| United States Map Quiz | 0 | - | 4.98 | 4,148,710 |
| U.S. History Multiple Choice #3 | 0 | - | 4.43 | 24,689 |
| U.S. State Border Crossings | 0 | - | 4.97 | 96,213 |
| U.S. Citizenship Test Questions | 0 | - | 4.83 | 238,847 |
| U.S. Cities with the Most International Tourists | 0 | - | 4.88 | 75,174 |
| Cities and Towns of Massachusetts | 0 | - | 4.92 | 73,475 |
| Countries Larger Than Texas but With Fewer People | 0 | - | 4.92 | 39,697 |
| The United States... or the United Kingdom? | 0 | - | 4.87 | 98,143 |
| States of the U.S. in Alphabetical Order | 0 | - | 4.98 | 366,147 |
| Name the U.S. National Parks | 0 | - | 4.86 | 59,582 |
| Total United States Immigration by Country | 0 | - | 4.91 | 111,068 |
| Most Common U.S. Last Names - Extreme | 0 | - | 4.94 | 173,772 |
| "Do Not Travel" Countries for U.S. Citizens | 0 | - | 4.97 | 242,324 |
| U.S. Cabinet Departments | 0 | - | 4.86 | 72,685 |
| Top 10 Non-English Languages Spoken in New York City | 0 | - | 4.85 | 65,914 |
| Pixelated United States Map | 0 | - | 4.89 | 93,831 |
| Most-Visited Countries by Americans | 0 | - | 4.87 | 109,029 |
| Countries that Visit the United States the Most | 0 | - | 4.96 | 91,265 |
| U.S. History Multiple Choice #1 | 0 | - | 4.31 | 22,203 |
| U.S. History Multiple Choice #4 | 0 | - | 4.26 | 25,535 |
| The 13 Colonies Quiz | 0 | - | 4.97 | 117,371 |
| U.S. States with the Letter Y | 0 | - | 4.85 | 110,942 |
| 10 Southernmost U.S. States | 0 | - | 4.88 | 112,937 |
| U.S. States with Short Names | 0 | - | 4.91 | 148,379 |
| U.S. States that Start with M | 0 | - | 4.93 | 186,613 |
| U.S. States By Population | 0 | - | 4.92 | 152,795 |
| U.S. States that Start with N | 0 | - | 4.95 | 170,910 |
| U.S. States with Longest Names | 0 | - | 4.84 | 44,172 |
| 10 Northernmost U.S. States | 0 | - | 4.90 | 82,210 |
| U.S. States with a Unique First Letter | 0 | - | 4.96 | 87,962 |
| 10 Westernmost U.S. States | 0 | - | 4.95 | 63,987 |
| The Only Remaining U.S. State . . . | 0 | - | 4.92 | 65,274 |
| Top 10 Largest U.S. States by Area | 0 | - | 4.95 | 159,552 |
| Top 10 Smallest U.S. States by Area | 0 | - | 4.98 | 177,384 |
| Top 10 Poorest U.S. States by Median Income | 0 | - | 4.86 | 124,874 |
| U.S. States with the Highest Percentage of Hispanics | 0 | - | 4.85 | 69,337 |
| Top 10 Newest U.S. States | 0 | - | 4.85 | 85,990 |
| Top 10 U.S. States Where the Rent is Too Dang High | 0 | - | 4.85 | 67,206 |
| U.S. History Multiple Choice #5 | 0 | - | 4.26 | 11,525 |
| Countries of North America Quiz | 0 | - | 5.00 | 1,017,402 |
| Countries that Beat the United States | 0 | - | 4.93 | 166,160 |
| Embarrassing Chapters in US History | 0 | - | 4.17 | 33,050 |
| Top 10 Most-Visited U.S. States | 0 | - | 4.90 | 101,424 |
| U.S. States with the Most Immigrants | 0 | - | 4.85 | 82,208 |
| Canada Provinces and Territories | 0 | - | 5.00 | 339,909 |
| Canada Provinces Map Quiz | 0 | - | 4.99 | 637,900 |
| Central America and Caribbean Map Quiz | 0 | - | 4.89 | 900,774 |
| Three Real and One Fake - U.S. History | 0 | - | 4.33 | 25,730 |
| North American Capitals - Map Quiz | 0 | - | 4.87 | 57,422 |
| All First-Level Subdivisions of North America on a Map | 0 | - | 4.97 | 63,518 |
| Red State or Blue State Trait? | 0 | - | 4.42 | 55,130 |
| Old West History | 0 | - | 4.33 | 15,241 |
| Life of Benjamin Franklin | 0 | - | 4.24 | 6,508 |
| American Revolution - Multiple Choice | 0 | - | 4.34 | 19,892 |
| States of Mexico | 0 | - | 4.95 | 174,741 |
| Mexico States Map Quiz | 0 | - | 4.84 | 104,202 |
| Central American Countries | 0 | - | 4.98 | 155,532 |
| Caribbean / Lesser Antilles Map Quiz | 0 | - | 4.99 | 146,901 |
| Territories of the United States | 0 | - | 4.79 | 52,262 |
| Five Biggest Immigrant Groups by Decade in the US | 0 | - | 4.79 | 39,495 |
| Most Mentioned Enemies of the USA | 0 | - | 4.77 | 174,988 |
| Major non-NATO U.S. Allies | 0 | - | 4.52 | 51,950 |
| New York City Geography | 0 | - | 4.42 | 33,024 |
| Events in U.S. History | 0 | - | 4.40 | 28,573 |
| U.S. State Nicknames | 0 | - | 4.47 | 50,392 |
| Countries with American Expatriates | 0 | - | 4.53 | 42,518 |
| United States Landmarks Map Quiz | 0 | - | 4.55 | 40,130 |
| United States Country Quiz | 0 | - | 4.43 | 101,061 |
| Busiest Air Routes from the U.S. | 0 | - | 4.46 | 76,734 |
| The U.S. Government - How Does it Work? | 0 | - | 4.34 | 42,265 |
| U.S. Presidents Quiz | 0 | - | 5.00 | 3,674,641 |
| Deadliest U.S. Wars | 0 | - | 4.89 | 189,803 |
| Valid Answer - U.S. History | 0 | - | 4.24 | 22,492 |
| Most-Visited Countries by Canadians | 0 | - | 4.82 | 39,185 |
| Countries Closest to Canada | 0 | - | 4.90 | 197,742 |
| Asian Countries Americans Travel to the Most | 0 | - | 4.75 | 59,796 |
| Countries Closest to the U. S. | 0 | - | 4.41 | 208,472 |
| American Geography Quiz for Dummies | 0 | - | 4.41 | 68,928 |
| Top 10 Non-English Languages of Los Angeles | 0 | - | 4.42 | 59,737 |
| New England States | 0 | - | 4.51 | 59,756 |
| U.S. States by Land Area | 0 | - | 4.61 | 52,638 |
| Top 10 U.S. States by Inland Water Area | 0 | - | 4.53 | 37,952 |
| Add a Letter - Make a U.S. State | 0 | - | 4.72 | 82,568 |
| Top 10 Widest U.S. States East to West | 0 | - | 4.70 | 55,830 |
| Top 10 Tallest U.S. States North to South | 0 | - | 4.74 | 40,792 |
| U.S. States by Borders | 0 | - | 4.63 | 35,198 |
| Save Americans by Guessing U.S. States | 0 | - | 4.61 | 183,941 |
| Which U.S. State - Multiple Choice | 0 | - | 4.48 | 20,243 |
| 10 Easternmost U.S. States | 0 | - | 4.53 | 56,369 |
| The Only U.S. State ... #1 | 0 | - | 4.52 | 101,823 |
| 50 States, 50 Cities - Hard Version | 0 | - | 4.46 | 44,087 |
| U.S. States with the Most Expensive Home Prices | 0 | - | 4.48 | 99,465 |
| U.S. States with the Cheapest Home Prices | 0 | - | 4.72 | 32,903 |
| Top 10 Most African-American U.S. States | 0 | - | 4.46 | 74,515 |
| Top 10 Most Asian U.S. States | 0 | - | 4.80 | 75,023 |
| Top 10 Most Obese U.S. States | 0 | - | 4.54 | 81,287 |
| Top 10 Least Obese U.S. States | 0 | - | 4.75 | 73,556 |
| Top 10 Least-Educated U.S. States | 0 | - | 4.43 | 90,588 |
| Top 10 Most-Educated U.S. States | 0 | - | 4.48 | 84,579 |
| U.S. States with the Highest Rates of Homelessness | 0 | - | 4.43 | 52,273 |
| Top 10 Most White U.S. States | 0 | - | 4.49 | 82,192 |
| Top 10 Most German U.S. States | 0 | - | 4.48 | 59,795 |
| Slowest Growing U.S. States Since 1960 | 0 | - | 4.43 | 46,351 |
| Ten Most Rectangular U.S. States | 0 | - | 4.54 | 71,137 |
| Countries that Beat Canada | 0 | - | 4.90 | 87,126 |
| U.S. Federal Holidays | 0 | - | 4.33 | 99,367 |
| Recommended Childhood Vaccines for Americans | 0 | - | 4.42 | 14,680 |
| 75 Americans Named John | 0 | - | 4.41 | 23,862 |
| California Multiple Choice | 0 | - | 4.40 | 28,069 |
| Florida Multiple Choice | 0 | - | 4.33 | 10,172 |
| History of Pennsylvania | 0 | - | 4.16 | 7,110 |
| History of Virginia | 0 | - | 4.31 | 11,576 |
| Georgia ... or Georgia? | 0 | - | 4.67 | 76,588 |
| Flags of North and South America | 0 | - | 4.99 | 370,243 |
| South America Map Quiz | 0 | - | 5.00 | 1,544,674 |
| Belize Country Quiz | 0 | - | 4.85 | 20,881 |
| Saint Vincent and the Grenadines Country Quiz | 0 | - | 4.88 | 19,124 |
| Top U.S. Universities | 0 | - | 4.15 | 144,530 |
| Largest United States Airlines | 0 | - | 4.39 | 54,928 |
| U.S. States by Governor | 0 | - | 4.43 | 18,016 |
| U.S. Political Parties in History | 0 | - | 4.44 | 27,624 |
| U.S. Government Agencies | 0 | - | 4.44 | 19,606 |
| U.S. Presidents by Picture | 0 | - | 4.87 | 425,034 |
| Florida Pro Sport Teams | 0 | - | 4.61 | 11,791 |
| Boston Talk to English Translation Quiz | 0 | - | 4.59 | 55,833 |
| North Carolina... or South Carolina? | 0 | - | 4.21 | 10,502 |
| U.S. States with the Highest Percentage of Farmland | 0 | - | 4.80 | 65,369 |
| U.S. States with the Lowest Percentage of Farmland | 0 | - | 4.74 | 55,112 |
| Top 10 U.S. States with the Lowest Life Expectancy | 0 | - | 4.67 | 45,039 |
| Top 10 U.S. States with the Highest Elevation | 0 | - | 4.51 | 67,821 |
| Top 10 U.S. States That Grow the Most Corn | 0 | - | 4.52 | 36,084 |
| Top 10 U.S. States People are Leaving | 0 | - | 4.42 | 59,224 |
| Top 10 U.S. States People are Moving To | 0 | - | 4.73 | 63,706 |
| U.S. States with the Lowest Average Elevation | 0 | - | 4.55 | 38,439 |
| U.S. States With the Highest Average Elevation | 0 | - | 4.61 | 32,707 |
| Canada True or False? | 0 | - | 4.57 | 54,745 |
| Latin American Countries Map Quiz | 0 | - | 4.97 | 128,859 |
| Dominica Country Quiz | 0 | - | 4.81 | 19,747 |
| Third Most Common Language by U.S. State | 0 | - | 4.87 | 113,547 |
| American Legal Vocabulary | 0 | - | 4.40 | 33,843 |
| U.S. Cities by Picture #1 | 0 | - | 4.36 | 34,440 |
| Cities by Picture #2 | 0 | - | 4.19 | 35,016 |
| First Names of U.S. Presidents | 0 | - | 4.85 | 380,408 |
| Washington... or Washington D.C.? | 0 | - | 4.33 | 26,486 |
| People on Money - United States | 0 | - | 4.31 | 63,266 |
| U.S. History Groups of Two | 0 | - | 4.23 | 44,340 |
| The Life of Thomas Edison | 0 | - | 3.95 | 4,907 |
| Last 10 U.S. States Alphabetically | 0 | - | 4.35 | 74,721 |
| Top 10 Least Populous U.S. State Capitals | 0 | - | 4.52 | 21,495 |
| Flyover States | 0 | - | 4.52 | 29,450 |
| U.S. States With Double Letters | 0 | - | 4.54 | 24,016 |
| U.S. States Bigger than Their Neighbors | 0 | - | 4.27 | 75,975 |
| 50 States, 50 Cities - Easy Version | 0 | - | 4.39 | 128,163 |
| U.S. States with the Most Gun Ownership | 0 | - | 4.44 | 29,636 |
| U.S. States with Oldest Median Age | 0 | - | 4.33 | 42,461 |
| Top 10 U.S. States with the Longest Commutes | 0 | - | 4.28 | 44,269 |
| US States with the Most Executions | 0 | - | 4.51 | 26,368 |
| Top 10 U.S. States with the Most Lighthouses | 0 | - | 4.61 | 28,987 |
| Top 10 Least-Forested U.S. States | 0 | - | 4.50 | 46,415 |
| Top 10 Least White U.S. States | 0 | - | 4.17 | 47,800 |
| Top 10 Least Happy U.S. States | 0 | - | 4.54 | 24,073 |
| Canada Immigration by Country | 0 | - | 4.51 | 62,390 |
| Countries of Europe in 1650 with a Map | 0 | - | 4.95 | 68,368 |
| The Only American Country ... | 0 | - | 4.92 | 121,178 |
| American Countries with the Shortest Names | 0 | - | 4.96 | 120,735 |
| Caribbean Countries and Territories | 0 | - | 4.80 | 112,547 |
| North America Capitals Quiz | 0 | - | 4.99 | 218,276 |
| USA Tourist Attractions by Description #1 | 0 | - | 4.14 | 27,079 |
| Which Island in the United States? | 0 | - | 4.29 | 29,335 |
| American Inventions #1 | 0 | - | 3.63 | 31,483 |
| American Inventions #2 | 0 | - | 3.93 | 15,846 |
| American Foods | 0 | - | 3.66 | 39,325 |
| Biggest U.S. Car Insurance Companies | 0 | - | 4.26 | 6,120 |
| Countries Across the Ocean from the U.S. | 0 | - | 3.94 | 32,169 |
| U.S. Landmarks Picture Quiz | 0 | - | 4.26 | 14,698 |
| U.S. Groups of Four Quiz | 0 | - | 4.39 | 25,254 |
| U.S. Groups of Three Quiz | 0 | - | 4.04 | 20,844 |
| U.S. Analogies | 0 | - | 4.27 | 19,638 |
| Branches of the U.S. Military | 0 | - | 4.40 | 24,254 |
| Name a Valid U.S. President #1 | 0 | - | 4.89 | 190,708 |
| Play-Doh Presidents | 0 | - | 5.00 | 81,950 |
| US States Quiz | 0 | - | 5.00 | 16,781,946 |
| 10 U.S. States with the Most Valuable Crops | 0 | - | 4.41 | 29,523 |
| U.S. States with the Lowest HDI | 0 | - | 4.47 | 28,813 |
| Top 10 U.S. States with the Highest Life Expectancy | 0 | - | 4.33 | 41,614 |
| Canada Country Quiz | 0 | - | 4.54 | 132,101 |
| Canada Cities Map Quiz | 0 | - | 4.63 | 123,885 |
| Canada A-Z | 0 | - | 4.73 | 32,723 |
| Countries of Europe in 1815 With a Map | 0 | - | 4.99 | 149,553 |
| Countries of Europe in 1848 | 0 | - | 4.99 | 75,873 |
| Countries of Europe in 1870 with a Map | 0 | - | 4.95 | 63,978 |
| Every Country of Europe Since 1815 With a Map | 0 | - | 4.98 | 70,499 |
| Countries of Europe in 1360 with a Map | 0 | - | 4.99 | 56,385 |
| Countries of the Mongol Empire on a Map | 0 | - | 4.99 | 106,327 |
| Biggest Mongol Empire Countries | 0 | - | 4.89 | 80,982 |
| Top 10 American Countries by Coastline | 0 | - | 4.96 | 88,201 |
| Top 10 Richest Countries in the Americas | 0 | - | 4.93 | 82,023 |
| Top 10 Biggest Economies in the Americas | 0 | - | 4.93 | 91,476 |
| American Countries With No Atlantic Coastline | 0 | - | 4.94 | 92,144 |
| History of Mexico | 0 | - | 4.58 | 15,261 |
