| Deadliest U.S. Wars | 0 | - | 4.89 | 191,478 |
| US States Quiz | 0 | - | 5.00 | 16,949,555 |
| States of the U.S. in Alphabetical Order | 0 | - | 4.98 | 368,097 |
| Name the U.S. National Parks | 0 | - | 4.86 | 60,279 |
| Total United States Immigration by Country | 0 | - | 4.91 | 112,083 |
| Most Common U.S. Last Names - Extreme | 0 | - | 4.94 | 175,165 |
| "Do Not Travel" Countries for U.S. Citizens | 0 | - | 4.97 | 245,507 |
| U.S. Cabinet Departments | 0 | - | 4.86 | 73,008 |
| Top 10 Non-English Languages Spoken in New York City | 0 | - | 4.85 | 66,547 |
| All 3,143 Counties of the United States on a Map | 0 | - | 4.97 | 334,129 |
| Pixelated United States Map | 0 | - | 4.88 | 94,608 |
| Most-Visited Countries by Americans | 0 | - | 4.86 | 110,182 |
| Countries that Visit the United States the Most | 0 | - | 4.96 | 92,181 |
| U.S. History for Dummies | 0 | - | 4.47 | 83,282 |
| The 13 Colonies Quiz | 0 | - | 4.97 | 118,699 |
| U.S. States with the Letter Y | 0 | - | 4.85 | 111,921 |
| 10 Southernmost U.S. States | 0 | - | 4.89 | 113,919 |
| U.S. States with Short Names | 0 | - | 4.91 | 149,558 |
| U.S. States that Start with M | 0 | - | 4.93 | 187,913 |
| U.S. States By Population | 0 | - | 4.92 | 153,896 |
| U.S. States that Start with N | 0 | - | 4.95 | 171,912 |
| U.S. States with Longest Names | 0 | - | 4.84 | 44,709 |
| U.S. States with a Unique First Letter | 0 | - | 4.96 | 88,665 |
| 10 Westernmost U.S. States | 0 | - | 4.95 | 64,420 |
| The Only Remaining U.S. State . . . | 0 | - | 4.93 | 65,918 |
| Most-Visited Countries by Canadians | 0 | - | 4.83 | 39,515 |
| Countries Closest to Canada | 0 | - | 4.91 | 198,813 |
| 10 Longest Rivers in the United States | 0 | - | 4.85 | 39,305 |
| Countries Closest to United States by Continent | 0 | - | 4.99 | 146,897 |
| Countries that Beat the United States | 0 | - | 4.93 | 168,194 |
| Events in U.S. History | 0 | - | 4.41 | 28,767 |
| Louisiana Purchase with a Map | 0 | - | 4.96 | 49,019 |
| US States with an Empty Map | 0 | - | 5.00 | 627,043 |
| Top 10 Most-Visited U.S. States | 0 | - | 4.90 | 102,151 |
| U.S. States with the Most Immigrants | 0 | - | 4.85 | 82,792 |
| Countries that Beat Canada | 0 | - | 4.91 | 98,739 |
| U.S. States or European Countries by Area | 0 | - | 4.95 | 96,664 |
| U.S. States or European Countries by Population | 0 | - | 4.97 | 133,793 |
| American Founding Fathers | 0 | - | 4.42 | 23,252 |
| People on Money - United States | 0 | - | 4.31 | 63,398 |
| U.S. History Groups of Two | 0 | - | 4.23 | 44,545 |
| 100 Most Influential Figures in U.S. History | 0 | - | 4.20 | 45,161 |
| Name a Valid U.S. State #1 | 0 | - | 4.93 | 209,842 |
| Top 10 Coldest U.S. States | 0 | - | 4.94 | 125,563 |
| Top 10 Hottest U.S. States | 0 | - | 4.86 | 126,197 |
| Top 10 Most Native American U.S. States | 0 | - | 4.87 | 92,562 |
| Top 10 U.S. States with the Least Precipitation | 0 | - | 4.82 | 62,098 |
| States of Mexico | 0 | - | 4.96 | 177,383 |
| Mexico States Map Quiz | 0 | - | 4.84 | 105,394 |
| Dominica Country Quiz | 0 | - | 4.81 | 19,897 |
| Capitals of Canadian Provinces | 0 | - | 4.85 | 89,402 |
| Midwestern States of the U.S. | 0 | - | 4.88 | 14,016 |
| Mexico Cities Map Quiz | 0 | - | 4.83 | 38,751 |
| U.S. State Nicknames | 0 | - | 4.47 | 50,648 |
| Countries with American Expatriates | 0 | - | 4.53 | 42,637 |
| United States Landmarks Map Quiz | 0 | - | 4.55 | 40,246 |
| United States Country Quiz | 0 | - | 4.43 | 101,929 |
| Busiest Air Routes from the U.S. | 0 | - | 4.46 | 77,004 |
| U.S. Presidents Quiz | 0 | - | 5.00 | 3,715,920 |
| Valid Answer - U.S. History | 0 | - | 4.24 | 22,572 |
| Animals in American History | 0 | - | 4.20 | 28,080 |
| Canada Country Quiz | 0 | - | 4.54 | 132,829 |
| Canada Cities Map Quiz | 0 | - | 4.64 | 124,467 |
| Asian Countries Americans Travel to the Most | 0 | - | 4.75 | 60,118 |
| U.S. Geography by Letter - B | 0 | - | 4.53 | 69,797 |
| U.S. Geography by Letter - S | 0 | - | 4.55 | 53,228 |
| Two Letter U.S. State Abbreviations | 0 | - | 4.19 | 748,752 |
| Names of Generations | 0 | - | 4.09 | 45,337 |
| Countries Closest to the U. S. | 0 | - | 4.41 | 210,127 |
| American Geography Quiz for Dummies | 0 | - | 4.41 | 69,318 |
| U.S. Federal Agency Acronyms | 0 | - | 4.50 | 80,083 |
| Top 10 Non-English Languages of Los Angeles | 0 | - | 4.43 | 60,025 |
| 10 Closest Megacities to New York City | 0 | - | 4.52 | 67,470 |
| American History Quotes #1 | 0 | - | 4.37 | 96,141 |
| American History Quotes #2 | 0 | - | 4.38 | 41,472 |
| New England States | 0 | - | 4.51 | 59,864 |
| U.S. States by Land Area | 0 | - | 4.63 | 52,964 |
| Top 10 U.S. States by Inland Water Area | 0 | - | 4.53 | 38,069 |
| Add a Letter - Make a U.S. State | 0 | - | 4.70 | 83,002 |
| Top 10 Widest U.S. States East to West | 0 | - | 4.70 | 56,182 |
| Top 10 Tallest U.S. States North to South | 0 | - | 4.75 | 41,061 |
| U.S. States by Borders | 0 | - | 4.61 | 35,416 |
| Save Americans by Guessing U.S. States | 0 | - | 4.61 | 187,598 |
| 10 Easternmost U.S. States | 0 | - | 4.53 | 56,617 |
| The Only U.S. State ... #1 | 0 | - | 4.52 | 102,227 |
| 50 States, 50 Cities - Hard Version | 0 | - | 4.46 | 44,320 |
| Canadian Prime Ministers | 0 | - | 4.64 | 57,764 |
| Asian Last Names in the United States | 0 | - | 4.43 | 46,892 |
| United States Map Quiz | 0 | - | 4.98 | 4,166,478 |
| Rivers of the United States | 0 | - | 4.93 | 66,468 |
| Countries Closest to Alaska | 0 | - | 4.93 | 124,827 |
| Countries Closest to Maine | 0 | - | 4.85 | 67,403 |
| History of Pennsylvania | 0 | - | 4.16 | 7,156 |
| History of Virginia | 0 | - | 4.31 | 11,624 |
| Great Plains States and Provinces on a Map | 0 | - | 4.95 | 49,870 |
| Flags of North and South America | 0 | - | 4.99 | 375,388 |
| Belize Country Quiz | 0 | - | 4.85 | 21,046 |
| Saint Vincent and the Grenadines Country Quiz | 0 | - | 4.88 | 19,273 |
| Top U.S. Universities | 0 | - | 4.15 | 145,553 |
| Largest United States Airlines | 0 | - | 4.39 | 55,111 |
| U.S. Five-Star Generals and Admirals | 0 | - | 4.33 | 8,347 |
| 10 U.S. States With The Lowest Murder Rates | 0 | - | 4.48 | 52,579 |
| Biggest Trading Partners - United States | 0 | - | 4.63 | 106,780 |
| U.S. States by Governor | 0 | - | 4.43 | 18,095 |
| U.S. Political Parties in History | 0 | - | 4.44 | 27,732 |
| U.S. Government Agencies | 0 | - | 4.44 | 19,731 |
| Red State or Blue State Trait? | 0 | - | 4.42 | 55,566 |
| U.S. Presidents by Picture | 0 | - | 4.87 | 427,741 |
| Florida Pro Sport Teams | 0 | - | 4.61 | 11,882 |
| Boston Talk to English Translation Quiz | 0 | - | 4.59 | 56,088 |
| Six Flags Over Texas | 0 | - | 4.78 | 63,520 |
| The American Civil War | 0 | - | 4.62 | 52,560 |
| U.S. License Plates Picture Quiz | 0 | - | 4.61 | 53,050 |
| U.S. States with the Fewest Immigrants | 0 | - | 4.63 | 65,961 |
| U.S. States that Border Canada | 0 | - | 4.91 | 186,022 |
| U.S. States with the Highest Percentage of Farmland | 0 | - | 4.80 | 65,569 |
| U.S. States with the Lowest Percentage of Farmland | 0 | - | 4.74 | 55,283 |
| 10 U.S. States With The Highest Murder Rates | 0 | - | 4.47 | 54,667 |
| States and Provinces that touch the Rocky Mountains | 0 | - | 4.43 | 32,535 |
| Name a Valid U.S. State #2 | 0 | - | 4.63 | 77,245 |
| Walking Across U.S. State Borders with Hints | 0 | - | 4.74 | 35,096 |
| Name a Valid U.S. State #3 | 0 | - | 4.78 | 49,188 |
| U.S. States with the Longest International Borders | 0 | - | 4.78 | 45,886 |
| Longest U.S. State Borders | 0 | - | 4.67 | 40,019 |
| U.S. State Superlatives #1 | 0 | - | 4.47 | 87,618 |
| U.S. State Superlatives #2 | 0 | - | 4.53 | 40,706 |
| Top 10 U.S. States with the Highest Elevation | 0 | - | 4.51 | 67,931 |
| Top 10 U.S. States With the Most Tornadoes | 0 | - | 4.53 | 64,913 |
| Top 10 Least Religious U.S. States | 0 | - | 4.51 | 34,383 |
| Top 10 U.S. States by Public Transit | 0 | - | 4.77 | 63,932 |
| Top 10 U.S. States People are Leaving | 0 | - | 4.42 | 65,781 |
| Top 10 U.S. States People are Moving To | 0 | - | 4.74 | 64,080 |
| U.S. States with the Lowest Average Elevation | 0 | - | 4.55 | 38,549 |
| U.S. States With the Highest Average Elevation | 0 | - | 4.61 | 32,812 |
| Top 10 U.S. States with the Most Precipitation | 0 | - | 4.46 | 41,777 |
| U.S. States with the Fewest Borders | 0 | - | 4.78 | 114,077 |
| U.S. States with the Most Borders | 0 | - | 4.53 | 62,339 |
| U.S. States that Start with M - Shape Quiz | 0 | - | 4.94 | 58,320 |
| O Canada Lyrics | 0 | - | 4.47 | 51,021 |
| Canada Provinces Map Quiz | 0 | - | 4.99 | 642,703 |
| NHL Hockey Teams in Canada | 0 | - | 4.35 | 35,130 |
| Georgia ... or Georgia? | 0 | - | 4.67 | 76,929 |
| Canada or Africa by Area | 0 | - | 4.78 | 18,479 |
| U.S. Geography by Letter - C | 0 | - | 4.27 | 74,386 |
| U.S. Geography by Letter - A | 0 | - | 4.37 | 63,415 |
| U.S. Geography by Letter - D | 0 | - | 4.09 | 57,380 |
| U.S. Geography by Letter - T | 0 | - | 4.29 | 50,108 |
| U.S. Geography by Letter - P | 0 | - | 4.38 | 54,270 |
| U.S. Geography by Letter - M | 0 | - | 4.14 | 53,546 |
| U.S. Geography by Letter - L | 0 | - | 4.04 | 41,416 |
| U.S. Geography by Letter - G | 0 | - | 4.13 | 39,579 |
| U.S. Geography by Letter - R | 0 | - | 4.22 | 36,612 |
| U.S. Geography By Letter - H | 0 | - | 4.35 | 40,478 |
| Third Most Common Language by U.S. State | 0 | - | 4.87 | 113,896 |
| American Legal Vocabulary | 0 | - | 4.40 | 33,981 |
| U.S. Cities by Picture #1 | 0 | - | 4.36 | 34,663 |
| Cities by Picture #2 | 0 | - | 4.19 | 35,228 |
| The U.S. Government - How Does it Work? | 0 | - | 4.34 | 42,424 |
| First Names of U.S. Presidents | 0 | - | 4.86 | 382,946 |
| Famous People from California by Picture | 0 | - | 4.32 | 36,615 |
| California Groups of Things | 0 | - | 4.26 | 45,683 |
| Hawaiian Islands Map Quiz | 0 | - | 4.78 | 22,302 |
| New York Groups of Things | 0 | - | 4.39 | 71,134 |
| U.S. History A-Z #1 | 0 | - | 4.36 | 30,253 |
| Fifty US States in One Minute | 0 | - | 4.62 | 3,549,454 |
| Last 10 U.S. States Alphabetically | 0 | - | 4.35 | 74,972 |
| Top 10 Least Populous U.S. State Capitals | 0 | - | 4.52 | 21,553 |
| Flyover States | 0 | - | 4.52 | 29,566 |
| U.S. States With Double Letters | 0 | - | 4.55 | 24,214 |
| U.S. States Bigger than Their Neighbors | 0 | - | 4.28 | 76,322 |
| Category Elimination - U.S. States #1 | 0 | - | 4.88 | 221,841 |
| Category Elimination - U.S. States #2 | 0 | - | 4.83 | 135,062 |
| U.S. States by Wikipedia Descriptions #1 | 0 | - | 4.57 | 39,417 |
| U.S. States by Wikipedia Descriptions #2 | 0 | - | 4.48 | 37,153 |
| 50 States, 50 Cities - Easy Version | 0 | - | 4.39 | 128,575 |
| Top 10 Richest U.S. States by Median Income | 0 | - | 4.47 | 119,233 |
| Top 10 Least-Forested U.S. States | 0 | - | 4.50 | 46,615 |
| Famous Canadians by Picture | 0 | - | 4.39 | 49,454 |
| Countries of Europe in 1650 with a Map | 0 | - | 4.95 | 69,970 |
| The Only American Country ... | 0 | - | 4.92 | 121,978 |
| American Countries with the Shortest Names | 0 | - | 4.96 | 121,448 |
| U.S. State Border Crossings | 0 | - | 4.97 | 96,725 |
| U.S. Citizenship Test Questions | 0 | - | 4.83 | 240,514 |
| U.S. Cities with the Most International Tourists | 0 | - | 4.88 | 75,756 |
| Name a Valid U.S. President #1 | 0 | - | 4.89 | 193,156 |
| Play-Doh Presidents | 0 | - | 5.00 | 82,684 |
| History of Florida | 0 | - | 4.45 | 9,859 |
| Cities and Towns of Massachusetts | 0 | - | 4.92 | 74,677 |
| Who Did that Motown Song? | 0 | - | 4.48 | 13,067 |
| History of Texas | 0 | - | 4.43 | 14,671 |
| Countries Larger Than Texas but With Fewer People | 0 | - | 4.92 | 40,141 |
| Last Names in U.S. History #1 | 0 | - | 4.25 | 36,303 |
| Regions of U.S. States | 0 | - | 4.37 | 44,071 |
| States, Provinces & Territories that Touch the Appalachian Mountains | 0 | - | 4.59 | 20,404 |
| 10 U.S. States with the Most Valuable Crops | 0 | - | 4.41 | 29,611 |
| U.S. States with the Lowest HDI | 0 | - | 4.47 | 28,905 |
| Which U.S. State - Multiple Choice | 0 | - | 4.48 | 20,337 |
| Movies by State | 0 | - | 4.27 | 40,585 |
| Canada A-Z | 0 | - | 4.73 | 32,922 |
| Ontario Cities Map Quiz | 0 | - | 4.64 | 19,510 |
