| Pixelated United States Map | 0 | - | 4.89 | 93,749 |
| US States Quiz | 0 | - | 5.00 | 16,763,048 |
| States of the U.S. in Alphabetical Order | 0 | - | 4.98 | 365,976 |
| Name the U.S. National Parks | 0 | - | 4.86 | 59,496 |
| Total United States Immigration by Country | 0 | - | 4.91 | 110,948 |
| Most Common U.S. Last Names - Extreme | 0 | - | 4.94 | 173,651 |
| "Do Not Travel" Countries for U.S. Citizens | 0 | - | 4.97 | 241,987 |
| U.S. Cabinet Departments | 0 | - | 4.86 | 72,646 |
| Top 10 Non-English Languages Spoken in New York City | 0 | - | 4.84 | 65,851 |
| All 3,143 Counties of the United States on a Map | 0 | - | 4.97 | 329,400 |
| Most-Visited Countries by Americans | 0 | - | 4.87 | 108,898 |
| Countries that Visit the United States the Most | 0 | - | 4.96 | 91,172 |
| Deadliest U.S. Wars | 0 | - | 4.89 | 189,652 |
| The 13 Colonies Quiz | 0 | - | 4.97 | 117,238 |
| U.S. States with the Letter Y | 0 | - | 4.85 | 110,831 |
| 10 Southernmost U.S. States | 0 | - | 4.88 | 112,821 |
| U.S. States with Short Names | 0 | - | 4.91 | 148,237 |
| U.S. States that Start with M | 0 | - | 4.93 | 186,473 |
| U.S. States By Population | 0 | - | 4.92 | 152,717 |
| U.S. States that Start with N | 0 | - | 4.95 | 170,802 |
| U.S. States with Longest Names | 0 | - | 4.84 | 44,112 |
| U.S. States with a Unique First Letter | 0 | - | 4.96 | 87,883 |
| 10 Westernmost U.S. States | 0 | - | 4.95 | 63,944 |
| The Only Remaining U.S. State . . . | 0 | - | 4.92 | 65,194 |
| Flags of North and South America | 0 | - | 4.99 | 369,561 |
| 10 Longest Rivers in the United States | 0 | - | 4.85 | 38,912 |
| Countries Closest to United States by Continent | 0 | - | 4.99 | 145,747 |
| Countries that Beat the United States | 0 | - | 4.93 | 166,042 |
| Louisiana Purchase with a Map | 0 | - | 4.96 | 47,992 |
| US States with an Empty Map | 0 | - | 5.00 | 620,891 |
| Top 10 Most-Visited U.S. States | 0 | - | 4.90 | 101,335 |
| U.S. States with the Most Immigrants | 0 | - | 4.85 | 82,144 |
| U.S. States or European Countries by Area | 0 | - | 4.95 | 95,199 |
| U.S. States or European Countries by Population | 0 | - | 4.97 | 132,388 |
| Famous People from California by Picture | 0 | - | 4.32 | 36,259 |
| Top 10 Non-English Languages of Los Angeles | 0 | - | 4.42 | 59,701 |
| 10 Closest Megacities to New York City | 0 | - | 4.52 | 67,236 |
| Name a Valid U.S. State #1 | 0 | - | 4.93 | 207,422 |
| Top 10 Coldest U.S. States | 0 | - | 4.94 | 124,154 |
| Top 10 Hottest U.S. States | 0 | - | 4.86 | 125,004 |
| Top 10 Most Native American U.S. States | 0 | - | 4.87 | 91,436 |
| Top 10 U.S. States with the Least Precipitation | 0 | - | 4.82 | 61,667 |
| Musical Acts from Los Angeles by Two Songs | 0 | - | 4.27 | 15,939 |
| States of Mexico | 0 | - | 4.95 | 174,374 |
| Mexico States Map Quiz | 0 | - | 4.84 | 104,107 |
| Geography of California | 0 | - | 4.25 | 10,522 |
| U.S. State Nicknames | 0 | - | 4.47 | 50,371 |
| Countries with American Expatriates | 0 | - | 4.53 | 42,507 |
| United States Landmarks Map Quiz | 0 | - | 4.55 | 40,118 |
| U.S. Cities by Picture #1 | 0 | - | 4.36 | 34,420 |
| Cities by Picture #2 | 0 | - | 4.19 | 34,995 |
| United States Country Quiz | 0 | - | 4.43 | 100,944 |
| Busiest Air Routes from the U.S. | 0 | - | 4.46 | 76,705 |
| California Groups of Things | 0 | - | 4.25 | 45,330 |
| Los Angeles vs. New York | 0 | - | 4.41 | 19,731 |
| Hawaiian Islands Map Quiz | 0 | - | 4.78 | 22,220 |
| New York Groups of Things | 0 | - | 4.38 | 60,012 |
| Most-Visited Countries by Canadians | 0 | - | 4.82 | 39,155 |
| Countries Closest to Canada | 0 | - | 4.90 | 197,643 |
| Asian Countries Americans Travel to the Most | 0 | - | 4.75 | 59,764 |
| U.S. Geography by Letter - B | 0 | - | 4.53 | 68,945 |
| U.S. Geography by Letter - S | 0 | - | 4.55 | 52,429 |
| Two Letter U.S. State Abbreviations | 0 | - | 4.19 | 744,809 |
| Countries Closest to the U. S. | 0 | - | 4.41 | 208,335 |
| U.S. Federal Agency Acronyms | 0 | - | 4.50 | 79,826 |
| Movies Set in San Francisco | 0 | - | 4.23 | 19,921 |
| Who Did that Motown Song? | 0 | - | 4.48 | 13,032 |
| New England States | 0 | - | 4.51 | 59,742 |
| U.S. States by Land Area | 0 | - | 4.61 | 52,605 |
| Top 10 U.S. States by Inland Water Area | 0 | - | 4.53 | 37,938 |
| Add a Letter - Make a U.S. State | 0 | - | 4.72 | 82,523 |
| Top 10 Widest U.S. States East to West | 0 | - | 4.70 | 55,792 |
| Top 10 Tallest U.S. States North to South | 0 | - | 4.74 | 40,766 |
| U.S. States by Borders | 0 | - | 4.63 | 35,169 |
| 10 Easternmost U.S. States | 0 | - | 4.53 | 56,342 |
| The Only U.S. State ... #1 | 0 | - | 4.52 | 101,746 |
| 50 States, 50 Cities - Hard Version | 0 | - | 4.46 | 44,067 |
| Countries that Beat Canada | 0 | - | 4.90 | 87,076 |
| Asian Last Names in the United States | 0 | - | 4.43 | 46,585 |
| United States Map Quiz | 0 | - | 4.98 | 4,147,007 |
| U.S. States by Picture #1 | 0 | - | 4.21 | 15,383 |
| Countries Closest to Alaska | 0 | - | 4.93 | 123,707 |
| Countries Closest to Maine | 0 | - | 4.84 | 66,697 |
| New York Pro Sport Teams | 0 | - | 4.32 | 25,830 |
| Washington State by Picture | 0 | - | 4.26 | 7,702 |
| Georgia ... or Georgia? | 0 | - | 4.67 | 76,565 |
| Flags of Africa Quiz | 0 | - | 5.00 | 466,042 |
| Belize Country Quiz | 0 | - | 4.85 | 20,863 |
| Top U.S. Universities | 0 | - | 4.15 | 144,432 |
| Largest United States Airlines | 0 | - | 4.39 | 54,906 |
| 10 U.S. States With The Lowest Murder Rates | 0 | - | 4.51 | 41,456 |
| Biggest Trading Partners - United States | 0 | - | 4.63 | 106,467 |
| U.S. States by Governor | 0 | - | 4.43 | 18,008 |
| U.S. Political Parties in History | 0 | - | 4.44 | 27,610 |
| U.S. Political Figures by Picture #1 | 0 | - | 4.14 | 26,104 |
| U.S. Political Figures by Picture #2 | 0 | - | 4.10 | 15,482 |
| Female Political Figures by Picture - U.S. | 0 | - | 4.20 | 10,827 |
| U.S. Government Agencies | 0 | - | 4.44 | 19,591 |
| Famous People from Alabama by Picture | 0 | - | 4.07 | 23,992 |
| State Quiz - California | 0 | - | 4.68 | 64,144 |
| Florida Pro Sport Teams | 0 | - | 4.61 | 11,782 |
| Hawaiian Islands | 0 | - | 4.83 | 42,537 |
| Boston Talk to English Translation Quiz | 0 | - | 4.59 | 55,810 |
| Famous People from Michigan by Picture | 0 | - | 4.30 | 21,331 |
| Famous People from New York by Picture | 0 | - | 4.03 | 27,400 |
| Famous People from Texas by Picture | 0 | - | 3.99 | 33,303 |
| U.S. States that Border Tennessee | 0 | - | 4.83 | 65,189 |
| U.S. License Plates Picture Quiz | 0 | - | 4.59 | 52,743 |
| U.S. States with the Fewest Immigrants | 0 | - | 4.63 | 65,557 |
| U.S. States with the Highest Percentage of Farmland | 0 | - | 4.80 | 65,354 |
| U.S. States with the Lowest Percentage of Farmland | 0 | - | 4.74 | 55,090 |
| 10 U.S. States With The Highest Murder Rates | 0 | - | 4.47 | 53,518 |
| States and Provinces that touch the Rocky Mountains | 0 | - | 4.42 | 32,443 |
| Name a Valid U.S. State #2 | 0 | - | 4.63 | 76,658 |
| Walking Across U.S. State Borders with Hints | 0 | - | 4.74 | 34,964 |
| Name a Valid U.S. State #3 | 0 | - | 4.78 | 48,818 |
| U.S. States with the Longest International Borders | 0 | - | 4.78 | 45,668 |
| Longest U.S. State Borders | 0 | - | 4.67 | 39,548 |
| U.S. State Superlatives #1 | 0 | - | 4.47 | 87,356 |
| U.S. State Superlatives #2 | 0 | - | 4.53 | 40,531 |
| Top 10 U.S. States with the Highest Elevation | 0 | - | 4.51 | 67,811 |
| Top 10 U.S. States With the Most Tornadoes | 0 | - | 4.53 | 64,572 |
| Top 10 Least Religious U.S. States | 0 | - | 4.51 | 34,172 |
| Top 10 U.S. States by Public Transit | 0 | - | 4.77 | 63,541 |
| U.S. States with the Lowest Average Elevation | 0 | - | 4.55 | 38,428 |
| U.S. States With the Highest Average Elevation | 0 | - | 4.61 | 32,699 |
| Top 10 U.S. States with the Most Precipitation | 0 | - | 4.46 | 41,617 |
| U.S. States with the Fewest Borders | 0 | - | 4.77 | 113,210 |
| U.S. States with the Most Borders | 0 | - | 4.53 | 62,259 |
| Flags of Europe Quiz | 0 | - | 4.99 | 1,232,996 |
| Flags of Asia Quiz | 0 | - | 4.99 | 608,242 |
| U.S. Geography by Letter - C | 0 | - | 4.27 | 73,711 |
| U.S. Geography by Letter - A | 0 | - | 4.38 | 62,672 |
| U.S. Geography by Letter - D | 0 | - | 4.08 | 56,669 |
| U.S. Geography by Letter - T | 0 | - | 4.29 | 49,338 |
| U.S. Geography by Letter - P | 0 | - | 4.36 | 47,783 |
| U.S. Geography by Letter - M | 0 | - | 4.14 | 52,930 |
| U.S. Geography by Letter - L | 0 | - | 4.04 | 40,775 |
| U.S. Geography by Letter - G | 0 | - | 4.13 | 38,911 |
| U.S. Geography By Letter - H | 0 | - | 4.35 | 39,697 |
| Third Most Common Language by U.S. State | 0 | - | 4.87 | 113,506 |
| American Legal Vocabulary | 0 | - | 4.40 | 33,833 |
| The U.S. Government - How Does it Work? | 0 | - | 4.34 | 42,246 |
| American Founding Fathers | 0 | - | 4.42 | 23,096 |
| ALL California Cities | 0 | - | 4.37 | 42,920 |
| Movies Set in Miami | 0 | - | 4.32 | 16,683 |
| People on Money - United States | 0 | - | 4.31 | 63,252 |
| U.S. History Groups of Two | 0 | - | 4.23 | 44,323 |
| 100 Most Influential Figures in U.S. History | 0 | - | 4.20 | 44,799 |
| Last 10 U.S. States Alphabetically | 0 | - | 4.35 | 74,689 |
| Top 10 Least Populous U.S. State Capitals | 0 | - | 4.52 | 21,482 |
| Flyover States | 0 | - | 4.52 | 29,439 |
| U.S. States With Double Letters | 0 | - | 4.54 | 23,993 |
| U.S. States Bigger than Their Neighbors | 0 | - | 4.27 | 75,945 |
| U.S. States by Wikipedia Descriptions #1 | 0 | - | 4.57 | 39,256 |
| U.S. States by Wikipedia Descriptions #2 | 0 | - | 4.47 | 37,012 |
| 50 States, 50 Cities - Easy Version | 0 | - | 4.39 | 128,127 |
| Top 10 Richest U.S. States by Median Income | 0 | - | 4.47 | 118,678 |
| Top 10 Least-Forested U.S. States | 0 | - | 4.50 | 46,391 |
| Pixelated Africa Map | 0 | - | 4.98 | 99,339 |
| Flags of Oceania | 0 | - | 5.00 | 256,575 |
| The Only American Country ... | 0 | - | 4.92 | 121,100 |
| American Countries with the Shortest Names | 0 | - | 4.96 | 120,665 |
| U.S. State Border Crossings | 0 | - | 4.97 | 96,154 |
| U.S. Citizenship Test Questions | 0 | - | 4.83 | 238,719 |
| U.S. Cities with the Most International Tourists | 0 | - | 4.88 | 75,110 |
| Cities and Towns of Massachusetts | 0 | - | 4.92 | 73,368 |
| Countries Larger Than Texas but With Fewer People | 0 | - | 4.92 | 39,650 |
| Regions of U.S. States | 0 | - | 4.37 | 43,618 |
| States, Provinces & Territories that Touch the Appalachian Mountains | 0 | - | 4.59 | 20,353 |
| 10 U.S. States with the Most Valuable Crops | 0 | - | 4.41 | 29,517 |
| U.S. States with the Lowest HDI | 0 | - | 4.47 | 28,805 |
| Which U.S. State - Multiple Choice | 0 | - | 4.48 | 20,231 |
| Movies by State | 0 | - | 4.27 | 40,483 |
| Canada Country Quiz | 0 | - | 4.55 | 132,010 |
| Canada Cities Map Quiz | 0 | - | 4.63 | 123,818 |
| Canada A-Z | 0 | - | 4.73 | 32,707 |
| Three Band Flags of Europe | 0 | - | 4.98 | 192,371 |
| Pixelated Europe Map | 0 | - | 4.88 | 122,151 |
| Pixelated Asia Map | 0 | - | 4.90 | 72,715 |
| Top 10 American Countries by Coastline | 0 | - | 4.96 | 88,176 |
| Top 10 Richest Countries in the Americas | 0 | - | 4.93 | 81,303 |
| Top 10 Biggest Economies in the Americas | 0 | - | 4.93 | 91,374 |
| U.S. Geography by Letter - N | 0 | - | 3.79 | 52,470 |
| U.S. Geography by Letter - E | 0 | - | 3.75 | 48,473 |
| U.S. Geography by Letter - F | 0 | - | 3.87 | 44,736 |
| U.S. Geography by Letter - O | 0 | - | 3.52 | 41,092 |
| U.S. Geography by Letter - R | 0 | - | 4.18 | 30,596 |
| Mexico Country Quiz | 0 | - | 4.49 | 72,150 |
| Mexico Cities Map Quiz | 0 | - | 4.77 | 33,363 |
| All First-Level Subdivisions of South America on a Map | 0 | - | 4.92 | 53,305 |
| Brazil States Map Quiz | 0 | - | 4.85 | 47,595 |
| States of Brazil | 0 | - | 4.97 | 86,954 |
| Colombia Country Quiz | 0 | - | 4.90 | 40,475 |
| 15 Largest Cities in North America With a Map | 0 | - | 4.98 | 46,729 |
| 100 Biggest Cities in North America on a Map | 0 | - | 4.84 | 61,783 |
| Fictional Characters from the Midwest by Picture | 0 | - | 4.04 | 19,167 |
| Biggest Cities in the U.S. - Extreme | 0 | - | 4.96 | 158,633 |
| U.S. Five-Star Generals and Admirals | 0 | - | 4.33 | 8,313 |
| Biggest Cities in Each U.S. State - Extreme | 0 | - | 4.93 | 78,960 |
