| Empires A-Z | 0 | - | 4.52 | 45,398 |
| History by Letter - A | 0 | - | 4.51 | 153,747 |
| History by Letter - B | 0 | - | 4.45 | 173,115 |
| History by Letter - C | 0 | - | 4.70 | 172,450 |
| History by Letter - E | 0 | - | 4.51 | 141,349 |
| History by Letter - G | 0 | - | 4.46 | 122,766 |
| History by Letter - H | 0 | - | 4.45 | 137,435 |
| History by Letter - J | 0 | - | 4.51 | 154,845 |
| History by Letter - N | 0 | - | 4.45 | 104,694 |
| History by Letter - S | 0 | - | 4.47 | 94,866 |
| History by Letter - W | 0 | - | 4.45 | 110,099 |
| History by Letter - M | 0 | - | 4.54 | 120,568 |
| History by Letter - K | 0 | - | 4.50 | 101,891 |
| History by Letter - L | 0 | - | 4.50 | 112,688 |
| History by Letter - I | 0 | - | 4.46 | 104,915 |
| Countries that Start with a Vowel | 0 | - | 4.99 | 155,024 |
| Geography by Letter - T | 0 | - | 4.84 | 154,926 |
| People in History A-Z #1 | 0 | - | 4.63 | 99,625 |
| People in History A-Z #2 | 0 | - | 4.47 | 55,416 |
| People in History A-Z #3 | 0 | - | 4.44 | 46,409 |
| History by Letter - D | 0 | - | 4.40 | 138,458 |
| History by Letter - F | 0 | - | 4.18 | 114,981 |
| History by Letter - O | 0 | - | 4.32 | 99,975 |
| History by Letter - P | 0 | - | 4.36 | 108,355 |
| History by Letter - Q | 0 | - | 4.34 | 80,713 |
| History by Letter - R | 0 | - | 4.26 | 122,709 |
| History by Letter - T | 0 | - | 4.39 | 105,712 |
| History by Letter - U | 0 | - | 4.19 | 101,225 |
| History by Letter - V | 0 | - | 4.27 | 81,135 |
| History by Letter - Y | 0 | - | 4.27 | 87,649 |
| History by Letter - Z | 0 | - | 4.20 | 77,391 |
| The 3rd and 4th Century | 0 | - | 4.60 | 27,325 |
| Geography by Letter on the World Map - A-Z | 0 | - | 4.87 | 82,879 |
| Geography by Letter on the World Map - A | 0 | - | 4.81 | 108,716 |
| Southernmost Countries A-Z | 0 | - | 4.95 | 153,975 |
| Northernmost Countries A-Z | 0 | - | 4.99 | 196,474 |
| Least Populous Countries A-Z | 0 | - | 4.99 | 170,766 |
| Biggest Countries by Area A-Z | 0 | - | 4.96 | 193,705 |
| Most Populous Countries A-Z | 0 | - | 4.98 | 301,731 |
| Countries A-Z by Neighbor | 0 | - | 5.00 | 181,130 |
| Countries with the Greatest Elevation A-Z | 0 | - | 4.83 | 73,340 |
| 20th Century A-Z | 0 | - | 4.50 | 53,945 |
| 19th Century A-Z | 0 | - | 4.77 | 47,432 |
| 18th Century A-Z | 0 | - | 4.54 | 43,287 |
| Time Magazine Person of the Year | 0 | - | 4.53 | 74,372 |
| Countries That Were Invaded | 0 | - | 4.55 | 97,783 |
| People in History A-Z #5 | 0 | - | 4.09 | 32,101 |
| Shortest Country Name A-Z | 0 | - | 4.99 | 238,335 |
| Name an Official Language A-Z | 0 | - | 4.91 | 176,756 |
| Normandy D-Day Beaches | 0 | - | 4.83 | 40,630 |
| Territory Changes in World War I | 0 | - | 4.88 | 47,096 |
| Same Start and End Letter - History #1 | 0 | - | 4.18 | 24,794 |
| Same Start and End Letter - History #2 | 0 | - | 4.13 | 25,770 |
| Countries with the Most Borders A-Z | 0 | - | 4.98 | 125,547 |
| People Depicted in Paintings | 0 | - | 4.55 | 44,793 |
| 16th Century A-Z | 0 | - | 4.58 | 24,994 |
| 15th Century A-Z | 0 | - | 4.49 | 23,999 |
| 14th Century A-Z | 0 | - | 4.41 | 24,480 |
| 17th Century A-Z | 0 | - | 4.78 | 34,734 |
| Brand Logos That Start with A | 0 | - | 4.52 | 71,005 |
| NATO Military Alphabet | 0 | - | 4.98 | 563,518 |
| Religion A-Z #2 | 0 | - | 4.41 | 37,103 |
| Geography by Letter - A | 0 | - | 4.74 | 212,614 |
| Geography by Letter - B | 0 | - | 4.56 | 185,590 |
| Geography by Letter - H | 0 | - | 4.69 | 151,111 |
| Geography by Letter - C | 0 | - | 4.48 | 159,554 |
| Geography by Letter - D | 0 | - | 4.50 | 151,536 |
| Geography by Letter - E | 0 | - | 4.42 | 148,368 |
| Geography by Letter - I | 0 | - | 4.42 | 122,624 |
| Geography by Letter - K | 0 | - | 4.54 | 118,965 |
| Geography by Letter - L | 0 | - | 4.44 | 149,450 |
| Geography by Letter - M | 0 | - | 4.49 | 119,464 |
| Geography by Letter - N | 0 | - | 4.51 | 127,832 |
| Geography by Letter - P | 0 | - | 4.47 | 176,761 |
| Geography by Letter - R | 0 | - | 4.43 | 132,483 |
| Geography by Letter - S #1 | 0 | - | 4.74 | 141,316 |
| Geography by Letter - U | 0 | - | 4.52 | 143,794 |
| Asian Geography By Letter - K | 0 | - | 4.75 | 58,315 |
| Geography Containing the Letter X | 0 | - | 4.42 | 34,756 |
| A to Z: Musical Terms | 0 | - | 4.43 | 41,530 |
| Geography A-Z #2 | 0 | - | 4.46 | 53,100 |
| Geography A-Z #5 | 0 | - | 4.44 | 37,487 |
| Geography A-Z #1 | 0 | - | 4.56 | 69,773 |
| Movies that Start with G | 0 | - | 4.49 | 68,775 |
| Movies that Start with I | 0 | - | 4.41 | 65,379 |
| WWII A-Z #1 | 0 | - | 4.73 | 103,284 |
| WWII A-Z #2 | 0 | - | 4.44 | 54,840 |
| Famous Battles Quiz | 0 | - | 4.21 | 49,105 |
| Name the War | 0 | - | 4.37 | 202,712 |
| Famous U.S. Generals | 0 | - | 4.27 | 38,622 |
| Famous Firsts #1 | 0 | - | 4.40 | 69,408 |
| Famous Families #1 | 0 | - | 4.20 | 83,714 |
| Names for Warriors | 0 | - | 4.40 | 37,042 |
| Famous Firsts #2 | 0 | - | 4.01 | 81,396 |
| People in History A-Z #4 | 0 | - | 4.11 | 23,170 |
| Former Countries by Territory Map | 0 | - | 4.96 | 103,540 |
| Empires by Maps | 0 | - | 4.98 | 121,577 |
| Art Works Picture Quiz #1 | 0 | - | 4.51 | 119,716 |
| Art Works Picture Quiz #2 | 0 | - | 4.49 | 105,766 |
| Art Works Picture Quiz #3 | 0 | - | 4.45 | 48,929 |
| Ultimate 20th Century History Quiz | 0 | - | 4.87 | 54,047 |
| The 7 Wonders of the Ancient World | 0 | - | 4.85 | 82,551 |
| Military History A-Z | 0 | - | 4.20 | 21,232 |
| People in History by Wikipedia Descriptions #1 | 0 | - | 4.42 | 44,456 |
| People in History by Wikipedia Descriptions #2 | 0 | - | 4.42 | 39,553 |
| People in History by Wikipedia Descriptions #3 | 0 | - | 4.50 | 36,756 |
| Countries by Military Spending | 0 | - | 4.93 | 178,847 |
| 100 Most Common English Words | 0 | - | 4.88 | 1,323,852 |
| Classic Novels by Plot #2 | 0 | - | 4.86 | 38,508 |
| 12x12 Multiplication - The Whopper | 0 | - | 4.92 | 121,581 |
| Animals that Start with L | 0 | - | 4.47 | 102,374 |
| Animals that Start with P | 0 | - | 4.45 | 86,425 |
| Animals that Start with S | 0 | - | 4.49 | 87,627 |
| Geography by Letter on the World Map - B | 0 | - | 4.49 | 90,985 |
| Geography by Letter on the World Map - C | 0 | - | 4.77 | 118,408 |
| World Cities A-Z by Clue #1 | 0 | - | 4.51 | 68,944 |
| Islands A-Z | 0 | - | 4.46 | 127,023 |
| World Cities A-Z by Clue #2 | 0 | - | 4.41 | 59,478 |
| Human Body A-Z | 0 | - | 4.51 | 129,565 |
| Asian Cities A-Z by Clue | 0 | - | 4.52 | 42,909 |
| Africa A-Z | 0 | - | 4.57 | 46,750 |
| Diseases and Medical Conditions A-Z | 0 | - | 4.70 | 58,173 |
| Ethnic Groups A-Z | 0 | - | 4.51 | 42,469 |
| Metals of Antiquity | 0 | - | 4.95 | 93,817 |
| Historic Journeys on a World Map | 0 | - | 4.99 | 47,058 |
| Space Exploration Trivia | 0 | - | 4.38 | 35,462 |
| WWI... or WWII? | 0 | - | 4.85 | 143,146 |
| Oldest Things | 0 | - | 3.92 | 65,702 |
| Famous Homes - Who Lived There? | 0 | - | 4.09 | 26,855 |
| Famous Firsts #3 - The United States | 0 | - | 4.20 | 14,936 |
| Famous Generals - Non U.S. | 0 | - | 4.59 | 15,220 |
| Years in History #1 - Multiple Choice | 0 | - | 4.82 | 70,554 |
| Brand Logos That Start With B | 0 | - | 4.38 | 60,505 |
| Brand Logos That Start With D | 0 | - | 4.36 | 62,069 |
| Brand Logos That Start With C | 0 | - | 4.20 | 50,033 |
| Brand Logos That Start With L | 0 | - | 4.39 | 61,773 |
| Brand Logos That Start With M | 0 | - | 4.38 | 63,398 |
| Brand Logos That Start With S | 0 | - | 4.37 | 58,141 |
| Most Common English Verbs - Extreme | 0 | - | 4.96 | 158,307 |
| Disney A-Z | 0 | - | 4.37 | 87,424 |
| Literature by Letter - A | 0 | - | 4.24 | 32,322 |
| Literature by Letter - Q, X, Y, and Z | 0 | - | 4.42 | 15,391 |
| Companies A-Z | 0 | - | 4.30 | 42,759 |
| Top Five Exporting Partners by Country | 0 | - | 4.86 | 67,390 |
| Religion A-Z #1 | 0 | - | 4.32 | 61,722 |
| Geography by Letter - G | 0 | - | 4.33 | 126,944 |
| Geography by Letter - F | 0 | - | 4.28 | 138,665 |
| Geography by Letter - J | 0 | - | 4.35 | 123,540 |
| Geography by Letter - O | 0 | - | 4.37 | 130,359 |
| Geography by Letter - V | 0 | - | 4.39 | 122,443 |
| Geography by Letter - W | 0 | - | 4.39 | 115,371 |
| Geography by Letter - Y | 0 | - | 4.39 | 112,057 |
| Geography by Letter - Z | 0 | - | 4.11 | 82,085 |
| Geography by Letter - Q | 0 | - | 4.38 | 69,977 |
| Same Start and End Letter - Geography #1 | 0 | - | 4.15 | 35,362 |
| Video Games A-Z | 0 | - | 4.05 | 39,196 |
| Geography A-Z #3 | 0 | - | 4.22 | 39,379 |
| Middle East A-Z | 0 | - | 4.47 | 46,215 |
| World Cities Based on Location A-Z - #1 | 0 | - | 4.46 | 44,511 |
| Movies that Start with A | 0 | - | 4.13 | 62,098 |
| Movies that Start with C | 0 | - | 4.30 | 62,089 |
| Movies that Start with B | 0 | - | 4.36 | 85,657 |
| Movies that Start with D | 0 | - | 4.34 | 68,624 |
| Movies that Start with E | 0 | - | 4.13 | 68,567 |
| Movies that Start with J | 0 | - | 4.18 | 76,384 |
| Movies that Start with L | 0 | - | 4.16 | 60,572 |
| Movies that Start with M | 0 | - | 4.28 | 48,374 |
| Movies that Start with N | 0 | - | 4.02 | 41,367 |
| Movies that Start with P | 0 | - | 4.25 | 54,268 |
| Movies that Start with R | 0 | - | 4.17 | 46,787 |
| Movies that Start with W | 0 | - | 4.07 | 44,360 |
| Movies that Start with T | 0 | - | 4.34 | 49,435 |
| Movies that Start with S | 0 | - | 4.35 | 56,613 |
| Movies that Start with F | 0 | - | 4.13 | 69,049 |
| Music by Letter - F | 0 | - | 4.47 | 27,116 |
| Music by Letter - A | 0 | - | 4.61 | 31,504 |
| Influential Women in History | 0 | - | 4.42 | 36,245 |
| Google What's the Difference? - History | 0 | - | 4.20 | 46,352 |
| Cradles of Civilization | 0 | - | 4.46 | 40,190 |
| Materials From History #1 | 0 | - | 4.56 | 51,977 |
| Mythical Creatures Quiz #1 | 0 | - | 4.92 | 709,724 |
| Notable People of WWII | 0 | - | 4.53 | 86,147 |
| WWII Trivia #2 | 0 | - | 4.52 | 104,476 |
| World War I Quiz | 0 | - | 4.78 | 101,969 |
| WWI A-Z | 0 | - | 4.51 | 38,559 |
| Biggest Nations and Empires Ever | 0 | - | 4.46 | 146,463 |
| Famous Explorers | 0 | - | 4.58 | 36,308 |
| Famous Empires by Description | 0 | - | 4.73 | 118,879 |
| Answers by Time Period | 0 | - | 4.64 | 55,814 |
| People in History by Wikipedia Descriptions #4 | 0 | - | 4.41 | 30,784 |
| Star Wars A-Z | 0 | - | 4.46 | 88,699 |
| Musical Acts by Letter - J | 0 | - | 4.17 | 77,701 |
| Musical Acts by Letter - M | 0 | - | 4.15 | 93,765 |
| Musical Acts by Letter - N | 0 | - | 4.17 | 68,544 |
| Musical Acts by Letter - P | 0 | - | 4.24 | 65,656 |
| Musical Acts by Letter - R | 0 | - | 4.33 | 83,553 |
| Musical Acts by Letter - T | 0 | - | 4.15 | 68,243 |
| Musical Acts by Letter - A | 0 | - | 4.29 | 83,062 |
| Musical Acts by Letter - B | 0 | - | 4.32 | 73,614 |
| Musical Acts by Letter - C | 0 | - | 4.34 | 60,511 |
