| Metals of Antiquity | 0 | - | 4.94 | 93,063 |
| Rocks and Minerals Picture Quiz | 0 | - | 4.48 | 29,206 |
| Former Countries by Territory Map | 0 | - | 4.96 | 101,938 |
| Empires by Maps | 0 | - | 4.98 | 119,010 |
| Animals by Skeleton Image | 0 | - | 4.80 | 46,118 |
| Merged Company Logos #1 | 0 | - | 4.91 | 105,695 |
| Planets By Picture Quiz | 0 | - | 4.49 | 56,373 |
| Islands by Shape #2 | 0 | - | 4.88 | 59,073 |
| Visual Memory Test - Random Cartoons | 0 | - | 4.98 | 103,170 |
| Play-Doh People from History | 0 | - | 4.99 | 94,124 |
| Famous Landmarks Out Of Focus #1 | 0 | - | 4.89 | 60,504 |
| Jeppy in Disguise #1 | 0 | - | 4.92 | 48,901 |
| Jeppy in Disguise #2 | 0 | - | 4.96 | 49,090 |
| Circular Cutouts from a World Map | 0 | - | 4.98 | 61,182 |
| All Country Flags of the World | 0 | - | 5.00 | 3,619,250 |
| Elements Named for Countries | 0 | - | 4.52 | 24,493 |
| Country Flags Quiz #1 | 0 | - | 4.98 | 2,529,486 |
| Country Flags Quiz #2 | 0 | - | 4.98 | 1,088,896 |
| Country Flags Quiz #3 | 0 | - | 4.98 | 730,738 |
| Years in History by Picture | 0 | - | 4.44 | 35,230 |
| Make a Stained Glass Window | 0 | - | 5.00 | 68,022 |
| Famous Foreheads #1 | 0 | - | 4.47 | 74,413 |
| Flags with Crescents | 0 | - | 4.98 | 168,065 |
| Country Flag Trivia | 0 | - | 4.81 | 56,199 |
| Country Flags with Eagles - Picture Quiz | 0 | - | 4.98 | 102,746 |
| Country Flags with the Union Jack | 0 | - | 4.87 | 76,715 |
| Pixelated Flag Quiz | 0 | - | 4.98 | 86,284 |
| Flag Emblems Scavenger Hunt | 0 | - | 5.00 | 66,682 |
| Flags by Horizontal Stripes #1 | 0 | - | 4.84 | 84,595 |
| Country Flags with the Sun - Picture Quiz | 0 | - | 4.83 | 52,254 |
| Real vs. Fake Flags | 0 | - | 4.98 | 122,986 |
| National Football Team Logos | 0 | - | 4.85 | 179,237 |
| Merged Company Logos #2 | 0 | - | 4.75 | 76,964 |
| Countries with the Highest Carbon Dioxide Emissions | 0 | - | 4.97 | 109,577 |
| Name that Object #1 | 0 | - | 3.56 | 96,346 |
| Flags to Languages | 0 | - | 4.95 | 172,824 |
| Similar Country Flags - Multiple Choice Quiz | 0 | - | 4.94 | 50,177 |
| The Voyage of Darwin - Animated Map Quiz | 0 | - | 4.99 | 14,396 |
| Countries Reducing Carbon Dioxide Emissions the Most | 0 | - | 4.89 | 64,349 |
| Countries with the Most Forest | 0 | - | 4.87 | 146,794 |
| Countries with Glaciers | 0 | - | 4.97 | 104,781 |
| Fruits by Picture | 0 | - | 4.20 | 805,422 |
| Old Movies by Picture | 0 | - | 4.51 | 24,905 |
| Musical Instruments by Picture #2 | 0 | - | 4.24 | 46,775 |
| Geography by Picture - B | 0 | - | 4.42 | 55,469 |
| Geography by Picture - H | 0 | - | 4.50 | 58,091 |
| Geography by Picture - N | 0 | - | 4.45 | 42,086 |
| Geography by Picture - R | 0 | - | 4.56 | 40,917 |
| Geography by Picture - T | 0 | - | 4.54 | 57,721 |
| Random Logos Quiz | 0 | - | 4.31 | 207,425 |
| All North American Pro Sports Logos | 0 | - | 4.70 | 113,813 |
| Pictures by Letter - A | 0 | - | 4.17 | 33,211 |
| Pictures by Letter - J | 0 | - | 4.31 | 39,810 |
| Pictures by Letter - B | 0 | - | 4.31 | 43,700 |
| Pictures by Letter - D | 0 | - | 4.16 | 37,389 |
| Pictures by Letter - M | 0 | - | 4.24 | 37,600 |
| Body Parts in History and Culture | 0 | - | 4.42 | 35,183 |
| Three Real and One Fake - Country Flags | 0 | - | 4.97 | 83,494 |
| Pick a Picture - Animal Relations | 0 | - | 4.94 | 55,004 |
| Name that Historical Figure #1 | 0 | - | 4.63 | 336,156 |
| Name the Pixelated Landmark | 0 | - | 4.84 | 62,615 |
| Car Logos Quiz #1 | 0 | - | 4.44 | 534,332 |
| Name the Constellations - With a Map | 0 | - | 4.92 | 35,738 |
| Name that Bug | 0 | - | 4.12 | 45,484 |
| Islands by Shape #1 | 0 | - | 4.32 | 84,225 |
| 1970s Celebrities by Picture #1 | 0 | - | 4.20 | 57,716 |
| 1970s Celebrities by Picture #2 | 0 | - | 4.21 | 50,485 |
| Name that Object #2 | 0 | - | 3.64 | 15,353 |
| Islands by Picture | 0 | - | 4.29 | 106,202 |
| Name that Object #3 | 0 | - | 3.93 | 14,326 |
| Classic Movies by Movie Posters | 0 | - | 4.45 | 24,126 |
| 1980s Movie Silhouettes | 0 | - | 4.97 | 103,044 |
| Famous Landmarks Out Of Focus #2 | 0 | - | 4.37 | 40,948 |
| Animals by Close-up Image | 0 | - | 4.42 | 217,178 |
| Aquatic Mammals by Picture | 0 | - | 4.41 | 45,365 |
| Extinct Animals by Picture | 0 | - | 4.49 | 35,016 |
| Mammals by Picture #1 | 0 | - | 4.70 | 91,319 |
| 1940s Celebrities by Picture | 0 | - | 4.43 | 47,838 |
| International Footballers by Picture | 0 | - | 4.50 | 54,999 |
| Name that Historical Figure #2 | 0 | - | 4.43 | 283,313 |
| Name that Historical Figure #5 | 0 | - | 4.43 | 106,989 |
| Name that Historical Figure #7 - U.S. Edition | 0 | - | 4.50 | 50,485 |
| Geography by Picture - A | 0 | - | 4.39 | 60,102 |
| Geography by Picture - D | 0 | - | 4.15 | 45,538 |
| Geography by Picture - F | 0 | - | 4.31 | 50,870 |
| Geography by Picture - G | 0 | - | 4.38 | 47,840 |
| Geography by Picture - J | 0 | - | 4.16 | 38,363 |
| Geography by Picture - K | 0 | - | 4.29 | 33,042 |
| Geography by Picture - C | 0 | - | 4.31 | 56,960 |
| Geography by Picture - L | 0 | - | 4.37 | 58,817 |
| Geography by Picture - M | 0 | - | 4.14 | 40,370 |
| Geography by Picture - P | 0 | - | 4.24 | 42,332 |
| Geography by Picture - S | 0 | - | 4.38 | 46,947 |
| Miscellaneous Flags Quiz | 0 | - | 4.42 | 278,973 |
| Country Flags Multiple Choice | 0 | - | 4.97 | 143,796 |
| Flag Maths | 0 | - | 4.74 | 57,695 |
| Satellite Images #1 | 0 | - | 4.46 | 129,124 |
| Satellite Images Quiz #2 | 0 | - | 4.63 | 109,085 |
| Satellite Images Quiz #4 | 0 | - | 4.55 | 88,735 |
| Satellite Images Quiz #5 | 0 | - | 4.52 | 49,729 |
| Satellite Images Quiz #6 | 0 | - | 4.50 | 38,864 |
| Cities by Picture #1 | 0 | - | 4.73 | 85,549 |
| Soccer Team Logos | 0 | - | 4.26 | 371,936 |
| Brand Logos Quiz #1 | 0 | - | 4.83 | 2,408,128 |
| Ultimate Car Logos Quiz | 0 | - | 4.80 | 177,432 |
| Car Logos Quiz #2 | 0 | - | 4.43 | 260,113 |
| Video Game Logos Quiz | 0 | - | 4.40 | 183,046 |
| Movie Logos | 0 | - | 4.33 | 236,621 |
| Brand Logos That Start With M | 0 | - | 4.45 | 62,079 |
| Brand Logos That Start With B | 0 | - | 4.38 | 59,456 |
| Brand Logos That Start with A | 0 | - | 4.51 | 69,592 |
| Pictures by Letter - E | 0 | - | 3.49 | 34,338 |
| Pictures by Letter - G | 0 | - | 4.14 | 27,981 |
| Pictures by Letter - L | 0 | - | 4.14 | 30,398 |
| Pictures by Letter - F | 0 | - | 4.17 | 28,872 |
| Pictures by Letter - Z | 0 | - | 4.05 | 23,342 |
| Pictures by Letter - Y | 0 | - | 4.22 | 26,156 |
| Pictures by Letter - R | 0 | - | 4.09 | 24,644 |
| Pictures by Letter - K | 0 | - | 4.18 | 24,979 |
| Pictures by Letter - I | 0 | - | 4.16 | 30,238 |
| Pictures by Letter - N | 0 | - | 4.11 | 24,373 |
| Pictures by Letter - P | 0 | - | 4.05 | 25,916 |
| Pictures by Letter - U | 0 | - | 4.10 | 20,672 |
| Pictures by Letter - T | 0 | - | 4.34 | 27,541 |
| History by Picture - A | 0 | - | 4.25 | 45,554 |
| History by Picture - B | 0 | - | 4.40 | 48,688 |
| History by Picture - C | 0 | - | 4.36 | 54,197 |
| History by Picture - F | 0 | - | 4.35 | 37,683 |
| History by Picture - G | 0 | - | 4.40 | 41,930 |
| History by Picture - D | 0 | - | 4.29 | 44,102 |
| History by Picture - E | 0 | - | 4.27 | 43,722 |
| History by Picture - H | 0 | - | 4.37 | 36,624 |
| History by Picture - K | 0 | - | 4.35 | 33,182 |
| History by Picture - M | 0 | - | 4.17 | 35,983 |
| History by Picture - N | 0 | - | 4.40 | 41,068 |
| History by Picture - O | 0 | - | 4.39 | 36,125 |
| History by Picture - T | 0 | - | 4.20 | 33,164 |
| Name that Nut, Seed, or Bean | 0 | - | 4.63 | 56,971 |
| Animals - Taxonomy to Common Name | 0 | - | 4.80 | 28,158 |
| Countries with the Most HIV | 0 | - | 4.46 | 44,359 |
| Countries with the Most Malaria Deaths | 0 | - | 4.45 | 45,010 |
| Countries that Desalinate the Most Water | 0 | - | 4.77 | 41,437 |
| Art Works Picture Quiz #1 | 0 | - | 4.51 | 118,642 |
| Art Works Picture Quiz #2 | 0 | - | 4.49 | 104,883 |
| Musical Instruments by Picture #1 | 0 | - | 4.52 | 268,230 |
| Flowers by Picture | 0 | - | 4.46 | 105,094 |
| Art Works Picture Quiz #3 | 0 | - | 4.45 | 48,592 |
| Authors by Picture | 0 | - | 4.48 | 25,443 |
| Fruit and Vegetable Emojis | 0 | - | 4.43 | 79,702 |
| WWII Figures by Picture | 0 | - | 4.85 | 50,747 |
| College Sports Logos Quiz #3 | 0 | - | 4.30 | 55,321 |
| Songs by Picture Quiz #1 | 0 | - | 4.68 | 65,544 |
| Songs by Picture Quiz #2 | 0 | - | 4.42 | 58,564 |
| Fish by Picture #1 | 0 | - | 4.41 | 108,230 |
| Animals A-Z by Picture | 0 | - | 4.08 | 66,075 |
| Mammals by Picture #3 | 0 | - | 4.39 | 61,871 |
| Mammals by Picture #4 | 0 | - | 4.03 | 33,979 |
| Birds by Picture #1 | 0 | - | 4.47 | 41,291 |
| Mammals by Picture #2 | 0 | - | 4.28 | 57,989 |
| Oscar Nominated Actors by Picture #1 | 0 | - | 4.42 | 164,621 |
| 1960s Celebrities by Picture #1 | 0 | - | 4.27 | 70,136 |
| 1960s Celebrities by Picture #2 | 0 | - | 4.26 | 51,213 |
| 1950s Celebrities by Picture #1 | 0 | - | 4.24 | 50,993 |
| 1980s Celebrities by Picture #2 | 0 | - | 4.19 | 71,375 |
| 1990s Celebrities by Picture #1 | 0 | - | 4.13 | 79,120 |
| 1990s Celebrities by Picture #2 | 0 | - | 4.16 | 72,067 |
| 2000s Celebrities by Picture #2 | 0 | - | 4.15 | 94,792 |
| 1950s Celebrities by Picture #2 | 0 | - | 4.29 | 45,986 |
| Name that Historical Figure #3 | 0 | - | 4.36 | 238,368 |
| Name that Historical Figure #4 | 0 | - | 4.29 | 158,419 |
| Name that Historical Figure #6 | 0 | - | 4.27 | 92,753 |
| Musicians by Picture #1 | 0 | - | 4.39 | 107,611 |
| Musicians by Picture #2 | 0 | - | 4.29 | 75,623 |
| Musicians by Picture #4 | 0 | - | 4.07 | 64,295 |
| Musicians by Picture #3 | 0 | - | 4.10 | 58,523 |
| Emoji Flags | 0 | - | 4.35 | 43,884 |
| Fill the Map of Europe by Guessing Flag Colors | 0 | - | 4.64 | 37,571 |
| Languages by Combined Flags | 0 | - | 4.53 | 99,389 |
| Satellite Images Quiz #3 | 0 | - | 4.35 | 73,290 |
| Satellite Images - Island Chains | 0 | - | 4.43 | 65,932 |
| Islands by Satellite Image #1 | 0 | - | 4.70 | 70,278 |
| Peninsulas by Satellite Image | 0 | - | 4.53 | 27,706 |
| Landmarks Picture Quiz #1 | 0 | - | 4.16 | 393,432 |
| Airline Logos | 0 | - | 4.45 | 140,164 |
| Fast Food Logos Quiz | 0 | - | 4.44 | 247,353 |
| Mostly-American Candy Logos | 0 | - | 4.14 | 158,187 |
| Brand Logos That Start With S | 0 | - | 4.37 | 56,987 |
| Brand Logos That Start With D | 0 | - | 4.37 | 60,945 |
| Brand Logos That Start With L | 0 | - | 4.39 | 60,484 |
| Brand Logos That Start With C | 0 | - | 4.17 | 49,205 |
| Vegetables by Picture | 0 | - | 4.39 | 63,007 |
| Pick a Picture - Musical Instruments | 0 | - | 4.53 | 51,982 |
| Albert Einstein Trivia | 0 | - | 4.58 | 18,331 |
| Animal Anatomy Quiz | 0 | - | 4.39 | 59,719 |
| Organs of the Human Body (with map) | 0 | - | 4.10 | 118,743 |
| Countries with the Most Mangroves | 0 | - | 4.53 | 34,510 |
| Worst Plastic Polluting Countries | 0 | - | 4.51 | 66,215 |
| Least-Forested Countries | 0 | - | 4.53 | 64,985 |
| Tropical Rainforest Countries | 0 | - | 4.68 | 81,823 |
| Northernmost Countries Without Glaciers | 0 | - | 4.61 | 36,088 |
