| Asian Last Names in the United States | 0 | - | 4.43 | 46,992 |
| Countries that Beat the United States | 0 | - | 4.93 | 168,853 |
| U.S. State Nicknames | 0 | - | 4.47 | 50,790 |
| US States Quiz | 0 | - | 5.00 | 17,017,251 |
| Name the U.S. National Parks | 0 | - | 4.86 | 60,572 |
| Total United States Immigration by Country | 0 | - | 4.91 | 112,533 |
| "Do Not Travel" Countries for U.S. Citizens | 0 | - | 4.97 | 246,928 |
| U.S. Cabinet Departments | 0 | - | 4.86 | 73,142 |
| Top 10 Non-English Languages Spoken in New York City | 0 | - | 4.85 | 66,803 |
| States of the U.S. in Alphabetical Order | 0 | - | 4.98 | 368,844 |
| All 3,143 Counties of the United States on a Map | 0 | - | 4.97 | 336,074 |
| Pixelated United States Map | 0 | - | 4.89 | 94,908 |
| Most-Visited Countries by Americans | 0 | - | 4.86 | 110,693 |
| Countries that Visit the United States the Most | 0 | - | 4.96 | 92,559 |
| Deadliest U.S. Wars | 0 | - | 4.89 | 191,936 |
| The 13 Colonies Quiz | 0 | - | 4.97 | 119,156 |
| U.S. States with the Letter Y | 0 | - | 4.86 | 112,398 |
| 10 Southernmost U.S. States | 0 | - | 4.89 | 114,431 |
| U.S. States with Short Names | 0 | - | 4.91 | 150,476 |
| U.S. States that Start with M | 0 | - | 4.93 | 188,519 |
| U.S. States By Population | 0 | - | 4.92 | 154,224 |
| U.S. States that Start with N | 0 | - | 4.95 | 172,345 |
| U.S. States with Longest Names | 0 | - | 4.85 | 44,959 |
| U.S. States with a Unique First Letter | 0 | - | 4.96 | 88,960 |
| 10 Westernmost U.S. States | 0 | - | 4.95 | 64,587 |
| The Only Remaining U.S. State . . . | 0 | - | 4.93 | 66,184 |
| US States with an Empty Map | 0 | - | 5.00 | 629,428 |
| 10 Longest Rivers in the United States | 0 | - | 4.85 | 39,427 |
| Countries Closest to United States by Continent | 0 | - | 4.99 | 147,358 |
| Louisiana Purchase with a Map | 0 | - | 4.96 | 49,429 |
| Top 10 Most-Visited U.S. States | 0 | - | 4.90 | 102,564 |
| U.S. States with the Most Immigrants | 0 | - | 4.85 | 83,094 |
| Countries that Beat Canada | 0 | - | 4.90 | 99,092 |
| U.S. States or European Countries by Area | 0 | - | 4.95 | 97,349 |
| U.S. States or European Countries by Population | 0 | - | 4.97 | 134,555 |
| Name a Valid U.S. State #1 | 0 | - | 4.93 | 210,780 |
| Top 10 Coldest U.S. States | 0 | - | 4.94 | 125,967 |
| Top 10 Hottest U.S. States | 0 | - | 4.86 | 126,629 |
| Top 10 Most Native American U.S. States | 0 | - | 4.87 | 92,966 |
| Top 10 U.S. States with the Least Precipitation | 0 | - | 4.83 | 62,248 |
| American Countries with the Shortest Names | 0 | - | 4.97 | 121,755 |
| Hispanic Last Names in the U.S. | 0 | - | 4.31 | 54,872 |
| States of Mexico | 0 | - | 4.96 | 178,623 |
| Mexico States Map Quiz | 0 | - | 4.85 | 105,756 |
| Midwestern States of the U.S. | 0 | - | 4.88 | 14,202 |
| Mexico Cities Map Quiz | 0 | - | 4.83 | 38,853 |
| Countries with American Expatriates | 0 | - | 4.53 | 42,691 |
| United States Landmarks Map Quiz | 0 | - | 4.55 | 40,292 |
| United States Country Quiz | 0 | - | 4.43 | 102,314 |
| Busiest Air Routes from the U.S. | 0 | - | 4.46 | 77,095 |
| California Groups of Things | 0 | - | 4.26 | 45,799 |
| New York Groups of Things | 0 | - | 4.39 | 72,339 |
| U.S. History Groups of Two | 0 | - | 4.23 | 44,616 |
| Most-Visited Countries by Canadians | 0 | - | 4.83 | 39,661 |
| Countries Closest to Canada | 0 | - | 4.91 | 199,613 |
| Asian Countries Americans Travel to the Most | 0 | - | 4.75 | 60,246 |
| U.S. Geography by Letter - B | 0 | - | 4.54 | 70,123 |
| U.S. Geography by Letter - S | 0 | - | 4.55 | 58,482 |
| Two Letter U.S. State Abbreviations | 0 | - | 4.19 | 750,216 |
| Names of Generations | 0 | - | 4.09 | 45,583 |
| Countries Closest to the U. S. | 0 | - | 4.41 | 210,689 |
| U.S. Federal Agency Acronyms | 0 | - | 4.50 | 80,172 |
| Top 10 Non-English Languages of Los Angeles | 0 | - | 4.43 | 60,150 |
| 10 Closest Megacities to New York City | 0 | - | 4.52 | 67,553 |
| Last Names in U.S. History #1 | 0 | - | 4.25 | 36,355 |
| New England States | 0 | - | 4.51 | 59,908 |
| U.S. States by Land Area | 0 | - | 4.55 | 53,106 |
| Top 10 U.S. States by Inland Water Area | 0 | - | 4.53 | 38,134 |
| Add a Letter - Make a U.S. State | 0 | - | 4.70 | 83,203 |
| Top 10 Widest U.S. States East to West | 0 | - | 4.70 | 56,328 |
| Top 10 Tallest U.S. States North to South | 0 | - | 4.75 | 41,179 |
| U.S. States by Borders | 0 | - | 4.61 | 35,511 |
| 10 Easternmost U.S. States | 0 | - | 4.53 | 56,711 |
| The Only U.S. State ... #1 | 0 | - | 4.52 | 102,386 |
| Movies by State | 0 | - | 4.27 | 40,618 |
| 50 States, 50 Cities - Hard Version | 0 | - | 4.46 | 44,476 |
| United States Map Quiz | 0 | - | 4.98 | 4,173,140 |
| U.S. License Plates Picture Quiz | 0 | - | 4.61 | 53,180 |
| U.S. States with the Fewest Immigrants | 0 | - | 4.64 | 66,160 |
| U.S. States with the Highest Percentage of Farmland | 0 | - | 4.80 | 65,677 |
| U.S. States with the Lowest Percentage of Farmland | 0 | - | 4.70 | 61,453 |
| Walking Across U.S. State Borders with Hints | 0 | - | 4.75 | 35,129 |
| U.S. States with the Longest International Borders | 0 | - | 4.78 | 45,973 |
| Longest U.S. State Borders | 0 | - | 4.69 | 40,190 |
| Most Valuable Crops by U.S. State | 0 | - | 4.40 | 39,245 |
| Top 10 U.S. States with the Highest Elevation | 0 | - | 4.51 | 67,996 |
| U.S. States with the Lowest Average Elevation | 0 | - | 4.55 | 38,583 |
| U.S. States With the Highest Average Elevation | 0 | - | 4.61 | 32,849 |
| U.S. States with the Fewest Borders | 0 | - | 4.78 | 114,546 |
| U.S. States with the Most Borders | 0 | - | 4.53 | 62,382 |
| Last Names by Country of Origin | 0 | - | 4.64 | 157,397 |
| Flags of North and South America | 0 | - | 4.99 | 377,909 |
| Belize Country Quiz | 0 | - | 4.85 | 21,112 |
| Top U.S. Universities | 0 | - | 4.15 | 145,956 |
| Largest United States Airlines | 0 | - | 4.39 | 55,180 |
| Third Most Common Language by U.S. State | 0 | - | 4.87 | 114,031 |
| U.S. States by Governor | 0 | - | 4.43 | 18,120 |
| U.S. Political Parties in History | 0 | - | 4.44 | 27,781 |
| U.S. Government Agencies | 0 | - | 4.44 | 19,796 |
| Florida Pro Sport Teams | 0 | - | 4.61 | 11,913 |
| Events in U.S. History | 0 | - | 4.41 | 28,848 |
| Countries of Europe - One Minute Sprint | 0 | - | 4.94 | 1,336,878 |
| Most Common Surnames in the UK | 0 | - | 4.22 | 70,009 |
| U.S. Geography by Letter - C | 0 | - | 4.27 | 74,672 |
| U.S. Geography by Letter - A | 0 | - | 4.37 | 63,724 |
| U.S. Geography by Letter - D | 0 | - | 4.09 | 57,679 |
| U.S. Geography by Letter - T | 0 | - | 4.29 | 50,449 |
| U.S. Geography by Letter - P | 0 | - | 4.38 | 54,596 |
| U.S. Geography by Letter - M | 0 | - | 4.14 | 53,768 |
| U.S. Geography by Letter - L | 0 | - | 4.04 | 41,708 |
| U.S. Geography by Letter - G | 0 | - | 4.13 | 39,852 |
| U.S. Geography by Letter - R | 0 | - | 4.22 | 37,059 |
| U.S. Geography By Letter - H | 0 | - | 4.35 | 40,784 |
| American Legal Vocabulary | 0 | - | 4.40 | 34,036 |
| U.S. Cities by Picture #1 | 0 | - | 4.36 | 34,752 |
| Cities by Picture #2 | 0 | - | 4.19 | 35,322 |
| 10 U.S. States With The Lowest Murder Rates | 0 | - | 4.48 | 53,097 |
| Biggest Trading Partners - United States | 0 | - | 4.63 | 106,909 |
| The U.S. Government - How Does it Work? | 0 | - | 4.34 | 42,492 |
| American Founding Fathers | 0 | - | 4.42 | 23,278 |
| Famous People from California by Picture | 0 | - | 4.32 | 36,741 |
| Hawaiian Islands Map Quiz | 0 | - | 4.78 | 22,328 |
| Boston Talk to English Translation Quiz | 0 | - | 4.59 | 56,286 |
| People on Money - United States | 0 | - | 4.31 | 63,447 |
| 100 Most Influential Figures in U.S. History | 0 | - | 4.20 | 45,250 |
| Last Names in U.S. History #2 | 0 | - | 4.39 | 17,711 |
| Last 10 U.S. States Alphabetically | 0 | - | 4.35 | 75,092 |
| Top 10 Least Populous U.S. State Capitals | 0 | - | 4.52 | 21,578 |
| 10 U.S. States With The Highest Murder Rates | 0 | - | 4.47 | 54,898 |
| Flyover States | 0 | - | 4.53 | 29,610 |
| U.S. States With Double Letters | 0 | - | 4.55 | 24,295 |
| U.S. States Bigger than Their Neighbors | 0 | - | 4.28 | 76,448 |
| U.S. States by Wikipedia Descriptions #1 | 0 | - | 4.57 | 39,478 |
| U.S. States by Wikipedia Descriptions #2 | 0 | - | 4.48 | 37,202 |
| States and Provinces that touch the Rocky Mountains | 0 | - | 4.43 | 32,575 |
| Name a Valid U.S. State #2 | 0 | - | 4.63 | 77,464 |
| Name a Valid U.S. State #3 | 0 | - | 4.78 | 49,332 |
| U.S. State Superlatives #1 | 0 | - | 4.47 | 87,704 |
| U.S. State Superlatives #2 | 0 | - | 4.53 | 40,780 |
| Musical Acts by State | 0 | - | 4.05 | 19,612 |
| 50 States, 50 Cities - Easy Version | 0 | - | 4.39 | 129,027 |
| Top 10 U.S. States With the Most Tornadoes | 0 | - | 4.53 | 65,047 |
| Top 10 Richest U.S. States by Median Income | 0 | - | 4.46 | 119,375 |
| Top 10 Least Religious U.S. States | 0 | - | 4.51 | 34,474 |
| Top 10 Least-Forested U.S. States | 0 | - | 4.50 | 46,701 |
| Top 10 U.S. States by Public Transit | 0 | - | 4.74 | 64,091 |
| Top 10 U.S. States with the Most Precipitation | 0 | - | 4.46 | 41,841 |
| Famous Italian-Americans | 0 | - | 4.15 | 14,596 |
| Most Common Last Names in Sweden | 0 | - | 4.50 | 15,499 |
| Georgia ... or Georgia? | 0 | - | 4.68 | 77,085 |
| NFL Football Last Names | 0 | - | 4.43 | 172,123 |
| The Only American Country ... | 0 | - | 4.92 | 122,330 |
| U.S. State Border Crossings | 0 | - | 4.97 | 96,947 |
| U.S. Citizenship Test Questions | 0 | - | 4.83 | 240,944 |
| U.S. Cities with the Most International Tourists | 0 | - | 4.88 | 76,038 |
| Cities and Towns of Massachusetts | 0 | - | 4.93 | 75,164 |
| Who Did that Motown Song? | 0 | - | 4.48 | 13,079 |
| Countries Larger Than Texas but With Fewer People | 0 | - | 4.92 | 40,316 |
| Regions of U.S. States | 0 | - | 4.37 | 44,241 |
| States, Provinces & Territories that Touch the Appalachian Mountains | 0 | - | 4.59 | 20,430 |
| 10 U.S. States with the Most Valuable Crops | 0 | - | 4.41 | 29,638 |
| U.S. States with the Lowest HDI | 0 | - | 4.47 | 28,942 |
| Which U.S. State - Multiple Choice | 0 | - | 4.48 | 20,381 |
| People by U.S. State - Multiple Choice | 0 | - | 4.06 | 9,861 |
| Canada Country Quiz | 0 | - | 4.55 | 133,147 |
| Canada Cities Map Quiz | 0 | - | 4.64 | 124,673 |
| Canada A-Z | 0 | - | 4.73 | 32,988 |
| Asian Countries with the Shortest Names | 0 | - | 4.97 | 136,244 |
| Africa Geography Quiz #1 | 0 | - | 4.93 | 49,612 |
| Divided World City Name Puzzle #1 | 0 | - | 4.84 | 49,460 |
| Countries by Initial Letter and Continent #3 | 0 | - | 4.93 | 49,652 |
| Countries by Initial Letter and Continent #2 | 0 | - | 4.91 | 96,852 |
| Top 10 Biggest Economies in the Americas | 0 | - | 4.94 | 92,933 |
| Mexico Country Quiz | 0 | - | 4.49 | 72,819 |
| South American Geography Quiz #2 | 0 | - | 4.40 | 44,317 |
| South American Geography Quiz #1 | 0 | - | 4.63 | 32,927 |
| All First-Level Subdivisions of South America on a Map | 0 | - | 4.93 | 55,000 |
| Brazil States Map Quiz | 0 | - | 4.86 | 48,706 |
| States of Brazil | 0 | - | 4.98 | 89,990 |
| Fictional Characters from the Midwest by Picture | 0 | - | 4.04 | 19,239 |
| U.S. States by Picture #1 | 0 | - | 4.21 | 15,522 |
| Random U.S. City to State | 0 | - | 4.45 | 77,009 |
| Most-Visited U.S. Cities | 0 | - | 4.85 | 95,231 |
| Every U.S. Metro Area on a Map | 0 | - | 4.97 | 83,360 |
| Senators Who Ran For President | 0 | - | 4.24 | 17,091 |
| U.S. Electoral College Landslides | 0 | - | 4.35 | 22,098 |
| Geography of California | 0 | - | 4.26 | 10,701 |
| California Pro Sport Teams | 0 | - | 4.19 | 22,718 |
| Chicago City Trivia | 0 | - | 4.31 | 31,534 |
| New York Pro Sport Teams | 0 | - | 4.32 | 25,971 |
| Texas Pro Sport Teams | 0 | - | 4.19 | 16,862 |
| History of Pennsylvania | 0 | - | 4.16 | 7,171 |
| History of Virginia | 0 | - | 4.33 | 11,647 |
| Washington State by Picture | 0 | - | 4.26 | 7,763 |
| Events by U.S. State #1 | 0 | - | 4.43 | 22,976 |
| 10 U.S. States with the Highest Tax Burden | 0 | - | 4.26 | 38,410 |
| Top 10 U.S. States by Manufacturing Employment | 0 | - | 4.49 | 28,889 |
| U.S. States with the Most Venomous Snake Species | 0 | - | 4.48 | 26,500 |
| U.S. States with the Most Endangered Species | 0 | - | 4.50 | 14,401 |
| African-American Historical Figures | 0 | - | 4.18 | 17,308 |
