| States of Brazil | 0 | - | 4.98 | 89,895 |
| All First-Level Subdivisions of South America on a Map | 0 | - | 4.93 | 54,949 |
| Brazil States Map Quiz | 0 | - | 4.86 | 48,667 |
| Countries Bordering Brazil | 0 | - | 4.96 | 132,301 |
| States of Mexico | 0 | - | 4.96 | 178,472 |
| Colombia Country Quiz | 0 | - | 4.90 | 41,028 |
| South American Geography Quiz #2 | 0 | - | 4.41 | 44,252 |
| South American Geography Quiz #1 | 0 | - | 4.63 | 32,920 |
| Brazil Country Quiz | 0 | - | 4.52 | 102,435 |
| Countries That Visit Brazil The Most | 0 | - | 4.95 | 49,938 |
| South America A-Z | 0 | - | 4.15 | 10,951 |
| Flags of North and South America | 0 | - | 4.99 | 377,526 |
| South American Physical Geography | 0 | - | 4.58 | 18,409 |
| Uruguay Country Quiz | 0 | - | 4.84 | 31,775 |
| Most Guessed Cities in Europe - Not Capitals | 0 | - | 4.83 | 88,081 |
| South America Capitals Quiz | 0 | - | 5.00 | 485,306 |
| Famous Germans | 0 | - | 4.50 | 55,830 |
| Famous Italians by Clue | 0 | - | 4.45 | 90,466 |
| The Only American Country ... | 0 | - | 4.92 | 122,277 |
| American Countries with the Shortest Names | 0 | - | 4.97 | 121,720 |
| U.S. Citizenship Test Questions | 0 | - | 4.83 | 240,889 |
| US States Quiz | 0 | - | 5.00 | 17,008,979 |
| States of the U.S. in Alphabetical Order | 0 | - | 4.98 | 368,779 |
| Canada A-Z | 0 | - | 4.73 | 32,981 |
| European Geography By Letter - P #1 | 0 | - | 4.81 | 99,047 |
| Asian Geography By Letter - B | 0 | - | 4.85 | 67,076 |
| Top 10 Biggest Economies in the Americas | 0 | - | 4.94 | 92,898 |
| U.S. Geography by Letter - B | 0 | - | 4.54 | 70,098 |
| U.S. Geography by Letter - S | 0 | - | 4.55 | 58,234 |
| Hispanic Last Names in the U.S. | 0 | - | 4.31 | 54,866 |
| Famous Mexicans and Mexican-Americans | 0 | - | 4.15 | 16,965 |
| Mexico States Map Quiz | 0 | - | 4.85 | 105,712 |
| Countries of South America with an Empty Map | 0 | - | 4.95 | 105,550 |
| Argentina Country Quiz | 0 | - | 4.53 | 57,832 |
| Brazil Cities Map Quiz | 0 | - | 4.62 | 36,851 |
| Chile Country Quiz | 0 | - | 4.75 | 40,314 |
| Ecuador Country Quiz | 0 | - | 4.60 | 32,027 |
| Peru Country Quiz | 0 | - | 4.54 | 48,956 |
| Name the U.S. National Parks | 0 | - | 4.86 | 60,536 |
| Two Letter U.S. State Abbreviations | 0 | - | 4.19 | 750,024 |
| Total United States Immigration by Country | 0 | - | 4.91 | 112,478 |
| Most Common U.S. Last Names - Extreme | 0 | - | 4.94 | 175,631 |
| "Do Not Travel" Countries for U.S. Citizens | 0 | - | 4.97 | 246,750 |
| All 3,143 Counties of the United States on a Map | 0 | - | 4.97 | 335,853 |
| U.S. Cabinet Departments | 0 | - | 4.86 | 73,130 |
| Top 10 Non-English Languages Spoken in New York City | 0 | - | 4.85 | 66,768 |
| Famous French People | 0 | - | 4.05 | 36,127 |
| Famous Australians by Description | 0 | - | 4.23 | 28,166 |
| Top 10 American Countries by Coastline | 0 | - | 4.96 | 88,642 |
| Top 10 Richest Countries in the Americas | 0 | - | 4.94 | 95,504 |
| Mexico Cities Map Quiz | 0 | - | 4.83 | 38,840 |
| South American Capitals - Map Quiz | 0 | - | 4.98 | 131,518 |
| Which South American Country? | 0 | - | 4.69 | 52,132 |
| 10 Longest Rivers in the United States | 0 | - | 4.85 | 39,418 |
| Pixelated United States Map | 0 | - | 4.89 | 94,861 |
| Most-Visited Countries by Americans | 0 | - | 4.86 | 110,639 |
| Countries that Visit the United States the Most | 0 | - | 4.96 | 92,512 |
| Countries Closest to United States by Continent | 0 | - | 4.99 | 147,307 |
| Countries that Beat the United States | 0 | - | 4.93 | 168,772 |
| Deadliest U.S. Wars | 0 | - | 4.89 | 191,875 |
| The 13 Colonies Quiz | 0 | - | 4.97 | 119,131 |
| U.S. States with the Letter Y | 0 | - | 4.86 | 112,353 |
| 10 Southernmost U.S. States | 0 | - | 4.89 | 114,374 |
| U.S. States with Short Names | 0 | - | 4.91 | 150,426 |
| U.S. States that Start with M | 0 | - | 4.93 | 188,456 |
| U.S. States By Population | 0 | - | 4.92 | 154,205 |
| U.S. States that Start with N | 0 | - | 4.95 | 172,304 |
| U.S. States with Longest Names | 0 | - | 4.85 | 44,934 |
| Louisiana Purchase with a Map | 0 | - | 4.96 | 49,384 |
| US States with an Empty Map | 0 | - | 5.00 | 629,113 |
| 10 Westernmost U.S. States | 0 | - | 4.95 | 64,565 |
| The Only Remaining U.S. State . . . | 0 | - | 4.93 | 66,152 |
| Top 10 Most-Visited U.S. States | 0 | - | 4.90 | 102,527 |
| U.S. States with the Most Immigrants | 0 | - | 4.85 | 83,068 |
| Most-Visited Countries by Canadians | 0 | - | 4.83 | 39,643 |
| Countries Closest to Canada | 0 | - | 4.91 | 199,558 |
| Pre-Euro Currencies | 0 | - | 4.44 | 52,757 |
| U.S. States or European Countries by Area | 0 | - | 4.95 | 97,280 |
| U.S. States or European Countries by Population | 0 | - | 4.97 | 134,492 |
| Famous Dutch and Belgian People | 0 | - | 4.56 | 18,152 |
| U.S. Geography by Letter - C | 0 | - | 4.27 | 74,649 |
| U.S. Geography by Letter - A | 0 | - | 4.37 | 63,692 |
| U.S. Geography by Letter - D | 0 | - | 4.09 | 57,654 |
| U.S. Geography by Letter - T | 0 | - | 4.29 | 50,422 |
| U.S. Geography by Letter - P | 0 | - | 4.38 | 54,574 |
| U.S. Geography by Letter - M | 0 | - | 4.14 | 53,756 |
| U.S. Geography by Letter - L | 0 | - | 4.04 | 41,686 |
| U.S. Geography by Letter - G | 0 | - | 4.13 | 39,836 |
| U.S. Geography by Letter - R | 0 | - | 4.22 | 37,041 |
| U.S. Geography By Letter - H | 0 | - | 4.35 | 40,769 |
| Guyana Country Quiz | 0 | - | 4.50 | 22,945 |
| Countries that Beat Brazil | 0 | - | 4.49 | 69,288 |
| Venezuela Country Quiz | 0 | - | 4.51 | 30,754 |
| Paraguay Country Quiz | 0 | - | 4.54 | 25,421 |
| Bolivia Country Quiz | 0 | - | 4.63 | 26,411 |
| Suriname Country Quiz | 0 | - | 4.61 | 19,944 |
| American Legal Vocabulary | 0 | - | 4.40 | 34,030 |
| People on Money - United States | 0 | - | 4.31 | 63,441 |
| Name a Valid U.S. State #1 | 0 | - | 4.93 | 210,671 |
| Top 10 Coldest U.S. States | 0 | - | 4.94 | 125,930 |
| Top 10 Hottest U.S. States | 0 | - | 4.86 | 126,583 |
| Top 10 Most Native American U.S. States | 0 | - | 4.87 | 92,924 |
| Top 10 U.S. States with the Least Precipitation | 0 | - | 4.83 | 62,237 |
| European Countries by First 2 Letters | 0 | - | 4.95 | 532,765 |
| Famous Russians | 0 | - | 4.16 | 23,918 |
| Famous Irish People | 0 | - | 4.05 | 46,075 |
| Famous Spaniards Quiz | 0 | - | 4.24 | 11,645 |
| Asian Cities A-Z by Clue | 0 | - | 4.52 | 43,044 |
| Famous Chinese People | 0 | - | 4.09 | 11,928 |
| Africa A-Z | 0 | - | 4.57 | 46,788 |
| Belize Country Quiz | 0 | - | 4.85 | 21,108 |
| Major non-NATO U.S. Allies | 0 | - | 4.52 | 52,559 |
| Midwestern States of the U.S. | 0 | - | 4.88 | 14,187 |
| European Geography By Letter - A | 0 | - | 4.52 | 148,292 |
| European Geography By Letter - B #1 | 0 | - | 4.62 | 121,690 |
| European Geography By Letter - C | 0 | - | 4.44 | 124,176 |
| European Geography By Letter - D | 0 | - | 4.49 | 118,477 |
| European Geography By Letter - L | 0 | - | 4.52 | 115,219 |
| European Geography By Letter - M | 0 | - | 4.69 | 132,710 |
| European Geography By Letter - N | 0 | - | 4.44 | 102,245 |
| European Geography By Letter - R | 0 | - | 4.43 | 94,859 |
| European Geography By Letter - V | 0 | - | 4.43 | 94,142 |
| European Geography By Letter - T | 0 | - | 4.41 | 83,734 |
| Europe Map Quiz | 0 | - | 5.00 | 4,790,628 |
| European Geography By Letter - S #1 | 0 | - | 4.63 | 101,535 |
| Famous Scottish People | 0 | - | 4.22 | 18,442 |
| Asian Geography By Letter - A | 0 | - | 4.64 | 71,500 |
| Asian Geography by Letter - H | 0 | - | 4.50 | 66,109 |
| Asian Geography By Letter - M | 0 | - | 4.48 | 61,695 |
| Asian Geography by Letter - P | 0 | - | 4.45 | 58,250 |
| Asian Geography by Letter - T | 0 | - | 4.52 | 57,691 |
| Asian Countries by First 2 Letters | 0 | - | 4.92 | 280,864 |
| Asian Geography By Letter - L | 0 | - | 4.49 | 43,347 |
| Asian Geography By Letter - O | 0 | - | 4.66 | 32,349 |
| Middle East A-Z | 0 | - | 4.47 | 46,257 |
| African Countries by First 2 Letters | 0 | - | 4.96 | 269,521 |
| 100 Most Common English Words | 0 | - | 4.88 | 1,326,647 |
| Oceania Map Quiz | 0 | - | 4.98 | 659,849 |
| Australian Capitals | 0 | - | 4.92 | 62,845 |
| U.S. Geography by Letter - N | 0 | - | 3.80 | 53,179 |
| U.S. Geography by Letter - E | 0 | - | 3.75 | 49,208 |
| U.S. Geography by Letter - F | 0 | - | 3.85 | 45,486 |
| U.S. Geography by Letter - O | 0 | - | 3.52 | 41,963 |
| Islands of the Galápagos | 0 | - | 4.54 | 4,799 |
| South American Cities on the Map | 0 | - | 4.52 | 35,566 |
| Largest Virgin Islands | 0 | - | 4.24 | 5,311 |
| U.S. State Nicknames | 0 | - | 4.47 | 50,775 |
| Countries with American Expatriates | 0 | - | 4.53 | 42,683 |
| United States Landmarks Map Quiz | 0 | - | 4.55 | 40,287 |
| United States Country Quiz | 0 | - | 4.43 | 102,271 |
| Busiest Air Routes from the U.S. | 0 | - | 4.46 | 77,084 |
| Canada Country Quiz | 0 | - | 4.55 | 133,099 |
| Canada Cities Map Quiz | 0 | - | 4.64 | 124,645 |
| Count to 10 in Europe: Pro | 0 | - | 4.86 | 69,796 |
| Official European Union Languages | 0 | - | 4.97 | 239,913 |
| European Countries in their Native Language | 0 | - | 4.99 | 158,734 |
| Europe by Borders in 30 Seconds | 0 | - | 4.98 | 431,136 |
| United Kingdom A-Z | 0 | - | 4.51 | 88,401 |
| East Asia Map Quiz | 0 | - | 4.99 | 1,452,921 |
| Asia Map Quiz | 0 | - | 4.99 | 925,927 |
| Asian Countries Americans Travel to the Most | 0 | - | 4.75 | 60,234 |
| A Quiz About Islam | 0 | - | 4.32 | 48,643 |
| Countries That Don't Recognize Israel | 0 | - | 4.68 | 35,203 |
| Africa Map Quiz | 0 | - | 5.00 | 2,129,722 |
| Most Common English Verbs - Extreme | 0 | - | 4.96 | 158,657 |
| Oceanian Capitals - Map Quiz | 0 | - | 4.96 | 51,528 |
| Australia Map Quiz | 0 | - | 4.95 | 346,319 |
| Mexico Country Quiz | 0 | - | 4.49 | 72,796 |
| History of Mexico | 0 | - | 4.52 | 15,371 |
| Paraguay... or Uruguay? | 0 | - | 4.55 | 26,790 |
| Costa Rica Country Quiz | 0 | - | 4.75 | 32,361 |
| Cuba Country Quiz | 0 | - | 4.70 | 51,772 |
| Haiti... or Dominican Republic? | 0 | - | 4.70 | 40,860 |
| Jamaica Country Quiz | 0 | - | 4.59 | 35,259 |
| Haiti Country Quiz | 0 | - | 4.79 | 32,824 |
| U.S. Federal Holidays | 0 | - | 4.33 | 99,636 |
| Top U.S. Universities | 0 | - | 4.15 | 145,899 |
| Largest United States Airlines | 0 | - | 4.39 | 55,175 |
| United States Map Quiz | 0 | - | 4.98 | 4,172,453 |
| Countries Closest to the U. S. | 0 | - | 4.41 | 210,626 |
| U.S. Federal Agency Acronyms | 0 | - | 4.50 | 80,162 |
| U.S. States by Governor | 0 | - | 4.43 | 18,117 |
| U.S. Political Parties in History | 0 | - | 4.44 | 27,772 |
| U.S. Government Agencies | 0 | - | 4.44 | 19,789 |
| Top 10 Non-English Languages of Los Angeles | 0 | - | 4.43 | 60,136 |
| 10 Closest Megacities to New York City | 0 | - | 4.52 | 67,547 |
| Events in U.S. History | 0 | - | 4.41 | 28,837 |
| New England States | 0 | - | 4.51 | 59,906 |
| U.S. License Plates Picture Quiz | 0 | - | 4.61 | 53,163 |
| U.S. States with the Fewest Immigrants | 0 | - | 4.64 | 66,130 |
| U.S. States by Land Area | 0 | - | 4.55 | 53,091 |
| Top 10 U.S. States by Inland Water Area | 0 | - | 4.53 | 38,128 |
| U.S. States with the Highest Percentage of Farmland | 0 | - | 4.80 | 65,671 |
| U.S. States with the Lowest Percentage of Farmland | 0 | - | 4.70 | 61,308 |
| Add a Letter - Make a U.S. State | 0 | - | 4.70 | 83,187 |
| Top 10 Widest U.S. States East to West | 0 | - | 4.70 | 56,307 |
| U.S. States by Borders | 0 | - | 4.62 | 35,494 |
| 10 Easternmost U.S. States | 0 | - | 4.53 | 56,698 |
| The Only U.S. State ... #1 | 0 | - | 4.52 | 102,367 |
| U.S. States with the Longest International Borders | 0 | - | 4.78 | 45,968 |
