| Pixelated United States Map | 0 | - | 4.87 | 94,334 |
| US States Quiz | 0 | - | 5.00 | 16,889,271 |
| Name the U.S. National Parks | 0 | - | 4.86 | 59,997 |
| Total United States Immigration by Country | 0 | - | 4.91 | 111,726 |
| Most Common U.S. Last Names - Extreme | 0 | - | 4.94 | 174,610 |
| "Do Not Travel" Countries for U.S. Citizens | 0 | - | 4.97 | 244,292 |
| U.S. Cabinet Departments | 0 | - | 4.86 | 72,901 |
| Top 10 Non-English Languages Spoken in New York City | 0 | - | 4.85 | 66,279 |
| States of the U.S. in Alphabetical Order | 0 | - | 4.98 | 367,223 |
| All 3,143 Counties of the United States on a Map | 0 | - | 4.97 | 332,450 |
| Most-Visited Countries by Americans | 0 | - | 4.86 | 109,767 |
| Countries that Visit the United States the Most | 0 | - | 4.96 | 91,841 |
| Deadliest U.S. Wars | 0 | - | 4.89 | 190,880 |
| The 13 Colonies Quiz | 0 | - | 4.97 | 117,981 |
| U.S. States with the Letter Y | 0 | - | 4.85 | 111,523 |
| 10 Southernmost U.S. States | 0 | - | 4.89 | 113,527 |
| U.S. States with Short Names | 0 | - | 4.91 | 149,113 |
| U.S. States that Start with M | 0 | - | 4.93 | 187,407 |
| U.S. States By Population | 0 | - | 4.92 | 153,619 |
| U.S. States that Start with N | 0 | - | 4.95 | 171,534 |
| U.S. States with Longest Names | 0 | - | 4.84 | 44,487 |
| U.S. States with a Unique First Letter | 0 | - | 4.96 | 88,387 |
| 10 Westernmost U.S. States | 0 | - | 4.95 | 64,249 |
| The Only Remaining U.S. State . . . | 0 | - | 4.93 | 65,682 |
| US States with an Empty Map | 0 | - | 5.00 | 625,065 |
| Flags of North and South America | 0 | - | 4.99 | 373,525 |
| 10 Longest Rivers in the United States | 0 | - | 4.85 | 39,194 |
| Countries Closest to United States by Continent | 0 | - | 4.99 | 146,519 |
| Countries that Beat the United States | 0 | - | 4.93 | 167,577 |
| Louisiana Purchase with a Map | 0 | - | 4.96 | 48,684 |
| Top 10 Most-Visited U.S. States | 0 | - | 4.90 | 101,826 |
| U.S. States with the Most Immigrants | 0 | - | 4.85 | 82,527 |
| U.S. States or European Countries by Area | 0 | - | 4.95 | 96,167 |
| U.S. States or European Countries by Population | 0 | - | 4.97 | 133,309 |
| Name a Valid U.S. State #1 | 0 | - | 4.93 | 209,123 |
| Top 10 Coldest U.S. States | 0 | - | 4.94 | 124,719 |
| Top 10 Hottest U.S. States | 0 | - | 4.86 | 125,737 |
| Top 10 Most Native American U.S. States | 0 | - | 4.87 | 92,171 |
| Top 10 U.S. States with the Least Precipitation | 0 | - | 4.82 | 61,933 |
| Who Did that Motown Song? | 0 | - | 4.48 | 13,056 |
| 10 Closest Megacities to New York City | 0 | - | 4.52 | 67,367 |
| States of Mexico | 0 | - | 4.96 | 176,312 |
| Mexico States Map Quiz | 0 | - | 4.84 | 104,824 |
| Midwestern States of the U.S. | 0 | - | 4.88 | 13,847 |
| Mexico Cities Map Quiz | 0 | - | 4.83 | 38,599 |
| U.S. State Nicknames | 0 | - | 4.47 | 50,550 |
| Countries with American Expatriates | 0 | - | 4.53 | 42,590 |
| United States Landmarks Map Quiz | 0 | - | 4.55 | 40,191 |
| U.S. Cities by Picture #1 | 0 | - | 4.36 | 34,581 |
| Cities by Picture #2 | 0 | - | 4.19 | 35,151 |
| United States Country Quiz | 0 | - | 4.43 | 101,589 |
| Busiest Air Routes from the U.S. | 0 | - | 4.46 | 76,906 |
| Famous People from California by Picture | 0 | - | 4.32 | 36,477 |
| California Groups of Things | 0 | - | 4.25 | 45,499 |
| Hawaiian Islands Map Quiz | 0 | - | 4.78 | 22,268 |
| Famous People from Michigan by Picture | 0 | - | 4.30 | 21,404 |
| New York Groups of Things | 0 | - | 4.35 | 63,798 |
| Most-Visited Countries by Canadians | 0 | - | 4.82 | 39,415 |
| Countries Closest to Canada | 0 | - | 4.91 | 198,434 |
| Asian Countries Americans Travel to the Most | 0 | - | 4.75 | 60,002 |
| U.S. Geography by Letter - B | 0 | - | 4.53 | 69,448 |
| U.S. Geography by Letter - S | 0 | - | 4.55 | 52,888 |
| Two Letter U.S. State Abbreviations | 0 | - | 4.19 | 747,410 |
| Countries Closest to the U. S. | 0 | - | 4.41 | 209,594 |
| U.S. Federal Agency Acronyms | 0 | - | 4.50 | 80,001 |
| Top 10 Non-English Languages of Los Angeles | 0 | - | 4.42 | 59,912 |
| New England States | 0 | - | 4.51 | 59,818 |
| U.S. States by Land Area | 0 | - | 4.61 | 52,840 |
| Top 10 U.S. States by Inland Water Area | 0 | - | 4.53 | 38,019 |
| Add a Letter - Make a U.S. State | 0 | - | 4.70 | 82,847 |
| Top 10 Widest U.S. States East to West | 0 | - | 4.70 | 56,035 |
| Top 10 Tallest U.S. States North to South | 0 | - | 4.74 | 40,952 |
| U.S. States by Borders | 0 | - | 4.61 | 35,339 |
| 10 Easternmost U.S. States | 0 | - | 4.53 | 56,500 |
| The Only U.S. State ... #1 | 0 | - | 4.52 | 102,069 |
| 50 States, 50 Cities - Hard Version | 0 | - | 4.46 | 44,241 |
| Countries that Beat Canada | 0 | - | 4.91 | 97,994 |
| Asian Last Names in the United States | 0 | - | 4.43 | 46,795 |
| United States Map Quiz | 0 | - | 4.98 | 4,160,464 |
| U.S. States by Picture #1 | 0 | - | 4.21 | 15,449 |
| Countries Closest to Alaska | 0 | - | 4.93 | 124,418 |
| Geography of California | 0 | - | 4.26 | 10,574 |
| Countries Closest to Maine | 0 | - | 4.85 | 67,155 |
| New York Pro Sport Teams | 0 | - | 4.32 | 25,908 |
| Washington State by Picture | 0 | - | 4.26 | 7,731 |
| U.S. License Plates Picture Quiz | 0 | - | 4.61 | 52,959 |
| U.S. States with the Fewest Immigrants | 0 | - | 4.63 | 65,826 |
| U.S. States with the Highest Percentage of Farmland | 0 | - | 4.80 | 65,510 |
| U.S. States with the Lowest Percentage of Farmland | 0 | - | 4.74 | 55,204 |
| Walking Across U.S. State Borders with Hints | 0 | - | 4.74 | 35,053 |
| U.S. States with the Longest International Borders | 0 | - | 4.78 | 45,816 |
| Longest U.S. State Borders | 0 | - | 4.67 | 39,851 |
| Top 10 U.S. States with the Highest Elevation | 0 | - | 4.51 | 67,882 |
| U.S. States with the Lowest Average Elevation | 0 | - | 4.55 | 38,509 |
| U.S. States With the Highest Average Elevation | 0 | - | 4.61 | 32,780 |
| U.S. States with the Fewest Borders | 0 | - | 4.78 | 113,901 |
| U.S. States with the Most Borders | 0 | - | 4.53 | 62,315 |
| Flags of Africa Quiz | 0 | - | 5.00 | 471,912 |
| Belize Country Quiz | 0 | - | 4.85 | 20,991 |
| Top U.S. Universities | 0 | - | 4.15 | 145,214 |
| Largest United States Airlines | 0 | - | 4.39 | 55,046 |
| Third Most Common Language by U.S. State | 0 | - | 4.87 | 113,758 |
| U.S. States by Governor | 0 | - | 4.43 | 18,067 |
| U.S. Political Parties in History | 0 | - | 4.44 | 27,704 |
| U.S. Political Figures by Picture #1 | 0 | - | 4.14 | 26,168 |
| U.S. Political Figures by Picture #2 | 0 | - | 4.10 | 15,531 |
| Female Political Figures by Picture - U.S. | 0 | - | 4.20 | 10,867 |
| U.S. Government Agencies | 0 | - | 4.44 | 19,690 |
| Famous People from Alabama by Picture | 0 | - | 4.07 | 24,069 |
| Los Angeles vs. New York | 0 | - | 4.41 | 19,884 |
| Florida Pro Sport Teams | 0 | - | 4.61 | 11,851 |
| Hawaiian Islands | 0 | - | 4.83 | 42,736 |
| Famous People from New York by Picture | 0 | - | 4.03 | 27,502 |
| Famous People from Texas by Picture | 0 | - | 3.99 | 33,379 |
| U.S. States that Border Tennessee | 0 | - | 4.83 | 65,342 |
| Events in U.S. History | 0 | - | 4.41 | 28,686 |
| Flags of Europe Quiz | 0 | - | 4.99 | 1,245,504 |
| Flags of Asia Quiz | 0 | - | 4.99 | 614,206 |
| Georgia ... or Georgia? | 0 | - | 4.67 | 76,809 |
| U.S. Geography by Letter - C | 0 | - | 4.27 | 74,109 |
| U.S. Geography by Letter - A | 0 | - | 4.37 | 63,122 |
| U.S. Geography by Letter - D | 0 | - | 4.09 | 57,116 |
| U.S. Geography by Letter - T | 0 | - | 4.29 | 49,810 |
| U.S. Geography by Letter - P | 0 | - | 4.38 | 53,925 |
| U.S. Geography by Letter - M | 0 | - | 4.14 | 53,349 |
| U.S. Geography by Letter - L | 0 | - | 4.04 | 41,169 |
| U.S. Geography by Letter - G | 0 | - | 4.13 | 39,330 |
| U.S. Geography By Letter - H | 0 | - | 4.35 | 40,175 |
| American Legal Vocabulary | 0 | - | 4.40 | 33,926 |
| 10 U.S. States With The Lowest Murder Rates | 0 | - | 4.48 | 50,832 |
| Biggest Trading Partners - United States | 0 | - | 4.63 | 106,678 |
| The U.S. Government - How Does it Work? | 0 | - | 4.34 | 42,373 |
| American Founding Fathers | 0 | - | 4.42 | 23,230 |
| Musical Acts from Los Angeles by Two Songs | 0 | - | 4.27 | 16,129 |
| Movies Set in San Francisco | 0 | - | 4.23 | 19,939 |
| Movies Set in Miami | 0 | - | 4.32 | 16,699 |
| People on Money - United States | 0 | - | 4.31 | 63,354 |
| U.S. History Groups of Two | 0 | - | 4.23 | 44,477 |
| 100 Most Influential Figures in U.S. History | 0 | - | 4.20 | 45,081 |
| Last 10 U.S. States Alphabetically | 0 | - | 4.35 | 74,866 |
| Top 10 Least Populous U.S. State Capitals | 0 | - | 4.52 | 21,533 |
| 10 U.S. States With The Highest Murder Rates | 0 | - | 4.47 | 54,386 |
| Flyover States | 0 | - | 4.52 | 29,522 |
| U.S. States With Double Letters | 0 | - | 4.55 | 24,135 |
| U.S. States Bigger than Their Neighbors | 0 | - | 4.28 | 76,196 |
| U.S. States by Wikipedia Descriptions #1 | 0 | - | 4.57 | 39,358 |
| U.S. States by Wikipedia Descriptions #2 | 0 | - | 4.48 | 37,113 |
| States and Provinces that touch the Rocky Mountains | 0 | - | 4.43 | 32,509 |
| Name a Valid U.S. State #2 | 0 | - | 4.63 | 77,059 |
| Name a Valid U.S. State #3 | 0 | - | 4.78 | 49,053 |
| U.S. State Superlatives #1 | 0 | - | 4.47 | 87,550 |
| U.S. State Superlatives #2 | 0 | - | 4.53 | 40,647 |
| 50 States, 50 Cities - Easy Version | 0 | - | 4.39 | 128,412 |
| Top 10 U.S. States With the Most Tornadoes | 0 | - | 4.53 | 64,787 |
| Top 10 Richest U.S. States by Median Income | 0 | - | 4.47 | 119,128 |
| Top 10 Least Religious U.S. States | 0 | - | 4.51 | 34,321 |
| Top 10 Least-Forested U.S. States | 0 | - | 4.50 | 46,535 |
| Top 10 U.S. States by Public Transit | 0 | - | 4.77 | 63,791 |
| Top 10 U.S. States with the Most Precipitation | 0 | - | 4.46 | 41,713 |
| Pixelated Africa Map | 0 | - | 4.98 | 99,921 |
| Flags of Oceania | 0 | - | 5.00 | 259,736 |
| The Only American Country ... | 0 | - | 4.92 | 121,680 |
| American Countries with the Shortest Names | 0 | - | 4.96 | 121,175 |
| U.S. State Border Crossings | 0 | - | 4.97 | 96,525 |
| U.S. Citizenship Test Questions | 0 | - | 4.83 | 239,550 |
| U.S. Cities with the Most International Tourists | 0 | - | 4.88 | 75,520 |
| Names of Generations | 0 | - | 4.09 | 45,014 |
| Cities and Towns of Massachusetts | 0 | - | 4.92 | 74,197 |
| Countries Larger Than Texas but With Fewer People | 0 | - | 4.92 | 39,974 |
| Regions of U.S. States | 0 | - | 4.37 | 43,912 |
| States, Provinces & Territories that Touch the Appalachian Mountains | 0 | - | 4.59 | 20,391 |
| 10 U.S. States with the Most Valuable Crops | 0 | - | 4.41 | 29,581 |
| U.S. States with the Lowest HDI | 0 | - | 4.47 | 28,860 |
| Which U.S. State - Multiple Choice | 0 | - | 4.48 | 20,303 |
| Movies by State | 0 | - | 4.27 | 40,552 |
| Canada Country Quiz | 0 | - | 4.54 | 132,545 |
| Canada Cities Map Quiz | 0 | - | 4.64 | 124,253 |
| Canada A-Z | 0 | - | 4.73 | 32,845 |
| Three Band Flags of Europe | 0 | - | 4.98 | 193,456 |
| Pixelated Europe Map | 0 | - | 4.88 | 122,834 |
| Pixelated Asia Map | 0 | - | 4.90 | 73,277 |
| Top 10 Biggest Economies in the Americas | 0 | - | 4.94 | 92,257 |
| Mexico Country Quiz | 0 | - | 4.49 | 72,470 |
| All First-Level Subdivisions of South America on a Map | 0 | - | 4.92 | 54,007 |
| Brazil States Map Quiz | 0 | - | 4.85 | 48,127 |
| States of Brazil | 0 | - | 4.97 | 88,264 |
| Fictional Characters from the Midwest by Picture | 0 | - | 4.04 | 19,201 |
| U.S. States by Picture #2 | 0 | - | 3.47 | 11,554 |
| Most-Visited U.S. Cities | 0 | - | 4.85 | 93,980 |
| Every U.S. Metro Area on a Map | 0 | - | 4.97 | 81,867 |
| Senators Who Ran For President | 0 | - | 4.24 | 17,047 |
| U.S. Electoral College Landslides | 0 | - | 4.35 | 22,043 |
| California Pro Sport Teams | 0 | - | 4.19 | 22,692 |
| Chicago City Trivia | 0 | - | 4.31 | 31,461 |
| State Quiz - Michigan | 0 | - | 4.27 | 52,223 |
| Texas Pro Sport Teams | 0 | - | 4.19 | 16,826 |
| History of Pennsylvania | 0 | - | 4.16 | 7,139 |
| History of Virginia | 0 | - | 4.31 | 11,602 |
| Washington D.C. by Picture | 0 | - | 4.49 | 26,768 |
| Events by U.S. State #1 | 0 | - | 4.43 | 22,915 |
