| 18th Century A-Z | 0 | - | 4.54 | 42,716 |
| 16th Century A-Z | 0 | - | 4.58 | 24,443 |
| 15th Century A-Z | 0 | - | 4.49 | 23,435 |
| 14th Century A-Z | 0 | - | 4.41 | 23,867 |
| 17th Century A-Z | 0 | - | 4.78 | 34,232 |
| Southernmost Countries A-Z | 0 | - | 4.94 | 152,987 |
| Northernmost Countries A-Z | 0 | - | 4.99 | 194,422 |
| Least Populous Countries A-Z | 0 | - | 4.99 | 169,675 |
| Biggest Countries by Area A-Z | 0 | - | 4.96 | 191,297 |
| Most Populous Countries A-Z | 0 | - | 4.98 | 299,862 |
| Countries A-Z by Neighbor | 0 | - | 5.00 | 179,688 |
| Countries with the Greatest Elevation A-Z | 0 | - | 4.83 | 72,403 |
| Shortest Country Name A-Z | 0 | - | 5.00 | 235,668 |
| Name an Official Language A-Z | 0 | - | 4.91 | 175,277 |
| Countries with the Most Borders A-Z | 0 | - | 4.98 | 125,036 |
| Empires A-Z | 0 | - | 4.51 | 44,980 |
| History by Letter - A | 0 | - | 4.51 | 152,459 |
| History by Letter - B | 0 | - | 4.45 | 171,654 |
| History by Letter - C | 0 | - | 4.70 | 170,783 |
| History by Letter - E | 0 | - | 4.51 | 140,170 |
| History by Letter - G | 0 | - | 4.46 | 121,720 |
| History by Letter - H | 0 | - | 4.45 | 136,173 |
| History by Letter - J | 0 | - | 4.51 | 153,581 |
| History by Letter - N | 0 | - | 4.45 | 103,611 |
| History by Letter - S | 0 | - | 4.47 | 93,865 |
| History by Letter - W | 0 | - | 4.45 | 108,987 |
| History by Letter - M | 0 | - | 4.54 | 119,351 |
| History by Letter - K | 0 | - | 4.50 | 101,041 |
| History by Letter - L | 0 | - | 4.50 | 111,748 |
| History by Letter - I | 0 | - | 4.46 | 103,902 |
| Countries that Start with a Vowel | 0 | - | 4.99 | 129,326 |
| Geography by Letter - T | 0 | - | 4.84 | 152,998 |
| People in History A-Z #1 | 0 | - | 4.61 | 98,804 |
| People in History A-Z #2 | 0 | - | 4.47 | 54,937 |
| People in History A-Z #3 | 0 | - | 4.44 | 46,053 |
| World Cities A-Z by Clue #1 | 0 | - | 4.50 | 67,255 |
| Islands A-Z | 0 | - | 4.46 | 117,105 |
| Human Body A-Z | 0 | - | 4.51 | 128,851 |
| Asian Cities A-Z by Clue | 0 | - | 4.52 | 35,119 |
| Animals A-Z #1 | 0 | - | 4.41 | 93,009 |
| Africa A-Z | 0 | - | 4.57 | 46,491 |
| Diseases and Medical Conditions A-Z | 0 | - | 4.68 | 57,169 |
| Name a Valid Year in History | 0 | - | 4.93 | 66,722 |
| History by Letter - D | 0 | - | 4.39 | 137,170 |
| History by Letter - F | 0 | - | 4.18 | 113,913 |
| History by Letter - O | 0 | - | 4.32 | 99,238 |
| History by Letter - P | 0 | - | 4.39 | 107,540 |
| History by Letter - Q | 0 | - | 4.34 | 80,126 |
| History by Letter - R | 0 | - | 4.26 | 121,879 |
| History by Letter - T | 0 | - | 4.39 | 105,032 |
| History by Letter - U | 0 | - | 4.19 | 100,552 |
| History by Letter - V | 0 | - | 4.27 | 80,542 |
| History by Letter - Y | 0 | - | 4.27 | 87,079 |
| History by Letter - Z | 0 | - | 4.18 | 76,865 |
| The 3rd and 4th Century | 0 | - | 4.60 | 27,177 |
| Geography by Letter on the World Map - A-Z | 0 | - | 4.89 | 81,614 |
| Geography by Letter on the World Map - A | 0 | - | 4.81 | 107,302 |
| Middle East A-Z | 0 | - | 4.47 | 45,908 |
| World Cities Based on Location A-Z - #1 | 0 | - | 4.45 | 44,232 |
| Military History A-Z | 0 | - | 4.20 | 21,092 |
| Time Magazine Person of the Year | 0 | - | 4.53 | 73,793 |
| Countries That Were Invaded | 0 | - | 4.55 | 97,148 |
| People in History A-Z #5 | 0 | - | 4.09 | 31,863 |
| Double Letters A-Z | 0 | - | 4.51 | 27,110 |
| World Cities A-Z by Clue #2 | 0 | - | 4.40 | 58,517 |
| Animals A-Z #2 | 0 | - | 4.12 | 66,162 |
| Canada A-Z | 0 | - | 4.73 | 32,716 |
| Normandy D-Day Beaches | 0 | - | 4.83 | 40,247 |
| Territory Changes in World War I | 0 | - | 4.87 | 46,441 |
| Same Start and End Letter - History #1 | 0 | - | 4.17 | 24,700 |
| Same Start and End Letter - History #2 | 0 | - | 4.13 | 25,600 |
| People Depicted in Paintings | 0 | - | 4.54 | 44,488 |
| WWII A-Z #1 | 0 | - | 4.80 | 102,655 |
| WWII A-Z #2 | 0 | - | 4.44 | 54,477 |
| People in History A-Z #4 | 0 | - | 4.10 | 22,971 |
| NATO Military Alphabet | 0 | - | 4.98 | 556,510 |
| 12 x 12 Multiplication Table in 2 Minutes | 0 | - | 4.81 | 799,516 |
| Religion A-Z #2 | 0 | - | 4.41 | 36,909 |
| Geography by Letter - A | 0 | - | 4.74 | 210,865 |
| Geography by Letter - B | 0 | - | 4.56 | 183,818 |
| Geography by Letter - H | 0 | - | 4.69 | 149,674 |
| Geography by Letter - C | 0 | - | 4.47 | 158,031 |
| Geography by Letter - D | 0 | - | 4.50 | 149,918 |
| Geography by Letter - E | 0 | - | 4.42 | 147,043 |
| Geography by Letter - I | 0 | - | 4.42 | 121,528 |
| Geography by Letter - K | 0 | - | 4.53 | 117,652 |
| Geography by Letter - L | 0 | - | 4.43 | 148,003 |
| Geography by Letter - M | 0 | - | 4.49 | 118,173 |
| Geography by Letter - N | 0 | - | 4.51 | 126,604 |
| Geography by Letter - P | 0 | - | 4.47 | 175,521 |
| Geography by Letter - R | 0 | - | 4.44 | 130,795 |
| Geography by Letter - S #1 | 0 | - | 4.74 | 140,012 |
| Geography by Letter - U | 0 | - | 4.53 | 142,497 |
| Asian Geography By Letter - K | 0 | - | 4.74 | 58,044 |
| Geography Containing the Letter X | 0 | - | 4.42 | 34,520 |
| American Football A-Z | 0 | - | 4.26 | 14,489 |
| MLB Baseball A-Z #2 | 0 | - | 4.11 | 17,048 |
| A to Z: Musical Terms | 0 | - | 4.43 | 41,194 |
| Geography A-Z #2 | 0 | - | 4.46 | 52,776 |
| Switzerland A-Z | 0 | - | 4.45 | 25,571 |
| Geography A-Z #5 | 0 | - | 4.47 | 37,251 |
| Geography A-Z #1 | 0 | - | 4.56 | 69,439 |
| Movies that Start with G | 0 | - | 4.49 | 68,383 |
| Movies that Start with I | 0 | - | 4.41 | 65,036 |
| Brand Logos That Start with A | 0 | - | 4.51 | 69,721 |
| Brand Logos That Start With M | 0 | - | 4.45 | 62,184 |
| Former Countries by Territory Map | 0 | - | 4.96 | 102,096 |
| Empires by Maps | 0 | - | 4.98 | 119,258 |
| Art Works Picture Quiz #1 | 0 | - | 4.51 | 118,725 |
| Art Works Picture Quiz #2 | 0 | - | 4.49 | 104,970 |
| Art Works Picture Quiz #3 | 0 | - | 4.45 | 48,620 |
| Ultimate 20th Century History Quiz | 0 | - | 4.86 | 53,435 |
| WWI... or WWII? | 0 | - | 4.85 | 141,343 |
| Famous Battles Quiz | 0 | - | 4.21 | 48,911 |
| Name the War | 0 | - | 4.37 | 201,183 |
| Famous U.S. Generals | 0 | - | 4.27 | 38,467 |
| Famous Firsts #1 | 0 | - | 4.40 | 68,945 |
| Famous Families #1 | 0 | - | 4.20 | 83,491 |
| Names for Warriors | 0 | - | 4.40 | 36,858 |
| Famous Firsts #2 | 0 | - | 4.01 | 80,931 |
| The 7 Wonders of the Ancient World | 0 | - | 4.85 | 82,221 |
| 2010s Decade Quiz | 0 | - | 4.53 | 101,506 |
| People in History by Wikipedia Descriptions #1 | 0 | - | 4.42 | 44,286 |
| People in History by Wikipedia Descriptions #2 | 0 | - | 4.42 | 39,402 |
| People in History by Wikipedia Descriptions #3 | 0 | - | 4.50 | 36,634 |
| Countries by Military Spending | 0 | - | 4.93 | 176,933 |
| Classic Novels by Plot #2 | 0 | - | 4.87 | 37,713 |
| 12x12 Multiplication - The Whopper | 0 | - | 4.92 | 120,078 |
| Animals that Start with L | 0 | - | 4.47 | 101,674 |
| Animals that Start with P | 0 | - | 4.45 | 85,925 |
| Animals that Start with S | 0 | - | 4.49 | 87,113 |
| Geography by Letter on the World Map - B | 0 | - | 4.52 | 89,926 |
| Geography by Letter on the World Map - C | 0 | - | 4.78 | 116,972 |
| Ethnic Groups A-Z | 0 | - | 4.50 | 42,143 |
| Space Exploration Trivia | 0 | - | 4.38 | 35,253 |
| Famous Generals - Non U.S. | 0 | - | 4.58 | 15,067 |
| 100 Most Common English Words | 0 | - | 4.88 | 1,309,817 |
| Disney A-Z | 0 | - | 4.37 | 86,796 |
| Literature by Letter - A | 0 | - | 4.23 | 31,824 |
| Literature by Letter - Q, X, Y, and Z | 0 | - | 4.42 | 15,098 |
| Companies A-Z | 0 | - | 4.30 | 42,648 |
| Religion A-Z #1 | 0 | - | 4.32 | 61,547 |
| Geography by Letter - G | 0 | - | 4.35 | 125,802 |
| Geography by Letter - F | 0 | - | 4.27 | 137,386 |
| Geography by Letter - J | 0 | - | 4.34 | 122,471 |
| Geography by Letter - O | 0 | - | 4.37 | 129,314 |
| Geography by Letter - V | 0 | - | 4.39 | 121,276 |
| Geography by Letter - W | 0 | - | 4.39 | 114,477 |
| Geography by Letter - Y | 0 | - | 4.39 | 110,955 |
| Geography by Letter - Z | 0 | - | 4.11 | 81,294 |
| Geography by Letter - Q | 0 | - | 4.38 | 69,130 |
| Same Start and End Letter - Geography #1 | 0 | - | 4.18 | 35,168 |
| Video Games A-Z | 0 | - | 4.08 | 38,820 |
| Geography A-Z #3 | 0 | - | 4.22 | 39,144 |
| South America A-Z | 0 | - | 4.13 | 10,872 |
| Movies that Start with A | 0 | - | 4.13 | 61,755 |
| Movies that Start with C | 0 | - | 4.30 | 61,697 |
| Movies that Start with B | 0 | - | 4.36 | 85,055 |
| Movies that Start with D | 0 | - | 4.34 | 68,327 |
| Movies that Start with E | 0 | - | 4.13 | 68,262 |
| Movies that Start with J | 0 | - | 4.18 | 76,028 |
| Movies that Start with L | 0 | - | 4.16 | 60,308 |
| Movies that Start with M | 0 | - | 4.28 | 48,144 |
| Movies that Start with N | 0 | - | 4.02 | 41,183 |
| Movies that Start with P | 0 | - | 4.25 | 54,076 |
| Movies that Start with R | 0 | - | 4.17 | 46,548 |
| Movies that Start with W | 0 | - | 4.07 | 44,195 |
| Movies that Start with T | 0 | - | 4.34 | 49,207 |
| Movies that Start with S | 0 | - | 4.35 | 56,367 |
| Movies that Start with F | 0 | - | 4.13 | 68,745 |
| Music by Letter - F | 0 | - | 4.48 | 26,914 |
| Music by Letter - A | 0 | - | 4.61 | 31,278 |
| Brand Logos That Start With B | 0 | - | 4.38 | 59,573 |
| Brand Logos That Start With D | 0 | - | 4.37 | 61,073 |
| Brand Logos That Start With C | 0 | - | 4.17 | 49,285 |
| Brand Logos That Start With L | 0 | - | 4.39 | 60,609 |
| Brand Logos That Start With S | 0 | - | 4.37 | 57,107 |
| Google What's the Difference? - History | 0 | - | 4.20 | 46,119 |
| Metals of Antiquity | 0 | - | 4.94 | 93,109 |
| Historic Journeys on a World Map | 0 | - | 4.99 | 46,403 |
| Mythical Creatures Quiz #1 | 0 | - | 4.92 | 705,632 |
| Notable People of WWII | 0 | - | 4.53 | 85,465 |
| WWII Trivia #2 | 0 | - | 4.52 | 103,688 |
| World War I Quiz | 0 | - | 4.78 | 100,538 |
| WWI A-Z | 0 | - | 4.50 | 38,143 |
| Oldest Things | 0 | - | 3.92 | 65,628 |
| Famous Homes - Who Lived There? | 0 | - | 4.09 | 26,789 |
| Famous Firsts #3 - The United States | 0 | - | 4.19 | 14,581 |
| 1970s Decade Quiz | 0 | - | 4.20 | 52,497 |
| 2000s Decade Quiz | 0 | - | 4.23 | 120,580 |
| 1980s Decade Quiz | 0 | - | 4.38 | 76,598 |
| 1990s Decade Quiz | 0 | - | 4.01 | 56,993 |
| 1850s Decade Quiz | 0 | - | 4.42 | 35,045 |
| 1790s Decade Quiz | 0 | - | 4.55 | 33,493 |
| 1800s Decade Quiz | 0 | - | 4.47 | 31,778 |
| Years in History #1 - Multiple Choice | 0 | - | 4.85 | 69,999 |
| Star Wars A-Z | 0 | - | 4.46 | 87,612 |
| Most Common English Verbs - Extreme | 0 | - | 4.96 | 156,360 |
| Top Five Exporting Partners by Country | 0 | - | 4.87 | 66,973 |
| Musical Acts by Letter - J | 0 | - | 4.17 | 77,302 |
