| Pixelated United States Map | 0 | - | 4.89 | 94,931 |
| US States Quiz | 0 | - | 5.00 | 17,021,997 |
| Name the U.S. National Parks | 0 | - | 4.86 | 60,594 |
| Total United States Immigration by Country | 0 | - | 4.91 | 112,553 |
| Most Common U.S. Last Names - Extreme | 0 | - | 4.94 | 175,742 |
| "Do Not Travel" Countries for U.S. Citizens | 0 | - | 4.97 | 247,020 |
| U.S. Cabinet Departments | 0 | - | 4.86 | 73,163 |
| Top 10 Non-English Languages Spoken in New York City | 0 | - | 4.85 | 66,818 |
| States of the U.S. in Alphabetical Order | 0 | - | 4.98 | 368,884 |
| All 3,143 Counties of the United States on a Map | 0 | - | 4.97 | 336,200 |
| Most-Visited Countries by Americans | 0 | - | 4.86 | 110,740 |
| Countries that Visit the United States the Most | 0 | - | 4.96 | 92,593 |
| Deadliest U.S. Wars | 0 | - | 4.89 | 191,973 |
| The 13 Colonies Quiz | 0 | - | 4.97 | 119,179 |
| U.S. States with the Letter Y | 0 | - | 4.86 | 112,428 |
| 10 Southernmost U.S. States | 0 | - | 4.89 | 114,452 |
| U.S. States with Short Names | 0 | - | 4.91 | 150,507 |
| U.S. States that Start with M | 0 | - | 4.93 | 188,555 |
| U.S. States By Population | 0 | - | 4.92 | 154,258 |
| U.S. States that Start with N | 0 | - | 4.95 | 172,368 |
| U.S. States with Longest Names | 0 | - | 4.85 | 44,974 |
| U.S. States with a Unique First Letter | 0 | - | 4.96 | 88,974 |
| 10 Westernmost U.S. States | 0 | - | 4.95 | 64,595 |
| The Only Remaining U.S. State . . . | 0 | - | 4.93 | 66,207 |
| US States with an Empty Map | 0 | - | 5.00 | 629,564 |
| Flags of North and South America | 0 | - | 4.99 | 378,118 |
| 10 Longest Rivers in the United States | 0 | - | 4.85 | 39,454 |
| Countries Closest to United States by Continent | 0 | - | 4.99 | 147,390 |
| Countries that Beat the United States | 0 | - | 4.93 | 168,901 |
| Louisiana Purchase with a Map | 0 | - | 4.96 | 49,453 |
| Top 10 Most-Visited U.S. States | 0 | - | 4.90 | 102,576 |
| U.S. States with the Most Immigrants | 0 | - | 4.85 | 83,107 |
| U.S. States or European Countries by Area | 0 | - | 4.95 | 97,381 |
| U.S. States or European Countries by Population | 0 | - | 4.97 | 134,594 |
| Name a Valid U.S. State #1 | 0 | - | 4.93 | 210,848 |
| Top 10 Coldest U.S. States | 0 | - | 4.94 | 126,002 |
| Top 10 Hottest U.S. States | 0 | - | 4.86 | 126,671 |
| Top 10 Most Native American U.S. States | 0 | - | 4.87 | 92,988 |
| Top 10 U.S. States with the Least Precipitation | 0 | - | 4.83 | 62,266 |
| 10 Closest Megacities to New York City | 0 | - | 4.52 | 67,560 |
| States of Mexico | 0 | - | 4.96 | 178,722 |
| Mexico States Map Quiz | 0 | - | 4.85 | 105,776 |
| Midwestern States of the U.S. | 0 | - | 4.88 | 14,214 |
| Mexico Cities Map Quiz | 0 | - | 4.83 | 38,867 |
| U.S. State Nicknames | 0 | - | 4.47 | 50,798 |
| Countries with American Expatriates | 0 | - | 4.53 | 42,697 |
| United States Landmarks Map Quiz | 0 | - | 4.55 | 40,294 |
| U.S. Cities by Picture #1 | 0 | - | 4.36 | 34,762 |
| Cities by Picture #2 | 0 | - | 4.19 | 35,330 |
| United States Country Quiz | 0 | - | 4.43 | 102,338 |
| Busiest Air Routes from the U.S. | 0 | - | 4.46 | 77,100 |
| Famous People from California by Picture | 0 | - | 4.32 | 36,748 |
| California Groups of Things | 0 | - | 4.26 | 45,804 |
| Hawaiian Islands Map Quiz | 0 | - | 4.78 | 22,328 |
| New York Groups of Things | 0 | - | 4.39 | 72,369 |
| Most-Visited Countries by Canadians | 0 | - | 4.83 | 39,668 |
| Countries Closest to Canada | 0 | - | 4.91 | 199,647 |
| Asian Countries Americans Travel to the Most | 0 | - | 4.75 | 60,256 |
| U.S. Geography by Letter - B | 0 | - | 4.54 | 70,146 |
| U.S. Geography by Letter - S | 0 | - | 4.55 | 58,554 |
| Two Letter U.S. State Abbreviations | 0 | - | 4.19 | 750,311 |
| Countries Closest to the U. S. | 0 | - | 4.41 | 210,732 |
| U.S. Federal Agency Acronyms | 0 | - | 4.50 | 80,182 |
| Top 10 Non-English Languages of Los Angeles | 0 | - | 4.43 | 60,161 |
| Movies Set in Miami | 0 | - | 4.32 | 16,722 |
| Who Did that Motown Song? | 0 | - | 4.48 | 13,080 |
| New England States | 0 | - | 4.51 | 59,913 |
| U.S. States by Land Area | 0 | - | 4.55 | 53,115 |
| Top 10 U.S. States by Inland Water Area | 0 | - | 4.53 | 38,138 |
| Add a Letter - Make a U.S. State | 0 | - | 4.70 | 83,219 |
| Top 10 Widest U.S. States East to West | 0 | - | 4.70 | 56,336 |
| Top 10 Tallest U.S. States North to South | 0 | - | 4.75 | 41,184 |
| U.S. States by Borders | 0 | - | 4.61 | 35,514 |
| 10 Easternmost U.S. States | 0 | - | 4.53 | 56,719 |
| The Only U.S. State ... #1 | 0 | - | 4.52 | 102,396 |
| 50 States, 50 Cities - Hard Version | 0 | - | 4.46 | 44,479 |
| Countries that Beat Canada | 0 | - | 4.90 | 99,119 |
| Asian Last Names in the United States | 0 | - | 4.43 | 47,007 |
| United States Map Quiz | 0 | - | 4.98 | 4,173,504 |
| U.S. States by Picture #1 | 0 | - | 4.21 | 15,523 |
| Countries Closest to Alaska | 0 | - | 4.93 | 125,292 |
| Geography of California | 0 | - | 4.26 | 10,747 |
| Countries Closest to Maine | 0 | - | 4.85 | 67,693 |
| New York Pro Sport Teams | 0 | - | 4.32 | 25,977 |
| Washington State by Picture | 0 | - | 4.26 | 7,763 |
| U.S. License Plates Picture Quiz | 0 | - | 4.61 | 53,187 |
| U.S. States with the Fewest Immigrants | 0 | - | 4.64 | 66,165 |
| U.S. States with the Highest Percentage of Farmland | 0 | - | 4.80 | 65,681 |
| U.S. States with the Lowest Percentage of Farmland | 0 | - | 4.70 | 61,504 |
| Walking Across U.S. State Borders with Hints | 0 | - | 4.75 | 35,135 |
| U.S. States with the Longest International Borders | 0 | - | 4.78 | 45,979 |
| Longest U.S. State Borders | 0 | - | 4.69 | 40,196 |
| Top 10 U.S. States with the Highest Elevation | 0 | - | 4.51 | 67,996 |
| U.S. States with the Lowest Average Elevation | 0 | - | 4.55 | 38,584 |
| U.S. States With the Highest Average Elevation | 0 | - | 4.61 | 32,850 |
| U.S. States with the Fewest Borders | 0 | - | 4.78 | 114,557 |
| U.S. States with the Most Borders | 0 | - | 4.53 | 62,385 |
| Belize Country Quiz | 0 | - | 4.85 | 21,116 |
| Top U.S. Universities | 0 | - | 4.15 | 145,981 |
| Largest United States Airlines | 0 | - | 4.39 | 55,184 |
| Third Most Common Language by U.S. State | 0 | - | 4.87 | 114,038 |
| U.S. States by Governor | 0 | - | 4.43 | 18,122 |
| U.S. Political Parties in History | 0 | - | 4.44 | 27,783 |
| U.S. Political Figures by Picture #1 | 0 | - | 4.14 | 26,224 |
| U.S. Political Figures by Picture #2 | 0 | - | 4.10 | 15,577 |
| Female Political Figures by Picture - U.S. | 0 | - | 4.22 | 10,911 |
| U.S. Government Agencies | 0 | - | 4.44 | 19,804 |
| Famous People from Alabama by Picture | 0 | - | 4.07 | 24,147 |
| Los Angeles vs. New York | 0 | - | 4.41 | 20,072 |
| Florida Pro Sport Teams | 0 | - | 4.61 | 11,914 |
| Hawaiian Islands | 0 | - | 4.83 | 43,002 |
| Famous People from Michigan by Picture | 0 | - | 4.30 | 21,518 |
| Famous People from New York by Picture | 0 | - | 4.03 | 27,639 |
| Famous People from Texas by Picture | 0 | - | 4.00 | 33,479 |
| U.S. States that Border Tennessee | 0 | - | 4.83 | 65,573 |
| Events in U.S. History | 0 | - | 4.41 | 28,858 |
| Flags of Europe Quiz | 0 | - | 4.99 | 1,261,332 |
| Flags of Asia Quiz | 0 | - | 4.99 | 621,887 |
| Flags of Africa Quiz | 0 | - | 5.00 | 479,069 |
| U.S. Geography by Letter - C | 0 | - | 4.27 | 74,686 |
| U.S. Geography by Letter - A | 0 | - | 4.37 | 63,741 |
| U.S. Geography by Letter - D | 0 | - | 4.09 | 57,699 |
| U.S. Geography by Letter - T | 0 | - | 4.29 | 50,460 |
| U.S. Geography by Letter - P | 0 | - | 4.40 | 54,611 |
| U.S. Geography by Letter - M | 0 | - | 4.14 | 53,777 |
| U.S. Geography by Letter - L | 0 | - | 4.04 | 41,724 |
| U.S. Geography by Letter - G | 0 | - | 4.13 | 39,867 |
| U.S. Geography by Letter - R | 0 | - | 4.22 | 37,072 |
| U.S. Geography By Letter - H | 0 | - | 4.35 | 40,801 |
| American Legal Vocabulary | 0 | - | 4.40 | 34,046 |
| 10 U.S. States With The Lowest Murder Rates | 0 | - | 4.48 | 53,113 |
| Biggest Trading Partners - United States | 0 | - | 4.63 | 106,913 |
| The U.S. Government - How Does it Work? | 0 | - | 4.34 | 42,495 |
| American Founding Fathers | 0 | - | 4.42 | 23,283 |
| Musical Acts from Los Angeles by Two Songs | 0 | - | 4.27 | 16,363 |
| Movies Set in San Francisco | 0 | - | 4.23 | 19,963 |
| Famous People from Florida by Picture | 0 | - | 3.86 | 19,844 |
| State Quiz - Florida | 0 | - | 4.47 | 62,748 |
| People on Money - United States | 0 | - | 4.31 | 63,460 |
| U.S. History Groups of Two | 0 | - | 4.23 | 44,627 |
| 100 Most Influential Figures in U.S. History | 0 | - | 4.20 | 48,402 |
| Last 10 U.S. States Alphabetically | 0 | - | 4.35 | 75,107 |
| Top 10 Least Populous U.S. State Capitals | 0 | - | 4.52 | 21,580 |
| 10 U.S. States With The Highest Murder Rates | 0 | - | 4.47 | 54,916 |
| Flyover States | 0 | - | 4.53 | 29,615 |
| U.S. States With Double Letters | 0 | - | 4.55 | 24,302 |
| U.S. States Bigger than Their Neighbors | 0 | - | 4.28 | 76,454 |
| U.S. States by Wikipedia Descriptions #1 | 0 | - | 4.57 | 39,481 |
| U.S. States by Wikipedia Descriptions #2 | 0 | - | 4.48 | 37,208 |
| States and Provinces that touch the Rocky Mountains | 0 | - | 4.43 | 32,576 |
| Name a Valid U.S. State #2 | 0 | - | 4.63 | 77,476 |
| Name a Valid U.S. State #3 | 0 | - | 4.78 | 49,344 |
| U.S. State Superlatives #1 | 0 | - | 4.47 | 87,714 |
| U.S. State Superlatives #2 | 0 | - | 4.53 | 40,785 |
| 50 States, 50 Cities - Easy Version | 0 | - | 4.39 | 129,042 |
| Top 10 U.S. States With the Most Tornadoes | 0 | - | 4.54 | 65,055 |
| Top 10 Richest U.S. States by Median Income | 0 | - | 4.46 | 119,383 |
| Top 10 Least Religious U.S. States | 0 | - | 4.51 | 34,483 |
| Top 10 Least-Forested U.S. States | 0 | - | 4.50 | 46,707 |
| Top 10 U.S. States by Public Transit | 0 | - | 4.74 | 64,103 |
| Top 10 U.S. States with the Most Precipitation | 0 | - | 4.46 | 41,846 |
| Georgia ... or Georgia? | 0 | - | 4.68 | 77,093 |
| Flags of Oceania | 0 | - | 5.00 | 263,469 |
| The Only American Country ... | 0 | - | 4.92 | 122,348 |
| American Countries with the Shortest Names | 0 | - | 4.97 | 121,772 |
| U.S. State Border Crossings | 0 | - | 4.97 | 96,958 |
| U.S. Citizenship Test Questions | 0 | - | 4.83 | 240,966 |
| U.S. Cities with the Most International Tourists | 0 | - | 4.88 | 76,055 |
| Names of Generations | 0 | - | 4.09 | 45,594 |
| History of Florida | 0 | - | 4.45 | 9,880 |
| Cities and Towns of Massachusetts | 0 | - | 4.93 | 75,193 |
| Countries Larger Than Texas but With Fewer People | 0 | - | 4.92 | 40,331 |
| Regions of U.S. States | 0 | - | 4.37 | 44,254 |
| States, Provinces & Territories that Touch the Appalachian Mountains | 0 | - | 4.59 | 20,430 |
| 10 U.S. States with the Most Valuable Crops | 0 | - | 4.41 | 29,641 |
| U.S. States with the Lowest HDI | 0 | - | 4.47 | 28,943 |
| Which U.S. State - Multiple Choice | 0 | - | 4.48 | 20,384 |
| Movies by State | 0 | - | 4.27 | 40,619 |
| Canada Country Quiz | 0 | - | 4.55 | 133,169 |
| Canada Cities Map Quiz | 0 | - | 4.64 | 124,684 |
| Canada A-Z | 0 | - | 4.73 | 32,993 |
| Three Band Flags of Europe | 0 | - | 4.98 | 194,850 |
| Pixelated Europe Map | 0 | - | 4.88 | 123,618 |
| Pixelated Asia Map | 0 | - | 4.90 | 73,886 |
| Pixelated Africa Map | 0 | - | 4.98 | 100,590 |
| Top 10 Biggest Economies in the Americas | 0 | - | 4.94 | 92,948 |
| Mexico Country Quiz | 0 | - | 4.49 | 72,825 |
| All First-Level Subdivisions of South America on a Map | 0 | - | 4.93 | 55,016 |
| Brazil States Map Quiz | 0 | - | 4.86 | 48,720 |
| States of Brazil | 0 | - | 4.98 | 90,037 |
| Fictional Characters from the Midwest by Picture | 0 | - | 4.04 | 19,239 |
| U.S. States by Picture #2 | 0 | - | 3.47 | 11,605 |
| Most-Visited U.S. Cities | 0 | - | 4.85 | 95,282 |
| Every U.S. Metro Area on a Map | 0 | - | 4.97 | 83,433 |
| Senators Who Ran For President | 0 | - | 4.24 | 17,092 |
| U.S. Electoral College Landslides | 0 | - | 4.35 | 22,099 |
| California Pro Sport Teams | 0 | - | 4.19 | 22,718 |
| Chicago City Trivia | 0 | - | 4.31 | 31,535 |
| Texas Pro Sport Teams | 0 | - | 4.19 | 16,864 |
| History of Pennsylvania | 0 | - | 4.16 | 7,171 |
