| United States Map Quiz | 0 | - | 4.98 | 4,147,322 |
| U.S. State Border Crossings | 0 | - | 4.97 | 96,166 |
| U.S. Citizenship Test Questions | 0 | - | 4.83 | 238,745 |
| U.S. Cities with the Most International Tourists | 0 | - | 4.88 | 75,118 |
| Cities and Towns of Massachusetts | 0 | - | 4.92 | 73,377 |
| Countries Larger Than Texas but With Fewer People | 0 | - | 4.92 | 39,656 |
| Name the U.S. National Parks | 0 | - | 4.86 | 59,509 |
| Total United States Immigration by Country | 0 | - | 4.91 | 110,955 |
| Most Common U.S. Last Names - Extreme | 0 | - | 4.94 | 173,671 |
| "Do Not Travel" Countries for U.S. Citizens | 0 | - | 4.97 | 242,039 |
| U.S. Cabinet Departments | 0 | - | 4.86 | 72,652 |
| Top 10 Non-English Languages Spoken in New York City | 0 | - | 4.84 | 65,865 |
| States of the U.S. in Alphabetical Order | 0 | - | 4.98 | 366,025 |
| Pixelated United States Map | 0 | - | 4.89 | 93,762 |
| Most-Visited Countries by Americans | 0 | - | 4.87 | 108,922 |
| Countries that Visit the United States the Most | 0 | - | 4.96 | 91,190 |
| The 13 Colonies Quiz | 0 | - | 4.97 | 117,270 |
| U.S. States with the Letter Y | 0 | - | 4.85 | 110,852 |
| 10 Southernmost U.S. States | 0 | - | 4.88 | 112,845 |
| U.S. States with Short Names | 0 | - | 4.91 | 148,262 |
| U.S. States that Start with M | 0 | - | 4.93 | 186,502 |
| U.S. States By Population | 0 | - | 4.92 | 152,734 |
| U.S. States that Start with N | 0 | - | 4.95 | 170,823 |
| U.S. States with Longest Names | 0 | - | 4.84 | 44,129 |
| 10 Northernmost U.S. States | 0 | - | 4.90 | 82,153 |
| U.S. States with a Unique First Letter | 0 | - | 4.96 | 87,894 |
| 10 Westernmost U.S. States | 0 | - | 4.95 | 63,953 |
| The Only Remaining U.S. State . . . | 0 | - | 4.92 | 65,206 |
| Top 10 Largest U.S. States by Area | 0 | - | 4.95 | 159,452 |
| Top 10 Smallest U.S. States by Area | 0 | - | 4.98 | 177,317 |
| Top 10 Poorest U.S. States by Median Income | 0 | - | 4.86 | 124,787 |
| U.S. States with the Highest Percentage of Hispanics | 0 | - | 4.85 | 69,271 |
| Top 10 Newest U.S. States | 0 | - | 4.85 | 85,932 |
| Top 10 U.S. States Where the Rent is Too Dang High | 0 | - | 4.85 | 67,138 |
| Countries of North America Quiz | 0 | - | 5.00 | 1,016,338 |
| Embarrassing Chapters in US History | 0 | - | 4.17 | 33,038 |
| Canada Provinces and Territories | 0 | - | 5.00 | 339,550 |
| Canada Provinces Map Quiz | 0 | - | 4.99 | 637,538 |
| Countries that Beat the United States | 0 | - | 4.93 | 166,063 |
| Top 10 Most-Visited U.S. States | 0 | - | 4.90 | 101,349 |
| U.S. States with the Most Immigrants | 0 | - | 4.85 | 82,159 |
| The United States... or the United Kingdom? | 0 | - | 4.87 | 98,079 |
| U.S. History Multiple Choice #3 | 0 | - | 4.43 | 24,675 |
| Central America and Caribbean Map Quiz | 0 | - | 4.89 | 900,605 |
| North American Capitals - Map Quiz | 0 | - | 4.87 | 57,318 |
| All First-Level Subdivisions of North America on a Map | 0 | - | 4.97 | 63,379 |
| Old West History | 0 | - | 4.33 | 15,236 |
| Life of Benjamin Franklin | 0 | - | 4.24 | 6,506 |
| American Revolution - Multiple Choice | 0 | - | 4.34 | 19,886 |
| States of Mexico | 0 | - | 4.95 | 174,416 |
| Mexico States Map Quiz | 0 | - | 4.84 | 104,117 |
| Central American Countries | 0 | - | 4.98 | 155,446 |
| Caribbean / Lesser Antilles Map Quiz | 0 | - | 4.99 | 146,642 |
| Territories of the United States | 0 | - | 4.79 | 52,242 |
| Five Biggest Immigrant Groups by Decade in the US | 0 | - | 4.78 | 39,467 |
| Most Mentioned Enemies of the USA | 0 | - | 4.77 | 174,916 |
| Major non-NATO U.S. Allies | 0 | - | 4.52 | 51,921 |
| New York City Geography | 0 | - | 4.42 | 33,009 |
| Events in U.S. History | 0 | - | 4.40 | 28,550 |
| U.S. State Nicknames | 0 | - | 4.47 | 50,376 |
| Countries with American Expatriates | 0 | - | 4.53 | 42,513 |
| United States Landmarks Map Quiz | 0 | - | 4.55 | 40,119 |
| United States Country Quiz | 0 | - | 4.43 | 100,966 |
| Busiest Air Routes from the U.S. | 0 | - | 4.46 | 76,709 |
| Asian Countries Americans Travel to the Most | 0 | - | 4.75 | 59,771 |
| U.S. Presidents Quiz | 0 | - | 5.00 | 3,671,152 |
| Deadliest U.S. Wars | 0 | - | 4.89 | 189,669 |
| U.S. History Multiple Choice #2 | 0 | - | 4.32 | 25,019 |
| U.S. History Multiple Choice #1 | 0 | - | 4.31 | 22,189 |
| Valid Answer - U.S. History | 0 | - | 4.24 | 22,482 |
| U.S. History Multiple Choice #4 | 0 | - | 4.26 | 25,528 |
| Most-Visited Countries by Canadians | 0 | - | 4.82 | 39,158 |
| Countries Closest to Canada | 0 | - | 4.90 | 197,660 |
| U.S. History Multiple Choice #5 | 0 | - | 4.26 | 11,515 |
| U.S. Federal Holidays | 0 | - | 4.33 | 99,185 |
| Recommended Childhood Vaccines for Americans | 0 | - | 4.42 | 14,673 |
| Countries Closest to the U. S. | 0 | - | 4.41 | 208,362 |
| American Geography Quiz for Dummies | 0 | - | 4.41 | 68,896 |
| Top 10 Non-English Languages of Los Angeles | 0 | - | 4.42 | 59,707 |
| New England States | 0 | - | 4.51 | 59,747 |
| U.S. States by Land Area | 0 | - | 4.61 | 52,612 |
| Top 10 U.S. States by Inland Water Area | 0 | - | 4.53 | 37,941 |
| Add a Letter - Make a U.S. State | 0 | - | 4.72 | 82,531 |
| Top 10 Widest U.S. States East to West | 0 | - | 4.70 | 55,797 |
| Top 10 Tallest U.S. States North to South | 0 | - | 4.74 | 40,772 |
| U.S. States by Borders | 0 | - | 4.63 | 35,177 |
| Save Americans by Guessing U.S. States | 0 | - | 4.61 | 183,684 |
| 10 Easternmost U.S. States | 0 | - | 4.53 | 56,347 |
| The Only U.S. State ... #1 | 0 | - | 4.52 | 101,765 |
| 50 States, 50 Cities - Hard Version | 0 | - | 4.46 | 44,072 |
| U.S. States with the Most Expensive Home Prices | 0 | - | 4.48 | 99,434 |
| U.S. States with the Cheapest Home Prices | 0 | - | 4.70 | 32,883 |
| Top 10 Most African-American U.S. States | 0 | - | 4.46 | 74,496 |
| Top 10 Most Asian U.S. States | 0 | - | 4.80 | 75,003 |
| Top 10 Most Obese U.S. States | 0 | - | 4.54 | 81,273 |
| Top 10 Least Obese U.S. States | 0 | - | 4.75 | 73,526 |
| Top 10 Least-Educated U.S. States | 0 | - | 4.43 | 90,533 |
| Top 10 Most-Educated U.S. States | 0 | - | 4.48 | 84,533 |
| U.S. States with the Highest Rates of Homelessness | 0 | - | 4.43 | 52,254 |
| Top 10 Most White U.S. States | 0 | - | 4.49 | 82,126 |
| Top 10 Most German U.S. States | 0 | - | 4.48 | 59,750 |
| Countries that Beat Canada | 0 | - | 4.90 | 87,082 |
| Red State or Blue State Trait? | 0 | - | 4.42 | 55,105 |
| History of Pennsylvania | 0 | - | 4.16 | 7,106 |
| History of Virginia | 0 | - | 4.31 | 11,571 |
| U.S. States with the Highest Percentage of Farmland | 0 | - | 4.80 | 65,357 |
| U.S. States with the Lowest Percentage of Farmland | 0 | - | 4.74 | 55,093 |
| Top 10 U.S. States with the Lowest Life Expectancy | 0 | - | 4.67 | 45,020 |
| Top 10 U.S. States with the Highest Elevation | 0 | - | 4.51 | 67,812 |
| Top 10 U.S. States That Grow the Most Corn | 0 | - | 4.52 | 36,073 |
| Top 10 U.S. States People are Leaving | 0 | - | 4.42 | 59,188 |
| Top 10 U.S. States People are Moving To | 0 | - | 4.73 | 63,670 |
| U.S. States with the Lowest Average Elevation | 0 | - | 4.55 | 38,428 |
| U.S. States With the Highest Average Elevation | 0 | - | 4.61 | 32,700 |
| Georgia ... or Georgia? | 0 | - | 4.67 | 76,569 |
| Flags of North and South America | 0 | - | 4.99 | 369,679 |
| Latin American Countries Map Quiz | 0 | - | 4.97 | 128,744 |
| South America Map Quiz | 0 | - | 5.00 | 1,543,945 |
| Belize Country Quiz | 0 | - | 4.85 | 20,867 |
| Saint Vincent and the Grenadines Country Quiz | 0 | - | 4.88 | 19,108 |
| Top U.S. Universities | 0 | - | 4.15 | 144,448 |
| Largest United States Airlines | 0 | - | 4.39 | 54,909 |
| Third Most Common Language by U.S. State | 0 | - | 4.87 | 113,509 |
| U.S. States by Governor | 0 | - | 4.43 | 18,010 |
| U.S. Political Parties in History | 0 | - | 4.44 | 27,611 |
| U.S. Government Agencies | 0 | - | 4.44 | 19,592 |
| Florida Pro Sport Teams | 0 | - | 4.61 | 11,784 |
| Boston Talk to English Translation Quiz | 0 | - | 4.59 | 55,813 |
| Canada Immigration by Country | 0 | - | 4.51 | 62,349 |
| Countries of Europe in 1650 with a Map | 0 | - | 4.95 | 68,186 |
| The Only American Country ... | 0 | - | 4.92 | 121,117 |
| American Countries with the Shortest Names | 0 | - | 4.96 | 120,683 |
| Dominica Country Quiz | 0 | - | 4.81 | 19,728 |
| North America Capitals Quiz | 0 | - | 4.99 | 218,003 |
| USA Tourist Attractions by Description #1 | 0 | - | 4.14 | 27,078 |
| Which Island in the United States? | 0 | - | 4.29 | 29,306 |
| American Inventions #1 | 0 | - | 3.63 | 31,481 |
| American Inventions #2 | 0 | - | 3.93 | 15,841 |
| American Foods | 0 | - | 3.66 | 39,321 |
| Biggest U.S. Car Insurance Companies | 0 | - | 4.26 | 6,117 |
| Countries Across the Ocean from the U.S. | 0 | - | 3.94 | 32,135 |
| American Legal Vocabulary | 0 | - | 4.40 | 33,834 |
| U.S. Cities by Picture #1 | 0 | - | 4.36 | 34,425 |
| Cities by Picture #2 | 0 | - | 4.19 | 35,001 |
| U.S. Landmarks Picture Quiz | 0 | - | 4.26 | 14,697 |
| U.S. Groups of Four Quiz | 0 | - | 4.39 | 25,246 |
| U.S. Groups of Three Quiz | 0 | - | 4.04 | 20,835 |
| Branches of the U.S. Military | 0 | - | 4.40 | 24,238 |
| The U.S. Government - How Does it Work? | 0 | - | 4.34 | 42,251 |
| U.S. Presidents by Picture | 0 | - | 4.87 | 424,766 |
| First Names of U.S. Presidents | 0 | - | 4.85 | 380,238 |
| People on Money - United States | 0 | - | 4.31 | 63,256 |
| U.S. History Groups of Two | 0 | - | 4.23 | 44,326 |
| The Life of Thomas Edison | 0 | - | 3.95 | 4,904 |
| Last 10 U.S. States Alphabetically | 0 | - | 4.35 | 74,696 |
| Top 10 Least Populous U.S. State Capitals | 0 | - | 4.52 | 21,484 |
| Flyover States | 0 | - | 4.52 | 29,441 |
| U.S. States With Double Letters | 0 | - | 4.54 | 23,998 |
| U.S. States Bigger than Their Neighbors | 0 | - | 4.27 | 75,949 |
| 50 States, 50 Cities - Easy Version | 0 | - | 4.39 | 128,138 |
| U.S. States with the Most Gun Ownership | 0 | - | 4.44 | 29,621 |
| U.S. States with Oldest Median Age | 0 | - | 4.33 | 42,442 |
| Top 10 U.S. States with the Longest Commutes | 0 | - | 4.28 | 44,249 |
| US States with the Most Executions | 0 | - | 4.51 | 26,365 |
| Top 10 U.S. States with the Most Lighthouses | 0 | - | 4.61 | 28,977 |
| Top 10 Least White U.S. States | 0 | - | 4.17 | 47,766 |
| Slowest Growing U.S. States Since 1960 | 0 | - | 4.42 | 45,074 |
| Top 10 Least Happy U.S. States | 0 | - | 4.54 | 24,070 |
| Countries of Europe in 1815 With a Map | 0 | - | 4.99 | 149,441 |
| Countries of Europe in 1848 | 0 | - | 4.98 | 75,787 |
| Countries of Europe in 1870 with a Map | 0 | - | 4.95 | 63,894 |
| Every Country of Europe Since 1815 With a Map | 0 | - | 4.98 | 70,427 |
| Countries of Europe in 1360 with a Map | 0 | - | 4.99 | 56,314 |
| Caribbean Countries and Territories | 0 | - | 4.80 | 112,509 |
| Name a Valid U.S. President #1 | 0 | - | 4.89 | 190,559 |
| Play-Doh Presidents | 0 | - | 5.00 | 81,896 |
| US States Quiz | 0 | - | 5.00 | 16,767,141 |
| 10 U.S. States with the Most Valuable Crops | 0 | - | 4.41 | 29,517 |
| U.S. States with the Lowest HDI | 0 | - | 4.47 | 28,807 |
| Which U.S. State - Multiple Choice | 0 | - | 4.48 | 20,237 |
| Top 10 U.S. States with the Highest Life Expectancy | 0 | - | 4.33 | 41,606 |
| Top 10 Least-Forested U.S. States | 0 | - | 4.50 | 46,393 |
| Canada Country Quiz | 0 | - | 4.55 | 132,026 |
| Canada Cities Map Quiz | 0 | - | 4.63 | 123,828 |
| Canada A-Z | 0 | - | 4.73 | 32,712 |
| Countries of the Mongol Empire on a Map | 0 | - | 4.99 | 106,249 |
| Top 10 Biggest Economies in the Americas | 0 | - | 4.93 | 91,397 |
| American Countries With No Atlantic Coastline | 0 | - | 4.94 | 92,099 |
| History of Mexico | 0 | - | 4.58 | 15,253 |
| Countries of South America with an Empty Map | 0 | - | 4.94 | 104,480 |
| All First-Level Subdivisions of South America on a Map | 0 | - | 4.92 | 53,317 |
| Brazil States Map Quiz | 0 | - | 4.85 | 47,600 |
| States of Brazil | 0 | - | 4.97 | 86,981 |
| Fictional Characters from the Midwest by Picture | 0 | - | 4.04 | 19,169 |
| U.S. States by Picture #1 | 0 | - | 4.21 | 15,385 |
| All 3,143 Counties of the United States on a Map | 0 | - | 4.97 | 329,450 |
| Most-Visited U.S. Cities | 0 | - | 4.85 | 92,907 |
| Every U.S. Metro Area on a Map | 0 | - | 4.97 | 81,173 |
| Senators Who Ran For President | 0 | - | 4.24 | 17,012 |
| U.S. Electoral College Landslides | 0 | - | 4.35 | 22,011 |
