| United States Map Quiz | 0 | - | 4.98 | 4,149,204 |
| U.S. State Border Crossings | 0 | - | 4.97 | 96,229 |
| U.S. Citizenship Test Questions | 0 | - | 4.83 | 238,897 |
| U.S. Cities with the Most International Tourists | 0 | - | 4.88 | 75,196 |
| Cities and Towns of Massachusetts | 0 | - | 4.92 | 73,516 |
| Countries Larger Than Texas but With Fewer People | 0 | - | 4.92 | 39,710 |
| The United States... or the United Kingdom? | 0 | - | 4.87 | 98,164 |
| States of the U.S. in Alphabetical Order | 0 | - | 4.98 | 366,201 |
| Name the U.S. National Parks | 0 | - | 4.86 | 59,605 |
| Total United States Immigration by Country | 0 | - | 4.91 | 111,099 |
| Most Common U.S. Last Names - Extreme | 0 | - | 4.94 | 173,839 |
| "Do Not Travel" Countries for U.S. Citizens | 0 | - | 4.97 | 242,470 |
| U.S. Cabinet Departments | 0 | - | 4.86 | 72,707 |
| Top 10 Non-English Languages Spoken in New York City | 0 | - | 4.85 | 65,936 |
| U.S. History Multiple Choice #3 | 0 | - | 4.43 | 24,691 |
| Pixelated United States Map | 0 | - | 4.89 | 93,857 |
| Most-Visited Countries by Americans | 0 | - | 4.87 | 109,061 |
| Countries that Visit the United States the Most | 0 | - | 4.96 | 91,314 |
| The 13 Colonies Quiz | 0 | - | 4.97 | 117,410 |
| U.S. States with the Letter Y | 0 | - | 4.85 | 110,965 |
| 10 Southernmost U.S. States | 0 | - | 4.88 | 112,968 |
| U.S. States with Short Names | 0 | - | 4.91 | 148,427 |
| U.S. States that Start with M | 0 | - | 4.93 | 186,657 |
| U.S. States By Population | 0 | - | 4.92 | 152,828 |
| U.S. States that Start with N | 0 | - | 4.95 | 170,940 |
| U.S. States with Longest Names | 0 | - | 4.84 | 44,194 |
| 10 Northernmost U.S. States | 0 | - | 4.90 | 82,238 |
| U.S. States with a Unique First Letter | 0 | - | 4.96 | 87,985 |
| 10 Westernmost U.S. States | 0 | - | 4.95 | 64,009 |
| The Only Remaining U.S. State . . . | 0 | - | 4.92 | 65,313 |
| Top 10 Largest U.S. States by Area | 0 | - | 4.95 | 159,582 |
| Top 10 Smallest U.S. States by Area | 0 | - | 4.98 | 177,401 |
| Top 10 Poorest U.S. States by Median Income | 0 | - | 4.86 | 124,903 |
| U.S. States with the Highest Percentage of Hispanics | 0 | - | 4.85 | 69,345 |
| Top 10 Newest U.S. States | 0 | - | 4.85 | 86,006 |
| Top 10 U.S. States Where the Rent is Too Dang High | 0 | - | 4.85 | 67,237 |
| Countries of North America Quiz | 0 | - | 5.00 | 1,017,852 |
| Countries that Beat the United States | 0 | - | 4.93 | 166,210 |
| Embarrassing Chapters in US History | 0 | - | 4.17 | 33,053 |
| Top 10 Most-Visited U.S. States | 0 | - | 4.90 | 101,444 |
| U.S. States with the Most Immigrants | 0 | - | 4.85 | 82,224 |
| Canada Provinces and Territories | 0 | - | 5.00 | 340,104 |
| Canada Provinces Map Quiz | 0 | - | 4.99 | 638,054 |
| Central America and Caribbean Map Quiz | 0 | - | 4.89 | 900,948 |
| Three Real and One Fake - U.S. History | 0 | - | 4.33 | 25,735 |
| U.S. History Multiple Choice #2 | 0 | - | 4.32 | 25,032 |
| U.S. History Multiple Choice #1 | 0 | - | 4.31 | 22,204 |
| U.S. History Multiple Choice #4 | 0 | - | 4.26 | 25,540 |
| U.S. History Multiple Choice #5 | 0 | - | 4.26 | 11,529 |
| North American Capitals - Map Quiz | 0 | - | 4.87 | 57,475 |
| All First-Level Subdivisions of North America on a Map | 0 | - | 4.97 | 63,555 |
| Red State or Blue State Trait? | 0 | - | 4.42 | 55,139 |
| Old West History | 0 | - | 4.33 | 15,244 |
| Life of Benjamin Franklin | 0 | - | 4.24 | 6,510 |
| American Revolution - Multiple Choice | 0 | - | 4.34 | 19,896 |
| Canada True or False? | 0 | - | 4.57 | 54,755 |
| States of Mexico | 0 | - | 4.95 | 174,885 |
| Mexico States Map Quiz | 0 | - | 4.85 | 104,226 |
| Central American Countries | 0 | - | 4.98 | 155,576 |
| Caribbean / Lesser Antilles Map Quiz | 0 | - | 4.99 | 147,008 |
| Territories of the United States | 0 | - | 4.79 | 52,266 |
| Five Biggest Immigrant Groups by Decade in the US | 0 | - | 4.79 | 39,502 |
| Most Mentioned Enemies of the USA | 0 | - | 4.77 | 175,027 |
| Major non-NATO U.S. Allies | 0 | - | 4.52 | 51,973 |
| New York City Geography | 0 | - | 4.42 | 33,030 |
| Events in U.S. History | 0 | - | 4.40 | 28,578 |
| U.S. State Nicknames | 0 | - | 4.47 | 50,407 |
| Countries with American Expatriates | 0 | - | 4.53 | 42,528 |
| United States Landmarks Map Quiz | 0 | - | 4.55 | 40,133 |
| United States Country Quiz | 0 | - | 4.43 | 101,102 |
| Busiest Air Routes from the U.S. | 0 | - | 4.46 | 76,744 |
| The U.S. Government - How Does it Work? | 0 | - | 4.34 | 42,277 |
| U.S. Presidents Quiz | 0 | - | 5.00 | 3,676,629 |
| Deadliest U.S. Wars | 0 | - | 4.89 | 189,879 |
| Valid Answer - U.S. History | 0 | - | 4.24 | 22,494 |
| Most-Visited Countries by Canadians | 0 | - | 4.82 | 39,192 |
| Countries Closest to Canada | 0 | - | 4.90 | 197,773 |
| Asian Countries Americans Travel to the Most | 0 | - | 4.75 | 59,813 |
| Countries Closest to the U. S. | 0 | - | 4.41 | 208,508 |
| American Geography Quiz for Dummies | 0 | - | 4.41 | 68,941 |
| Top 10 Non-English Languages of Los Angeles | 0 | - | 4.42 | 59,755 |
| New England States | 0 | - | 4.51 | 59,761 |
| U.S. States by Land Area | 0 | - | 4.61 | 52,660 |
| Top 10 U.S. States by Inland Water Area | 0 | - | 4.53 | 37,958 |
| Add a Letter - Make a U.S. State | 0 | - | 4.72 | 82,580 |
| Top 10 Widest U.S. States East to West | 0 | - | 4.70 | 55,842 |
| Top 10 Tallest U.S. States North to South | 0 | - | 4.74 | 40,797 |
| U.S. States by Borders | 0 | - | 4.61 | 35,207 |
| Save Americans by Guessing U.S. States | 0 | - | 4.63 | 184,229 |
| Which U.S. State - Multiple Choice | 0 | - | 4.48 | 20,250 |
| 10 Easternmost U.S. States | 0 | - | 4.53 | 56,374 |
| The Only U.S. State ... #1 | 0 | - | 4.52 | 101,848 |
| 50 States, 50 Cities - Hard Version | 0 | - | 4.46 | 44,099 |
| U.S. States with the Most Expensive Home Prices | 0 | - | 4.48 | 99,477 |
| U.S. States with the Cheapest Home Prices | 0 | - | 4.72 | 32,914 |
| Top 10 Most African-American U.S. States | 0 | - | 4.46 | 74,521 |
| Top 10 Most Asian U.S. States | 0 | - | 4.80 | 75,037 |
| Top 10 Most Obese U.S. States | 0 | - | 4.54 | 81,293 |
| Top 10 Least Obese U.S. States | 0 | - | 4.75 | 73,572 |
| Top 10 Least-Educated U.S. States | 0 | - | 4.43 | 90,607 |
| Top 10 Most-Educated U.S. States | 0 | - | 4.48 | 84,607 |
| U.S. States with the Highest Rates of Homelessness | 0 | - | 4.43 | 52,283 |
| Top 10 Most White U.S. States | 0 | - | 4.49 | 82,225 |
| Top 10 Most German U.S. States | 0 | - | 4.48 | 59,816 |
| Slowest Growing U.S. States Since 1960 | 0 | - | 4.43 | 46,467 |
| Ten Most Rectangular U.S. States | 0 | - | 4.54 | 71,148 |
| Countries that Beat Canada | 0 | - | 4.90 | 87,145 |
| U.S. Federal Holidays | 0 | - | 4.33 | 99,381 |
| Recommended Childhood Vaccines for Americans | 0 | - | 4.42 | 14,681 |
| 75 Americans Named John | 0 | - | 4.41 | 23,868 |
| California Multiple Choice | 0 | - | 4.40 | 28,069 |
| Florida Multiple Choice | 0 | - | 4.33 | 10,174 |
| History of Pennsylvania | 0 | - | 4.16 | 7,113 |
| History of Virginia | 0 | - | 4.31 | 11,577 |
| Georgia ... or Georgia? | 0 | - | 4.67 | 76,601 |
| Flags of North and South America | 0 | - | 4.99 | 370,537 |
| South America Map Quiz | 0 | - | 5.00 | 1,545,164 |
| Belize Country Quiz | 0 | - | 4.85 | 20,890 |
| Saint Vincent and the Grenadines Country Quiz | 0 | - | 4.88 | 19,129 |
| Top U.S. Universities | 0 | - | 4.15 | 144,565 |
| Largest United States Airlines | 0 | - | 4.39 | 54,934 |
| U.S. States by Governor | 0 | - | 4.43 | 18,019 |
| U.S. Political Parties in History | 0 | - | 4.44 | 27,629 |
| U.S. Government Agencies | 0 | - | 4.44 | 19,612 |
| U.S. Presidents by Picture | 0 | - | 4.87 | 425,156 |
| Florida Pro Sport Teams | 0 | - | 4.61 | 11,798 |
| Boston Talk to English Translation Quiz | 0 | - | 4.59 | 55,847 |
| North Carolina... or South Carolina? | 0 | - | 4.21 | 10,502 |
| U.S. States with the Highest Percentage of Farmland | 0 | - | 4.80 | 65,378 |
| U.S. States with the Lowest Percentage of Farmland | 0 | - | 4.74 | 55,116 |
| Top 10 U.S. States with the Lowest Life Expectancy | 0 | - | 4.67 | 45,047 |
| Top 10 U.S. States with the Highest Elevation | 0 | - | 4.51 | 67,830 |
| Top 10 U.S. States That Grow the Most Corn | 0 | - | 4.52 | 36,089 |
| Top 10 U.S. States People are Leaving | 0 | - | 4.42 | 59,242 |
| Top 10 U.S. States People are Moving To | 0 | - | 4.73 | 63,720 |
| U.S. States with the Lowest Average Elevation | 0 | - | 4.55 | 38,440 |
| U.S. States With the Highest Average Elevation | 0 | - | 4.61 | 32,709 |
| Ancient Rome - True or False? | 0 | - | 4.85 | 42,769 |
| Latin American Countries Map Quiz | 0 | - | 4.97 | 128,933 |
| Dominica Country Quiz | 0 | - | 4.81 | 19,754 |
| Third Most Common Language by U.S. State | 0 | - | 4.87 | 113,563 |
| American Legal Vocabulary | 0 | - | 4.40 | 33,847 |
| U.S. Cities by Picture #1 | 0 | - | 4.36 | 34,450 |
| Cities by Picture #2 | 0 | - | 4.19 | 35,019 |
| First Names of U.S. Presidents | 0 | - | 4.85 | 380,493 |
| Washington... or Washington D.C.? | 0 | - | 4.33 | 26,487 |
| People on Money - United States | 0 | - | 4.31 | 63,272 |
| U.S. History Groups of Two | 0 | - | 4.23 | 44,349 |
| The Life of Thomas Edison | 0 | - | 3.95 | 4,910 |
| Last 10 U.S. States Alphabetically | 0 | - | 4.35 | 74,728 |
| Top 10 Least Populous U.S. State Capitals | 0 | - | 4.52 | 21,498 |
| Flyover States | 0 | - | 4.52 | 29,453 |
| U.S. States With Double Letters | 0 | - | 4.54 | 24,020 |
| U.S. States Bigger than Their Neighbors | 0 | - | 4.27 | 75,984 |
| 50 States, 50 Cities - Easy Version | 0 | - | 4.39 | 128,175 |
| U.S. States with the Most Gun Ownership | 0 | - | 4.44 | 29,640 |
| U.S. States with Oldest Median Age | 0 | - | 4.33 | 42,474 |
| Top 10 U.S. States with the Longest Commutes | 0 | - | 4.28 | 44,281 |
| US States with the Most Executions | 0 | - | 4.51 | 26,373 |
| Top 10 U.S. States with the Most Lighthouses | 0 | - | 4.61 | 28,994 |
| Top 10 Least-Forested U.S. States | 0 | - | 4.50 | 46,424 |
| Top 10 Least White U.S. States | 0 | - | 4.17 | 47,822 |
| Top 10 Least Happy U.S. States | 0 | - | 4.54 | 24,078 |
| Canada Immigration by Country | 0 | - | 4.51 | 62,413 |
| Countries of Europe in 1650 with a Map | 0 | - | 4.95 | 68,426 |
| The Only American Country ... | 0 | - | 4.92 | 121,207 |
| American Countries with the Shortest Names | 0 | - | 4.96 | 120,761 |
| Caribbean Countries and Territories | 0 | - | 4.80 | 112,569 |
| North America Capitals Quiz | 0 | - | 4.99 | 218,381 |
| USA Tourist Attractions by Description #1 | 0 | - | 4.14 | 27,082 |
| Which Island in the United States? | 0 | - | 4.29 | 29,348 |
| American Inventions #1 | 0 | - | 3.63 | 31,486 |
| American Inventions #2 | 0 | - | 3.93 | 15,848 |
| American Foods | 0 | - | 3.66 | 39,332 |
| Biggest U.S. Car Insurance Companies | 0 | - | 4.26 | 6,121 |
| Countries Across the Ocean from the U.S. | 0 | - | 3.95 | 32,181 |
| U.S. Landmarks Picture Quiz | 0 | - | 4.26 | 14,702 |
| U.S. Groups of Four Quiz | 0 | - | 4.39 | 25,259 |
| U.S. Groups of Three Quiz | 0 | - | 4.04 | 20,848 |
| U.S. Analogies | 0 | - | 4.27 | 19,643 |
| Branches of the U.S. Military | 0 | - | 4.40 | 24,264 |
| Name a Valid U.S. President #1 | 0 | - | 4.89 | 190,807 |
| Play-Doh Presidents | 0 | - | 5.00 | 81,971 |
| US States Quiz | 0 | - | 5.00 | 16,788,166 |
| 10 U.S. States with the Most Valuable Crops | 0 | - | 4.41 | 29,527 |
| 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 | 41,617 |
| Canada Country Quiz | 0 | - | 4.54 | 132,129 |
| Canada Cities Map Quiz | 0 | - | 4.63 | 123,914 |
| Canada A-Z | 0 | - | 4.73 | 32,729 |
| Countries of Europe in 1815 With a Map | 0 | - | 4.99 | 149,596 |
| Countries of Europe in 1848 | 0 | - | 4.98 | 75,906 |
| Countries of Europe in 1870 with a Map | 0 | - | 4.95 | 64,026 |
| Every Country of Europe Since 1815 With a Map | 0 | - | 4.98 | 70,522 |
| Countries of Europe in 1360 with a Map | 0 | - | 4.99 | 56,421 |
| Countries of the Mongol Empire on a Map | 0 | - | 4.99 | 106,374 |
| Biggest Mongol Empire Countries | 0 | - | 4.89 | 81,008 |
| Top 10 American Countries by Coastline | 0 | - | 4.96 | 88,217 |
| Top 10 Richest Countries in the Americas | 0 | - | 4.93 | 82,194 |
| Top 10 Biggest Economies in the Americas | 0 | - | 4.93 | 91,498 |
