| Most Common U.S. Last Names - Extreme | 0 | - | 4.94 | 174,674 |
| US States Quiz | 0 | - | 5.00 | 16,896,503 |
| Name the U.S. National Parks | 0 | - | 4.86 | 60,026 |
| Total United States Immigration by Country | 0 | - | 4.91 | 111,757 |
| "Do Not Travel" Countries for U.S. Citizens | 0 | - | 4.97 | 244,452 |
| U.S. Cabinet Departments | 0 | - | 4.86 | 72,909 |
| Top 10 Non-English Languages Spoken in New York City | 0 | - | 4.85 | 66,304 |
| States of the U.S. in Alphabetical Order | 0 | - | 4.98 | 367,281 |
| All 3,143 Counties of the United States on a Map | 0 | - | 4.97 | 332,617 |
| Pixelated United States Map | 0 | - | 4.87 | 94,365 |
| Most-Visited Countries by Americans | 0 | - | 4.86 | 109,826 |
| Countries that Visit the United States the Most | 0 | - | 4.96 | 91,883 |
| Deadliest U.S. Wars | 0 | - | 4.89 | 190,932 |
| The 13 Colonies Quiz | 0 | - | 4.97 | 118,028 |
| U.S. States with the Letter Y | 0 | - | 4.85 | 111,564 |
| 10 Southernmost U.S. States | 0 | - | 4.89 | 113,552 |
| U.S. States with Short Names | 0 | - | 4.91 | 149,162 |
| U.S. States that Start with M | 0 | - | 4.93 | 187,462 |
| U.S. States By Population | 0 | - | 4.92 | 153,645 |
| U.S. States that Start with N | 0 | - | 4.95 | 171,582 |
| U.S. States with Longest Names | 0 | - | 4.84 | 44,519 |
| U.S. States with a Unique First Letter | 0 | - | 4.96 | 88,416 |
| 10 Westernmost U.S. States | 0 | - | 4.95 | 64,262 |
| The Only Remaining U.S. State . . . | 0 | - | 4.93 | 65,708 |
| US States with an Empty Map | 0 | - | 5.00 | 625,313 |
| 10 Longest Rivers in the United States | 0 | - | 4.85 | 39,207 |
| Countries Closest to United States by Continent | 0 | - | 4.99 | 146,567 |
| Countries that Beat the United States | 0 | - | 4.93 | 167,649 |
| Louisiana Purchase with a Map | 0 | - | 4.96 | 48,724 |
| Top 10 Most-Visited U.S. States | 0 | - | 4.90 | 101,856 |
| U.S. States with the Most Immigrants | 0 | - | 4.85 | 82,544 |
| U.S. States or European Countries by Area | 0 | - | 4.95 | 96,223 |
| U.S. States or European Countries by Population | 0 | - | 4.97 | 133,351 |
| Name a Valid U.S. State #1 | 0 | - | 4.93 | 209,213 |
| Top 10 Coldest U.S. States | 0 | - | 4.94 | 124,756 |
| Top 10 Hottest U.S. States | 0 | - | 4.86 | 125,783 |
| Top 10 Most Native American U.S. States | 0 | - | 4.87 | 92,211 |
| Top 10 U.S. States with the Least Precipitation | 0 | - | 4.82 | 61,947 |
| American Countries with the Shortest Names | 0 | - | 4.96 | 121,204 |
| Two Letter U.S. State Abbreviations | 0 | - | 4.19 | 747,543 |
| American Geography Quiz for Dummies | 0 | - | 4.41 | 69,202 |
| U.S. History for Dummies | 0 | - | 4.47 | 83,120 |
| States of Mexico | 0 | - | 4.96 | 176,422 |
| Mexico States Map Quiz | 0 | - | 4.84 | 104,885 |
| Midwestern States of the U.S. | 0 | - | 4.88 | 13,863 |
| Mexico Cities Map Quiz | 0 | - | 4.83 | 38,609 |
| U.S. State Nicknames | 0 | - | 4.47 | 50,563 |
| Countries with American Expatriates | 0 | - | 4.53 | 42,595 |
| United States Landmarks Map Quiz | 0 | - | 4.55 | 40,195 |
| United States Country Quiz | 0 | - | 4.43 | 101,622 |
| Busiest Air Routes from the U.S. | 0 | - | 4.46 | 76,911 |
| California Groups of Things | 0 | - | 4.25 | 45,502 |
| New York Groups of Things | 0 | - | 4.35 | 63,826 |
| U.S. History Groups of Two | 0 | - | 4.23 | 44,486 |
| Most-Visited Countries by Canadians | 0 | - | 4.82 | 39,429 |
| Countries Closest to Canada | 0 | - | 4.91 | 198,463 |
| Asian Countries Americans Travel to the Most | 0 | - | 4.75 | 60,021 |
| U.S. Geography by Letter - B | 0 | - | 4.53 | 69,469 |
| U.S. Geography by Letter - S | 0 | - | 4.55 | 52,906 |
| Countries Closest to the U. S. | 0 | - | 4.41 | 209,645 |
| U.S. Federal Agency Acronyms | 0 | - | 4.50 | 80,007 |
| Top 10 Non-English Languages of Los Angeles | 0 | - | 4.42 | 59,920 |
| 10 Closest Megacities to New York City | 0 | - | 4.52 | 67,370 |
| New England States | 0 | - | 4.51 | 59,822 |
| U.S. States by Land Area | 0 | - | 4.61 | 52,854 |
| Top 10 U.S. States by Inland Water Area | 0 | - | 4.53 | 38,022 |
| Add a Letter - Make a U.S. State | 0 | - | 4.70 | 82,867 |
| Top 10 Widest U.S. States East to West | 0 | - | 4.70 | 56,054 |
| Top 10 Tallest U.S. States North to South | 0 | - | 4.74 | 40,967 |
| U.S. States by Borders | 0 | - | 4.61 | 35,349 |
| Save Americans by Guessing U.S. States | 0 | - | 4.63 | 186,109 |
| 10 Easternmost U.S. States | 0 | - | 4.53 | 56,511 |
| The Only U.S. State ... #1 | 0 | - | 4.52 | 102,100 |
| 50 States, 50 Cities - Hard Version | 0 | - | 4.46 | 44,250 |
| Countries that Beat Canada | 0 | - | 4.91 | 98,183 |
| Asian Last Names in the United States | 0 | - | 4.43 | 46,807 |
| Fictional Characters from the Midwest by Picture | 0 | - | 4.04 | 19,204 |
| United States Map Quiz | 0 | - | 4.98 | 4,161,433 |
| U.S. License Plates Picture Quiz | 0 | - | 4.61 | 52,966 |
| U.S. States with the Fewest Immigrants | 0 | - | 4.63 | 65,842 |
| U.S. States with the Highest Percentage of Farmland | 0 | - | 4.80 | 65,514 |
| U.S. States with the Lowest Percentage of Farmland | 0 | - | 4.74 | 55,221 |
| Walking Across U.S. State Borders with Hints | 0 | - | 4.74 | 35,055 |
| U.S. States with the Longest International Borders | 0 | - | 4.78 | 45,823 |
| Longest U.S. State Borders | 0 | - | 4.67 | 39,874 |
| Top 10 U.S. States with the Highest Elevation | 0 | - | 4.51 | 67,892 |
| U.S. States with the Lowest Average Elevation | 0 | - | 4.55 | 38,513 |
| U.S. States With the Highest Average Elevation | 0 | - | 4.61 | 32,786 |
| U.S. States with the Fewest Borders | 0 | - | 4.78 | 113,930 |
| U.S. States with the Most Borders | 0 | - | 4.53 | 62,317 |
| Europe Geography Decoder | 0 | - | 4.86 | 70,039 |
| Flags of North and South America | 0 | - | 4.99 | 373,716 |
| Belize Country Quiz | 0 | - | 4.85 | 20,998 |
| Top U.S. Universities | 0 | - | 4.15 | 145,255 |
| Largest United States Airlines | 0 | - | 4.39 | 55,053 |
| Third Most Common Language by U.S. State | 0 | - | 4.87 | 113,771 |
| U.S. States by Governor | 0 | - | 4.43 | 18,071 |
| U.S. Political Parties in History | 0 | - | 4.44 | 27,708 |
| U.S. Government Agencies | 0 | - | 4.44 | 19,693 |
| Florida Pro Sport Teams | 0 | - | 4.61 | 11,854 |
| Events in U.S. History | 0 | - | 4.41 | 28,691 |
| Georgia ... or Georgia? | 0 | - | 4.67 | 76,821 |
| Famous People from Africa | 0 | - | 4.45 | 10,956 |
| U.S. Geography by Letter - C | 0 | - | 4.27 | 74,124 |
| U.S. Geography by Letter - A | 0 | - | 4.37 | 63,138 |
| U.S. Geography by Letter - D | 0 | - | 4.09 | 57,131 |
| U.S. Geography by Letter - T | 0 | - | 4.29 | 49,826 |
| U.S. Geography by Letter - P | 0 | - | 4.38 | 53,951 |
| U.S. Geography by Letter - M | 0 | - | 4.14 | 53,357 |
| U.S. Geography by Letter - L | 0 | - | 4.04 | 41,184 |
| U.S. Geography by Letter - G | 0 | - | 4.13 | 39,346 |
| U.S. Geography By Letter - H | 0 | - | 4.35 | 40,200 |
| American Legal Vocabulary | 0 | - | 4.40 | 33,937 |
| U.S. Cities by Picture #1 | 0 | - | 4.36 | 34,588 |
| Cities by Picture #2 | 0 | - | 4.19 | 35,160 |
| 10 U.S. States With The Lowest Murder Rates | 0 | - | 4.48 | 51,412 |
| Biggest Trading Partners - United States | 0 | - | 4.63 | 106,691 |
| Name a Valid Answer - United States #1 | 0 | - | 4.61 | 94,069 |
| The U.S. Government - How Does it Work? | 0 | - | 4.34 | 42,379 |
| American Founding Fathers | 0 | - | 4.42 | 23,233 |
| Famous People from California by Picture | 0 | - | 4.32 | 36,490 |
| Hawaiian Islands Map Quiz | 0 | - | 4.78 | 22,283 |
| Boston Talk to English Translation Quiz | 0 | - | 4.59 | 55,999 |
| People on Money - United States | 0 | - | 4.31 | 63,355 |
| 100 Most Influential Figures in U.S. History | 0 | - | 4.20 | 45,088 |
| Last 10 U.S. States Alphabetically | 0 | - | 4.35 | 74,882 |
| Top 10 Least Populous U.S. State Capitals | 0 | - | 4.52 | 21,534 |
| 10 U.S. States With The Highest Murder Rates | 0 | - | 4.47 | 54,435 |
| Flyover States | 0 | - | 4.52 | 29,526 |
| U.S. States With Double Letters | 0 | - | 4.55 | 24,142 |
| U.S. States Bigger than Their Neighbors | 0 | - | 4.28 | 76,218 |
| U.S. States by Wikipedia Descriptions #1 | 0 | - | 4.57 | 39,364 |
| U.S. States by Wikipedia Descriptions #2 | 0 | - | 4.48 | 37,118 |
| States and Provinces that touch the Rocky Mountains | 0 | - | 4.43 | 32,509 |
| Name a Valid U.S. State #2 | 0 | - | 4.63 | 77,087 |
| Name a Valid U.S. State #3 | 0 | - | 4.78 | 49,063 |
| U.S. State Superlatives #1 | 0 | - | 4.47 | 87,556 |
| U.S. State Superlatives #2 | 0 | - | 4.53 | 40,657 |
| 50 States, 50 Cities - Easy Version | 0 | - | 4.39 | 128,433 |
| Top 10 U.S. States With the Most Tornadoes | 0 | - | 4.53 | 64,802 |
| Top 10 Richest U.S. States by Median Income | 0 | - | 4.47 | 119,139 |
| Top 10 Least Religious U.S. States | 0 | - | 4.51 | 34,330 |
| Top 10 Least-Forested U.S. States | 0 | - | 4.50 | 46,544 |
| Top 10 U.S. States by Public Transit | 0 | - | 4.77 | 63,807 |
| Top 10 U.S. States with the Most Precipitation | 0 | - | 4.46 | 41,720 |
| Add A Letter - Make a European City | 0 | - | 4.90 | 23,409 |
| Africa Geography Quiz #1 | 0 | - | 4.93 | 49,365 |
| Countries of Africa - One Minute Sprint | 0 | - | 4.43 | 322,532 |
| The Only American Country ... | 0 | - | 4.92 | 121,719 |
| U.S. State Border Crossings | 0 | - | 4.97 | 96,544 |
| U.S. Citizenship Test Questions | 0 | - | 4.83 | 239,607 |
| U.S. Cities with the Most International Tourists | 0 | - | 4.88 | 75,546 |
| Names of Generations | 0 | - | 4.09 | 45,065 |
| Cities and Towns of Massachusetts | 0 | - | 4.92 | 74,226 |
| Who Did that Motown Song? | 0 | - | 4.48 | 13,057 |
| Countries Larger Than Texas but With Fewer People | 0 | - | 4.92 | 39,996 |
| Regions of U.S. States | 0 | - | 4.37 | 43,930 |
| States, Provinces & Territories that Touch the Appalachian Mountains | 0 | - | 4.59 | 20,394 |
| 10 U.S. States with the Most Valuable Crops | 0 | - | 4.41 | 29,586 |
| U.S. States with the Lowest HDI | 0 | - | 4.47 | 28,862 |
| Which U.S. State - Multiple Choice | 0 | - | 4.48 | 20,309 |
| Movies by State | 0 | - | 4.27 | 40,557 |
| U.S Cities by African-American Population | 0 | - | 4.42 | 95,380 |
| Canada Country Quiz | 0 | - | 4.54 | 132,577 |
| Canada Cities Map Quiz | 0 | - | 4.64 | 124,275 |
| Canada A-Z | 0 | - | 4.73 | 32,859 |
| Category Elimination - European Geography #3 | 0 | - | 4.86 | 81,135 |
| Category Elimination - African Geography #1 | 0 | - | 4.90 | 92,466 |
| Top 10 Biggest Economies in the Americas | 0 | - | 4.94 | 92,282 |
| Hispanic Last Names in the U.S. | 0 | - | 4.31 | 54,779 |
| Mexico Country Quiz | 0 | - | 4.49 | 72,488 |
| South American Geography Quiz #2 | 0 | - | 4.61 | 39,372 |
| South American Geography Quiz #1 | 0 | - | 4.62 | 32,590 |
| All First-Level Subdivisions of South America on a Map | 0 | - | 4.92 | 54,041 |
| Brazil States Map Quiz | 0 | - | 4.85 | 48,181 |
| States of Brazil | 0 | - | 4.97 | 88,338 |
| U.S. States by Picture #1 | 0 | - | 4.21 | 15,453 |
| Most-Visited U.S. Cities | 0 | - | 4.85 | 94,036 |
| Every U.S. Metro Area on a Map | 0 | - | 4.97 | 81,899 |
| Senators Who Ran For President | 0 | - | 4.24 | 17,054 |
| U.S. Electoral College Landslides | 0 | - | 4.35 | 22,046 |
| Geography of California | 0 | - | 4.26 | 10,577 |
| California Pro Sport Teams | 0 | - | 4.19 | 22,694 |
| Chicago City Trivia | 0 | - | 4.31 | 31,462 |
| New York Pro Sport Teams | 0 | - | 4.32 | 25,908 |
| Texas Pro Sport Teams | 0 | - | 4.19 | 16,827 |
| History of Pennsylvania | 0 | - | 4.16 | 7,141 |
| History of Virginia | 0 | - | 4.31 | 11,605 |
| Washington State by Picture | 0 | - | 4.26 | 7,734 |
| Events by U.S. State #1 | 0 | - | 4.43 | 22,919 |
| Most Valuable Crops by U.S. State | 0 | - | 4.40 | 39,109 |
| 10 U.S. States with the Highest Tax Burden | 0 | - | 4.26 | 38,258 |
| Top 10 U.S. States by Manufacturing Employment | 0 | - | 4.49 | 28,830 |
| U.S. States with the Most Venomous Snake Species | 0 | - | 4.47 | 26,441 |
| U.S. States with the Most Endangered Species | 0 | - | 4.50 | 14,369 |
| Canadian Prime Ministers | 0 | - | 4.63 | 57,580 |
| Capitals of Canadian Provinces | 0 | - | 4.85 | 89,182 |
| U.S. States With No City Over 100,000 | 0 | - | 4.57 | 18,012 |
| Category Elimination - European Geography #1 | 0 | - | 4.98 | 233,594 |
| European Map without 10 Random Countries | 0 | - | 4.97 | 277,120 |
