| Most Common U.S. Last Names - Extreme | 0 | - | 4.94 | 174,486 |
| Countries that Beat the United States | 0 | - | 4.93 | 167,441 |
| U.S. State Nicknames | 0 | - | 4.47 | 50,517 |
| US States Quiz | 0 | - | 5.00 | 16,873,008 |
| Name the U.S. National Parks | 0 | - | 4.86 | 59,940 |
| Total United States Immigration by Country | 0 | - | 4.91 | 111,635 |
| "Do Not Travel" Countries for U.S. Citizens | 0 | - | 4.97 | 244,005 |
| U.S. Cabinet Departments | 0 | - | 4.86 | 72,873 |
| Top 10 Non-English Languages Spoken in New York City | 0 | - | 4.85 | 66,218 |
| States of the U.S. in Alphabetical Order | 0 | - | 4.98 | 367,019 |
| All 3,143 Counties of the United States on a Map | 0 | - | 4.97 | 331,955 |
| Asian Last Names in the United States | 0 | - | 4.43 | 46,765 |
| Pixelated United States Map | 0 | - | 4.87 | 94,257 |
| Most-Visited Countries by Americans | 0 | - | 4.86 | 109,667 |
| Countries that Visit the United States the Most | 0 | - | 4.96 | 91,758 |
| Deadliest U.S. Wars | 0 | - | 4.89 | 190,786 |
| The 13 Colonies Quiz | 0 | - | 4.97 | 117,851 |
| U.S. States with the Letter Y | 0 | - | 4.85 | 111,407 |
| 10 Southernmost U.S. States | 0 | - | 4.88 | 113,420 |
| U.S. States with Short Names | 0 | - | 4.91 | 148,983 |
| U.S. States that Start with M | 0 | - | 4.93 | 187,274 |
| U.S. States By Population | 0 | - | 4.92 | 153,533 |
| U.S. States that Start with N | 0 | - | 4.95 | 171,435 |
| U.S. States with Longest Names | 0 | - | 4.84 | 44,435 |
| U.S. States with a Unique First Letter | 0 | - | 4.96 | 88,291 |
| 10 Westernmost U.S. States | 0 | - | 4.95 | 64,204 |
| The Only Remaining U.S. State . . . | 0 | - | 4.93 | 65,609 |
| US States with an Empty Map | 0 | - | 5.00 | 624,513 |
| 10 Longest Rivers in the United States | 0 | - | 4.85 | 39,174 |
| Countries Closest to United States by Continent | 0 | - | 4.99 | 146,441 |
| Louisiana Purchase with a Map | 0 | - | 4.96 | 48,592 |
| Top 10 Most-Visited U.S. States | 0 | - | 4.90 | 101,755 |
| U.S. States with the Most Immigrants | 0 | - | 4.85 | 82,466 |
| Countries that Beat Canada | 0 | - | 4.91 | 97,304 |
| U.S. States or European Countries by Area | 0 | - | 4.95 | 96,012 |
| U.S. States or European Countries by Population | 0 | - | 4.97 | 133,186 |
| Name a Valid U.S. State #1 | 0 | - | 4.93 | 208,863 |
| Top 10 Coldest U.S. States | 0 | - | 4.94 | 124,642 |
| Top 10 Hottest U.S. States | 0 | - | 4.86 | 125,641 |
| Top 10 Most Native American U.S. States | 0 | - | 4.87 | 91,993 |
| Top 10 U.S. States with the Least Precipitation | 0 | - | 4.82 | 61,900 |
| American Countries with the Shortest Names | 0 | - | 4.96 | 121,109 |
| States of Mexico | 0 | - | 4.96 | 176,043 |
| Mexico States Map Quiz | 0 | - | 4.85 | 104,726 |
| Midwestern States of the U.S. | 0 | - | 4.88 | 13,770 |
| Mexico Cities Map Quiz | 0 | - | 4.83 | 38,536 |
| Countries with American Expatriates | 0 | - | 4.53 | 42,584 |
| United States Landmarks Map Quiz | 0 | - | 4.55 | 40,173 |
| United States Country Quiz | 0 | - | 4.43 | 101,500 |
| Busiest Air Routes from the U.S. | 0 | - | 4.46 | 76,875 |
| California Groups of Things | 0 | - | 4.25 | 45,488 |
| New York Groups of Things | 0 | - | 4.35 | 63,689 |
| U.S. History Groups of Two | 0 | - | 4.23 | 44,456 |
| Most-Visited Countries by Canadians | 0 | - | 4.82 | 39,381 |
| Countries Closest to Canada | 0 | - | 4.91 | 198,337 |
| Asian Countries Americans Travel to the Most | 0 | - | 4.75 | 59,972 |
| U.S. Geography by Letter - B | 0 | - | 4.53 | 69,417 |
| U.S. Geography by Letter - S | 0 | - | 4.55 | 52,862 |
| Two Letter U.S. State Abbreviations | 0 | - | 4.19 | 747,096 |
| Names of Generations | 0 | - | 4.09 | 44,881 |
| Countries Closest to the U. S. | 0 | - | 4.41 | 209,456 |
| U.S. Federal Agency Acronyms | 0 | - | 4.50 | 79,978 |
| Top 10 Non-English Languages of Los Angeles | 0 | - | 4.42 | 59,878 |
| 10 Closest Megacities to New York City | 0 | - | 4.52 | 67,346 |
| New England States | 0 | - | 4.51 | 59,808 |
| U.S. States by Land Area | 0 | - | 4.61 | 52,809 |
| Top 10 U.S. States by Inland Water Area | 0 | - | 4.53 | 38,009 |
| Add a Letter - Make a U.S. State | 0 | - | 4.72 | 82,814 |
| Top 10 Widest U.S. States East to West | 0 | - | 4.70 | 56,001 |
| Top 10 Tallest U.S. States North to South | 0 | - | 4.74 | 40,923 |
| U.S. States by Borders | 0 | - | 4.61 | 35,313 |
| 10 Easternmost U.S. States | 0 | - | 4.53 | 56,481 |
| The Only U.S. State ... #1 | 0 | - | 4.52 | 102,038 |
| Movies by State | 0 | - | 4.27 | 40,542 |
| 50 States, 50 Cities - Hard Version | 0 | - | 4.46 | 44,217 |
| Hispanic Last Names in the U.S. | 0 | - | 4.31 | 54,749 |
| United States Map Quiz | 0 | - | 4.98 | 4,158,293 |
| U.S. License Plates Picture Quiz | 0 | - | 4.61 | 52,924 |
| U.S. States with the Fewest Immigrants | 0 | - | 4.63 | 65,791 |
| U.S. States with the Highest Percentage of Farmland | 0 | - | 4.80 | 65,483 |
| U.S. States with the Lowest Percentage of Farmland | 0 | - | 4.74 | 55,186 |
| Walking Across U.S. State Borders with Hints | 0 | - | 4.74 | 35,041 |
| U.S. States with the Longest International Borders | 0 | - | 4.78 | 45,795 |
| Longest U.S. State Borders | 0 | - | 4.67 | 39,814 |
| Most Valuable Crops by U.S. State | 0 | - | 4.40 | 39,092 |
| Top 10 U.S. States with the Highest Elevation | 0 | - | 4.51 | 67,874 |
| U.S. States with the Lowest Average Elevation | 0 | - | 4.55 | 38,492 |
| U.S. States With the Highest Average Elevation | 0 | - | 4.61 | 32,770 |
| U.S. States with the Fewest Borders | 0 | - | 4.78 | 113,842 |
| U.S. States with the Most Borders | 0 | - | 4.53 | 62,303 |
| Flags of North and South America | 0 | - | 4.99 | 373,036 |
| Belize Country Quiz | 0 | - | 4.85 | 20,972 |
| Top U.S. Universities | 0 | - | 4.15 | 145,119 |
| Largest United States Airlines | 0 | - | 4.39 | 55,025 |
| Third Most Common Language by U.S. State | 0 | - | 4.87 | 113,728 |
| U.S. States by Governor | 0 | - | 4.43 | 18,063 |
| U.S. Political Parties in History | 0 | - | 4.44 | 27,695 |
| U.S. Government Agencies | 0 | - | 4.44 | 19,678 |
| Florida Pro Sport Teams | 0 | - | 4.61 | 11,842 |
| Events in U.S. History | 0 | - | 4.41 | 28,670 |
| Countries of Europe - One Minute Sprint | 0 | - | 4.94 | 1,328,623 |
| Most Common First Names in Spain | 0 | - | 4.27 | 45,610 |
| Georgia ... or Georgia? | 0 | - | 4.67 | 76,766 |
| U.S. Geography by Letter - C | 0 | - | 4.27 | 74,082 |
| U.S. Geography by Letter - A | 0 | - | 4.37 | 63,092 |
| U.S. Geography by Letter - D | 0 | - | 4.09 | 57,085 |
| U.S. Geography by Letter - T | 0 | - | 4.29 | 49,776 |
| U.S. Geography by Letter - P | 0 | - | 4.38 | 53,856 |
| U.S. Geography by Letter - M | 0 | - | 4.14 | 53,329 |
| U.S. Geography by Letter - L | 0 | - | 4.04 | 41,134 |
| U.S. Geography by Letter - G | 0 | - | 4.13 | 39,302 |
| U.S. Geography By Letter - H | 0 | - | 4.35 | 40,123 |
| American Legal Vocabulary | 0 | - | 4.40 | 33,916 |
| U.S. Cities by Picture #1 | 0 | - | 4.36 | 34,556 |
| Cities by Picture #2 | 0 | - | 4.19 | 35,138 |
| 10 U.S. States With The Lowest Murder Rates | 0 | - | 4.51 | 42,159 |
| Biggest Trading Partners - United States | 0 | - | 4.63 | 106,655 |
| The U.S. Government - How Does it Work? | 0 | - | 4.34 | 42,361 |
| American Founding Fathers | 0 | - | 4.42 | 23,223 |
| Famous People from California by Picture | 0 | - | 4.32 | 36,441 |
| Hawaiian Islands Map Quiz | 0 | - | 4.78 | 22,263 |
| Boston Talk to English Translation Quiz | 0 | - | 4.59 | 55,969 |
| People on Money - United States | 0 | - | 4.31 | 63,344 |
| 100 Most Influential Figures in U.S. History | 0 | - | 4.20 | 45,049 |
| Last 10 U.S. States Alphabetically | 0 | - | 4.35 | 74,845 |
| Top 10 Least Populous U.S. State Capitals | 0 | - | 4.52 | 21,522 |
| 10 U.S. States With The Highest Murder Rates | 0 | - | 4.47 | 54,126 |
| Flyover States | 0 | - | 4.52 | 29,513 |
| U.S. States With Double Letters | 0 | - | 4.55 | 24,120 |
| U.S. States Bigger than Their Neighbors | 0 | - | 4.27 | 76,151 |
| U.S. States by Wikipedia Descriptions #1 | 0 | - | 4.57 | 39,339 |
| U.S. States by Wikipedia Descriptions #2 | 0 | - | 4.48 | 37,098 |
| States and Provinces that touch the Rocky Mountains | 0 | - | 4.43 | 32,495 |
| Name a Valid U.S. State #2 | 0 | - | 4.63 | 77,009 |
| Name a Valid U.S. State #3 | 0 | - | 4.78 | 49,033 |
| U.S. State Superlatives #1 | 0 | - | 4.47 | 87,528 |
| U.S. State Superlatives #2 | 0 | - | 4.53 | 40,632 |
| Musical Acts by State | 0 | - | 4.05 | 19,590 |
| 50 States, 50 Cities - Easy Version | 0 | - | 4.39 | 128,368 |
| Top 10 U.S. States With the Most Tornadoes | 0 | - | 4.53 | 64,745 |
| Top 10 Richest U.S. States by Median Income | 0 | - | 4.47 | 119,093 |
| Top 10 Least Religious U.S. States | 0 | - | 4.51 | 34,299 |
| Top 10 Least-Forested U.S. States | 0 | - | 4.50 | 46,520 |
| Top 10 U.S. States by Public Transit | 0 | - | 4.77 | 63,765 |
| Top 10 U.S. States with the Most Precipitation | 0 | - | 4.46 | 41,698 |
| Famous Italian-Americans | 0 | - | 4.15 | 14,462 |
| Africa Geography Quiz #1 | 0 | - | 4.93 | 49,335 |
| The Only American Country ... | 0 | - | 4.92 | 121,595 |
| U.S. State Border Crossings | 0 | - | 4.97 | 96,477 |
| U.S. Citizenship Test Questions | 0 | - | 4.83 | 239,447 |
| U.S. Cities with the Most International Tourists | 0 | - | 4.88 | 75,461 |
| Cities and Towns of Massachusetts | 0 | - | 4.92 | 74,022 |
| Who Did that Motown Song? | 0 | - | 4.48 | 13,052 |
| Countries Larger Than Texas but With Fewer People | 0 | - | 4.92 | 39,931 |
| Last Names in U.S. History #1 | 0 | - | 4.25 | 36,239 |
| Regions of U.S. States | 0 | - | 4.37 | 43,870 |
| States, Provinces & Territories that Touch the Appalachian Mountains | 0 | - | 4.59 | 20,385 |
| 10 U.S. States with the Most Valuable Crops | 0 | - | 4.41 | 29,571 |
| U.S. States with the Lowest HDI | 0 | - | 4.47 | 28,849 |
| Which U.S. State - Multiple Choice | 0 | - | 4.48 | 20,294 |
| People by U.S. State - Multiple Choice | 0 | - | 4.06 | 9,840 |
| Canada Country Quiz | 0 | - | 4.54 | 132,474 |
| Canada Cities Map Quiz | 0 | - | 4.63 | 124,198 |
| Canada A-Z | 0 | - | 4.73 | 32,833 |
| Asian Countries with the Shortest Names | 0 | - | 4.97 | 135,278 |
| Divided World City Name Puzzle #1 | 0 | - | 4.87 | 48,764 |
| Actors by Last Name #1 | 0 | - | 4.28 | 68,563 |
| Actresses by Last Name #1 | 0 | - | 4.25 | 63,713 |
| Actors by Last Name #2 | 0 | - | 4.01 | 59,022 |
| Countries by Initial Letter and Continent #3 | 0 | - | 4.93 | 48,681 |
| Countries by Initial Letter and Continent #2 | 0 | - | 4.91 | 96,198 |
| Category Elimination - African Geography #1 | 0 | - | 4.90 | 92,339 |
| Name a Valid African Country | 0 | - | 4.98 | 154,064 |
| Top 10 Biggest Economies in the Americas | 0 | - | 4.94 | 92,169 |
| Mexico Country Quiz | 0 | - | 4.49 | 72,418 |
| South American Geography Quiz #2 | 0 | - | 4.61 | 39,345 |
| South American Geography Quiz #1 | 0 | - | 4.62 | 32,575 |
| All First-Level Subdivisions of South America on a Map | 0 | - | 4.92 | 53,899 |
| Brazil States Map Quiz | 0 | - | 4.85 | 48,038 |
| States of Brazil | 0 | - | 4.97 | 88,013 |
| Fictional Characters from the Midwest by Picture | 0 | - | 4.04 | 19,198 |
| U.S. States by Picture #1 | 0 | - | 4.21 | 15,437 |
| Random U.S. City to State | 0 | - | 4.45 | 76,310 |
| Most-Visited U.S. Cities | 0 | - | 4.85 | 93,813 |
| Every U.S. Metro Area on a Map | 0 | - | 4.97 | 81,783 |
| Senators Who Ran For President | 0 | - | 4.24 | 17,041 |
| U.S. Electoral College Landslides | 0 | - | 4.35 | 22,038 |
| Geography of California | 0 | - | 4.26 | 10,565 |
| California Pro Sport Teams | 0 | - | 4.19 | 22,688 |
| Chicago City Trivia | 0 | - | 4.31 | 31,445 |
| New York Pro Sport Teams | 0 | - | 4.32 | 25,899 |
| Texas Pro Sport Teams | 0 | - | 4.19 | 16,823 |
| History of Pennsylvania | 0 | - | 4.16 | 7,135 |
| History of Virginia | 0 | - | 4.31 | 11,599 |
| Washington State by Picture | 0 | - | 4.26 | 7,727 |
| Events by U.S. State #1 | 0 | - | 4.43 | 22,909 |
| 10 U.S. States with the Highest Tax Burden | 0 | - | 4.26 | 38,231 |
| Top 10 U.S. States by Manufacturing Employment | 0 | - | 4.49 | 28,814 |
| U.S. States with the Most Venomous Snake Species | 0 | - | 4.47 | 26,425 |
| U.S. States with the Most Endangered Species | 0 | - | 4.50 | 14,358 |
