| United States Map Quiz | 0 | - | 4.98 | 4,141,125 |
| U.S. History Multiple Choice #3 | 0 | - | 4.43 | 24,643 |
| U.S. State Border Crossings | 0 | - | 4.97 | 95,929 |
| U.S. Citizenship Test Questions | 0 | - | 4.83 | 238,285 |
| U.S. Cities with the Most International Tourists | 0 | - | 4.88 | 74,840 |
| Cities and Towns of Massachusetts | 0 | - | 4.92 | 73,033 |
| Countries Larger Than Texas but With Fewer People | 0 | - | 4.92 | 39,467 |
| The United States... or the United Kingdom? | 0 | - | 4.87 | 97,812 |
| States of the U.S. in Alphabetical Order | 0 | - | 4.98 | 365,203 |
| Name the U.S. National Parks | 0 | - | 4.86 | 58,780 |
| Total United States Immigration by Country | 0 | - | 4.91 | 110,619 |
| Most Common U.S. Last Names - Extreme | 0 | - | 4.94 | 173,112 |
| "Do Not Travel" Countries for U.S. Citizens | 0 | - | 4.97 | 240,770 |
| U.S. Cabinet Departments | 0 | - | 4.86 | 72,506 |
| Top 10 Non-English Languages Spoken in New York City | 0 | - | 4.84 | 65,600 |
| Pixelated United States Map | 0 | - | 4.89 | 93,437 |
| Most-Visited Countries by Americans | 0 | - | 4.87 | 108,417 |
| Countries that Visit the United States the Most | 0 | - | 4.96 | 90,814 |
| U.S. History Multiple Choice #1 | 0 | - | 4.31 | 22,152 |
| U.S. History Multiple Choice #4 | 0 | - | 4.26 | 25,486 |
| The 13 Colonies Quiz | 0 | - | 4.97 | 116,682 |
| U.S. States with the Letter Y | 0 | - | 4.85 | 110,321 |
| 10 Southernmost U.S. States | 0 | - | 4.88 | 112,368 |
| U.S. States with Short Names | 0 | - | 4.91 | 147,607 |
| U.S. States that Start with M | 0 | - | 4.93 | 185,865 |
| U.S. States By Population | 0 | - | 4.92 | 152,326 |
| U.S. States that Start with N | 0 | - | 4.95 | 170,356 |
| U.S. States with Longest Names | 0 | - | 4.84 | 43,835 |
| 10 Northernmost U.S. States | 0 | - | 4.90 | 81,877 |
| U.S. States with a Unique First Letter | 0 | - | 4.96 | 87,519 |
| 10 Westernmost U.S. States | 0 | - | 4.95 | 63,745 |
| The Only Remaining U.S. State . . . | 0 | - | 4.92 | 64,855 |
| Top 10 Largest U.S. States by Area | 0 | - | 4.95 | 158,845 |
| Top 10 Smallest U.S. States by Area | 0 | - | 4.98 | 177,064 |
| Top 10 Poorest U.S. States by Median Income | 0 | - | 4.86 | 124,457 |
| U.S. States with the Highest Percentage of Hispanics | 0 | - | 4.85 | 69,054 |
| Top 10 Newest U.S. States | 0 | - | 4.85 | 85,647 |
| Top 10 U.S. States Where the Rent is Too Dang High | 0 | - | 4.84 | 66,808 |
| U.S. History Multiple Choice #5 | 0 | - | 4.26 | 11,480 |
| Countries of North America Quiz | 0 | - | 5.00 | 1,011,246 |
| Countries that Beat the United States | 0 | - | 4.93 | 165,508 |
| Embarrassing Chapters in US History | 0 | - | 4.17 | 32,985 |
| Top 10 Most-Visited U.S. States | 0 | - | 4.90 | 101,065 |
| U.S. States with the Most Immigrants | 0 | - | 4.85 | 81,919 |
| Canada Provinces and Territories | 0 | - | 5.00 | 337,709 |
| Canada Provinces Map Quiz | 0 | - | 4.99 | 635,772 |
| Central America and Caribbean Map Quiz | 0 | - | 4.89 | 899,696 |
| Three Real and One Fake - U.S. History | 0 | - | 4.33 | 25,676 |
| North American Capitals - Map Quiz | 0 | - | 4.87 | 56,920 |
| All First-Level Subdivisions of North America on a Map | 0 | - | 4.97 | 62,906 |
| Red State or Blue State Trait? | 0 | - | 4.42 | 54,924 |
| Old West History | 0 | - | 4.33 | 15,221 |
| Life of Benjamin Franklin | 0 | - | 4.24 | 6,489 |
| American Revolution - Multiple Choice | 0 | - | 4.34 | 19,847 |
| States of Mexico | 0 | - | 4.95 | 173,269 |
| Mexico States Map Quiz | 0 | - | 4.84 | 103,756 |
| Central American Countries | 0 | - | 4.98 | 154,991 |
| Caribbean / Lesser Antilles Map Quiz | 0 | - | 4.99 | 145,800 |
| Territories of the United States | 0 | - | 4.79 | 52,126 |
| Five Biggest Immigrant Groups by Decade in the US | 0 | - | 4.78 | 39,365 |
| Most Mentioned Enemies of the USA | 0 | - | 4.77 | 174,509 |
| Major non-NATO U.S. Allies | 0 | - | 4.52 | 51,717 |
| New York City Geography | 0 | - | 4.42 | 32,913 |
| Events in U.S. History | 0 | - | 4.40 | 28,467 |
| U.S. State Nicknames Quiz | 0 | - | 4.47 | 50,254 |
| Countries with American Expatriates | 0 | - | 4.53 | 42,468 |
| United States Landmarks Map Quiz | 0 | - | 4.55 | 40,072 |
| United States Country Quiz | 0 | - | 4.43 | 100,542 |
| Busiest Air Routes from the U.S. | 0 | - | 4.46 | 76,590 |
| The U.S. Government - How Does it Work? | 0 | - | 4.34 | 42,151 |
| U.S. Presidents Quiz | 0 | - | 5.00 | 3,652,452 |
| Deadliest U.S. Wars | 0 | - | 4.89 | 189,208 |
| The Life of Thomas Edison | 0 | - | 4.03 | 4,893 |
| Valid Answer - U.S. History | 0 | - | 4.24 | 22,445 |
| Countries Closest to Canada | 0 | - | 4.90 | 197,318 |
| Asian Countries Americans Travel to the Most | 0 | - | 4.75 | 59,637 |
| Countries Closest to the U. S. | 0 | - | 4.41 | 207,796 |
| American Geography Quiz for Dummies | 0 | - | 4.41 | 68,692 |
| Top 10 Non-English Languages of Los Angeles | 0 | - | 4.42 | 59,580 |
| New England States | 0 | - | 4.51 | 59,704 |
| U.S. States by Land Area | 0 | - | 4.61 | 52,468 |
| Top 10 U.S. States by Inland Water Area | 0 | - | 4.53 | 37,880 |
| Add a Letter - Make a U.S. State | 0 | - | 4.72 | 82,300 |
| Top 10 Widest U.S. States East to West | 0 | - | 4.69 | 55,618 |
| Top 10 Tallest U.S. States North to South | 0 | - | 4.74 | 40,654 |
| U.S. States by Borders | 0 | - | 4.63 | 35,058 |
| Save Americans by Guessing U.S. States | 0 | - | 4.61 | 182,437 |
| Which U.S. State - Multiple Choice | 0 | - | 4.48 | 20,195 |
| 10 Easternmost U.S. States | 0 | - | 4.53 | 56,227 |
| The Only U.S. State ... #1 | 0 | - | 4.52 | 101,121 |
| 50 States, 50 Cities - Hard Version | 0 | - | 4.46 | 43,981 |
| U.S. States with the Most Expensive Home Prices | 0 | - | 4.48 | 99,296 |
| U.S. States with the Cheapest Home Prices | 0 | - | 4.70 | 32,770 |
| Top 10 Most African-American U.S. States | 0 | - | 4.46 | 74,409 |
| Top 10 Most Asian U.S. States | 0 | - | 4.80 | 74,863 |
| Top 10 Most Obese U.S. States | 0 | - | 4.54 | 81,199 |
| Top 10 Least Obese U.S. States | 0 | - | 4.75 | 73,403 |
| Top 10 Least-Educated U.S. States | 0 | - | 4.43 | 89,951 |
| Top 10 Most-Educated U.S. States | 0 | - | 4.48 | 84,306 |
| U.S. States with the Highest Rates of Homelessness | 0 | - | 4.43 | 52,142 |
| Top 10 Most White U.S. States | 0 | - | 4.49 | 81,843 |
| Top 10 Most German U.S. States | 0 | - | 4.48 | 59,555 |
| Ten Most Rectangular U.S. States | 0 | - | 4.54 | 70,879 |
| Countries that Beat Canada | 0 | - | 4.90 | 86,831 |
| U.S. Federal Holidays | 0 | - | 4.33 | 99,087 |
| Recommended Childhood Vaccines for Americans | 0 | - | 4.42 | 14,630 |
| 75 Americans Named John | 0 | - | 4.41 | 23,821 |
| California Multiple Choice | 0 | - | 4.40 | 28,037 |
| Florida Multiple Choice | 0 | - | 4.33 | 10,165 |
| History of Pennsylvania | 0 | - | 4.16 | 7,087 |
| History of Virginia | 0 | - | 4.31 | 11,555 |
| Georgia ... or Georgia? | 0 | - | 4.69 | 76,401 |
| Flags of North and South America | 0 | - | 4.99 | 366,774 |
| South America Map Quiz | 0 | - | 5.00 | 1,540,894 |
| Belize Country Quiz | 0 | - | 4.85 | 20,795 |
| Saint Vincent and the Grenadines Country Quiz | 0 | - | 4.88 | 19,041 |
| Top U.S. Universities | 0 | - | 4.15 | 144,025 |
| Largest United States Airlines | 0 | - | 4.39 | 54,831 |
| U.S. States by Governor | 0 | - | 4.43 | 17,979 |
| U.S. Political Parties in History | 0 | - | 4.44 | 27,570 |
| U.S. Government Agencies | 0 | - | 4.44 | 19,545 |
| U.S. Presidents by Picture | 0 | - | 4.87 | 423,571 |
| Florida Pro Sport Teams | 0 | - | 4.61 | 11,751 |
| Boston Talk to English Translation Quiz | 0 | - | 4.59 | 55,679 |
| North Carolina... or South Carolina? | 0 | - | 4.21 | 10,477 |
| U.S. States with the Highest Percentage of Farmland | 0 | - | 4.80 | 65,270 |
| U.S. States with the Lowest Percentage of Farmland | 0 | - | 4.74 | 55,022 |
| Top 10 U.S. States with the Lowest Life Expectancy | 0 | - | 4.67 | 44,956 |
| Top 10 U.S. States with the Highest Elevation | 0 | - | 4.51 | 67,762 |
| Top 10 U.S. States That Grow the Most Corn | 0 | - | 4.52 | 36,014 |
| Top 10 U.S. States People are Leaving | 0 | - | 4.42 | 59,008 |
| Top 10 U.S. States People are Moving To | 0 | - | 4.73 | 63,481 |
| U.S. States with the Lowest Average Elevation | 0 | - | 4.55 | 38,386 |
| U.S. States With the Highest Average Elevation | 0 | - | 4.61 | 32,662 |
| Latin American Countries Map Quiz | 0 | - | 4.97 | 128,108 |
| Dominica Country Quiz | 0 | - | 4.81 | 19,663 |
| Third Most Common Language by U.S. State | 0 | - | 4.89 | 113,369 |
| American Legal Vocabulary | 0 | - | 4.40 | 33,787 |
| U.S. Cities by Picture #1 | 0 | - | 4.37 | 34,347 |
| Cities by Picture #2 | 0 | - | 4.19 | 34,929 |
| First Names of U.S. Presidents | 0 | - | 4.85 | 379,493 |
| Washington... or Washington D.C.? | 0 | - | 4.33 | 26,450 |
| People on Money - United States | 0 | - | 4.31 | 63,202 |
| U.S. History Groups of Two | 0 | - | 4.23 | 44,234 |
| Last 10 U.S. States Alphabetically | 0 | - | 4.35 | 74,594 |
| Top 10 Least Populous U.S. State Capitals | 0 | - | 4.52 | 21,461 |
| Flyover States | 0 | - | 4.52 | 29,385 |
| U.S. States With Double Letters | 0 | - | 4.54 | 23,905 |
| U.S. States Bigger than Their Neighbors | 0 | - | 4.27 | 75,793 |
| 50 States, 50 Cities - Easy Version | 0 | - | 4.39 | 127,980 |
| U.S. States with the Most Gun Ownership | 0 | - | 4.44 | 29,576 |
| U.S. States with Oldest Median Age | 0 | - | 4.33 | 42,354 |
| Top 10 U.S. States with the Longest Commutes | 0 | - | 4.28 | 44,149 |
| US States with the Most Executions | 0 | - | 4.51 | 26,347 |
| Top 10 U.S. States with the Most Lighthouses | 0 | - | 4.61 | 28,916 |
| Top 10 Least-Forested U.S. States | 0 | - | 4.50 | 46,304 |
| Top 10 Least White U.S. States | 0 | - | 4.17 | 47,598 |
| Slowest Growing U.S. States Since 1960 | 0 | - | 4.40 | 40,060 |
| Top 10 Least Happy U.S. States | 0 | - | 4.54 | 24,022 |
| Canada Immigration by Country | 0 | - | 4.51 | 62,211 |
| Countries of Europe in 1650 with a Map | 0 | - | 4.95 | 67,284 |
| The Only American Country ... | 0 | - | 4.92 | 120,719 |
| American Countries with the Shortest Names | 0 | - | 4.96 | 120,308 |
| Caribbean Countries and Territories | 0 | - | 4.80 | 112,308 |
| North America Capitals Quiz | 0 | - | 4.99 | 216,755 |
| USA Tourist Attractions by Description #1 | 0 | - | 4.14 | 27,032 |
| Which Island in the United States? | 0 | - | 4.29 | 29,145 |
| American Inventions #1 | 0 | - | 3.63 | 31,460 |
| American Inventions #2 | 0 | - | 3.93 | 15,826 |
| American Foods | 0 | - | 3.66 | 39,272 |
| Biggest U.S. Car Insurance Companies | 0 | - | 4.26 | 6,109 |
| U.S. Landmarks Picture Quiz | 0 | - | 4.26 | 14,665 |
| U.S. Groups of Four Quiz | 0 | - | 4.39 | 25,180 |
| U.S. Groups of Three Quiz | 0 | - | 4.04 | 20,798 |
| U.S. Analogies | 0 | - | 4.27 | 19,602 |
| Branches of the U.S. Military | 0 | - | 4.40 | 24,149 |
| Name a Valid U.S. President #1 | 0 | - | 4.89 | 189,768 |
| Play-Doh Presidents | 0 | - | 5.00 | 81,653 |
| US States Quiz | 0 | - | 5.00 | 16,693,130 |
| 10 U.S. States with the Most Valuable Crops | 0 | - | 4.41 | 29,490 |
| U.S. States with the Lowest HDI | 0 | - | 4.46 | 28,762 |
| Top 10 U.S. States with the Highest Life Expectancy | 0 | - | 4.33 | 41,571 |
| Canada Country Quiz | 0 | - | 4.54 | 131,682 |
| Canada Cities Map Quiz | 0 | - | 4.63 | 123,587 |
| Canada A-Z | 0 | - | 4.73 | 32,640 |
| Countries of Europe in 1815 With a Map | 0 | - | 4.99 | 148,875 |
| Countries of Europe in 1848 | 0 | - | 4.98 | 75,377 |
| Countries of Europe in 1870 with a Map | 0 | - | 4.95 | 63,334 |
| Every Country of Europe Since 1815 With a Map | 0 | - | 4.98 | 70,063 |
| Countries of Europe in 1360 with a Map | 0 | - | 4.99 | 55,973 |
| Countries of the Mongol Empire on a Map | 0 | - | 4.99 | 105,826 |
| Biggest Mongol Empire Countries | 0 | - | 4.89 | 80,643 |
| Top 10 American Countries by Coastline | 0 | - | 4.96 | 88,062 |
| Top 10 Richest Countries in the Americas | 0 | - | 4.90 | 76,076 |
| Top 10 Biggest Economies in the Americas | 0 | - | 4.94 | 91,053 |
| American Countries With No Atlantic Coastline | 0 | - | 4.94 | 91,875 |
| History of Mexico | 0 | - | 4.58 | 15,227 |
| Countries of South America with an Empty Map | 0 | - | 4.94 | 104,121 |
| All First-Level Subdivisions of South America on a Map | 0 | - | 4.92 | 52,906 |
| Brazil States Map Quiz | 0 | - | 4.85 | 47,364 |
