| Empires A-Z | 0 | - | 4.51 | 44,756 |
| History by Letter - A | 0 | - | 4.51 | 151,973 |
| History by Letter - B | 0 | - | 4.45 | 171,113 |
| History by Letter - C | 0 | - | 4.69 | 170,124 |
| History by Letter - E | 0 | - | 4.51 | 139,713 |
| History by Letter - G | 0 | - | 4.45 | 121,333 |
| History by Letter - H | 0 | - | 4.45 | 135,746 |
| History by Letter - J | 0 | - | 4.51 | 153,109 |
| History by Letter - N | 0 | - | 4.44 | 103,302 |
| History by Letter - S | 0 | - | 4.47 | 93,575 |
| History by Letter - W | 0 | - | 4.45 | 108,627 |
| History by Letter - M | 0 | - | 4.54 | 118,994 |
| History by Letter - K | 0 | - | 4.50 | 100,745 |
| History by Letter - L | 0 | - | 4.49 | 111,417 |
| History by Letter - I | 0 | - | 4.46 | 103,589 |
| Countries that Start with a Vowel | 0 | - | 4.98 | 128,412 |
| Geography by Letter - T | 0 | - | 4.84 | 152,142 |
| People in History A-Z #1 | 0 | - | 4.63 | 98,516 |
| People in History A-Z #2 | 0 | - | 4.47 | 54,761 |
| People in History A-Z #3 | 0 | - | 4.44 | 45,924 |
| History by Letter - D | 0 | - | 4.39 | 136,777 |
| History by Letter - F | 0 | - | 4.18 | 113,601 |
| History by Letter - O | 0 | - | 4.31 | 98,978 |
| History by Letter - P | 0 | - | 4.38 | 107,248 |
| History by Letter - Q | 0 | - | 4.34 | 79,912 |
| History by Letter - R | 0 | - | 4.26 | 121,555 |
| History by Letter - T | 0 | - | 4.39 | 104,609 |
| History by Letter - U | 0 | - | 4.19 | 100,149 |
| History by Letter - V | 0 | - | 4.27 | 80,291 |
| History by Letter - Y | 0 | - | 4.27 | 86,865 |
| History by Letter - Z | 0 | - | 4.18 | 76,677 |
| The 3rd and 4th Century | 0 | - | 4.60 | 27,095 |
| Geography by Letter on the World Map - A-Z | 0 | - | 4.89 | 81,134 |
| Geography by Letter on the World Map - A | 0 | - | 4.81 | 106,770 |
| Southernmost Countries A-Z | 0 | - | 4.94 | 152,629 |
| Northernmost Countries A-Z | 0 | - | 4.99 | 193,756 |
| Least Populous Countries A-Z | 0 | - | 4.99 | 169,296 |
| Biggest Countries by Area A-Z | 0 | - | 4.95 | 190,549 |
| Most Populous Countries A-Z | 0 | - | 4.98 | 299,233 |
| Countries A-Z by Neighbor | 0 | - | 5.00 | 179,248 |
| Countries with the Greatest Elevation A-Z | 0 | - | 4.82 | 72,041 |
| 20th Century A-Z | 0 | - | 4.50 | 53,112 |
| 19th Century A-Z | 0 | - | 4.77 | 46,698 |
| 18th Century A-Z | 0 | - | 4.54 | 42,612 |
| Time Magazine Person of the Year | 0 | - | 4.53 | 73,474 |
| Countries That Were Invaded | 0 | - | 4.54 | 96,861 |
| People in History A-Z #5 | 0 | - | 4.09 | 31,775 |
| Shortest Country Name A-Z | 0 | - | 5.00 | 234,546 |
| Name an Official Language A-Z | 0 | - | 4.90 | 174,560 |
| Normandy D-Day Beaches | 0 | - | 4.83 | 40,065 |
| Territory Changes in World War I | 0 | - | 4.86 | 46,171 |
| Same Start and End Letter - History #1 | 0 | - | 4.16 | 24,645 |
| Same Start and End Letter - History #2 | 0 | - | 4.13 | 25,506 |
| Countries with the Most Borders A-Z | 0 | - | 4.98 | 124,831 |
| People Depicted in Paintings | 0 | - | 4.54 | 44,358 |
| 16th Century A-Z | 0 | - | 4.58 | 24,345 |
| 15th Century A-Z | 0 | - | 4.49 | 23,368 |
| 17th Century A-Z | 0 | - | 4.78 | 34,133 |
| NATO Military Alphabet | 0 | - | 4.98 | 553,321 |
| 12 x 12 Multiplication Table in 2 Minutes | 0 | - | 4.81 | 797,299 |
| Geography by Letter - A | 0 | - | 4.74 | 209,895 |
| Geography by Letter - B | 0 | - | 4.56 | 183,073 |
| Geography by Letter - H | 0 | - | 4.69 | 149,132 |
| Geography by Letter - C | 0 | - | 4.47 | 157,392 |
| Geography by Letter - D | 0 | - | 4.50 | 149,342 |
| Geography by Letter - E | 0 | - | 4.42 | 146,517 |
| Geography by Letter - I | 0 | - | 4.42 | 121,073 |
| Geography by Letter - K | 0 | - | 4.53 | 117,206 |
| Geography by Letter - L | 0 | - | 4.43 | 147,475 |
| Geography by Letter - M | 0 | - | 4.49 | 117,489 |
| Geography by Letter - N | 0 | - | 4.51 | 126,106 |
| Geography by Letter - P | 0 | - | 4.47 | 174,991 |
| Geography by Letter - R | 0 | - | 4.43 | 130,142 |
| Geography by Letter - S #1 | 0 | - | 4.74 | 139,219 |
| Geography by Letter - U | 0 | - | 4.54 | 141,893 |
| Asian Geography By Letter - K | 0 | - | 4.74 | 57,936 |
| A to Z: Musical Terms | 0 | - | 4.43 | 40,969 |
| Geography A-Z #2 | 0 | - | 4.46 | 52,654 |
| Geography A-Z #5 | 0 | - | 4.47 | 37,161 |
| Geography A-Z #1 | 0 | - | 4.56 | 69,295 |
| Movies that Start with G | 0 | - | 4.48 | 68,203 |
| Movies that Start with I | 0 | - | 4.41 | 64,840 |
| Brand Logos That Start with A | 0 | - | 4.51 | 69,112 |
| Brand Logos That Start With B | 0 | - | 4.41 | 59,072 |
| Brand Logos That Start With M | 0 | - | 4.45 | 61,624 |
| WWII A-Z #1 | 0 | - | 4.80 | 102,300 |
| WWII A-Z #2 | 0 | - | 4.44 | 54,273 |
| Famous Battles Quiz | 0 | - | 4.21 | 48,780 |
| Name the War Quiz | 0 | - | 4.37 | 200,644 |
| Famous U.S. Generals | 0 | - | 4.27 | 38,393 |
| Famous Firsts #1 | 0 | - | 4.40 | 68,802 |
| Famous Families #1 | 0 | - | 4.20 | 83,362 |
| Names for Warriors | 0 | - | 4.40 | 36,777 |
| People in History A-Z #4 | 0 | - | 4.10 | 22,897 |
| Former Countries by Territory Map | 0 | - | 4.96 | 101,290 |
| Empires by Maps | 0 | - | 4.98 | 118,127 |
| Art Works Picture Quiz #1 | 0 | - | 4.51 | 118,372 |
| Art Works Picture Quiz #2 | 0 | - | 4.49 | 104,534 |
| Art Works Picture Quiz #3 | 0 | - | 4.45 | 48,500 |
| Ultimate 20th Century History Quiz | 0 | - | 4.86 | 53,139 |
| The 7 Wonders of the Ancient World | 0 | - | 4.85 | 82,032 |
| 14th Century A-Z | 0 | - | 4.40 | 23,577 |
| Military History A-Z | 0 | - | 4.20 | 21,022 |
| People in History by Wikipedia Descriptions #1 | 0 | - | 4.42 | 44,165 |
| People in History by Wikipedia Descriptions #2 | 0 | - | 4.42 | 39,302 |
| People in History by Wikipedia Descriptions #3 | 0 | - | 4.50 | 36,569 |
| Countries by Military Spending | 0 | - | 4.93 | 176,225 |
| 100 Most Common English Words | 0 | - | 4.88 | 1,303,240 |
| Classic Novels by Plot #2 | 0 | - | 4.87 | 37,384 |
| 12x12 Multiplication - The Whopper | 0 | - | 4.92 | 119,552 |
| Animals that Start with L | 0 | - | 4.47 | 101,187 |
| Animals that Start with P | 0 | - | 4.45 | 85,587 |
| Animals that Start with S | 0 | - | 4.49 | 86,757 |
| Geography by Letter on the World Map - B | 0 | - | 4.52 | 89,524 |
| Geography by Letter on the World Map - C | 0 | - | 4.78 | 116,471 |
| World Cities A-Z by Clue #1 | 0 | - | 4.61 | 63,700 |
| Islands A-Z | 0 | - | 4.46 | 116,636 |
| World Cities A-Z by Clue #2 | 0 | - | 4.43 | 55,529 |
| Human Body A-Z | 0 | - | 4.51 | 128,177 |
| Asian Cities A-Z by Clue | 0 | - | 4.53 | 32,664 |
| Animals A-Z #1 | 0 | - | 4.41 | 92,746 |
| Africa A-Z | 0 | - | 4.57 | 46,341 |
| Diseases and Medical Conditions A-Z | 0 | - | 4.60 | 47,438 |
| Ethnic Groups A-Z | 0 | - | 4.50 | 42,012 |
| Metals of Antiquity | 0 | - | 4.94 | 92,810 |
| Historic Journeys on a World Map | 0 | - | 4.99 | 46,077 |
| Space Exploration Trivia | 0 | - | 4.38 | 35,143 |
| Oldest Things | 0 | - | 3.92 | 65,582 |
| Famous Homes - Who Lived There? | 0 | - | 4.09 | 26,752 |
| Famous Firsts #2 | 0 | - | 4.00 | 80,830 |
| Famous Firsts #3 - The United States | 0 | - | 4.17 | 14,478 |
| Years in History #1 - Multiple Choice | 0 | - | 4.85 | 69,602 |
| Most Common English Verbs - Extreme | 0 | - | 4.96 | 155,622 |
| Disney A-Z | 0 | - | 4.37 | 86,052 |
| Literature by Letter - A | 0 | - | 4.23 | 31,730 |
| Literature by Letter - Q, X, Y, and Z | 0 | - | 4.42 | 15,055 |
| Companies A-Z | 0 | - | 4.30 | 42,598 |
| Top Five Exporting Partners by Country | 0 | - | 4.87 | 66,791 |
| Religion A-Z #1 | 0 | - | 4.32 | 61,458 |
| Religion A-Z #2 | 0 | - | 4.40 | 36,785 |
| Geography by Letter - G | 0 | - | 4.35 | 125,347 |
| Geography by Letter - F | 0 | - | 4.27 | 136,921 |
| Geography by Letter - J | 0 | - | 4.34 | 122,047 |
| Geography by Letter - O | 0 | - | 4.37 | 128,861 |
| Geography by Letter - V | 0 | - | 4.39 | 120,396 |
| Geography by Letter - W | 0 | - | 4.39 | 114,061 |
| Geography by Letter - Y | 0 | - | 4.39 | 110,527 |
| Geography by Letter - Z | 0 | - | 4.11 | 80,909 |
| Geography by Letter - Q | 0 | - | 4.38 | 68,769 |
| Same Start and End Letter - Geography #1 | 0 | - | 4.18 | 35,096 |
| Video Games A-Z | 0 | - | 4.08 | 38,640 |
| Geography A-Z #3 | 0 | - | 4.22 | 39,045 |
| Middle East A-Z | 0 | - | 4.46 | 45,741 |
| World Cities Based on Location A-Z - #1 | 0 | - | 4.45 | 44,112 |
| Movies that Start with A | 0 | - | 4.13 | 61,597 |
| Movies that Start with C | 0 | - | 4.30 | 61,526 |
| Movies that Start with B | 0 | - | 4.35 | 84,854 |
| Movies that Start with D | 0 | - | 4.34 | 68,186 |
| Movies that Start with E | 0 | - | 4.13 | 68,130 |
| Movies that Start with J | 0 | - | 4.18 | 75,877 |
| Movies that Start with L | 0 | - | 4.16 | 60,188 |
| Movies that Start with M | 0 | - | 4.28 | 48,028 |
| Movies that Start with N | 0 | - | 4.02 | 41,079 |
| Movies that Start with P | 0 | - | 4.25 | 53,964 |
| Movies that Start with R | 0 | - | 4.17 | 46,404 |
| Movies that Start with W | 0 | - | 4.07 | 44,104 |
| Movies that Start with T | 0 | - | 4.33 | 49,071 |
| Movies that Start with S | 0 | - | 4.35 | 56,226 |
| Movies that Start with F | 0 | - | 4.13 | 68,599 |
| Music by Letter - F | 0 | - | 4.48 | 26,768 |
| Music by Letter - A | 0 | - | 4.61 | 31,148 |
| Brand Logos That Start With D | 0 | - | 4.37 | 60,535 |
| Brand Logos That Start With C | 0 | - | 4.17 | 48,941 |
| Brand Logos That Start With L | 0 | - | 4.39 | 60,054 |
| Brand Logos That Start With S | 0 | - | 4.37 | 56,560 |
| Influential Women in History | 0 | - | 4.42 | 34,891 |
| Google What's the Difference? - History | 0 | - | 4.20 | 45,982 |
| Cradles of Civilization | 0 | - | 4.46 | 38,947 |
| Mythical Creatures Quiz #1 | 0 | - | 4.92 | 703,922 |
| Notable People of WWII | 0 | - | 4.53 | 85,268 |
| WWII Trivia #2 | 0 | - | 4.52 | 103,361 |
| World War I Quiz | 0 | - | 4.78 | 100,147 |
| WWI A-Z | 0 | - | 4.50 | 37,990 |
| Biggest Nations and Empires Ever | 0 | - | 4.46 | 145,061 |
| Famous Explorers | 0 | - | 4.58 | 35,909 |
| Famous Empires by Description | 0 | - | 4.70 | 117,457 |
| Answers by Time Period | 0 | - | 4.63 | 55,220 |
| Star Wars A-Z | 0 | - | 4.46 | 87,055 |
| Musical Acts by Letter - J | 0 | - | 4.20 | 77,110 |
| Musical Acts by Letter - M | 0 | - | 4.14 | 92,864 |
| Musical Acts by Letter - N | 0 | - | 4.17 | 68,030 |
| Musical Acts by Letter - P | 0 | - | 4.24 | 65,109 |
| Musical Acts by Letter - R | 0 | - | 4.33 | 82,915 |
| Musical Acts by Letter - T | 0 | - | 4.15 | 67,478 |
| Musical Acts by Letter - A | 0 | - | 4.29 | 82,226 |
| Musical Acts by Letter - B | 0 | - | 4.32 | 72,839 |
| Musical Acts by Letter - C | 0 | - | 4.33 | 59,860 |
| Musical Acts by Letter - D | 0 | - | 4.13 | 52,806 |
| Musical Acts by Letter - E | 0 | - | 4.36 | 61,331 |
| Animals that Start with A | 0 | - | 4.26 | 111,167 |
