| US States Quiz | 0 | - | 5.00 | 16,754,451 |
| Name the U.S. National Parks | 0 | - | 4.86 | 59,463 |
| Total United States Immigration by Country | 0 | - | 4.91 | 110,902 |
| Most Common U.S. Last Names - Extreme | 0 | - | 4.94 | 173,593 |
| "Do Not Travel" Countries for U.S. Citizens | 0 | - | 4.97 | 241,834 |
| U.S. Cabinet Departments | 0 | - | 4.86 | 72,620 |
| Top 10 Non-English Languages Spoken in New York City | 0 | - | 4.84 | 65,828 |
| States of the U.S. in Alphabetical Order | 0 | - | 4.98 | 365,857 |
| All 3,143 Counties of the United States on a Map | 0 | - | 4.97 | 329,242 |
| Pixelated United States Map | 0 | - | 4.89 | 93,715 |
| Most-Visited Countries by Americans | 0 | - | 4.87 | 108,834 |
| Countries that Visit the United States the Most | 0 | - | 4.96 | 91,133 |
| Deadliest U.S. Wars | 0 | - | 4.89 | 189,604 |
| The 13 Colonies Quiz | 0 | - | 4.97 | 117,159 |
| U.S. States with the Letter Y | 0 | - | 4.85 | 110,765 |
| 10 Southernmost U.S. States | 0 | - | 4.88 | 112,776 |
| U.S. States with Short Names | 0 | - | 4.91 | 148,151 |
| U.S. States that Start with M | 0 | - | 4.93 | 186,401 |
| U.S. States By Population | 0 | - | 4.92 | 152,664 |
| U.S. States that Start with N | 0 | - | 4.95 | 170,739 |
| U.S. States with Longest Names | 0 | - | 4.84 | 44,073 |
| U.S. States with a Unique First Letter | 0 | - | 4.96 | 87,829 |
| 10 Westernmost U.S. States | 0 | - | 4.95 | 63,919 |
| The Only Remaining U.S. State . . . | 0 | - | 4.92 | 65,147 |
| US States with an Empty Map | 0 | - | 5.00 | 620,638 |
| 10 Longest Rivers in the United States | 0 | - | 4.85 | 38,900 |
| Countries Closest to United States by Continent | 0 | - | 4.99 | 145,706 |
| Countries that Beat the United States | 0 | - | 4.93 | 165,971 |
| Louisiana Purchase with a Map | 0 | - | 4.96 | 47,948 |
| Top 10 Most-Visited U.S. States | 0 | - | 4.90 | 101,285 |
| U.S. States with the Most Immigrants | 0 | - | 4.85 | 82,110 |
| U.S. States or European Countries by Area | 0 | - | 4.95 | 95,141 |
| U.S. States or European Countries by Population | 0 | - | 4.97 | 132,346 |
| Countries With The Most Bird Species | 0 | - | 4.93 | 32,602 |
| Name a Valid U.S. State #1 | 0 | - | 4.93 | 207,338 |
| Top 10 Coldest U.S. States | 0 | - | 4.94 | 124,118 |
| Top 10 Hottest U.S. States | 0 | - | 4.86 | 124,960 |
| Top 10 Most Native American U.S. States | 0 | - | 4.87 | 91,390 |
| Top 10 U.S. States with the Least Precipitation | 0 | - | 4.82 | 61,654 |
| States of Mexico | 0 | - | 4.95 | 174,204 |
| Mexico States Map Quiz | 0 | - | 4.84 | 104,073 |
| U.S. State Nicknames | 0 | - | 4.47 | 50,358 |
| Countries with American Expatriates | 0 | - | 4.53 | 42,502 |
| United States Landmarks Map Quiz | 0 | - | 4.55 | 40,111 |
| United States Country Quiz | 0 | - | 4.43 | 100,901 |
| Busiest Air Routes from the U.S. | 0 | - | 4.46 | 76,699 |
| Most-Visited Countries by Canadians | 0 | - | 4.82 | 39,145 |
| Countries Closest to Canada | 0 | - | 4.90 | 197,600 |
| Asian Countries Americans Travel to the Most | 0 | - | 4.75 | 59,746 |
| U.S. Geography by Letter - B | 0 | - | 4.53 | 68,929 |
| U.S. Geography by Letter - S | 0 | - | 4.55 | 52,416 |
| Two Letter U.S. State Abbreviations | 0 | - | 4.19 | 744,556 |
| Countries Closest to the U. S. | 0 | - | 4.41 | 208,264 |
| American Geography Quiz for Dummies | 0 | - | 4.41 | 68,865 |
| U.S. Federal Agency Acronyms | 0 | - | 4.50 | 79,813 |
| Top 10 Non-English Languages of Los Angeles | 0 | - | 4.42 | 59,689 |
| 10 Closest Megacities to New York City | 0 | - | 4.52 | 67,229 |
| New England States | 0 | - | 4.51 | 59,736 |
| U.S. States by Land Area | 0 | - | 4.61 | 52,588 |
| Top 10 U.S. States by Inland Water Area | 0 | - | 4.53 | 37,929 |
| Add a Letter - Make a U.S. State | 0 | - | 4.72 | 82,494 |
| Top 10 Widest U.S. States East to West | 0 | - | 4.70 | 55,768 |
| Top 10 Tallest U.S. States North to South | 0 | - | 4.74 | 40,746 |
| U.S. States by Borders | 0 | - | 4.63 | 35,157 |
| 10 Easternmost U.S. States | 0 | - | 4.53 | 56,323 |
| The Only U.S. State ... #1 | 0 | - | 4.52 | 101,694 |
| 50 States, 50 Cities - Hard Version | 0 | - | 4.46 | 44,057 |
| Countries that Beat Canada | 0 | - | 4.90 | 87,050 |
| Asian Last Names in the United States | 0 | - | 4.43 | 46,579 |
| United States Map Quiz | 0 | - | 4.98 | 4,146,371 |
| U.S. History for Dummies | 0 | - | 4.47 | 82,655 |
| U.S. License Plates Picture Quiz | 0 | - | 4.59 | 52,730 |
| U.S. States with the Fewest Immigrants | 0 | - | 4.63 | 65,547 |
| U.S. States with the Highest Percentage of Farmland | 0 | - | 4.80 | 65,340 |
| U.S. States with the Lowest Percentage of Farmland | 0 | - | 4.74 | 55,081 |
| Walking Across U.S. State Borders with Hints | 0 | - | 4.74 | 34,960 |
| U.S. States with the Longest International Borders | 0 | - | 4.78 | 45,662 |
| Longest U.S. State Borders | 0 | - | 4.67 | 39,523 |
| Top 10 U.S. States with the Highest Elevation | 0 | - | 4.51 | 67,805 |
| U.S. States with the Most Venomous Snake Species | 0 | - | 4.47 | 26,345 |
| U.S. States with the Most Endangered Species | 0 | - | 4.50 | 14,332 |
| U.S. States with the Lowest Average Elevation | 0 | - | 4.55 | 38,424 |
| U.S. States With the Highest Average Elevation | 0 | - | 4.61 | 32,697 |
| U.S. States with the Fewest Borders | 0 | - | 4.77 | 113,190 |
| U.S. States with the Most Borders | 0 | - | 4.53 | 62,252 |
| Flags of North and South America | 0 | - | 4.99 | 369,284 |
| Belize Country Quiz | 0 | - | 4.85 | 20,853 |
| Top U.S. Universities | 0 | - | 4.15 | 144,395 |
| Largest United States Airlines | 0 | - | 4.39 | 54,899 |
| Third Most Common Language by U.S. State | 0 | - | 4.87 | 113,487 |
| U.S. States by Governor | 0 | - | 4.43 | 18,003 |
| U.S. Political Parties in History | 0 | - | 4.44 | 27,606 |
| U.S. Government Agencies | 0 | - | 4.44 | 19,586 |
| Florida Pro Sport Teams | 0 | - | 4.61 | 11,780 |
| Georgia ... or Georgia? | 0 | - | 4.67 | 76,549 |
| U.S. Geography by Letter - C | 0 | - | 4.27 | 73,699 |
| U.S. Geography by Letter - A | 0 | - | 4.38 | 62,658 |
| U.S. Geography by Letter - D | 0 | - | 4.08 | 56,652 |
| U.S. Geography by Letter - T | 0 | - | 4.29 | 49,326 |
| U.S. Geography by Letter - P | 0 | - | 4.36 | 47,761 |
| U.S. Geography by Letter - M | 0 | - | 4.14 | 52,919 |
| U.S. Geography by Letter - L | 0 | - | 4.04 | 40,755 |
| U.S. Geography by Letter - G | 0 | - | 4.13 | 38,891 |
| U.S. Geography By Letter - H | 0 | - | 4.35 | 39,673 |
| American Legal Vocabulary | 0 | - | 4.40 | 33,823 |
| U.S. Cities by Picture #1 | 0 | - | 4.36 | 34,411 |
| Cities by Picture #2 | 0 | - | 4.19 | 34,990 |
| 10 U.S. States With The Lowest Murder Rates | 0 | - | 4.51 | 41,353 |
| Biggest Trading Partners - United States | 0 | - | 4.63 | 106,460 |
| The U.S. Government - How Does it Work? | 0 | - | 4.34 | 42,230 |
| American Founding Fathers | 0 | - | 4.41 | 23,094 |
| Famous People from California by Picture | 0 | - | 4.32 | 36,247 |
| California Groups of Things | 0 | - | 4.25 | 45,318 |
| Hawaiian Islands Map Quiz | 0 | - | 4.78 | 22,218 |
| Boston Talk to English Translation Quiz | 0 | - | 4.59 | 55,798 |
| New York Groups of Things | 0 | - | 4.38 | 60,007 |
| People on Money - United States | 0 | - | 4.31 | 63,241 |
| U.S. History Groups of Two | 0 | - | 4.23 | 44,306 |
| 100 Most Influential Figures in U.S. History | 0 | - | 4.20 | 44,787 |
| Last 10 U.S. States Alphabetically | 0 | - | 4.35 | 74,679 |
| Top 10 Least Populous U.S. State Capitals | 0 | - | 4.52 | 21,478 |
| 10 U.S. States With The Highest Murder Rates | 0 | - | 4.47 | 53,450 |
| Flyover States | 0 | - | 4.52 | 29,434 |
| U.S. States With Double Letters | 0 | - | 4.54 | 23,982 |
| U.S. States Bigger than Their Neighbors | 0 | - | 4.27 | 75,929 |
| U.S. States by Wikipedia Descriptions #1 | 0 | - | 4.57 | 39,250 |
| U.S. States by Wikipedia Descriptions #2 | 0 | - | 4.47 | 37,003 |
| States and Provinces that touch the Rocky Mountains | 0 | - | 4.42 | 32,440 |
| Name a Valid U.S. State #2 | 0 | - | 4.63 | 76,634 |
| Name a Valid U.S. State #3 | 0 | - | 4.78 | 48,806 |
| U.S. State Superlatives #1 | 0 | - | 4.47 | 87,349 |
| U.S. State Superlatives #2 | 0 | - | 4.53 | 40,526 |
| 50 States, 50 Cities - Easy Version | 0 | - | 4.39 | 128,109 |
| Top 10 U.S. States With the Most Tornadoes | 0 | - | 4.53 | 64,559 |
| Top 10 Richest U.S. States by Median Income | 0 | - | 4.47 | 118,652 |
| Top 10 Least Religious U.S. States | 0 | - | 4.51 | 34,156 |
| Top 10 Least-Forested U.S. States | 0 | - | 4.50 | 46,378 |
| Top 10 U.S. States by Public Transit | 0 | - | 4.77 | 63,521 |
| Top 10 U.S. States with the Most Precipitation | 0 | - | 4.46 | 41,609 |
| The Only American Country ... | 0 | - | 4.92 | 121,067 |
| American Countries with the Shortest Names | 0 | - | 4.96 | 120,614 |
| U.S. State Border Crossings | 0 | - | 4.97 | 96,118 |
| U.S. Citizenship Test Questions | 0 | - | 4.83 | 238,653 |
| U.S. Cities with the Most International Tourists | 0 | - | 4.88 | 75,072 |
| Cities and Towns of Massachusetts | 0 | - | 4.92 | 73,314 |
| Who Did that Motown Song? | 0 | - | 4.48 | 13,028 |
| Countries Larger Than Texas but With Fewer People | 0 | - | 4.92 | 39,635 |
| Regions of U.S. States | 0 | - | 4.37 | 43,593 |
| 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 | 28,799 |
| Which U.S. State - Multiple Choice | 0 | - | 4.48 | 20,231 |
| Movies by State | 0 | - | 4.27 | 40,473 |
| Canada Country Quiz | 0 | - | 4.55 | 131,970 |
| Canada Cities Map Quiz | 0 | - | 4.63 | 123,794 |
| Canada A-Z | 0 | - | 4.73 | 32,703 |
| European Countries with NO Wolves | 0 | - | 4.56 | 65,555 |
| Top 10 Biggest Economies in the Americas | 0 | - | 4.93 | 91,337 |
| Mexico Country Quiz | 0 | - | 4.49 | 72,120 |
| Mexico Cities Map Quiz | 0 | - | 4.77 | 33,352 |
| All First-Level Subdivisions of South America on a Map | 0 | - | 4.92 | 53,266 |
| Brazil States Map Quiz | 0 | - | 4.85 | 47,574 |
| States of Brazil | 0 | - | 4.97 | 86,845 |
| Fictional Characters from the Midwest by Picture | 0 | - | 4.04 | 19,166 |
| U.S. States by Picture #1 | 0 | - | 4.21 | 15,379 |
| Most-Visited U.S. Cities | 0 | - | 4.85 | 92,808 |
| Every U.S. Metro Area on a Map | 0 | - | 4.97 | 81,110 |
| Senators Who Ran For President | 0 | - | 4.24 | 17,005 |
| U.S. Electoral College Landslides | 0 | - | 4.35 | 22,007 |
| Geography of California | 0 | - | 4.25 | 10,520 |
| California Pro Sport Teams | 0 | - | 4.19 | 22,660 |
| Chicago City Trivia | 0 | - | 4.31 | 31,404 |
| New York Pro Sport Teams | 0 | - | 4.32 | 25,827 |
| Texas Pro Sport Teams | 0 | - | 4.19 | 16,791 |
| History of Pennsylvania | 0 | - | 4.16 | 7,100 |
| History of Virginia | 0 | - | 4.31 | 11,566 |
| Washington State by Picture | 0 | - | 4.26 | 7,697 |
| Events in U.S. History | 0 | - | 4.40 | 28,539 |
| Events by U.S. State #1 | 0 | - | 4.43 | 22,862 |
| Mississippi River States Empty Map Quiz | 0 | - | 4.81 | 55,708 |
| Most Valuable Crops by U.S. State | 0 | - | 4.40 | 38,984 |
| 10 U.S. States with the Highest Tax Burden | 0 | - | 4.26 | 38,092 |
| Top 10 U.S. States by Manufacturing Employment | 0 | - | 4.49 | 28,768 |
| African-American Historical Figures | 0 | - | 4.18 | 17,143 |
| Canadian Prime Ministers | 0 | - | 4.63 | 57,225 |
| Capitals of Canadian Provinces | 0 | - | 4.85 | 88,632 |
| U.S. States With No City Over 100,000 | 0 | - | 4.57 | 17,874 |
| Canada or Africa by Area | 0 | - | 4.77 | 18,159 |
| Top 10 American Countries by Coastline | 0 | - | 4.96 | 88,157 |
| Top 10 Richest Countries in the Americas | 0 | - | 4.93 | 80,951 |
| U.S. Geography by Letter - N | 0 | - | 3.79 | 52,455 |
| U.S. Geography by Letter - E | 0 | - | 3.75 | 48,460 |
| U.S. Geography by Letter - F | 0 | - | 3.87 | 44,724 |
| U.S. Geography by Letter - O | 0 | - | 3.52 | 41,030 |
| U.S. Geography by Letter - R | 0 | - | 4.18 | 30,577 |
| Countries Bordering Brazil | 0 | - | 4.96 | 131,237 |
| Countries That Visit Brazil The Most | 0 | - | 4.95 | 49,374 |
| Colombia Country Quiz | 0 | - | 4.90 | 40,458 |
| Costa Rica Country Quiz | 0 | - | 4.75 | 32,000 |
| Cuba Country Quiz | 0 | - | 4.69 | 51,281 |
