| Deadliest U.S. Wars | 0 | - | 4.89 | 189,648 |
| U.S. Cabinet Departments | 0 | - | 4.86 | 72,644 |
| Pixelated United States Map | 0 | - | 4.89 | 93,746 |
| US States Quiz | 0 | - | 5.00 | 16,762,285 |
| Name the U.S. National Parks | 0 | - | 4.86 | 59,495 |
| Total United States Immigration by Country | 0 | - | 4.91 | 110,943 |
| Most Common U.S. Last Names - Extreme | 0 | - | 4.94 | 173,644 |
| "Do Not Travel" Countries for U.S. Citizens | 0 | - | 4.97 | 241,970 |
| Top 10 Non-English Languages Spoken in New York City | 0 | - | 4.84 | 65,848 |
| States of the U.S. in Alphabetical Order | 0 | - | 4.98 | 365,964 |
| Top 10 Coldest U.S. States | 0 | - | 4.94 | 124,148 |
| Top 10 Hottest U.S. States | 0 | - | 4.86 | 125,000 |
| Top 10 U.S. States with the Least Precipitation | 0 | - | 4.82 | 61,667 |
| All 3,143 Counties of the United States on a Map | 0 | - | 4.97 | 329,371 |
| Most-Visited Countries by Americans | 0 | - | 4.87 | 108,894 |
| Countries that Visit the United States the Most | 0 | - | 4.96 | 91,170 |
| The 13 Colonies Quiz | 0 | - | 4.97 | 117,229 |
| U.S. States with the Letter Y | 0 | - | 4.85 | 110,819 |
| 10 Southernmost U.S. States | 0 | - | 4.88 | 112,815 |
| U.S. States with Short Names | 0 | - | 4.91 | 148,228 |
| U.S. States that Start with M | 0 | - | 4.93 | 186,467 |
| U.S. States By Population | 0 | - | 4.92 | 152,702 |
| U.S. States that Start with N | 0 | - | 4.95 | 170,792 |
| U.S. States with Longest Names | 0 | - | 4.84 | 44,104 |
| U.S. States with a Unique First Letter | 0 | - | 4.96 | 87,878 |
| 10 Westernmost U.S. States | 0 | - | 4.95 | 63,940 |
| The Only Remaining U.S. State . . . | 0 | - | 4.92 | 65,188 |
| US States with an Empty Map | 0 | - | 5.00 | 620,878 |
| Flags of North and South America | 0 | - | 4.99 | 369,528 |
| 10 Longest Rivers in the United States | 0 | - | 4.85 | 38,912 |
| Countries Closest to United States by Continent | 0 | - | 4.99 | 145,741 |
| Countries that Beat the United States | 0 | - | 4.93 | 166,034 |
| Louisiana Purchase with a Map | 0 | - | 4.96 | 47,986 |
| Top 10 Most-Visited U.S. States | 0 | - | 4.90 | 101,332 |
| U.S. States with the Most Immigrants | 0 | - | 4.85 | 82,139 |
| U.S. States or European Countries by Area | 0 | - | 4.95 | 95,196 |
| U.S. States or European Countries by Population | 0 | - | 4.97 | 132,386 |
| Name a Valid U.S. State #1 | 0 | - | 4.93 | 207,416 |
| Top 10 Most Native American U.S. States | 0 | - | 4.87 | 91,430 |
| U.S. Federal Agency Acronyms | 0 | - | 4.50 | 79,825 |
| Top 10 Biggest Economies in the Americas | 0 | - | 4.93 | 91,372 |
| States of Mexico | 0 | - | 4.95 | 174,354 |
| Mexico States Map Quiz | 0 | - | 4.84 | 104,106 |
| Top U.S. Universities | 0 | - | 4.15 | 144,431 |
| 10 U.S. States With The Lowest Murder Rates | 0 | - | 4.51 | 41,445 |
| Biggest Trading Partners - United States | 0 | - | 4.63 | 106,467 |
| U.S. States by Governor | 0 | - | 4.43 | 18,007 |
| U.S. Political Parties in History | 0 | - | 4.44 | 27,610 |
| U.S. Government Agencies | 0 | - | 4.44 | 19,591 |
| 10 U.S. States With The Highest Murder Rates | 0 | - | 4.47 | 53,509 |
| U.S. State Superlatives #1 | 0 | - | 4.47 | 87,355 |
| U.S. State Superlatives #2 | 0 | - | 4.53 | 40,531 |
| Top 10 U.S. States With the Most Tornadoes | 0 | - | 4.53 | 64,571 |
| Top 10 Least Religious U.S. States | 0 | - | 4.51 | 34,172 |
| Top 10 U.S. States by Public Transit | 0 | - | 4.77 | 63,538 |
| Top 10 U.S. States with the Most Precipitation | 0 | - | 4.46 | 41,617 |
| Top 10 Richest Countries in the Americas | 0 | - | 4.93 | 81,267 |
| U.S. State Nicknames | 0 | - | 4.47 | 50,368 |
| Countries with American Expatriates | 0 | - | 4.53 | 42,507 |
| U.S. Five-Star Generals and Admirals | 0 | - | 4.33 | 8,312 |
| United States Landmarks Map Quiz | 0 | - | 4.55 | 40,118 |
| U.S. Cities by Picture #1 | 0 | - | 4.36 | 34,419 |
| Cities by Picture #2 | 0 | - | 4.19 | 34,994 |
| United States Country Quiz | 0 | - | 4.43 | 100,942 |
| Busiest Air Routes from the U.S. | 0 | - | 4.46 | 76,705 |
| 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 |
| The U.S. Government - How Does it Work? | 0 | - | 4.34 | 42,246 |
| 100 Most Influential Figures in U.S. History | 0 | - | 4.20 | 44,799 |
| Most-Visited Countries by Canadians | 0 | - | 4.82 | 39,155 |
| Countries Closest to Canada | 0 | - | 4.90 | 197,638 |
| Asian Countries Americans Travel to the Most | 0 | - | 4.75 | 59,762 |
| U.S. Geography by Letter - B | 0 | - | 4.53 | 68,944 |
| U.S. Geography by Letter - S | 0 | - | 4.55 | 52,429 |
| Two Letter U.S. State Abbreviations | 0 | - | 4.19 | 744,765 |
| Most Guessed U.S. Cities | 0 | - | 4.89 | 105,354 |
| U.S. Cities with the Biggest Economies | 0 | - | 4.84 | 72,349 |
| Countries Closest to the U. S. | 0 | - | 4.41 | 208,330 |
| 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 |
| New England States | 0 | - | 4.51 | 59,738 |
| U.S. States by Land Area | 0 | - | 4.61 | 52,604 |
| Top 10 U.S. States by Inland Water Area | 0 | - | 4.53 | 37,937 |
| Add a Letter - Make a U.S. State | 0 | - | 4.72 | 82,522 |
| Top 10 Widest U.S. States East to West | 0 | - | 4.70 | 55,791 |
| Top 10 Tallest U.S. States North to South | 0 | - | 4.74 | 40,764 |
| U.S. States by Borders | 0 | - | 4.63 | 35,168 |
| U.S. States by Wikipedia Descriptions #1 | 0 | - | 4.57 | 39,256 |
| U.S. States by Wikipedia Descriptions #2 | 0 | - | 4.47 | 37,011 |
| 10 Easternmost U.S. States | 0 | - | 4.53 | 56,341 |
| The Only U.S. State ... #1 | 0 | - | 4.52 | 101,737 |
| 50 States, 50 Cities - Hard Version | 0 | - | 4.46 | 44,064 |
| Top 10 Richest U.S. States by Median Income | 0 | - | 4.47 | 118,676 |
| Canadian Prime Ministers | 0 | - | 4.63 | 57,240 |
| Asian Last Names in the United States | 0 | - | 4.43 | 46,583 |
| United States Map Quiz | 0 | - | 4.98 | 4,146,927 |
| U.S. States by Picture #1 | 0 | - | 4.21 | 15,383 |
| Senators Who Ran For President | 0 | - | 4.24 | 17,007 |
| U.S. Electoral College Landslides | 0 | - | 4.35 | 22,010 |
| Washington State by Picture | 0 | - | 4.26 | 7,701 |
| U.S. License Plates Picture Quiz | 0 | - | 4.59 | 52,742 |
| U.S. States with the Fewest Immigrants | 0 | - | 4.63 | 65,556 |
| U.S. States with the Highest Percentage of Farmland | 0 | - | 4.80 | 65,351 |
| U.S. States with the Lowest Percentage of Farmland | 0 | - | 4.74 | 55,090 |
| U.S. States with the Longest International Borders | 0 | - | 4.78 | 45,667 |
| Longest U.S. State Borders | 0 | - | 4.67 | 39,545 |
| Top 10 U.S. States with the Highest Elevation | 0 | - | 4.51 | 67,811 |
| 10 U.S. States with the Highest Tax Burden | 0 | - | 4.26 | 38,101 |
| Top 10 U.S. States by Manufacturing Employment | 0 | - | 4.49 | 28,771 |
| U.S. States with the Lowest Average Elevation | 0 | - | 4.55 | 38,428 |
| U.S. States With the Highest Average Elevation | 0 | - | 4.61 | 32,698 |
| U.S. States with the Fewest Borders | 0 | - | 4.77 | 113,209 |
| U.S. States with the Most Borders | 0 | - | 4.53 | 62,257 |
| U.S. States With No City Over 100,000 | 0 | - | 4.57 | 17,882 |
| Flags of Africa Quiz | 0 | - | 5.00 | 466,004 |
| Belize Country Quiz | 0 | - | 4.85 | 20,862 |
| Largest United States Airlines | 0 | - | 4.39 | 54,905 |
| Third Most Common Language by U.S. State | 0 | - | 4.87 | 113,504 |
| Countries Closest to United States A-Z | 0 | - | 4.82 | 117,733 |
| Florida Pro Sport Teams | 0 | - | 4.61 | 11,782 |
| Flags of Europe Quiz | 0 | - | 4.99 | 1,232,938 |
| Flags of Asia Quiz | 0 | - | 4.99 | 608,195 |
| Georgia ... or Georgia? | 0 | - | 4.67 | 76,565 |
| 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 | 56,668 |
| U.S. Geography by Letter - T | 0 | - | 4.29 | 49,337 |
| U.S. Geography by Letter - P | 0 | - | 4.36 | 47,782 |
| U.S. Geography by Letter - M | 0 | - | 4.14 | 52,930 |
| U.S. Geography by Letter - L | 0 | - | 4.04 | 40,772 |
| U.S. Geography by Letter - G | 0 | - | 4.13 | 38,908 |
| U.S. Geography By Letter - H | 0 | - | 4.35 | 39,695 |
| American Legal Vocabulary | 0 | - | 4.40 | 33,833 |
| American Founding Fathers | 0 | - | 4.41 | 23,096 |
| Famous People from California by Picture | 0 | - | 4.32 | 36,259 |
| California Groups of Things | 0 | - | 4.25 | 45,328 |
| Hawaiian Islands Map Quiz | 0 | - | 4.78 | 22,220 |
| New York Groups of Things | 0 | - | 4.38 | 60,012 |
| People on Money - United States | 0 | - | 4.31 | 63,251 |
| U.S. History Groups of Two | 0 | - | 4.23 | 44,322 |
| The American Civil War | 0 | - | 4.62 | 52,251 |
| Last 10 U.S. States Alphabetically | 0 | - | 4.35 | 74,688 |
| Top 10 Least Populous U.S. State Capitals | 0 | - | 4.52 | 21,481 |
| Flyover States | 0 | - | 4.52 | 29,438 |
| U.S. States With Double Letters | 0 | - | 4.54 | 23,993 |
| U.S. States Bigger than Their Neighbors | 0 | - | 4.27 | 75,945 |
| States and Provinces that touch the Rocky Mountains | 0 | - | 4.42 | 32,442 |
| Name a Valid U.S. State #2 | 0 | - | 4.63 | 76,657 |
| Name a Valid U.S. State #3 | 0 | - | 4.78 | 48,818 |
| 50 States, 50 Cities - Easy Version | 0 | - | 4.39 | 128,124 |
| Top 10 Least-Forested U.S. States | 0 | - | 4.50 | 46,389 |
| Famous Canadians by Picture | 0 | - | 4.39 | 49,210 |
| Pixelated Africa Map | 0 | - | 4.98 | 99,335 |
| Flags of Oceania | 0 | - | 5.00 | 256,560 |
| The Only American Country ... | 0 | - | 4.92 | 121,096 |
| American Countries with the Shortest Names | 0 | - | 4.96 | 120,661 |
| U.S. State Border Crossings | 0 | - | 4.97 | 96,152 |
| U.S. Citizenship Test Questions | 0 | - | 4.83 | 238,710 |
| U.S. Cities with the Most International Tourists | 0 | - | 4.88 | 75,108 |
| Cities and Towns of Massachusetts | 0 | - | 4.92 | 73,363 |
| Who Did that Motown Song? | 0 | - | 4.48 | 13,032 |
| Countries Larger Than Texas but With Fewer People | 0 | - | 4.92 | 39,649 |
| Regions of U.S. States | 0 | - | 4.37 | 43,615 |
| 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 | - | 4.46 | 28,805 |
| Which U.S. State - Multiple Choice | 0 | - | 4.48 | 20,231 |
| Movies by State | 0 | - | 4.27 | 40,481 |
| U.S. States with the Fewest Traffic Fatalities | 0 | - | 4.20 | 21,091 |
| U.S. States with the Most Traffic Fatalities | 0 | - | 4.10 | 19,077 |
| Canada Country Quiz | 0 | - | 4.55 | 132,003 |
| Canada Cities Map Quiz | 0 | - | 4.63 | 123,816 |
| Canada A-Z | 0 | - | 4.73 | 32,707 |
| Three Band Flags of Europe | 0 | - | 4.98 | 192,364 |
| Catholic Countries in Europe | 0 | - | 4.83 | 94,512 |
| Pixelated Europe Map | 0 | - | 4.88 | 122,147 |
| Monarchies of Europe | 0 | - | 4.90 | 97,613 |
| Pixelated Asia Map | 0 | - | 4.90 | 72,711 |
| Monarchies of Asia | 0 | - | 4.97 | 70,775 |
| Asian Country Superlatives | 0 | - | 4.83 | 80,578 |
| Battle to Country | 0 | - | 4.91 | 52,814 |
| Top 10 Biggest Economies in Africa | 0 | - | 4.99 | 119,684 |
| Category Elimination - African Geography #1 | 0 | - | 4.90 | 91,484 |
| Mexico Country Quiz | 0 | - | 4.49 | 72,148 |
| Mexico Cities Map Quiz | 0 | - | 4.77 | 33,362 |
| All First-Level Subdivisions of South America on a Map | 0 | - | 4.92 | 53,297 |
| Brazil States Map Quiz | 0 | - | 4.85 | 47,591 |
| States of Brazil | 0 | - | 4.97 | 86,941 |
| Fictional Characters from the Midwest by Picture | 0 | - | 4.04 | 19,167 |
| U.S. States by Picture #2 | 0 | - | 3.47 | 11,523 |
| U.S. Cities with the Highest Murder Rate | 0 | - | 4.55 | 138,035 |
| Most-Visited U.S. Cities | 0 | - | 4.85 | 92,876 |
| Every U.S. Metro Area on a Map | 0 | - | 4.97 | 81,149 |
| Richest Metro Areas in the U.S. | 0 | - | 4.42 | 43,387 |
| Politicians with Other Careers | 0 | - | 3.98 | 15,000 |
| Main Parts of the U.S. Budget | 0 | - | 3.45 | 8,690 |
| Geography of California | 0 | - | 4.25 | 10,522 |
| California Pro Sport Teams | 0 | - | 4.19 | 22,662 |
| Chicago City Trivia | 0 | - | 4.31 | 31,405 |
