| Top 10 Non-English Languages Spoken in New York City | 0 | - | 4.85 | 65,967 |
| Deadliest U.S. Wars | 0 | - | 4.89 | 190,207 |
| US States Quiz | 0 | - | 5.00 | 16,799,043 |
| Name the U.S. National Parks | 0 | - | 4.86 | 59,637 |
| Total United States Immigration by Country | 0 | - | 4.91 | 111,153 |
| Most Common U.S. Last Names - Extreme | 0 | - | 4.94 | 173,923 |
| "Do Not Travel" Countries for U.S. Citizens | 0 | - | 4.97 | 242,627 |
| U.S. Cabinet Departments | 0 | - | 4.86 | 72,731 |
| States of the U.S. in Alphabetical Order | 0 | - | 4.98 | 366,287 |
| All 3,143 Counties of the United States on a Map | 0 | - | 4.97 | 330,280 |
| Pixelated United States Map | 0 | - | 4.89 | 93,905 |
| Most-Visited Countries by Americans | 0 | - | 4.87 | 109,128 |
| Countries that Visit the United States the Most | 0 | - | 4.96 | 91,360 |
| The 13 Colonies Quiz | 0 | - | 4.97 | 117,467 |
| U.S. States with the Letter Y | 0 | - | 4.85 | 111,009 |
| 10 Southernmost U.S. States | 0 | - | 4.88 | 113,022 |
| U.S. States with Short Names | 0 | - | 4.91 | 148,508 |
| U.S. States that Start with M | 0 | - | 4.93 | 186,729 |
| U.S. States By Population | 0 | - | 4.92 | 152,866 |
| U.S. States that Start with N | 0 | - | 4.95 | 171,009 |
| U.S. States with Longest Names | 0 | - | 4.84 | 44,225 |
| U.S. States with a Unique First Letter | 0 | - | 4.96 | 88,028 |
| 10 Westernmost U.S. States | 0 | - | 4.95 | 64,030 |
| The Only Remaining U.S. State . . . | 0 | - | 4.92 | 65,356 |
| US States with an Empty Map | 0 | - | 5.00 | 621,963 |
| 10 Longest Rivers in the United States | 0 | - | 4.85 | 39,024 |
| Countries Closest to United States by Continent | 0 | - | 4.99 | 145,967 |
| Countries that Beat the United States | 0 | - | 4.93 | 166,298 |
| Louisiana Purchase with a Map | 0 | - | 4.96 | 48,202 |
| Top 10 Most-Visited U.S. States | 0 | - | 4.90 | 101,478 |
| U.S. States with the Most Immigrants | 0 | - | 4.85 | 82,252 |
| U.S. States or European Countries by Area | 0 | - | 4.95 | 95,501 |
| U.S. States or European Countries by Population | 0 | - | 4.97 | 132,662 |
| Name a Valid U.S. State #1 | 0 | - | 4.93 | 208,081 |
| Top 10 Coldest U.S. States | 0 | - | 4.94 | 124,327 |
| Top 10 Hottest U.S. States | 0 | - | 4.86 | 125,204 |
| Top 10 Most Native American U.S. States | 0 | - | 4.87 | 91,642 |
| Top 10 U.S. States with the Least Precipitation | 0 | - | 4.82 | 61,750 |
| Top 10 Non-English Languages of Los Angeles | 0 | - | 4.42 | 59,778 |
| 10 Closest Megacities to New York City | 0 | - | 4.52 | 67,263 |
| Countries Larger Than Texas but With Fewer People | 0 | - | 4.92 | 39,738 |
| U.S. History for Dummies | 0 | - | 4.47 | 82,812 |
| Georgia ... or Georgia? | 0 | - | 4.67 | 76,618 |
| States of Mexico | 0 | - | 4.95 | 175,063 |
| Mexico States Map Quiz | 0 | - | 4.85 | 104,288 |
| Florida Pro Sport Teams | 0 | - | 4.61 | 11,804 |
| Boston Talk to English Translation Quiz | 0 | - | 4.59 | 55,859 |
| History of Pennsylvania | 0 | - | 4.16 | 7,117 |
| U.S. State Nicknames | 0 | - | 4.47 | 50,418 |
| Countries with American Expatriates | 0 | - | 4.53 | 42,533 |
| United States Landmarks Map Quiz | 0 | - | 4.55 | 40,146 |
| United States Country Quiz | 0 | - | 4.43 | 101,158 |
| Busiest Air Routes from the U.S. | 0 | - | 4.46 | 76,782 |
| U.S. Presidents Quiz | 0 | - | 5.00 | 3,679,451 |
| American Founding Fathers | 0 | - | 4.42 | 23,165 |
| Famous People from California by Picture | 0 | - | 4.32 | 36,320 |
| California Groups of Things | 0 | - | 4.25 | 45,348 |
| Hawaiian Islands Map Quiz | 0 | - | 4.78 | 22,230 |
| New York Groups of Things | 0 | - | 4.38 | 60,038 |
| Famous People from Virginia by Picture | 0 | - | 4.18 | 24,184 |
| People on Money - United States | 0 | - | 4.31 | 63,291 |
| U.S. History Groups of Two | 0 | - | 4.23 | 44,358 |
| 100 Most Influential Figures in U.S. History | 0 | - | 4.20 | 44,913 |
| Most-Visited Countries by Canadians | 0 | - | 4.82 | 39,213 |
| Countries Closest to Canada | 0 | - | 4.91 | 197,847 |
| Asian Countries Americans Travel to the Most | 0 | - | 4.75 | 59,831 |
| U.S. Geography by Letter - B | 0 | - | 4.53 | 69,012 |
| U.S. Geography by Letter - S | 0 | - | 4.55 | 52,496 |
| Two Letter U.S. State Abbreviations | 0 | - | 4.19 | 745,582 |
| Countries Closest to the U. S. | 0 | - | 4.41 | 208,593 |
| American Geography Quiz for Dummies | 0 | - | 4.41 | 68,964 |
| U.S. Federal Agency Acronyms | 0 | - | 4.50 | 79,877 |
| New England States | 0 | - | 4.51 | 59,764 |
| U.S. States by Land Area | 0 | - | 4.61 | 52,687 |
| Top 10 U.S. States by Inland Water Area | 0 | - | 4.53 | 37,961 |
| Add a Letter - Make a U.S. State | 0 | - | 4.72 | 82,608 |
| Top 10 Widest U.S. States East to West | 0 | - | 4.70 | 55,867 |
| Top 10 Tallest U.S. States North to South | 0 | - | 4.74 | 40,818 |
| U.S. States by Borders | 0 | - | 4.61 | 35,224 |
| Save Americans by Guessing U.S. States | 0 | - | 4.63 | 184,424 |
| 10 Easternmost U.S. States | 0 | - | 4.53 | 56,385 |
| The Only U.S. State ... #1 | 0 | - | 4.52 | 101,877 |
| 50 States, 50 Cities - Hard Version | 0 | - | 4.46 | 44,107 |
| Countries that Beat Canada | 0 | - | 4.90 | 87,182 |
| Asian Last Names in the United States | 0 | - | 4.43 | 46,659 |
| United States Map Quiz | 0 | - | 4.98 | 4,150,006 |
| Countries Closest to Alaska | 0 | - | 4.93 | 123,931 |
| Geography of California | 0 | - | 4.26 | 10,536 |
| California Pro Sport Teams | 0 | - | 4.19 | 22,672 |
| Countries Closest to Maine | 0 | - | 4.85 | 66,838 |
| New York Pro Sport Teams | 0 | - | 4.32 | 25,859 |
| Texas Pro Sport Teams | 0 | - | 4.19 | 16,798 |
| Washington State by Picture | 0 | - | 4.26 | 7,708 |
| Events in U.S. History | 0 | - | 4.40 | 28,588 |
| U.S. License Plates Picture Quiz | 0 | - | 4.59 | 52,799 |
| U.S. States with the Fewest Immigrants | 0 | - | 4.63 | 65,641 |
| U.S. States with the Highest Percentage of Farmland | 0 | - | 4.80 | 65,398 |
| U.S. States with the Lowest Percentage of Farmland | 0 | - | 4.74 | 55,126 |
| Walking Across U.S. State Borders with Hints | 0 | - | 4.74 | 34,994 |
| U.S. States with the Longest International Borders | 0 | - | 4.78 | 45,721 |
| Longest U.S. State Borders | 0 | - | 4.67 | 39,632 |
| Top 10 U.S. States with the Highest Elevation | 0 | - | 4.51 | 67,838 |
| U.S. States with the Lowest Average Elevation | 0 | - | 4.55 | 38,444 |
| U.S. States With the Highest Average Elevation | 0 | - | 4.61 | 32,715 |
| U.S. States with the Fewest Borders | 0 | - | 4.77 | 113,304 |
| U.S. States with the Most Borders | 0 | - | 4.53 | 62,269 |
| Flags of North and South America | 0 | - | 4.99 | 370,885 |
| Belize Country Quiz | 0 | - | 4.85 | 20,903 |
| Saint Vincent and the Grenadines Country Quiz | 0 | - | 4.88 | 19,149 |
| Top U.S. Universities | 0 | - | 4.15 | 144,635 |
| Largest United States Airlines | 0 | - | 4.39 | 54,947 |
| Third Most Common Language by U.S. State | 0 | - | 4.87 | 113,588 |
| U.S. Five-Star Generals and Admirals | 0 | - | 4.33 | 8,320 |
| U.S. States by Governor | 0 | - | 4.43 | 18,026 |
| U.S. Political Parties in History | 0 | - | 4.44 | 27,634 |
| U.S. Government Agencies | 0 | - | 4.44 | 19,622 |
| U.S. Presidents by Picture | 0 | - | 4.87 | 425,334 |
| Famous People from Alabama by Picture | 0 | - | 4.07 | 24,019 |
| Los Angeles vs. New York | 0 | - | 4.41 | 19,779 |
| Famous People from Illinois by Picture | 0 | - | 4.03 | 20,119 |
| Famous People from Indiana by Picture | 0 | - | 4.36 | 24,966 |
| Famous People from Maryland by Picture | 0 | - | 4.23 | 16,814 |
| Famous People from Massachusetts by Picture | 0 | - | 4.29 | 24,445 |
| Famous People from Michigan by Picture | 0 | - | 4.30 | 21,352 |
| Famous People from New York by Picture | 0 | - | 4.03 | 27,430 |
| Famous Missourians | 0 | - | 4.12 | 6,393 |
| Famous People from New Jersey by Picture | 0 | - | 4.25 | 22,205 |
| Famous People from Texas by Picture | 0 | - | 3.99 | 33,327 |
| Famous People from Ohio by Picture | 0 | - | 4.03 | 17,658 |
| Famous People from Pennsylvania by Picture | 0 | - | 4.24 | 25,380 |
| Movies Set in Pennsylvania | 0 | - | 4.19 | 11,543 |
| Famous People from Tennessee by Picture | 0 | - | 4.33 | 27,293 |
| U.S. States that Border Tennessee | 0 | - | 4.83 | 65,236 |
| Famous People from Wisconsin | 0 | - | 4.03 | 6,819 |
| Valid Answer - U.S. History | 0 | - | 4.24 | 22,501 |
| Countries of Europe in 1650 with a Map | 0 | - | 4.95 | 68,510 |
| U.S. Geography by Letter - C | 0 | - | 4.27 | 73,770 |
| U.S. Geography by Letter - A | 0 | - | 4.37 | 62,745 |
| U.S. Geography by Letter - D | 0 | - | 4.08 | 56,740 |
| U.S. Geography by Letter - T | 0 | - | 4.29 | 49,416 |
| U.S. Geography by Letter - P | 0 | - | 4.36 | 47,859 |
| U.S. Geography by Letter - M | 0 | - | 4.14 | 52,973 |
| U.S. Geography by Letter - L | 0 | - | 4.04 | 40,835 |
| U.S. Geography by Letter - G | 0 | - | 4.13 | 38,971 |
| U.S. Geography By Letter - H | 0 | - | 4.35 | 39,787 |
| Dominica Country Quiz | 0 | - | 4.81 | 19,767 |
| Names of Generations | 0 | - | 4.11 | 40,418 |
| American Legal Vocabulary | 0 | - | 4.40 | 33,855 |
| U.S. Cities by Picture #1 | 0 | - | 4.36 | 34,463 |
| Cities by Picture #2 | 0 | - | 4.19 | 35,039 |
| 10 U.S. States With The Lowest Murder Rates | 0 | - | 4.51 | 41,808 |
| Biggest Trading Partners - United States | 0 | - | 4.63 | 106,529 |
| The U.S. Government - How Does it Work? | 0 | - | 4.34 | 42,294 |
| First Names of U.S. Presidents | 0 | - | 4.85 | 380,594 |
| Musical Acts from Los Angeles by Two Songs | 0 | - | 4.27 | 16,001 |
| Movies Set in San Francisco | 0 | - | 4.23 | 19,929 |
| Movies Set in Miami | 0 | - | 4.32 | 16,689 |
| Movies and TV Shows Set in Boston | 0 | - | 4.17 | 9,758 |
| New York City Geography | 0 | - | 4.42 | 33,035 |
| State Quiz - Virginia | 0 | - | 4.52 | 40,194 |
| Last 10 U.S. States Alphabetically | 0 | - | 4.35 | 74,737 |
| Top 10 Least Populous U.S. State Capitals | 0 | - | 4.52 | 21,499 |
| 10 U.S. States With The Highest Murder Rates | 0 | - | 4.47 | 53,758 |
| Flyover States | 0 | - | 4.52 | 29,460 |
| U.S. States With Double Letters | 0 | - | 4.54 | 24,034 |
| U.S. States Bigger than Their Neighbors | 0 | - | 4.27 | 76,018 |
| U.S. States by Wikipedia Descriptions #1 | 0 | - | 4.57 | 39,286 |
| U.S. States by Wikipedia Descriptions #2 | 0 | - | 4.48 | 37,046 |
| States and Provinces that touch the Rocky Mountains | 0 | - | 4.42 | 32,463 |
| Name a Valid U.S. State #2 | 0 | - | 4.63 | 76,803 |
| Name a Valid U.S. State #3 | 0 | - | 4.78 | 48,891 |
| U.S. State Superlatives #1 | 0 | - | 4.47 | 87,418 |
| U.S. State Superlatives #2 | 0 | - | 4.53 | 40,562 |
| 50 States, 50 Cities - Easy Version | 0 | - | 4.39 | 128,192 |
| Top 10 U.S. States With the Most Tornadoes | 0 | - | 4.53 | 64,630 |
| Top 10 Richest U.S. States by Median Income | 0 | - | 4.47 | 118,734 |
| Top 10 Least Religious U.S. States | 0 | - | 4.51 | 34,212 |
| Top 10 Least-Forested U.S. States | 0 | - | 4.50 | 46,436 |
| Top 10 U.S. States by Public Transit | 0 | - | 4.77 | 63,601 |
| Top 10 U.S. States with the Most Precipitation | 0 | - | 4.46 | 41,641 |
| The Only American Country ... | 0 | - | 4.92 | 121,258 |
| American Countries with the Shortest Names | 0 | - | 4.96 | 120,802 |
| U.S. State Border Crossings | 0 | - | 4.97 | 96,271 |
| U.S. Citizenship Test Questions | 0 | - | 4.83 | 238,956 |
| U.S. Cities with the Most International Tourists | 0 | - | 4.88 | 75,239 |
| Name a Valid U.S. President #1 | 0 | - | 4.89 | 190,932 |
| Play-Doh Presidents | 0 | - | 5.00 | 82,005 |
| Cities and Towns of Massachusetts | 0 | - | 4.92 | 73,552 |
| Who Did that Motown Song? | 0 | - | 4.48 | 13,040 |
| Regions of U.S. States | 0 | - | 4.37 | 43,699 |
| States, Provinces & Territories that Touch the Appalachian Mountains | 0 | - | 4.59 | 20,360 |
| 10 U.S. States with the Most Valuable Crops | 0 | - | 4.41 | 29,529 |
| U.S. States with the Lowest HDI | 0 | - | 4.47 | 28,819 |
| Which U.S. State - Multiple Choice | 0 | - | 4.48 | 20,256 |
| Movies by State | 0 | - | 4.27 | 40,508 |
| Canada Country Quiz | 0 | - | 4.54 | 132,179 |
| Canada Cities Map Quiz | 0 | - | 4.63 | 123,956 |
| Canada A-Z | 0 | - | 4.73 | 32,740 |
| Countries of Europe in 1815 With a Map | 0 | - | 4.99 | 149,661 |
| Countries of Europe in 1848 | 0 | - | 4.99 | 75,959 |
