| Deadliest U.S. Wars | 0 | - | 4.89 | 191,302 |
| US States Quiz | 0 | - | 5.00 | 16,927,319 |
| States of the U.S. in Alphabetical Order | 0 | - | 4.98 | 367,898 |
| Name the U.S. National Parks | 0 | - | 4.86 | 60,153 |
| Total United States Immigration by Country | 0 | - | 4.91 | 111,940 |
| Most Common U.S. Last Names - Extreme | 0 | - | 4.94 | 174,946 |
| "Do Not Travel" Countries for U.S. Citizens | 0 | - | 4.97 | 245,025 |
| U.S. Cabinet Departments | 0 | - | 4.86 | 72,957 |
| Top 10 Non-English Languages Spoken in New York City | 0 | - | 4.85 | 66,435 |
| United States Map Quiz | 0 | - | 4.98 | 4,164,363 |
| All 3,143 Counties of the United States on a Map | 0 | - | 4.97 | 333,434 |
| Pixelated United States Map | 0 | - | 4.88 | 94,504 |
| Most-Visited Countries by Americans | 0 | - | 4.86 | 110,009 |
| Countries that Visit the United States the Most | 0 | - | 4.96 | 92,044 |
| The 13 Colonies Quiz | 0 | - | 4.97 | 118,170 |
| U.S. States with the Letter Y | 0 | - | 4.85 | 111,772 |
| 10 Southernmost U.S. States | 0 | - | 4.89 | 113,712 |
| U.S. States with Short Names | 0 | - | 4.91 | 149,398 |
| U.S. States that Start with M | 0 | - | 4.93 | 187,715 |
| U.S. States By Population | 0 | - | 4.92 | 153,785 |
| U.S. States that Start with N | 0 | - | 4.95 | 171,776 |
| U.S. States with Longest Names | 0 | - | 4.84 | 44,620 |
| U.S. States with a Unique First Letter | 0 | - | 4.96 | 88,557 |
| 10 Westernmost U.S. States | 0 | - | 4.95 | 64,347 |
| The Only Remaining U.S. State . . . | 0 | - | 4.93 | 65,820 |
| 10 Longest Rivers in the United States | 0 | - | 4.85 | 39,253 |
| Countries Closest to United States by Continent | 0 | - | 4.99 | 146,751 |
| Countries that Beat the United States | 0 | - | 4.93 | 167,906 |
| Events in U.S. History | 0 | - | 4.41 | 28,726 |
| Louisiana Purchase with a Map | 0 | - | 4.96 | 48,890 |
| US States with an Empty Map | 0 | - | 5.00 | 626,278 |
| Top 10 Most-Visited U.S. States | 0 | - | 4.90 | 101,983 |
| U.S. States with the Most Immigrants | 0 | - | 4.85 | 82,631 |
| U.S. States or European Countries by Area | 0 | - | 4.95 | 96,454 |
| U.S. States or European Countries by Population | 0 | - | 4.97 | 133,585 |
| People on Money - United States | 0 | - | 4.31 | 63,382 |
| U.S. History Groups of Two | 0 | - | 4.23 | 44,512 |
| Name a Valid U.S. State #1 | 0 | - | 4.93 | 209,564 |
| Top 10 Coldest U.S. States | 0 | - | 4.94 | 125,368 |
| Top 10 Hottest U.S. States | 0 | - | 4.86 | 126,012 |
| Top 10 Most Native American U.S. States | 0 | - | 4.87 | 92,390 |
| Top 10 U.S. States with the Least Precipitation | 0 | - | 4.82 | 62,038 |
| U.S. State Border Crossings | 0 | - | 4.97 | 96,642 |
| U.S. Citizenship Test Questions | 0 | - | 4.83 | 239,797 |
| U.S. Cities with the Most International Tourists | 0 | - | 4.88 | 75,649 |
| Cities and Towns of Massachusetts | 0 | - | 4.92 | 74,464 |
| Countries Larger Than Texas but With Fewer People | 0 | - | 4.92 | 40,061 |
| U.S. History for Dummies | 0 | - | 4.47 | 83,219 |
| States of Mexico | 0 | - | 4.96 | 176,920 |
| Mexico States Map Quiz | 0 | - | 4.84 | 105,215 |
| Embarrassing Chapters in US History | 0 | - | 4.17 | 33,142 |
| Midwestern States of the U.S. | 0 | - | 4.88 | 13,936 |
| Mexico Cities Map Quiz | 0 | - | 4.83 | 38,706 |
| U.S. State Nicknames | 0 | - | 4.47 | 50,610 |
| Countries with American Expatriates | 0 | - | 4.53 | 42,620 |
| United States Landmarks Map Quiz | 0 | - | 4.55 | 40,219 |
| United States Country Quiz | 0 | - | 4.43 | 101,772 |
| Busiest Air Routes from the U.S. | 0 | - | 4.46 | 76,976 |
| U.S. Presidents Quiz | 0 | - | 5.00 | 3,710,606 |
| American Founding Fathers | 0 | - | 4.42 | 23,247 |
| 100 Most Influential Figures in U.S. History | 0 | - | 4.20 | 45,138 |
| U.S. History Multiple Choice #3 | 0 | - | 4.43 | 24,751 |
| Valid Answer - U.S. History | 0 | - | 4.24 | 22,560 |
| 10 Northernmost U.S. States | 0 | - | 4.90 | 82,728 |
| Top 10 Largest U.S. States by Area | 0 | - | 4.95 | 160,327 |
| Top 10 Smallest U.S. States by Area | 0 | - | 4.98 | 177,975 |
| Top 10 Poorest U.S. States by Median Income | 0 | - | 4.86 | 125,443 |
| U.S. States with the Highest Percentage of Hispanics | 0 | - | 4.85 | 69,691 |
| Top 10 Newest U.S. States | 0 | - | 4.85 | 86,466 |
| Top 10 U.S. States Where the Rent is Too Dang High | 0 | - | 4.85 | 67,754 |
| Most-Visited Countries by Canadians | 0 | - | 4.83 | 39,465 |
| Countries Closest to Canada | 0 | - | 4.91 | 198,646 |
| Asian Countries Americans Travel to the Most | 0 | - | 4.75 | 60,079 |
| U.S. Geography by Letter - B | 0 | - | 4.53 | 69,720 |
| U.S. Geography by Letter - S | 0 | - | 4.55 | 53,181 |
| Two Letter U.S. State Abbreviations | 0 | - | 4.19 | 748,237 |
| Names of Generations | 0 | - | 4.09 | 45,243 |
| Countries Closest to the U. S. | 0 | - | 4.41 | 209,921 |
| American Geography Quiz for Dummies | 0 | - | 4.41 | 69,269 |
| U.S. Federal Agency Acronyms | 0 | - | 4.50 | 80,049 |
| Top 10 Non-English Languages of Los Angeles | 0 | - | 4.43 | 59,974 |
| 10 Closest Megacities to New York City | 0 | - | 4.52 | 67,404 |
| Old West History | 0 | - | 4.34 | 15,287 |
| Life of Benjamin Franklin | 0 | - | 4.24 | 6,529 |
| American Revolution - Multiple Choice | 0 | - | 4.34 | 19,957 |
| New England States | 0 | - | 4.51 | 59,841 |
| U.S. States by Land Area | 0 | - | 4.63 | 52,917 |
| Top 10 U.S. States by Inland Water Area | 0 | - | 4.53 | 38,047 |
| Add a Letter - Make a U.S. State | 0 | - | 4.70 | 82,935 |
| Top 10 Widest U.S. States East to West | 0 | - | 4.70 | 56,135 |
| Top 10 Tallest U.S. States North to South | 0 | - | 4.74 | 41,018 |
| U.S. States by Borders | 0 | - | 4.61 | 35,388 |
| Save Americans by Guessing U.S. States | 0 | - | 4.63 | 186,700 |
| 10 Easternmost U.S. States | 0 | - | 4.53 | 56,554 |
| The Only U.S. State ... #1 | 0 | - | 4.52 | 102,162 |
| 50 States, 50 Cities - Hard Version | 0 | - | 4.46 | 44,281 |
| Countries that Beat Canada | 0 | - | 4.91 | 98,576 |
| The United States... or the United Kingdom? | 0 | - | 4.87 | 98,778 |
| Asian Last Names in the United States | 0 | - | 4.43 | 46,851 |
| History of Pennsylvania | 0 | - | 4.16 | 7,148 |
| History of Virginia | 0 | - | 4.31 | 11,615 |
| Flags of North and South America | 0 | - | 4.99 | 374,628 |
| South America Map Quiz | 0 | - | 5.00 | 1,552,191 |
| Belize Country Quiz | 0 | - | 4.85 | 21,024 |
| Saint Vincent and the Grenadines Country Quiz | 0 | - | 4.88 | 19,249 |
| Countries of North America Quiz | 0 | - | 5.00 | 1,026,454 |
| Top U.S. Universities | 0 | - | 4.15 | 145,420 |
| Largest United States Airlines | 0 | - | 4.39 | 55,083 |
| U.S. Five-Star Generals and Admirals | 0 | - | 4.33 | 8,341 |
| 10 U.S. States With The Lowest Murder Rates | 0 | - | 4.48 | 52,270 |
| Biggest Trading Partners - United States | 0 | - | 4.63 | 106,746 |
| U.S. States by Governor | 0 | - | 4.43 | 18,082 |
| U.S. Political Parties in History | 0 | - | 4.44 | 27,718 |
| U.S. Government Agencies | 0 | - | 4.44 | 19,717 |
| U.S. Presidents by Picture | 0 | - | 4.87 | 427,216 |
| Florida Pro Sport Teams | 0 | - | 4.61 | 11,867 |
| Boston Talk to English Translation Quiz | 0 | - | 4.59 | 56,045 |
| U.S. History Multiple Choice #2 | 0 | - | 4.32 | 25,094 |
| U.S. History Multiple Choice #1 | 0 | - | 4.31 | 22,264 |
| U.S. History Multiple Choice #4 | 0 | - | 4.24 | 25,626 |
| U.S. License Plates Picture Quiz | 0 | - | 4.61 | 53,004 |
| U.S. States with the Fewest Immigrants | 0 | - | 4.63 | 65,912 |
| U.S. States with the Highest Percentage of Farmland | 0 | - | 4.80 | 65,547 |
| U.S. States with the Lowest Percentage of Farmland | 0 | - | 4.74 | 55,254 |
| 10 U.S. States With The Highest Murder Rates | 0 | - | 4.47 | 54,574 |
| States and Provinces that touch the Rocky Mountains | 0 | - | 4.43 | 32,521 |
| Name a Valid U.S. State #2 | 0 | - | 4.63 | 77,181 |
| Walking Across U.S. State Borders with Hints | 0 | - | 4.74 | 35,085 |
| Name a Valid U.S. State #3 | 0 | - | 4.78 | 49,127 |
| U.S. States with the Longest International Borders | 0 | - | 4.78 | 45,858 |
| Longest U.S. State Borders | 0 | - | 4.67 | 39,959 |
| U.S. State Superlatives #1 | 0 | - | 4.47 | 87,591 |
| U.S. State Superlatives #2 | 0 | - | 4.53 | 40,684 |
| Top 10 U.S. States with the Highest Elevation | 0 | - | 4.51 | 67,916 |
| Top 10 U.S. States With the Most Tornadoes | 0 | - | 4.53 | 64,870 |
| Top 10 Least Religious U.S. States | 0 | - | 4.51 | 34,364 |
| Top 10 U.S. States by Public Transit | 0 | - | 4.77 | 63,875 |
| Top 10 U.S. States People are Leaving | 0 | - | 4.42 | 59,574 |
| U.S. States with the Lowest Average Elevation | 0 | - | 4.55 | 38,532 |
| U.S. States With the Highest Average Elevation | 0 | - | 4.61 | 32,800 |
| Top 10 U.S. States with the Most Precipitation | 0 | - | 4.46 | 41,749 |
| U.S. States with the Fewest Borders | 0 | - | 4.78 | 114,007 |
| U.S. States with the Most Borders | 0 | - | 4.53 | 62,330 |
| Canada Provinces and Territories | 0 | - | 5.00 | 343,983 |
| Canada Provinces Map Quiz | 0 | - | 4.99 | 642,033 |
| Georgia ... or Georgia? | 0 | - | 4.67 | 76,890 |
| U.S. Geography by Letter - C | 0 | - | 4.27 | 74,329 |
| U.S. Geography by Letter - A | 0 | - | 4.37 | 63,349 |
| U.S. Geography by Letter - D | 0 | - | 4.09 | 57,312 |
| U.S. Geography by Letter - T | 0 | - | 4.29 | 50,047 |
| U.S. Geography by Letter - P | 0 | - | 4.38 | 54,185 |
| U.S. Geography by Letter - M | 0 | - | 4.14 | 53,508 |
| U.S. Geography by Letter - L | 0 | - | 4.04 | 41,357 |
| U.S. Geography by Letter - G | 0 | - | 4.13 | 39,519 |
| U.S. Geography by Letter - R | 0 | - | 4.22 | 36,102 |
| U.S. Geography By Letter - H | 0 | - | 4.35 | 40,396 |
| Latin American Countries Map Quiz | 0 | - | 4.97 | 130,173 |
| Central America and Caribbean Map Quiz | 0 | - | 4.89 | 903,093 |
| Dominica Country Quiz | 0 | - | 4.81 | 19,873 |
| Territories of the United States | 0 | - | 4.80 | 52,482 |
| Third Most Common Language by U.S. State | 0 | - | 4.87 | 113,821 |
| Five Biggest Immigrant Groups by Decade in the US | 0 | - | 4.79 | 39,753 |
| Most Mentioned Enemies of the USA | 0 | - | 4.77 | 175,740 |
| American Legal Vocabulary | 0 | - | 4.40 | 33,966 |
| U.S. Cities by Picture #1 | 0 | - | 4.36 | 34,631 |
| Cities by Picture #2 | 0 | - | 4.19 | 35,195 |
| Major non-NATO U.S. Allies | 0 | - | 4.52 | 52,307 |
| The U.S. Government - How Does it Work? | 0 | - | 4.34 | 42,404 |
| First Names of U.S. Presidents | 0 | - | 4.86 | 382,441 |
| Famous People from California by Picture | 0 | - | 4.32 | 36,548 |
| California Groups of Things | 0 | - | 4.25 | 45,535 |
| Hawaiian Islands Map Quiz | 0 | - | 4.78 | 22,294 |
| New York Groups of Things | 0 | - | 4.35 | 63,988 |
| New York City Geography | 0 | - | 4.42 | 33,133 |
| The Life of Thomas Edison | 0 | - | 3.95 | 4,918 |
| Last 10 U.S. States Alphabetically | 0 | - | 4.35 | 74,932 |
| Top 10 Least Populous U.S. State Capitals | 0 | - | 4.52 | 21,541 |
| Flyover States | 0 | - | 4.52 | 29,541 |
| U.S. States With Double Letters | 0 | - | 4.55 | 24,183 |
| U.S. States Bigger than Their Neighbors | 0 | - | 4.28 | 76,276 |
| U.S. States by Wikipedia Descriptions #1 | 0 | - | 4.57 | 39,392 |
| U.S. States by Wikipedia Descriptions #2 | 0 | - | 4.48 | 37,138 |
| 50 States, 50 Cities - Easy Version | 0 | - | 4.39 | 128,521 |
| Top 10 Richest U.S. States by Median Income | 0 | - | 4.47 | 119,187 |
| Top 10 Least-Forested U.S. States | 0 | - | 4.50 | 46,578 |
| Countries of Europe in 1650 with a Map | 0 | - | 4.95 | 69,727 |
| The Only American Country ... | 0 | - | 4.92 | 121,855 |
| American Countries with the Shortest Names | 0 | - | 4.96 | 121,323 |
| North American Capitals - Map Quiz | 0 | - | 4.88 | 58,277 |
| All First-Level Subdivisions of North America on a Map | 0 | - | 4.97 | 64,460 |
| Name a Valid U.S. President #1 | 0 | - | 4.89 | 192,708 |
| Play-Doh Presidents | 0 | - | 5.00 | 82,511 |
| Who Did that Motown Song? | 0 | - | 4.48 | 13,063 |
| Regions of U.S. States | 0 | - | 4.37 | 44,003 |
| States, Provinces & Territories that Touch the Appalachian Mountains | 0 | - | 4.59 | 20,402 |
| 10 U.S. States with the Most Valuable Crops | 0 | - | 4.41 | 29,607 |
| U.S. States with the Lowest HDI | 0 | - | 4.47 | 28,882 |
| Which U.S. State - Multiple Choice | 0 | - | 4.48 | 20,327 |
| Movies by State | 0 | - | 4.27 | 40,573 |
| Canada Country Quiz | 0 | - | 4.54 | 132,714 |
