| Pixelated United States Map | 0 | - | 4.88 | 94,491 |
| US States Quiz | 0 | - | 5.00 | 16,922,294 |
| States of the U.S. in Alphabetical Order | 0 | - | 4.98 | 367,852 |
| Name the U.S. National Parks | 0 | - | 4.86 | 60,130 |
| Total United States Immigration by Country | 0 | - | 4.91 | 111,893 |
| Most Common U.S. Last Names - Extreme | 0 | - | 4.94 | 174,892 |
| "Do Not Travel" Countries for U.S. Citizens | 0 | - | 4.97 | 244,921 |
| U.S. Cabinet Departments | 0 | - | 4.86 | 72,945 |
| Top 10 Non-English Languages Spoken in New York City | 0 | - | 4.85 | 66,416 |
| All 3,143 Counties of the United States on a Map | 0 | - | 4.97 | 333,254 |
| Most-Visited Countries by Americans | 0 | - | 4.86 | 109,965 |
| Countries that Visit the United States the Most | 0 | - | 4.96 | 92,013 |
| Deadliest U.S. Wars | 0 | - | 4.89 | 191,223 |
| The 13 Colonies Quiz | 0 | - | 4.97 | 118,144 |
| U.S. States with the Letter Y | 0 | - | 4.85 | 111,738 |
| 10 Southernmost U.S. States | 0 | - | 4.89 | 113,688 |
| U.S. States with Short Names | 0 | - | 4.91 | 149,364 |
| U.S. States that Start with M | 0 | - | 4.93 | 187,683 |
| U.S. States By Population | 0 | - | 4.92 | 153,758 |
| U.S. States that Start with N | 0 | - | 4.95 | 171,743 |
| U.S. States with Longest Names | 0 | - | 4.84 | 44,608 |
| U.S. States with a Unique First Letter | 0 | - | 4.96 | 88,528 |
| 10 Westernmost U.S. States | 0 | - | 4.95 | 64,339 |
| The Only Remaining U.S. State . . . | 0 | - | 4.93 | 65,805 |
| Flags of North and South America | 0 | - | 4.99 | 374,465 |
| 10 Longest Rivers in the United States | 0 | - | 4.85 | 39,247 |
| Countries Closest to United States by Continent | 0 | - | 4.99 | 146,717 |
| Countries that Beat the United States | 0 | - | 4.93 | 167,854 |
| Louisiana Purchase with a Map | 0 | - | 4.96 | 48,860 |
| US States with an Empty Map | 0 | - | 5.00 | 626,135 |
| Top 10 Most-Visited U.S. States | 0 | - | 4.90 | 101,958 |
| U.S. States with the Most Immigrants | 0 | - | 4.85 | 82,618 |
| U.S. States or European Countries by Area | 0 | - | 4.95 | 96,407 |
| U.S. States or European Countries by Population | 0 | - | 4.97 | 133,540 |
| Famous People from California by Picture | 0 | - | 4.32 | 36,540 |
| 10 Closest Megacities to New York City | 0 | - | 4.52 | 67,399 |
| Name a Valid U.S. State #1 | 0 | - | 4.93 | 209,513 |
| Top 10 Coldest U.S. States | 0 | - | 4.94 | 125,341 |
| Top 10 Hottest U.S. States | 0 | - | 4.86 | 125,979 |
| Top 10 Most Native American U.S. States | 0 | - | 4.87 | 92,362 |
| Top 10 U.S. States with the Least Precipitation | 0 | - | 4.82 | 62,019 |
| States of Mexico | 0 | - | 4.96 | 176,845 |
| Mexico States Map Quiz | 0 | - | 4.84 | 105,172 |
| Geography of California | 0 | - | 4.26 | 10,590 |
| Midwestern States of the U.S. | 0 | - | 4.88 | 13,927 |
| Mexico Cities Map Quiz | 0 | - | 4.83 | 38,691 |
| U.S. State Nicknames | 0 | - | 4.47 | 50,601 |
| Countries with American Expatriates | 0 | - | 4.53 | 42,618 |
| United States Landmarks Map Quiz | 0 | - | 4.55 | 40,218 |
| U.S. Cities by Picture #1 | 0 | - | 4.36 | 34,624 |
| Cities by Picture #2 | 0 | - | 4.19 | 35,186 |
| United States Country Quiz | 0 | - | 4.43 | 101,745 |
| Busiest Air Routes from the U.S. | 0 | - | 4.46 | 76,971 |
| California Groups of Things | 0 | - | 4.25 | 45,530 |
| Hawaiian Islands Map Quiz | 0 | - | 4.78 | 22,292 |
| New York Groups of Things | 0 | - | 4.35 | 63,961 |
| Most-Visited Countries by Canadians | 0 | - | 4.83 | 39,455 |
| Countries Closest to Canada | 0 | - | 4.91 | 198,619 |
| Asian Countries Americans Travel to the Most | 0 | - | 4.75 | 60,069 |
| U.S. Geography by Letter - B | 0 | - | 4.53 | 69,691 |
| U.S. Geography by Letter - S | 0 | - | 4.55 | 53,124 |
| Two Letter U.S. State Abbreviations | 0 | - | 4.19 | 748,121 |
| Countries Closest to the U. S. | 0 | - | 4.41 | 209,869 |
| American Geography Quiz for Dummies | 0 | - | 4.41 | 69,260 |
| U.S. Federal Agency Acronyms | 0 | - | 4.50 | 80,040 |
| Top 10 Non-English Languages of Los Angeles | 0 | - | 4.43 | 59,966 |
| Musical Acts from Los Angeles by Two Songs | 0 | - | 4.27 | 16,180 |
| Movies Set in San Francisco | 0 | - | 4.23 | 19,944 |
| Who Did that Motown Song? | 0 | - | 4.48 | 13,063 |
| New England States | 0 | - | 4.51 | 59,837 |
| U.S. States by Land Area | 0 | - | 4.63 | 52,903 |
| Top 10 U.S. States by Inland Water Area | 0 | - | 4.53 | 38,041 |
| Add a Letter - Make a U.S. State | 0 | - | 4.70 | 82,927 |
| Top 10 Widest U.S. States East to West | 0 | - | 4.70 | 56,124 |
| Top 10 Tallest U.S. States North to South | 0 | - | 4.74 | 41,011 |
| U.S. States by Borders | 0 | - | 4.61 | 35,381 |
| Save Americans by Guessing U.S. States | 0 | - | 4.63 | 186,553 |
| 10 Easternmost U.S. States | 0 | - | 4.53 | 56,549 |
| The Only U.S. State ... #1 | 0 | - | 4.52 | 102,150 |
| 50 States, 50 Cities - Hard Version | 0 | - | 4.46 | 44,277 |
| Countries that Beat Canada | 0 | - | 4.91 | 98,532 |
| Asian Last Names in the United States | 0 | - | 4.43 | 46,843 |
| United States Map Quiz | 0 | - | 4.98 | 4,163,902 |
| U.S. States by Picture #1 | 0 | - | 4.21 | 15,469 |
| Countries Closest to Alaska | 0 | - | 4.93 | 124,605 |
| Countries Closest to Maine | 0 | - | 4.85 | 67,257 |
| New York Pro Sport Teams | 0 | - | 4.32 | 25,923 |
| Washington State by Picture | 0 | - | 4.26 | 7,738 |
| Belize Country Quiz | 0 | - | 4.85 | 21,016 |
| Top U.S. Universities | 0 | - | 4.15 | 145,391 |
| Largest United States Airlines | 0 | - | 4.39 | 55,076 |
| 10 U.S. States With The Lowest Murder Rates | 0 | - | 4.48 | 52,175 |
| Biggest Trading Partners - United States | 0 | - | 4.63 | 106,737 |
| U.S. States by Governor | 0 | - | 4.43 | 18,079 |
| U.S. Political Parties in History | 0 | - | 4.44 | 27,717 |
| U.S. Political Figures by Picture #1 | 0 | - | 4.14 | 26,180 |
| U.S. Political Figures by Picture #2 | 0 | - | 4.10 | 15,541 |
| Female Political Figures by Picture - U.S. | 0 | - | 4.22 | 10,875 |
| U.S. Government Agencies | 0 | - | 4.44 | 19,712 |
| Famous People from Alabama by Picture | 0 | - | 4.07 | 24,088 |
| State Quiz - California | 0 | - | 4.69 | 64,571 |
| Los Angeles vs. New York | 0 | - | 4.41 | 19,935 |
| Florida Pro Sport Teams | 0 | - | 4.61 | 11,865 |
| Hawaiian Islands | 0 | - | 4.83 | 42,781 |
| Boston Talk to English Translation Quiz | 0 | - | 4.59 | 56,036 |
| Famous People from Michigan by Picture | 0 | - | 4.30 | 21,430 |
| Famous People from New York by Picture | 0 | - | 4.03 | 27,530 |
| Famous People from Texas by Picture | 0 | - | 3.99 | 33,398 |
| U.S. States that Border Tennessee | 0 | - | 4.83 | 65,389 |
| Events in U.S. History | 0 | - | 4.41 | 28,718 |
| U.S. History for Dummies | 0 | - | 4.47 | 83,207 |
| U.S. License Plates Picture Quiz | 0 | - | 4.61 | 52,997 |
| U.S. States with the Fewest Immigrants | 0 | - | 4.63 | 65,904 |
| U.S. States with the Highest Percentage of Farmland | 0 | - | 4.80 | 65,539 |
| U.S. States with the Lowest Percentage of Farmland | 0 | - | 4.74 | 55,251 |
| 10 U.S. States With The Highest Murder Rates | 0 | - | 4.47 | 54,555 |
| States and Provinces that touch the Rocky Mountains | 0 | - | 4.43 | 32,517 |
| Name a Valid U.S. State #2 | 0 | - | 4.63 | 77,160 |
| Walking Across U.S. State Borders with Hints | 0 | - | 4.74 | 35,075 |
| Name a Valid U.S. State #3 | 0 | - | 4.78 | 49,116 |
| U.S. States with the Longest International Borders | 0 | - | 4.78 | 45,853 |
| Longest U.S. State Borders | 0 | - | 4.67 | 39,939 |
| U.S. State Superlatives #1 | 0 | - | 4.47 | 87,584 |
| U.S. State Superlatives #2 | 0 | - | 4.53 | 40,676 |
| Top 10 U.S. States with the Highest Elevation | 0 | - | 4.51 | 67,912 |
| Top 10 U.S. States With the Most Tornadoes | 0 | - | 4.53 | 64,863 |
| Top 10 Least Religious U.S. States | 0 | - | 4.51 | 34,355 |
| Top 10 U.S. States by Public Transit | 0 | - | 4.77 | 63,868 |
| U.S. States with the Lowest Average Elevation | 0 | - | 4.55 | 38,529 |
| U.S. States With the Highest Average Elevation | 0 | - | 4.61 | 32,796 |
| Top 10 U.S. States with the Most Precipitation | 0 | - | 4.46 | 41,747 |
| U.S. States with the Fewest Borders | 0 | - | 4.78 | 113,995 |
| U.S. States with the Most Borders | 0 | - | 4.53 | 62,327 |
| Flags of Europe Quiz | 0 | - | 4.99 | 1,249,060 |
| Flags of Asia Quiz | 0 | - | 4.99 | 616,099 |
| Georgia ... or Georgia? | 0 | - | 4.67 | 76,879 |
| Flags of Africa Quiz | 0 | - | 5.00 | 473,427 |
| U.S. Geography by Letter - C | 0 | - | 4.27 | 74,299 |
| U.S. Geography by Letter - A | 0 | - | 4.37 | 63,321 |
| U.S. Geography by Letter - D | 0 | - | 4.09 | 57,289 |
| U.S. Geography by Letter - T | 0 | - | 4.29 | 50,001 |
| U.S. Geography by Letter - P | 0 | - | 4.38 | 54,143 |
| U.S. Geography by Letter - M | 0 | - | 4.14 | 53,482 |
| U.S. Geography by Letter - L | 0 | - | 4.04 | 41,323 |
| U.S. Geography by Letter - G | 0 | - | 4.13 | 39,490 |
| U.S. Geography by Letter - R | 0 | - | 4.22 | 35,630 |
| U.S. Geography By Letter - H | 0 | - | 4.35 | 40,363 |
| Third Most Common Language by U.S. State | 0 | - | 4.87 | 113,812 |
| American Legal Vocabulary | 0 | - | 4.40 | 33,962 |
| The U.S. Government - How Does it Work? | 0 | - | 4.34 | 42,401 |
| American Founding Fathers | 0 | - | 4.42 | 23,243 |
| ALL California Cities | 0 | - | 4.37 | 43,114 |
| Movies Set in Miami | 0 | - | 4.32 | 16,704 |
| People on Money - United States | 0 | - | 4.31 | 63,378 |
| U.S. History Groups of Two | 0 | - | 4.23 | 44,509 |
| 100 Most Influential Figures in U.S. History | 0 | - | 4.20 | 45,129 |
| Last 10 U.S. States Alphabetically | 0 | - | 4.35 | 74,926 |
| Top 10 Least Populous U.S. State Capitals | 0 | - | 4.52 | 21,540 |
| Flyover States | 0 | - | 4.52 | 29,538 |
| U.S. States With Double Letters | 0 | - | 4.55 | 24,176 |
| U.S. States Bigger than Their Neighbors | 0 | - | 4.28 | 76,263 |
| U.S. States by Wikipedia Descriptions #1 | 0 | - | 4.57 | 39,388 |
| U.S. States by Wikipedia Descriptions #2 | 0 | - | 4.48 | 37,137 |
| 50 States, 50 Cities - Easy Version | 0 | - | 4.39 | 128,491 |
| Top 10 Richest U.S. States by Median Income | 0 | - | 4.47 | 119,177 |
| Top 10 Least-Forested U.S. States | 0 | - | 4.50 | 46,570 |
| Flags of Oceania | 0 | - | 5.00 | 260,660 |
| The Only American Country ... | 0 | - | 4.92 | 121,837 |
| American Countries with the Shortest Names | 0 | - | 4.96 | 121,297 |
| U.S. State Border Crossings | 0 | - | 4.97 | 96,624 |
| U.S. Citizenship Test Questions | 0 | - | 4.83 | 239,768 |
| U.S. Cities with the Most International Tourists | 0 | - | 4.88 | 75,627 |
| Names of Generations | 0 | - | 4.09 | 45,220 |
| Cities and Towns of Massachusetts | 0 | - | 4.92 | 74,425 |
| Countries Larger Than Texas but With Fewer People | 0 | - | 4.92 | 40,043 |
| Regions of U.S. States | 0 | - | 4.37 | 43,996 |
| States, Provinces & Territories that Touch the Appalachian Mountains | 0 | - | 4.59 | 20,401 |
| 10 U.S. States with the Most Valuable Crops | 0 | - | 4.41 | 29,603 |
| U.S. States with the Lowest HDI | 0 | - | 4.47 | 28,880 |
| Which U.S. State - Multiple Choice | 0 | - | 4.48 | 20,322 |
| Movies by State | 0 | - | 4.27 | 40,566 |
| Canada Country Quiz | 0 | - | 4.54 | 132,689 |
| Canada Cities Map Quiz | 0 | - | 4.64 | 124,374 |
| Canada A-Z | 0 | - | 4.73 | 32,893 |
| Three Band Flags of Europe | 0 | - | 4.98 | 193,756 |
| Pixelated Europe Map | 0 | - | 4.88 | 123,019 |
| Pixelated Asia Map | 0 | - | 4.90 | 73,410 |
| Pixelated Africa Map | 0 | - | 4.98 | 100,092 |
| Top 10 American Countries by Coastline | 0 | - | 4.96 | 88,473 |
| Top 10 Richest Countries in the Americas | 0 | - | 4.93 | 84,497 |
| Top 10 Biggest Economies in the Americas | 0 | - | 4.94 | 92,400 |
| U.S. Geography by Letter - N | 0 | - | 3.80 | 52,915 |
| U.S. Geography by Letter - E | 0 | - | 3.75 | 48,935 |
| U.S. Geography by Letter - F | 0 | - | 3.84 | 45,197 |
| U.S. Geography by Letter - O | 0 | - | 3.52 | 41,660 |
| Mexico Country Quiz | 0 | - | 4.49 | 72,530 |
| All First-Level Subdivisions of South America on a Map | 0 | - | 4.92 | 54,210 |
| Brazil States Map Quiz | 0 | - | 4.86 | 48,263 |
| States of Brazil | 0 | - | 4.97 | 88,682 |
| Colombia Country Quiz | 0 | - | 4.90 | 40,812 |
