| U.S. Citizenship Test Questions | 0 | - | 4.83 | 238,767 |
| United States Map Quiz | 0 | - | 4.98 | 4,147,653 |
| U.S. State Border Crossings | 0 | - | 4.97 | 96,180 |
| U.S. Cities with the Most International Tourists | 0 | - | 4.88 | 75,132 |
| Cities and Towns of Massachusetts | 0 | - | 4.92 | 73,402 |
| Countries Larger Than Texas but With Fewer People | 0 | - | 4.92 | 39,663 |
| Name the U.S. National Parks | 0 | - | 4.86 | 59,529 |
| Total United States Immigration by Country | 0 | - | 4.91 | 110,980 |
| Most Common U.S. Last Names - Extreme | 0 | - | 4.94 | 173,702 |
| "Do Not Travel" Countries for U.S. Citizens | 0 | - | 4.97 | 242,110 |
| U.S. Cabinet Departments | 0 | - | 4.86 | 72,665 |
| Top 10 Non-English Languages Spoken in New York City | 0 | - | 4.84 | 65,876 |
| States of the U.S. in Alphabetical Order | 0 | - | 4.98 | 366,067 |
| Major non-NATO U.S. Allies | 0 | - | 4.52 | 51,928 |
| Pixelated United States Map | 0 | - | 4.89 | 93,782 |
| Most-Visited Countries by Americans | 0 | - | 4.87 | 108,944 |
| Countries that Visit the United States the Most | 0 | - | 4.96 | 91,203 |
| The 13 Colonies Quiz | 0 | - | 4.97 | 117,294 |
| U.S. States with the Letter Y | 0 | - | 4.85 | 110,875 |
| 10 Southernmost U.S. States | 0 | - | 4.88 | 112,874 |
| U.S. States with Short Names | 0 | - | 4.91 | 148,297 |
| U.S. States that Start with M | 0 | - | 4.93 | 186,535 |
| U.S. States By Population | 0 | - | 4.92 | 152,753 |
| U.S. States that Start with N | 0 | - | 4.95 | 170,849 |
| U.S. States with Longest Names | 0 | - | 4.84 | 44,147 |
| 10 Northernmost U.S. States | 0 | - | 4.90 | 82,175 |
| U.S. States with a Unique First Letter | 0 | - | 4.96 | 87,911 |
| 10 Westernmost U.S. States | 0 | - | 4.95 | 63,964 |
| The Only Remaining U.S. State . . . | 0 | - | 4.92 | 65,229 |
| Top 10 Largest U.S. States by Area | 0 | - | 4.95 | 159,500 |
| Top 10 Smallest U.S. States by Area | 0 | - | 4.98 | 177,361 |
| Top 10 Poorest U.S. States by Median Income | 0 | - | 4.86 | 124,829 |
| U.S. States with the Highest Percentage of Hispanics | 0 | - | 4.85 | 69,304 |
| Top 10 Newest U.S. States | 0 | - | 4.85 | 85,960 |
| Top 10 U.S. States Where the Rent is Too Dang High | 0 | - | 4.85 | 67,177 |
| Countries of North America Quiz | 0 | - | 5.00 | 1,016,644 |
| Canada Provinces and Territories | 0 | - | 5.00 | 339,661 |
| Canada Provinces Map Quiz | 0 | - | 4.99 | 637,673 |
| Countries that Beat the United States | 0 | - | 4.93 | 166,089 |
| Top 10 Most-Visited U.S. States | 0 | - | 4.90 | 101,376 |
| U.S. States with the Most Immigrants | 0 | - | 4.85 | 82,178 |
| The United States... or the United Kingdom? | 0 | - | 4.87 | 98,092 |
| Central America and Caribbean Map Quiz | 0 | - | 4.89 | 900,658 |
| North American Capitals - Map Quiz | 0 | - | 4.87 | 57,337 |
| All First-Level Subdivisions of North America on a Map | 0 | - | 4.97 | 63,421 |
| U.S. Federal Holidays | 0 | - | 4.33 | 99,219 |
| States of Mexico | 0 | - | 4.95 | 174,479 |
| Mexico States Map Quiz | 0 | - | 4.84 | 104,147 |
| Central American Countries | 0 | - | 4.98 | 155,477 |
| Caribbean / Lesser Antilles Map Quiz | 0 | - | 4.99 | 146,688 |
| Territories of the United States | 0 | - | 4.79 | 52,245 |
| Five Biggest Immigrant Groups by Decade in the US | 0 | - | 4.78 | 39,476 |
| Most Mentioned Enemies of the USA | 0 | - | 4.77 | 174,936 |
| New York City Geography | 0 | - | 4.42 | 33,012 |
| U.S. State Nicknames | 0 | - | 4.47 | 50,378 |
| Countries with American Expatriates | 0 | - | 4.53 | 42,515 |
| United States Landmarks Map Quiz | 0 | - | 4.55 | 40,120 |
| United States Country Quiz | 0 | - | 4.43 | 100,992 |
| Busiest Air Routes from the U.S. | 0 | - | 4.46 | 76,715 |
| Canada A-Z | 0 | - | 4.73 | 32,716 |
| Asian Countries Americans Travel to the Most | 0 | - | 4.75 | 59,779 |
| Biggest U.S. Car Insurance Companies | 0 | - | 4.26 | 6,118 |
| American Legal Vocabulary | 0 | - | 4.40 | 33,840 |
| Most-Visited Countries by Canadians | 0 | - | 4.82 | 39,162 |
| Countries Closest to Canada | 0 | - | 4.90 | 197,685 |
| Recommended Childhood Vaccines for Americans | 0 | - | 4.42 | 14,676 |
| Countries Closest to the U. S. | 0 | - | 4.41 | 208,391 |
| American Geography Quiz for Dummies | 0 | - | 4.41 | 68,906 |
| Top 10 Non-English Languages of Los Angeles | 0 | - | 4.42 | 59,713 |
| New England States | 0 | - | 4.51 | 59,753 |
| U.S. States by Land Area | 0 | - | 4.61 | 52,620 |
| Top 10 U.S. States by Inland Water Area | 0 | - | 4.53 | 37,942 |
| Add a Letter - Make a U.S. State | 0 | - | 4.72 | 82,541 |
| Top 10 Widest U.S. States East to West | 0 | - | 4.70 | 55,806 |
| Top 10 Tallest U.S. States North to South | 0 | - | 4.74 | 40,778 |
| U.S. States by Borders | 0 | - | 4.63 | 35,181 |
| Save Americans by Guessing U.S. States | 0 | - | 4.61 | 183,747 |
| 10 Easternmost U.S. States | 0 | - | 4.53 | 56,354 |
| The Only U.S. State ... #1 | 0 | - | 4.52 | 101,793 |
| 50 States, 50 Cities - Hard Version | 0 | - | 4.46 | 44,075 |
| U.S. States with the Most Expensive Home Prices | 0 | - | 4.48 | 99,445 |
| U.S. States with the Cheapest Home Prices | 0 | - | 4.70 | 32,888 |
| Top 10 Most African-American U.S. States | 0 | - | 4.46 | 74,503 |
| Top 10 Most Asian U.S. States | 0 | - | 4.80 | 75,013 |
| Top 10 Most Obese U.S. States | 0 | - | 4.54 | 81,278 |
| Top 10 Least Obese U.S. States | 0 | - | 4.75 | 73,538 |
| Top 10 Least-Educated U.S. States | 0 | - | 4.43 | 90,557 |
| Top 10 Most-Educated U.S. States | 0 | - | 4.48 | 84,545 |
| U.S. States with the Highest Rates of Homelessness | 0 | - | 4.43 | 52,260 |
| Top 10 Most White U.S. States | 0 | - | 4.49 | 82,148 |
| Top 10 Most German U.S. States | 0 | - | 4.48 | 59,762 |
| Slowest Growing U.S. States Since 1960 | 0 | - | 4.42 | 45,911 |
| Countries that Beat Canada | 0 | - | 4.90 | 87,099 |
| Countries with the Longest High Speed Rail Networks | 0 | - | 4.91 | 65,358 |
| Cities with the Most Metro Rail Stations | 0 | - | 4.89 | 102,004 |
| Red State or Blue State Trait? | 0 | - | 4.42 | 55,112 |
| U.S. States with the Highest Percentage of Farmland | 0 | - | 4.80 | 65,359 |
| U.S. States with the Lowest Percentage of Farmland | 0 | - | 4.74 | 55,101 |
| Top 10 U.S. States with the Lowest Life Expectancy | 0 | - | 4.67 | 45,026 |
| Top 10 U.S. States with the Highest Elevation | 0 | - | 4.51 | 67,813 |
| Top 10 U.S. States That Grow the Most Corn | 0 | - | 4.52 | 36,075 |
| Top 10 U.S. States People are Leaving | 0 | - | 4.42 | 59,198 |
| Top 10 U.S. States People are Moving To | 0 | - | 4.73 | 63,679 |
| U.S. States with the Lowest Average Elevation | 0 | - | 4.55 | 38,430 |
| U.S. States With the Highest Average Elevation | 0 | - | 4.61 | 32,700 |
| Georgia ... or Georgia? | 0 | - | 4.67 | 76,574 |
| Flags of North and South America | 0 | - | 4.99 | 369,836 |
| Latin American Countries Map Quiz | 0 | - | 4.97 | 128,759 |
| South America Map Quiz | 0 | - | 5.00 | 1,544,124 |
| Belize Country Quiz | 0 | - | 4.85 | 20,870 |
| Saint Vincent and the Grenadines Country Quiz | 0 | - | 4.88 | 19,108 |
| Top U.S. Universities | 0 | - | 4.15 | 144,473 |
| Largest United States Airlines | 0 | - | 4.39 | 54,914 |
| Third Most Common Language by U.S. State | 0 | - | 4.87 | 113,517 |
| U.S. States by Governor | 0 | - | 4.43 | 18,012 |
| U.S. Political Parties in History | 0 | - | 4.44 | 27,615 |
| U.S. Government Agencies | 0 | - | 4.44 | 19,600 |
| Florida Pro Sport Teams | 0 | - | 4.61 | 11,786 |
| Boston Talk to English Translation Quiz | 0 | - | 4.59 | 55,819 |
| Embarrassing Chapters in US History | 0 | - | 4.17 | 33,042 |
| Canada Immigration by Country | 0 | - | 4.51 | 62,353 |
| Most Guessed Cities in Europe - Not Capitals | 0 | - | 4.82 | 87,072 |
| The Only American Country ... | 0 | - | 4.92 | 121,136 |
| American Countries with the Shortest Names | 0 | - | 4.96 | 120,705 |
| Dominica Country Quiz | 0 | - | 4.81 | 19,731 |
| North America Capitals Quiz | 0 | - | 4.99 | 218,078 |
| USA Tourist Attractions by Description #1 | 0 | - | 4.14 | 27,078 |
| Which Island in the United States? | 0 | - | 4.29 | 29,310 |
| American Foods | 0 | - | 3.66 | 39,322 |
| Countries Across the Ocean from the U.S. | 0 | - | 3.94 | 32,142 |
| U.S. Cities by Picture #1 | 0 | - | 4.36 | 34,427 |
| Cities by Picture #2 | 0 | - | 4.19 | 35,003 |
| U.S. Landmarks Picture Quiz | 0 | - | 4.26 | 14,698 |
| U.S. Groups of Four Quiz | 0 | - | 4.39 | 25,247 |
| U.S. Groups of Three Quiz | 0 | - | 4.04 | 20,841 |
| The U.S. Government - How Does it Work? | 0 | - | 4.34 | 42,254 |
| Old West History | 0 | - | 4.33 | 15,237 |
| Life of Benjamin Franklin | 0 | - | 4.24 | 6,507 |
| American Revolution - Multiple Choice | 0 | - | 4.34 | 19,889 |
| U.S. History Multiple Choice #3 | 0 | - | 4.43 | 24,679 |
| Last 10 U.S. States Alphabetically | 0 | - | 4.35 | 74,708 |
| Top 10 Least Populous U.S. State Capitals | 0 | - | 4.52 | 21,489 |
| Flyover States | 0 | - | 4.52 | 29,444 |
| U.S. States With Double Letters | 0 | - | 4.54 | 24,003 |
| U.S. States Bigger than Their Neighbors | 0 | - | 4.27 | 75,961 |
| 50 States, 50 Cities - Easy Version | 0 | - | 4.39 | 128,147 |
| U.S. States with the Most Gun Ownership | 0 | - | 4.44 | 29,624 |
| U.S. States with Oldest Median Age | 0 | - | 4.33 | 42,446 |
| Top 10 U.S. States with the Longest Commutes | 0 | - | 4.28 | 44,253 |
| US States with the Most Executions | 0 | - | 4.51 | 26,368 |
| Top 10 U.S. States with the Most Lighthouses | 0 | - | 4.61 | 28,978 |
| Top 10 Least White U.S. States | 0 | - | 4.17 | 47,775 |
| Top 10 Least Happy U.S. States | 0 | - | 4.54 | 24,071 |
| European Geography By Letter - P #1 | 0 | - | 4.81 | 96,598 |
| European Geography By Letter - B #2 | 0 | - | 4.84 | 76,647 |
| Category Elimination - European Geography #3 | 0 | - | 4.85 | 80,270 |
| Asian Geography By Letter - B | 0 | - | 4.85 | 66,164 |
| Caribbean Countries and Territories | 0 | - | 4.80 | 112,521 |
| US States Quiz | 0 | - | 5.00 | 16,771,289 |
| 10 U.S. States with the Most Valuable Crops | 0 | - | 4.41 | 29,518 |
| U.S. States with the Lowest HDI | 0 | - | 4.47 | 28,811 |
| Which U.S. State - Multiple Choice | 0 | - | 4.48 | 20,240 |
| Top 10 U.S. States with the Highest Life Expectancy | 0 | - | 4.33 | 41,608 |
| Top 10 Least-Forested U.S. States | 0 | - | 4.50 | 46,399 |
| Canada Country Quiz | 0 | - | 4.55 | 132,047 |
| Canada Cities Map Quiz | 0 | - | 4.63 | 123,837 |
| Top 10 Biggest Economies in the Americas | 0 | - | 4.93 | 91,414 |
| American Countries With No Atlantic Coastline | 0 | - | 4.94 | 92,106 |
| U.S. Geography by Letter - B | 0 | - | 4.53 | 68,958 |
| U.S. Geography by Letter - S | 0 | - | 4.55 | 52,447 |
| Famous Mexicans and Mexican-Americans | 0 | - | 4.15 | 16,919 |
| History of Mexico | 0 | - | 4.58 | 15,256 |
| Countries of South America with an Empty Map | 0 | - | 4.94 | 104,499 |
| All First-Level Subdivisions of South America on a Map | 0 | - | 4.92 | 53,337 |
| Brazil States Map Quiz | 0 | - | 4.85 | 47,612 |
| States of Brazil | 0 | - | 4.97 | 87,052 |
| Fictional Characters from the Midwest by Picture | 0 | - | 4.04 | 19,169 |
| Two Letter U.S. State Abbreviations | 0 | - | 4.19 | 745,034 |
| U.S. States by Picture #1 | 0 | - | 4.21 | 15,389 |
| All 3,143 Counties of the United States on a Map | 0 | - | 4.97 | 329,583 |
| Most-Visited U.S. Cities | 0 | - | 4.85 | 92,947 |
| Every U.S. Metro Area on a Map | 0 | - | 4.97 | 81,205 |
| Senators Who Ran For President | 0 | - | 4.24 | 17,015 |
| U.S. Electoral College Landslides | 0 | - | 4.35 | 22,011 |
| California Multiple Choice | 0 | - | 4.40 | 28,063 |
| Geography of California | 0 | - | 4.25 | 10,526 |
| California Pro Sport Teams | 0 | - | 4.19 | 22,664 |
| San Francisco Trivia | 0 | - | 4.32 | 15,679 |
| San Francisco A-Z | 0 | - | 4.18 | 9,543 |
| Florida Multiple Choice | 0 | - | 4.33 | 10,170 |
| Chicago City Trivia | 0 | - | 4.31 | 31,408 |
| Boston City Trivia | 0 | - | 4.38 | 24,148 |
| New York Pro Sport Teams | 0 | - | 4.32 | 25,833 |
| Texas Pro Sport Teams | 0 | - | 4.19 | 16,793 |
| History of Pennsylvania | 0 | - | 4.16 | 7,107 |
| History of Virginia | 0 | - | 4.31 | 11,572 |
| Washington State by Picture | 0 | - | 4.26 | 7,703 |
| Events in U.S. History | 0 | - | 4.40 | 28,563 |
| African-American Historical Figures | 0 | - | 4.18 | 17,155 |
| Capitals of Canadian Provinces | 0 | - | 4.85 | 88,701 |
