| United States Map Quiz | 0 | - | 4.98 | 4,172,711 |
| U.S. State Border Crossings | 0 | - | 4.97 | 96,933 |
| U.S. Citizenship Test Questions | 0 | - | 4.83 | 240,913 |
| U.S. Cities with the Most International Tourists | 0 | - | 4.88 | 76,018 |
| Cities and Towns of Massachusetts | 0 | - | 4.93 | 75,118 |
| Countries Larger Than Texas but With Fewer People | 0 | - | 4.92 | 40,306 |
| Name the U.S. National Parks | 0 | - | 4.86 | 60,548 |
| Total United States Immigration by Country | 0 | - | 4.91 | 112,495 |
| Most Common U.S. Last Names - Extreme | 0 | - | 4.94 | 175,657 |
| "Do Not Travel" Countries for U.S. Citizens | 0 | - | 4.97 | 246,812 |
| U.S. Cabinet Departments | 0 | - | 4.86 | 73,132 |
| Top 10 Non-English Languages Spoken in New York City | 0 | - | 4.85 | 66,782 |
| States of the U.S. in Alphabetical Order | 0 | - | 4.98 | 368,806 |
| Pixelated United States Map | 0 | - | 4.89 | 94,881 |
| Most-Visited Countries by Americans | 0 | - | 4.86 | 110,660 |
| Countries that Visit the United States the Most | 0 | - | 4.96 | 92,527 |
| The 13 Colonies Quiz | 0 | - | 4.97 | 119,138 |
| U.S. States with the Letter Y | 0 | - | 4.86 | 112,371 |
| 10 Southernmost U.S. States | 0 | - | 4.89 | 114,402 |
| U.S. States with Short Names | 0 | - | 4.91 | 150,452 |
| U.S. States that Start with M | 0 | - | 4.93 | 188,484 |
| U.S. States By Population | 0 | - | 4.92 | 154,213 |
| U.S. States that Start with N | 0 | - | 4.95 | 172,320 |
| U.S. States with Longest Names | 0 | - | 4.85 | 44,942 |
| 10 Northernmost U.S. States | 0 | - | 4.90 | 83,142 |
| U.S. States with a Unique First Letter | 0 | - | 4.96 | 88,932 |
| 10 Westernmost U.S. States | 0 | - | 4.95 | 64,570 |
| The Only Remaining U.S. State . . . | 0 | - | 4.93 | 66,165 |
| Top 10 Largest U.S. States by Area | 0 | - | 4.95 | 161,128 |
| Top 10 Smallest U.S. States by Area | 0 | - | 4.98 | 178,289 |
| Top 10 Poorest U.S. States by Median Income | 0 | - | 4.86 | 125,735 |
| U.S. States with the Highest Percentage of Hispanics | 0 | - | 4.85 | 69,856 |
| Top 10 Newest U.S. States | 0 | - | 4.85 | 86,696 |
| Top 10 U.S. States Where the Rent is Too Dang High | 0 | - | 4.85 | 68,028 |
| Countries of North America Quiz | 0 | - | 5.00 | 1,032,603 |
| Events in U.S. History | 0 | - | 4.41 | 28,844 |
| Embarrassing Chapters in US History | 0 | - | 4.17 | 33,210 |
| Canada Provinces and Territories | 0 | - | 5.00 | 346,739 |
| Canada Provinces Map Quiz | 0 | - | 4.99 | 645,078 |
| Countries that Beat the United States | 0 | - | 4.93 | 168,793 |
| Top 10 Most-Visited U.S. States | 0 | - | 4.90 | 102,545 |
| U.S. States with the Most Immigrants | 0 | - | 4.85 | 83,078 |
| The United States... or the United Kingdom? | 0 | - | 4.87 | 99,153 |
| U.S. History Multiple Choice #3 | 0 | - | 4.43 | 24,793 |
| Central America and Caribbean Map Quiz | 0 | - | 4.90 | 905,294 |
| North American Capitals - Map Quiz | 0 | - | 4.88 | 58,891 |
| All First-Level Subdivisions of North America on a Map | 0 | - | 4.97 | 65,232 |
| Old West History | 0 | - | 4.34 | 15,308 |
| Life of Benjamin Franklin | 0 | - | 4.24 | 6,536 |
| American Revolution - Multiple Choice | 0 | - | 4.34 | 19,993 |
| States of Mexico | 0 | - | 4.96 | 178,528 |
| Mexico States Map Quiz | 0 | - | 4.85 | 105,736 |
| Central American Countries | 0 | - | 4.98 | 157,466 |
| Caribbean Countries and Territories | 0 | - | 4.81 | 113,657 |
| Caribbean / Lesser Antilles Map Quiz | 0 | - | 4.99 | 150,904 |
| Territories of the United States | 0 | - | 4.80 | 52,650 |
| Five Biggest Immigrant Groups by Decade in the US | 0 | - | 4.79 | 39,912 |
| Most Mentioned Enemies of the USA | 0 | - | 4.77 | 176,188 |
| Major non-NATO U.S. Allies | 0 | - | 4.52 | 52,566 |
| New York City Geography | 0 | - | 4.43 | 33,194 |
| U.S. State Nicknames | 0 | - | 4.47 | 50,783 |
| Countries with American Expatriates | 0 | - | 4.53 | 42,684 |
| United States Landmarks Map Quiz | 0 | - | 4.55 | 40,290 |
| United States Country Quiz | 0 | - | 4.43 | 102,291 |
| Busiest Air Routes from the U.S. | 0 | - | 4.46 | 77,087 |
| Asian Countries Americans Travel to the Most | 0 | - | 4.75 | 60,237 |
| Three Real and One Fake - U.S. History | 0 | - | 4.33 | 25,851 |
| U.S. Presidents Quiz | 0 | - | 5.00 | 3,728,964 |
| Deadliest U.S. Wars | 0 | - | 4.89 | 191,908 |
| U.S. History Multiple Choice #2 | 0 | - | 4.33 | 25,137 |
| U.S. History Multiple Choice #1 | 0 | - | 4.29 | 22,293 |
| Valid Answer - U.S. History | 0 | - | 4.24 | 22,608 |
| U.S. History Multiple Choice #4 | 0 | - | 4.24 | 25,675 |
| Most-Visited Countries by Canadians | 0 | - | 4.83 | 39,648 |
| Countries Closest to Canada | 0 | - | 4.91 | 199,580 |
| U.S. History Multiple Choice #5 | 0 | - | 4.26 | 11,604 |
| U.S. Federal Holidays | 0 | - | 4.33 | 99,640 |
| Recommended Childhood Vaccines for Americans | 0 | - | 4.42 | 14,777 |
| Countries Closest to the U. S. | 0 | - | 4.41 | 210,649 |
| American Geography Quiz for Dummies | 0 | - | 4.41 | 69,471 |
| 75 Americans Named John | 0 | - | 4.41 | 23,983 |
| Top 10 Non-English Languages of Los Angeles | 0 | - | 4.43 | 60,140 |
| New England States | 0 | - | 4.51 | 59,906 |
| U.S. States by Land Area | 0 | - | 4.55 | 53,094 |
| Top 10 U.S. States by Inland Water Area | 0 | - | 4.53 | 38,129 |
| Add a Letter - Make a U.S. State | 0 | - | 4.70 | 83,193 |
| Top 10 Widest U.S. States East to West | 0 | - | 4.70 | 56,313 |
| Top 10 Tallest U.S. States North to South | 0 | - | 4.75 | 41,169 |
| U.S. States by Borders | 0 | - | 4.62 | 35,501 |
| Save Americans by Guessing U.S. States | 0 | - | 4.61 | 189,112 |
| 10 Easternmost U.S. States | 0 | - | 4.53 | 56,705 |
| The Only U.S. State ... #1 | 0 | - | 4.52 | 102,376 |
| 50 States, 50 Cities - Hard Version | 0 | - | 4.46 | 44,469 |
| U.S. States with the Most Expensive Home Prices | 0 | - | 4.48 | 99,961 |
| U.S. States with the Cheapest Home Prices | 0 | - | 4.74 | 33,254 |
| Top 10 Most African-American U.S. States | 0 | - | 4.46 | 74,846 |
| Top 10 Most Asian U.S. States | 0 | - | 4.80 | 75,498 |
| Top 10 Most Obese U.S. States | 0 | - | 4.54 | 81,529 |
| Top 10 Least Obese U.S. States | 0 | - | 4.75 | 73,885 |
| Top 10 Least-Educated U.S. States | 0 | - | 4.43 | 91,416 |
| Top 10 Most-Educated U.S. States | 0 | - | 4.48 | 85,318 |
| U.S. States with the Highest Rates of Homelessness | 0 | - | 4.43 | 52,604 |
| Top 10 Most White U.S. States | 0 | - | 4.49 | 83,127 |
| Top 10 Most German U.S. States | 0 | - | 4.48 | 60,309 |
| Countries that Beat Canada | 0 | - | 4.90 | 99,068 |
| Red State or Blue State Trait? | 0 | - | 4.42 | 55,749 |
| History of Pennsylvania | 0 | - | 4.16 | 7,168 |
| History of Virginia | 0 | - | 4.33 | 11,645 |
| U.S. States with the Highest Percentage of Farmland | 0 | - | 4.80 | 65,674 |
| U.S. States with the Lowest Percentage of Farmland | 0 | - | 4.70 | 61,391 |
| Top 10 U.S. States with the Lowest Life Expectancy | 0 | - | 4.62 | 45,281 |
| Top 10 U.S. States with the Highest Elevation | 0 | - | 4.51 | 67,992 |
| Top 10 U.S. States That Grow the Most Corn | 0 | - | 4.52 | 36,284 |
| Top 10 U.S. States People are Leaving | 0 | - | 4.44 | 70,682 |
| Top 10 U.S. States People are Moving To | 0 | - | 4.74 | 64,231 |
| U.S. States with the Lowest Average Elevation | 0 | - | 4.55 | 38,580 |
| U.S. States With the Highest Average Elevation | 0 | - | 4.61 | 32,845 |
| Flags of North and South America | 0 | - | 4.99 | 377,614 |
| Latin American Countries Map Quiz | 0 | - | 4.98 | 130,779 |
| South America Map Quiz | 0 | - | 5.00 | 1,557,732 |
| Belize Country Quiz | 0 | - | 4.85 | 21,110 |
| Saint Vincent and the Grenadines Country Quiz | 0 | - | 4.88 | 19,310 |
| Top U.S. Universities | 0 | - | 4.15 | 145,920 |
| Largest United States Airlines | 0 | - | 4.39 | 55,177 |
| Third Most Common Language by U.S. State | 0 | - | 4.87 | 114,016 |
| U.S. States by Governor | 0 | - | 4.43 | 18,118 |
| U.S. Political Parties in History | 0 | - | 4.44 | 27,776 |
| U.S. Government Agencies | 0 | - | 4.44 | 19,789 |
| Florida Pro Sport Teams | 0 | - | 4.61 | 11,911 |
| Boston Talk to English Translation Quiz | 0 | - | 4.59 | 56,281 |
| Canada Immigration by Country | 0 | - | 4.51 | 62,904 |
| Countries of Europe in 1650 with a Map | 0 | - | 4.95 | 70,644 |
| Georgia ... or Georgia? | 0 | - | 4.68 | 77,076 |
| The Only American Country ... | 0 | - | 4.92 | 122,296 |
| American Countries with the Shortest Names | 0 | - | 4.97 | 121,730 |
| Dominica Country Quiz | 0 | - | 4.81 | 19,951 |
| North America Capitals Quiz | 0 | - | 4.99 | 222,530 |
| USA Tourist Attractions by Description #1 | 0 | - | 4.14 | 27,206 |
| Which Island in the United States? | 0 | - | 4.29 | 29,816 |
| American Inventions #1 | 0 | - | 3.62 | 31,539 |
| American Inventions #2 | 0 | - | 3.93 | 15,902 |
| American Foods | 0 | - | 3.66 | 39,448 |
| Biggest U.S. Car Insurance Companies | 0 | - | 4.26 | 6,156 |
| Countries Across the Ocean from the U.S. | 0 | - | 3.95 | 32,347 |
| American Legal Vocabulary | 0 | - | 4.40 | 34,033 |
| U.S. Cities by Picture #1 | 0 | - | 4.36 | 34,748 |
| Cities by Picture #2 | 0 | - | 4.19 | 35,312 |
| U.S. Landmarks Picture Quiz | 0 | - | 4.27 | 14,832 |
| U.S. Groups of Four Quiz | 0 | - | 4.39 | 25,459 |
| U.S. Groups of Three Quiz | 0 | - | 4.04 | 20,987 |
| Branches of the U.S. Military | 0 | - | 4.40 | 24,535 |
| The U.S. Government - How Does it Work? | 0 | - | 4.34 | 42,488 |
| U.S. Presidents by Picture | 0 | - | 4.87 | 428,728 |
| First Names of U.S. Presidents | 0 | - | 4.86 | 383,782 |
| People on Money - United States | 0 | - | 4.31 | 63,443 |
| U.S. History Groups of Two | 0 | - | 4.23 | 44,600 |
| The Life of Thomas Edison | 0 | - | 3.95 | 4,930 |
| Last 10 U.S. States Alphabetically | 0 | - | 4.35 | 75,078 |
| Top 10 Least Populous U.S. State Capitals | 0 | - | 4.52 | 21,576 |
| Flyover States | 0 | - | 4.53 | 29,605 |
| U.S. States With Double Letters | 0 | - | 4.55 | 24,283 |
| U.S. States Bigger than Their Neighbors | 0 | - | 4.28 | 76,442 |
| 50 States, 50 Cities - Easy Version | 0 | - | 4.39 | 129,015 |
| U.S. States with the Most Gun Ownership | 0 | - | 4.45 | 29,808 |
| U.S. States with Oldest Median Age | 0 | - | 4.33 | 42,731 |
| Top 10 U.S. States with the Longest Commutes | 0 | - | 4.28 | 44,561 |
| US States with the Most Executions | 0 | - | 4.51 | 26,428 |
| Top 10 U.S. States with the Most Lighthouses | 0 | - | 4.61 | 29,176 |
| Top 10 Least White U.S. States | 0 | - | 4.17 | 48,301 |
| Slowest Growing U.S. States Since 1960 | 0 | - | 4.40 | 47,118 |
| Top 10 Least Happy U.S. States | 0 | - | 4.54 | 24,259 |
| Countries of Europe in 1815 With a Map | 0 | - | 4.99 | 151,485 |
| Countries of Europe in 1848 | 0 | - | 4.98 | 85,801 |
| Countries of Europe in 1870 with a Map | 0 | - | 4.95 | 65,921 |
| Every Country of Europe Since 1815 With a Map | 0 | - | 4.97 | 71,957 |
| Countries of Europe in 1360 with a Map | 0 | - | 4.99 | 57,670 |
| Name a Valid U.S. President #1 | 0 | - | 4.89 | 193,933 |
| Play-Doh Presidents | 0 | - | 5.00 | 82,929 |
| US States Quiz | 0 | - | 5.00 | 17,011,802 |
| 10 U.S. States with the Most Valuable Crops | 0 | - | 4.41 | 29,637 |
| U.S. States with the Lowest HDI | 0 | - | 4.47 | 28,940 |
| Which U.S. State - Multiple Choice | 0 | - | 4.48 | 20,378 |
| Top 10 U.S. States with the Highest Life Expectancy | 0 | - | 4.33 | 41,740 |
| Top 10 Least-Forested U.S. States | 0 | - | 4.50 | 46,697 |
| Canada Country Quiz | 0 | - | 4.55 | 133,114 |
| Canada Cities Map Quiz | 0 | - | 4.64 | 124,652 |
| Canada A-Z | 0 | - | 4.73 | 32,984 |
| Top 10 Biggest Economies in the Americas | 0 | - | 4.94 | 92,909 |
| American Countries With No Atlantic Coastline | 0 | - | 4.93 | 92,862 |
| History of Mexico | 0 | - | 4.52 | 15,372 |
| Countries of South America with an Empty Map | 0 | - | 4.95 | 105,561 |
| All First-Level Subdivisions of South America on a Map | 0 | - | 4.93 | 54,973 |
| Brazil States Map Quiz | 0 | - | 4.86 | 48,691 |
| States of Brazil | 0 | - | 4.98 | 89,928 |
| Fictional Characters from the Midwest by Picture | 0 | - | 4.04 | 19,239 |
| U.S. States by Picture #1 | 0 | - | 4.21 | 15,521 |
| All 3,143 Counties of the United States on a Map | 0 | - | 4.97 | 335,930 |
| Most-Visited U.S. Cities | 0 | - | 4.85 | 95,179 |
| Every U.S. Metro Area on a Map | 0 | - | 4.97 | 83,291 |
| Senators Who Ran For President | 0 | - | 4.24 | 17,089 |
