| Pixelated United States Map | 0 | - | 4.88 | 94,415 |
| US States Quiz | 0 | - | 5.00 | 16,907,822 |
| Name the U.S. National Parks | 0 | - | 4.86 | 60,067 |
| Total United States Immigration by Country | 0 | - | 4.91 | 111,817 |
| Most Common U.S. Last Names - Extreme | 0 | - | 4.94 | 174,767 |
| "Do Not Travel" Countries for U.S. Citizens | 0 | - | 4.97 | 244,654 |
| U.S. Cabinet Departments | 0 | - | 4.86 | 72,924 |
| Top 10 Non-English Languages Spoken in New York City | 0 | - | 4.85 | 66,347 |
| States of the U.S. in Alphabetical Order | 0 | - | 4.98 | 367,487 |
| All 3,143 Counties of the United States on a Map | 0 | - | 4.97 | 332,865 |
| Most-Visited Countries by Americans | 0 | - | 4.86 | 109,883 |
| Countries that Visit the United States the Most | 0 | - | 4.96 | 91,944 |
| Deadliest U.S. Wars | 0 | - | 4.89 | 191,009 |
| The 13 Colonies Quiz | 0 | - | 4.97 | 118,085 |
| U.S. States with the Letter Y | 0 | - | 4.85 | 111,643 |
| 10 Southernmost U.S. States | 0 | - | 4.89 | 113,616 |
| U.S. States with Short Names | 0 | - | 4.91 | 149,249 |
| U.S. States that Start with M | 0 | - | 4.93 | 187,556 |
| U.S. States By Population | 0 | - | 4.92 | 153,690 |
| U.S. States that Start with N | 0 | - | 4.95 | 171,645 |
| U.S. States with Longest Names | 0 | - | 4.84 | 44,555 |
| U.S. States with a Unique First Letter | 0 | - | 4.96 | 88,453 |
| 10 Westernmost U.S. States | 0 | - | 4.95 | 64,304 |
| The Only Remaining U.S. State . . . | 0 | - | 4.93 | 65,752 |
| US States with an Empty Map | 0 | - | 5.00 | 625,680 |
| Flags of North and South America | 0 | - | 4.99 | 374,014 |
| 10 Longest Rivers in the United States | 0 | - | 4.85 | 39,217 |
| Countries Closest to United States by Continent | 0 | - | 4.99 | 146,629 |
| Countries that Beat the United States | 0 | - | 4.93 | 167,752 |
| Louisiana Purchase with a Map | 0 | - | 4.96 | 48,790 |
| Top 10 Most-Visited U.S. States | 0 | - | 4.90 | 101,896 |
| U.S. States with the Most Immigrants | 0 | - | 4.85 | 82,583 |
| U.S. States or European Countries by Area | 0 | - | 4.95 | 96,299 |
| U.S. States or European Countries by Population | 0 | - | 4.97 | 133,429 |
| Name a Valid U.S. State #1 | 0 | - | 4.93 | 209,347 |
| Top 10 Coldest U.S. States | 0 | - | 4.94 | 125,238 |
| Top 10 Hottest U.S. States | 0 | - | 4.86 | 125,876 |
| Top 10 Most Native American U.S. States | 0 | - | 4.87 | 92,279 |
| Top 10 U.S. States with the Least Precipitation | 0 | - | 4.82 | 61,976 |
| 10 Closest Megacities to New York City | 0 | - | 4.52 | 67,386 |
| States of Mexico | 0 | - | 4.96 | 176,610 |
| Mexico States Map Quiz | 0 | - | 4.84 | 104,934 |
| Midwestern States of the U.S. | 0 | - | 4.88 | 13,883 |
| Mexico Cities Map Quiz | 0 | - | 4.83 | 38,636 |
| U.S. State Nicknames | 0 | - | 4.47 | 50,581 |
| Countries with American Expatriates | 0 | - | 4.53 | 42,604 |
| United States Landmarks Map Quiz | 0 | - | 4.55 | 40,205 |
| U.S. Cities by Picture #1 | 0 | - | 4.36 | 34,604 |
| Cities by Picture #2 | 0 | - | 4.19 | 35,174 |
| United States Country Quiz | 0 | - | 4.43 | 101,668 |
| Busiest Air Routes from the U.S. | 0 | - | 4.46 | 76,931 |
| Famous People from California by Picture | 0 | - | 4.32 | 36,516 |
| California Groups of Things | 0 | - | 4.25 | 45,516 |
| Hawaiian Islands Map Quiz | 0 | - | 4.78 | 22,291 |
| New York Groups of Things | 0 | - | 4.35 | 63,881 |
| Most-Visited Countries by Canadians | 0 | - | 4.82 | 39,438 |
| Countries Closest to Canada | 0 | - | 4.91 | 198,528 |
| Asian Countries Americans Travel to the Most | 0 | - | 4.75 | 60,044 |
| U.S. Geography by Letter - B | 0 | - | 4.53 | 69,490 |
| U.S. Geography by Letter - S | 0 | - | 4.55 | 52,920 |
| Two Letter U.S. State Abbreviations | 0 | - | 4.19 | 747,803 |
| Countries Closest to the U. S. | 0 | - | 4.41 | 209,741 |
| U.S. Federal Agency Acronyms | 0 | - | 4.50 | 80,022 |
| Top 10 Non-English Languages of Los Angeles | 0 | - | 4.43 | 59,943 |
| Movies Set in Miami | 0 | - | 4.32 | 16,704 |
| Who Did that Motown Song? | 0 | - | 4.48 | 13,061 |
| New England States | 0 | - | 4.51 | 59,829 |
| U.S. States by Land Area | 0 | - | 4.61 | 52,872 |
| Top 10 U.S. States by Inland Water Area | 0 | - | 4.53 | 38,029 |
| Add a Letter - Make a U.S. State | 0 | - | 4.70 | 82,885 |
| Top 10 Widest U.S. States East to West | 0 | - | 4.70 | 56,088 |
| Top 10 Tallest U.S. States North to South | 0 | - | 4.74 | 40,991 |
| U.S. States by Borders | 0 | - | 4.61 | 35,363 |
| 10 Easternmost U.S. States | 0 | - | 4.53 | 56,530 |
| The Only U.S. State ... #1 | 0 | - | 4.52 | 102,127 |
| 50 States, 50 Cities - Hard Version | 0 | - | 4.46 | 44,261 |
| Countries that Beat Canada | 0 | - | 4.91 | 98,383 |
| Asian Last Names in the United States | 0 | - | 4.43 | 46,821 |
| United States Map Quiz | 0 | - | 4.98 | 4,162,495 |
| U.S. States by Picture #1 | 0 | - | 4.21 | 15,461 |
| Countries Closest to Alaska | 0 | - | 4.93 | 124,520 |
| Geography of California | 0 | - | 4.26 | 10,579 |
| Countries Closest to Maine | 0 | - | 4.85 | 67,229 |
| New York Pro Sport Teams | 0 | - | 4.32 | 25,917 |
| Washington State by Picture | 0 | - | 4.26 | 7,734 |
| U.S. License Plates Picture Quiz | 0 | - | 4.61 | 52,979 |
| U.S. States with the Fewest Immigrants | 0 | - | 4.63 | 65,867 |
| U.S. States with the Highest Percentage of Farmland | 0 | - | 4.80 | 65,522 |
| U.S. States with the Lowest Percentage of Farmland | 0 | - | 4.74 | 55,232 |
| Walking Across U.S. State Borders with Hints | 0 | - | 4.74 | 35,068 |
| U.S. States with the Longest International Borders | 0 | - | 4.78 | 45,833 |
| Longest U.S. State Borders | 0 | - | 4.67 | 39,901 |
| Top 10 U.S. States with the Highest Elevation | 0 | - | 4.51 | 67,902 |
| U.S. States with the Lowest Average Elevation | 0 | - | 4.55 | 38,522 |
| U.S. States With the Highest Average Elevation | 0 | - | 4.61 | 32,790 |
| U.S. States with the Fewest Borders | 0 | - | 4.78 | 113,959 |
| U.S. States with the Most Borders | 0 | - | 4.53 | 62,322 |
| Flags of Africa Quiz | 0 | - | 5.00 | 472,708 |
| Belize Country Quiz | 0 | - | 4.85 | 21,008 |
| Top U.S. Universities | 0 | - | 4.15 | 145,315 |
| Largest United States Airlines | 0 | - | 4.39 | 55,065 |
| Third Most Common Language by U.S. State | 0 | - | 4.87 | 113,790 |
| U.S. States by Governor | 0 | - | 4.43 | 18,077 |
| U.S. Political Parties in History | 0 | - | 4.44 | 27,713 |
| U.S. Political Figures by Picture #1 | 0 | - | 4.14 | 26,178 |
| U.S. Political Figures by Picture #2 | 0 | - | 4.10 | 15,539 |
| Female Political Figures by Picture - U.S. | 0 | - | 4.22 | 10,874 |
| U.S. Government Agencies | 0 | - | 4.44 | 19,703 |
| Famous People from Alabama by Picture | 0 | - | 4.07 | 24,083 |
| Los Angeles vs. New York | 0 | - | 4.41 | 19,915 |
| Florida Pro Sport Teams | 0 | - | 4.61 | 11,862 |
| Hawaiian Islands | 0 | - | 4.83 | 42,762 |
| Famous People from Michigan by Picture | 0 | - | 4.30 | 21,421 |
| Famous People from New York by Picture | 0 | - | 4.03 | 27,516 |
| Famous People from Texas by Picture | 0 | - | 3.99 | 33,392 |
| U.S. States that Border Tennessee | 0 | - | 4.83 | 65,365 |
| Events in U.S. History | 0 | - | 4.41 | 28,701 |
| Flags of Europe Quiz | 0 | - | 4.99 | 1,247,483 |
| Flags of Asia Quiz | 0 | - | 4.99 | 615,403 |
| Georgia ... or Georgia? | 0 | - | 4.67 | 76,844 |
| U.S. Geography by Letter - C | 0 | - | 4.27 | 74,144 |
| U.S. Geography by Letter - A | 0 | - | 4.37 | 63,161 |
| U.S. Geography by Letter - D | 0 | - | 4.09 | 57,149 |
| U.S. Geography by Letter - T | 0 | - | 4.29 | 49,846 |
| U.S. Geography by Letter - P | 0 | - | 4.38 | 53,986 |
| U.S. Geography by Letter - M | 0 | - | 4.14 | 53,368 |
| U.S. Geography by Letter - L | 0 | - | 4.04 | 41,208 |
| U.S. Geography by Letter - G | 0 | - | 4.13 | 39,373 |
| U.S. Geography By Letter - H | 0 | - | 4.35 | 40,224 |
| American Legal Vocabulary | 0 | - | 4.40 | 33,946 |
| 10 U.S. States With The Lowest Murder Rates | 0 | - | 4.48 | 51,838 |
| Biggest Trading Partners - United States | 0 | - | 4.63 | 106,706 |
| The U.S. Government - How Does it Work? | 0 | - | 4.34 | 42,387 |
| American Founding Fathers | 0 | - | 4.42 | 23,234 |
| Musical Acts from Los Angeles by Two Songs | 0 | - | 4.27 | 16,156 |
| Movies Set in San Francisco | 0 | - | 4.23 | 19,943 |
| Famous People from Florida by Picture | 0 | - | 3.86 | 19,777 |
| State Quiz - Florida | 0 | - | 4.47 | 62,406 |
| People on Money - United States | 0 | - | 4.31 | 63,365 |
| U.S. History Groups of Two | 0 | - | 4.23 | 44,497 |
| 100 Most Influential Figures in U.S. History | 0 | - | 4.20 | 45,108 |
| Last 10 U.S. States Alphabetically | 0 | - | 4.35 | 74,906 |
| Top 10 Least Populous U.S. State Capitals | 0 | - | 4.52 | 21,536 |
| 10 U.S. States With The Highest Murder Rates | 0 | - | 4.47 | 54,485 |
| Flyover States | 0 | - | 4.52 | 29,530 |
| U.S. States With Double Letters | 0 | - | 4.55 | 24,154 |
| U.S. States Bigger than Their Neighbors | 0 | - | 4.28 | 76,238 |
| U.S. States by Wikipedia Descriptions #1 | 0 | - | 4.57 | 39,373 |
| U.S. States by Wikipedia Descriptions #2 | 0 | - | 4.48 | 37,126 |
| States and Provinces that touch the Rocky Mountains | 0 | - | 4.43 | 32,512 |
| Name a Valid U.S. State #2 | 0 | - | 4.63 | 77,122 |
| Name a Valid U.S. State #3 | 0 | - | 4.78 | 49,082 |
| U.S. State Superlatives #1 | 0 | - | 4.47 | 87,567 |
| U.S. State Superlatives #2 | 0 | - | 4.53 | 40,664 |
| 50 States, 50 Cities - Easy Version | 0 | - | 4.39 | 128,461 |
| Top 10 U.S. States With the Most Tornadoes | 0 | - | 4.53 | 64,829 |
| Top 10 Richest U.S. States by Median Income | 0 | - | 4.47 | 119,159 |
| Top 10 Least Religious U.S. States | 0 | - | 4.51 | 34,340 |
| Top 10 Least-Forested U.S. States | 0 | - | 4.50 | 46,556 |
| Top 10 U.S. States by Public Transit | 0 | - | 4.77 | 63,835 |
| Top 10 U.S. States with the Most Precipitation | 0 | - | 4.46 | 41,729 |
| Pixelated Africa Map | 0 | - | 4.98 | 100,004 |
| Flags of Oceania | 0 | - | 5.00 | 260,255 |
| The Only American Country ... | 0 | - | 4.92 | 121,774 |
| American Countries with the Shortest Names | 0 | - | 4.96 | 121,243 |
| U.S. State Border Crossings | 0 | - | 4.97 | 96,574 |
| U.S. Citizenship Test Questions | 0 | - | 4.83 | 239,683 |
| U.S. Cities with the Most International Tourists | 0 | - | 4.88 | 75,577 |
| Names of Generations | 0 | - | 4.09 | 45,131 |
| History of Florida | 0 | - | 4.45 | 9,839 |
| Cities and Towns of Massachusetts | 0 | - | 4.93 | 74,314 |
| Countries Larger Than Texas but With Fewer People | 0 | - | 4.92 | 40,016 |
| Regions of U.S. States | 0 | - | 4.37 | 43,957 |
| 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 | 29,594 |
| U.S. States with the Lowest HDI | 0 | - | 4.47 | 28,870 |
| Which U.S. State - Multiple Choice | 0 | - | 4.48 | 20,316 |
| Movies by State | 0 | - | 4.27 | 40,559 |
| Canada Country Quiz | 0 | - | 4.54 | 132,626 |
| Canada Cities Map Quiz | 0 | - | 4.64 | 124,308 |
| Canada A-Z | 0 | - | 4.73 | 32,879 |
| Three Band Flags of Europe | 0 | - | 4.98 | 193,614 |
| Pixelated Europe Map | 0 | - | 4.88 | 122,945 |
| Pixelated Asia Map | 0 | - | 4.90 | 73,355 |
| Top 10 Biggest Economies in the Americas | 0 | - | 4.94 | 92,333 |
| Mexico Country Quiz | 0 | - | 4.49 | 72,503 |
| All First-Level Subdivisions of South America on a Map | 0 | - | 4.92 | 54,126 |
| Brazil States Map Quiz | 0 | - | 4.86 | 48,217 |
| States of Brazil | 0 | - | 4.97 | 88,500 |
| Fictional Characters from the Midwest by Picture | 0 | - | 4.04 | 19,207 |
| U.S. States by Picture #2 | 0 | - | 3.47 | 11,563 |
| Most-Visited U.S. Cities | 0 | - | 4.85 | 94,128 |
| Every U.S. Metro Area on a Map | 0 | - | 4.97 | 81,956 |
| Senators Who Ran For President | 0 | - | 4.24 | 17,055 |
| U.S. Electoral College Landslides | 0 | - | 4.35 | 22,049 |
| California Pro Sport Teams | 0 | - | 4.19 | 22,696 |
| Chicago City Trivia | 0 | - | 4.31 | 31,470 |
| Texas Pro Sport Teams | 0 | - | 4.19 | 16,829 |
| History of Pennsylvania | 0 | - | 4.16 | 7,142 |
| History of Virginia | 0 | - | 4.31 | 11,608 |
