| United States Map Quiz | 0 | - | 4.98 | 4,050,268 |
| U.S. State Border Crossings | 0 | - | 4.96 | 86,535 |
| U.S. Citizenship Test Questions | 0 | - | 4.83 | 231,517 |
| U.S. Cities with the Most International Tourists | 0 | - | 4.87 | 70,763 |
| Cities and Towns of Massachusetts | 0 | - | 4.90 | 68,323 |
| U.S. National Parks Quiz | 0 | - | 4.81 | 50,795 |
| Total United States Immigration by Country | 0 | - | 4.89 | 104,296 |
| Most Common U.S. Last Names - Extreme | 0 | - | 4.95 | 166,202 |
| "Do Not Travel" Countries for U.S. Citizens | 0 | - | 4.94 | 201,666 |
| U.S. Cabinet Departments | 0 | - | 4.86 | 70,520 |
| Top 10 Non-English Languages Spoken in New York City | 0 | - | 4.83 | 61,795 |
| States of the U.S. in Alphabetical Order | 0 | - | 4.97 | 355,500 |
| Countries Larger Than Texas but With Fewer People | 0 | - | 4.89 | 25,211 |
| Pixelated United States Map | 0 | - | 4.89 | 88,521 |
| Most-Visited Countries by Americans | 0 | - | 4.86 | 101,681 |
| Countries that Visit the United States the Most | 0 | - | 4.95 | 85,442 |
| The 13 Colonies Quiz | 0 | - | 4.97 | 109,979 |
| U.S. States with the Letter Y | 0 | - | 4.84 | 104,574 |
| 10 Southernmost U.S. States | 0 | - | 4.87 | 106,750 |
| U.S. States with Short Names | 0 | - | 4.89 | 140,311 |
| U.S. States that Start with M | 0 | - | 4.93 | 178,029 |
| U.S. States By Population | 0 | - | 4.90 | 136,929 |
| U.S. States that Start with N | 0 | - | 4.94 | 164,104 |
| U.S. States with Longest Names | 0 | - | 4.87 | 40,510 |
| 10 Northernmost U.S. States | 0 | - | 4.90 | 78,950 |
| U.S. States with a Unique First Letter | 0 | - | 4.95 | 83,465 |
| 10 Westernmost U.S. States | 0 | - | 4.95 | 61,382 |
| The Only Remaining U.S. State . . . | 0 | - | 4.94 | 60,896 |
| Top 10 Largest U.S. States by Area | 0 | - | 4.94 | 153,607 |
| Top 10 Smallest U.S. States by Area | 0 | - | 4.98 | 173,527 |
| Top 10 Poorest U.S. States by Median Income | 0 | - | 4.86 | 120,124 |
| U.S. States with the Highest Percentage of Hispanics | 0 | - | 4.83 | 66,886 |
| Top 10 Newest U.S. States | 0 | - | 4.84 | 83,013 |
| Top 10 U.S. States Where the Rent is Too Dang High | 0 | - | 4.83 | 63,123 |
| Embarrassing Chapters in US History | 0 | - | 4.19 | 32,387 |
| Countries of North America Quiz | 0 | - | 5.00 | 951,826 |
| Countries that Beat the United States | 0 | - | 4.93 | 157,545 |
| Top 10 Most-Visited U.S. States | 0 | - | 4.90 | 96,233 |
| U.S. States with the Most Immigrants | 0 | - | 4.84 | 78,350 |
| Canada Provinces Map Quiz | 0 | - | 4.99 | 609,596 |
| The United States... or the United Kingdom? | 0 | - | 4.87 | 94,675 |
| Central America and Caribbean Map Quiz | 0 | - | 4.89 | 882,255 |
| U.S. History Multiple Choice #3 | 0 | - | 4.42 | 24,118 |
| North American Capitals - Map Quiz | 0 | - | 4.89 | 52,333 |
| All First-Level Subdivisions of North America on a Map | 0 | - | 4.97 | 55,205 |
| Old West History | 0 | - | 4.30 | 15,026 |
| Life of Benjamin Franklin | 0 | - | 4.22 | 6,384 |
| American Revolution - Multiple Choice | 0 | - | 4.34 | 19,463 |
| Canada Provinces and Territories | 0 | - | 4.99 | 311,193 |
| Territories of the United States | 0 | - | 4.78 | 50,685 |
| Five Biggest Immigrant Groups by Decade in the US | 0 | - | 4.75 | 37,397 |
| Most Mentioned Enemies of the USA | 0 | - | 4.77 | 168,671 |
| Major non-NATO U.S. Allies | 0 | - | 4.50 | 49,117 |
| States of Mexico | 0 | - | 4.93 | 157,473 |
| Mexico States Map Quiz | 0 | - | 4.81 | 97,717 |
| Central American Countries | 0 | - | 4.98 | 147,967 |
| Caribbean Countries and Territories | 0 | - | 4.81 | 109,011 |
| Caribbean / Lesser Antilles Map Quiz | 0 | - | 4.99 | 123,584 |
| Events in U.S. History | 0 | - | 4.39 | 27,388 |
| U.S. State Nicknames Quiz | 0 | - | 4.49 | 48,418 |
| Countries with American Expatriates | 0 | - | 4.55 | 41,811 |
| United States Landmarks Map Quiz | 0 | - | 4.55 | 39,378 |
| United States Country Quiz | 0 | - | 4.45 | 95,751 |
| Busiest Air Routes from the U.S. | 0 | - | 4.47 | 75,112 |
| U.S. Presidents Quiz | 0 | - | 5.00 | 3,438,840 |
| Deadliest U.S. Wars | 0 | - | 4.89 | 183,188 |
| The Life of Thomas Edison | 0 | - | 4.03 | 4,776 |
| U.S. History Multiple Choice #2 | 0 | - | 4.36 | 24,586 |
| U.S. History Multiple Choice #1 | 0 | - | 4.29 | 21,771 |
| Valid Answer - U.S. History | 0 | - | 4.22 | 22,013 |
| U.S. History Multiple Choice #4 | 0 | - | 4.26 | 24,934 |
| Countries Closest to Canada | 0 | - | 4.90 | 191,771 |
| Asian Countries Americans Travel to the Most | 0 | - | 4.74 | 57,906 |
| Top 10 Non-English Languages of Los Angeles | 0 | - | 4.42 | 57,947 |
| New England States | 0 | - | 4.51 | 58,956 |
| US States by Land Area | 0 | - | 4.63 | 50,735 |
| Top 10 U.S. States by Inland Water Area | 0 | - | 4.53 | 37,278 |
| Add a Letter - Make a U.S. State | 0 | - | 4.71 | 79,877 |
| Top 10 Widest U.S. States East to West | 0 | - | 4.71 | 53,688 |
| Top 10 Tallest U.S. States North to South | 0 | - | 4.77 | 39,208 |
| U.S. States by Borders | 0 | - | 4.61 | 33,870 |
| Save Americans by Guessing U.S. States | 0 | - | 4.53 | 168,840 |
| 10 Easternmost U.S. States | 0 | - | 4.55 | 54,825 |
| The Only U.S. State ... #1 | 0 | - | 4.52 | 85,295 |
| 50 States, 50 Cities - Hard Version | 0 | - | 4.46 | 42,462 |
| U.S. States with the Most Expensive Home Prices | 0 | - | 4.48 | 97,212 |
| Top 10 Most African-American U.S. States | 0 | - | 4.46 | 73,273 |
| Top 10 Most Asian U.S. States | 0 | - | 4.79 | 73,182 |
| Top 10 Most Obese U.S. States | 0 | - | 4.54 | 80,219 |
| Top 10 Least Obese U.S. States | 0 | - | 4.77 | 71,881 |
| Top 10 Most-Educated U.S. States | 0 | - | 4.47 | 81,110 |
| U.S. States with the Highest Rates of Homelessness | 0 | - | 4.44 | 50,745 |
| Top 10 Most White U.S. States | 0 | - | 4.50 | 78,050 |
| Top 10 Most German U.S. States | 0 | - | 4.49 | 57,262 |
| Slowest Growing U.S. States Since 1960 | 0 | - | 4.43 | 39,080 |
| Countries that Beat Canada | 0 | - | 4.90 | 83,480 |
| U.S. Federal Holidays | 0 | - | 4.30 | 97,803 |
| Red State or Blue State Trait? | 0 | - | 4.45 | 52,360 |
| History of Pennsylvania | 0 | - | 4.11 | 6,851 |
| History of Virginia | 0 | - | 4.34 | 11,318 |
| U.S. States with the Highest Percentage of Farmland | 0 | - | 4.74 | 55,347 |
| U.S. States with the Lowest Percentage of Farmland | 0 | - | 4.74 | 54,148 |
| Top 10 U.S. States with the Lowest Life Expectancy | 0 | - | 4.64 | 43,951 |
| Top 10 U.S. States with the Highest Elevation | 0 | - | 4.51 | 67,071 |
| Top 10 U.S. States That Grow the Most Corn | 0 | - | 4.52 | 35,159 |
| Top 10 U.S. States People are Moving To | 0 | - | 4.61 | 48,182 |
| U.S. States with the Lowest Average Elevation | 0 | - | 4.55 | 37,693 |
| U.S. States With the Highest Average Elevation | 0 | - | 4.61 | 32,095 |
| Flags of North and South America Quiz | 0 | - | 4.99 | 334,317 |
| Latin American Countries Map Quiz | 0 | - | 4.97 | 119,169 |
| South America Map Quiz | 0 | - | 5.00 | 1,490,376 |
| Belize Country Quiz | 0 | - | 4.87 | 19,929 |
| Saint Vincent and the Grenadines Country Quiz | 0 | - | 4.88 | 18,199 |
| Top U.S. Universities | 0 | - | 4.14 | 136,944 |
| Largest United States Airlines | 0 | - | 4.38 | 53,508 |
| Third Most Common Language by U.S. State | 0 | - | 4.90 | 111,093 |
| U.S. States by Governor Quiz | 0 | - | 4.42 | 17,511 |
| U.S. Political Parties in History | 0 | - | 4.44 | 26,975 |
| U.S. Government Agencies | 0 | - | 4.44 | 18,750 |
| U.S. Presidents by Picture | 0 | - | 4.85 | 411,082 |
| Florida Pro Sport Teams | 0 | - | 4.68 | 11,118 |
| Countries of Europe in 1650 with a Map | 0 | - | 4.94 | 59,853 |
| Georgia ... or Georgia? | 0 | - | 4.69 | 74,554 |
| Dominica Country Quiz | 0 | - | 4.82 | 18,888 |
| American Legal Vocabulary | 0 | - | 4.40 | 33,059 |
| U.S. Cities by Picture #1 | 0 | - | 4.37 | 33,285 |
| Cities by Picture #2 | 0 | - | 4.22 | 33,904 |
| Countries Closest to the U. S. | 0 | - | 4.40 | 202,775 |
| American Geography Quiz for Dummies | 0 | - | 4.36 | 55,548 |
| The U.S. Government - How Does it Work? | 0 | - | 4.34 | 41,265 |
| First Names of U.S. Presidents | 0 | - | 4.84 | 369,193 |
| People on Money - United States | 0 | - | 4.32 | 62,605 |
| U.S. History Groups of Two | 0 | - | 4.22 | 43,234 |
| Last 10 U.S. States Alphabetically | 0 | - | 4.35 | 73,074 |
| Top 10 Least Populous U.S. State Capitals | 0 | - | 4.50 | 21,098 |
| Flyover States | 0 | - | 4.52 | 28,799 |
| U.S. States With Double Letters | 0 | - | 4.65 | 22,651 |
| U.S. States Bigger than Their Neighbors | 0 | - | 4.26 | 74,009 |
| 50 States, 50 Cities - Easy Version | 0 | - | 4.39 | 124,471 |
| U.S. States with the Most Gun Ownership | 0 | - | 4.46 | 28,802 |
| U.S. States with the Cheapest Home Prices | 0 | - | 4.65 | 31,546 |
| U.S. States with Oldest Median Age | 0 | - | 4.32 | 40,951 |
| Top 10 U.S. States with the Longest Commutes | 0 | - | 4.30 | 42,969 |
| Top 10 Least-Educated U.S. States | 0 | - | 4.40 | 71,271 |
| US States with the Most Executions | 0 | - | 4.51 | 26,075 |
| Top 10 U.S. States with the Most Lighthouses | 0 | - | 4.61 | 28,105 |
| Top 10 Least-Forested U.S. States | 0 | - | 4.49 | 44,980 |
| Top 10 Least White U.S. States | 0 | - | 4.19 | 45,167 |
| Top 10 Least Happy U.S. States | 0 | - | 4.54 | 23,224 |
| Canada Immigration by Country | 0 | - | 4.51 | 60,020 |
| The Only American Country ... | 0 | - | 4.93 | 115,639 |
| American Countries with the Shortest Names | 0 | - | 4.96 | 106,232 |
| North America Capitals Quiz | 0 | - | 4.99 | 202,288 |
| USA Tourist Attractions by Description #1 | 0 | - | 4.09 | 26,563 |
| Which Island in the United States? | 0 | - | 4.19 | 19,009 |
| American Inventions #1 | 0 | - | 3.65 | 31,246 |
| American Inventions #2 | 0 | - | 3.91 | 15,628 |
| American Foods | 0 | - | 3.69 | 38,735 |
| Biggest U.S. Car Insurance Companies | 0 | - | 4.26 | 5,921 |
| U.S. Landmarks Picture Quiz | 0 | - | 4.25 | 14,210 |
| U.S. Groups of Four Quiz | 0 | - | 4.38 | 24,434 |
| U.S. Groups of Three Quiz | 0 | - | 4.06 | 20,305 |
| Recommended Childhood Vaccines for Americans | 0 | - | 4.37 | 14,224 |
| Name a Valid U.S. President #1 | 0 | - | 4.90 | 180,067 |
| Play-Doh Presidents | 0 | - | 5.00 | 78,890 |
| New York City Geography | 0 | - | 4.38 | 23,876 |
| US States Quiz | 0 | - | 5.00 | 15,829,458 |
| U.S. States with the Lowest HDI | 0 | - | 4.46 | 28,230 |
| Which U.S. State - Multiple Choice | 0 | - | 4.48 | 19,738 |
| Top 10 U.S. States with the Highest Life Expectancy | 0 | - | 4.33 | 41,025 |
| Top 10 U.S. States People are Leaving | 0 | - | 4.40 | 51,883 |
| Canada Country Quiz | 0 | - | 4.53 | 127,209 |
| Canada Cities Map Quiz | 0 | - | 4.53 | 113,035 |
| Canada A-Z | 0 | - | 4.70 | 31,715 |
| Countries of Europe in 1815 With a Map | 0 | - | 4.99 | 142,381 |
| Countries of Europe in 1848 | 0 | - | 4.98 | 70,005 |
| Countries of Europe in 1870 with a Map | 0 | - | 4.94 | 57,256 |
| Every Country of Europe Since 1815 With a Map | 0 | - | 4.98 | 65,358 |
| Countries of Europe in 1360 with a Map | 0 | - | 4.99 | 51,919 |
| Countries of the Mongol Empire on a Map | 0 | - | 4.99 | 100,481 |
| Top 10 Biggest Economies in the Americas | 0 | - | 4.93 | 87,024 |
| American Countries With No Atlantic Coastline | 0 | - | 4.94 | 89,310 |
| History of Mexico | 0 | - | 4.58 | 14,731 |
| Countries of South America with an Empty Map | 0 | - | 4.94 | 100,073 |
| All First-Level Subdivisions of South America on a Map | 0 | - | 4.90 | 46,781 |
| Brazil States Map Quiz | 0 | - | 4.84 | 44,047 |
| States of Brazil | 0 | - | 4.97 | 78,067 |
| Fictional Characters from the Midwest by Picture | 0 | - | 4.06 | 18,893 |
| U.S. States by Picture #1 | 0 | - | 4.17 | 14,909 |
| Most-Visited U.S. Cities | 0 | - | 4.88 | 83,361 |
| Every U.S. Metro Area on a Map | 0 | - | 4.97 | 70,216 |
| Senators Who Ran For President | 0 | - | 4.28 | 16,698 |
| U.S. Electoral College Landslides | 0 | - | 4.33 | 21,564 |
| California Multiple Choice | 0 | - | 4.40 | 27,577 |
| Geography of California | 0 | - | 4.23 | 10,141 |
| California Pro Sport Teams | 0 | - | 4.23 | 22,428 |
| San Francisco Trivia | 0 | - | 4.40 | 15,451 |
| San Francisco A-Z | 0 | - | 4.22 | 9,306 |
| Florida Multiple Choice | 0 | - | 4.33 | 9,972 |
| Chicago City Trivia | 0 | - | 4.29 | 30,949 |
