| 19th Century A-Z | 0 | - | 4.77 | 47,365 |
| 16th Century A-Z | 0 | - | 4.58 | 24,943 |
| 15th Century A-Z | 0 | - | 4.49 | 23,961 |
| 14th Century A-Z | 0 | - | 4.41 | 24,426 |
| 17th Century A-Z | 0 | - | 4.78 | 34,683 |
| Southernmost Countries A-Z | 0 | - | 4.95 | 153,776 |
| Northernmost Countries A-Z | 0 | - | 4.99 | 196,056 |
| Least Populous Countries A-Z | 0 | - | 4.99 | 170,538 |
| Biggest Countries by Area A-Z | 0 | - | 4.96 | 192,775 |
| Most Populous Countries A-Z | 0 | - | 4.98 | 301,305 |
| Countries A-Z by Neighbor | 0 | - | 5.00 | 180,770 |
| Countries with the Greatest Elevation A-Z | 0 | - | 4.83 | 73,120 |
| Shortest Country Name A-Z | 0 | - | 4.99 | 237,696 |
| Name an Official Language A-Z | 0 | - | 4.91 | 176,306 |
| Countries with the Most Borders A-Z | 0 | - | 4.98 | 125,427 |
| Empires A-Z | 0 | - | 4.52 | 45,271 |
| History by Letter - A | 0 | - | 4.51 | 153,437 |
| History by Letter - B | 0 | - | 4.45 | 172,752 |
| History by Letter - C | 0 | - | 4.70 | 172,033 |
| History by Letter - E | 0 | - | 4.51 | 141,043 |
| History by Letter - G | 0 | - | 4.46 | 122,498 |
| History by Letter - H | 0 | - | 4.45 | 137,129 |
| History by Letter - J | 0 | - | 4.51 | 154,500 |
| History by Letter - N | 0 | - | 4.45 | 104,378 |
| History by Letter - S | 0 | - | 4.47 | 94,673 |
| History by Letter - W | 0 | - | 4.45 | 109,861 |
| History by Letter - M | 0 | - | 4.54 | 120,183 |
| History by Letter - K | 0 | - | 4.50 | 101,669 |
| History by Letter - L | 0 | - | 4.50 | 112,439 |
| History by Letter - I | 0 | - | 4.46 | 104,711 |
| Countries that Start with a Vowel | 0 | - | 4.99 | 153,986 |
| Geography by Letter - T | 0 | - | 4.84 | 154,397 |
| People in History A-Z #1 | 0 | - | 4.63 | 99,184 |
| People in History A-Z #2 | 0 | - | 4.47 | 55,214 |
| People in History A-Z #3 | 0 | - | 4.44 | 46,259 |
| World Cities A-Z by Clue #1 | 0 | - | 4.51 | 68,438 |
| Islands A-Z | 0 | - | 4.46 | 125,733 |
| World Cities A-Z by Clue #2 | 0 | - | 4.41 | 59,288 |
| Human Body A-Z | 0 | - | 4.51 | 129,375 |
| Asian Cities A-Z by Clue | 0 | - | 4.51 | 42,261 |
| Animals A-Z #1 | 0 | - | 4.41 | 93,743 |
| Africa A-Z | 0 | - | 4.57 | 46,680 |
| Diseases and Medical Conditions A-Z | 0 | - | 4.70 | 57,958 |
| Name a Valid Year in History | 0 | - | 4.93 | 67,470 |
| History by Letter - D | 0 | - | 4.40 | 138,164 |
| History by Letter - F | 0 | - | 4.18 | 114,760 |
| History by Letter - O | 0 | - | 4.32 | 99,778 |
| History by Letter - P | 0 | - | 4.36 | 108,130 |
| History by Letter - Q | 0 | - | 4.34 | 80,540 |
| History by Letter - R | 0 | - | 4.26 | 122,487 |
| History by Letter - T | 0 | - | 4.39 | 105,537 |
| History by Letter - U | 0 | - | 4.19 | 101,047 |
| History by Letter - V | 0 | - | 4.27 | 80,979 |
| History by Letter - Y | 0 | - | 4.27 | 87,496 |
| History by Letter - Z | 0 | - | 4.20 | 77,244 |
| The 3rd and 4th Century | 0 | - | 4.60 | 27,287 |
| History Containing the Letter X | 0 | - | 4.47 | 27,089 |
| Geography by Letter on the World Map - A-Z | 0 | - | 4.89 | 82,529 |
| Geography by Letter on the World Map - A | 0 | - | 4.81 | 108,330 |
| Middle East A-Z | 0 | - | 4.47 | 46,148 |
| World Cities Based on Location A-Z - #1 | 0 | - | 4.45 | 44,424 |
| Military History A-Z | 0 | - | 4.20 | 21,193 |
| Time Magazine Person of the Year | 0 | - | 4.53 | 74,211 |
| Countries That Were Invaded | 0 | - | 4.55 | 97,560 |
| People in History A-Z #5 | 0 | - | 4.09 | 32,004 |
| Double Letters A-Z | 0 | - | 4.51 | 27,174 |
| Animals A-Z #2 | 0 | - | 4.12 | 66,433 |
| Canada A-Z | 0 | - | 4.73 | 32,889 |
| Normandy D-Day Beaches | 0 | - | 4.83 | 40,507 |
| Territory Changes in World War I | 0 | - | 4.87 | 46,917 |
| Same Start and End Letter - History #1 | 0 | - | 4.18 | 24,760 |
| Same Start and End Letter - History #2 | 0 | - | 4.13 | 25,717 |
| People Depicted in Paintings | 0 | - | 4.55 | 44,716 |
| WWII A-Z #1 | 0 | - | 4.73 | 103,126 |
| WWII A-Z #2 | 0 | - | 4.44 | 54,748 |
| People in History A-Z #4 | 0 | - | 4.11 | 23,072 |
| NATO Military Alphabet | 0 | - | 4.98 | 561,467 |
| Religion A-Z #2 | 0 | - | 4.41 | 37,042 |
| Geography by Letter - A | 0 | - | 4.74 | 212,099 |
| Geography by Letter - B | 0 | - | 4.56 | 185,103 |
| Geography by Letter - H | 0 | - | 4.69 | 150,709 |
| Geography by Letter - C | 0 | - | 4.47 | 159,123 |
| Geography by Letter - D | 0 | - | 4.50 | 151,090 |
| Geography by Letter - E | 0 | - | 4.42 | 147,985 |
| Geography by Letter - I | 0 | - | 4.42 | 122,312 |
| Geography by Letter - K | 0 | - | 4.53 | 118,671 |
| Geography by Letter - L | 0 | - | 4.43 | 148,870 |
| Geography by Letter - M | 0 | - | 4.49 | 118,944 |
| Geography by Letter - N | 0 | - | 4.51 | 127,500 |
| Geography by Letter - P | 0 | - | 4.47 | 176,398 |
| Geography by Letter - R | 0 | - | 4.43 | 132,075 |
| Geography by Letter - S #1 | 0 | - | 4.74 | 140,934 |
| Geography by Letter - U | 0 | - | 4.53 | 143,463 |
| Asian Geography By Letter - K | 0 | - | 4.74 | 58,225 |
| Geography Containing the Letter X | 0 | - | 4.42 | 34,700 |
| American Football A-Z | 0 | - | 4.26 | 14,537 |
| MLB Baseball A-Z #2 | 0 | - | 4.11 | 17,123 |
| A to Z: Musical Terms | 0 | - | 4.43 | 41,413 |
| Geography A-Z #2 | 0 | - | 4.46 | 52,993 |
| Switzerland A-Z | 0 | - | 4.45 | 25,689 |
| Geography A-Z #5 | 0 | - | 4.44 | 37,418 |
| Geography A-Z #1 | 0 | - | 4.56 | 69,675 |
| Movies that Start with G | 0 | - | 4.49 | 68,630 |
| Movies that Start with I | 0 | - | 4.41 | 65,239 |
| Brand Logos That Start with A | 0 | - | 4.52 | 70,669 |
| Former Countries by Territory Map | 0 | - | 4.96 | 103,114 |
| Empires by Maps | 0 | - | 4.98 | 120,955 |
| Art Works Picture Quiz #1 | 0 | - | 4.51 | 119,475 |
| Art Works Picture Quiz #2 | 0 | - | 4.49 | 105,540 |
| Art Works Picture Quiz #3 | 0 | - | 4.45 | 48,835 |
| Ultimate 20th Century History Quiz | 0 | - | 4.87 | 53,876 |
| WWI... or WWII? | 0 | - | 4.85 | 142,626 |
| Famous Battles Quiz | 0 | - | 4.21 | 49,037 |
| Name the War | 0 | - | 4.37 | 202,269 |
| Famous U.S. Generals | 0 | - | 4.27 | 38,573 |
| Famous Firsts #1 | 0 | - | 4.40 | 69,119 |
| Famous Families #1 | 0 | - | 4.20 | 83,655 |
| Names for Warriors | 0 | - | 4.40 | 36,979 |
| Famous Firsts #2 | 0 | - | 4.01 | 81,090 |
| The 7 Wonders of the Ancient World | 0 | - | 4.85 | 82,472 |
| 2010s Decade Quiz | 0 | - | 4.53 | 103,086 |
| People in History by Wikipedia Descriptions #1 | 0 | - | 4.42 | 44,408 |
| People in History by Wikipedia Descriptions #2 | 0 | - | 4.42 | 39,506 |
| People in History by Wikipedia Descriptions #3 | 0 | - | 4.50 | 36,716 |
| Countries by Military Spending | 0 | - | 4.93 | 178,374 |
| Classic Novels by Plot #2 | 0 | - | 4.86 | 38,248 |
| 12x12 Multiplication - The Whopper | 0 | - | 4.92 | 121,162 |
| Animals that Start with L | 0 | - | 4.47 | 102,253 |
| Animals that Start with P | 0 | - | 4.45 | 86,303 |
| Animals that Start with S | 0 | - | 4.49 | 87,509 |
| Geography by Letter on the World Map - B | 0 | - | 4.52 | 90,696 |
| Geography by Letter on the World Map - C | 0 | - | 4.77 | 118,002 |
| Ethnic Groups A-Z | 0 | - | 4.51 | 42,365 |
| Space Exploration Trivia | 0 | - | 4.38 | 35,403 |
| Famous Generals - Non U.S. | 0 | - | 4.59 | 15,173 |
| 100 Most Common English Words | 0 | - | 4.88 | 1,319,777 |
| Disney A-Z | 0 | - | 4.37 | 87,270 |
| Literature by Letter - A | 0 | - | 4.24 | 32,224 |
| Literature by Letter - Q, X, Y, and Z | 0 | - | 4.42 | 15,333 |
| Companies A-Z | 0 | - | 4.30 | 42,724 |
| Religion A-Z #1 | 0 | - | 4.32 | 61,670 |
| Geography by Letter - G | 0 | - | 4.33 | 126,612 |
| Geography by Letter - F | 0 | - | 4.27 | 138,178 |
| Geography by Letter - J | 0 | - | 4.34 | 123,231 |
| Geography by Letter - O | 0 | - | 4.37 | 130,055 |
| Geography by Letter - V | 0 | - | 4.39 | 122,098 |
| Geography by Letter - W | 0 | - | 4.39 | 115,108 |
| Geography by Letter - Y | 0 | - | 4.39 | 111,819 |
| Geography by Letter - Z | 0 | - | 4.11 | 81,870 |
| Geography by Letter - Q | 0 | - | 4.38 | 69,730 |
| Same Start and End Letter - Geography #1 | 0 | - | 4.15 | 35,309 |
| Video Games A-Z | 0 | - | 4.08 | 39,089 |
| Geography A-Z #3 | 0 | - | 4.22 | 39,318 |
| South America A-Z | 0 | - | 4.13 | 10,922 |
| Movies that Start with A | 0 | - | 4.13 | 61,944 |
| Movies that Start with C | 0 | - | 4.30 | 61,938 |
| Movies that Start with B | 0 | - | 4.36 | 85,320 |
| Movies that Start with D | 0 | - | 4.34 | 68,508 |
| Movies that Start with E | 0 | - | 4.13 | 68,438 |
| Movies that Start with J | 0 | - | 4.18 | 76,253 |
| Movies that Start with L | 0 | - | 4.16 | 60,481 |
| Movies that Start with M | 0 | - | 4.28 | 48,289 |
| Movies that Start with N | 0 | - | 4.02 | 41,301 |
| Movies that Start with P | 0 | - | 4.25 | 54,195 |
| Movies that Start with R | 0 | - | 4.17 | 46,697 |
| Movies that Start with W | 0 | - | 4.07 | 44,293 |
| Movies that Start with T | 0 | - | 4.34 | 49,361 |
| Movies that Start with S | 0 | - | 4.35 | 56,537 |
| Movies that Start with F | 0 | - | 4.13 | 68,929 |
| Music by Letter - F | 0 | - | 4.48 | 27,050 |
| Music by Letter - A | 0 | - | 4.61 | 31,436 |
| Brand Logos That Start With B | 0 | - | 4.38 | 60,250 |
| Brand Logos That Start With D | 0 | - | 4.35 | 61,806 |
| Brand Logos That Start With C | 0 | - | 4.20 | 49,856 |
| Brand Logos That Start With L | 0 | - | 4.39 | 61,438 |
| Brand Logos That Start With M | 0 | - | 4.40 | 63,101 |
| Brand Logos That Start With S | 0 | - | 4.37 | 57,884 |
| Google What's the Difference? - History | 0 | - | 4.20 | 46,294 |
| Metals of Antiquity | 0 | - | 4.95 | 93,613 |
| Historic Journeys on a World Map | 0 | - | 4.99 | 46,872 |
| Mythical Creatures Quiz #1 | 0 | - | 4.92 | 708,556 |
| Notable People of WWII | 0 | - | 4.53 | 86,028 |
| WWII Trivia #2 | 0 | - | 4.52 | 104,306 |
| World War I Quiz | 0 | - | 4.78 | 101,448 |
| WWI A-Z | 0 | - | 4.51 | 38,434 |
| Oldest Things | 0 | - | 3.92 | 65,672 |
| Famous Homes - Who Lived There? | 0 | - | 4.09 | 26,835 |
| Famous Firsts #3 - The United States | 0 | - | 4.19 | 14,670 |
| 1970s Decade Quiz | 0 | - | 4.20 | 53,411 |
| 2000s Decade Quiz | 0 | - | 4.23 | 122,374 |
| 1980s Decade Quiz | 0 | - | 4.37 | 85,238 |
| 1850s Decade Quiz | 0 | - | 4.42 | 35,296 |
| 1790s Decade Quiz | 0 | - | 4.55 | 33,739 |
| 1800s Decade Quiz | 0 | - | 4.47 | 32,017 |
| Years in History #1 - Multiple Choice | 0 | - | 4.85 | 70,403 |
| People in History by Wikipedia Descriptions #4 | 0 | - | 4.41 | 30,756 |
| Star Wars A-Z | 0 | - | 4.46 | 88,446 |
| Most Common English Verbs - Extreme | 0 | - | 4.96 | 157,634 |
| Top Five Exporting Partners by Country | 0 | - | 4.87 | 67,244 |
| Musical Acts by Letter - J | 0 | - | 4.17 | 77,540 |
