| Deadliest U.S. Wars | 0 | - | 4.89 | 189,835 |
| US States Quiz | 0 | - | 5.00 | 16,785,514 |
| States of the U.S. in Alphabetical Order | 0 | - | 4.98 | 366,175 |
| Name the U.S. National Parks | 0 | - | 4.86 | 59,597 |
| Total United States Immigration by Country | 0 | - | 4.91 | 111,082 |
| Most Common U.S. Last Names - Extreme | 0 | - | 4.94 | 173,794 |
| "Do Not Travel" Countries for U.S. Citizens | 0 | - | 4.97 | 242,408 |
| U.S. Cabinet Departments | 0 | - | 4.86 | 72,697 |
| Top 10 Non-English Languages Spoken in New York City | 0 | - | 4.85 | 65,926 |
| United States Map Quiz | 0 | - | 4.98 | 4,149,000 |
| All 3,143 Counties of the United States on a Map | 0 | - | 4.97 | 329,927 |
| Pixelated United States Map | 0 | - | 4.89 | 93,846 |
| Most-Visited Countries by Americans | 0 | - | 4.87 | 109,043 |
| Countries that Visit the United States the Most | 0 | - | 4.96 | 91,283 |
| The 13 Colonies Quiz | 0 | - | 4.97 | 117,400 |
| U.S. States with the Letter Y | 0 | - | 4.85 | 110,954 |
| 10 Southernmost U.S. States | 0 | - | 4.88 | 112,956 |
| U.S. States with Short Names | 0 | - | 4.91 | 148,409 |
| U.S. States that Start with M | 0 | - | 4.93 | 186,635 |
| U.S. States By Population | 0 | - | 4.92 | 152,813 |
| U.S. States that Start with N | 0 | - | 4.95 | 170,928 |
| U.S. States with Longest Names | 0 | - | 4.84 | 44,189 |
| U.S. States with a Unique First Letter | 0 | - | 4.96 | 87,979 |
| 10 Westernmost U.S. States | 0 | - | 4.95 | 63,998 |
| The Only Remaining U.S. State . . . | 0 | - | 4.92 | 65,291 |
| 10 Longest Rivers in the United States | 0 | - | 4.85 | 38,957 |
| Countries Closest to United States by Continent | 0 | - | 4.99 | 145,858 |
| Countries that Beat the United States | 0 | - | 4.93 | 166,190 |
| Louisiana Purchase with a Map | 0 | - | 4.96 | 48,122 |
| US States with an Empty Map | 0 | - | 5.00 | 621,544 |
| Top 10 Most-Visited U.S. States | 0 | - | 4.90 | 101,436 |
| U.S. States with the Most Immigrants | 0 | - | 4.85 | 82,213 |
| U.S. States or European Countries by Area | 0 | - | 4.95 | 95,388 |
| U.S. States or European Countries by Population | 0 | - | 4.97 | 132,551 |
| People on Money - United States | 0 | - | 4.31 | 63,270 |
| U.S. History Groups of Two | 0 | - | 4.23 | 44,343 |
| Name a Valid U.S. State #1 | 0 | - | 4.93 | 207,847 |
| Top 10 Coldest U.S. States | 0 | - | 4.94 | 124,240 |
| Top 10 Hottest U.S. States | 0 | - | 4.86 | 125,102 |
| Top 10 Most Native American U.S. States | 0 | - | 4.87 | 91,552 |
| Top 10 U.S. States with the Least Precipitation | 0 | - | 4.82 | 61,704 |
| U.S. State Border Crossings | 0 | - | 4.97 | 96,222 |
| U.S. Citizenship Test Questions | 0 | - | 4.83 | 238,881 |
| U.S. Cities with the Most International Tourists | 0 | - | 4.88 | 75,185 |
| Cities and Towns of Massachusetts | 0 | - | 4.92 | 73,494 |
| Countries Larger Than Texas but With Fewer People | 0 | - | 4.92 | 39,706 |
| U.S. History for Dummies | 0 | - | 4.47 | 82,756 |
| States of Mexico | 0 | - | 4.95 | 174,822 |
| Mexico States Map Quiz | 0 | - | 4.84 | 104,208 |
| Events in U.S. History | 0 | - | 4.40 | 28,576 |
| Embarrassing Chapters in US History | 0 | - | 4.17 | 33,051 |
| U.S. State Nicknames | 0 | - | 4.47 | 50,399 |
| Countries with American Expatriates | 0 | - | 4.53 | 42,520 |
| United States Landmarks Map Quiz | 0 | - | 4.55 | 40,132 |
| United States Country Quiz | 0 | - | 4.43 | 101,076 |
| Busiest Air Routes from the U.S. | 0 | - | 4.46 | 76,741 |
| U.S. Presidents Quiz | 0 | - | 5.00 | 3,675,917 |
| American Founding Fathers | 0 | - | 4.42 | 23,117 |
| 100 Most Influential Figures in U.S. History | 0 | - | 4.20 | 44,839 |
| U.S. History Multiple Choice #3 | 0 | - | 4.43 | 24,691 |
| Valid Answer - U.S. History | 0 | - | 4.24 | 22,494 |
| 10 Northernmost U.S. States | 0 | - | 4.90 | 82,228 |
| Top 10 Largest U.S. States by Area | 0 | - | 4.95 | 159,565 |
| Top 10 Smallest U.S. States by Area | 0 | - | 4.98 | 177,391 |
| Top 10 Poorest U.S. States by Median Income | 0 | - | 4.86 | 124,892 |
| U.S. States with the Highest Percentage of Hispanics | 0 | - | 4.85 | 69,341 |
| Top 10 Newest U.S. States | 0 | - | 4.85 | 85,998 |
| Top 10 U.S. States Where the Rent is Too Dang High | 0 | - | 4.85 | 67,221 |
| Most-Visited Countries by Canadians | 0 | - | 4.82 | 39,188 |
| Countries Closest to Canada | 0 | - | 4.90 | 197,753 |
| Asian Countries Americans Travel to the Most | 0 | - | 4.75 | 59,806 |
| U.S. Geography by Letter - B | 0 | - | 4.53 | 68,988 |
| U.S. Geography by Letter - S | 0 | - | 4.55 | 52,475 |
| Two Letter U.S. State Abbreviations | 0 | - | 4.19 | 745,306 |
| Countries Closest to the U. S. | 0 | - | 4.41 | 208,493 |
| American Geography Quiz for Dummies | 0 | - | 4.41 | 68,938 |
| U.S. Federal Agency Acronyms | 0 | - | 4.50 | 79,856 |
| Top 10 Non-English Languages of Los Angeles | 0 | - | 4.42 | 59,744 |
| 10 Closest Megacities to New York City | 0 | - | 4.52 | 67,253 |
| Old West History | 0 | - | 4.33 | 15,242 |
| Life of Benjamin Franklin | 0 | - | 4.24 | 6,509 |
| American Revolution - Multiple Choice | 0 | - | 4.34 | 19,893 |
| New England States | 0 | - | 4.51 | 59,759 |
| U.S. States by Land Area | 0 | - | 4.61 | 52,656 |
| Top 10 U.S. States by Inland Water Area | 0 | - | 4.53 | 37,954 |
| Add a Letter - Make a U.S. State | 0 | - | 4.72 | 82,576 |
| Top 10 Widest U.S. States East to West | 0 | - | 4.70 | 55,838 |
| Top 10 Tallest U.S. States North to South | 0 | - | 4.74 | 40,794 |
| U.S. States by Borders | 0 | - | 4.63 | 35,205 |
| Save Americans by Guessing U.S. States | 0 | - | 4.61 | 184,090 |
| 10 Easternmost U.S. States | 0 | - | 4.53 | 56,374 |
| The Only U.S. State ... #1 | 0 | - | 4.52 | 101,837 |
| 50 States, 50 Cities - Hard Version | 0 | - | 4.46 | 44,093 |
| Countries that Beat Canada | 0 | - | 4.90 | 87,137 |
| The United States... or the United Kingdom? | 0 | - | 4.87 | 98,158 |
| Asian Last Names in the United States | 0 | - | 4.43 | 46,615 |
| History of Pennsylvania | 0 | - | 4.16 | 7,112 |
| History of Virginia | 0 | - | 4.31 | 11,577 |
| Georgia ... or Georgia? | 0 | - | 4.67 | 76,596 |
| Flags of North and South America | 0 | - | 4.99 | 370,393 |
| South America Map Quiz | 0 | - | 5.00 | 1,545,045 |
| Belize Country Quiz | 0 | - | 4.85 | 20,884 |
| Saint Vincent and the Grenadines Country Quiz | 0 | - | 4.88 | 19,127 |
| Countries of North America Quiz | 0 | - | 5.00 | 1,017,609 |
| Top U.S. Universities | 0 | - | 4.15 | 144,550 |
| Largest United States Airlines | 0 | - | 4.39 | 54,929 |
| U.S. Five-Star Generals and Admirals | 0 | - | 4.33 | 8,318 |
| 10 U.S. States With The Lowest Murder Rates | 0 | - | 4.51 | 41,722 |
| Biggest Trading Partners - United States | 0 | - | 4.63 | 106,512 |
| U.S. States by Governor | 0 | - | 4.43 | 18,018 |
| U.S. Political Parties in History | 0 | - | 4.44 | 27,628 |
| U.S. Government Agencies | 0 | - | 4.44 | 19,610 |
| Red State or Blue State Trait? | 0 | - | 4.42 | 55,136 |
| U.S. Presidents by Picture | 0 | - | 4.87 | 425,094 |
| Florida Pro Sport Teams | 0 | - | 4.61 | 11,796 |
| Boston Talk to English Translation Quiz | 0 | - | 4.59 | 55,842 |
| U.S. History Multiple Choice #2 | 0 | - | 4.32 | 25,031 |
| U.S. History Multiple Choice #1 | 0 | - | 4.31 | 22,203 |
| U.S. History Multiple Choice #4 | 0 | - | 4.26 | 25,538 |
| U.S. License Plates Picture Quiz | 0 | - | 4.59 | 52,781 |
| U.S. States with the Fewest Immigrants | 0 | - | 4.63 | 65,617 |
| U.S. States with the Highest Percentage of Farmland | 0 | - | 4.80 | 65,374 |
| U.S. States with the Lowest Percentage of Farmland | 0 | - | 4.74 | 55,115 |
| 10 U.S. States With The Highest Murder Rates | 0 | - | 4.47 | 53,681 |
| States and Provinces that touch the Rocky Mountains | 0 | - | 4.42 | 32,453 |
| Name a Valid U.S. State #2 | 0 | - | 4.63 | 76,750 |
| Walking Across U.S. State Borders with Hints | 0 | - | 4.74 | 34,981 |
| Name a Valid U.S. State #3 | 0 | - | 4.78 | 48,862 |
| U.S. States with the Longest International Borders | 0 | - | 4.78 | 45,701 |
| Longest U.S. State Borders | 0 | - | 4.67 | 39,603 |
| U.S. State Superlatives #1 | 0 | - | 4.47 | 87,393 |
| U.S. State Superlatives #2 | 0 | - | 4.53 | 40,549 |
| Top 10 U.S. States with the Highest Elevation | 0 | - | 4.51 | 67,824 |
| Top 10 U.S. States With the Most Tornadoes | 0 | - | 4.53 | 64,608 |
| Top 10 Least Religious U.S. States | 0 | - | 4.51 | 34,202 |
| Top 10 U.S. States by Public Transit | 0 | - | 4.77 | 63,582 |
| Top 10 U.S. States People are Leaving | 0 | - | 4.42 | 59,232 |
| Top 10 U.S. States People are Moving To | 0 | - | 4.73 | 63,712 |
| U.S. States with the Lowest Average Elevation | 0 | - | 4.55 | 38,440 |
| U.S. States With the Highest Average Elevation | 0 | - | 4.61 | 32,708 |
| Top 10 U.S. States with the Most Precipitation | 0 | - | 4.46 | 41,632 |
| U.S. States with the Fewest Borders | 0 | - | 4.77 | 113,267 |
| U.S. States with the Most Borders | 0 | - | 4.53 | 62,269 |
| Canada Provinces and Territories | 0 | - | 5.00 | 340,021 |
| Canada Provinces Map Quiz | 0 | - | 4.99 | 637,979 |
| U.S. Geography by Letter - C | 0 | - | 4.27 | 73,749 |
| U.S. Geography by Letter - A | 0 | - | 4.37 | 62,720 |
| U.S. Geography by Letter - D | 0 | - | 4.08 | 56,715 |
| U.S. Geography by Letter - T | 0 | - | 4.29 | 49,393 |
| U.S. Geography by Letter - P | 0 | - | 4.36 | 47,831 |
| U.S. Geography by Letter - M | 0 | - | 4.14 | 52,956 |
| U.S. Geography by Letter - L | 0 | - | 4.04 | 40,815 |
| U.S. Geography by Letter - G | 0 | - | 4.13 | 38,952 |
| U.S. Geography By Letter - H | 0 | - | 4.35 | 39,762 |
| Latin American Countries Map Quiz | 0 | - | 4.97 | 128,893 |
| Central America and Caribbean Map Quiz | 0 | - | 4.89 | 900,891 |
| Dominica Country Quiz | 0 | - | 4.81 | 19,747 |
| Territories of the United States | 0 | - | 4.79 | 52,264 |
| Third Most Common Language by U.S. State | 0 | - | 4.87 | 113,556 |
| Five Biggest Immigrant Groups by Decade in the US | 0 | - | 4.79 | 39,498 |
| Most Mentioned Enemies of the USA | 0 | - | 4.77 | 175,009 |
| American Legal Vocabulary | 0 | - | 4.40 | 33,846 |
| U.S. Cities by Picture #1 | 0 | - | 4.36 | 34,446 |
| Cities by Picture #2 | 0 | - | 4.19 | 35,019 |
| Major non-NATO U.S. Allies | 0 | - | 4.52 | 51,962 |
| The U.S. Government - How Does it Work? | 0 | - | 4.34 | 42,271 |
| First Names of U.S. Presidents | 0 | - | 4.85 | 380,457 |
| Famous People from California by Picture | 0 | - | 4.32 | 36,291 |
| California Groups of Things | 0 | - | 4.25 | 45,340 |
| Hawaiian Islands Map Quiz | 0 | - | 4.78 | 22,227 |
| New York Groups of Things | 0 | - | 4.38 | 60,023 |
| New York City Geography | 0 | - | 4.42 | 33,026 |
| The Life of Thomas Edison | 0 | - | 3.95 | 4,910 |
| Last 10 U.S. States Alphabetically | 0 | - | 4.35 | 74,725 |
| Top 10 Least Populous U.S. State Capitals | 0 | - | 4.52 | 21,497 |
| Flyover States | 0 | - | 4.52 | 29,450 |
| U.S. States With Double Letters | 0 | - | 4.54 | 24,016 |
| U.S. States Bigger than Their Neighbors | 0 | - | 4.27 | 75,981 |
| U.S. States by Wikipedia Descriptions #1 | 0 | - | 4.57 | 39,273 |
| U.S. States by Wikipedia Descriptions #2 | 0 | - | 4.47 | 37,035 |
| 50 States, 50 Cities - Easy Version | 0 | - | 4.39 | 128,169 |
| Top 10 Richest U.S. States by Median Income | 0 | - | 4.47 | 118,713 |
| Top 10 Least-Forested U.S. States | 0 | - | 4.50 | 46,421 |
| Countries of Europe in 1650 with a Map | 0 | - | 4.95 | 68,386 |
| The Only American Country ... | 0 | - | 4.92 | 121,193 |
| American Countries with the Shortest Names | 0 | - | 4.96 | 120,750 |
| North American Capitals - Map Quiz | 0 | - | 4.87 | 57,461 |
| All First-Level Subdivisions of North America on a Map | 0 | - | 4.97 | 63,533 |
| Name a Valid U.S. President #1 | 0 | - | 4.89 | 190,779 |
| Play-Doh Presidents | 0 | - | 5.00 | 81,964 |
| Who Did that Motown Song? | 0 | - | 4.48 | 13,038 |
| Regions of U.S. States | 0 | - | 4.37 | 43,668 |
| States, Provinces & Territories that Touch the Appalachian Mountains | 0 | - | 4.59 | 20,358 |
| 10 U.S. States with the Most Valuable Crops | 0 | - | 4.41 | 29,524 |
| U.S. States with the Lowest HDI | 0 | - | 4.47 | 28,813 |
| Which U.S. State - Multiple Choice | 0 | - | 4.48 | 20,246 |
| Movies by State | 0 | - | 4.27 | 40,494 |
| Canada Country Quiz | 0 | - | 4.54 | 132,113 |
| Canada Cities Map Quiz | 0 | - | 4.63 | 123,901 |
| Canada A-Z | 0 | - | 4.73 | 32,727 |
