| United States Map Quiz | 0 | - | 4.98 | 4,158,756 |
| U.S. State Border Crossings | 0 | - | 4.97 | 96,486 |
| U.S. Citizenship Test Questions | 0 | - | 4.83 | 239,483 |
| U.S. Cities with the Most International Tourists | 0 | - | 4.88 | 75,480 |
| Cities and Towns of Massachusetts | 0 | - | 4.92 | 74,079 |
| Countries Larger Than Texas but With Fewer People | 0 | - | 4.92 | 39,948 |
| Name the U.S. National Parks | 0 | - | 4.86 | 59,957 |
| Total United States Immigration by Country | 0 | - | 4.91 | 111,664 |
| Most Common U.S. Last Names - Extreme | 0 | - | 4.94 | 174,522 |
| "Do Not Travel" Countries for U.S. Citizens | 0 | - | 4.97 | 244,097 |
| U.S. Cabinet Departments | 0 | - | 4.86 | 72,883 |
| Top 10 Non-English Languages Spoken in New York City | 0 | - | 4.85 | 66,238 |
| States of the U.S. in Alphabetical Order | 0 | - | 4.98 | 367,085 |
| Pixelated United States Map | 0 | - | 4.87 | 94,281 |
| Most-Visited Countries by Americans | 0 | - | 4.86 | 109,697 |
| Countries that Visit the United States the Most | 0 | - | 4.96 | 91,777 |
| The 13 Colonies Quiz | 0 | - | 4.97 | 117,881 |
| U.S. States with the Letter Y | 0 | - | 4.85 | 111,441 |
| 10 Southernmost U.S. States | 0 | - | 4.88 | 113,450 |
| U.S. States with Short Names | 0 | - | 4.91 | 149,023 |
| U.S. States that Start with M | 0 | - | 4.93 | 187,310 |
| U.S. States By Population | 0 | - | 4.92 | 153,555 |
| U.S. States that Start with N | 0 | - | 4.95 | 171,465 |
| U.S. States with Longest Names | 0 | - | 4.84 | 44,446 |
| 10 Northernmost U.S. States | 0 | - | 4.90 | 82,526 |
| U.S. States with a Unique First Letter | 0 | - | 4.96 | 88,316 |
| 10 Westernmost U.S. States | 0 | - | 4.95 | 64,214 |
| The Only Remaining U.S. State . . . | 0 | - | 4.93 | 65,630 |
| Top 10 Largest U.S. States by Area | 0 | - | 4.95 | 159,976 |
| Top 10 Smallest U.S. States by Area | 0 | - | 4.98 | 177,722 |
| Top 10 Poorest U.S. States by Median Income | 0 | - | 4.86 | 125,196 |
| U.S. States with the Highest Percentage of Hispanics | 0 | - | 4.85 | 69,510 |
| Top 10 Newest U.S. States | 0 | - | 4.85 | 86,234 |
| Top 10 U.S. States Where the Rent is Too Dang High | 0 | - | 4.85 | 67,524 |
| Countries of North America Quiz | 0 | - | 5.00 | 1,023,424 |
| Events in U.S. History | 0 | - | 4.41 | 28,673 |
| Embarrassing Chapters in US History | 0 | - | 4.17 | 33,114 |
| Canada Provinces and Territories | 0 | - | 5.00 | 342,642 |
| Canada Provinces Map Quiz | 0 | - | 4.99 | 640,520 |
| Countries that Beat the United States | 0 | - | 4.93 | 167,480 |
| Top 10 Most-Visited U.S. States | 0 | - | 4.90 | 101,772 |
| U.S. States with the Most Immigrants | 0 | - | 4.85 | 82,480 |
| The United States... or the United Kingdom? | 0 | - | 4.87 | 98,554 |
| U.S. History Multiple Choice #3 | 0 | - | 4.43 | 24,736 |
| Central America and Caribbean Map Quiz | 0 | - | 4.89 | 902,377 |
| North American Capitals - Map Quiz | 0 | - | 4.87 | 58,006 |
| All First-Level Subdivisions of North America on a Map | 0 | - | 4.97 | 64,185 |
| Old West History | 0 | - | 4.34 | 15,276 |
| Life of Benjamin Franklin | 0 | - | 4.24 | 6,519 |
| American Revolution - Multiple Choice | 0 | - | 4.34 | 19,932 |
| States of Mexico | 0 | - | 4.96 | 176,148 |
| Mexico States Map Quiz | 0 | - | 4.84 | 104,750 |
| Central American Countries | 0 | - | 4.98 | 156,490 |
| Caribbean / Lesser Antilles Map Quiz | 0 | - | 4.99 | 148,464 |
| Territories of the United States | 0 | - | 4.80 | 52,400 |
| Five Biggest Immigrant Groups by Decade in the US | 0 | - | 4.79 | 39,678 |
| Most Mentioned Enemies of the USA | 0 | - | 4.77 | 175,475 |
| Major non-NATO U.S. Allies | 0 | - | 4.52 | 52,195 |
| New York City Geography | 0 | - | 4.42 | 33,103 |
| U.S. State Nicknames | 0 | - | 4.47 | 50,527 |
| Countries with American Expatriates | 0 | - | 4.53 | 42,586 |
| United States Landmarks Map Quiz | 0 | - | 4.55 | 40,180 |
| United States Country Quiz | 0 | - | 4.43 | 101,531 |
| Busiest Air Routes from the U.S. | 0 | - | 4.46 | 76,887 |
| Asian Countries Americans Travel to the Most | 0 | - | 4.75 | 59,986 |
| U.S. Presidents Quiz | 0 | - | 5.00 | 3,699,310 |
| Deadliest U.S. Wars | 0 | - | 4.89 | 190,811 |
| U.S. History Multiple Choice #2 | 0 | - | 4.32 | 25,074 |
| U.S. History Multiple Choice #1 | 0 | - | 4.31 | 22,243 |
| Valid Answer - U.S. History | 0 | - | 4.24 | 22,538 |
| U.S. History Multiple Choice #4 | 0 | - | 4.26 | 25,592 |
| Most-Visited Countries by Canadians | 0 | - | 4.82 | 39,394 |
| Countries Closest to Canada | 0 | - | 4.91 | 198,364 |
| U.S. History Multiple Choice #5 | 0 | - | 4.26 | 11,558 |
| U.S. Federal Holidays | 0 | - | 4.33 | 99,464 |
| Recommended Childhood Vaccines for Americans | 0 | - | 4.42 | 14,718 |
| Countries Closest to the U. S. | 0 | - | 4.41 | 209,501 |
| American Geography Quiz for Dummies | 0 | - | 4.41 | 69,157 |
| 75 Americans Named John | 0 | - | 4.41 | 23,905 |
| Top 10 Non-English Languages of Los Angeles | 0 | - | 4.42 | 59,890 |
| New England States | 0 | - | 4.51 | 59,811 |
| U.S. States by Land Area | 0 | - | 4.61 | 52,821 |
| Top 10 U.S. States by Inland Water Area | 0 | - | 4.53 | 38,013 |
| Add a Letter - Make a U.S. State | 0 | - | 4.72 | 82,823 |
| Top 10 Widest U.S. States East to West | 0 | - | 4.70 | 56,011 |
| Top 10 Tallest U.S. States North to South | 0 | - | 4.74 | 40,933 |
| U.S. States by Borders | 0 | - | 4.61 | 35,318 |
| Save Americans by Guessing U.S. States | 0 | - | 4.63 | 185,854 |
| 10 Easternmost U.S. States | 0 | - | 4.53 | 56,484 |
| The Only U.S. State ... #1 | 0 | - | 4.52 | 102,045 |
| 50 States, 50 Cities - Hard Version | 0 | - | 4.46 | 44,228 |
| U.S. States with the Most Expensive Home Prices | 0 | - | 4.48 | 99,665 |
| U.S. States with the Cheapest Home Prices | 0 | - | 4.70 | 33,039 |
| Top 10 Most African-American U.S. States | 0 | - | 4.46 | 74,671 |
| Top 10 Most Asian U.S. States | 0 | - | 4.80 | 75,200 |
| Top 10 Most Obese U.S. States | 0 | - | 4.54 | 81,382 |
| Top 10 Least Obese U.S. States | 0 | - | 4.75 | 73,685 |
| Top 10 Least-Educated U.S. States | 0 | - | 4.43 | 90,908 |
| Top 10 Most-Educated U.S. States | 0 | - | 4.48 | 84,863 |
| U.S. States with the Highest Rates of Homelessness | 0 | - | 4.43 | 52,422 |
| Top 10 Most White U.S. States | 0 | - | 4.49 | 82,579 |
| Top 10 Most German U.S. States | 0 | - | 4.48 | 59,978 |
| Slowest Growing U.S. States Since 1960 | 0 | - | 4.43 | 46,914 |
| Countries that Beat Canada | 0 | - | 4.91 | 97,650 |
| Red State or Blue State Trait? | 0 | - | 4.42 | 55,373 |
| History of Pennsylvania | 0 | - | 4.16 | 7,139 |
| History of Virginia | 0 | - | 4.31 | 11,600 |
| U.S. States with the Highest Percentage of Farmland | 0 | - | 4.80 | 65,485 |
| U.S. States with the Lowest Percentage of Farmland | 0 | - | 4.74 | 55,189 |
| Top 10 U.S. States with the Lowest Life Expectancy | 0 | - | 4.61 | 45,137 |
| Top 10 U.S. States with the Highest Elevation | 0 | - | 4.51 | 67,876 |
| Top 10 U.S. States That Grow the Most Corn | 0 | - | 4.52 | 36,163 |
| Top 10 U.S. States People are Leaving | 0 | - | 4.42 | 59,448 |
| Top 10 U.S. States People are Moving To | 0 | - | 4.74 | 63,870 |
| U.S. States with the Lowest Average Elevation | 0 | - | 4.55 | 38,499 |
| U.S. States With the Highest Average Elevation | 0 | - | 4.61 | 32,775 |
| Georgia ... or Georgia? | 0 | - | 4.67 | 76,779 |
| Flags of North and South America | 0 | - | 4.99 | 373,164 |
| Latin American Countries Map Quiz | 0 | - | 4.97 | 129,795 |
| South America Map Quiz | 0 | - | 5.00 | 1,549,962 |
| Belize Country Quiz | 0 | - | 4.85 | 20,978 |
| Saint Vincent and the Grenadines Country Quiz | 0 | - | 4.88 | 19,215 |
| Top U.S. Universities | 0 | - | 4.15 | 145,155 |
| Largest United States Airlines | 0 | - | 4.39 | 55,033 |
| Third Most Common Language by U.S. State | 0 | - | 4.87 | 113,738 |
| U.S. States by Governor | 0 | - | 4.43 | 18,063 |
| U.S. Political Parties in History | 0 | - | 4.44 | 27,697 |
| U.S. Government Agencies | 0 | - | 4.44 | 19,681 |
| Florida Pro Sport Teams | 0 | - | 4.61 | 11,844 |
| Boston Talk to English Translation Quiz | 0 | - | 4.59 | 55,974 |
| Canada Immigration by Country | 0 | - | 4.51 | 62,607 |
| Countries of Europe in 1650 with a Map | 0 | - | 4.95 | 69,255 |
| The Only American Country ... | 0 | - | 4.92 | 121,626 |
| American Countries with the Shortest Names | 0 | - | 4.96 | 121,131 |
| Dominica Country Quiz | 0 | - | 4.81 | 19,832 |
| North America Capitals Quiz | 0 | - | 4.99 | 219,846 |
| USA Tourist Attractions by Description #1 | 0 | - | 4.14 | 27,127 |
| Which Island in the United States? | 0 | - | 4.29 | 29,518 |
| American Inventions #1 | 0 | - | 3.63 | 31,503 |
| American Inventions #2 | 0 | - | 3.93 | 15,866 |
| American Foods | 0 | - | 3.66 | 39,383 |
| Biggest U.S. Car Insurance Companies | 0 | - | 4.26 | 6,130 |
| Countries Across the Ocean from the U.S. | 0 | - | 3.95 | 32,257 |
| American Legal Vocabulary | 0 | - | 4.40 | 33,917 |
| U.S. Cities by Picture #1 | 0 | - | 4.36 | 34,564 |
| Cities by Picture #2 | 0 | - | 4.19 | 35,144 |
| U.S. Landmarks Picture Quiz | 0 | - | 4.26 | 14,765 |
| U.S. Groups of Four Quiz | 0 | - | 4.39 | 25,334 |
| U.S. Groups of Three Quiz | 0 | - | 4.04 | 20,901 |
| Branches of the U.S. Military | 0 | - | 4.39 | 24,379 |
| The U.S. Government - How Does it Work? | 0 | - | 4.34 | 42,364 |
| U.S. Presidents by Picture | 0 | - | 4.87 | 426,541 |
| First Names of U.S. Presidents | 0 | - | 4.86 | 381,671 |
| People on Money - United States | 0 | - | 4.31 | 63,348 |
| U.S. History Groups of Two | 0 | - | 4.23 | 44,468 |
| The Life of Thomas Edison | 0 | - | 3.95 | 4,916 |
| Last 10 U.S. States Alphabetically | 0 | - | 4.35 | 74,854 |
| Top 10 Least Populous U.S. State Capitals | 0 | - | 4.52 | 21,524 |
| Flyover States | 0 | - | 4.52 | 29,515 |
| U.S. States With Double Letters | 0 | - | 4.55 | 24,125 |
| U.S. States Bigger than Their Neighbors | 0 | - | 4.27 | 76,169 |
| 50 States, 50 Cities - Easy Version | 0 | - | 4.39 | 128,383 |
| U.S. States with the Most Gun Ownership | 0 | - | 4.45 | 29,700 |
| U.S. States with Oldest Median Age | 0 | - | 4.33 | 42,575 |
| Top 10 U.S. States with the Longest Commutes | 0 | - | 4.28 | 44,406 |
| US States with the Most Executions | 0 | - | 4.51 | 26,397 |
| Top 10 U.S. States with the Most Lighthouses | 0 | - | 4.61 | 29,067 |
| Top 10 Least White U.S. States | 0 | - | 4.17 | 48,014 |
| Top 10 Least Happy U.S. States | 0 | - | 4.54 | 24,151 |
| Countries of Europe in 1815 With a Map | 0 | - | 4.99 | 150,418 |
| Countries of Europe in 1848 | 0 | - | 4.99 | 81,998 |
| Countries of Europe in 1870 with a Map | 0 | - | 4.95 | 64,710 |
| Every Country of Europe Since 1815 With a Map | 0 | - | 4.98 | 71,035 |
| Countries of Europe in 1360 with a Map | 0 | - | 4.99 | 56,905 |
| Caribbean Countries and Territories | 0 | - | 4.80 | 112,817 |
| Name a Valid U.S. President #1 | 0 | - | 4.89 | 191,835 |
| Play-Doh Presidents | 0 | - | 5.00 | 82,310 |
| US States Quiz | 0 | - | 5.00 | 16,878,243 |
| 10 U.S. States with the Most Valuable Crops | 0 | - | 4.41 | 29,574 |
| U.S. States with the Lowest HDI | 0 | - | 4.47 | 28,851 |
| Which U.S. State - Multiple Choice | 0 | - | 4.48 | 20,297 |
| Top 10 U.S. States with the Highest Life Expectancy | 0 | - | 4.33 | 41,672 |
| Top 10 Least-Forested U.S. States | 0 | - | 4.50 | 46,521 |
| Canada Country Quiz | 0 | - | 4.54 | 132,494 |
| Canada Cities Map Quiz | 0 | - | 4.64 | 124,222 |
| Canada A-Z | 0 | - | 4.73 | 32,839 |
| Countries of the Mongol Empire on a Map | 0 | - | 4.99 | 106,878 |
| Top 10 Biggest Economies in the Americas | 0 | - | 4.94 | 92,196 |
| American Countries With No Atlantic Coastline | 0 | - | 4.94 | 92,472 |
| History of Mexico | 0 | - | 4.58 | 15,309 |
| Countries of South America with an Empty Map | 0 | - | 4.94 | 104,930 |
| All First-Level Subdivisions of South America on a Map | 0 | - | 4.92 | 53,934 |
| Brazil States Map Quiz | 0 | - | 4.85 | 48,083 |
| States of Brazil | 0 | - | 4.97 | 88,132 |
| Fictional Characters from the Midwest by Picture | 0 | - | 4.04 | 19,198 |
| U.S. States by Picture #1 | 0 | - | 4.21 | 15,444 |
| All 3,143 Counties of the United States on a Map | 0 | - | 4.97 | 332,092 |
| Most-Visited U.S. Cities | 0 | - | 4.85 | 93,853 |
| Every U.S. Metro Area on a Map | 0 | - | 4.97 | 81,808 |
| Senators Who Ran For President | 0 | - | 4.24 | 17,042 |
