| United States Map Quiz | 0 | - | 4.98 | 4,164,883 |
| U.S. State Border Crossings | 0 | - | 4.97 | 96,656 |
| U.S. Citizenship Test Questions | 0 | - | 4.83 | 239,929 |
| U.S. Cities with the Most International Tourists | 0 | - | 4.88 | 75,675 |
| Cities and Towns of Massachusetts | 0 | - | 4.92 | 74,508 |
| Countries Larger Than Texas but With Fewer People | 0 | - | 4.92 | 40,079 |
| The United States... or the United Kingdom? | 0 | - | 4.87 | 98,809 |
| States of the U.S. in Alphabetical Order | 0 | - | 4.98 | 367,938 |
| Name the U.S. National Parks | 0 | - | 4.86 | 60,183 |
| Total United States Immigration by Country | 0 | - | 4.91 | 111,970 |
| Most Common U.S. Last Names - Extreme | 0 | - | 4.94 | 175,011 |
| "Do Not Travel" Countries for U.S. Citizens | 0 | - | 4.97 | 245,161 |
| U.S. Cabinet Departments | 0 | - | 4.86 | 72,972 |
| Top 10 Non-English Languages Spoken in New York City | 0 | - | 4.85 | 66,471 |
| U.S. History Multiple Choice #3 | 0 | - | 4.43 | 24,752 |
| Pixelated United States Map | 0 | - | 4.88 | 94,524 |
| Most-Visited Countries by Americans | 0 | - | 4.86 | 110,055 |
| Countries that Visit the United States the Most | 0 | - | 4.96 | 92,080 |
| The 13 Colonies Quiz | 0 | - | 4.97 | 118,195 |
| U.S. States with the Letter Y | 0 | - | 4.85 | 111,806 |
| 10 Southernmost U.S. States | 0 | - | 4.89 | 113,750 |
| U.S. States with Short Names | 0 | - | 4.91 | 149,434 |
| U.S. States that Start with M | 0 | - | 4.93 | 187,761 |
| U.S. States By Population | 0 | - | 4.92 | 153,814 |
| U.S. States that Start with N | 0 | - | 4.95 | 171,811 |
| U.S. States with Longest Names | 0 | - | 4.84 | 44,639 |
| 10 Northernmost U.S. States | 0 | - | 4.90 | 82,764 |
| U.S. States with a Unique First Letter | 0 | - | 4.96 | 88,583 |
| 10 Westernmost U.S. States | 0 | - | 4.95 | 64,359 |
| The Only Remaining U.S. State . . . | 0 | - | 4.93 | 65,845 |
| Top 10 Largest U.S. States by Area | 0 | - | 4.95 | 160,342 |
| Top 10 Smallest U.S. States by Area | 0 | - | 4.98 | 177,987 |
| Top 10 Poorest U.S. States by Median Income | 0 | - | 4.86 | 125,453 |
| U.S. States with the Highest Percentage of Hispanics | 0 | - | 4.85 | 69,699 |
| Top 10 Newest U.S. States | 0 | - | 4.85 | 86,481 |
| Top 10 U.S. States Where the Rent is Too Dang High | 0 | - | 4.85 | 67,779 |
| Countries of North America Quiz | 0 | - | 5.00 | 1,026,908 |
| Countries that Beat the United States | 0 | - | 4.93 | 167,956 |
| Events in U.S. History | 0 | - | 4.41 | 28,734 |
| Embarrassing Chapters in US History | 0 | - | 4.17 | 33,146 |
| Top 10 Most-Visited U.S. States | 0 | - | 4.90 | 102,011 |
| U.S. States with the Most Immigrants | 0 | - | 4.85 | 82,655 |
| Canada Provinces and Territories | 0 | - | 5.00 | 344,214 |
| Canada Provinces Map Quiz | 0 | - | 4.99 | 642,216 |
| Florida True or False? | 0 | - | 4.48 | 28,727 |
| Central America and Caribbean Map Quiz | 0 | - | 4.89 | 903,183 |
| Three Real and One Fake - U.S. History | 0 | - | 4.33 | 25,801 |
| U.S. History Multiple Choice #2 | 0 | - | 4.32 | 25,095 |
| U.S. History Multiple Choice #1 | 0 | - | 4.31 | 22,266 |
| U.S. History Multiple Choice #4 | 0 | - | 4.24 | 25,630 |
| U.S. History Multiple Choice #5 | 0 | - | 4.26 | 11,576 |
| North American Capitals - Map Quiz | 0 | - | 4.88 | 58,314 |
| All First-Level Subdivisions of North America on a Map | 0 | - | 4.97 | 64,491 |
| Red State or Blue State Trait? | 0 | - | 4.42 | 55,507 |
| Old West History | 0 | - | 4.34 | 15,288 |
| Life of Benjamin Franklin | 0 | - | 4.24 | 6,529 |
| American Revolution - Multiple Choice | 0 | - | 4.34 | 19,962 |
| Canada True or False? | 0 | - | 4.57 | 55,006 |
| States of Mexico | 0 | - | 4.96 | 177,114 |
| Mexico States Map Quiz | 0 | - | 4.84 | 105,284 |
| Central American Countries | 0 | - | 4.98 | 156,900 |
| Caribbean Countries and Territories | 0 | - | 4.81 | 113,030 |
| Caribbean / Lesser Antilles Map Quiz | 0 | - | 4.99 | 149,294 |
| Territories of the United States | 0 | - | 4.80 | 52,495 |
| Five Biggest Immigrant Groups by Decade in the US | 0 | - | 4.79 | 39,764 |
| Most Mentioned Enemies of the USA | 0 | - | 4.77 | 175,781 |
| Major non-NATO U.S. Allies | 0 | - | 4.52 | 52,327 |
| New York City Geography | 0 | - | 4.42 | 33,139 |
| U.S. State Nicknames | 0 | - | 4.47 | 50,625 |
| Countries with American Expatriates | 0 | - | 4.53 | 42,625 |
| United States Landmarks Map Quiz | 0 | - | 4.55 | 40,225 |
| United States Country Quiz | 0 | - | 4.43 | 101,823 |
| Busiest Air Routes from the U.S. | 0 | - | 4.46 | 76,982 |
| The U.S. Government - How Does it Work? | 0 | - | 4.34 | 42,408 |
| U.S. Presidents Quiz | 0 | - | 5.00 | 3,711,928 |
| Deadliest U.S. Wars | 0 | - | 4.89 | 191,359 |
| Valid Answer - U.S. History | 0 | - | 4.24 | 22,563 |
| Most-Visited Countries by Canadians | 0 | - | 4.83 | 39,484 |
| Countries Closest to Canada | 0 | - | 4.91 | 198,696 |
| Asian Countries Americans Travel to the Most | 0 | - | 4.75 | 60,092 |
| Countries Closest to the U. S. | 0 | - | 4.41 | 209,970 |
| American Geography Quiz for Dummies | 0 | - | 4.41 | 69,276 |
| Top 10 Non-English Languages of Los Angeles | 0 | - | 4.43 | 59,985 |
| New England States | 0 | - | 4.51 | 59,851 |
| U.S. States by Land Area | 0 | - | 4.63 | 52,926 |
| Top 10 U.S. States by Inland Water Area | 0 | - | 4.53 | 38,054 |
| Add a Letter - Make a U.S. State | 0 | - | 4.70 | 82,955 |
| Top 10 Widest U.S. States East to West | 0 | - | 4.70 | 56,150 |
| Top 10 Tallest U.S. States North to South | 0 | - | 4.74 | 41,027 |
| U.S. States by Borders | 0 | - | 4.62 | 35,397 |
| Save Americans by Guessing U.S. States | 0 | - | 4.61 | 186,877 |
| Which U.S. State - Multiple Choice | 0 | - | 4.48 | 20,330 |
| 10 Easternmost U.S. States | 0 | - | 4.53 | 56,571 |
| The Only U.S. State ... #1 | 0 | - | 4.52 | 102,182 |
| 50 States, 50 Cities - Hard Version | 0 | - | 4.46 | 44,287 |
| U.S. States with the Most Expensive Home Prices | 0 | - | 4.48 | 99,771 |
| U.S. States with the Cheapest Home Prices | 0 | - | 4.74 | 33,119 |
| Top 10 Most African-American U.S. States | 0 | - | 4.46 | 74,765 |
| Top 10 Most Asian U.S. States | 0 | - | 4.80 | 75,320 |
| Top 10 Most Obese U.S. States | 0 | - | 4.54 | 81,441 |
| Top 10 Least Obese U.S. States | 0 | - | 4.75 | 73,770 |
| Top 10 Least-Educated U.S. States | 0 | - | 4.43 | 91,123 |
| Top 10 Most-Educated U.S. States | 0 | - | 4.48 | 85,065 |
| U.S. States with the Highest Rates of Homelessness | 0 | - | 4.43 | 52,493 |
| Top 10 Most White U.S. States | 0 | - | 4.49 | 82,798 |
| Top 10 Most German U.S. States | 0 | - | 4.48 | 60,113 |
| Slowest Growing U.S. States Since 1960 | 0 | - | 4.43 | 46,988 |
| Ten Most Rectangular U.S. States | 0 | - | 4.54 | 71,568 |
| Countries that Beat Canada | 0 | - | 4.91 | 98,629 |
| U.S. Federal Holidays | 0 | - | 4.33 | 99,540 |
| Recommended Childhood Vaccines for Americans | 0 | - | 4.42 | 14,741 |
| 75 Americans Named John | 0 | - | 4.41 | 23,937 |
| California Multiple Choice | 0 | - | 4.40 | 28,132 |
| Florida Multiple Choice | 0 | - | 4.33 | 10,190 |
| History of Pennsylvania | 0 | - | 4.16 | 7,149 |
| History of Virginia | 0 | - | 4.31 | 11,615 |
| Flags of North and South America | 0 | - | 4.99 | 374,849 |
| South America Map Quiz | 0 | - | 5.00 | 1,552,478 |
| Belize Country Quiz | 0 | - | 4.85 | 21,025 |
| Saint Vincent and the Grenadines Country Quiz | 0 | - | 4.88 | 19,258 |
| Top U.S. Universities | 0 | - | 4.15 | 145,452 |
| Largest United States Airlines | 0 | - | 4.39 | 55,091 |
| U.S. States by Governor | 0 | - | 4.43 | 18,084 |
| U.S. Political Parties in History | 0 | - | 4.44 | 27,723 |
| U.S. Government Agencies | 0 | - | 4.44 | 19,720 |
| U.S. Presidents by Picture | 0 | - | 4.87 | 427,322 |
| Florida Pro Sport Teams | 0 | - | 4.61 | 11,872 |
| Boston Talk to English Translation Quiz | 0 | - | 4.59 | 56,057 |
| North Carolina... or South Carolina? | 0 | - | 4.21 | 10,545 |
| U.S. States with the Highest Percentage of Farmland | 0 | - | 4.80 | 65,551 |
| U.S. States with the Lowest Percentage of Farmland | 0 | - | 4.74 | 55,258 |
| Top 10 U.S. States with the Lowest Life Expectancy | 0 | - | 4.61 | 45,193 |
| Top 10 U.S. States with the Highest Elevation | 0 | - | 4.51 | 67,921 |
| Top 10 U.S. States That Grow the Most Corn | 0 | - | 4.52 | 36,215 |
| Top 10 U.S. States People are Leaving | 0 | - | 4.42 | 59,589 |
| Top 10 U.S. States People are Moving To | 0 | - | 4.74 | 63,940 |
| U.S. States with the Lowest Average Elevation | 0 | - | 4.55 | 38,537 |
| U.S. States With the Highest Average Elevation | 0 | - | 4.61 | 32,803 |
| Ancient Rome - True or False? | 0 | - | 4.85 | 43,113 |
| Georgia ... or Georgia? | 0 | - | 4.67 | 76,901 |
| Latin American Countries Map Quiz | 0 | - | 4.97 | 130,222 |
| Dominica Country Quiz | 0 | - | 4.81 | 19,878 |
| Third Most Common Language by U.S. State | 0 | - | 4.87 | 113,837 |
| American Legal Vocabulary | 0 | - | 4.40 | 33,967 |
| U.S. Cities by Picture #1 | 0 | - | 4.36 | 34,639 |
| Cities by Picture #2 | 0 | - | 4.19 | 35,203 |
| First Names of U.S. Presidents | 0 | - | 4.86 | 382,536 |
| Washington... or Washington D.C.? | 0 | - | 4.33 | 26,552 |
| People on Money - United States | 0 | - | 4.31 | 63,385 |
| U.S. History Groups of Two | 0 | - | 4.23 | 44,527 |
| The Life of Thomas Edison | 0 | - | 3.95 | 4,918 |
| Last 10 U.S. States Alphabetically | 0 | - | 4.35 | 74,936 |
| Top 10 Least Populous U.S. State Capitals | 0 | - | 4.52 | 21,547 |
| Flyover States | 0 | - | 4.52 | 29,549 |
| U.S. States With Double Letters | 0 | - | 4.55 | 24,194 |
| U.S. States Bigger than Their Neighbors | 0 | - | 4.28 | 76,288 |
| 50 States, 50 Cities - Easy Version | 0 | - | 4.39 | 128,538 |
| U.S. States with the Most Gun Ownership | 0 | - | 4.45 | 29,746 |
| U.S. States with Oldest Median Age | 0 | - | 4.33 | 42,636 |
| Top 10 U.S. States with the Longest Commutes | 0 | - | 4.28 | 44,465 |
| US States with the Most Executions | 0 | - | 4.51 | 26,413 |
| Top 10 U.S. States with the Most Lighthouses | 0 | - | 4.61 | 29,113 |
| Top 10 Least-Forested U.S. States | 0 | - | 4.50 | 46,583 |
| Top 10 Least White U.S. States | 0 | - | 4.17 | 48,122 |
| Top 10 Least Happy U.S. States | 0 | - | 4.54 | 24,193 |
| Canada Immigration by Country | 0 | - | 4.51 | 62,739 |
| Countries of Europe in 1650 with a Map | 0 | - | 4.95 | 69,796 |
| The Only American Country ... | 0 | - | 4.92 | 121,893 |
| American Countries with the Shortest Names | 0 | - | 4.96 | 121,357 |
| North America Capitals Quiz | 0 | - | 4.99 | 220,889 |
| USA Tourist Attractions by Description #1 | 0 | - | 4.14 | 27,158 |
| Which Island in the United States? | 0 | - | 4.29 | 29,640 |
| American Inventions #1 | 0 | - | 3.63 | 31,516 |
| American Inventions #2 | 0 | - | 3.93 | 15,875 |
| American Foods | 0 | - | 3.66 | 39,413 |
| Biggest U.S. Car Insurance Companies | 0 | - | 4.26 | 6,135 |
| Countries Across the Ocean from the U.S. | 0 | - | 3.95 | 32,297 |
| U.S. Landmarks Picture Quiz | 0 | - | 4.27 | 14,785 |
| U.S. Groups of Four Quiz | 0 | - | 4.39 | 25,374 |
| U.S. Groups of Three Quiz | 0 | - | 4.04 | 20,932 |
| U.S. Analogies | 0 | - | 4.27 | 19,702 |
| Branches of the U.S. Military | 0 | - | 4.39 | 24,429 |
| Name a Valid U.S. President #1 | 0 | - | 4.89 | 192,793 |
| Play-Doh Presidents | 0 | - | 5.00 | 82,551 |
| US States Quiz | 0 | - | 5.00 | 16,933,440 |
| 10 U.S. States with the Most Valuable Crops | 0 | - | 4.41 | 29,607 |
| U.S. States with the Lowest HDI | 0 | - | 4.47 | 28,888 |
| Top 10 U.S. States with the Highest Life Expectancy | 0 | - | 4.33 | 41,693 |
| Canada Country Quiz | 0 | - | 4.54 | 132,744 |
| Canada Cities Map Quiz | 0 | - | 4.64 | 124,412 |
| Canada A-Z | 0 | - | 4.73 | 32,906 |
| Countries of Europe in 1815 With a Map | 0 | - | 4.99 | 150,867 |
| Countries of Europe in 1848 | 0 | - | 4.98 | 83,928 |
| Countries of Europe in 1870 with a Map | 0 | - | 4.95 | 65,235 |
| Every Country of Europe Since 1815 With a Map | 0 | - | 4.98 | 71,430 |
| Countries of Europe in 1360 with a Map | 0 | - | 4.99 | 57,231 |
| Top 10 American Countries by Coastline | 0 | - | 4.96 | 88,494 |
| Top 10 Richest Countries in the Americas | 0 | - | 4.93 | 84,622 |
| Top 10 Biggest Economies in the Americas | 0 | - | 4.94 | 92,478 |
| American Countries With No Atlantic Coastline | 0 | - | 4.94 | 92,619 |
