| People in History A-Z #2 | 0 | - | 4.47 | 55,530 |
| People in History A-Z #3 | 0 | - | 4.44 | 46,489 |
| Empires A-Z | 0 | - | 4.52 | 45,507 |
| People in History A-Z #5 | 0 | - | 4.09 | 32,154 |
| Southernmost Countries A-Z | 0 | - | 4.95 | 154,207 |
| Northernmost Countries A-Z | 0 | - | 4.99 | 196,929 |
| Least Populous Countries A-Z | 0 | - | 4.99 | 171,047 |
| Biggest Countries by Area A-Z | 0 | - | 4.96 | 194,206 |
| Most Populous Countries A-Z | 0 | - | 4.98 | 302,191 |
| Countries A-Z by Neighbor | 0 | - | 5.00 | 181,427 |
| Countries with the Greatest Elevation A-Z | 0 | - | 4.83 | 73,600 |
| Name an Official Language A-Z | 0 | - | 4.91 | 177,145 |
| 20th Century A-Z | 0 | - | 4.50 | 54,034 |
| People in History A-Z #4 | 0 | - | 4.11 | 23,209 |
| 19th Century A-Z | 0 | - | 4.77 | 47,509 |
| 18th Century A-Z | 0 | - | 4.54 | 43,357 |
| 17th Century A-Z | 0 | - | 4.78 | 34,782 |
| History by Letter - A | 0 | - | 4.51 | 154,033 |
| History by Letter - B | 0 | - | 4.45 | 173,462 |
| History by Letter - C | 0 | - | 4.70 | 172,800 |
| History by Letter - E | 0 | - | 4.51 | 141,623 |
| History by Letter - G | 0 | - | 4.46 | 123,199 |
| History by Letter - H | 0 | - | 4.45 | 137,716 |
| History by Letter - J | 0 | - | 4.51 | 155,147 |
| History by Letter - N | 0 | - | 4.45 | 104,891 |
| History by Letter - S | 0 | - | 4.47 | 95,067 |
| History by Letter - W | 0 | - | 4.45 | 110,312 |
| History by Letter - M | 0 | - | 4.54 | 120,795 |
| History by Letter - K | 0 | - | 4.50 | 102,100 |
| History by Letter - L | 0 | - | 4.50 | 112,903 |
| History by Letter - I | 0 | - | 4.46 | 105,122 |
| Religion A-Z #2 | 0 | - | 4.41 | 37,150 |
| A to Z: Musical Terms | 0 | - | 4.43 | 41,591 |
| Geography A-Z #2 | 0 | - | 4.46 | 53,186 |
| Geography A-Z #5 | 0 | - | 4.44 | 37,536 |
| Geography A-Z #1 | 0 | - | 4.56 | 69,862 |
| Countries that Start with a Vowel | 0 | - | 4.99 | 155,717 |
| Geography by Letter - T | 0 | - | 4.84 | 155,472 |
| People in History by Wikipedia Descriptions #1 | 0 | - | 4.42 | 44,516 |
| People in History by Wikipedia Descriptions #2 | 0 | - | 4.42 | 39,595 |
| People in History by Wikipedia Descriptions #3 | 0 | - | 4.50 | 36,794 |
| World Cities A-Z by Clue #1 | 0 | - | 4.51 | 78,177 |
| Islands A-Z | 0 | - | 4.46 | 128,080 |
| World Cities A-Z by Clue #2 | 0 | - | 4.41 | 60,445 |
| Human Body A-Z | 0 | - | 4.51 | 130,138 |
| Asian Cities A-Z by Clue | 0 | - | 4.52 | 43,081 |
| Africa A-Z | 0 | - | 4.57 | 46,797 |
| Diseases and Medical Conditions A-Z | 0 | - | 4.70 | 58,300 |
| Ethnic Groups A-Z | 0 | - | 4.51 | 42,567 |
| 16th Century A-Z | 0 | - | 4.59 | 25,045 |
| 15th Century A-Z | 0 | - | 4.50 | 24,035 |
| 14th Century A-Z | 0 | - | 4.41 | 24,528 |
| History by Letter - D | 0 | - | 4.40 | 138,716 |
| History by Letter - F | 0 | - | 4.19 | 115,177 |
| History by Letter - O | 0 | - | 4.32 | 100,358 |
| History by Letter - P | 0 | - | 4.36 | 108,560 |
| History by Letter - Q | 0 | - | 4.34 | 80,866 |
| History by Letter - R | 0 | - | 4.26 | 122,904 |
| History by Letter - T | 0 | - | 4.39 | 105,886 |
| History by Letter - U | 0 | - | 4.19 | 101,401 |
| History by Letter - V | 0 | - | 4.27 | 81,274 |
| History by Letter - Y | 0 | - | 4.27 | 87,786 |
| History by Letter - Z | 0 | - | 4.20 | 77,521 |
| The 3rd and 4th Century | 0 | - | 4.60 | 27,365 |
| History Containing the Letter X | 0 | - | 4.47 | 27,170 |
| Disney A-Z | 0 | - | 4.37 | 87,567 |
| Companies A-Z | 0 | - | 4.30 | 42,783 |
| Religion A-Z #1 | 0 | - | 4.32 | 61,767 |
| Geography by Letter on the World Map - A-Z | 0 | - | 4.87 | 83,171 |
| Geography by Letter on the World Map - A | 0 | - | 4.81 | 109,038 |
| Video Games A-Z | 0 | - | 4.05 | 39,285 |
| Geography A-Z #3 | 0 | - | 4.22 | 39,430 |
| World Cities Based on Location A-Z - #1 | 0 | - | 4.46 | 44,583 |
| Time Magazine Person of the Year | 0 | - | 4.53 | 74,522 |
| Countries That Were Invaded | 0 | - | 4.55 | 98,311 |
| Military History A-Z | 0 | - | 4.20 | 21,270 |
| People in History by Wikipedia Descriptions #4 | 0 | - | 4.41 | 30,809 |
| Double Letters A-Z | 0 | - | 4.51 | 27,233 |
| Animals A-Z #1 | 0 | - | 4.40 | 93,973 |
| Animals A-Z #2 | 0 | - | 4.12 | 66,558 |
| Canada A-Z | 0 | - | 4.73 | 32,992 |
| Shortest Country Name A-Z | 0 | - | 4.99 | 238,975 |
| "Second Best" History Edition | 0 | - | 4.94 | 64,385 |
| Normandy D-Day Beaches | 0 | - | 4.84 | 40,782 |
| Territory Changes in World War I | 0 | - | 4.88 | 47,354 |
| Same Start and End Letter - History #1 | 0 | - | 4.18 | 24,816 |
| Same Start and End Letter - History #2 | 0 | - | 4.13 | 25,806 |
| History Ending in Z | 0 | - | 4.35 | 13,606 |
| A to Z: Musical Terms #2 | 0 | - | 4.08 | 11,133 |
| Geography A-Z #4 | 0 | - | 4.36 | 26,024 |
| Countries with the Most Borders A-Z | 0 | - | 4.98 | 125,666 |
| People Depicted in Paintings | 0 | - | 4.55 | 44,861 |
| Brand Logos That Start with A | 0 | - | 4.52 | 71,343 |
| NATO Military Alphabet | 0 | - | 4.98 | 565,093 |
| Geography by Letter - A | 0 | - | 4.75 | 213,198 |
| Geography by Letter - B | 0 | - | 4.61 | 186,089 |
| Geography by Letter - H | 0 | - | 4.69 | 151,635 |
| Geography by Letter - C | 0 | - | 4.48 | 159,960 |
| Geography by Letter - D | 0 | - | 4.50 | 151,905 |
| Geography by Letter - E | 0 | - | 4.42 | 148,735 |
| Geography by Letter - I | 0 | - | 4.42 | 122,905 |
| Geography by Letter - K | 0 | - | 4.54 | 119,387 |
| Geography by Letter - L | 0 | - | 4.44 | 149,767 |
| Geography by Letter - M | 0 | - | 4.50 | 119,744 |
| Geography by Letter - N | 0 | - | 4.51 | 128,104 |
| Geography by Letter - P | 0 | - | 4.47 | 177,064 |
| Geography by Letter - R | 0 | - | 4.43 | 132,850 |
| Geography by Letter - S #1 | 0 | - | 4.74 | 141,656 |
| Geography by Letter - U | 0 | - | 4.52 | 144,284 |
| Asian Geography By Letter - K | 0 | - | 4.75 | 58,405 |
| Geography Containing the Letter X | 0 | - | 4.42 | 34,803 |
| Geography Containing the Letter Q | 0 | - | 4.56 | 43,208 |
| Movies that Start with G | 0 | - | 4.49 | 68,856 |
| Movies that Start with I | 0 | - | 4.41 | 65,451 |
| WWII A-Z #1 | 0 | - | 4.73 | 103,464 |
| WWII A-Z #2 | 0 | - | 4.44 | 54,940 |
| Famous Battles Quiz | 0 | - | 4.21 | 49,174 |
| Name the War | 0 | - | 4.37 | 202,985 |
| Famous U.S. Generals | 0 | - | 4.27 | 38,653 |
| Famous Firsts #1 | 0 | - | 4.40 | 69,465 |
| Famous Families #1 | 0 | - | 4.20 | 83,772 |
| Names for Warriors | 0 | - | 4.40 | 37,086 |
| Famous Firsts #2 | 0 | - | 4.01 | 81,454 |
| Islam A-Z | 0 | - | 4.30 | 24,242 |
| American Football A-Z | 0 | - | 4.26 | 14,567 |
| MLB Baseball A-Z #2 | 0 | - | 4.11 | 17,167 |
| Former Countries by Territory Map | 0 | - | 4.96 | 104,208 |
| Empires by Maps | 0 | - | 4.98 | 122,537 |
| Art Works Picture Quiz #1 | 0 | - | 4.51 | 119,976 |
| Art Works Picture Quiz #2 | 0 | - | 4.49 | 106,112 |
| Art Works Picture Quiz #3 | 0 | - | 4.45 | 49,027 |
| The 7 Wonders of the Ancient World | 0 | - | 4.86 | 82,665 |
| Countries by Military Spending | 0 | - | 4.93 | 179,177 |
| 100 Most Common English Words | 0 | - | 4.88 | 1,327,501 |
| Classic Novels by Plot #2 | 0 | - | 4.86 | 38,657 |
| 12x12 Multiplication - The Whopper | 0 | - | 4.92 | 121,867 |
| Animals that Start with L | 0 | - | 4.47 | 102,544 |
| Animals that Start with P | 0 | - | 4.45 | 86,556 |
| Animals that Start with S | 0 | - | 4.49 | 87,761 |
| Geography by Letter on the World Map - B | 0 | - | 4.49 | 91,215 |
| Geography by Letter on the World Map - C | 0 | - | 4.77 | 118,704 |
| Metals of Antiquity | 0 | - | 4.95 | 94,022 |
| Historic Journeys on a World Map | 0 | - | 4.99 | 47,222 |
| Ultimate 20th Century History Quiz | 0 | - | 4.87 | 54,229 |
| Space Exploration Trivia | 0 | - | 4.38 | 35,495 |
| WWI... or WWII? | 0 | - | 4.85 | 143,803 |
| Oldest Things | 0 | - | 3.92 | 65,723 |
| Famous Homes - Who Lived There? | 0 | - | 4.09 | 26,870 |
| Famous Firsts #3 - The United States | 0 | - | 4.20 | 14,955 |
| Famous Generals - Non U.S. | 0 | - | 4.59 | 15,263 |
| Years in History #1 - Multiple Choice | 0 | - | 4.82 | 70,714 |
| Brand Logos That Start With B | 0 | - | 4.38 | 60,778 |
| Brand Logos That Start With D | 0 | - | 4.37 | 62,338 |
| Brand Logos That Start With C | 0 | - | 4.21 | 50,234 |
| Brand Logos That Start With L | 0 | - | 4.40 | 62,040 |
| Brand Logos That Start With M | 0 | - | 4.38 | 63,668 |
| Brand Logos That Start With S | 0 | - | 4.37 | 58,446 |
| Most Common English Verbs - Extreme | 0 | - | 4.96 | 158,763 |
| Literature by Letter - A | 0 | - | 4.24 | 32,410 |
| Literature by Letter - Q, X, Y, and Z | 0 | - | 4.42 | 15,436 |
| Top Five Exporting Partners by Country | 0 | - | 4.87 | 67,510 |
| Geography by Letter - G | 0 | - | 4.33 | 127,218 |
| Geography by Letter - F | 0 | - | 4.28 | 138,922 |
| Geography by Letter - J | 0 | - | 4.35 | 123,796 |
| Geography by Letter - O | 0 | - | 4.37 | 130,615 |
| Geography by Letter - V | 0 | - | 4.39 | 122,761 |
| Geography by Letter - W | 0 | - | 4.39 | 115,603 |
| Geography by Letter - Y | 0 | - | 4.39 | 112,319 |
| Geography by Letter - Z | 0 | - | 4.11 | 82,292 |
| Geography by Letter - Q | 0 | - | 4.38 | 70,197 |
| Same Start and End Letter - Geography #1 | 0 | - | 4.15 | 35,398 |
| Middle East A-Z | 0 | - | 4.47 | 46,270 |
| South America A-Z | 0 | - | 4.15 | 10,954 |
| Movies that Start with A | 0 | - | 4.13 | 62,168 |
| Movies that Start with C | 0 | - | 4.30 | 62,181 |
| Movies that Start with B | 0 | - | 4.36 | 85,733 |
| Movies that Start with D | 0 | - | 4.34 | 68,692 |
| Movies that Start with E | 0 | - | 4.13 | 68,633 |
| Movies that Start with J | 0 | - | 4.18 | 76,454 |
| Movies that Start with L | 0 | - | 4.16 | 60,633 |
| Movies that Start with M | 0 | - | 4.28 | 48,424 |
| Movies that Start with N | 0 | - | 4.02 | 41,416 |
| Movies that Start with P | 0 | - | 4.25 | 54,312 |
| Movies that Start with R | 0 | - | 4.17 | 46,847 |
| Movies that Start with W | 0 | - | 4.07 | 44,387 |
| Movies that Start with T | 0 | - | 4.34 | 49,485 |
| Movies that Start with S | 0 | - | 4.35 | 56,666 |
| Movies that Start with F | 0 | - | 4.13 | 69,118 |
| Music by Letter - F | 0 | - | 4.47 | 27,151 |
| Music by Letter - A | 0 | - | 4.61 | 31,552 |
| Influential Women in History | 0 | - | 4.43 | 36,567 |
| Google What's the Difference? - History | 0 | - | 4.20 | 46,407 |
| Cradles of Civilization | 0 | - | 4.46 | 40,543 |
| Materials From History #1 | 0 | - | 4.56 | 52,122 |
| Materials From History #2 | 0 | - | 4.59 | 31,625 |
| Mythical Creatures Quiz #1 | 0 | - | 4.92 | 710,675 |
| Notable People of WWII | 0 | - | 4.53 | 86,635 |
| WWII Trivia #2 | 0 | - | 4.52 | 104,705 |
| World War I Quiz | 0 | - | 4.78 | 102,163 |
| WWI A-Z | 0 | - | 4.51 | 38,661 |
