| United States Map Quiz | 0 | - | 4.98 | 4,143,723 |
| U.S. History Multiple Choice #3 | 0 | - | 4.43 | 24,654 |
| U.S. State Border Crossings | 0 | - | 4.97 | 96,024 |
| U.S. Citizenship Test Questions | 0 | - | 4.83 | 238,470 |
| U.S. Cities with the Most International Tourists | 0 | - | 4.88 | 74,955 |
| Cities and Towns of Massachusetts | 0 | - | 4.92 | 73,155 |
| Countries Larger Than Texas but With Fewer People | 0 | - | 4.92 | 39,554 |
| The United States... or the United Kingdom? | 0 | - | 4.87 | 97,921 |
| States of the U.S. in Alphabetical Order | 0 | - | 4.98 | 365,477 |
| Name the U.S. National Parks | 0 | - | 4.86 | 59,255 |
| Total United States Immigration by Country | 0 | - | 4.91 | 110,760 |
| Most Common U.S. Last Names - Extreme | 0 | - | 4.94 | 173,341 |
| "Do Not Travel" Countries for U.S. Citizens | 0 | - | 4.97 | 241,273 |
| U.S. Cabinet Departments | 0 | - | 4.86 | 72,564 |
| Top 10 Non-English Languages Spoken in New York City | 0 | - | 4.84 | 65,708 |
| Pixelated United States Map | 0 | - | 4.89 | 93,587 |
| Most-Visited Countries by Americans | 0 | - | 4.87 | 108,623 |
| Countries that Visit the United States the Most | 0 | - | 4.96 | 90,954 |
| U.S. History Multiple Choice #1 | 0 | - | 4.31 | 22,169 |
| U.S. History Multiple Choice #4 | 0 | - | 4.26 | 25,499 |
| The 13 Colonies Quiz | 0 | - | 4.97 | 116,867 |
| U.S. States with the Letter Y | 0 | - | 4.85 | 110,488 |
| 10 Southernmost U.S. States | 0 | - | 4.88 | 112,532 |
| U.S. States with Short Names | 0 | - | 4.91 | 147,821 |
| U.S. States that Start with M | 0 | - | 4.93 | 186,077 |
| U.S. States By Population | 0 | - | 4.92 | 152,478 |
| U.S. States that Start with N | 0 | - | 4.95 | 170,527 |
| U.S. States with Longest Names | 0 | - | 4.84 | 43,947 |
| 10 Northernmost U.S. States | 0 | - | 4.90 | 81,953 |
| U.S. States with a Unique First Letter | 0 | - | 4.96 | 87,650 |
| 10 Westernmost U.S. States | 0 | - | 4.95 | 63,804 |
| The Only Remaining U.S. State . . . | 0 | - | 4.92 | 64,964 |
| Top 10 Largest U.S. States by Area | 0 | - | 4.95 | 158,993 |
| Top 10 Smallest U.S. States by Area | 0 | - | 4.98 | 177,139 |
| Top 10 Poorest U.S. States by Median Income | 0 | - | 4.86 | 124,564 |
| U.S. States with the Highest Percentage of Hispanics | 0 | - | 4.85 | 69,109 |
| Top 10 Newest U.S. States | 0 | - | 4.85 | 85,717 |
| Top 10 U.S. States Where the Rent is Too Dang High | 0 | - | 4.84 | 66,898 |
| U.S. History Multiple Choice #5 | 0 | - | 4.26 | 11,493 |
| Countries of North America Quiz | 0 | - | 5.00 | 1,013,291 |
| Countries that Beat the United States | 0 | - | 4.93 | 165,718 |
| Embarrassing Chapters in US History | 0 | - | 4.17 | 33,012 |
| Top 10 Most-Visited U.S. States | 0 | - | 4.90 | 101,168 |
| U.S. States with the Most Immigrants | 0 | - | 4.85 | 81,997 |
| Canada Provinces and Territories | 0 | - | 5.00 | 338,482 |
| Canada Provinces Map Quiz | 0 | - | 4.99 | 636,492 |
| Central America and Caribbean Map Quiz | 0 | - | 4.89 | 900,051 |
| Three Real and One Fake - U.S. History | 0 | - | 4.33 | 25,698 |
| North American Capitals - Map Quiz | 0 | - | 4.87 | 57,103 |
| All First-Level Subdivisions of North America on a Map | 0 | - | 4.97 | 63,131 |
| Red State or Blue State Trait? | 0 | - | 4.42 | 55,012 |
| Old West History | 0 | - | 4.33 | 15,231 |
| Life of Benjamin Franklin | 0 | - | 4.24 | 6,496 |
| American Revolution - Multiple Choice | 0 | - | 4.34 | 19,859 |
| States of Mexico | 0 | - | 4.95 | 173,684 |
| Mexico States Map Quiz | 0 | - | 4.84 | 103,936 |
| Central American Countries | 0 | - | 4.98 | 155,179 |
| Caribbean / Lesser Antilles Map Quiz | 0 | - | 4.99 | 146,169 |
| Territories of the United States | 0 | - | 4.79 | 52,179 |
| Five Biggest Immigrant Groups by Decade in the US | 0 | - | 4.78 | 39,416 |
| Most Mentioned Enemies of the USA | 0 | - | 4.77 | 174,674 |
| Major non-NATO U.S. Allies | 0 | - | 4.52 | 51,806 |
| New York City Geography | 0 | - | 4.42 | 32,962 |
| Events in U.S. History | 0 | - | 4.40 | 28,505 |
| U.S. State Nicknames Quiz | 0 | - | 4.47 | 50,313 |
| Countries with American Expatriates | 0 | - | 4.53 | 42,487 |
| United States Landmarks Map Quiz | 0 | - | 4.55 | 40,093 |
| United States Country Quiz | 0 | - | 4.43 | 100,725 |
| Busiest Air Routes from the U.S. | 0 | - | 4.46 | 76,645 |
| The U.S. Government - How Does it Work? | 0 | - | 4.34 | 42,196 |
| U.S. Presidents Quiz | 0 | - | 5.00 | 3,660,144 |
| Deadliest U.S. Wars | 0 | - | 4.89 | 189,408 |
| Valid Answer - U.S. History | 0 | - | 4.24 | 22,459 |
| Countries Closest to Canada | 0 | - | 4.90 | 197,465 |
| Asian Countries Americans Travel to the Most | 0 | - | 4.75 | 59,686 |
| Countries Closest to the U. S. | 0 | - | 4.41 | 208,029 |
| American Geography Quiz for Dummies | 0 | - | 4.41 | 68,778 |
| Top 10 Non-English Languages of Los Angeles | 0 | - | 4.42 | 59,630 |
| New England States | 0 | - | 4.51 | 59,715 |
| U.S. States by Land Area | 0 | - | 4.61 | 52,528 |
| Top 10 U.S. States by Inland Water Area | 0 | - | 4.53 | 37,897 |
| Add a Letter - Make a U.S. State | 0 | - | 4.72 | 82,380 |
| Top 10 Widest U.S. States East to West | 0 | - | 4.69 | 55,691 |
| Top 10 Tallest U.S. States North to South | 0 | - | 4.74 | 40,690 |
| U.S. States by Borders | 0 | - | 4.63 | 35,107 |
| Save Americans by Guessing U.S. States | 0 | - | 4.61 | 182,974 |
| Which U.S. State - Multiple Choice | 0 | - | 4.48 | 20,213 |
| 10 Easternmost U.S. States | 0 | - | 4.53 | 56,267 |
| The Only U.S. State ... #1 | 0 | - | 4.52 | 101,176 |
| 50 States, 50 Cities - Hard Version | 0 | - | 4.46 | 44,016 |
| U.S. States with the Most Expensive Home Prices | 0 | - | 4.48 | 99,355 |
| U.S. States with the Cheapest Home Prices | 0 | - | 4.70 | 32,823 |
| Top 10 Most African-American U.S. States | 0 | - | 4.46 | 74,439 |
| Top 10 Most Asian U.S. States | 0 | - | 4.80 | 74,920 |
| Top 10 Most Obese U.S. States | 0 | - | 4.54 | 81,228 |
| Top 10 Least Obese U.S. States | 0 | - | 4.75 | 73,448 |
| Top 10 Least-Educated U.S. States | 0 | - | 4.43 | 90,352 |
| Top 10 Most-Educated U.S. States | 0 | - | 4.48 | 84,420 |
| U.S. States with the Highest Rates of Homelessness | 0 | - | 4.43 | 52,176 |
| Top 10 Most White U.S. States | 0 | - | 4.49 | 81,949 |
| Top 10 Most German U.S. States | 0 | - | 4.48 | 59,632 |
| Ten Most Rectangular U.S. States | 0 | - | 4.54 | 70,977 |
| Countries that Beat Canada | 0 | - | 4.90 | 86,936 |
| U.S. Federal Holidays | 0 | - | 4.33 | 99,126 |
| Recommended Childhood Vaccines for Americans | 0 | - | 4.42 | 14,646 |
| 75 Americans Named John | 0 | - | 4.41 | 23,832 |
| California Multiple Choice | 0 | - | 4.40 | 28,047 |
| Florida Multiple Choice | 0 | - | 4.33 | 10,167 |
| History of Pennsylvania | 0 | - | 4.16 | 7,093 |
| History of Virginia | 0 | - | 4.31 | 11,560 |
| Georgia ... or Georgia? | 0 | - | 4.69 | 76,466 |
| Flags of North and South America | 0 | - | 4.99 | 368,165 |
| South America Map Quiz | 0 | - | 5.00 | 1,542,062 |
| Belize Country Quiz | 0 | - | 4.85 | 20,827 |
| Saint Vincent and the Grenadines Country Quiz | 0 | - | 4.88 | 19,074 |
| Top U.S. Universities | 0 | - | 4.15 | 144,215 |
| Largest United States Airlines | 0 | - | 4.39 | 54,860 |
| U.S. States by Governor | 0 | - | 4.43 | 17,992 |
| U.S. Political Parties in History | 0 | - | 4.44 | 27,589 |
| U.S. Government Agencies | 0 | - | 4.44 | 19,562 |
| U.S. Presidents by Picture | 0 | - | 4.87 | 424,117 |
| Florida Pro Sport Teams | 0 | - | 4.61 | 11,768 |
| Boston Talk to English Translation Quiz | 0 | - | 4.59 | 55,727 |
| North Carolina... or South Carolina? | 0 | - | 4.21 | 10,489 |
| U.S. States with the Highest Percentage of Farmland | 0 | - | 4.80 | 65,304 |
| U.S. States with the Lowest Percentage of Farmland | 0 | - | 4.74 | 55,050 |
| Top 10 U.S. States with the Lowest Life Expectancy | 0 | - | 4.67 | 44,980 |
| Top 10 U.S. States with the Highest Elevation | 0 | - | 4.51 | 67,785 |
| Top 10 U.S. States That Grow the Most Corn | 0 | - | 4.52 | 36,033 |
| Top 10 U.S. States People are Leaving | 0 | - | 4.42 | 59,072 |
| Top 10 U.S. States People are Moving To | 0 | - | 4.73 | 63,588 |
| U.S. States with the Lowest Average Elevation | 0 | - | 4.55 | 38,405 |
| U.S. States With the Highest Average Elevation | 0 | - | 4.61 | 32,681 |
| Latin American Countries Map Quiz | 0 | - | 4.97 | 128,376 |
| Dominica Country Quiz | 0 | - | 4.81 | 19,696 |
| Third Most Common Language by U.S. State | 0 | - | 4.87 | 113,418 |
| American Legal Vocabulary | 0 | - | 4.40 | 33,803 |
| U.S. Cities by Picture #1 | 0 | - | 4.37 | 34,378 |
| Cities by Picture #2 | 0 | - | 4.19 | 34,959 |
| First Names of U.S. Presidents | 0 | - | 4.85 | 379,810 |
| Washington... or Washington D.C.? | 0 | - | 4.33 | 26,471 |
| People on Money - United States | 0 | - | 4.31 | 63,224 |
| U.S. History Groups of Two | 0 | - | 4.23 | 44,272 |
| The Life of Thomas Edison | 0 | - | 3.95 | 4,900 |
| Last 10 U.S. States Alphabetically | 0 | - | 4.35 | 74,639 |
| Top 10 Least Populous U.S. State Capitals | 0 | - | 4.52 | 21,470 |
| Flyover States | 0 | - | 4.52 | 29,414 |
| U.S. States With Double Letters | 0 | - | 4.54 | 23,951 |
| U.S. States Bigger than Their Neighbors | 0 | - | 4.27 | 75,863 |
| 50 States, 50 Cities - Easy Version | 0 | - | 4.39 | 128,030 |
| U.S. States with the Most Gun Ownership | 0 | - | 4.44 | 29,593 |
| U.S. States with Oldest Median Age | 0 | - | 4.33 | 42,395 |
| Top 10 U.S. States with the Longest Commutes | 0 | - | 4.28 | 44,185 |
| US States with the Most Executions | 0 | - | 4.51 | 26,354 |
| Top 10 U.S. States with the Most Lighthouses | 0 | - | 4.61 | 28,940 |
| Top 10 Least-Forested U.S. States | 0 | - | 4.50 | 46,349 |
| Top 10 Least White U.S. States | 0 | - | 4.17 | 47,667 |
| Slowest Growing U.S. States Since 1960 | 0 | - | 4.40 | 40,081 |
| Top 10 Least Happy U.S. States | 0 | - | 4.54 | 24,044 |
| Canada Immigration by Country | 0 | - | 4.51 | 62,268 |
| Countries of Europe in 1650 with a Map | 0 | - | 4.95 | 67,784 |
| The Only American Country ... | 0 | - | 4.92 | 120,862 |
| American Countries with the Shortest Names | 0 | - | 4.96 | 120,426 |
| Caribbean Countries and Territories | 0 | - | 4.80 | 112,376 |
| North America Capitals Quiz | 0 | - | 4.99 | 217,268 |
| USA Tourist Attractions by Description #1 | 0 | - | 4.14 | 27,046 |
| Which Island in the United States? | 0 | - | 4.29 | 29,202 |
| American Inventions #1 | 0 | - | 3.63 | 31,468 |
| American Inventions #2 | 0 | - | 3.93 | 15,835 |
| American Foods | 0 | - | 3.66 | 39,292 |
| Biggest U.S. Car Insurance Companies | 0 | - | 4.26 | 6,111 |
| Countries Across the Ocean from the U.S. | 0 | - | 3.94 | 31,971 |
| U.S. Landmarks Picture Quiz | 0 | - | 4.26 | 14,672 |
| U.S. Groups of Four Quiz | 0 | - | 4.39 | 25,212 |
| U.S. Groups of Three Quiz | 0 | - | 4.04 | 20,813 |
| U.S. Analogies | 0 | - | 4.27 | 19,617 |
| Branches of the U.S. Military | 0 | - | 4.40 | 24,183 |
| Name a Valid U.S. President #1 | 0 | - | 4.89 | 190,105 |
| Play-Doh Presidents | 0 | - | 5.00 | 81,752 |
| US States Quiz | 0 | - | 5.00 | 16,722,954 |
| 10 U.S. States with the Most Valuable Crops | 0 | - | 4.41 | 29,501 |
| U.S. States with the Lowest HDI | 0 | - | 4.46 | 28,778 |
| Top 10 U.S. States with the Highest Life Expectancy | 0 | - | 4.33 | 41,589 |
| Canada Country Quiz | 0 | - | 4.55 | 131,831 |
| Canada Cities Map Quiz | 0 | - | 4.63 | 123,692 |
| Canada A-Z | 0 | - | 4.73 | 32,673 |
| Countries of Europe in 1815 With a Map | 0 | - | 4.99 | 149,089 |
| Countries of Europe in 1848 | 0 | - | 4.98 | 75,546 |
| Countries of Europe in 1870 with a Map | 0 | - | 4.95 | 63,576 |
| Every Country of Europe Since 1815 With a Map | 0 | - | 4.98 | 70,223 |
| Countries of Europe in 1360 with a Map | 0 | - | 4.99 | 56,128 |
| Countries of the Mongol Empire on a Map | 0 | - | 4.99 | 106,026 |
| Biggest Mongol Empire Countries | 0 | - | 4.89 | 80,759 |
| Top 10 American Countries by Coastline | 0 | - | 4.96 | 88,105 |
| Top 10 Richest Countries in the Americas | 0 | - | 4.90 | 76,160 |
| Top 10 Biggest Economies in the Americas | 0 | - | 4.93 | 91,162 |
| American Countries With No Atlantic Coastline | 0 | - | 4.94 | 91,976 |
| History of Mexico | 0 | - | 4.58 | 15,239 |
| Countries of South America with an Empty Map | 0 | - | 4.94 | 104,260 |
| All First-Level Subdivisions of South America on a Map | 0 | - | 4.92 | 53,096 |
