| Pixelated United States Map | 0 | - | 4.88 | 94,718 |
| US States Quiz | 0 | - | 5.00 | 16,972,173 |
| Name the U.S. National Parks | 0 | - | 4.86 | 60,394 |
| Total United States Immigration by Country | 0 | - | 4.91 | 112,237 |
| Most Common U.S. Last Names - Extreme | 0 | - | 4.94 | 175,372 |
| "Do Not Travel" Countries for U.S. Citizens | 0 | - | 4.97 | 246,005 |
| U.S. Cabinet Departments | 0 | - | 4.86 | 73,062 |
| Top 10 Non-English Languages Spoken in New York City | 0 | - | 4.85 | 66,634 |
| States of the U.S. in Alphabetical Order | 0 | - | 4.98 | 368,397 |
| All 3,143 Counties of the United States on a Map | 0 | - | 4.97 | 334,857 |
| 10 Closest Megacities to New York City | 0 | - | 4.52 | 67,510 |
| Most-Visited Countries by Americans | 0 | - | 4.86 | 110,370 |
| Countries that Visit the United States the Most | 0 | - | 4.96 | 92,321 |
| Deadliest U.S. Wars | 0 | - | 4.89 | 191,626 |
| The 13 Colonies Quiz | 0 | - | 4.97 | 118,908 |
| U.S. States with the Letter Y | 0 | - | 4.86 | 112,134 |
| 10 Southernmost U.S. States | 0 | - | 4.89 | 114,137 |
| U.S. States with Short Names | 0 | - | 4.91 | 150,192 |
| U.S. States that Start with M | 0 | - | 4.93 | 188,169 |
| U.S. States By Population | 0 | - | 4.92 | 154,042 |
| U.S. States that Start with N | 0 | - | 4.95 | 172,086 |
| U.S. States with Longest Names | 0 | - | 4.85 | 44,809 |
| U.S. States with a Unique First Letter | 0 | - | 4.96 | 88,772 |
| 10 Westernmost U.S. States | 0 | - | 4.95 | 64,483 |
| The Only Remaining U.S. State . . . | 0 | - | 4.93 | 66,005 |
| US States with an Empty Map | 0 | - | 5.00 | 627,850 |
| Flags of North and South America | 0 | - | 4.99 | 376,205 |
| 10 Longest Rivers in the United States | 0 | - | 4.85 | 39,353 |
| Countries Closest to United States by Continent | 0 | - | 4.99 | 147,056 |
| Countries that Beat the United States | 0 | - | 4.93 | 168,450 |
| Louisiana Purchase with a Map | 0 | - | 4.96 | 49,170 |
| Top 10 Most-Visited U.S. States | 0 | - | 4.90 | 102,343 |
| U.S. States with the Most Immigrants | 0 | - | 4.85 | 82,956 |
| U.S. States or European Countries by Area | 0 | - | 4.95 | 96,877 |
| U.S. States or European Countries by Population | 0 | - | 4.97 | 133,990 |
| Name a Valid U.S. State #1 | 0 | - | 4.93 | 210,311 |
| Top 10 Coldest U.S. States | 0 | - | 4.94 | 125,744 |
| Top 10 Hottest U.S. States | 0 | - | 4.86 | 126,356 |
| Top 10 Most Native American U.S. States | 0 | - | 4.87 | 92,703 |
| Top 10 U.S. States with the Least Precipitation | 0 | - | 4.83 | 62,166 |
| States of Mexico | 0 | - | 4.96 | 177,826 |
| Mexico States Map Quiz | 0 | - | 4.84 | 105,492 |
| Midwestern States of the U.S. | 0 | - | 4.88 | 14,087 |
| Mexico Cities Map Quiz | 0 | - | 4.83 | 38,779 |
| U.S. State Nicknames | 0 | - | 4.47 | 50,695 |
| Countries with American Expatriates | 0 | - | 4.53 | 42,656 |
| United States Landmarks Map Quiz | 0 | - | 4.55 | 40,265 |
| U.S. Cities by Picture #1 | 0 | - | 4.36 | 34,702 |
| Cities by Picture #2 | 0 | - | 4.19 | 35,271 |
| United States Country Quiz | 0 | - | 4.43 | 102,077 |
| Busiest Air Routes from the U.S. | 0 | - | 4.46 | 77,035 |
| Famous People from California by Picture | 0 | - | 4.32 | 36,663 |
| California Groups of Things | 0 | - | 4.26 | 45,731 |
| Los Angeles vs. New York | 0 | - | 4.41 | 19,999 |
| Hawaiian Islands Map Quiz | 0 | - | 4.78 | 22,312 |
| Famous People from New York by Picture | 0 | - | 4.03 | 27,588 |
| New York Groups of Things | 0 | - | 4.39 | 71,796 |
| Most-Visited Countries by Canadians | 0 | - | 4.83 | 39,572 |
| Countries Closest to Canada | 0 | - | 4.91 | 198,966 |
| Asian Countries Americans Travel to the Most | 0 | - | 4.75 | 60,168 |
| U.S. Geography by Letter - B | 0 | - | 4.53 | 69,849 |
| U.S. Geography by Letter - S | 0 | - | 4.55 | 53,280 |
| Two Letter U.S. State Abbreviations | 0 | - | 4.19 | 749,210 |
| Countries Closest to the U. S. | 0 | - | 4.41 | 210,328 |
| U.S. Federal Agency Acronyms | 0 | - | 4.50 | 80,108 |
| Top 10 Non-English Languages of Los Angeles | 0 | - | 4.43 | 60,077 |
| Who Did that Motown Song? | 0 | - | 4.48 | 13,072 |
| New England States | 0 | - | 4.51 | 59,884 |
| U.S. States by Land Area | 0 | - | 4.55 | 53,019 |
| Top 10 U.S. States by Inland Water Area | 0 | - | 4.53 | 38,101 |
| Add a Letter - Make a U.S. State | 0 | - | 4.70 | 83,069 |
| Top 10 Widest U.S. States East to West | 0 | - | 4.70 | 56,245 |
| Top 10 Tallest U.S. States North to South | 0 | - | 4.75 | 41,103 |
| U.S. States by Borders | 0 | - | 4.62 | 35,446 |
| 10 Easternmost U.S. States | 0 | - | 4.53 | 56,659 |
| The Only U.S. State ... #1 | 0 | - | 4.52 | 102,289 |
| 50 States, 50 Cities - Hard Version | 0 | - | 4.46 | 44,412 |
| Countries that Beat Canada | 0 | - | 4.91 | 98,878 |
| Asian Last Names in the United States | 0 | - | 4.43 | 46,936 |
| United States Map Quiz | 0 | - | 4.98 | 4,168,914 |
| U.S. States by Picture #1 | 0 | - | 4.21 | 15,498 |
| Countries Closest to Alaska | 0 | - | 4.93 | 124,983 |
| Geography of California | 0 | - | 4.26 | 10,612 |
| Countries Closest to Maine | 0 | - | 4.85 | 67,501 |
| Boroughs of New York City | 0 | - | 4.47 | 84,895 |
| New York Pro Sport Teams | 0 | - | 4.32 | 25,950 |
| Washington State by Picture | 0 | - | 4.26 | 7,750 |
| U.S. License Plates Picture Quiz | 0 | - | 4.61 | 53,102 |
| U.S. States with the Fewest Immigrants | 0 | - | 4.64 | 66,038 |
| U.S. States with the Highest Percentage of Farmland | 0 | - | 4.80 | 65,600 |
| U.S. States with the Lowest Percentage of Farmland | 0 | - | 4.74 | 55,313 |
| Walking Across U.S. State Borders with Hints | 0 | - | 4.74 | 35,113 |
| U.S. States with the Longest International Borders | 0 | - | 4.78 | 45,910 |
| Longest U.S. State Borders | 0 | - | 4.69 | 40,072 |
| Top 10 U.S. States with the Highest Elevation | 0 | - | 4.51 | 67,960 |
| U.S. States with the Lowest Average Elevation | 0 | - | 4.55 | 38,560 |
| U.S. States With the Highest Average Elevation | 0 | - | 4.61 | 32,827 |
| U.S. States with the Fewest Borders | 0 | - | 4.78 | 114,153 |
| U.S. States with the Most Borders | 0 | - | 4.53 | 62,355 |
| Belize Country Quiz | 0 | - | 4.85 | 21,066 |
| Top U.S. Universities | 0 | - | 4.15 | 145,687 |
| Largest United States Airlines | 0 | - | 4.39 | 55,134 |
| Third Most Common Language by U.S. State | 0 | - | 4.87 | 113,939 |
| U.S. States by Governor | 0 | - | 4.43 | 18,109 |
| U.S. Political Parties in History | 0 | - | 4.44 | 27,753 |
| U.S. Political Figures by Picture #1 | 0 | - | 4.14 | 26,209 |
| U.S. Political Figures by Picture #2 | 0 | - | 4.10 | 15,557 |
| Female Political Figures by Picture - U.S. | 0 | - | 4.22 | 10,896 |
| U.S. Government Agencies | 0 | - | 4.44 | 19,760 |
| Famous People from Alabama by Picture | 0 | - | 4.07 | 24,119 |
| Florida Pro Sport Teams | 0 | - | 4.61 | 11,899 |
| Hawaiian Islands | 0 | - | 4.83 | 42,893 |
| Famous People from Michigan by Picture | 0 | - | 4.30 | 21,475 |
| Famous People from Texas by Picture | 0 | - | 3.99 | 33,440 |
| U.S. States that Border Tennessee | 0 | - | 4.83 | 65,476 |
| Events in U.S. History | 0 | - | 4.41 | 28,793 |
| Flags of Europe Quiz | 0 | - | 4.99 | 1,254,967 |
| Flags of Asia Quiz | 0 | - | 4.99 | 618,813 |
| Flags of Africa Quiz | 0 | - | 5.00 | 476,292 |
| U.S. Geography by Letter - C | 0 | - | 4.27 | 74,443 |
| U.S. Geography by Letter - A | 0 | - | 4.37 | 63,475 |
| U.S. Geography by Letter - D | 0 | - | 4.09 | 57,454 |
| U.S. Geography by Letter - T | 0 | - | 4.29 | 50,166 |
| U.S. Geography by Letter - P | 0 | - | 4.38 | 54,350 |
| U.S. Geography by Letter - M | 0 | - | 4.14 | 53,588 |
| U.S. Geography by Letter - L | 0 | - | 4.04 | 41,480 |
| U.S. Geography by Letter - G | 0 | - | 4.13 | 39,644 |
| U.S. Geography by Letter - R | 0 | - | 4.22 | 36,790 |
| U.S. Geography By Letter - H | 0 | - | 4.35 | 40,543 |
| American Legal Vocabulary | 0 | - | 4.40 | 34,001 |
| 10 U.S. States With The Lowest Murder Rates | 0 | - | 4.48 | 52,847 |
| Biggest Trading Partners - United States | 0 | - | 4.63 | 106,842 |
| The U.S. Government - How Does it Work? | 0 | - | 4.34 | 42,449 |
| American Founding Fathers | 0 | - | 4.42 | 23,268 |
| Musical Acts from Los Angeles by Two Songs | 0 | - | 4.27 | 16,271 |
| Movies Set in San Francisco | 0 | - | 4.23 | 19,955 |
| Movies Set in Miami | 0 | - | 4.32 | 16,711 |
| Musical Acts from New York City | 0 | - | 3.80 | 10,190 |
| State Quiz - New York | 0 | - | 4.52 | 46,359 |
| People on Money - United States | 0 | - | 4.31 | 63,417 |
| U.S. History Groups of Two | 0 | - | 4.23 | 44,570 |
| 100 Most Influential Figures in U.S. History | 0 | - | 4.20 | 45,185 |
| Last 10 U.S. States Alphabetically | 0 | - | 4.35 | 75,023 |
| Top 10 Least Populous U.S. State Capitals | 0 | - | 4.52 | 21,558 |
| 10 U.S. States With The Highest Murder Rates | 0 | - | 4.47 | 54,752 |
| Flyover States | 0 | - | 4.52 | 29,580 |
| U.S. States With Double Letters | 0 | - | 4.55 | 24,234 |
| U.S. States Bigger than Their Neighbors | 0 | - | 4.28 | 76,366 |
| U.S. States by Wikipedia Descriptions #1 | 0 | - | 4.57 | 39,443 |
| U.S. States by Wikipedia Descriptions #2 | 0 | - | 4.48 | 37,172 |
| States and Provinces that touch the Rocky Mountains | 0 | - | 4.43 | 32,553 |
| Name a Valid U.S. State #2 | 0 | - | 4.63 | 77,335 |
| Name a Valid U.S. State #3 | 0 | - | 4.78 | 49,240 |
| U.S. State Superlatives #1 | 0 | - | 4.47 | 87,650 |
| U.S. State Superlatives #2 | 0 | - | 4.53 | 40,738 |
| 50 States, 50 Cities - Easy Version | 0 | - | 4.39 | 128,911 |
| Top 10 U.S. States With the Most Tornadoes | 0 | - | 4.53 | 64,955 |
| Top 10 Richest U.S. States by Median Income | 0 | - | 4.46 | 119,292 |
| Top 10 Least Religious U.S. States | 0 | - | 4.51 | 34,411 |
| Top 10 Least-Forested U.S. States | 0 | - | 4.50 | 46,650 |
| Top 10 U.S. States by Public Transit | 0 | - | 4.74 | 63,978 |
| Top 10 U.S. States with the Most Precipitation | 0 | - | 4.46 | 41,805 |
| Georgia ... or Georgia? | 0 | - | 4.67 | 76,987 |
| Flags of Oceania | 0 | - | 5.00 | 262,113 |
| The Only American Country ... | 0 | - | 4.92 | 122,108 |
| American Countries with the Shortest Names | 0 | - | 4.96 | 121,564 |
| U.S. State Border Crossings | 0 | - | 4.97 | 96,808 |
| U.S. Citizenship Test Questions | 0 | - | 4.83 | 240,679 |
| U.S. Cities with the Most International Tourists | 0 | - | 4.88 | 75,851 |
| Names of Generations | 0 | - | 4.09 | 45,434 |
| Cities and Towns of Massachusetts | 0 | - | 4.93 | 74,864 |
| Countries Larger Than Texas but With Fewer People | 0 | - | 4.92 | 40,207 |
| Regions of U.S. States | 0 | - | 4.37 | 44,127 |
| States, Provinces & Territories that Touch the Appalachian Mountains | 0 | - | 4.59 | 20,412 |
| 10 U.S. States with the Most Valuable Crops | 0 | - | 4.41 | 29,625 |
| U.S. States with the Lowest HDI | 0 | - | 4.47 | 28,923 |
| Which U.S. State - Multiple Choice | 0 | - | 4.48 | 20,353 |
| Movies by State | 0 | - | 4.27 | 40,598 |
| Canada Country Quiz | 0 | - | 4.55 | 132,940 |
| Canada Cities Map Quiz | 0 | - | 4.64 | 124,529 |
| Canada A-Z | 0 | - | 4.73 | 32,946 |
| Three Band Flags of Europe | 0 | - | 4.98 | 194,330 |
| Pixelated Europe Map | 0 | - | 4.88 | 123,342 |
| Pixelated Asia Map | 0 | - | 4.90 | 73,679 |
| Pixelated Africa Map | 0 | - | 4.98 | 100,344 |
| Top 10 Biggest Economies in the Americas | 0 | - | 4.94 | 92,718 |
| Mexico Country Quiz | 0 | - | 4.49 | 72,681 |
| All First-Level Subdivisions of South America on a Map | 0 | - | 4.92 | 54,643 |
| Brazil States Map Quiz | 0 | - | 4.86 | 48,490 |
| States of Brazil | 0 | - | 4.97 | 89,383 |
| Fictional Characters from the Midwest by Picture | 0 | - | 4.04 | 19,228 |
| U.S. States by Picture #2 | 0 | - | 3.47 | 11,588 |
| Most-Visited U.S. Cities | 0 | - | 4.85 | 94,731 |
| Every U.S. Metro Area on a Map | 0 | - | 4.97 | 82,394 |
| Senators Who Ran For President | 0 | - | 4.24 | 17,073 |
| U.S. Electoral College Landslides | 0 | - | 4.35 | 22,079 |
| California Pro Sport Teams | 0 | - | 4.19 | 22,708 |
| Chicago City Trivia | 0 | - | 4.31 | 31,510 |
| Texas Pro Sport Teams | 0 | - | 4.19 | 16,851 |
| History of Pennsylvania | 0 | - | 4.16 | 7,161 |
