| United States Map Quiz | 0 | - | 4.98 | 4,174,029 |
| U.S. History Multiple Choice #3 | 0 | - | 4.43 | 24,810 |
| U.S. State Border Crossings | 0 | - | 4.97 | 96,977 |
| U.S. Citizenship Test Questions | 0 | - | 4.83 | 241,012 |
| U.S. Cities with the Most International Tourists | 0 | - | 4.88 | 76,092 |
| Cities and Towns of Massachusetts | 0 | - | 4.93 | 75,269 |
| Countries Larger Than Texas but With Fewer People | 0 | - | 4.92 | 40,347 |
| The United States... or the United Kingdom? | 0 | - | 4.87 | 99,222 |
| States of the U.S. in Alphabetical Order | 0 | - | 4.98 | 368,944 |
| Name the U.S. National Parks | 0 | - | 4.86 | 60,613 |
| Total United States Immigration by Country | 0 | - | 4.91 | 112,595 |
| Most Common U.S. Last Names - Extreme | 0 | - | 4.94 | 175,869 |
| "Do Not Travel" Countries for U.S. Citizens | 0 | - | 4.97 | 247,149 |
| U.S. Cabinet Departments | 0 | - | 4.86 | 73,179 |
| Top 10 Non-English Languages Spoken in New York City | 0 | - | 4.85 | 66,843 |
| Pixelated United States Map | 0 | - | 4.89 | 94,990 |
| Most-Visited Countries by Americans | 0 | - | 4.86 | 110,785 |
| Countries that Visit the United States the Most | 0 | - | 4.96 | 92,637 |
| U.S. History Multiple Choice #4 | 0 | - | 4.24 | 25,684 |
| The 13 Colonies Quiz | 0 | - | 4.97 | 119,226 |
| U.S. States with the Letter Y | 0 | - | 4.86 | 112,468 |
| 10 Southernmost U.S. States | 0 | - | 4.89 | 114,486 |
| U.S. States with Short Names | 0 | - | 4.91 | 150,562 |
| U.S. States that Start with M | 0 | - | 4.94 | 188,613 |
| U.S. States By Population | 0 | - | 4.92 | 154,277 |
| U.S. States that Start with N | 0 | - | 4.95 | 172,408 |
| U.S. States with Longest Names | 0 | - | 4.85 | 45,005 |
| 10 Northernmost U.S. States | 0 | - | 4.90 | 83,191 |
| U.S. States with a Unique First Letter | 0 | - | 4.96 | 89,001 |
| 10 Westernmost U.S. States | 0 | - | 4.95 | 64,613 |
| The Only Remaining U.S. State . . . | 0 | - | 4.93 | 66,233 |
| Top 10 Largest U.S. States by Area | 0 | - | 4.95 | 161,199 |
| Top 10 Smallest U.S. States by Area | 0 | - | 4.98 | 178,334 |
| Top 10 Poorest U.S. States by Median Income | 0 | - | 4.86 | 125,791 |
| U.S. States with the Highest Percentage of Hispanics | 0 | - | 4.85 | 69,886 |
| Top 10 Newest U.S. States | 0 | - | 4.85 | 86,736 |
| Top 10 U.S. States Where the Rent is Too Dang High | 0 | - | 4.85 | 68,078 |
| U.S. History Multiple Choice #5 | 0 | - | 4.26 | 11,612 |
| Countries of North America Quiz | 0 | - | 5.00 | 1,033,787 |
| Countries that Beat the United States | 0 | - | 4.93 | 168,964 |
| Events in U.S. History | 0 | - | 4.41 | 28,866 |
| Embarrassing Chapters in US History | 0 | - | 4.17 | 33,224 |
| Top 10 Most-Visited U.S. States | 0 | - | 4.90 | 102,601 |
| U.S. States with the Most Immigrants | 0 | - | 4.85 | 83,128 |
| Canada Provinces and Territories | 0 | - | 5.00 | 347,269 |
| Canada Provinces Map Quiz | 0 | - | 4.99 | 645,522 |
| Central America and Caribbean Map Quiz | 0 | - | 4.90 | 905,586 |
| Three Real and One Fake - U.S. History | 0 | - | 4.33 | 25,863 |
| New York True or False? | 0 | - | 4.53 | 33,994 |
| North American Capitals - Map Quiz | 0 | - | 4.88 | 59,013 |
| All First-Level Subdivisions of North America on a Map | 0 | - | 4.97 | 65,360 |
| Red State or Blue State Trait? | 0 | - | 4.42 | 55,787 |
| Old West History | 0 | - | 4.34 | 15,309 |
| Life of Benjamin Franklin | 0 | - | 4.24 | 6,540 |
| American Revolution - Multiple Choice | 0 | - | 4.34 | 20,000 |
| States of Mexico | 0 | - | 4.96 | 178,854 |
| Mexico States Map Quiz | 0 | - | 4.85 | 105,808 |
| Central American Countries | 0 | - | 4.98 | 157,589 |
| Caribbean Countries and Territories | 0 | - | 4.81 | 113,705 |
| Caribbean / Lesser Antilles Map Quiz | 0 | - | 4.99 | 151,182 |
| Territories of the United States | 0 | - | 4.80 | 52,682 |
| Five Biggest Immigrant Groups by Decade in the US | 0 | - | 4.79 | 39,939 |
| Most Mentioned Enemies of the USA | 0 | - | 4.77 | 176,286 |
| Major non-NATO U.S. Allies | 0 | - | 4.52 | 52,612 |
| New York City Geography | 0 | - | 4.43 | 33,205 |
| U.S. State Nicknames | 0 | - | 4.47 | 50,815 |
| Countries with American Expatriates | 0 | - | 4.53 | 42,702 |
| United States Landmarks Map Quiz | 0 | - | 4.55 | 40,297 |
| United States Country Quiz | 0 | - | 4.43 | 102,375 |
| Busiest Air Routes from the U.S. | 0 | - | 4.46 | 77,111 |
| The U.S. Government - How Does it Work? | 0 | - | 4.34 | 42,505 |
| U.S. Presidents Quiz | 0 | - | 5.00 | 3,732,216 |
| Florida True or False? | 0 | - | 4.48 | 28,806 |
| Deadliest U.S. Wars | 0 | - | 4.89 | 192,058 |
| Valid Answer - U.S. History | 0 | - | 4.24 | 22,626 |
| Most-Visited Countries by Canadians | 0 | - | 4.83 | 39,671 |
| Countries Closest to Canada | 0 | - | 4.91 | 199,698 |
| Asian Countries Americans Travel to the Most | 0 | - | 4.75 | 60,270 |
| Countries Closest to the U. S. | 0 | - | 4.41 | 210,791 |
| American Geography Quiz for Dummies | 0 | - | 4.41 | 69,499 |
| Top 10 Non-English Languages of Los Angeles | 0 | - | 4.43 | 60,176 |
| New England States | 0 | - | 4.51 | 59,915 |
| U.S. States by Land Area | 0 | - | 4.55 | 53,121 |
| Top 10 U.S. States by Inland Water Area | 0 | - | 4.53 | 38,141 |
| Add a Letter - Make a U.S. State | 0 | - | 4.70 | 83,247 |
| Top 10 Widest U.S. States East to West | 0 | - | 4.70 | 56,346 |
| Top 10 Tallest U.S. States North to South | 0 | - | 4.75 | 41,195 |
| U.S. States by Borders | 0 | - | 4.61 | 35,518 |
| Save Americans by Guessing U.S. States | 0 | - | 4.61 | 189,353 |
| Which U.S. State - Multiple Choice | 0 | - | 4.48 | 20,389 |
| 10 Easternmost U.S. States | 0 | - | 4.53 | 56,729 |
| The Only U.S. State ... #1 | 0 | - | 4.52 | 102,412 |
| 50 States, 50 Cities - Hard Version | 0 | - | 4.46 | 44,488 |
| U.S. States with the Most Expensive Home Prices | 0 | - | 4.48 | 99,992 |
| U.S. States with the Cheapest Home Prices | 0 | - | 4.74 | 33,278 |
| Top 10 Most African-American U.S. States | 0 | - | 4.46 | 74,859 |
| Top 10 Most Asian U.S. States | 0 | - | 4.80 | 75,545 |
| Top 10 Most Obese U.S. States | 0 | - | 4.54 | 81,544 |
| Top 10 Least Obese U.S. States | 0 | - | 4.75 | 73,913 |
| Top 10 Least-Educated U.S. States | 0 | - | 4.43 | 91,471 |
| Top 10 Most-Educated U.S. States | 0 | - | 4.48 | 85,357 |
| U.S. States with the Highest Rates of Homelessness | 0 | - | 4.43 | 52,622 |
| Top 10 Most White U.S. States | 0 | - | 4.49 | 83,184 |
| Top 10 Most German U.S. States | 0 | - | 4.48 | 60,347 |
| Ten Most Rectangular U.S. States | 0 | - | 4.54 | 71,829 |
| Countries that Beat Canada | 0 | - | 4.90 | 99,154 |
| U.S. Federal Holidays | 0 | - | 4.33 | 99,655 |
| Recommended Childhood Vaccines for Americans | 0 | - | 4.42 | 14,782 |
| 75 Americans Named John | 0 | - | 4.41 | 23,994 |
| California Multiple Choice | 0 | - | 4.40 | 28,201 |
| Florida Multiple Choice | 0 | - | 4.33 | 10,216 |
| History of Pennsylvania | 0 | - | 4.16 | 7,174 |
| History of Virginia | 0 | - | 4.33 | 11,649 |
| Flags of North and South America | 0 | - | 4.99 | 378,361 |
| South America Map Quiz | 0 | - | 5.00 | 1,558,807 |
| Belize Country Quiz | 0 | - | 4.85 | 21,123 |
| Saint Vincent and the Grenadines Country Quiz | 0 | - | 4.88 | 19,324 |
| Top U.S. Universities | 0 | - | 4.15 | 146,030 |
| Largest United States Airlines | 0 | - | 4.39 | 55,190 |
| U.S. States by Governor | 0 | - | 4.43 | 18,125 |
| U.S. Political Parties in History | 0 | - | 4.44 | 27,789 |
| U.S. Government Agencies | 0 | - | 4.44 | 19,809 |
| U.S. Presidents by Picture | 0 | - | 4.87 | 428,952 |
| Florida Pro Sport Teams | 0 | - | 4.61 | 11,920 |
| Boston Talk to English Translation Quiz | 0 | - | 4.59 | 56,306 |
| North Carolina... or South Carolina? | 0 | - | 4.21 | 10,577 |
| U.S. States with the Highest Percentage of Farmland | 0 | - | 4.80 | 65,696 |
| U.S. States with the Lowest Percentage of Farmland | 0 | - | 4.70 | 61,567 |
| Top 10 U.S. States with the Lowest Life Expectancy | 0 | - | 4.62 | 45,300 |
| Top 10 U.S. States with the Highest Elevation | 0 | - | 4.51 | 67,998 |
| Top 10 U.S. States That Grow the Most Corn | 0 | - | 4.52 | 36,300 |
| Top 10 U.S. States People are Leaving | 0 | - | 4.44 | 70,764 |
| Top 10 U.S. States People are Moving To | 0 | - | 4.74 | 64,262 |
| U.S. States with the Lowest Average Elevation | 0 | - | 4.55 | 38,587 |
| U.S. States With the Highest Average Elevation | 0 | - | 4.61 | 32,854 |
| Canada True or False? | 0 | - | 4.57 | 55,198 |
| Georgia ... or Georgia? | 0 | - | 4.68 | 77,110 |
| Latin American Countries Map Quiz | 0 | - | 4.98 | 130,905 |
| Dominica Country Quiz | 0 | - | 4.81 | 19,969 |
| Third Most Common Language by U.S. State | 0 | - | 4.87 | 114,043 |
| American Legal Vocabulary | 0 | - | 4.40 | 34,052 |
| U.S. Cities by Picture #1 | 0 | - | 4.36 | 34,770 |
| Cities by Picture #2 | 0 | - | 4.19 | 35,340 |
| First Names of U.S. Presidents | 0 | - | 4.86 | 383,961 |
| Washington... or Washington D.C.? | 0 | - | 4.33 | 26,601 |
| People on Money - United States | 0 | - | 4.31 | 63,505 |
| U.S. History Groups of Two | 0 | - | 4.23 | 44,638 |
| The Life of Thomas Edison | 0 | - | 3.95 | 4,931 |
| Last 10 U.S. States Alphabetically | 0 | - | 4.35 | 75,126 |
| Top 10 Least Populous U.S. State Capitals | 0 | - | 4.52 | 21,581 |
| Flyover States | 0 | - | 4.53 | 29,619 |
| U.S. States With Double Letters | 0 | - | 4.55 | 24,313 |
| U.S. States Bigger than Their Neighbors | 0 | - | 4.28 | 76,466 |
| 50 States, 50 Cities - Easy Version | 0 | - | 4.39 | 129,057 |
| U.S. States with the Most Gun Ownership | 0 | - | 4.45 | 29,825 |
| U.S. States with Oldest Median Age | 0 | - | 4.33 | 42,747 |
| Top 10 U.S. States with the Longest Commutes | 0 | - | 4.28 | 44,575 |
| US States with the Most Executions | 0 | - | 4.51 | 26,432 |
| Top 10 U.S. States with the Most Lighthouses | 0 | - | 4.61 | 29,189 |
| Top 10 Least-Forested U.S. States | 0 | - | 4.50 | 46,716 |
| Top 10 Least White U.S. States | 0 | - | 4.17 | 48,340 |
| Slowest Growing U.S. States Since 1960 | 0 | - | 4.40 | 47,142 |
| Top 10 Least Happy U.S. States | 0 | - | 4.54 | 24,278 |
| Canada Immigration by Country | 0 | - | 4.51 | 62,948 |
| Countries of Europe in 1650 with a Map | 0 | - | 4.95 | 70,803 |
| The Only American Country ... | 0 | - | 4.92 | 122,379 |
| American Countries with the Shortest Names | 0 | - | 4.97 | 121,802 |
| North America Capitals Quiz | 0 | - | 4.99 | 222,766 |
| USA Tourist Attractions by Description #1 | 0 | - | 4.14 | 27,213 |
| Which Island in the United States? | 0 | - | 4.29 | 29,841 |
| American Inventions #1 | 0 | - | 3.62 | 31,541 |
| American Inventions #2 | 0 | - | 3.93 | 15,906 |
| American Foods | 0 | - | 3.66 | 39,459 |
| Biggest U.S. Car Insurance Companies | 0 | - | 4.26 | 6,162 |
| Countries Across the Ocean from the U.S. | 0 | - | 3.95 | 32,353 |
| U.S. Landmarks Picture Quiz | 0 | - | 4.27 | 14,841 |
| U.S. Groups of Four Quiz | 0 | - | 4.39 | 25,468 |
| U.S. Groups of Three Quiz | 0 | - | 4.04 | 20,999 |
| U.S. Analogies | 0 | - | 4.27 | 19,729 |
| Branches of the U.S. Military | 0 | - | 4.40 | 24,555 |
| Name a Valid U.S. President #1 | 0 | - | 4.89 | 194,079 |
| Play-Doh Presidents | 0 | - | 5.00 | 82,978 |
| US States Quiz | 0 | - | 5.00 | 17,028,536 |
| 10 U.S. States with the Most Valuable Crops | 0 | - | 4.41 | 29,644 |
| U.S. States with the Lowest HDI | 0 | - | 4.47 | 28,947 |
| Top 10 U.S. States with the Highest Life Expectancy | 0 | - | 4.33 | 41,747 |
| Canada Country Quiz | 0 | - | 4.55 | 133,209 |
| Canada Cities Map Quiz | 0 | - | 4.64 | 124,708 |
| Canada A-Z | 0 | - | 4.73 | 33,000 |
| Countries of Europe in 1815 With a Map | 0 | - | 4.99 | 151,606 |
| Countries of Europe in 1848 | 0 | - | 4.98 | 86,164 |
| Countries of Europe in 1870 with a Map | 0 | - | 4.95 | 66,060 |
| Every Country of Europe Since 1815 With a Map | 0 | - | 4.97 | 72,057 |
| Countries of Europe in 1360 with a Map | 0 | - | 4.99 | 57,761 |
| Top 10 American Countries by Coastline | 0 | - | 4.96 | 88,676 |
| Top 10 Richest Countries in the Americas | 0 | - | 4.92 | 95,751 |
| Top 10 Biggest Economies in the Americas | 0 | - | 4.94 | 92,979 |
| American Countries With No Atlantic Coastline | 0 | - | 4.93 | 92,920 |
| History of Mexico | 0 | - | 4.52 | 15,376 |
| Countries of South America with an Empty Map | 0 | - | 4.95 | 105,649 |
