - | 4.95 | 171,184 |
| U.S. States with Longest Names | 0 | - | 4.84 | 44,313 |
| U.S. States with a Unique First Letter | 0 | - | 4.96 | 88,121 |
| 10 Westernmost U.S. States | 0 | - | 4.95 | 64,100 |
| The Only Remaining U.S. State . . . | 0 | - | 4.93 | 65,457 |
| US States with an Empty Map | 0 | - | 5.00 | 623,231 |
| Flags of North and South America | 0 | - | 4.99 | 371,865 |
| 10 Longest Rivers in the United States | 0 | - | 4.85 | 39,100 |
| Countries Closest to United States by Continent | 0 | - | 4.99 | 146,133 |
| Countries that Beat the United States | 0 | - | 4.93 | 166,534 |
| Louisiana Purchase with a Map | 0 | - | 4.96 | 48,378 |
| Top 10 Most-Visited U.S. States | 0 | - | 4.90 | 101,595 |
| U.S. States with the Most Immigrants | 0 | - | 4.85 | 82,335 |
| U.S. States or European Countries by Area | 0 | - | 4.95 | 95,719 |
| U.S. States or European Countries by Population | 0 | - | 4.97 | 132,887 |
| Name a Valid U.S. State #1 | 0 | - | 4.93 | 208,419 |
| Top 10 Coldest U.S. States | 0 | - | 4.94 | 124,477 |
| Top 10 Hottest U.S. States | 0 | - | 4.86 | 125,392 |
| Top 10 Most Native American U.S. States | 0 | - | 4.87 | 91,795 |
| Top 10 U.S. States with the Least Precipitation | 0 | - | 4.82 | 61,833 |
| States of Mexico | 0 | - | 4.95 | 175,485 |
| Mexico States Map Quiz | 0 | - | 4.85 | 104,448 |
| Midwestern States of the U.S. | 0 | - | 4.88 | 13,629 |
| Mexico Cities Map Quiz | 0 | - | 4.83 | 38,312 |
| U.S. State Nicknames | 0 | - | 4.47 | 50,460 |
| Countries with American Expatriates | 0 | - | 4.53 | 42,554 |
| United States Landmarks Map Quiz | 0 | - | 4.55 | 40,159 |
| U.S. Cities by Picture #1 | 0 | - | 4.36 | 34,504 |
| Cities by Picture #2 | 0 | - | 4.19 | 35,081 |
| United States Country Quiz | 0 | - | 4.43 | 101,305 |
| Busiest Air Routes from the U.S. | 0 | - | 4.46 | 76,820 |
| Famous People from California by Picture | 0 | - | 4.32 | 36,371 |
| California Groups of Things | 0 | - | 4.25 | 45,418 |
| Los Angeles vs. New York | 0 | - | 4.41 | 19,812 |
| Hawaiian Islands Map Quiz | 0 | - | 4.78 | 22,247 |
| Famous People from New York by Picture | 0 | - | 4.03 | 27,456 |
| New York Groups of Things | 0 | - | 4.38 | 63,034 |
| Most-Visited Countries by Canadians | 0 | - | 4.82 | 39,255 |
| Countries Closest to Canada | 0 | - | 4.91 | 198,018 |
| Asian Countries Americans Travel to the Most | 0 | - | 4.75 | 59,887 |
| U.S. Geography by Letter - B | 0 | - | 4.53 | 69,288 |
| U.S. Geography by Letter - S | 0 | - | 4.55 | 52,778 |
| Two Letter U.S. State Abbreviations | 0 | - | 4.19 | 746,177 |
| Countries Closest to the U. S. | 0 | - | 4.41 | 208,842 |
| U.S. Federal Agency Acronyms | 0 | - | 4.50 | 79,920 |
| Top 10 Non-English Languages of Los Angeles | 0 | - | 4.42 | 59,821 |
| Who Did that Motown Song? | 0 | - | 4.48 | 13,045 |
| New England States | 0 | - | 4.51 | 59,782 |
| U.S. States by Land Area | 0 | - | 4.61 | 52,745 |
| Top 10 U.S. States by Inland Water Area | 0 | - | 4.53 | 37,982 |
| Add a Letter - Make a U.S. State | 0 | - | 4.72 | 82,686 |
| Top 10 Widest U.S. States East to West | 0 | - | 4.70 | 55,913 |
| Top 10 Tallest U.S. States North to South | 0 | - | 4.74 | 40,872 |
| U.S. States by Borders | 0 | - | 4.61 | 35,256 |
| 10 Easternmost U.S. States | 0 | - | 4.53 | 56,425 |
| The Only U.S. State ... #1 | 0 | - | 4.52 | 101,940 |
| 50 States, 50 Cities - Hard Version | 0 | - | 4.46 | 44,173 |
| Countries that Beat Canada | 0 | - | 4.90 | 87,287 |
| Asian Last Names in the United States | 0 | - | 4.43 | 46,709 |
| United States Map Quiz | 0 | - | 4.98 | 4,153,868 |
| U.S. States by Picture #1 | 0 | - | 4.21 | 15,416 |
| Countries Closest to Alaska | 0 | - | 4.93 | 124,097 |
| Geography of California | 0 | - | 4.26 | 10,550 |
| Countries Closest to Maine | 0 | - | 4.85 | 66,969 |
| Boroughs of New York City | 0 | - | 4.47 | 84,475 |
| New York Pro Sport Teams | 0 | - | 4.32 | 25,880 |
| Washington State by Picture | 0 | - | 4.26 | 7,716 |
| U.S. License Plates Picture Quiz | 0 | - | 4.59 | 52,845 |
| U.S. States with the Fewest Immigrants | 0 | - | 4.63 | 65,700 |
| U.S. States with the Highest Percentage of Farmland | 0 | - | 4.80 | 65,434 |
| U.S. States with the Lowest Percentage of Farmland | 0 | - | 4.74 | 55,145 |
| Walking Across U.S. State Borders with Hints | 0 | - | 4.74 | 35,022 |
| U.S. States with the Longest International Borders | 0 | - | 4.78 | 45,746 |
| Longest U.S. State Borders | 0 | - | 4.67 | 39,709 |
| Top 10 U.S. States with the Highest Elevation | 0 | - | 4.51 | 67,853 |
| U.S. States with the Lowest Average Elevation | 0 | - | 4.55 | 38,465 |
| U.S. States With the Highest Average Elevation | 0 | - | 4.61 | 32,732 |
| U.S. States with the Fewest Borders | 0 | - | 4.77 | 113,393 |
| U.S. States with the Most Borders | 0 | - | 4.53 | 62,291 |
| Flags of Africa Quiz | 0 | - | 5.00 | 469,229 |
| Belize Country Quiz | 0 | - | 4.85 | 20,933 |
| Top U.S. Universities | 0 | - | 4.15 | 144,844 |
| Largest United States Airlines | 0 | - | 4.39 | 54,991 |
| Third Most Common Language by U.S. State | 0 | - | 4.87 | 113,652 |
| U.S. States by Governor | 0 | - | 4.43 | 18,044 |
| U.S. Political Parties in History | 0 | - | 4.44 | 27,669 |
| U.S. Political Figures by Picture #1 | 0 | - | 4.14 | 26,135 |
| U.S. Political Figures by Picture #2 | 0 | - | 4.10 | 15,504 |
| Female Political Figures by Picture - U.S. | 0 | - | 4.20 | 10,853 |
| U.S. Government Agencies | 0 | - | 4.44 | 19,649 |
| Famous People from Alabama by Picture | 0 | - | 4.07 | 24,034 |
| Florida Pro Sport Teams | 0 | - | 4.61 | 11,822 |
| Hawaiian Islands | 0 | - | 4.83 | 42,651 |
| Famous People from Michigan by Picture | 0 | - | 4.30 | 21,369 |
| Famous People from Texas by Picture | 0 | - | 3.99 | 33,346 |
| U.S. States that Border Tennessee | 0 | - | 4.83 | 65,270 |
| Flags of Europe Quiz | 0 | - | 4.99 | 1,239,881 |
| Flags of Asia Quiz | 0 | - | 4.99 | 611,399 |
| Georgia ... or Georgia? | 0 | - | 4.67 | 76,670 |
| U.S. Geography by Letter - C | 0 | - | 4.27 | 73,985 |
| U.S. Geography by Letter - A | 0 | - | 4.37 | 62,967 |
| U.S. Geography by Letter - D | 0 | - | 4.09 | 56,975 |
| U.S. Geography by Letter - T | 0 | - | 4.29 | 49,658 |
| U.S. Geography by Letter - P | 0 | - | 4.38 | 53,021 |
| U.S. Geography by Letter - M | 0 | - | 4.14 | 53,237 |
| U.S. Geography by Letter - L | 0 | - | 4.04 | 41,029 |
| U.S. Geography by Letter - G | 0 | - | 4.13 | 39,204 |
| U.S. Geography By Letter - H | 0 | - | 4.35 | 40,007 |
| American Legal Vocabulary | 0 | - | 4.40 | 33,882 |
| 10 U.S. States With The Lowest Murder Rates | 0 | - | 4.51 | 41,975 |
| Biggest Trading Partners - United States | 0 | - | 4.63 | 106,585 |
| The U.S. Government - How Does it Work? | 0 | - | 4.34 | 42,323 |
| American Founding Fathers | 0 | - | 4.42 | 23,200 |
| Musical Acts from Los Angeles by Two Songs | 0 | - | 4.27 | 16,046 |
| Movies Set in San Francisco | 0 | - | 4.23 | 19,933 |
| Movies Set in Miami | 0 | - | 4.32 | 16,695 |
| Musical Acts from New York City | 0 | - | 3.80 | 10,146 |
| State Quiz - New York | 0 | - | 4.52 | 46,018 |
| People on Money - United States | 0 | - | 4.31 | 63,320 |
| U.S. History Groups of Two | 0 | - | 4.23 | 44,406 |
| 100 Most Influential Figures in U.S. History | 0 | - | 4.20 | 44,988 |
| Last 10 U.S. States Alphabetically | 0 | - | 4.35 | 74,783 |
| Top 10 Least Populous U.S. State Capitals | 0 | - | 4.52 | 21,506 |
| 10 U.S. States With The Highest Murder Rates | 0 | - | 4.47 | 53,921 |
| Flyover States | 0 | - | 4.52 | 29,478 |
| U.S. States With Double Letters | 0 | - | 4.54 | 24,076 |
| U.S. States Bigger than Their Neighbors | 0 | - | 4.27 | 76,071 |
| U.S. States by Wikipedia Descriptions #1 | 0 | - | 4.57 | 39,313 |
| U.S. States by Wikipedia Descriptions #2 | 0 | - | 4.48 | 37,074 |
| States and Provinces that touch the Rocky Mountains | 0 | - | 4.42 | 32,476 |
| Name a Valid U.S. State #2 | 0 | - | 4.63 | 76,896 |
| Name a Valid U.S. State #3 | 0 | - | 4.78 | 48,956 |
| U.S. State Superlatives #1 | 0 | - | 4.47 | 87,467 |
| U.S. State Superlatives #2 | 0 | - | 4.53 | 40,593 |
| 50 States, 50 Cities - Easy Version | 0 | - | 4.39 | 128,273 |
| Top 10 U.S. States With the Most Tornadoes | 0 | - | 4.53 | 64,687 |
| Top 10 Richest U.S. States by Median Income | 0 | - | 4.47 | 119,019 |
| Top 10 Least Religious U.S. States | 0 | - | 4.51 | 34,255 |
| Top 10 Least-Forested U.S. States | 0 | - | 4.50 | 46,471 |
| Top 10 U.S. States by Public Transit | 0 | - | 4.77 | 63,677 |
| Top 10 U.S. States with the Most Precipitation | 0 | - | 4.46 | 41,667 |
| Pixelated Africa Map | 0 | - | 4.98 | 99,642 |
| Flags of Oceania | 0 | - | 5.00 | 258,152 |
| The Only American Country ... | 0 | - | 4.92 | 121,399 |
| American Countries with the Shortest Names | 0 | - | 4.96 | 120,930 |
| U.S. State Border Crossings | 0 | - | 4.97 | 96,357 |
| U.S. Citizenship Test Questions | 0 | - | 4.83 | 239,164 |
| U.S. Cities with the Most International Tourists | 0 | - | 4.88 | 75,320 |
| Names of Generations | 0 | - | 4.10 | 44,134 |
| Cities and Towns of Massachusetts | 0 | - | 4.92 | 73,732 |
| Countries Larger Than Texas but With Fewer People | 0 | - | 4.92 | 39,816 |
| Regions of U.S. States | 0 | - | 4.37 | 43,790 |
| States, Provinces & Territories that Touch the Appalachian Mountains | 0 | - | 4.59 | 20,369 |
| 10 U.S. States with the Most Valuable Crops | 0 | - | 4.41 | 29,550 |
| U.S. States with the Lowest HDI | 0 | - | 4.47 | 28,832 |
| Which U.S. State - Multiple Choice | 0 | - | 4.48 | 20,271 |
| Movies by State | 0 | - | 4.27 | 40,526 |
| Canada Country Quiz | 0 | - | 4.54 | 132,317 |
| Canada Cities Map Quiz | 0 | - | 4.63 | 124,060 |
| Canada A-Z | 0 | - | 4.73 | 32,773 |
| Three Band Flags of Europe | 0 | - | 4.98 | 192,902 |
| Pixelated Europe Map | 0 | - | 4.88 | 122,498 |
| Pixelated Asia Map | 0 | - | 4.90 | 72,996 |
| Top 10 Biggest Economies in the Americas | 0 | - | 4.94 | 91,915 |
| Mexico Country Quiz | 0 | - | 4.49 | 72,327 |
| All First-Level Subdivisions of South America on a Map | 0 | - | 4.92 | 53,659 |
| Brazil States Map Quiz | 0 | - | 4.85 | 47,862 |
| States of Brazil | 0 | - | 4.97 | 87,633 |
| Fictional Characters from the Midwest by Picture | 0 | - | 4.04 | 19,189 |
| U.S. States by Picture #2 | 0 | - | 3.47 | 11,545 |
| Most-Visited U.S. Cities | 0 | - | 4.85 | 93,483 |
| Every U.S. Metro Area on a Map | 0 | - | 4.97 | 81,531 |
| Senators Who Ran For President | 0 | - | 4.24 | 17,029 |
| U.S. Electoral College Landslides | 0 | - | 4.35 | 22,025 |
| California Pro Sport Teams | 0 | - | 4.19 | 22,676 |
| Chicago City Trivia | 0 | - | 4.31 | 31,433 |
| Texas Pro Sport Teams | 0 | - | 4.19 | 16,807 |
| History of Pennsylvania | 0 | - | 4.16 | 7,129 |
| History of Virginia | 0 | - | 4.31 | 11,589 |
| Washington D.C. by Picture | 0 | - | 4.49 | 26,735 |
