| Deadliest U.S. Wars | 0 | - | 4.89 | 191,946 |
| U.S. Cabinet Departments | 0 | - | 4.86 | 73,159 |
| US States Quiz | 0 | - | 5.00 | 17,019,481 |
| States of the U.S. in Alphabetical Order | 0 | - | 4.98 | 368,871 |
| Top 10 Coldest U.S. States | 0 | - | 4.94 | 125,981 |
| Top 10 Hottest U.S. States | 0 | - | 4.86 | 126,640 |
| Top 10 U.S. States with the Least Precipitation | 0 | - | 4.83 | 62,254 |
| Name the U.S. National Parks | 0 | - | 4.86 | 60,586 |
| Total United States Immigration by Country | 0 | - | 4.91 | 112,549 |
| Most Common U.S. Last Names - Extreme | 0 | - | 4.94 | 175,726 |
| "Do Not Travel" Countries for U.S. Citizens | 0 | - | 4.97 | 246,967 |
| Top 10 Non-English Languages Spoken in New York City | 0 | - | 4.85 | 66,809 |
| All 3,143 Counties of the United States on a Map | 0 | - | 4.97 | 336,157 |
| Pixelated United States Map | 0 | - | 4.89 | 94,916 |
| Most-Visited Countries by Americans | 0 | - | 4.86 | 110,713 |
| Countries that Visit the United States the Most | 0 | - | 4.96 | 92,573 |
| The 13 Colonies Quiz | 0 | - | 4.97 | 119,171 |
| U.S. States with the Letter Y | 0 | - | 4.86 | 112,420 |
| 10 Southernmost U.S. States | 0 | - | 4.89 | 114,442 |
| U.S. States with Short Names | 0 | - | 4.91 | 150,496 |
| U.S. States that Start with M | 0 | - | 4.93 | 188,537 |
| U.S. States By Population | 0 | - | 4.92 | 154,242 |
| U.S. States that Start with N | 0 | - | 4.95 | 172,356 |
| U.S. States with Longest Names | 0 | - | 4.85 | 44,969 |
| U.S. States with a Unique First Letter | 0 | - | 4.96 | 88,967 |
| 10 Westernmost U.S. States | 0 | - | 4.95 | 64,592 |
| The Only Remaining U.S. State . . . | 0 | - | 4.93 | 66,197 |
| 10 Longest Rivers in the United States | 0 | - | 4.85 | 39,441 |
| Countries Closest to United States by Continent | 0 | - | 4.99 | 147,374 |
| Countries that Beat the United States | 0 | - | 4.93 | 168,879 |
| Louisiana Purchase with a Map | 0 | - | 4.96 | 49,438 |
| US States with an Empty Map | 0 | - | 5.00 | 629,506 |
| Top 10 Most-Visited U.S. States | 0 | - | 4.90 | 102,572 |
| U.S. States with the Most Immigrants | 0 | - | 4.85 | 83,102 |
| U.S. States or European Countries by Area | 0 | - | 4.95 | 97,367 |
| U.S. States or European Countries by Population | 0 | - | 4.97 | 134,573 |
| U.S. Geography by Letter - B | 0 | - | 4.54 | 70,133 |
| U.S. Geography by Letter - S | 0 | - | 4.55 | 58,526 |
| Two Letter U.S. State Abbreviations | 0 | - | 4.19 | 750,283 |
| Name a Valid U.S. State #1 | 0 | - | 4.93 | 210,828 |
| Top 10 Most Native American U.S. States | 0 | - | 4.87 | 92,976 |
| U.S. Citizenship Test Questions | 0 | - | 4.83 | 240,957 |
| Top 10 Biggest Economies in the Americas | 0 | - | 4.94 | 92,941 |
| States of Mexico | 0 | - | 4.96 | 178,689 |
| Mexico States Map Quiz | 0 | - | 4.85 | 105,766 |
| Top U.S. Universities | 0 | - | 4.15 | 145,969 |
| Major non-NATO U.S. Allies | 0 | - | 4.52 | 52,590 |
| U.S. States by Governor | 0 | - | 4.43 | 18,121 |
| U.S. Political Parties in History | 0 | - | 4.44 | 27,783 |
| U.S. Government Agencies | 0 | - | 4.44 | 19,800 |
| Midwestern States of the U.S. | 0 | - | 4.88 | 14,210 |
| Top 10 Richest Countries in the Americas | 0 | - | 4.94 | 95,646 |
| U.S. Geography by Letter - C | 0 | - | 4.27 | 74,682 |
| U.S. Geography by Letter - A | 0 | - | 4.37 | 63,735 |
| U.S. Geography by Letter - D | 0 | - | 4.09 | 57,694 |
| U.S. Geography by Letter - T | 0 | - | 4.29 | 50,455 |
| U.S. Geography by Letter - P | 0 | - | 4.40 | 54,604 |
| U.S. Geography by Letter - M | 0 | - | 4.14 | 53,774 |
| U.S. Geography by Letter - L | 0 | - | 4.04 | 41,715 |
| U.S. Geography by Letter - G | 0 | - | 4.13 | 39,863 |
| U.S. Geography by Letter - R | 0 | - | 4.22 | 37,067 |
| U.S. Geography By Letter - H | 0 | - | 4.35 | 40,792 |
| Mexico Cities Map Quiz | 0 | - | 4.83 | 38,857 |
| U.S. State Nicknames | 0 | - | 4.47 | 50,795 |
| Countries with American Expatriates | 0 | - | 4.53 | 42,695 |
| U.S. Five-Star Generals and Admirals | 0 | - | 4.33 | 8,363 |
| United States Landmarks Map Quiz | 0 | - | 4.55 | 40,294 |
| American Legal Vocabulary | 0 | - | 4.40 | 34,044 |
| United States Country Quiz | 0 | - | 4.43 | 102,327 |
| Busiest Air Routes from the U.S. | 0 | - | 4.46 | 77,097 |
| The U.S. Government - How Does it Work? | 0 | - | 4.34 | 42,493 |
| People on Money - United States | 0 | - | 4.31 | 63,450 |
| 100 Most Influential Figures in U.S. History | 0 | - | 4.20 | 45,258 |
| Top 10 U.S. States With the Most Tornadoes | 0 | - | 4.54 | 65,049 |
| Top 10 U.S. States by Public Transit | 0 | - | 4.74 | 64,098 |
| Top 10 U.S. States with the Most Precipitation | 0 | - | 4.46 | 41,843 |
| Most-Visited Countries by Canadians | 0 | - | 4.83 | 39,663 |
| Countries Closest to Canada | 0 | - | 4.91 | 199,628 |
| Asian Countries Americans Travel to the Most | 0 | - | 4.75 | 60,252 |
| Most Guessed U.S. Cities | 0 | - | 4.89 | 107,182 |
| Countries Closest to the U. S. | 0 | - | 4.41 | 210,711 |
| U.S. Federal Agency Acronyms | 0 | - | 4.50 | 80,178 |
| Top 10 Non-English Languages of Los Angeles | 0 | - | 4.43 | 60,156 |
| 10 Closest Megacities to New York City | 0 | - | 4.52 | 67,558 |
| New England States | 0 | - | 4.51 | 59,912 |
| U.S. States by Land Area | 0 | - | 4.55 | 53,111 |
| Top 10 U.S. States by Inland Water Area | 0 | - | 4.53 | 38,136 |
| Add a Letter - Make a U.S. State | 0 | - | 4.70 | 83,213 |
| Top 10 Widest U.S. States East to West | 0 | - | 4.70 | 56,332 |
| Top 10 Tallest U.S. States North to South | 0 | - | 4.75 | 41,180 |
| U.S. States by Borders | 0 | - | 4.61 | 35,513 |
| 10 Easternmost U.S. States | 0 | - | 4.53 | 56,713 |
| The Only U.S. State ... #1 | 0 | - | 4.52 | 102,391 |
| 50 States, 50 Cities - Hard Version | 0 | - | 4.46 | 44,479 |
| Countries that Beat Canada | 0 | - | 4.90 | 99,100 |
| Asian Last Names in the United States | 0 | - | 4.43 | 47,000 |
| United States Map Quiz | 0 | - | 4.98 | 4,173,320 |
| Senators Who Ran For President | 0 | - | 4.24 | 17,092 |
| U.S. Electoral College Landslides | 0 | - | 4.35 | 22,098 |
| Countries with the Most Military Troops | 0 | - | 4.95 | 291,874 |
| Countries with Nuclear Weapons | 0 | - | 4.86 | 277,634 |
| Countries with NO Military | 0 | - | 4.97 | 63,595 |
| Flags of North and South America | 0 | - | 4.99 | 378,032 |
| U.S. Geography by Letter - N | 0 | - | 3.80 | 53,194 |
| U.S. Geography by Letter - E | 0 | - | 3.75 | 49,231 |
| U.S. Geography by Letter - F | 0 | - | 3.85 | 45,508 |
| U.S. Geography by Letter - O | 0 | - | 3.52 | 41,979 |
| Belize Country Quiz | 0 | - | 4.85 | 21,112 |
| Largest United States Airlines | 0 | - | 4.39 | 55,182 |
| 10 U.S. States With The Lowest Murder Rates | 0 | - | 4.48 | 53,104 |
| Countries Closest to United States A-Z | 0 | - | 4.82 | 118,821 |
| Biggest Trading Partners - United States | 0 | - | 4.63 | 106,912 |
| Florida Pro Sport Teams | 0 | - | 4.61 | 11,914 |
| Boston Talk to English Translation Quiz | 0 | - | 4.59 | 56,290 |
| Events in U.S. History | 0 | - | 4.41 | 28,855 |
| The American Civil War | 0 | - | 4.62 | 52,655 |
| U.S. License Plates Picture Quiz | 0 | - | 4.61 | 53,185 |
| U.S. States with the Fewest Immigrants | 0 | - | 4.64 | 66,163 |
| U.S. States with the Highest Percentage of Farmland | 0 | - | 4.80 | 65,679 |
| U.S. States with the Lowest Percentage of Farmland | 0 | - | 4.70 | 61,485 |
| 10 U.S. States With The Highest Murder Rates | 0 | - | 4.47 | 54,906 |
| States and Provinces that touch the Rocky Mountains | 0 | - | 4.43 | 32,575 |
| Name a Valid U.S. State #2 | 0 | - | 4.63 | 77,473 |
| Walking Across U.S. State Borders with Hints | 0 | - | 4.75 | 35,131 |
| Name a Valid U.S. State #3 | 0 | - | 4.78 | 49,340 |
| U.S. States with the Longest International Borders | 0 | - | 4.78 | 45,978 |
| Longest U.S. State Borders | 0 | - | 4.69 | 40,193 |
| U.S. State Superlatives #1 | 0 | - | 4.47 | 87,709 |
| U.S. State Superlatives #2 | 0 | - | 4.53 | 40,782 |
| Top 10 U.S. States with the Highest Elevation | 0 | - | 4.51 | 67,996 |
| Top 10 Least Religious U.S. States | 0 | - | 4.51 | 34,479 |
| U.S. States with the Lowest Average Elevation | 0 | - | 4.55 | 38,584 |
| U.S. States With the Highest Average Elevation | 0 | - | 4.61 | 32,849 |
| U.S. States with the Fewest Borders | 0 | - | 4.78 | 114,552 |
| U.S. States with the Most Borders | 0 | - | 4.53 | 62,385 |
| Georgia ... or Georgia? | 0 | - | 4.68 | 77,090 |
| Third Most Common Language by U.S. State | 0 | - | 4.87 | 114,036 |
| U.S. Cities by Picture #1 | 0 | - | 4.36 | 34,756 |
| Cities by Picture #2 | 0 | - | 4.19 | 35,324 |
| American Founding Fathers | 0 | - | 4.42 | 23,278 |
| Famous People from California by Picture | 0 | - | 4.32 | 36,746 |
| California Groups of Things | 0 | - | 4.26 | 45,803 |
| Hawaiian Islands Map Quiz | 0 | - | 4.78 | 22,328 |
| New York Groups of Things | 0 | - | 4.39 | 72,357 |
| U.S. History Groups of Two | 0 | - | 4.23 | 44,622 |
| Last 10 U.S. States Alphabetically | 0 | - | 4.35 | 75,105 |
| Top 10 Least Populous U.S. State Capitals | 0 | - | 4.52 | 21,580 |
| Flyover States | 0 | - | 4.53 | 29,615 |
| U.S. States With Double Letters | 0 | - | 4.55 | 24,300 |
| U.S. States Bigger than Their Neighbors | 0 | - | 4.28 | 76,451 |
| U.S. States by Wikipedia Descriptions #1 | 0 | - | 4.57 | 39,479 |
| U.S. States by Wikipedia Descriptions #2 | 0 | - | 4.48 | 37,208 |
| 50 States, 50 Cities - Easy Version | 0 | - | 4.39 | 129,036 |
| Top 10 Richest U.S. States by Median Income | 0 | - | 4.46 | 119,381 |
| Top 10 Least-Forested U.S. States | 0 | - | 4.50 | 46,707 |
| Famous Canadians by Picture | 0 | - | 4.39 | 49,535 |
| Countries with the Most Tanks | 0 | - | 4.91 | 108,454 |
| Countries With the Largest Air Forces | 0 | - | 4.47 | 51,669 |
| The Only American Country ... | 0 | - | 4.92 | 122,339 |
| American Countries with the Shortest Names | 0 | - | 4.97 | 121,767 |
| U.S. State Border Crossings | 0 | - | 4.97 | 96,953 |
| U.S. Cities with the Most International Tourists | 0 | - | 4.88 | 76,047 |
| Names of Generations | 0 | - | 4.09 | 45,588 |
| Cities and Towns of Massachusetts | 0 | - | 4.93 | 75,181 |
| Who Did that Motown Song? | 0 | - | 4.48 | 13,079 |
| Countries Larger Than Texas but With Fewer People | 0 | - | 4.92 | 40,323 |
| Regions of U.S. States | 0 | - | 4.37 | 44,248 |
| States, Provinces & Territories that Touch the Appalachian Mountains | 0 | - | 4.59 | 20,430 |
| 10 U.S. States with the Most Valuable Crops | 0 | - | 4.41 | 29,640 |
| U.S. States with the Lowest HDI | 0 | - | 4.47 | 28,942 |
| Which U.S. State - Multiple Choice | 0 | - | 4.48 | 20,383 |
| Movies by State | 0 | - | 4.27 | 40,618 |
| U.S. States with the Fewest Traffic Fatalities | 0 | - | 4.20 | 21,212 |
| U.S. States with the Most Traffic Fatalities | 0 | - | 4.10 | 19,220 |
| Canada Country Quiz | 0 | - | 4.55 | 133,158 |
| Canada Cities Map Quiz | 0 | - | 4.64 | 124,675 |
| Canada A-Z | 0 | - | 4.73 | 32,990 |
| European Geography By Letter - P #1 | 0 | - | 4.81 | 99,084 |
| Catholic Countries in Europe | 0 | - | 4.83 | 95,887 |
| Monarchies of Europe | 0 | - | 4.90 | 99,018 |
| European Geography By Letter - B #2 | 0 | - | 4.87 | 89,057 |
| Category Elimination - European Geography #3 | 0 | - | 4.86 | 82,152 |
| Asian Geography By Letter - B | 0 | - | 4.85 | 67,103 |
| Monarchies of Asia | 0 | - | 4.97 | 71,596 |
| Asian Country Superlatives | 0 | - | 4.84 | 81,344 |
| Military History Vocabulary | 0 | - | 4.92 | 67,755 |
| Battle to Country | 0 | - | 4.91 | 54,099 |
| Top 10 American Countries by Coastline | 0 | - | 4.96 | 88,662 |
| U.S. Geography by Letter - W | 0 | - | 3.86 | 23,905 |
| Mexico Country Quiz | 0 | - | 4.49 | 72,822 |
| All First-Level Subdivisions of South America on a Map | 0 | - | 4.93 | 55,008 |
| Brazil States Map Quiz | 0 | - | 4.86 | 48,710 |
| States of Brazil | 0 | - | 4.98 | 90,022 |
| Colombia Country Quiz | 0 | - | 4.90 | 41,048 |
| 15 Largest Cities in North America With a Map | 0 | - | 4.98 | 48,169 |
| 100 Biggest Cities in North America on a Map | 0 | - | 4.84 | 63,037 |
| Fictional Characters from the Midwest by Picture | 0 | - | 4.04 | 19,239 |
| Biggest Cities in the U.S. - Extreme | 0 | - | 4.95 | 160,213 |
| Biggest Cities in Each U.S. State - Extreme | 0 | - | 4.91 | 84,953 |
| 10 Biggest Cities by U.S. State | 0 | - | 4.95 | 42,603 |
