| United States Map Quiz | 0 | - | 4.98 | 4,163,493 |
| U.S. State Border Crossings | 0 | - | 4.97 | 96,606 |
| U.S. Citizenship Test Questions | 0 | - | 4.83 | 239,748 |
| U.S. Cities with the Most International Tourists | 0 | - | 4.88 | 75,612 |
| Cities and Towns of Massachusetts | 0 | - | 4.92 | 74,404 |
| Countries Larger Than Texas but With Fewer People | 0 | - | 4.92 | 40,027 |
| Name the U.S. National Parks | 0 | - | 4.86 | 60,106 |
| Total United States Immigration by Country | 0 | - | 4.91 | 111,869 |
| Most Common U.S. Last Names - Extreme | 0 | - | 4.94 | 174,828 |
| "Do Not Travel" Countries for U.S. Citizens | 0 | - | 4.97 | 244,814 |
| U.S. Cabinet Departments | 0 | - | 4.86 | 72,935 |
| Top 10 Non-English Languages Spoken in New York City | 0 | - | 4.85 | 66,393 |
| States of the U.S. in Alphabetical Order | 0 | - | 4.98 | 367,797 |
| Pixelated United States Map | 0 | - | 4.88 | 94,469 |
| Most-Visited Countries by Americans | 0 | - | 4.86 | 109,937 |
| Countries that Visit the United States the Most | 0 | - | 4.96 | 91,989 |
| The 13 Colonies Quiz | 0 | - | 4.97 | 118,133 |
| U.S. States with the Letter Y | 0 | - | 4.85 | 111,710 |
| 10 Southernmost U.S. States | 0 | - | 4.89 | 113,668 |
| U.S. States with Short Names | 0 | - | 4.91 | 149,330 |
| U.S. States that Start with M | 0 | - | 4.93 | 187,643 |
| U.S. States By Population | 0 | - | 4.92 | 153,734 |
| U.S. States that Start with N | 0 | - | 4.95 | 171,707 |
| U.S. States with Longest Names | 0 | - | 4.84 | 44,595 |
| 10 Northernmost U.S. States | 0 | - | 4.90 | 82,703 |
| U.S. States with a Unique First Letter | 0 | - | 4.96 | 88,498 |
| 10 Westernmost U.S. States | 0 | - | 4.95 | 64,331 |
| The Only Remaining U.S. State . . . | 0 | - | 4.93 | 65,789 |
| Top 10 Largest U.S. States by Area | 0 | - | 4.95 | 160,285 |
| Top 10 Smallest U.S. States by Area | 0 | - | 4.98 | 177,950 |
| Top 10 Poorest U.S. States by Median Income | 0 | - | 4.86 | 125,411 |
| U.S. States with the Highest Percentage of Hispanics | 0 | - | 4.85 | 69,662 |
| Top 10 Newest U.S. States | 0 | - | 4.85 | 86,445 |
| Top 10 U.S. States Where the Rent is Too Dang High | 0 | - | 4.85 | 67,714 |
| Countries of North America Quiz | 0 | - | 5.00 | 1,025,772 |
| Events in U.S. History | 0 | - | 4.41 | 28,707 |
| Embarrassing Chapters in US History | 0 | - | 4.17 | 33,132 |
| Canada Provinces and Territories | 0 | - | 5.00 | 343,623 |
| Canada Provinces Map Quiz | 0 | - | 4.99 | 641,680 |
| Countries that Beat the United States | 0 | - | 4.93 | 167,814 |
| Top 10 Most-Visited U.S. States | 0 | - | 4.90 | 101,937 |
| U.S. States with the Most Immigrants | 0 | - | 4.85 | 82,605 |
| The United States... or the United Kingdom? | 0 | - | 4.87 | 98,729 |
| U.S. History Multiple Choice #3 | 0 | - | 4.43 | 24,749 |
| Central America and Caribbean Map Quiz | 0 | - | 4.89 | 902,925 |
| North American Capitals - Map Quiz | 0 | - | 4.88 | 58,179 |
| All First-Level Subdivisions of North America on a Map | 0 | - | 4.97 | 64,399 |
| Old West History | 0 | - | 4.34 | 15,285 |
| Life of Benjamin Franklin | 0 | - | 4.24 | 6,527 |
| American Revolution - Multiple Choice | 0 | - | 4.34 | 19,951 |
| States of Mexico | 0 | - | 4.96 | 176,759 |
| Mexico States Map Quiz | 0 | - | 4.84 | 105,065 |
| Central American Countries | 0 | - | 4.98 | 156,763 |
| Caribbean Countries and Territories | 0 | - | 4.81 | 112,955 |
| Caribbean / Lesser Antilles Map Quiz | 0 | - | 4.99 | 149,046 |
| Territories of the United States | 0 | - | 4.80 | 52,465 |
| Five Biggest Immigrant Groups by Decade in the US | 0 | - | 4.79 | 39,738 |
| Most Mentioned Enemies of the USA | 0 | - | 4.77 | 175,682 |
| Major non-NATO U.S. Allies | 0 | - | 4.52 | 52,289 |
| New York City Geography | 0 | - | 4.42 | 33,126 |
| U.S. State Nicknames | 0 | - | 4.47 | 50,591 |
| Countries with American Expatriates | 0 | - | 4.53 | 42,615 |
| United States Landmarks Map Quiz | 0 | - | 4.55 | 40,215 |
| United States Country Quiz | 0 | - | 4.43 | 101,716 |
| Busiest Air Routes from the U.S. | 0 | - | 4.46 | 76,954 |
| Asian Countries Americans Travel to the Most | 0 | - | 4.75 | 60,058 |
| Three Real and One Fake - U.S. History | 0 | - | 4.33 | 25,793 |
| U.S. Presidents Quiz | 0 | - | 5.00 | 3,708,133 |
| Deadliest U.S. Wars | 0 | - | 4.89 | 191,066 |
| U.S. History Multiple Choice #2 | 0 | - | 4.32 | 25,088 |
| U.S. History Multiple Choice #1 | 0 | - | 4.31 | 22,261 |
| Valid Answer - U.S. History | 0 | - | 4.24 | 22,554 |
| U.S. History Multiple Choice #4 | 0 | - | 4.24 | 25,616 |
| Most-Visited Countries by Canadians | 0 | - | 4.82 | 39,446 |
| Countries Closest to Canada | 0 | - | 4.91 | 198,595 |
| U.S. History Multiple Choice #5 | 0 | - | 4.26 | 11,569 |
| U.S. Federal Holidays | 0 | - | 4.33 | 99,519 |
| Recommended Childhood Vaccines for Americans | 0 | - | 4.42 | 14,736 |
| Countries Closest to the U. S. | 0 | - | 4.41 | 209,822 |
| American Geography Quiz for Dummies | 0 | - | 4.41 | 69,248 |
| 75 Americans Named John | 0 | - | 4.41 | 23,929 |
| Top 10 Non-English Languages of Los Angeles | 0 | - | 4.43 | 59,956 |
| New England States | 0 | - | 4.51 | 59,834 |
| U.S. States by Land Area | 0 | - | 4.61 | 52,893 |
| Top 10 U.S. States by Inland Water Area | 0 | - | 4.53 | 38,037 |
| Add a Letter - Make a U.S. State | 0 | - | 4.70 | 82,913 |
| Top 10 Widest U.S. States East to West | 0 | - | 4.70 | 56,114 |
| Top 10 Tallest U.S. States North to South | 0 | - | 4.74 | 41,004 |
| U.S. States by Borders | 0 | - | 4.61 | 35,376 |
| Save Americans by Guessing U.S. States | 0 | - | 4.63 | 186,446 |
| 10 Easternmost U.S. States | 0 | - | 4.53 | 56,542 |
| The Only U.S. State ... #1 | 0 | - | 4.52 | 102,143 |
| 50 States, 50 Cities - Hard Version | 0 | - | 4.46 | 44,273 |
| U.S. States with the Most Expensive Home Prices | 0 | - | 4.48 | 99,743 |
| U.S. States with the Cheapest Home Prices | 0 | - | 4.74 | 33,104 |
| Top 10 Most African-American U.S. States | 0 | - | 4.46 | 74,749 |
| Top 10 Most Asian U.S. States | 0 | - | 4.80 | 75,288 |
| Top 10 Most Obese U.S. States | 0 | - | 4.54 | 81,423 |
| Top 10 Least Obese U.S. States | 0 | - | 4.75 | 73,751 |
| Top 10 Least-Educated U.S. States | 0 | - | 4.43 | 91,064 |
| Top 10 Most-Educated U.S. States | 0 | - | 4.48 | 85,014 |
| U.S. States with the Highest Rates of Homelessness | 0 | - | 4.43 | 52,471 |
| Top 10 Most White U.S. States | 0 | - | 4.49 | 82,742 |
| Top 10 Most German U.S. States | 0 | - | 4.48 | 60,073 |
| Slowest Growing U.S. States Since 1960 | 0 | - | 4.43 | 46,970 |
| Countries that Beat Canada | 0 | - | 4.91 | 98,486 |
| Red State or Blue State Trait? | 0 | - | 4.42 | 55,469 |
| History of Pennsylvania | 0 | - | 4.16 | 7,146 |
| History of Virginia | 0 | - | 4.31 | 11,614 |
| U.S. States with the Highest Percentage of Farmland | 0 | - | 4.80 | 65,535 |
| U.S. States with the Lowest Percentage of Farmland | 0 | - | 4.74 | 55,242 |
| Top 10 U.S. States with the Lowest Life Expectancy | 0 | - | 4.61 | 45,178 |
| Top 10 U.S. States with the Highest Elevation | 0 | - | 4.51 | 67,909 |
| Top 10 U.S. States That Grow the Most Corn | 0 | - | 4.52 | 36,197 |
| Top 10 U.S. States People are Leaving | 0 | - | 4.42 | 59,547 |
| Top 10 U.S. States People are Moving To | 0 | - | 4.74 | 63,925 |
| U.S. States with the Lowest Average Elevation | 0 | - | 4.55 | 38,526 |
| U.S. States With the Highest Average Elevation | 0 | - | 4.61 | 32,793 |
| Georgia ... or Georgia? | 0 | - | 4.67 | 76,870 |
| Flags of North and South America | 0 | - | 4.99 | 374,278 |
| Latin American Countries Map Quiz | 0 | - | 4.97 | 130,104 |
| South America Map Quiz | 0 | - | 5.00 | 1,551,716 |
| Belize Country Quiz | 0 | - | 4.85 | 21,012 |
| Saint Vincent and the Grenadines Country Quiz | 0 | - | 4.88 | 19,244 |
| Top U.S. Universities | 0 | - | 4.15 | 145,374 |
| Largest United States Airlines | 0 | - | 4.39 | 55,074 |
| Third Most Common Language by U.S. State | 0 | - | 4.87 | 113,805 |
| U.S. States by Governor | 0 | - | 4.43 | 18,079 |
| U.S. Political Parties in History | 0 | - | 4.44 | 27,716 |
| U.S. Government Agencies | 0 | - | 4.44 | 19,710 |
| Florida Pro Sport Teams | 0 | - | 4.61 | 11,865 |
| Boston Talk to English Translation Quiz | 0 | - | 4.59 | 56,022 |
| Canada Immigration by Country | 0 | - | 4.51 | 62,707 |
| Countries of Europe in 1650 with a Map | 0 | - | 4.95 | 69,625 |
| The Only American Country ... | 0 | - | 4.92 | 121,815 |
| American Countries with the Shortest Names | 0 | - | 4.96 | 121,273 |
| Dominica Country Quiz | 0 | - | 4.81 | 19,863 |
| North America Capitals Quiz | 0 | - | 4.99 | 220,572 |
| USA Tourist Attractions by Description #1 | 0 | - | 4.14 | 27,151 |
| Which Island in the United States? | 0 | - | 4.29 | 29,601 |
| American Inventions #1 | 0 | - | 3.63 | 31,513 |
| American Inventions #2 | 0 | - | 3.93 | 15,873 |
| American Foods | 0 | - | 3.66 | 39,401 |
| Biggest U.S. Car Insurance Companies | 0 | - | 4.26 | 6,133 |
| Countries Across the Ocean from the U.S. | 0 | - | 3.95 | 32,288 |
| American Legal Vocabulary | 0 | - | 4.40 | 33,957 |
| U.S. Cities by Picture #1 | 0 | - | 4.36 | 34,613 |
| Cities by Picture #2 | 0 | - | 4.19 | 35,182 |
| U.S. Landmarks Picture Quiz | 0 | - | 4.26 | 14,777 |
| U.S. Groups of Four Quiz | 0 | - | 4.39 | 25,363 |
| U.S. Groups of Three Quiz | 0 | - | 4.04 | 20,921 |
| Branches of the U.S. Military | 0 | - | 4.39 | 24,415 |
| The U.S. Government - How Does it Work? | 0 | - | 4.34 | 42,399 |
| U.S. Presidents by Picture | 0 | - | 4.87 | 427,024 |
| First Names of U.S. Presidents | 0 | - | 4.86 | 382,302 |
| People on Money - United States | 0 | - | 4.31 | 63,373 |
| U.S. History Groups of Two | 0 | - | 4.23 | 44,504 |
| The Life of Thomas Edison | 0 | - | 3.95 | 4,918 |
| Last 10 U.S. States Alphabetically | 0 | - | 4.35 | 74,918 |
| Top 10 Least Populous U.S. State Capitals | 0 | - | 4.52 | 21,539 |
| Flyover States | 0 | - | 4.52 | 29,538 |
| U.S. States With Double Letters | 0 | - | 4.55 | 24,170 |
| U.S. States Bigger than Their Neighbors | 0 | - | 4.28 | 76,255 |
| 50 States, 50 Cities - Easy Version | 0 | - | 4.39 | 128,483 |
| U.S. States with the Most Gun Ownership | 0 | - | 4.45 | 29,732 |
| U.S. States with Oldest Median Age | 0 | - | 4.33 | 42,616 |
| Top 10 U.S. States with the Longest Commutes | 0 | - | 4.28 | 44,447 |
| US States with the Most Executions | 0 | - | 4.51 | 26,405 |
| Top 10 U.S. States with the Most Lighthouses | 0 | - | 4.61 | 29,102 |
| Top 10 Least White U.S. States | 0 | - | 4.17 | 48,090 |
| Top 10 Least Happy U.S. States | 0 | - | 4.54 | 24,177 |
| Countries of Europe in 1815 With a Map | 0 | - | 4.99 | 150,743 |
| Countries of Europe in 1848 | 0 | - | 4.98 | 83,383 |
| Countries of Europe in 1870 with a Map | 0 | - | 4.95 | 65,096 |
| Every Country of Europe Since 1815 With a Map | 0 | - | 4.98 | 71,312 |
| Countries of Europe in 1360 with a Map | 0 | - | 4.99 | 57,133 |
| Name a Valid U.S. President #1 | 0 | - | 4.89 | 192,588 |
| Play-Doh Presidents | 0 | - | 5.00 | 82,466 |
| US States Quiz | 0 | - | 5.00 | 16,917,215 |
| 10 U.S. States with the Most Valuable Crops | 0 | - | 4.41 | 29,598 |
| U.S. States with the Lowest HDI | 0 | - | 4.47 | 28,875 |
| Which U.S. State - Multiple Choice | 0 | - | 4.48 | 20,321 |
| Top 10 U.S. States with the Highest Life Expectancy | 0 | - | 4.33 | 41,680 |
| Top 10 Least-Forested U.S. States | 0 | - | 4.50 | 46,569 |
| Canada Country Quiz | 0 | - | 4.54 | 132,663 |
| Canada Cities Map Quiz | 0 | - | 4.64 | 124,351 |
| Canada A-Z | 0 | - | 4.73 | 32,888 |
| Countries of the Mongol Empire on a Map | 0 | - | 4.99 | 107,076 |
| Top 10 Biggest Economies in the Americas | 0 | - | 4.94 | 92,380 |
| American Countries With No Atlantic Coastline | 0 | - | 4.94 | 92,572 |
| History of Mexico | 0 | - | 4.58 | 15,334 |
| Countries of South America with an Empty Map | 0 | - | 4.94 | 105,092 |
| All First-Level Subdivisions of South America on a Map | 0 | - | 4.92 | 54,171 |
| Brazil States Map Quiz | 0 | - | 4.86 | 48,237 |
| States of Brazil | 0 | - | 4.97 | 88,580 |
| Fictional Characters from the Midwest by Picture | 0 | - | 4.04 | 19,208 |
| U.S. States by Picture #1 | 0 | - | 4.21 | 15,466 |
| All 3,143 Counties of the United States on a Map | 0 | - | 4.97 | 333,093 |
| Most-Visited U.S. Cities | 0 | - | 4.85 | 94,196 |
| Every U.S. Metro Area on a Map | 0 | - | 4.97 | 82,015 |
