| U.S. Cabinet Departments | 0 | - | 4.86 | 72,934 |
| Deadliest U.S. Wars | 0 | - | 4.89 | 191,049 |
| US States Quiz | 0 | - | 5.00 | 16,914,332 |
| States of the U.S. in Alphabetical Order | 0 | - | 4.98 | 367,775 |
| Top 10 Coldest U.S. States | 0 | - | 4.94 | 125,272 |
| Top 10 Hottest U.S. States | 0 | - | 4.86 | 125,908 |
| Top 10 U.S. States with the Least Precipitation | 0 | - | 4.82 | 61,990 |
| Name the U.S. National Parks | 0 | - | 4.86 | 60,099 |
| Total United States Immigration by Country | 0 | - | 4.91 | 111,852 |
| Most Common U.S. Last Names - Extreme | 0 | - | 4.94 | 174,811 |
| "Do Not Travel" Countries for U.S. Citizens | 0 | - | 4.97 | 244,774 |
| Top 10 Non-English Languages Spoken in New York City | 0 | - | 4.85 | 66,381 |
| All 3,143 Counties of the United States on a Map | 0 | - | 4.97 | 333,033 |
| Pixelated United States Map | 0 | - | 4.88 | 94,442 |
| Most-Visited Countries by Americans | 0 | - | 4.86 | 109,920 |
| Countries that Visit the United States the Most | 0 | - | 4.96 | 91,975 |
| The 13 Colonies Quiz | 0 | - | 4.97 | 118,117 |
| U.S. States with the Letter Y | 0 | - | 4.85 | 111,689 |
| 10 Southernmost U.S. States | 0 | - | 4.89 | 113,650 |
| U.S. States with Short Names | 0 | - | 4.91 | 149,313 |
| U.S. States that Start with M | 0 | - | 4.93 | 187,616 |
| U.S. States By Population | 0 | - | 4.92 | 153,724 |
| U.S. States that Start with N | 0 | - | 4.95 | 171,686 |
| U.S. States with Longest Names | 0 | - | 4.84 | 44,584 |
| U.S. States with a Unique First Letter | 0 | - | 4.96 | 88,490 |
| 10 Westernmost U.S. States | 0 | - | 4.95 | 64,326 |
| The Only Remaining U.S. State . . . | 0 | - | 4.93 | 65,779 |
| Midwestern States of the U.S. | 0 | - | 4.88 | 13,906 |
| US States with an Empty Map | 0 | - | 5.00 | 625,899 |
| 10 Longest Rivers in the United States | 0 | - | 4.85 | 39,231 |
| Countries Closest to United States by Continent | 0 | - | 4.99 | 146,667 |
| Countries that Beat the United States | 0 | - | 4.93 | 167,797 |
| Louisiana Purchase with a Map | 0 | - | 4.96 | 48,826 |
| Top 10 Most-Visited U.S. States | 0 | - | 4.90 | 101,926 |
| U.S. States with the Most Immigrants | 0 | - | 4.85 | 82,599 |
| U.S. States or European Countries by Area | 0 | - | 4.95 | 96,352 |
| U.S. States or European Countries by Population | 0 | - | 4.97 | 133,480 |
| U.S. Geography by Letter - B | 0 | - | 4.53 | 69,531 |
| U.S. Geography by Letter - S | 0 | - | 4.55 | 52,960 |
| Two Letter U.S. State Abbreviations | 0 | - | 4.19 | 747,977 |
| Famous People from California by Picture | 0 | - | 4.32 | 36,527 |
| California Groups of Things | 0 | - | 4.25 | 45,525 |
| Top 10 Non-English Languages of Los Angeles | 0 | - | 4.43 | 59,953 |
| 10 Closest Megacities to New York City | 0 | - | 4.52 | 67,389 |
| Name a Valid U.S. State #1 | 0 | - | 4.93 | 209,426 |
| Top 10 Most Native American U.S. States | 0 | - | 4.87 | 92,319 |
| U.S. Citizenship Test Questions | 0 | - | 4.83 | 239,727 |
| Top 10 Biggest Economies in the Americas | 0 | - | 4.94 | 92,366 |
| States of Mexico | 0 | - | 4.96 | 176,706 |
| Mexico States Map Quiz | 0 | - | 4.84 | 105,013 |
| Top U.S. Universities | 0 | - | 4.15 | 145,361 |
| U.S. States by Governor | 0 | - | 4.43 | 18,078 |
| U.S. Political Parties in History | 0 | - | 4.44 | 27,715 |
| U.S. Government Agencies | 0 | - | 4.44 | 19,708 |
| Geography of California | 0 | - | 4.26 | 10,587 |
| Top 10 Richest Countries in the Americas | 0 | - | 4.93 | 84,406 |
| U.S. Geography by Letter - C | 0 | - | 4.27 | 74,176 |
| U.S. Geography by Letter - A | 0 | - | 4.37 | 63,208 |
| U.S. Geography by Letter - D | 0 | - | 4.09 | 57,175 |
| U.S. Geography by Letter - T | 0 | - | 4.29 | 49,875 |
| U.S. Geography by Letter - P | 0 | - | 4.38 | 54,016 |
| U.S. Geography by Letter - M | 0 | - | 4.14 | 53,387 |
| U.S. Geography by Letter - L | 0 | - | 4.04 | 41,234 |
| U.S. Geography by Letter - G | 0 | - | 4.13 | 39,396 |
| U.S. Geography By Letter - H | 0 | - | 4.35 | 40,259 |
| Mexico Cities Map Quiz | 0 | - | 4.83 | 38,651 |
| U.S. State Nicknames | 0 | - | 4.47 | 50,587 |
| Countries with American Expatriates | 0 | - | 4.53 | 42,611 |
| United States Landmarks Map Quiz | 0 | - | 4.55 | 40,213 |
| American Legal Vocabulary | 0 | - | 4.40 | 33,955 |
| United States Country Quiz | 0 | - | 4.43 | 101,701 |
| Busiest Air Routes from the U.S. | 0 | - | 4.46 | 76,943 |
| The U.S. Government - How Does it Work? | 0 | - | 4.34 | 42,397 |
| Los Angeles vs. New York | 0 | - | 4.41 | 19,920 |
| Hawaiian Islands Map Quiz | 0 | - | 4.78 | 22,292 |
| New York Groups of Things | 0 | - | 4.35 | 63,917 |
| People on Money - United States | 0 | - | 4.31 | 63,371 |
| 100 Most Influential Figures in U.S. History | 0 | - | 4.20 | 45,115 |
| Top 10 U.S. States With the Most Tornadoes | 0 | - | 4.53 | 64,845 |
| Top 10 U.S. States by Public Transit | 0 | - | 4.77 | 63,850 |
| Top 10 U.S. States with the Most Precipitation | 0 | - | 4.46 | 41,739 |
| Most-Visited Countries by Canadians | 0 | - | 4.82 | 39,443 |
| Countries Closest to Canada | 0 | - | 4.91 | 198,581 |
| Asian Countries Americans Travel to the Most | 0 | - | 4.75 | 60,053 |
| Most Guessed U.S. Cities | 0 | - | 4.89 | 106,273 |
| Musical Acts from Los Angeles by Two Songs | 0 | - | 4.27 | 16,172 |
| Movies Set in San Francisco | 0 | - | 4.23 | 19,943 |
| Who Did that Motown Song? | 0 | - | 4.48 | 13,062 |
| United States Map Quiz | 0 | - | 4.98 | 4,163,283 |
| Countries Closest to the U. S. | 0 | - | 4.41 | 209,797 |
| U.S. Federal Agency Acronyms | 0 | - | 4.50 | 80,031 |
| Senators Who Ran For President | 0 | - | 4.24 | 17,056 |
| U.S. Electoral College Landslides | 0 | - | 4.35 | 22,051 |
| Countries Closest to Alaska | 0 | - | 4.93 | 124,558 |
| California Pro Sport Teams | 0 | - | 4.19 | 22,697 |
| Countries Closest to Maine | 0 | - | 4.85 | 67,242 |
| New York Pro Sport Teams | 0 | - | 4.32 | 25,920 |
| New England States | 0 | - | 4.51 | 59,831 |
| U.S. License Plates Picture Quiz | 0 | - | 4.61 | 52,984 |
| U.S. States with the Fewest Immigrants | 0 | - | 4.63 | 65,886 |
| U.S. States by Land Area | 0 | - | 4.61 | 52,880 |
| Top 10 U.S. States by Inland Water Area | 0 | - | 4.53 | 38,033 |
| U.S. States with the Highest Percentage of Farmland | 0 | - | 4.80 | 65,530 |
| U.S. States with the Lowest Percentage of Farmland | 0 | - | 4.74 | 55,240 |
| Add a Letter - Make a U.S. State | 0 | - | 4.70 | 82,906 |
| Top 10 Widest U.S. States East to West | 0 | - | 4.70 | 56,107 |
| Top 10 Tallest U.S. States North to South | 0 | - | 4.74 | 40,999 |
| U.S. States by Borders | 0 | - | 4.61 | 35,371 |
| Walking Across U.S. State Borders with Hints | 0 | - | 4.74 | 35,071 |
| 10 Easternmost U.S. States | 0 | - | 4.53 | 56,537 |
| The Only U.S. State ... #1 | 0 | - | 4.52 | 102,141 |
| U.S. States with the Longest International Borders | 0 | - | 4.78 | 45,840 |
| Longest U.S. State Borders | 0 | - | 4.67 | 39,917 |
| 50 States, 50 Cities - Hard Version | 0 | - | 4.46 | 44,267 |
| Top 10 U.S. States with the Highest Elevation | 0 | - | 4.51 | 67,907 |
| U.S. States with the Lowest Average Elevation | 0 | - | 4.55 | 38,525 |
| U.S. States With the Highest Average Elevation | 0 | - | 4.61 | 32,792 |
| U.S. States with the Fewest Borders | 0 | - | 4.78 | 113,975 |
| U.S. States with the Most Borders | 0 | - | 4.53 | 62,323 |
| U.S. States With No City Over 100,000 | 0 | - | 4.57 | 18,032 |
| Asian Last Names in the United States | 0 | - | 4.43 | 46,829 |
| Georgia ... or Georgia? | 0 | - | 4.67 | 76,860 |
| Flags of North and South America | 0 | - | 4.99 | 374,202 |
| U.S. Geography by Letter - N | 0 | - | 3.80 | 52,811 |
| U.S. Geography by Letter - E | 0 | - | 3.75 | 48,843 |
| U.S. Geography by Letter - F | 0 | - | 3.84 | 45,105 |
| U.S. Geography by Letter - O | 0 | - | 3.52 | 41,567 |
| U.S. Geography by Letter - R | 0 | - | 4.18 | 32,318 |
| Belize Country Quiz | 0 | - | 4.85 | 21,012 |
| Largest United States Airlines | 0 | - | 4.39 | 55,071 |
| U.S. Five-Star Generals and Admirals | 0 | - | 4.33 | 8,339 |
| 10 U.S. States With The Lowest Murder Rates | 0 | - | 4.48 | 52,010 |
| Countries Closest to United States A-Z | 0 | - | 4.82 | 118,333 |
| Biggest Trading Partners - United States | 0 | - | 4.63 | 106,722 |
| Famous People from Alabama by Picture | 0 | - | 4.07 | 24,086 |
| Florida Pro Sport Teams | 0 | - | 4.61 | 11,863 |
| Hawaiian Islands | 0 | - | 4.83 | 42,770 |
| Famous People from Michigan by Picture | 0 | - | 4.30 | 21,426 |
| Famous People from New York by Picture | 0 | - | 4.03 | 27,522 |
| Famous People from Texas by Picture | 0 | - | 3.99 | 33,395 |
| U.S. States that Border Tennessee | 0 | - | 4.83 | 65,374 |
| Events in U.S. History | 0 | - | 4.41 | 28,707 |
| 10 U.S. States With The Highest Murder Rates | 0 | - | 4.47 | 54,520 |
| States and Provinces that touch the Rocky Mountains | 0 | - | 4.43 | 32,513 |
| Name a Valid U.S. State #2 | 0 | - | 4.63 | 77,144 |
| Name a Valid U.S. State #3 | 0 | - | 4.78 | 49,094 |
| U.S. State Superlatives #1 | 0 | - | 4.47 | 87,573 |
| U.S. State Superlatives #2 | 0 | - | 4.53 | 40,668 |
| Top 10 Least Religious U.S. States | 0 | - | 4.51 | 34,344 |
| Third Most Common Language by U.S. State | 0 | - | 4.87 | 113,804 |
| U.S. Cities by Picture #1 | 0 | - | 4.36 | 34,611 |
| Cities by Picture #2 | 0 | - | 4.19 | 35,180 |
| Major non-NATO U.S. Allies | 0 | - | 4.52 | 52,284 |
| American Founding Fathers | 0 | - | 4.42 | 23,238 |
| California Cities A-Z | 0 | - | 4.06 | 17,302 |
| Movies Set in Miami | 0 | - | 4.32 | 16,704 |
| U.S. History Groups of Two | 0 | - | 4.23 | 44,503 |
| Last 10 U.S. States Alphabetically | 0 | - | 4.35 | 74,913 |
| Top 10 Least Populous U.S. State Capitals | 0 | - | 4.52 | 21,538 |
| Flyover States | 0 | - | 4.52 | 29,536 |
| U.S. States With Double Letters | 0 | - | 4.55 | 24,165 |
| U.S. States Bigger than Their Neighbors | 0 | - | 4.28 | 76,252 |
| U.S. States by Wikipedia Descriptions #1 | 0 | - | 4.57 | 39,380 |
| U.S. States by Wikipedia Descriptions #2 | 0 | - | 4.48 | 37,132 |
| 50 States, 50 Cities - Easy Version | 0 | - | 4.39 | 128,478 |
| Top 10 Richest U.S. States by Median Income | 0 | - | 4.47 | 119,166 |
| Top 10 Least-Forested U.S. States | 0 | - | 4.50 | 46,565 |
| Famous Canadians by Picture | 0 | - | 4.39 | 49,406 |
| Category Elimination - African Geography #1 | 0 | - | 4.90 | 92,577 |
| The Only American Country ... | 0 | - | 4.92 | 121,804 |
| American Countries with the Shortest Names | 0 | - | 4.96 | 121,262 |
| All First-Level Subdivisions of South America on a Map | 0 | - | 4.92 | 54,157 |
| Brazil States Map Quiz | 0 | - | 4.86 | 48,232 |
| States of Brazil | 0 | - | 4.97 | 88,555 |
| U.S. State Border Crossings | 0 | - | 4.97 | 96,599 |
| Fictional Characters from the Midwest by Picture | 0 | - | 4.04 | 19,208 |
| U.S. Cities with the Most International Tourists | 0 | - | 4.88 | 75,598 |
| Names of Generations | 0 | - | 4.09 | 45,173 |
| U.S. States by Picture #1 | 0 | - | 4.21 | 15,465 |
| Most-Visited U.S. Cities | 0 | - | 4.85 | 94,183 |
| Every U.S. Metro Area on a Map | 0 | - | 4.97 | 82,000 |
| Politicians with Other Careers | 0 | - | 3.98 | 15,029 |
| Main Parts of the U.S. Budget | 0 | - | 3.45 | 8,725 |
| Cities of Los Angeles County on a Map | 0 | - | 4.69 | 27,156 |
| Chicago City Trivia | 0 | - | 4.31 | 31,473 |
| Cities and Towns of Massachusetts | 0 | - | 4.92 | 74,375 |
| Countries Larger Than Texas but With Fewer People | 0 | - | 4.92 | 40,025 |
| Texas Pro Sport Teams | 0 | - | 4.19 | 16,831 |
| History of Pennsylvania | 0 | - | 4.16 | 7,145 |
| History of Virginia | 0 | - | 4.31 | 11,614 |
| Washington State by Picture | 0 | - | 4.26 | 7,738 |
| Regions of U.S. States | 0 | - | 4.37 | 43,974 |
| States, Provinces & Territories that Touch the Appalachian Mountains | 0 | - | 4.59 | 20,399 |
| 10 U.S. States with the Most Valuable Crops | 0 | - | 4.41 | 29,597 |
| U.S. States with the Lowest HDI | 0 | - | 4.47 | 28,872 |
| Events by U.S. State #1 | 0 | - | 4.43 | 22,927 |
| Which U.S. State - Multiple Choice | 0 | - | 4.48 | 20,319 |
| Movies by State | 0 | - | 4.27 | 40,563 |
| Most Valuable Crops by U.S. State | 0 | - | 4.40 | 39,133 |
| 10 U.S. States with the Highest Tax Burden | 0 | - | 4.26 | 38,270 |
