| History by Letter - B | 0 | - | 4.48 | 154,711 |
| History by Letter - C | 0 | - | 4.76 | 152,143 |
| History by Letter - E | 0 | - | 4.50 | 126,222 |
| History by Letter - G | 0 | - | 4.48 | 109,546 |
| History by Letter - H | 0 | - | 4.42 | 122,257 |
| History by Letter - J | 0 | - | 4.49 | 138,704 |
| History by Letter - N | 0 | - | 4.47 | 93,224 |
| History by Letter - S | 0 | - | 4.46 | 83,983 |
| History by Letter - W | 0 | - | 4.44 | 97,361 |
| History by Letter - M | 0 | - | 4.55 | 108,255 |
| History by Letter - K | 0 | - | 4.48 | 91,335 |
| History by Letter - L | 0 | - | 4.47 | 101,169 |
| History by Letter - I | 0 | - | 4.51 | 94,169 |
| 19th Century A-Z | 0 | - | 4.82 | 34,061 |
| History by Letter - D | 0 | - | 4.34 | 124,813 |
| History by Letter - F | 0 | - | 4.17 | 103,295 |
| History by Letter - O | 0 | - | 4.28 | 90,365 |
| History by Letter - P | 0 | - | 4.37 | 97,475 |
| History by Letter - Q | 0 | - | 4.35 | 73,450 |
| History by Letter - R | 0 | - | 4.22 | 111,748 |
| History by Letter - T | 0 | - | 4.40 | 95,667 |
| History by Letter - U | 0 | - | 4.19 | 91,328 |
| History by Letter - V | 0 | - | 4.27 | 74,058 |
| History by Letter - Y | 0 | - | 4.28 | 80,357 |
| History by Letter - Z | 0 | - | 4.20 | 71,210 |
| The 3rd and 4th Century | 0 | - | 4.53 | 19,649 |
| Empires A-Z | 0 | - | 4.47 | 39,414 |
| Same Start and End Letter - History #1 | 0 | - | 4.12 | 23,293 |
| History Ending in Z | 0 | - | 4.35 | 12,425 |
| History Containing the Letter X | 0 | - | 4.28 | 13,733 |
| Countries that Start with a Vowel | 0 | - | 4.98 | 105,274 |
| Geography by Letter - T | 0 | - | 4.82 | 119,990 |
| WWII A-Z #1 | 0 | - | 4.81 | 92,557 |
| People in History A-Z #1 | 0 | - | 4.64 | 90,240 |
| People in History A-Z #2 | 0 | - | 4.46 | 49,844 |
| People in History A-Z #3 | 0 | - | 4.47 | 42,099 |
| Geography by Letter on the World Map - A-Z | 0 | - | 4.87 | 67,696 |
| Geography by Letter on the World Map - A | 0 | - | 4.81 | 90,360 |
| Geography by Letter on the World Map - C | 0 | - | 4.84 | 101,440 |
| Southernmost Countries A-Z | 0 | - | 4.94 | 139,466 |
| Northernmost Countries A-Z | 0 | - | 4.99 | 180,145 |
| Least Populous Countries A-Z | 0 | - | 4.99 | 161,029 |
| Biggest Countries by Area A-Z | 0 | - | 4.95 | 174,958 |
| Most Populous Countries A-Z | 0 | - | 4.98 | 285,630 |
| Countries A-Z by Neighbor | 0 | - | 5.00 | 166,185 |
| 20th Century A-Z | 0 | - | 4.48 | 38,408 |
| "Second Best" History Edition | 0 | - | 4.94 | 45,407 |
| Famous Empires in History | 0 | - | 4.82 | 102,063 |
| Famous Firsts #1 | 0 | - | 4.42 | 65,597 |
| Time Magazine Person of the Year | 0 | - | 4.52 | 65,705 |
| Invasions | 0 | - | 4.70 | 88,793 |
| Shortest Country Name A-Z | 0 | - | 4.99 | 212,171 |
| Name an Official Language A-Z | 0 | - | 4.91 | 133,318 |
| People Depicted in Paintings | 0 | - | 4.55 | 40,878 |
| Normandy D-Day Beaches | 0 | - | 4.82 | 36,333 |
| Territory Changes in World War I | 0 | - | 4.87 | 39,818 |
| 16th Century A-Z | 0 | - | 4.53 | 15,799 |
| 18th Century A-Z | 0 | - | 4.60 | 31,361 |
| Brand Logos That Start with A | 0 | - | 4.52 | 54,898 |
| Brand Logos That Start With B | 0 | - | 4.46 | 47,166 |
| Brand Logos That Start With M | 0 | - | 4.41 | 47,124 |
| NATO Military Alphabet | 0 | - | 4.98 | 483,237 |
| Disney A-Z | 0 | - | 4.41 | 77,334 |
| Geography by Letter - A | 0 | - | 4.66 | 190,028 |
| Geography by Letter - B | 0 | - | 4.56 | 162,768 |
| Geography by Letter - H | 0 | - | 4.73 | 131,840 |
| Geography by Letter - C | 0 | - | 4.49 | 139,935 |
| Geography by Letter - D | 0 | - | 4.47 | 133,686 |
| Geography by Letter - I | 0 | - | 4.43 | 108,532 |
| Geography by Letter - K | 0 | - | 4.53 | 104,320 |
| Geography by Letter - L | 0 | - | 4.45 | 132,599 |
| Geography by Letter - M | 0 | - | 4.47 | 99,957 |
| Geography by Letter - N | 0 | - | 4.52 | 103,755 |
| Geography by Letter - P | 0 | - | 4.43 | 149,951 |
| Geography by Letter - S #1 | 0 | - | 4.78 | 113,266 |
| Geography by Letter - U | 0 | - | 4.55 | 115,823 |
| Geography by Letter - W | 0 | - | 4.43 | 94,806 |
| Asian Geography By Letter - K | 0 | - | 4.76 | 54,402 |
| A to Z: Musical Terms | 0 | - | 4.42 | 37,380 |
| Geography A-Z #2 | 0 | - | 4.46 | 49,020 |
| Geography A-Z #5 | 0 | - | 4.41 | 34,545 |
| Geography A-Z #1 | 0 | - | 4.55 | 65,564 |
| Countries with the Most Borders A-Z | 0 | - | 4.98 | 108,628 |
| Movies that Start with G | 0 | - | 4.50 | 64,118 |
| Former Countries by Territory Map | 0 | - | 4.96 | 84,867 |
| Empires by Maps | 0 | - | 4.98 | 92,825 |
| Ultimate 20th Century History Quiz | 0 | - | 4.86 | 45,819 |
| Famous Battles Quiz | 0 | - | 4.24 | 46,518 |
| Name the War Quiz | 0 | - | 4.39 | 189,188 |
| Famous U.S. Generals | 0 | - | 4.24 | 36,883 |
| Religions by Country of Origin Quiz | 0 | - | 4.28 | 72,308 |
| Famous Families #1 | 0 | - | 4.25 | 79,152 |
| Names for Warriors | 0 | - | 4.39 | 34,444 |
| Famous Firsts #2 | 0 | - | 4.01 | 78,477 |
| People in History A-Z #5 | 0 | - | 4.10 | 29,858 |
| People in History A-Z #4 | 0 | - | 4.12 | 21,270 |
| Countries by Military Spending | 0 | - | 4.93 | 157,808 |
| 12x12 Multiplication - The Whopper | 0 | - | 4.90 | 96,483 |
| Art Works Picture Quiz #1 | 0 | - | 4.49 | 96,349 |
| Art Works Picture Quiz #2 | 0 | - | 4.45 | 85,837 |
| WWII A-Z #2 | 0 | - | 4.48 | 49,622 |
| People in History by Wikipedia Descriptions #1 | 0 | - | 4.46 | 32,138 |
| 100 Most Common English Words | 0 | - | 4.91 | 1,159,718 |
| Animals that Start with L | 0 | - | 4.43 | 93,441 |
| Animals that Start with P | 0 | - | 4.41 | 79,319 |
| Animals that Start with S | 0 | - | 4.49 | 79,966 |
| Geography by Letter on the World Map - B | 0 | - | 4.50 | 77,504 |
| World Cities A-Z #1 | 0 | - | 4.53 | 58,713 |
| Islands A-Z | 0 | - | 4.45 | 104,098 |
| World Cities A-Z #2 | 0 | - | 4.46 | 51,423 |
| Human Body A-Z | 0 | - | 4.48 | 107,686 |
| Africa A-Z | 0 | - | 4.54 | 43,541 |
| Countries with the Greatest Elevation A-Z | 0 | - | 4.70 | 53,522 |
| Diseases and Medical Conditions A-Z | 0 | - | 4.66 | 42,091 |
| Ethnic Groups A-Z | 0 | - | 4.56 | 37,891 |
| Space Exploration Trivia | 0 | - | 4.36 | 33,379 |
| 15th Century A-Z | 0 | - | 4.35 | 14,919 |
| 14th Century A-Z | 0 | - | 4.32 | 15,251 |
| 17th Century A-Z | 0 | - | 4.62 | 23,933 |
| Military History A-Z | 0 | - | 4.19 | 19,412 |
| Famous Generals - Non U.S. | 0 | - | 4.58 | 13,398 |
| Brand Logos That Start With D | 0 | - | 4.31 | 48,374 |
| Brand Logos That Start With C | 0 | - | 4.12 | 39,608 |
| Brand Logos That Start With L | 0 | - | 4.38 | 46,131 |
| Brand Logos That Start With S | 0 | - | 4.34 | 43,532 |
| Literature by Letter - Q, X, Y, and Z | 0 | - | 4.41 | 13,858 |
| Companies A-Z | 0 | - | 4.30 | 41,304 |
| Religion A-Z #1 | 0 | - | 4.25 | 44,291 |
| Religion A-Z #2 | 0 | - | 4.48 | 24,577 |
| Geography by Letter - E | 0 | - | 4.39 | 131,399 |
| Geography by Letter - G | 0 | - | 4.35 | 111,772 |
| Geography by Letter - F | 0 | - | 4.26 | 122,551 |
| Geography by Letter - J | 0 | - | 4.36 | 109,319 |
| Geography by Letter - O | 0 | - | 4.37 | 106,997 |
| Geography by Letter - R | 0 | - | 4.40 | 102,181 |
| Geography by Letter - V | 0 | - | 4.37 | 94,076 |
| Geography by Letter - Y | 0 | - | 4.37 | 90,259 |
| Geography by Letter - Z | 0 | - | 4.04 | 61,652 |
| Geography by Letter - Q | 0 | - | 4.33 | 50,654 |
| Same Start and End Letter - Geography #1 | 0 | - | 4.19 | 33,064 |
| Geography Containing the Letter Q | 0 | - | 4.52 | 30,152 |
| Video Games A-Z | 0 | - | 4.04 | 35,000 |
| Geography A-Z #3 | 0 | - | 4.21 | 36,513 |
| Movies that Start with A | 0 | - | 4.09 | 57,975 |
| Movies that Start with C | 0 | - | 4.29 | 57,212 |
| Movies that Start with B | 0 | - | 4.35 | 79,720 |
| Movies that Start with D | 0 | - | 4.35 | 65,029 |
| Movies that Start with E | 0 | - | 4.19 | 64,892 |
| Movies that Start with I | 0 | - | 4.40 | 61,137 |
| Movies that Start with J | 0 | - | 4.21 | 72,053 |
| Movies that Start with L | 0 | - | 4.16 | 57,391 |
| Movies that Start with M | 0 | - | 4.26 | 45,746 |
| Movies that Start with N | 0 | - | 4.05 | 38,953 |
| Movies that Start with P | 0 | - | 4.24 | 51,683 |
| Movies that Start with R | 0 | - | 4.13 | 43,401 |
| Movies that Start with W | 0 | - | 4.04 | 42,280 |
| Movies that Start with T | 0 | - | 4.36 | 46,529 |
| Movies that Start with S | 0 | - | 4.37 | 53,418 |
| Movies that Start with F | 0 | - | 4.15 | 65,492 |
| Music by Letter - F | 0 | - | 4.44 | 24,616 |
| Music by Letter - A | 0 | - | 4.60 | 28,637 |
| Metals of Antiquity | 0 | - | 4.94 | 84,912 |
| Cradles of Civilization | 0 | - | 4.41 | 31,825 |
| Materials From History #1 | 0 | - | 4.57 | 34,409 |
| Historic Journeys on a World Map | 0 | - | 4.99 | 39,393 |
| Mythical Creatures Quiz #1 | 0 | - | 4.91 | 652,219 |
| WWI... or WWII? | 0 | - | 4.84 | 121,799 |
| Oldest Things | 0 | - | 3.96 | 64,481 |
| Famous Homes - Who Lived There? | 0 | - | 4.06 | 26,144 |
| Biggest Nations and Empires Ever | 0 | - | 4.56 | 132,727 |
| Famous Explorers | 0 | - | 4.70 | 32,480 |
| Answers by Time Period | 0 | - | 4.49 | 42,361 |
| Territorial Accessions | 0 | - | 4.44 | 32,078 |
| Famous Firsts #3 - The United States | 0 | - | 4.17 | 13,254 |
| Years in History #1 - Multiple Choice | 0 | - | 4.83 | 62,472 |
| Most Common English Verbs - Extreme | 0 | - | 4.95 | 135,140 |
| Top Five Exporting Partners by Country | 0 | - | 4.84 | 61,542 |
| The Americas Geography by Letter - B | 0 | - | 4.50 | 48,731 |
| The Americas Geography by Letter - S | 0 | - | 4.56 | 41,429 |
| Middle East A-Z | 0 | - | 4.45 | 42,852 |
| World Cities Based on Location A-Z - #1 | 0 | - | 4.43 | 41,099 |
| Google What's the Difference? - History | 0 | - | 4.21 | 42,978 |
| Art Works Picture Quiz #3 | 0 | - | 4.38 | 40,969 |
| Notable People of WWII | 0 | - | 4.52 | 79,669 |
| WWII Trivia #2 | 0 | - | 4.50 | 85,639 |
| World War I Quiz | 0 | - | 4.79 | 91,769 |
| WWI A-Z | 0 | - | 4.47 | 35,118 |
| Most Important People in History | 0 | - | 3.98 | 46,118 |
| People in History by Wikipedia Descriptions #3 | 0 | - | 4.53 | 27,266 |
| People in History by Wikipedia Descriptions #4 | 0 | - | 4.50 | 23,945 |
| Top Arms Exporting Countries | 0 | - | 4.95 | 75,834 |
| Monarchies of the World | 0 | - | 4.93 | 152,225 |
| Countries by Hottest Recorded Temperature | 0 | - | 4.91 | 81,135 |
| Countries where the Sea Freezes | 0 | - | 4.91 | 80,794 |
| Largest Countries Without Deserts | 0 | - | 4.86 | 65,687 |
| Numbers Tile Select Quiz | 0 | - | 4.99 | 63,461 |
| Literature by Letter - A | 0 | - | 4.21 | 29,201 |
| Literature by Letter - D | 0 | - | 4.24 | 18,615 |
| Literature by Letter - C | 0 | - | 4.32 | 24,327 |
| Literature by Letter - F | 0 | - | 4.28 | 15,488 |
