| Pixelated United States Map | 0 | - | 4.88 | 94,484 |
| US States Quiz | 0 | - | 5.00 | 16,919,295 |
| Name the U.S. National Parks | 0 | - | 4.86 | 60,116 |
| Total United States Immigration by Country | 0 | - | 4.91 | 111,882 |
| Most Common U.S. Last Names - Extreme | 0 | - | 4.94 | 174,858 |
| "Do Not Travel" Countries for U.S. Citizens | 0 | - | 4.97 | 244,865 |
| U.S. Cabinet Departments | 0 | - | 4.86 | 72,940 |
| Top 10 Non-English Languages Spoken in New York City | 0 | - | 4.85 | 66,405 |
| States of the U.S. in Alphabetical Order | 0 | - | 4.98 | 367,823 |
| All 3,143 Counties of the United States on a Map | 0 | - | 4.97 | 333,178 |
| Most-Visited Countries by Americans | 0 | - | 4.86 | 109,947 |
| Countries that Visit the United States the Most | 0 | - | 4.96 | 92,000 |
| Deadliest U.S. Wars | 0 | - | 4.89 | 191,083 |
| The 13 Colonies Quiz | 0 | - | 4.97 | 118,139 |
| U.S. States with the Letter Y | 0 | - | 4.85 | 111,719 |
| 10 Southernmost U.S. States | 0 | - | 4.89 | 113,678 |
| U.S. States with Short Names | 0 | - | 4.91 | 149,348 |
| U.S. States that Start with M | 0 | - | 4.93 | 187,662 |
| U.S. States By Population | 0 | - | 4.92 | 153,750 |
| U.S. States that Start with N | 0 | - | 4.95 | 171,720 |
| U.S. States with Longest Names | 0 | - | 4.84 | 44,601 |
| U.S. States with a Unique First Letter | 0 | - | 4.96 | 88,507 |
| 10 Westernmost U.S. States | 0 | - | 4.95 | 64,337 |
| The Only Remaining U.S. State . . . | 0 | - | 4.93 | 65,800 |
| US States with an Empty Map | 0 | - | 5.00 | 626,049 |
| Flags of North and South America | 0 | - | 4.99 | 374,381 |
| 10 Longest Rivers in the United States | 0 | - | 4.85 | 39,239 |
| Countries Closest to United States by Continent | 0 | - | 4.99 | 146,699 |
| Countries that Beat the United States | 0 | - | 4.93 | 167,827 |
| Louisiana Purchase with a Map | 0 | - | 4.96 | 48,852 |
| Top 10 Most-Visited U.S. States | 0 | - | 4.90 | 101,946 |
| U.S. States with the Most Immigrants | 0 | - | 4.85 | 82,611 |
| U.S. States or European Countries by Area | 0 | - | 4.95 | 96,390 |
| U.S. States or European Countries by Population | 0 | - | 4.97 | 133,522 |
| Name a Valid U.S. State #1 | 0 | - | 4.93 | 209,486 |
| Top 10 Coldest U.S. States | 0 | - | 4.94 | 125,326 |
| Top 10 Hottest U.S. States | 0 | - | 4.86 | 125,957 |
| Top 10 Most Native American U.S. States | 0 | - | 4.87 | 92,350 |
| Top 10 U.S. States with the Least Precipitation | 0 | - | 4.82 | 62,012 |
| States of Mexico | 0 | - | 4.96 | 176,802 |
| Mexico States Map Quiz | 0 | - | 4.84 | 105,145 |
| Midwestern States of the U.S. | 0 | - | 4.88 | 13,921 |
| Mexico Cities Map Quiz | 0 | - | 4.83 | 38,673 |
| U.S. State Nicknames | 0 | - | 4.47 | 50,596 |
| Countries with American Expatriates | 0 | - | 4.53 | 42,617 |
| United States Landmarks Map Quiz | 0 | - | 4.55 | 40,216 |
| U.S. Cities by Picture #1 | 0 | - | 4.36 | 34,617 |
| Cities by Picture #2 | 0 | - | 4.19 | 35,184 |
| United States Country Quiz | 0 | - | 4.43 | 101,727 |
| Busiest Air Routes from the U.S. | 0 | - | 4.46 | 76,966 |
| Most-Visited Countries by Canadians | 0 | - | 4.83 | 39,451 |
| Countries Closest to Canada | 0 | - | 4.91 | 198,606 |
| Asian Countries Americans Travel to the Most | 0 | - | 4.75 | 60,065 |
| U.S. Geography by Letter - B | 0 | - | 4.53 | 69,645 |
| U.S. Geography by Letter - S | 0 | - | 4.55 | 53,066 |
| Two Letter U.S. State Abbreviations | 0 | - | 4.19 | 748,072 |
| Countries Closest to the U. S. | 0 | - | 4.41 | 209,843 |
| American Geography Quiz for Dummies | 0 | - | 4.41 | 69,254 |
| U.S. Federal Agency Acronyms | 0 | - | 4.50 | 80,039 |
| Top 10 Non-English Languages of Los Angeles | 0 | - | 4.43 | 59,959 |
| 10 Closest Megacities to New York City | 0 | - | 4.52 | 67,397 |
| New England States | 0 | - | 4.51 | 59,836 |
| U.S. States by Land Area | 0 | - | 4.63 | 52,900 |
| Top 10 U.S. States by Inland Water Area | 0 | - | 4.53 | 38,038 |
| Add a Letter - Make a U.S. State | 0 | - | 4.70 | 82,923 |
| Top 10 Widest U.S. States East to West | 0 | - | 4.70 | 56,121 |
| Top 10 Tallest U.S. States North to South | 0 | - | 4.74 | 41,008 |
| U.S. States by Borders | 0 | - | 4.61 | 35,380 |
| 10 Easternmost U.S. States | 0 | - | 4.53 | 56,547 |
| The Only U.S. State ... #1 | 0 | - | 4.52 | 102,146 |
| 50 States, 50 Cities - Hard Version | 0 | - | 4.46 | 44,274 |
| Countries that Beat Canada | 0 | - | 4.91 | 98,510 |
| Asian Last Names in the United States | 0 | - | 4.43 | 46,840 |
| United States Map Quiz | 0 | - | 4.98 | 4,163,715 |
| U.S. States by Picture #1 | 0 | - | 4.21 | 15,468 |
| Washington State by Picture | 0 | - | 4.26 | 7,738 |
| U.S. License Plates Picture Quiz | 0 | - | 4.61 | 52,992 |
| U.S. States with the Fewest Immigrants | 0 | - | 4.63 | 65,899 |
| U.S. States with the Highest Percentage of Farmland | 0 | - | 4.80 | 65,539 |
| U.S. States with the Lowest Percentage of Farmland | 0 | - | 4.74 | 55,247 |
| Walking Across U.S. State Borders with Hints | 0 | - | 4.74 | 35,072 |
| U.S. States with the Longest International Borders | 0 | - | 4.78 | 45,848 |
| Longest U.S. State Borders | 0 | - | 4.67 | 39,930 |
| Top 10 U.S. States with the Highest Elevation | 0 | - | 4.51 | 67,910 |
| U.S. States with the Lowest Average Elevation | 0 | - | 4.55 | 38,526 |
| U.S. States With the Highest Average Elevation | 0 | - | 4.61 | 32,793 |
| U.S. States with the Fewest Borders | 0 | - | 4.78 | 113,988 |
| U.S. States with the Most Borders | 0 | - | 4.53 | 62,324 |
| O Canada Lyrics | 0 | - | 4.47 | 50,983 |
| Belize Country Quiz | 0 | - | 4.85 | 21,014 |
| Top U.S. Universities | 0 | - | 4.15 | 145,383 |
| Largest United States Airlines | 0 | - | 4.39 | 55,075 |
| Third Most Common Language by U.S. State | 0 | - | 4.87 | 113,809 |
| U.S. States by Governor | 0 | - | 4.43 | 18,079 |
| U.S. Political Parties in History | 0 | - | 4.44 | 27,716 |
| U.S. Political Figures by Picture #1 | 0 | - | 4.14 | 26,180 |
| U.S. Political Figures by Picture #2 | 0 | - | 4.10 | 15,541 |
| Female Political Figures by Picture - U.S. | 0 | - | 4.22 | 10,875 |
| U.S. Government Agencies | 0 | - | 4.44 | 19,712 |
| America the Beautiful Lyrics | 0 | - | 4.27 | 19,770 |
| Florida Pro Sport Teams | 0 | - | 4.61 | 11,865 |
| Events in U.S. History | 0 | - | 4.41 | 28,715 |
| Flags of Europe Quiz | 0 | - | 4.99 | 1,248,730 |
| Flags of Asia Quiz | 0 | - | 4.99 | 615,938 |
| Flags of Africa Quiz | 0 | - | 5.00 | 473,259 |
| U.S. Geography by Letter - C | 0 | - | 4.27 | 74,261 |
| U.S. Geography by Letter - A | 0 | - | 4.37 | 63,282 |
| U.S. Geography by Letter - D | 0 | - | 4.09 | 57,254 |
| U.S. Geography by Letter - T | 0 | - | 4.29 | 49,956 |
| U.S. Geography by Letter - P | 0 | - | 4.38 | 54,103 |
| U.S. Geography by Letter - M | 0 | - | 4.14 | 53,450 |
| U.S. Geography by Letter - L | 0 | - | 4.04 | 41,291 |
| U.S. Geography by Letter - G | 0 | - | 4.13 | 39,455 |
| U.S. Geography by Letter - R | 0 | - | 4.22 | 35,040 |
| U.S. Geography By Letter - H | 0 | - | 4.35 | 40,331 |
| American Legal Vocabulary | 0 | - | 4.40 | 33,961 |
| 10 U.S. States With The Lowest Murder Rates | 0 | - | 4.48 | 52,124 |
| Biggest Trading Partners - United States | 0 | - | 4.63 | 106,734 |
| The U.S. Government - How Does it Work? | 0 | - | 4.34 | 42,400 |
| American Founding Fathers | 0 | - | 4.42 | 23,242 |
| Famous People from California by Picture | 0 | - | 4.32 | 36,537 |
| California Groups of Things | 0 | - | 4.25 | 45,529 |
| Hawaiian Islands Map Quiz | 0 | - | 4.78 | 22,292 |
| Boston Talk to English Translation Quiz | 0 | - | 4.59 | 56,029 |
| New York Groups of Things | 0 | - | 4.35 | 63,947 |
| People on Money - United States | 0 | - | 4.31 | 63,375 |
| U.S. History Groups of Two | 0 | - | 4.23 | 44,505 |
| 100 Most Influential Figures in U.S. History | 0 | - | 4.20 | 45,121 |
| Last 10 U.S. States Alphabetically | 0 | - | 4.35 | 74,922 |
| Top 10 Least Populous U.S. State Capitals | 0 | - | 4.52 | 21,539 |
| 10 U.S. States With The Highest Murder Rates | 0 | - | 4.47 | 54,543 |
| Flyover States | 0 | - | 4.52 | 29,538 |
| U.S. States With Double Letters | 0 | - | 4.55 | 24,172 |
| U.S. States Bigger than Their Neighbors | 0 | - | 4.28 | 76,259 |
| U.S. States by Wikipedia Descriptions #1 | 0 | - | 4.57 | 39,384 |
| U.S. States by Wikipedia Descriptions #2 | 0 | - | 4.48 | 37,136 |
| States and Provinces that touch the Rocky Mountains | 0 | - | 4.43 | 32,515 |
| Name a Valid U.S. State #2 | 0 | - | 4.63 | 77,155 |
| Name a Valid U.S. State #3 | 0 | - | 4.78 | 49,107 |
| U.S. State Superlatives #1 | 0 | - | 4.47 | 87,579 |
| U.S. State Superlatives #2 | 0 | - | 4.53 | 40,674 |
| 50 States, 50 Cities - Easy Version | 0 | - | 4.39 | 128,488 |
| Top 10 U.S. States With the Most Tornadoes | 0 | - | 4.53 | 64,860 |
| Top 10 Richest U.S. States by Median Income | 0 | - | 4.47 | 119,175 |
| Top 10 Least Religious U.S. States | 0 | - | 4.51 | 34,354 |
| Top 10 Least-Forested U.S. States | 0 | - | 4.50 | 46,569 |
| Top 10 U.S. States by Public Transit | 0 | - | 4.77 | 63,864 |
| Top 10 U.S. States with the Most Precipitation | 0 | - | 4.46 | 41,745 |
| Georgia ... or Georgia? | 0 | - | 4.67 | 76,873 |
| Flags of Oceania | 0 | - | 5.00 | 260,567 |
| The Only American Country ... | 0 | - | 4.92 | 121,822 |
| American Countries with the Shortest Names | 0 | - | 4.96 | 121,279 |
| U.S. State Border Crossings | 0 | - | 4.97 | 96,617 |
| U.S. Citizenship Test Questions | 0 | - | 4.83 | 239,762 |
| U.S. Cities with the Most International Tourists | 0 | - | 4.88 | 75,622 |
| Names of Generations | 0 | - | 4.09 | 45,199 |
| Cities and Towns of Massachusetts | 0 | - | 4.92 | 74,417 |
| Who Did that Motown Song? | 0 | - | 4.48 | 13,063 |
| Countries Larger Than Texas but With Fewer People | 0 | - | 4.92 | 40,033 |
| Regions of U.S. States | 0 | - | 4.37 | 43,988 |
| States, Provinces & Territories that Touch the Appalachian Mountains | 0 | - | 4.59 | 20,399 |
| 10 U.S. States with the Most Valuable Crops | 0 | - | 4.41 | 29,601 |
| U.S. States with the Lowest HDI | 0 | - | 4.47 | 28,877 |
| Which U.S. State - Multiple Choice | 0 | - | 4.48 | 20,322 |
| Movies by State | 0 | - | 4.27 | 40,566 |
| Canada Country Quiz | 0 | - | 4.54 | 132,678 |
| Canada Cities Map Quiz | 0 | - | 4.64 | 124,356 |
| Canada A-Z | 0 | - | 4.73 | 32,891 |
| Three Band Flags of Europe | 0 | - | 4.98 | 193,724 |
| Pixelated Europe Map | 0 | - | 4.88 | 122,996 |
| Pixelated Asia Map | 0 | - | 4.90 | 73,394 |
| Pixelated Africa Map | 0 | - | 4.98 | 100,073 |
| Top 10 Biggest Economies in the Americas | 0 | - | 4.94 | 92,388 |
| Mexico Country Quiz | 0 | - | 4.49 | 72,526 |
| All First-Level Subdivisions of South America on a Map | 0 | - | 4.92 | 54,181 |
| Brazil States Map Quiz | 0 | - | 4.86 | 48,254 |
| States of Brazil | 0 | - | 4.97 | 88,624 |
| Fictional Characters from the Midwest by Picture | 0 | - | 4.04 | 19,208 |
| U.S. States by Picture #2 | 0 | - | 3.47 | 11,569 |
| Most-Visited U.S. Cities | 0 | - | 4.85 | 94,222 |
| Every U.S. Metro Area on a Map | 0 | - | 4.97 | 82,047 |
| Senators Who Ran For President | 0 | - | 4.24 | 17,057 |
| U.S. Electoral College Landslides | 0 | - | 4.35 | 22,052 |
| Geography of California | 0 | - | 4.26 | 10,590 |
| California Pro Sport Teams | 0 | - | 4.19 | 22,697 |
| Chicago City Trivia | 0 | - | 4.31 | 31,476 |
| New York Pro Sport Teams | 0 | - | 4.32 | 25,923 |
| Texas Pro Sport Teams | 0 | - | 4.19 | 16,833 |
| History of Pennsylvania | 0 | - | 4.16 | 7,147 |
| History of Virginia | 0 | - | 4.31 | 11,614 |
| Events by U.S. State #1 | 0 | - | 4.43 | 22,929 |
| Most Valuable Crops by U.S. State | 0 | - | 4.40 | 39,141 |
| 10 U.S. States with the Highest Tax Burden | 0 | - | 4.26 | 38,275 |
| Top 10 U.S. States by Manufacturing Employment | 0 | - | 4.49 | 28,836 |
| U.S. States with the Most Venomous Snake Species | 0 | - | 4.47 | 26,446 |
| U.S. States with the Most Endangered Species | 0 | - | 4.50 | 14,376 |
| African-American Historical Figures | 0 | - | 4.18 | 17,237 |
| Canadian Prime Ministers | 0 | - | 4.63 | 57,646 |
| Capitals of Canadian Provinces | 0 | - | 4.85 | 89,259 |
| Flags of the Mediterranean | 0 | - | 4.94 | 148,832 |
