| Pixelated United States Map | 0 | - | 4.89 | 93,575 |
| US States Quiz | 0 | - | 5.00 | 16,718,736 |
| Name the U.S. National Parks | 0 | - | 4.86 | 59,206 |
| Total United States Immigration by Country | 0 | - | 4.91 | 110,734 |
| Most Common U.S. Last Names - Extreme | 0 | - | 4.94 | 173,300 |
| "Do Not Travel" Countries for U.S. Citizens | 0 | - | 4.97 | 241,221 |
| U.S. Cabinet Departments | 0 | - | 4.86 | 72,560 |
| Top 10 Non-English Languages Spoken in New York City | 0 | - | 4.84 | 65,687 |
| States of the U.S. in Alphabetical Order | 0 | - | 4.98 | 365,445 |
| All 3,143 Counties of the United States on a Map | 0 | - | 4.97 | 328,470 |
| Most-Visited Countries by Americans | 0 | - | 4.87 | 108,585 |
| Countries that Visit the United States the Most | 0 | - | 4.96 | 90,943 |
| Deadliest U.S. Wars | 0 | - | 4.89 | 189,392 |
| The 13 Colonies Quiz | 0 | - | 4.97 | 116,848 |
| U.S. States with the Letter Y | 0 | - | 4.85 | 110,467 |
| 10 Southernmost U.S. States | 0 | - | 4.88 | 112,510 |
| U.S. States with Short Names | 0 | - | 4.91 | 147,793 |
| U.S. States that Start with M | 0 | - | 4.93 | 186,055 |
| U.S. States By Population | 0 | - | 4.92 | 152,460 |
| U.S. States that Start with N | 0 | - | 4.95 | 170,514 |
| U.S. States with Longest Names | 0 | - | 4.84 | 43,931 |
| U.S. States with a Unique First Letter | 0 | - | 4.96 | 87,625 |
| 10 Westernmost U.S. States | 0 | - | 4.95 | 63,800 |
| The Only Remaining U.S. State . . . | 0 | - | 4.92 | 64,959 |
| US States with an Empty Map | 0 | - | 5.00 | 619,447 |
| Flags of North and South America | 0 | - | 4.99 | 368,051 |
| 10 Longest Rivers in the United States | 0 | - | 4.85 | 38,837 |
| Countries Closest to United States by Continent | 0 | - | 4.99 | 145,515 |
| Countries that Beat the United States | 0 | - | 4.93 | 165,698 |
| Louisiana Purchase with a Map | 0 | - | 4.96 | 47,690 |
| Top 10 Most-Visited U.S. States | 0 | - | 4.90 | 101,154 |
| U.S. States with the Most Immigrants | 0 | - | 4.85 | 81,984 |
| U.S. States or European Countries by Area | 0 | - | 4.95 | 94,847 |
| U.S. States or European Countries by Population | 0 | - | 4.97 | 132,059 |
| Name a Valid U.S. State #1 | 0 | - | 4.93 | 206,923 |
| Top 10 Coldest U.S. States | 0 | - | 4.94 | 123,969 |
| Top 10 Hottest U.S. States | 0 | - | 4.86 | 124,775 |
| Top 10 Most Native American U.S. States | 0 | - | 4.87 | 91,173 |
| Top 10 U.S. States with the Least Precipitation | 0 | - | 4.82 | 61,591 |
| 10 Closest Megacities to New York City | 0 | - | 4.52 | 67,209 |
| States of Mexico | 0 | - | 4.95 | 173,608 |
| Mexico States Map Quiz | 0 | - | 4.84 | 103,915 |
| U.S. State Nicknames Quiz | 0 | - | 4.47 | 50,300 |
| Countries with American Expatriates | 0 | - | 4.53 | 42,486 |
| United States Landmarks Map Quiz | 0 | - | 4.55 | 40,087 |
| U.S. Cities by Picture #1 | 0 | - | 4.37 | 34,376 |
| Cities by Picture #2 | 0 | - | 4.19 | 34,958 |
| United States Country Quiz | 0 | - | 4.43 | 100,703 |
| Busiest Air Routes from the U.S. | 0 | - | 4.46 | 76,633 |
| Famous People from California by Picture | 0 | - | 4.32 | 36,171 |
| California Groups of Things | 0 | - | 4.25 | 45,286 |
| Hawaiian Islands Map Quiz | 0 | - | 4.78 | 22,209 |
| New York Groups of Things | 0 | - | 4.38 | 59,963 |
| Countries Closest to Canada | 0 | - | 4.90 | 197,445 |
| Asian Countries Americans Travel to the Most | 0 | - | 4.75 | 59,681 |
| U.S. Geography by Letter - B | 0 | - | 4.53 | 68,756 |
| U.S. Geography by Letter - S | 0 | - | 4.54 | 52,261 |
| Two Letter U.S. State Abbreviations | 0 | - | 4.19 | 743,583 |
| Countries Closest to the U. S. | 0 | - | 4.41 | 207,995 |
| U.S. Federal Agency Acronyms | 0 | - | 4.50 | 79,766 |
| Top 10 Non-English Languages of Los Angeles | 0 | - | 4.42 | 59,626 |
| Movies Set in Miami | 0 | - | 4.32 | 16,678 |
| Who Did that Motown Song? | 0 | - | 4.48 | 13,023 |
| New England States | 0 | - | 4.51 | 59,715 |
| U.S. States by Land Area | 0 | - | 4.61 | 52,519 |
| Top 10 U.S. States by Inland Water Area | 0 | - | 4.53 | 37,895 |
| Add a Letter - Make a U.S. State | 0 | - | 4.72 | 82,373 |
| Top 10 Widest U.S. States East to West | 0 | - | 4.69 | 55,682 |
| Top 10 Tallest U.S. States North to South | 0 | - | 4.74 | 40,685 |
| U.S. States by Borders | 0 | - | 4.63 | 35,101 |
| 10 Easternmost U.S. States | 0 | - | 4.53 | 56,263 |
| The Only U.S. State ... #1 | 0 | - | 4.52 | 101,167 |
| 50 States, 50 Cities - Hard Version | 0 | - | 4.46 | 44,014 |
| Countries that Beat Canada | 0 | - | 4.90 | 86,919 |
| Asian Last Names in the United States | 0 | - | 4.43 | 46,535 |
| United States Map Quiz | 0 | - | 4.98 | 4,143,428 |
| U.S. States by Picture #1 | 0 | - | 4.21 | 15,368 |
| Countries Closest to Alaska | 0 | - | 4.93 | 123,402 |
| Geography of California | 0 | - | 4.25 | 10,509 |
| Countries Closest to Maine | 0 | - | 4.84 | 66,509 |
| New York Pro Sport Teams | 0 | - | 4.32 | 25,812 |
| Washington State by Picture | 0 | - | 4.26 | 7,688 |
| U.S. License Plates Picture Quiz | 0 | - | 4.59 | 52,686 |
| U.S. States with the Fewest Immigrants | 0 | - | 4.63 | 65,462 |
| U.S. States with the Highest Percentage of Farmland | 0 | - | 4.80 | 65,302 |
| U.S. States with the Lowest Percentage of Farmland | 0 | - | 4.74 | 55,047 |
| Walking Across U.S. State Borders with Hints | 0 | - | 4.74 | 34,936 |
| U.S. States with the Longest International Borders | 0 | - | 4.78 | 45,610 |
| Longest U.S. State Borders | 0 | - | 4.67 | 39,429 |
| Top 10 U.S. States with the Highest Elevation | 0 | - | 4.51 | 67,781 |
| U.S. States with the Lowest Average Elevation | 0 | - | 4.55 | 38,403 |
| U.S. States With the Highest Average Elevation | 0 | - | 4.61 | 32,676 |
| U.S. States with the Fewest Borders | 0 | - | 4.77 | 113,087 |
| U.S. States with the Most Borders | 0 | - | 4.53 | 62,236 |
| Flags of Africa Quiz | 0 | - | 5.00 | 464,133 |
| Belize Country Quiz | 0 | - | 4.85 | 20,824 |
| Top U.S. Universities | 0 | - | 4.15 | 144,189 |
| Largest United States Airlines | 0 | - | 4.39 | 54,855 |
| Third Most Common Language by U.S. State | 0 | - | 4.87 | 113,404 |
| U.S. States by Governor | 0 | - | 4.43 | 17,989 |
| U.S. Political Parties in History | 0 | - | 4.44 | 27,587 |
| U.S. Political Figures by Picture #1 | 0 | - | 4.14 | 26,080 |
| U.S. Political Figures by Picture #2 | 0 | - | 4.10 | 15,469 |
| Female Political Figures by Picture - U.S. | 0 | - | 4.20 | 10,814 |
| U.S. Government Agencies | 0 | - | 4.44 | 19,560 |
| Famous People from Alabama by Picture | 0 | - | 4.07 | 23,964 |
| Los Angeles vs. New York | 0 | - | 4.41 | 19,672 |
| Florida Pro Sport Teams | 0 | - | 4.61 | 11,768 |
| Hawaiian Islands | 0 | - | 4.83 | 42,451 |
| Famous People from Michigan by Picture | 0 | - | 4.30 | 21,303 |
| Famous People from New York by Picture | 0 | - | 4.03 | 27,370 |
| Famous People from Texas by Picture | 0 | - | 3.99 | 33,271 |
| U.S. States that Border Tennessee | 0 | - | 4.83 | 65,107 |
| Flags of Europe Quiz | 0 | - | 4.99 | 1,228,498 |
| Flags of Asia Quiz | 0 | - | 4.99 | 606,341 |
| Georgia ... or Georgia? | 0 | - | 4.69 | 76,457 |
| U.S. Geography by Letter - C | 0 | - | 4.27 | 73,524 |
| U.S. Geography by Letter - A | 0 | - | 4.38 | 62,500 |
| U.S. Geography by Letter - D | 0 | - | 4.08 | 56,498 |
| U.S. Geography by Letter - T | 0 | - | 4.28 | 49,172 |
| U.S. Geography by Letter - P | 0 | - | 4.35 | 47,581 |
| U.S. Geography by Letter - M | 0 | - | 4.14 | 52,762 |
| U.S. Geography by Letter - L | 0 | - | 4.04 | 40,564 |
| U.S. Geography by Letter - G | 0 | - | 4.13 | 38,747 |
| U.S. Geography By Letter - H | 0 | - | 4.35 | 39,504 |
| American Legal Vocabulary | 0 | - | 4.40 | 33,799 |
| 10 U.S. States With The Lowest Murder Rates | 0 | - | 4.51 | 40,574 |
| Biggest Trading Partners - United States | 0 | - | 4.63 | 106,385 |
| The U.S. Government - How Does it Work? | 0 | - | 4.34 | 42,193 |
| American Founding Fathers | 0 | - | 4.41 | 23,083 |
| Musical Acts from Los Angeles by Two Songs | 0 | - | 4.27 | 15,873 |
| Movies Set in San Francisco | 0 | - | 4.23 | 19,910 |
| Famous People from Florida by Picture | 0 | - | 3.86 | 19,679 |
| State Quiz - Florida | 0 | - | 4.47 | 61,981 |
| Boston Talk to English Translation Quiz | 0 | - | 4.59 | 55,719 |
| People on Money - United States | 0 | - | 4.31 | 63,219 |
| U.S. History Groups of Two | 0 | - | 4.23 | 44,269 |
| 100 Most Influential Figures in U.S. History | 0 | - | 4.20 | 44,752 |
| Last 10 U.S. States Alphabetically | 0 | - | 4.35 | 74,634 |
| Top 10 Least Populous U.S. State Capitals | 0 | - | 4.52 | 21,469 |
| 10 U.S. States With The Highest Murder Rates | 0 | - | 4.46 | 52,763 |
| Flyover States | 0 | - | 4.52 | 29,410 |
| U.S. States With Double Letters | 0 | - | 4.54 | 23,946 |
| U.S. States Bigger than Their Neighbors | 0 | - | 4.27 | 75,853 |
| U.S. States by Wikipedia Descriptions #1 | 0 | - | 4.57 | 39,213 |
| U.S. States by Wikipedia Descriptions #2 | 0 | - | 4.47 | 36,988 |
| States and Provinces that touch the Rocky Mountains | 0 | - | 4.42 | 32,424 |
| Name a Valid U.S. State #2 | 0 | - | 4.63 | 76,537 |
| Name a Valid U.S. State #3 | 0 | - | 4.78 | 48,734 |
| U.S. State Superlatives #1 | 0 | - | 4.47 | 87,297 |
| U.S. State Superlatives #2 | 0 | - | 4.53 | 40,492 |
| 50 States, 50 Cities - Easy Version | 0 | - | 4.39 | 128,027 |
| Top 10 U.S. States With the Most Tornadoes | 0 | - | 4.53 | 64,470 |
| Top 10 Richest U.S. States by Median Income | 0 | - | 4.47 | 118,593 |
| Top 10 Least Religious U.S. States | 0 | - | 4.51 | 34,116 |
| Top 10 Least-Forested U.S. States | 0 | - | 4.50 | 46,343 |
| Top 10 U.S. States by Public Transit | 0 | - | 4.77 | 63,448 |
| Top 10 U.S. States with the Most Precipitation | 0 | - | 4.46 | 41,583 |
| Pixelated Africa Map | 0 | - | 4.98 | 99,155 |
| Flags of Oceania | 0 | - | 5.00 | 255,667 |
| The Only American Country ... | 0 | - | 4.92 | 120,841 |
| American Countries with the Shortest Names | 0 | - | 4.96 | 120,414 |
| U.S. State Border Crossings | 0 | - | 4.97 | 96,013 |
| U.S. Citizenship Test Questions | 0 | - | 4.83 | 238,449 |
| U.S. Cities with the Most International Tourists | 0 | - | 4.88 | 74,936 |
| History of Florida | 0 | - | 4.45 | 9,771 |
| Cities and Towns of Massachusetts | 0 | - | 4.92 | 73,132 |
| Countries Larger Than Texas but With Fewer People | 0 | - | 4.92 | 39,547 |
| Regions of U.S. States | 0 | - | 4.37 | 43,513 |
| States, Provinces & Territories that Touch the Appalachian Mountains | 0 | - | 4.59 | 20,344 |
| 10 U.S. States with the Most Valuable Crops | 0 | - | 4.41 | 29,500 |
| U.S. States with the Lowest HDI | 0 | - | 4.46 | 28,773 |
| Which U.S. State - Multiple Choice | 0 | - | 4.48 | 20,206 |
| Movies by State | 0 | - | 4.27 | 40,453 |
| Canada Country Quiz | 0 | - | 4.55 | 131,813 |
| Canada Cities Map Quiz | 0 | - | 4.63 | 123,687 |
| Canada A-Z | 0 | - | 4.73 | 32,668 |
| Three Band Flags of Europe | 0 | - | 4.98 | 192,012 |
| Pixelated Europe Map | 0 | - | 4.88 | 121,903 |
| Pixelated Asia Map | 0 | - | 4.90 | 72,506 |
| Top 10 Biggest Economies in the Americas | 0 | - | 4.93 | 91,155 |
| Mexico Country Quiz | 0 | - | 4.49 | 72,028 |
| Mexico Cities Map Quiz | 0 | - | 4.77 | 33,325 |
| All First-Level Subdivisions of South America on a Map | 0 | - | 4.92 | 53,068 |
| Brazil States Map Quiz | 0 | - | 4.85 | 47,449 |
| States of Brazil | 0 | - | 4.98 | 86,544 |
| Fictional Characters from the Midwest by Picture | 0 | - | 4.04 | 19,161 |
| U.S. States by Picture #2 | 0 | - | 3.47 | 11,514 |
| Most-Visited U.S. Cities | 0 | - | 4.85 | 92,527 |
| Every U.S. Metro Area on a Map | 0 | - | 4.97 | 80,871 |
| Senators Who Ran For President | 0 | - | 4.24 | 16,997 |
| U.S. Electoral College Landslides | 0 | - | 4.35 | 21,986 |
| California Pro Sport Teams | 0 | - | 4.19 | 22,652 |
| Chicago City Trivia | 0 | - | 4.31 | 31,385 |
| Texas Pro Sport Teams | 0 | - | 4.19 | 16,783 |
| History of Pennsylvania | 0 | - | 4.16 | 7,093 |
| History of Virginia | 0 | - | 4.31 | 11,560 |
| Washington D.C. by Picture | 0 | - | 4.49 | 26,662 |
| Events in U.S. History | 0 | - | 4.40 | 28,503 |
| Events by U.S. State #1 | 0 | - | 4.43 | 22,841 |
